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1

LOWER PORTNEUF RIVER, IDAHO - WATER QUALITY STATUS REPORT, 1977  

EPA Science Inventory

This paper describes the results of a 12 month, bi-weekly water quality sampling program on the Lower Portneuf River, Idaho (17040208). Samples were collected at 7 river stations, 5 effluents, and a major stream. The results indicate that Marsh Creek, a major tributary draining...

2

UPPER PORTNEUF RIVER, CARIBOU COUNTY, IDAHO - WATER QUALITY STATUS REPORT, 1985  

EPA Science Inventory

The purposes of this study were to document the water quality status of the Upper Portneuf River, Idaho (17040208), to provide information and education to area farmers and ranchers concerning agricultural non-point sources of pollution, and in combination with the Soil Conservat...

3

ASSESSMENT OF POSSIBLE EFFECTS OF POCATELLO'S TREATED WASTEWATER ON THE BIOLOGY AND CHEMISTRY OF THE PORTNEUF RIVER, IDAHO. 1989  

EPA Science Inventory

This report describes results of a study to determine possible effects of Pocatellos Wastewater Treatment Plant (WWTP) on the Portneuf River, Idaho (17040208). The scope of this report includes data collected on water chemistry, macroinvertebrates, and fish during fall 1988 and ...

4

Evaluation of a combined macrophyte-epiphyte bioassay for assessing nutrient enrichment in the Portneuf River, Idaho, USA.  

PubMed

We describe and evaluate a laboratory bioassay that uses Lemna minor L. and attached epiphytes to characterize the status of ambient and nutrient-enriched water from the Portneuf River, Idaho. Specifically, we measured morphological (number of fronds, longest surface axis, and root length) and population-level (number of plants and dry mass) responses of L. minor and community-level (ash-free dry mass [AFDM] and chlorophyll a [Chl a]) responses of epiphytes to nutrient enrichment. Overall, measures of macrophyte biomass and abundance increased with increasing concentrations of dissolved phosphorus (P) and responded more predictably to nutrient enrichment than morphological measures. Epiphyte AFDM and Chl a were also greatest in P-enriched water; enrichments of N alone produced no measurable epiphytic response. The epiphyte biomass response did not directly mirror macrophyte biomass responses, illustrating the value of a combined macrophyte-epiphyte assay to more fully evaluate nutrient management strategies. Finally, the most P-enriched waters not only supported greater standing stocks of macrophyte and epiphytes but also had significantly higher water column dissolved oxygen and dissolved organic carbon concentrations and a lower pH. Advantages of this macrophyte-epiphyte bioassay over more traditional single-species assays include the use of a more realistic level of biological organization, a relatively short assay schedule (~10 days), and the inclusion of multiple biological response and water-quality measures. PMID:24549944

Ray, Andrew M; Mebane, Christopher A; Raben, Flint; Irvine, Kathryn M; Marcarelli, Amy M

2014-07-01

5

Evaluation of a combined macrophyte–epiphyte bioassay for assessing nutrient enrichment in the Portneuf River, Idaho, USA  

USGS Publications Warehouse

We describe and evaluate a laboratory bioassay that uses Lemna minor L. and attached epiphytes to characterize the status of ambient and nutrient-enriched water from the Portneuf River, Idaho, USA. Specifically, we measured morphological (number of fronds, longest surface axis, root length) and population-level (number of plants, dry mass) responses of L. minor, and community-level (ash free dry mass [AFDM] and chlorophyll a [chl a]) responses of epiphytes to nutrient enrichment. Overall, measures of macrophyte biomass and abundance increased with increasing concentrations of dissolved phosphorus (P) and responded more predictably to nutrient enrichment than morphological measures. Epiphyte AFDM and chl a were also greatest in P enriched-water; enrichments of N alone produced no measurable epiphytic response. The epiphyte biomass response did not directly mirror macrophyte biomass responses, illustrating the value of a combined macrophyte-epiphyte assay to more fully evaluate nutrient management strategies. Finally, the most P-enriched waters not only supported greater standing stocks of macrophyte and epiphytes, but also had significantly higher water column dissolved oxygen and dissolved organic carbon concentrations and a lower pH. Advantages of this macrophyte-epiphyte bioassay over more traditional single species assays include the use of a more realistic level of biological organization, a relatively short assay schedule (~10 days), and the inclusion of multiple biological response and water quality measures.

Ray, Andrew M.; Mebane, Christopher A.; Raben, Flint; Irvine, Kathryn M.; Marcarelli, Amy M.

2014-01-01

6

AN ANALYSIS OF MINIMUM FLOW REQUIREMENTS IN THE SNAKE, BLACKFOOT, AND PORTNEUF RIVERS. 1976  

EPA Science Inventory

This study was done in support of an analysis of the State of Idahos Water Plan. The report analyzes the impact of low flows upon dissolved oxygen in the Snake, Blackfoot, and Portneuf Rivers, Idaho (17040201, 17040206). A steady-state water quality model (Yearsley, 1975) was u...

7

Raptor ecology of Raft River Valley, Idaho  

Microsoft Academic Search

Raptor data were gathered in the 988-km² Raft River Valley in southcentral Idaho while conducting a tolerance study on the nesting Ferruginous Hawk (Buteo regalis) near the Department of Energy's Raft River Geothermal Site. Prior research from 1972 to 1977 on the nesting activity of the Ferruginous Hawk population provided a historical information base. These data are combined with new

T. L. Thurow; C. M. White; R. P. Howard; J. F. Sullivan

1980-01-01

8

Geothermal features of Snake River plain, Idaho  

Microsoft Academic Search

The Snake River plain is the track of a hot spot beneath the continental lithosphere. The track has passed through southern Idaho as the continental plate has moved over the hot spot at a rate of about 3.5 cm\\/yr. The present site of the hot spot is Yellowstone Park. As a consequence of the passage, a systematic sequence of geologic

Blackwell

1987-01-01

9

Raptor ecology of Raft River Valley, Idaho  

SciTech Connect

Raptor data were gathered in the 988-km/sup 2/ Raft River Valley in southcentral Idaho while conducting a tolerance study on the nesting Ferruginous Hawk (Buteo regalis) near the Department of Energy's Raft River Geothermal Site. Prior research from 1972 to 1977 on the nesting activity of the Ferruginous Hawk population provided a historical information base. These data are combined with new Ferruginous Hawk data collected between 1978 and 1980 to give a continuous 9-year breeding survey. Information on the distribution, density, and production of the other raptor species found in the study area during 1978 and 1979 is also provided.

Thurow, T.L.; White, C.M.; Howard, R.P.; Sullivan, J.F.

1980-09-01

10

KOOTENAI RIVER, BOUNDARY COUNTY, IDAHO - WATER QUALITY STATUS REPORT, 1977  

EPA Science Inventory

The Kootenai River (17010104) is a major tributary to the Columbia River, draining southern British Columbia, northwestern Montana, and portions of northern Idaho. One-third of the river lies in the United States, its source and mouth are in Canada. The vast majority of the dra...

11

ECOLOGICAL RISK ASSESSMENT FOR THE MIDDLE SNAKE RIVER, IDAHO  

EPA Science Inventory

An ecological risk assessment was completed for the Middle Snake River, Idaho. In this assessment, mathematical simulations and field observations were used to analyze exposure and ecological effects and to estimate risk. The Middle Snake River which refers to a 100 km stret...

12

[UPPER POTLATCH RIVER STUDY, LATAH COUNTY, IDAHO. 1979  

EPA Science Inventory

In Water Year 1979, a water quality study was conducted on the Upper Potlatch River near Bovill in Latah County, Idaho (17060306) to determine the present water quality of the stream and to obtain background information to determine effluent limitations for the City of Bovill sew...

13

WEISER RIVER STUDY, ADAMS AND WASHINGTON COUNTIES, IDAHO, 1979  

EPA Science Inventory

During the 1979 water year, a water quality study was conducted on the Weiser and Little Weiser Rivers (17050124) in Washington and Adams Counties, Idaho. The study was completed to obtain background information on effluent limitations for the cities of Cambridge and Council and...

14

BEAR RIVER BASIN, IDAHO - WATER QUALITY INVESTIGATION, 1974  

EPA Science Inventory

The quality of the waters in the Bear River Basin, Idaho (160102) was surveyed from August 27 to August 29, 1974. The purposes of the survey were to determine point and non-point source loading, to determine whether water quality has improved since the adoption of the 1958 Enfor...

15

Neogene paleogeography of western Snake River plain, Idaho and Oregon  

Microsoft Academic Search

Analysis of Miocene through Pleistocene siliciclastic and volcaniclastic sequences in the western Snake River Plain of Idaho and Oregon allows detailed paleogeographic reconstruction of sedimentation associated with the development of a rapidly subsiding continental basin. Extensional tectonism was accompanied by voluminous outpourings of basaltic and silicic volcanic material. These in turn were reworked basinward by marginal alluvial fan-braided stream networks

M. L. Porter; L. T. Middleton

1984-01-01

16

77 FR 73976 - Nez Perce-Clearwater National Forests; Idaho; Crooked River Valley Rehabilitation Project  

Federal Register 2010, 2011, 2012, 2013

...Perce-Clearwater National Forests; Idaho; Crooked River Valley Rehabilitation Project AGENCY: Forest...Environmental Impact Statement for the Crooked River Valley Rehabilitation Project. The Red River Ranger District of the Nez Perce-...

2012-12-12

17

Hydrothermal injection experiments at the Raft River KGRA, Idaho  

SciTech Connect

The optimal development and management of a geothermal resource requires a knowledge of the hydrological characteristics of the reservoir. Reservoir engineering analysis techniques for permeable aquifers have been undergoing development for several decades but little attention has been paid to fracture-dominated systems. A program to test the ability of Huff-Puff tests to help characterize a fracture-dominated reservoir is presented. Several series of these injection (Huff)-backflow (Puff) tests were conducted at the Raft River KGRA in Southern Idaho. These test series are described and preliminary results and interpretations are discussed.

Downs, W.F.; McAtee, R.E.; Capuano, R.M.; Sill, W.

1982-12-14

18

Steelhead Supplementation in Idaho Rivers : 2001 Project Progress Report.  

SciTech Connect

In 2001, Idaho Department of Fish and Game (IDFG) continued an assessment of the Sawtooth Hatchery steelhead Oncorhynchus mykiss stock to reestablish natural populations in Beaver and Frenchman creeks in the upper Salmon River. Crews stocked both streams with 20 pair of hatchery adults, and I estimated the potential smolt production from the 2000 adult outplants. n the Red River drainage, IDFG stocked Dworshak hatchery stock fingerlings and smolts from 1993 to 1999 to assess which life stage produces more progeny when the adults return to spawn. In 2001, IDFG operated the Red River weir to trap adults that returned from these stockings, but none were caught from either group. Wild steelhead populations in the Lochsa and Selway river drainages were assessed and the chinook salmon Oncorhynchus tshawytscha escapement was enumerated in Fish Creek. I estimated that 75 wild adult steelhead and 122 adult chinook salmon returned to Fish Creek in 2001. I estimated that slightly more than 30,000 juvenile steelhead migrated out of Fish Creek. This is the largest number of steelhead to migrate out of Fish Creek in a single year since I began estimating the yearly migration in 1994. Juvenile steelhead densities in Lochsa and Selway tributaries were somewhat higher in 2001 than those observed in 2000. Crews from IDFG collected over 4,800 fin samples from wild steelhead in 74 streams of the Clearwater, Snake, and Salmon river drainages and from five hatchery stocks during the summer of 2000 for a DNA analysis to assess Idaho's steelhead stock structure. The DNA analysis was subcontracted to Dr. Jennifer Nielsen, Alaska Biological Science Center, Anchorage. Her lab developed protocols to use for the analysis in 2001 and is continuing to analyze the samples. Dr. Nielsen plans to have the complete set of wild and hatchery stocks analyzed in 2002.

Byrne, Alan

2002-03-01

19

Assessing streamflow sensitivity to temperature increases in the Salmon River Basin, Idaho  

E-print Network

Assessing streamflow sensitivity to temperature increases in the Salmon River Basin, Idaho Chunling in the Salmon River Basin (SRB) of Idaho and are anticipated to contin- ue increasing in the future, leading and ecological processes. Published by Elsevier B.V. 1. Introduction Climate changes have occurred in the Salmon

Crosby, Benjamin T.

20

Salmon Supplementation Studies in Idaho Rivers; Idaho Supplementation Studies, 1992 Annual Report.  

SciTech Connect

This is the first annual summary of results for chinook salmon supplementation studies in Idaho Rivers conducted by the Nez Perce Tribe Department of Fisheries Management. The Nez Perce Tribe has coordinated chinook salmon supplementation research activities with the Bonneville Power Administration, Idaho Department of Fish and Game, U. S. Fish and Wildlife Service, National Marine Fisheries Service, U. S. Forest Service, and the Shoshone Bannock Tribe. The project is a cooperative effort involving members of the Idaho Supplementation Technical Advisory Committee (ISTAC). This project has also been extensively coordinated with the Supplementation Technical Work Group (STWG) which identified specific research needs and integrated and coordinated supplementation research activities through development of a five year work plan. In this study we are assessing what strategies, both brood stock and release stage, are best for supplementing natural or depleted spring and summer chinook populations and what effect supplementation has on these populations. This research should identify which of the supplementation strategies employed are beneficial in terms of increasing adult returns and the ability of these returns to sustain themselves. Biological evaluation points will be parr density, survival to Lower Granite Dam, adult return to weirs, redd counts and presmolt and smolt yield from both treatment and control streams. Genetic monitoring of treatment and control populations will also occur. The supplementation research study has the following objectives: (1) Monitor and evaluate the effect of supplementation on presmolt and smolt numbers and spawning escapements of naturally produced salmon. (2) Monitor and evaluate changes in natural productivity and genetic composition of target and adjacent populations following supplementation. (3) Determine which supplementation strategies (brood stock and release stage) provide the quickest and highest response in natural production without adverse effects on productivity. (4) Coordinate supplementation research planning and field evaluation program activities and management recommendations for the Nez Perce Tribe.

Arnsberg, Billy D. (Nez Perce Tribe, Lapwai, ID)

1993-02-02

21

Iodine-129 in the Snake River Plain aquifer at the Idaho National Engineering Laboratory, Idaho  

USGS Publications Warehouse

From 1953 to 1983, an estimated 0.01 to 0.136 Ci (curies)/year of iodine-129 were contained in wastewater generated by the ICPP (Idaho Chemical Processing Plant) at the Idaho National Engineering Laboratory. The wastewater was directly discharged to the Snake River Plain aquifer through a deep disposal well until February 9, 1984, when the well was replaced by an unlined infiltration pond; a second pond was put into use on October 17, 1985. For 1984-86, the annual amount of iodine-129 in wastewater discharged to the ponds ranged from 0.0064 to 0.039 Ci. In August 1986, iodine-129 concentrations in water from 35 wells near the ICPP ranged from less than the reporting level to 3.6 +or-0.4 pCi/L (picocuries/L). By comparison, in April 1977 the water from 20 wells contained a maximum of 27 +or-1 pCi/L of iodine-129; in 1981, the maximum concentration in water from 32 wells was 41 +or-2 pCi/L. The average concentrations of iodine-129 in water from 18 wells that were sampled in 1977, 1981 and 1986 were 4.0, 6.7 and 1.3 pCi/L, respectively. The marked decrease in the iodine-129 concentration from 1981 to 1986 is the result of three factors: (1) The amount of iodine-129 disposed annually; (2) a change from the routine use of the disposal well to the infiltration ponds; and (3) a dilution of the iodine-129 in the aquifer by recharge from the Big Lost River. (USGS)

Mann, L.J.; Chew, E.W.; Morton, J.S.; Randolph, R.B.

1988-01-01

22

Steelhead Supplementation in Idaho Rivers, 2000 Annual Report.  

SciTech Connect

In 2000, we continued our assessment of the Sawtooth Hatchery steelhead stock to reestablish natural populations in Beaver and Frenchman creeks in the upper Salmon River. We stocked both streams with 15 pair of hatchery adults and estimated the potential smolt production from the 1999 outplant. I estimated that about nine smolts per female could be produced in both streams from the 1999 outplant. The smolt-to-adult return would need to exceed 20% to return two adults at this level of production. In the Red River drainage, we stocked Dworshak hatchery stock fingerlings and smolts, from 1993 to 1999, to assess which life-stage produces more progeny when the adults return to spawn. In 2000, we operated the Red River weir to trap adults that returned from these stockings, but none were caught from either group. We continued to monitor wild steelhead populations in the Lochsa and Selway river drainages. We estimated that 26 wild adult steelhead returned to Fish Creek. This is the lowest adult escapement we have documented (when the weir was intact all spring) since we began monitoring Fish Creek in 1992. I estimated that nearly 25,000 juvenile steelhead migrated out of Fish Creek this year. Juvenile steelhead densities in Lochsa and Selway tributaries were similar to those observed in 1999. In 2000, we obtained funding for a DNA analysis to assess Idaho's steelhead stock structure. We collected fin samples from wild steelhead in 70 streams of the Clearwater, Snake, and Salmon River drainages and from our five hatchery stocks. The DNA analysis was subcontracted to Dr. Jennifer Nielsen, Alaska Biological Science Center, Anchorage, and will be completed in 2001.

Byrne, Alan

2001-01-01

23

The geology of East Butte, a rhyolitic volcanic dome on the Eastern Snake River Plain, Idaho  

Microsoft Academic Search

East Butte is a prominent volcanic dome located on the eastern Snake River Plain. It is situated 51 km west of Idaho Fallls in the southeast corner of the Idaho National Engineering facility. East Butte rises 350 meters above the Quaternary basalt flows which encircle its 2.4 kilometer diameter base. Its maximum elevation is 2003 meters above sea level. East

J. E. Bretches; J. S. King

1985-01-01

24

Types of phreatomagmatic volcanoes in the western Snake River Plain, Idaho, USA  

Microsoft Academic Search

The western Snake River Plain graben in southwestern Idaho includes a large hydrovolcanic field which was produced in late Miocene to Pleistocene time by the interaction of rising basaltic magmas with the waters and water-saturated deposits of an enormous freshwater lake, Lake Idaho. The phreatomagmatic volcanoes in this field may be grouped into three types: emergent, subaqueous and subaerial. Emergent

Martha M. Godchaux; Bill Bonnichsen; Margaret D. Jenks

1992-01-01

25

Hot dry rock geothermal site evaluation, Western Snake River Plain, Idaho  

Microsoft Academic Search

Geologic, geophysical, hydrologic, and water chemistry studies have been performed to evaluate a hot dry rock geothermal prospect along the northern margin of the Western Snake River Plain, Idaho. The potential reservoir rock, Idaho Batholith granite, outcrops just north of the site, and is step faulted down to the south; it is more than 3 km deep in the southern

B. H. Arney; J. H. Beyer; D. B. Simon; F. B. Tonani; R. B. Weiss

1980-01-01

26

Final Technical Resource Confirmation Testing at the Raft River Geothermal Project, Cassia County, Idaho  

SciTech Connect

Incorporates the results of flow tests for geothermal production and injection wells in the Raft River geothermal field in southern Idaho. Interference testing was also accomplished across the wellfield.

Glaspey, Douglas J.

2008-01-30

27

POTLATCH RIVER, LATAH, CLEARWATER, AND NEZ PERCE COUNTIES, IDAHO - PRELIMINARY INVESTIGATION REPORT, 1994  

EPA Science Inventory

The Latah Soil and Water Conservation District requested assistance from the Soil Conservation Service in the development of appropriate criteria for prioritizing subwatersheds in the Potlatch River Basin, Idaho (17060306) for the implementation of a long term watershed treatment...

28

Evaluate Status of Pacific Lamprey in the Clearwater River Drainage, Idaho, Annual Report 2002.  

SciTech Connect

In 2002 Idaho Department of Fish and Game continued investigation into the status of Pacific lamprey populations in Idaho's Clearwater River drainage. Trapping, electrofishing, and spawning ground redd surveys were used to determine Pacific lamprey distribution, life history strategies, and habitat requirements in the South Fork Clearwater River, Lochsa River, Selway River, and Middle Fork Clearwater River subbasins. Five-hundred forty-one ammocoetes were captured electroshocking 70 sites in the South Fork Clearwater River, Lochsa River, Selway River, Middle Fork Clearwater River, Clearwater River, and their tributaries in 2002. Habitat utilization surveys in Red River support previous work indicating Pacific lamprey ammocoete densities are greater in lateral scour pool habitats compared to riffles and rapids. Presence-absence survey findings in 2002 augmented 2000 and 2001 indicating Pacific lamprey macrothalmia and ammocoetes are not numerous or widely distributed. Pacific lamprey distribution was confined to the lower reaches of Red River below rkm 8.0, the South Fork Clearwater River, Lochsa River (Ginger Creek to mouth), Selway River (Race Creek to mouth), Middle Fork Clearwater River, and the Clearwater River (downstream to Potlatch River).

Cochnauer, Tim; Claire, Christopher

2003-10-01

29

Monitor well responses at the Raft River, Idaho, Geothermal Site  

SciTech Connect

Effects of geothermal fluid production and injection on overlying ground-water aquifers have been studied at the Raft River Geothermal Site in southcentral Idaho. Data collected from 13 monitor wells indicate a complex fractured and porous media controlled ground-water flow system affected by natural recharge and discharge, irrigation withdrawal, and geothermal withdrawal and injection. The monitor wells are completed in aquifers and aquitards overlying the principal geothermal aquifers. Potentiometric heads and water quality are significantly affected by natural upward geothermal leakage via faults and matrix seepage. No significant change in water quality data has been observed, but potentiometric head changes resulted due to geothermal resource testing and utilization. Long-term hydrographs for the wells exhibit three distinct patterns, with superimposed responses due to geothermal pumping and injection. Well hydrographs typical of the Shallow aquifer exhibit effects of natural recharge and irrigation withdrawals. For selected wells, pressure declines due to injection and pressure buildup associated with pumping are observed. The latter effect is presumably due to the elastic deformation of geologic material overlying the stressed aquifers. A second distinct pattern occurs in two wells believed to be hydraulically connected to the underlying Intermediate aquifer via faults. These wells exhibit marked buildup effects due to injection as well as responses typical of the Shallow aquifer. The third pattern is demonstrated by three monitor wells near the principal production wells. This group of wells exhibits no seasonal potentiometric head fluctuations. Fluctuations which do occur are due to injection and pumpage. The three distinct hydrograph patterns are composites of the potentiometric head responses occurring in the various aquifers underlying the Raft River Site.

Skiba, P.A.; Allman, D.W.

1984-05-01

30

Stream Seepage and Groundwater Levels, Wood River Valley, South-Central Idaho, 2012-13.  

National Technical Information Service (NTIS)

Stream discharge and water levels in wells were measured at multiple sites in the Wood River Valley, south.central Idaho, in August 2012, October 2012, and March 2013, as a component of data collection for a groundwater-flow model of the Wood River Valley...

J. R. Bartolino

2014-01-01

31

The Snake River Plain, Idaho - Representative of a new category of volcanism  

Microsoft Academic Search

Studies of the volcanic geology of the Snake River Plain, Idaho, and comparison with other basaltic regions suggest a new category of volcanic activity, termed basaltic plains volcanism. Typified by the Snake River Plain, this style of volcanism is intermediate between basaltic flood (or plateau) eruptions and Hawaiian volcanism. Characteristics that are common to both Hawaiian and plains volcanism are:

Ronald Greeley

1982-01-01

32

Late Quaternary Basin-Range faulting north of the eastern Snake River Plain, Idaho  

Microsoft Academic Search

In the decade since the Borah Peak earthquake, paleoseismic studies have elucidated details of the late Quaternary histories of the Lost River, Lemhi, and Beaverhead faults of eastern Idaho, which comprise part of the northward continuation of the Basin-Range province across the Eastern Snake River Plain (ESRP). The faults are segmented but have temporally and\\/or spatially clustered paleoseismic activity. Each

Knuepfer

1993-01-01

33

LOWER COEUR D'ALENE RIVER, IDAHO. A MANAGEMENT ANALYSIS OF BLM LANDS, 1990  

EPA Science Inventory

This study was intended to provide guidance to BLM for future management of the Lower Coeur dAlene River area, Idaho (17010301, 17010303), giving full consideration to the potential environmental and human health issues in the river and its lateral lakes caused by the presence of...

34

Preliminary geological interpretation and lithologic log of the exploratory geothermal test well (INEL-1), Idaho National Enginering Laboratory, eastern Snake River Plain, Idaho  

Microsoft Academic Search

A 10,365 ft (3159 m) geothermal test well was drilled in the spring of 1979 at the Idaho National Engineering Laboratory, eastern Snake River Plain, Idaho. The majority of rock types encountered in the borehole are of volcanic origin. An upper section above 2445 ft (745 m) consists of basaltic lava flows and interbedded sediments of alluvial, lacustrine, and volcanic

D. J. Doherty; L. A. McBroome; M. A. Kuntz

1979-01-01

35

Stratigraphy of the unsaturated zone and the Snake River Plain aquifer at and near the Idaho National Engineering Laboratory, Idaho  

SciTech Connect

The unsaturated zone and the Snake River Plain aquifer at and near the Idaho National Engineering Laboratory (INEL) are made up of at least 178 basalt-flow groups, 103 sedimentary interbeds, 6 andesite-flow groups, and 4 rhyolite domes. Stratigraphic units identified in 333 wells in this 890-mile{sup 2} area include 121 basalt-flow groups, 102 sedimentary interbeds, 6 andesite-flow groups, and 1 rhyolite dome. Stratigraphic units were identified and correlated using the data from numerous outcrops and 26 continuous cores and 328 natural-gamma logs available in December 1993. Basalt flows make up about 85% of the volume of deposits underlying the area.

Anderson, S.R.; Liszewski, M.J.

1997-08-01

36

FLORISTIC INVENTORY OF SUBALPINE PARKS IN THE COEUR D'ALENE RIVER DRAINAGE, NORTHERN IDAHO  

Microsoft Academic Search

ABSTRACT Treeless,summits,and,ridges,in the,otherwise,densely,forested mountains of northern Idaho, have a relatively unique flora compared with surrounding communities. Although small in area, these,subalpine,parks,add,greatly,to the,biotic,diversity,of the regional,landscape,and,are,habitats,for,several,vascular,taxa considered,rare,in Idaho.,I conducted,a floristic,inventory,of 32 parks,in the,mountains,of the,Coeur,d'Alene,River,drainage,and adjacent,portions,of the,St. Joe drainage.,The,project,is a cooperative,one,between,the,Idaho,Department,of Fish,and,Game's Conservation,Data Center,and,the,Idaho,Panhandle,National,Forest. The subalpine,park,flora,contains,151 taxa,representing,97 genera in 34 families. Carex are surprisingly depauperate, in terms of both numbers and cover, as

Robert K. Moseley

37

THE CHANNELS AND WATERS OF THE UPPER SALMON RIVER AREA, IDAHO. (HYDROLOGIC EVALUATION OF THE UPPER SALMON RIVER AREA)  

EPA Science Inventory

The upper 1,800 square miles of the Salmon River drainage basin (17060201) in south-central Idaho is an area of great scenic beauty and little-disturbed natural environment. Proper development and use of this land and its natural resources are contingent on a multifaceted and de...

38

Water-quality data for the Boise River, Boise to Star, Idaho, January to March 1988  

USGS Publications Warehouse

Physical and chemical data were collected at six sites and biological data were collected at five sites on the Boise River between Veterans Memorial Parkway in Boise and Star, Idaho, from January to March 1988. Data were collected to determine the effect of sewage effluent from two Boise wastewater treatment facilities on the water and biological quality of the Boise River. Similar data were collected from October to December 1987. Results of all data analyses will be discussed in an interpretive report.

Frenzel, S. A.; Hansen, T. F.

1988-01-01

39

Preliminary delineation of natural geochemical reactions, Snake River Plain aquifer system, Idaho National Engineering Laboratory and vicinity, Idaho  

SciTech Connect

The U.S. Geological Survey, in cooperation with the U.S. Department of Energy, is conducting a study to determine the natural geochemistry of the Snake River Plain aquifer system at the Idaho National Engineering Laboratory (INEL), Idaho. As part of this study, a group of geochemical reactions that partially control the natural chemistry of ground water at the INEL were identified. Mineralogy of the aquifer matrix was determined using X-ray diffraction and thin-section analysis and theoretical stabilities of the minerals were used to identify potential solid-phase reactants and products of the reactions. The reactants and products that have an important contribution to the natural geochemistry include labradorite, olivine, pyroxene, smectite, calcite, ferric oxyhydroxide, and several silica phases. To further identify the reactions, analyses of 22 representative water samples from sites tapping the Snake River Plain aquifer system were used to determine the thermodynamic condition of the ground water relative to the minerals in the framework of the aquifer system. Principal reactions modifying the natural geochemical system include congruent dissolution of olivine, diopside, amorphous silica, and anhydrite; incongruent dissolution of labradorite with calcium montmorillonite as a residual product; precipitation of calcite and ferric oxyhydroxide; and oxidation of ferrous iron to ferric iron. Cation exchange reactions retard the downward movement of heavy, multivalent waste constituents where infiltration ponds are used for waste disposal.

Knobel, L.L.; Bartholomay, R.C.; Orr, B.R.

1997-05-01

40

Longitudinal and Seasonal Distribution of Benthic Invertebrates in the Little Lost River, Idaho  

Microsoft Academic Search

A yearlong investigation of the Little Lost River, Idaho (five sites) was conducted to determine the environmental conditions and benthic invertebrate community composition of the stream and to discover factors responsible for distribution of the benthos. All chemical constituents measured showed a tendency to increase from headwaters to mouth. Stream temperatures ranged from 0-15 C near the headwaters and 0

Douglas A. Andrews; G. Wayne Minshall

1979-01-01

41

Steelhead Genetic Diversity at Multiple Spatial Scales in a Managed Basin: Snake River, Idaho  

Microsoft Academic Search

We investigated the genetic diversity of steelhead Oncorhynchus mykiss in 74 wild populations and 5 hatchery stocks in Idaho's Snake River basin at the drainage, watershed, and population spatial scales using 11 microsatellite loci. We found significant genetic diversity at multiple spatial scales. Analysis of molecular variance showed that genetic diversity was greater among watersheds within drainages (3.66%) than among

Jennifer L. Nielsen; Alan Byrne; Sara L. Graziano; Christine C. Kozfkay

2009-01-01

42

DIEL DISSOLVED OXYGEN MONITORING OF THE SPOKANE RIVER DURING EXTREME LOW FLOW. KOOTENAI COUNTY, IDAHO, 1992  

EPA Science Inventory

Diel monitoring of dissolved oxygen and temperature was conducted on an impounded and free-flowing reach of the Spokane River, in north Idaho (17010303) on 2 occasions during an extreme low flow event in water year 1992. The objective was to document excursions from water qualit...

43

Reproduction and early life history of northern squawfish, Ptychocheilus oregonensis , in Idaho's St. Joe River  

Microsoft Academic Search

Synopsis Reproduction and early life history of northern squawfish,Ptychocheilus oregonensis, was investigated in Idaho's St. Joe River from 1980–1981. Spawning occurs in large aggregations which mill near the substrate to broadcast eggs and milt. Males greatly outnumber females in the aggregations. Males mature at smaller sizes and younger ages, and exhibit slower growth and greater mortality than females, although females

Raymond C. Beamesderfer

1992-01-01

44

Evidence for Fractionation and Recharge in Shallow Basaltic Magma Chambers: Kimama Butte, Snake River Plain, Idaho  

Microsoft Academic Search

Small, monogenetic shield volcanoes are the most prominent feature of the Snake River Plain, Idaho. Even though monogenetic shields are very short lived, it is not uncommon for compositional heterogeneity to be present within a single volcano. Kimama Butte shows distinct changes in major and trace element compositions and in olivine and plagioclase from the earliest, most distal flows to

M. Hurst; E. H. Christiansen

2004-01-01

45

Extremal travel time inversion of explosion seismology data from the eastern Snake River Plain, Idaho  

Microsoft Academic Search

We have inverted travel time data from seismic refraction profiles within the Snake River Plain, a volcanic-tectonic depression in southern Idaho, for crustal and uppermost mantle compressional velocity structure. The data in the vicinity of the youngest, northeastern volcanics in Yellowstone require the presence of a significant low velocity zone in the lower crust at depths between 20 and 40

Keith Priestley; John Orcutt

1982-01-01

46

Gravity and Crustal Structure in the Western Snake River Plain, Idaho  

Microsoft Academic Search

A gravity survey was made over the western Snake River Plain, Idaho. ; The data were reduced to sea level and expressed as simple Bouguer gravity ; anomalies for an assumed density of 2.67 g\\/cm³. Three elongated, ; northwesttrending, en echelon gravity highs were defined by the survey. The ; largest high is about 150 km long and 40 km

D. P. Hill

1963-01-01

47

Characteristics and origin of Earth-mounds on the Eastern Snake River Plain, Idaho  

Microsoft Academic Search

Earth-mounds are common features on the Eastern Snake River Plain, Idaho. The mounds are typically round or oval in plan view, <0.5 m in height, and from 8 to 14 m in diameter. They are found on flat and sloped surfaces, and appear less frequently in lowland areas. The mounds have formed on deposits of multiple sedimentary environments. Those studied

Tullis

1995-01-01

48

Heat flow and seismicity patterns in the vicinity of the eastern Snake River Plain, Idaho  

Microsoft Academic Search

New heat flow data and thermal modeling are used to calculate crustal temperatures in and adjacent to the eastern Snake River Plain (SRP). The estimated crustal temperature are then used to investigate the relationship between crustal strength and the observed parabolic pattern of seismicity around the SRP. Heat flow below the SRP aquifer in deep wells on the Idaho National

Blackwell; S. A. D. D. Kelley; J. L. Steele

1993-01-01

49

Evaluate Status of Pacific Lamprey in the Clearwater River Drainage, Idaho: Annual Report 2001.  

SciTech Connect

Recent decline of Pacific lamprey Lampetra tridentata adult migrants to the Snake River drainage has focused attention on the species. Adult Pacific lamprey counted passing Ice Harbor Dam fishway averaged 18,158 during 1962-69 and 361 during 1993-2000. Human resource manipulations in the Snake River and Clearwater River drainages have altered ecosystem habitat in the last 120 years, likely impacting the productive potential of Pacific lamprey habitat. Timber harvest, stream impoundment, road construction, grazing, mining, and community development have dominated habitat alteration in the Clearwater River system and Snake River corridor. Hydroelectric projects in the Snake River corridor impact juvenile/larval Pacific lamprey outmigrants and returning adults. Juvenile and larval lamprey outmigrants potentially pass through turbines, turbine bypass/collection systems, and over spillway structures at the four lower Snake River hydroelectric dams. Clearwater River drainage hydroelectric facilities have impacted Pacific lamprey populations to an unknown degree. The Pacific Power and Light Dam on the Clearwater River in Lewiston, Idaho, restricted chinook salmon Oncorhynchus tshawytscha passage in the 1927-1940 period, altering the migration route of outmigrating Pacific lamprey juveniles/larvae and upstream adult migrants (1927-1972). Dworshak Dam, completed in 1972, eliminated Pacific lamprey spawning and rearing in the North Fork Clearwater River drainage. Construction of the Harpster hydroelectric dam on the South Fork of the Clearwater River resulted in obstructed fish passage 1949-1963. Through Bonneville Power Administration support, the Idaho Department of Fish and Game continued investigation into the status of Pacific lamprey populations in Idaho's Clearwater River drainage in 2001. Trapping, electrofishing, and spawning ground redd surveys were used to determine Pacific lamprey distribution, life history strategies, and habitat requirements in the South Fork Clearwater River drainage. Forty-three sites in Red River, South Fork Clearwater River, and their tributaries were electrofished in 2001. Sampling yielded a total of 442 juvenile/larval Pacific lamprey. Findings indicate Pacific lamprey juveniles/larvae are not numerous or widely distributed. Pacific lamprey distribution in the South Fork of the Clearwater River drainage was confined to lower reaches of Red River and the South Fork Clearwater River.

Cochnauer, Tim; Claire, Christopher

2002-12-01

50

Evaluate Status of Pacific Lamprey in the Clearwater River Drainage, Idaho : Annual Report 2000.  

SciTech Connect

Recent decline of Pacific lamprey Lampetra tridentata adult migrants to the Snake River drainage has focused attention on the species. Adult returns in 1995-1999 were more than ten magnitudes less than returns in the early 1960's. Human activities in the Snake River and Clearwater River drainages have altered ecosystem habitat in the last 100 years and likely the productive potential of Pacific lamprey habitat. Logging, stream impoundment, road construction, grazing, mining, and community development have dominated habitat alteration in the Clearwater River system and Snake River corridor. Hydroelectric projects in the Snake River corridor impact juvenile Pacific lamprey outmigrants and returning adults. Juvenile lamprey outmigrants potentially pass through turbines, turbine bypass and collection systems, and spillway structures at lower Snake River hydroelectric dams. Clearwater River drainage hydroelectric facilities including the Pacific Power and Light Dam on the Clearwater River in Lewiston, Idaho, impacted Pacific lamprey populations, however, the degree of impact is unknown (1920's-early 1970's). Hydroelectric dam construction (Harpster Dam) on the South Fork of the Clearwater River resulted in obstructed salmonid passage in the mid-1900's. Habitat alterations in the Snake River basin and Clearwater River drainage have had numerous negative effects on salmon Oncorhynchus spp. and steelhead trout O. mykiss populations (wild fish), but the magnitude of impacts on lamprey productivity and survival is unknown. Thorough understanding of Pacific lamprey habitat use and life history processes is needed to facilitate management and restoration of the species. Through Bonneville Power Administration support, the Idaho Department of Fish and Game began investigation into the status of Pacific lamprey populations in Idaho's Clearwater River drainage in 2000. Trapping, electrofishing, and spawning ground redd surveys were used to determine where Pacific lamprey persist in the South Fork of the Clearwater River drainage. Habitat surveys evaluating juvenile habitat use were primarily conducted in the Red River subbasin. Red River subbasin resource manipulations have resulted in elevated stream sediment, stream destabilization, riparian canopy reduction, and water temperature extremes. A total of 262 juvenile Pacific lamprey were captured during the 2000 field season. Sampling in the Red River drainage yielded the largest number of Pacific lamprey juveniles. Preliminary findings indicate Pacific lamprey juveniles, while present, are not numerous or widely distributed. Age of juveniles captured was determined using length frequency.

Cochnauer, Tim; Claire, Christopher

2000-01-01

51

Seismic facies, sedimentology, and significance of a lacustrine delta in Neogene Lake Idaho' deposits: Western Snake River Plain, Idaho and Oregon  

Microsoft Academic Search

The top of a buried fine-grained delta system of paleo- Lake Idaho' is detected by high-resolution seismic profiles, 300 m beneath the western Snake River Plain near Caldwell, Idaho. Characteristic 3--5[degree] dip of seismic reflectors in the prodelta-mud facies plus electrical-resistivity logs and cuttings from a 670-m well show a 150-m coarsening-upward prodelta sequence overlain by well-sorted fine sand and

Wood

1993-01-01

52

Iodine-129 in the Snake River Plain aquifer at and near the Idaho National Engineering Laboratory, Idaho, 1990-91  

USGS Publications Warehouse

From 1953 to 1990, an estimated 0.56 to 1.18 curies of iodine-129 were contained in wastewater generated by the Idaho Chemical Processing Plant (ICPP) at the Idaho National Engineering Laboratory. The waste- water was discharged directly to the Snake River Plain aquifer through a deep disposal well prior to February 1984 and through unlined disposal ponds in 1984-90. The wastewater did not contain measurable concentrations of iodine-129 in 1989-90. Samples were collected from 51 wells that obtain water from the Snake River Plain aquifer and 1 well that obtains water from a perched ground-water zone. The samples were analyzed for iodine-129 using an accelerator mass spectrometer which is two to six orders of magnitude more sensitive than neutron- activation methods. Therefore, iodine-129 was detectable in samples from a larger number of wells distributed over a larger area than previously was possible. Ground-water flow velocities calculated using iodine-129 data are estimated to be at least 6 feet per day. These velocities compare favorably with those of 4 to 10 feet per day calculated from tritium data and tracer studies at wells down- gradient from the ICPP. In 1990-91, concentrations of iodine-129 in water samples from wells that obtain water from the Snake River Plain aquifer ranged from less than 0.0000006+0.0000002 to 3.82.+0.19 picocuries per liter (pCi/L). The mean concentration in water from 18 wells was 0.81+0.19 pCi/L as compared with 1.30+0.26 pCi/L in 1986. The decrease in the iodine-l29 concentrations from 1986 to 1990-91 chiefly was the result of a decrease in the amount of iodine-129 disposed of annually, and changes in disposal techniques.

Mann, L. J.; Beasley, T. M.

1994-01-01

53

PALOUSE RIVER STUDY, LETAH COUNTY, IDAHO, WATER YEAR 1979  

EPA Science Inventory

During water year 1979, a water quality study was conducted on the Palouse River in Latah County (17060108) to determine the present water quality status of the river at Princeton and to obtain background information for the development of effluent limitations for the Hampton-Pr...

54

BOISE RIVER STUDY IN ADA COUNTY IDAHO, 1978  

EPA Science Inventory

The purpose of this study was to assess the impact of present point sources on the river and to obtain background information to develop effluent limitations for the City of Boise wastewater treatment facilities. The study was conducted on the Boise River (Ada County, ID) from L...

55

Additions and Corrections to the Bibliography of Geologic Studies, Columbia Plateau (Columbia River Besalt) and Adjacent Areas, in Idaho, 1980.  

National Technical Information Service (NTIS)

This bibliography is an update to Idaho Bureau of Mines and Geology Open-File Report 78-6, Bibliography of Geological Studies, Columbia Plateau (Columbia River Basalt Group) and adjacent areas in Idaho (also known as Rockwell Hanford Operations' contracto...

W. Strowd

1980-01-01

56

Estimation of hydraulic properties and development of a layered conceptual model for the Snake River plain aquifer at the Idaho National Engineering Laboratory, Idaho  

SciTech Connect

The Idaho INEL Oversight Program, in association with the University of Idaho, Idaho Geological Survey, Boise State University, and Idaho State University, developed a research program to determine the hydraulic properties of the Snake River Plain aquifer and characterize the vertical distribution of contaminants. A straddle-packer was deployed in four observation wells near the Idaho Chemical Processing Plant at the Idaho National Engineering Laboratory. Pressure transducers mounted in the straddle-packer assembly were used to monitor the response of the Snake River Plain aquifer to pumping at the ICPP production wells, located 2600 to 4200 feet from the observation wells. The time-drawdown data from these tests were used to evaluate various conceptual models of the aquifer. Aquifer properties were estimated by matching time-drawdown data to type curves for partially penetrating wells in an unconfined aquifer. This approach assumes a homogeneous and isotropic aquifer. The hydraulic properties of the aquifer obtained from the type curve analyses were: (1) Storativity = 3 x 10{sup -5}, (2) Specific Yield = 0.01, (3) Transmissivity = 740 ft{sup 2}/min, (4) Anisotropy (Kv:Kh)= 1:360.

Frederick, D.B.; Johnson, G.S.

1996-02-01

57

Neptunium and Plutonium Sorption to Snake River Plain, Idaho Soil  

SciTech Connect

The behavior of Np and Pu on soil collected from the subsurface disposal area at the Idaho National Engineering and Environmental Laboratory was investigated by performing short-duration, sorption experiments to measure sorption isotherms. Neptunium sorption can be described with a Freundlich isotherm; however, Pu sorption can only be described in this fashion as a conservative estimate of minimum sorption. Geochemical modeling predictions suggest that initial sorption of Np is controlled predominantly by surface complexation on clay minerals, while Pu is controlled by a competition between complexation with iron oxyhydroxides and the precipitation of hydrolysis products. Longer-term sorption is governed by the transformation of these species to oxide minerals. Solution ionic strength and carbonate alkalinity did not significantly affect Np or Pu soil sorption.

Mincher, Bruce Jay; Fox, Robert Vincent; Cooper, David Craig; Groenewold, Gary Steven

2003-07-01

58

Steelhead Supplementation in Idaho Rivers, 1993-1999 Summary Report.  

SciTech Connect

The Steelhead Supplementation Study has conducted field experiments since 1993 that assess the ability of hatchery stocks to reestablish natural populations. We have stocked hatchery adult steelhead Oncorhynchus mykiss trapped at Sawtooth Fish Hatchery in Beaver Creek yearly and Frenchman creeks when enough fish were available. We stocked Dworshak Hatchery stock fingerlings in the South Fork Red River from 1993 to 1996 and smolts in Red River from 1996 to 1999. Although results from all experiments are not complete, preliminary findings indicate that these hatchery stocks will not reestablish natural steelhead populations. We focused most of our effort on monitoring and evaluating wild steelhead stocks. We operated a temporary weir to estimate the wild steelhead escapement in Fish Creek, a tributary of the Lochsa River. We snorkeled streams to monitor juvenile steelhead abundance, captured and tagged steelhead with Passive Integrated Transponder (PIT) tags, and recorded stream temperatures in the Clearwater and Salmon River drainages. We operated screw traps in five to ten streams each year. We have documented growth rates in Fish and Gedney creeks, age of parr in Fish Creek, Gedney Creek, Lick Creek, and Rapid River, and documented parr and smolt migration characteristics. This report summarizes our effort during the years 1993 to 1999.

Byrne, Alan

2001-02-01

59

Subsurface geology of the Raft River geothermal area, Idaho  

SciTech Connect

The Raft River Valley occupies an upper Cenozoic structural basin filled with nearly 1600 m of fluvial silt, sand, and gravel. Rapid facies and thickness changes, steep initial dips (30/sup 0/C), and alteration make correlation of basin-fill depositional units very difficult. Hydrothermal alteration products in the form of clays and zeolites, and deposition of secondary calcite and silica increase with depth. The abundance of near-vertical open fractures also increases with depth, allowing greater movement of hydrothermal fluids near the base of the Cenozoic basin fill. The basin is floored with quartzites and schists that can be correlated with formations in the nearby Raft River Range. Beneath these rocks is a Precambrian adamellite basement complex. The Raft River geothermal system is a hot water convective system relying on deep circulation of meteoric water in a region of high geothermal gradients and open fractures near the base of the Tertiary basin fill.

Covington, H.R.

1980-09-01

60

Resource partitioning among forest owls in the River of No Return Wilderness, Idaho  

Microsoft Academic Search

We studied resource partitioning among the forest owls in the River of No Return Wilderness, Idaho, during the winter and spring of 1980 and 1981. The owl assemblage consisted of five abundant species: pygmy (Glaucidium gnoma), saw-whet (Aegolius acadicus), boreal (A. funereus), western screech (Otus kennicottii), and great-horned (Bubo virginianus). Long-eared (Asio otus) and flammulated (O. flammeolus) owls were rarely

G. D. Hayward; E. O. Garton

1988-01-01

61

Interpretation of electromagnetic soundings in the Raft River geothermal area, Idaho  

Microsoft Academic Search

An electromagnetic (EM) controlled source survey was conducted in the Raft River Valley, near Malta, Idaho. The purpose of the survey was: to field test U.S. Geological Survey extra-low-frequency (ELF) equipment using a grounded wire source and receiver loop configuration (which is designed to measure the vertical magnetic field (Hz) at the loop center for various frequencies); to present an

1977-01-01

62

Petrology of deep crustal xenoliths from the eastern Snake River Plain, Idaho  

Microsoft Academic Search

Xenoliths, collected from certain hybrid lava flows and vents at three localities in the eastern Snake River Plain region of southern Idaho, were derived from underlying crystal terrains which experienced granulite-facies metamorphism at approximately 3.0 AE. Lithologicaly, charnockite, opdalite, enderbite, and norite metaigneous xenoliths are predominent, but biotite-garnet gneiss and cognate noritic xenoliths derived from fractional crystallization of the host

D. J. Matty

1984-01-01

63

THE VELOCITY OF GROUND-WATER FLOW IN BASALT AQUIFERS OF THE SNAKE RIVER PLAIN, IDAHO  

Microsoft Academic Search

The maximum apparent velocity of ground-water flow in basalt aquifers beneath the eastern part of the Snake River Plain in southeastern Idaho has been measured with chemical and radioactive tracers for distances up to 3,500 feet in a single aquifer. Maximum apparent velocities observed in the single-aquifer test ranged from 24 to 141 feet per day, under hydraulic gradients of

Paul H. JONES

64

Picrite xenoliths from the eastern Snake River Plain, Idaho  

Microsoft Academic Search

Large numbers of picrite xenoliths have been found within Hell's Half Acre, a Holocene lava field of the eastern Snake River Plain. Mineralogically and chemically, they are in close agreement with expectations for fractionates and partly substantiate the hypothesis that fractionation is the primary cause of diversity among the region's tholeiite basalts. The fractionation mechanism interpreted for the picrites' origin

John F. Karlo; Charles V. Clemency

1980-01-01

65

Boise geothermal system, western Snake River plain, Idaho  

Microsoft Academic Search

The Boise geothermal system lies in an area of high heat flow along the northern margin of the western Snake River plain. Exploratory drilling for petroleum and geothermal water, seismic reflection profiling, and regional gravity data permit construction of a detailed structure section across the western plain. A faulted acoustic basement of volcanic rocks lies at depths of 2400 to

S. H. Wood; W. L. Burnham

1984-01-01

66

Conceptual Hydrogeologic Models for the Eastern Snake River Plain, Idaho  

Microsoft Academic Search

We develop two alternative conceptual hydrogeologic models of the Eastern Snake River Plain (ESRP) aquifer to explain the spatial distribution of strontium and uranium isotope data. The ESRP aquifer flows southwesterly within a northeastern trending structural basin 200 miles long and 50 to 70 miles wide. The basin is composed of 3000 to 10000 feet of Late Cenozoic basalt, eolian

E. G. Johnson; T. L. McLing; R. M. Holt

2001-01-01

67

WATER QUALITY STATUS REPORT, PALOUSE RIVER, IDAHO, 1975-1976  

EPA Science Inventory

The Palouse River (17060108) was surveyed during low and high stream flow conditions of September 1975 and April 1976. The purpose of the study was to assist in the development of effluent limitations for point sources and to identify and evaluate nonpoint sources. While water ...

68

Water-quality data for the Boise River, Boise to Star, Idaho, October to December 1987  

USGS Publications Warehouse

Chemical and physical data were collected at six and biological data at five sites on the Boise River between Veterans Memorial Parkway in Boise and Star, Idaho, from October to December 1987. Data were collected to determine the impact of sewage effluent from two Boise wastewater treatment plants on the water and biological quality of the Boise River. Similar data will be collected from January to March 1988 and will be published in a second noninterpretive report. Results of all data analyses will be discussed in a final interpretive report. (USGS)

Frenzel, S. A.; Hansen, T. F.

1988-01-01

69

Hydrologic conditions and distribution of selected radiochemical and chemical constituents in water, Snake River Plain aquifer, Idaho National Engineering Laboratory, Idaho, 1989 through 1991  

Microsoft Academic Search

Radiochemical and chemical wastewater discharged since 1952 to infiltration ponds and disposal wells at the Idaho National Engineering Laboratory (INEL) has affected water quality in the Snake River Plain aquifer. The U.S. Geological Survey, in cooperation with the U.S. Department of Energy, maintains a continuous monitoring network at the INEL to determine hydrologic trends and to delineate the movement of

R. C. Bartholomay; B. R. Orr; M. J. Liszewski; R. G. Jensen

1995-01-01

70

Bimodal basalt-rhyolite magmatism in the central and western Snake River Plain, Idaho and Oregon  

USGS Publications Warehouse

The purpose of this trip is to examine Miocene to Pleistocene basalt and rhyolite flows, ignimbrites and hypabyssal intrusions in a transect from the western Snake River Plain graben across the older part of the Snake River Plain "hot-spot-track." The earlier, dominantly explosive rhyolitic phase of volcanism will be examined primarily in the Cassia Mountains, near Twin Falls, Idaho. The second day of the field trip will focus on the Graveyard Point intrusion, a strongly differentiated diabase sill in easternmost Oregon. This late Tertiary sill is well exposed from floor to roof in sections up to 150 m thick, and is an example of the type of solidified shallow magma chamber that may be present beneath some Snake River Plain basalt volcanoes. The field trip will conclude with an examination of the diverse styles of effusive and explosive basaltic volcanism in the central and western Snake River Plain.

McCurry, M.; Bonnichsen, B.; White, C.; Godchaux, M.M.; Hughes, S.S.

1997-01-01

71

Iodine-129 in the Snake River Plain Aquifer at and Near the Idaho National Laboratory, Idaho, 2003 and 2007  

USGS Publications Warehouse

From 1953 to 1988, wastewater containing approximately 0.94 curies of iodine-129 (129I) was generated at the Idaho National Laboratory (INL) in southeastern Idaho. Almost all of this wastewater was discharged at or near the Idaho Nuclear Technology and Engineering Center (INTEC) on the INL site. Most of the wastewater was discharged directly into the eastern Snake River Plain aquifer through a deep disposal well until 1984; however, some wastewater also was discharged into unlined infiltration ponds or leaked from distribution systems below the INTEC. In 2003, the U.S. Geological Survey (USGS), in cooperation with the U.S. Department of Energy, collected samples for 129I from 36 wells used to monitor the Snake River Plain aquifer, and from one well used to monitor a perched zone at the INTEC. Concentrations of 129I in the aquifer ranged from 0.0000066 +- 0.0000002 to 0.72 +- 0.051 picocuries per liter (pCi/L). Many wells within a 3-mile radius of the INTEC showed decreases of as much as one order of magnitude in concentration from samples collected during 1990-91, and all of the samples had concentrations less than the Environmental Protection Agency's Maximum Contaminant Level (MCL) of 1 pCi/L. The average concentration of 129I in 19 wells sampled during both collection periods decreased from 0.975 pCi/L in 1990-91 to 0.249 pCi/L in 2003. These decreases are attributed to the discontinuation of disposal of 129I in wastewater after 1988 and to dilution and dispersion in the aquifer. Although water from wells sampled in 2003 near the INTEC showed decreases in concentrations of 129I compared with data collected in 1990-91, some wells south and east of the Central Facilities Area, near the site boundary, and south of the INL showed slight increases. These slight increases may be related to variable discharge rates of wastewater that eventually moved to these well locations as a mass of water from a particular disposal period. In 2007, the USGS collected samples for 129I from 36 wells that are used to monitor the aquifer south of INTEC and from 2 wells that are used to monitor perched zones at INTEC. Concentrations of 129I in the eastern Snake River Plain aquifer ranged from 0.000026 +- 0.000002 to 1.16 +- 0.04 pCi/L, and the concentration at one well exceeded the maximum contaminant level (1 pCi/L) for public drinking water supplies. The average concentration of 19 wells sampled in 2003 and 2007 did not differ; however, slight increases and decreases of concentrations in several areas around the INTEC were evident in the aquifer. The decreases are attributed to the discontinued disposal and to dilution and dispersion in the aquifer. The increases may be due to the movement into the aquifer of remnant perched water below the INTEC. In 2007, the USGS also collected samples from 31 zones in 6 wells equipped with multi-level WestbayTM packer sampling systems to help define the vertical distribution of 129I in the aquifer. Concentrations ranged from 0.000011 +- 0.0000005 to 0.0167 +- 0.0007 pCi/L. For three wells, concentrations of 129I between zones varied one to two orders of magnitude. For two wells, concentrations varied for one zone by more than an order of magnitude from the wells' other zones. Similar concentrations were measured from all five zones sampled in one well. All of the 31 zones had concentrations two or more magnitudes below the maximum contaminant level.

Bartholomay, Roy C.

2009-01-01

72

Feeding Response by Northern Squawfish to a Hatchery Release of Juvenile Salmonids in the Clearwater River, Idaho  

Microsoft Academic Search

We collected gut contents from northern squawfish Ptychocheilus oregonensis captured in the Clearwater River, Idaho, 0–6 km from its confluence with the Snake River, following the release of 1.1 million yearling chinook salmon Oncorhynchus tshawytscha from the Dworshak National Fish Hatchery. Before the hatchery release, northern squawfish gut contents (by weight) in the study area were 38% crayfish Pacifastacus spp.,

Rip S. Shively; Thomas P. Poe; Sally T. Sauter

1996-01-01

73

Compressional Wave Velocity Structure of the Upper 350 km Under the Eastern Snake River Plain Near Rexburg, Idaho  

Microsoft Academic Search

Relative travel time residuals for teleseismic P and PKIKP are used to determine the compressional velocity structure under the eastern Snake River Plain at Rexburg, Idaho. Damped least squares inversion of travel time residuals (modified from the method of Aki) indicates a large body of 3.5 +2.5% low relative velocity material centered under the northwest edge of the Snake River

John R. Evans

1982-01-01

74

LOWER COEUR D'ALENE RIVER, IDAHO. TOXICITY AND BIOAVAILABILITY STUDIES OF LEAD AND OTHER ELEMENTS, 1989  

EPA Science Inventory

This study was done following reported high waterfowl deaths and illnesses in the Coeur dAlene River and Lake system, Idaho (17010301, 17010303). Abundant evidence documents extensive contamination of the Lower Coeur dAlene River drainage with mining and milling wastes. The dep...

75

Fault and joint geometry at Raft River geothermal area, Idaho  

SciTech Connect

Raft River geothermal reservoir is formed by fractures in sedimentary strata of the Miocene and Pliocene Salt Lake Formation. The fracturing is most intense at the base of the Salt Lake Formation, along a decollement that dips eastward at less than 5/sup 0/ on top of metamorphosed Precambrian and Lower Paleozoic rocks. Core taken from less than 200 m above the decollement contains two sets of normal faults. The major set of faults dips between 50/sup 0/ and 70/sup 0/. These faults occur as conjugate pairs that are bisected by vertical extension fractures. The second set of faults dips 10/sup 0/ to 20/sup 0/ and may parallel part of the basal decollement or reflect the presence of listric normal faults in the upper plate. Surface joints form two suborthogonal sets that dip vertically. East-northeast-striking joints are most frequent on the limbs of the Jim Sage anticline, a large fold that is associated with the geothermal field. The north-trending joint set is prominent in the fold's hinge. Surface joint intensity decreases in proximity to known faults, indicating that surface joint intensity mapping may be useful for locating the surface traces of faults in the reservoir.

Guth, L.R.; Bruhn, R.L.; Beck, S.L.

1981-07-01

76

Historical and current perspectives on fish assemblages of the Snake River, Idaho and Wyoming  

USGS Publications Warehouse

The Snake River is the tenth longest river in the United States, extending 1,667 km from its origin in Yellowstone National Park in western Wyoming to its union with the Columbia River at Pasco, Washington. Historically, the main-stem Snake River upstream from the Hells Canyon Complex supported at least 26 native fish species, including anadromous stocks of Chinook salmon Oncorhynchus tshawytscha, steelhead O. mykiss, Pacific lamprey Lampetra tridentata, and white sturgeon Acipenser transmontanus. Of these anadromous species, only the white sturgeon remains in the Snake River between the Hells Canyon Complex and Shoshone Falls. Today, much of the Snake River has been transformed into a river with numerous impoundments and flow diversions, increased pollutant loads, and elevated water temperatures. Current (1993-2002) fish assemblage collections from 15 sites along the Snake River and Henrys Fork contained 35 fish species, including 16 alien species. Many of these alien species such as catfish (Ictaluridae), carp (Cyprinidae), and sunfish (Centrarchidae) are adapted for warmwater impounded habitats. Currently, the Snake River supports 19 native species. An index of biotic integrity (IBI), developed to evaluate large rivers in the Northwest, was used to evaluate recent (1993-2002) fish collections from the Snake River and Henrys Fork in southern Idaho and western Wyoming. Index of biotic integrity site scores and component metrics revealed a decline in biotic integrity from upstream to downstream in both the Snake River and Henrys Fork. Two distinct groups of sites were evident that correspond to a range of IBI scores-an upper Snake River and Henrys Fork group with relatively high biotic integrity (mean IBI scores of 46-84) and a lower Snake River group with low biotic integrity (mean IBI scores of 10-29). Sites located in the lower Snake River exhibited fish assemblages that reflect poor-quality habitat where coldwater and sensitive species are rare or absent, and where tolerant, less desirable species predominate. Increases in percentages of agricultural land, total number of diversions, and number of constructed channels were strongly associated with these decreasing IBI scores.

Maret, T.R.; Mebane, C.A.

2005-01-01

77

Seismic imaging through volcanic rocks of the Snake River Plain, Idaho for the ICDP Project Hotspot  

NASA Astrophysics Data System (ADS)

New high-resolution downhole and surface seismic reflection data tied to drill holes related to the Snake River Geothermal Drilling Project (ICDP Project Hotspot) provide insights into seismic imaging in volcanic terranes. The downhole data at the Kimberly and Kimama drill sites in southern Idaho show low seismic attenuation and large seismic velocity contrasts at volcanic flow boundaries. These lithologic and seismic boundaries tie to reflections in both borehole and surface seismic images. The Kimberly site drilled through 1,958 m of mostly rhyolite, with thin sedimentary interbeds throughout the section. Sedimentary interbeds at depth correspond with slow velocity zones that relate to reflections on surface seismic profiles. The reflection observed on 360-channel vibroseis seismic profiles that relates to a flow boundary at 300-400 m depth increases in depth with increasing elevation away from the Kimberly drill site, suggesting flow volumes may be estimated with surface seismic methods. The Kimama site drilled through 1,912 m of mostly basalt with sedimentary interbeds at depth. Downhole and surface vibroseis seismic results here also suggest seismic reflection methods are useful to image flow boundaries. Ongoing drilling at a third site in Mountain Home, Idaho will tie lithologies and measured physical properties to surface seismic data. These seismic data show key lithologic boundaries related to Quaternary basalts, lake sediments related to paleo Lake Idaho, and underlying Tertiary basalts. Ongoing analysis should help clarify the limits and capabilities of surface seismic imaging in volcanic terranes.

Liberty, L. M.; Schmitt, D. R.; Shervais, J. W.

2011-12-01

78

Iodine-129 in the eastern Snake River Plain aquifer at and near the Idaho National Laboratory, Idaho, 2010-12  

USGS Publications Warehouse

From 1953 to 1988, approximately 0.941 curies of iodine-129 (129I) were contained in wastewater generated at the Idaho National Laboratory (INL) with almost all of this wastewater discharged at or near the Idaho Nuclear Technology and Engineering Center (INTEC). Most of the wastewater containing 129I was discharged directly into the eastern Snake River Plain (ESRP) aquifer through a deep disposal well until 1984; lesser quantities also were discharged into unlined infiltration ponds or leaked from distribution systems below the INTEC. During 2010–12, the U.S. Geological Survey in cooperation with the U.S. Department of Energy collected groundwater samples for 129I from 62 wells in the ESRP aquifer to track concentration trends and changes for the carcinogenic radionuclide that has a 15.7 million-year half-life. Concentrations of 129I in the aquifer ranged from 0.0000013±0.0000005 to 1.02±0.04 picocuries per liter (pCi/L), and generally decreased in wells near the INTEC, relative to previous sampling events. The average concentration of 129I in groundwater from 15 wells sampled during four different sample periods decreased from 1.15 pCi/L in 1990–91 to 0.173 pCi/L in 2011–12. All but two wells within a 3-mile radius of the INTEC showed decreases in concentration, and all but one sample had concentrations less than the U.S. Environmental Protection Agency maximum contaminant level of 1 pCi/L. These decreases are attributed to the discontinuation of disposal of 129I in wastewater and to dilution and dispersion in the aquifer. The decreases in 129I concentrations, in areas around INTEC where concentrations increased between 2003 and 2007, were attributed to less recharge near INTEC either from less flow in the Big Lost River or from less local snowmelt and anthropogenic sources. Although wells near INTEC sampled in 2011–12 showed decreases in 129I concentrations compared with previously collected data, some wells south and east of the Central Facilities Area, near the site boundary, and south of the INL showed small increases. These slight increases are attributed to variable discharge rates of wastewater that eventually moved to these well locations as a pulse of water from a particular disposal period. Wells sampled for the first time around the Naval Reactors Facility had 129I concentrations slightly greater than background concentrations in the ESRP aquifer. These concentrations are attributed to possible leakage from landfills at the Naval Reactors Facility or seepage from air emission deposits from INTEC, or both. In 2012, the U.S. Geological Survey collected discrete groundwater samples from 25 zones in 11 wells equipped with multilevel monitoring systems to help define the vertical distribution of 129I in the aquifer. Concentrations ranged from 0.000006±0.000004 to 0.082±0.003 pCi/L. Two new wells completed in 2012 showed variability of up to one order of magnitude of concentrations of 129I among various zones. Two other wells showed similar concentrations of 129I in all three zones sampled. Concentrations were well less than the maximum contaminant level in all zones.

Bartholomay, Roy C.

2013-01-01

79

Lu-Hf garnet geochronology of the Salmon River Suture Zone, West-Central Idaho  

NASA Astrophysics Data System (ADS)

The Salmon River Suture Zone (SRSZ) in west-central Idaho records the accretion of island arc terranes to North America. It is modified by the Western Idaho Shear Zone (WISZ), a high strain zone within the SRSZ, which defines the present-day boundary between old continental North America and the accreted oceanic assemblages. Timing of the onset of deformation on the WISZ is not well established, primarily due to a poorly constrained metamorphic history. Existing garnet geochronologic studies of units within the SRSZ, using the Sm-Nd isotope system, have provided a framework towards a progressive accretion of arc-derived rocks to North America [1,2]. In this study, we report on the application of the Lu-Hf isotope system to provide ages of garnet growth within the suture zone. This system has the advantage of being insensitive to light rare earth element (LREE)-rich inclusions in garnet, which can complicate Sm-Nd geochronology. Samples were taken from several locations from both along and perpendicular to the suture zone. We report results on two of these samples, within and east of the WISZ. First, a garnet bearing leucocratic layer in a gneissic meta-sedimentary screen near Cascade, Idaho, yields a garnet age of 98 ± 2.0 Ma (2SD). The screen occurs completely within the orthogneisses of the WISZ, and displays similar fabrics and kinematics. Second, a biotite quartzo-feldspathic garnet gneiss from Elk City, Idaho, yields an age 100 ± 2.9 Ma (2SD). This location is ~35 km east of the WISZ, on a sub-parallel deformation zone that was active at the same time. Both samples were single-stage garnet fractions consisting of inclusion-free to inclusion-bearing fragments and whole rock pairs. These ages provide two important implications for the Mesozoic evolution of the western edge of North America. First, transpressional deformation in the WISZ occurred simultaneously with deformation on parallel structures in central Idaho, indicating that a wide zone of deformation occurred on North America (and was intruded and thus obscured by the younger Idaho batholith). Second, deformation on these structures occurred during a limited time interval in the mid-Cretaceous, with peak metamorphism at ~100 Ma. [1] Getty et al., 1993, Contrib. Mineral. Petrol, v. 115, p. 45-57. [2] McKay et al., 2011, GSA Abstr w Prog., 2011 Rocky Mountain-Cordilleran section meeting, Paper No. 26-2.

Wilford, D. E.; Vervoort, J. D.; Lewis, R.; Tikoff, B.

2011-12-01

80

Hydrologic conditions and distribution of selected radiochemical and chemical constituents in water, Snake River Plain aquifer, Idaho National Engineering Laboratory, Idaho, 1992 through 1995  

SciTech Connect

Radiochemical and chemical wastewater discharged since 1952 to infiltration ponds and disposal wells at the Idaho National Engineering Laboratory (INEL) has affected water quality in the Snake River Plain aquifer. The US Geological Survey, in cooperation with the US Department of Energy, maintains a monitoring network at the INEL to determine hydrologic trends and to delineate the movement of radiochemical and chemical wastes in the aquifer. This report presents an analysis of water-level and water-quality data collected from the Snake River Plain aquifer during 1992--95.

Bartholomay, R.C.; Tucker, B.J.; Ackerman, D.J.; Liszewski, M.J.

1997-04-01

81

Geothermal alteration of basaltic core from the Snake River Plain, Idaho  

NASA Astrophysics Data System (ADS)

The Snake River Plain is located in the southern part of the state of Idaho. The eastern plain, on which this study focuses, is a trail of volcanics from the Yellowstone hotspot. Three exploratory geothermal wells were drilled on the Snake River Plain. This project analyzes basaltic core from the first well at Kimama, north of Burley, Idaho. The objectives of this project are to establish zones of geothermal alteration and analyze the potential for geothermal power production using sub-aquifer resources on the axial volcanic zone of the Snake River Plain. Thirty samples from 1,912 m of core were sampled and analyzed for clay content and composition using X-ray diffraction. Observations from core samples and geophysical logs are also used to establish alteration zones. Mineralogical data, geophysical log data and physical characteristics of the core suggest that the base of the Snake River Plain aquifer at the axial zone is located 960 m below the surface, much deeper than previously suspected. Swelling smectite clay clogs pore spaces and reduces porosity and permeability to create a natural base to the aquifer. Increased temperatures favor the formation of smectite clay and other secondary minerals to the bottom of the hole. Below 960 m the core shows signs of alteration including color change, formation of clay, and filling of other secondary minerals in vesicles and fractured zones of the core. The smectite clay observed is Fe-rich clay that is authigenic in some places. Geothermal power generation may be feasible using a low temperature hot water geothermal system if thermal fluids can be attained near the bottom of the Kimama well.

Sant, Christopher J.

82

Geophysical logging case history of the Raft River geothermal system, Idaho  

SciTech Connect

Drilling to evaluate the geothermal resource in the Raft River Valley began in 1974 and resulted in the discovery of a geothermal reservoir at a depth of approximately 1523 m (500 ft). Several organizations and companies have been involved in the geophysical logging program. There is no comprehensive report on the geophysical logging, nor has there been a complete interpretation. The objectives of this study are to make an integrated interpretation of the available data and compile a case history. Emphasis has been on developing a simple interpretation scheme from a minimum of data sets. The Raft River geothermal system occurs in the Raft River Valley, which is a portion of the Basin and Range geomorphic province located in south central Idaho, south of the Snake River Plain. The valley is a late Cenozoic structural downwarp bounded by faults on the west, south, and east. The downwarp is filled with Tertiary and Paleozoic sediments, metasediments, and volcanics that overlie Precambrian rocks. The variety of rock types, the presence of alteration products, and the variability of fracturing make reliable interpretations difficult. However, the cross plotting of various parameters has allowed a determination of rock types and an analysis of the degree of alteration and the density of fractures. Thus, one can determine the relevant data necessary to assess a geothermal reservoir in similar rock types and use cross plots to potentially define the producing zones.

Applegate, J.K.; Moens, T.A.

1980-04-01

83

A statistical model for estimating stream temperatures in the Salmon and Clearwater River basins, central Idaho  

USGS Publications Warehouse

A water-quality standard for temperature is critical for the protection of threatened and endangered salmonids, which need cold, clean water to sustain life. The Idaho Department of Environmental Quality has established temperature standards to protect salmonids, yet little is known about the normal range of temperatures of most Idaho streams. A single temperature standard for all streams does not take into account the natural temperature variation of streams or the existence of naturally warm waters. To address these issues and to help the Idaho Department of Environmental Quality revise the existing State temperature standards for aquatic life, temperature data from more than 200 streams and rivers in the salmon and Clearwater River Basins were collected. From these data, a statistical model was developed for estimating stream temperatures on the basis of subbasin and site characteristics and climatic factors. Stream temperatures were monitored hourly for approximately 58 days during July, August, and September 2000 at relatively undisturbed sites in subbasins in the Salmon and Clearwater River Basins in central Idaho. The monitored subbasins vary widely in size, elevation, drainage area, vegetation cover, and other characteristics. The resulting data were analyzed for statistical correlations with subbasin and site characteristics to establish the most important factors affecting stream temperature. Maximum daily average stream temperatures were strongly correlated with elevation and total upstream drainage area; weaker correlations were noted with stream depth and width and aver-age subbasin slope. Stream temperatures also were correlated with certain types of vegetation cover, but these variables were not significant in the final model. The model takes into account seasonal temperature fluctuations, site elevation, total drainage area, average subbasin slope, and the deviation of daily average air temperature from a 30-year normal daily average air temperature. The goodness-of-fit of the model varies with day of the year. Overall, temperatures can be estimated with 95-percent confidence to within approximately plus or minus 4 degrees Celsius. The model performed well when tested on independent stream-temperature data previously collected by the U.S. Geological Survey and other agencies. Although the model provides insight into the natural temperature potential of a wide variety of streams and rivers in the Salmon and Clearwater River Basins, it has limitations. It is based on data collected in only one summer, during which temperatures were higher and streamflows were lower than normal. The effects of changes in streamflow on the effectiveness of the model are not known. Because the model is based on data from minimally disturbed or undisturbed streams, it should not be applied to streams known to be significantly affected by human activities such as disturbance of the streambed, diversion and return of water by irrigation ditches, and removal of riparian vegetation. Finally, because the model is based on data from streams in the Salmon and Clearwater River Basins and reflects climatological and landscape characteristics of those basins, it should not be applied to streams outside this region.

Donato, Mary M.

2002-01-01

84

Reevalution of background iodine-129 concentrations in water from the Snake River Plain Aquifer, Idaho, 2003  

USGS Publications Warehouse

Background concentrations of iodine-129 (129I, half-life = 15.7 million years) resulting from natural production in the earth?s atmosphere, in situ production in the earth by spontaneous fission of uranium-238(238U), and fallout from nuclear weapons tests conducted in the 1950s and 1960s were reevaluated on the basis of 52 analyses of ground- and surface-water samples collected from the eastern Snake River Plain in southeastern Idaho. The background concentration estimated using the results of a subset of 30 ground-water samples analyzed in this reevaluation is 5.4 attocuries per liter (aCi/L; 1 aCi = 10-18 curies) and the 95-percent nonparametric confidence interval is 5.2 to 10.0 aCi/L. In a previous study, a background 129I concentration was estimated on the basis of analyses of water samples from 16 sites on or tributary to the eastern Snake River Plain. At the 99-percent confidence level, background concentrations of 129I in that study were less than or equal to 8.2 aCi/L. During 1993?94, 34 water samples from 32 additional sites were analyzed for 129I to better establish the background concentrations in surface and ground water from the eastern Snake River Plain that is presumed to be unaffected by wastedisposal practices at the Idaho National Engineering and Environmental Laboratory (INEEL). Surface water contained larger 129I concentrations than water from springs and wells contained. Because surface water is more likely to be affected by anthropogenic fallout and evapotranspiration, background 129I concentrations were estimated in the current research using the laboratory results of ground-water samples that were assumed to be unaffected by INEEL disposal practices.

Cecil, L. DeWayne; Hall, L. Flint; Green, Jaromy R.

2003-01-01

85

Lead in hawks, falcons and owls downstream from a mining site on the Coeur d'Alene River, Idaho  

Microsoft Academic Search

Mining and smelting at Kellogg-Smelterville, Idaho, resulted in high concentrations of lead in Coeur d'Alene (CDA) River sediments and the floodplain downstream, where American Kestrels (Falco sparverius), Northern Harriers (Circus cyaneus), Red-tailed Hawks (Buteo jamaicensis), Great Horned Owls (Bubo virginianus), and Western Screech-owls (Otus kennicotti) nested. Nestling American Kestrels contained significantly higher (P=0.0012) blood lead concentrations along the CDA River

Charles J. Henny; Lawrence J. Blus; David J. Hoffman; Robert A. Grove

1994-01-01

86

Lead accumulation and osprey production near a mining site on the coeur d'Alene River, Idaho  

Microsoft Academic Search

Mining and smelting at Kellogg-Smelterville, Idaho, resulted in high concentrations of lead in Coeur d'Alene (CDA) River sediments 15–65 km downstream, where ospreys (Pandion haliaetus) nested. Adult and nestling ospreys living along the CDA River had significantly higher blood lead concentrations than those at Lake Coeur d'Alene (intermediate area) or Pend Oreille and Flathead Lakes (reference areas). Lead concentrations in

Charles J. Henny; Lawrence J. Blus; David J. Hoffman; Robert A. Grove; Jeff S. Hatfield

1991-01-01

87

Pesticide and PCB residues in the upper Snake River ecosystem, Southeastern Idaho, following the collapse of the Teton Dam 1976  

Microsoft Academic Search

The Teton Dam in Southeastern Idaho collapsed on June 5, 1976. The resulting flood damaged a large area and caused the release of toxicants into the Snake River. A pesticide recovery team in a helicopter worked the flooded area for three weeks and collected 1,104 containers, about 35% of which contained toxicants. It was estimated that less than 60% of

J. A. Perry

1979-01-01

88

Changes in Salmon Spawning and Rearing Habitat from Increased Delivery of Fine Sediment to the South Fork Salmon River, Idaho  

Microsoft Academic Search

Levels of surface and subsurface fine sediment (<4.75 mm in diameter) were measured annually from 1965 to 1985 in spawning and rearing areas for chinook salmon Oncorhynchus tschawytscha and steelhead O. mykiss (formerly Salmo gairdneri) in the South Fork Salmon River, Idaho. Between 1950 and 1965, logging and road construction, in combination with large storm events of 1964 and 1965,

William S. Platts; Richard J. Torquemada; Michael L. McHenry; Charles K. Graham

1989-01-01

89

Summer Use of Side-Channel Thermal Refugia by Salmonids in the North Fork Coeur d’Alene River, Idaho  

Microsoft Academic Search

We observed aggregations of westslope cutthroat trout Oncorhynchus clarkii lewisi, mountain whitefish Prosopium williamsoni, and to a lesser extent, rainbow trout Oncorhynchus mykiss moving into cold side channels in the North Fork Coeur d’Alene River in northern Idaho during the summer of 2007. The use of cold side channels varied throughout the season, as well as by size-class. Such use

Bryan S. Stevens; Joseph M. DuPont

2011-01-01

90

Home Range Size and Foraging Ecology of Bull Trout and Westslope Cutthroat Trout in the Upper Salmon River Basin, Idaho  

Microsoft Academic Search

We used radiotelemetry to determine how body size, foraging ecology, and seasonal activity influence the home range size of adult bull trout Salvelinus confluentus and westslope cutthroat trout Oncorhynchus clarkii lewisi in the upper Salmon River basin of central Idaho. Stomach samples were collected to determine diet composition and compare foraging strategies between the two species. Contrary to other studies

Gregory P. Schoby; Ernest R. Keeley

2011-01-01

91

Soil gases associated with rift zones in the Eastern Snake River Plain, Idaho, U.S.A  

Microsoft Academic Search

Soil gases have been measured, utilizing petroleum nearsurface exploration techniques, in the volcanic province of the Eastern Snake River Plain, In Idaho, U.S.A. The analyses of the soil atmosphere included light hydrocarbon gases, helium, hydrogen, and carbon dioxide. Samples were collected in and near recent basaltic rift zones. Characterization of rift zone soil gases has indicated variability of their compositional

W. C. Sidle

1984-01-01

92

Assessing the accuracy of thermoluminescence for dating baked sediments beneath late Quaternary lava flows, Snake River Plain, Idaho  

Microsoft Academic Search

Baked sediments beneath lava flows on the Snake River Plain, Idaho, with independent age control by either C-14 or K\\/Ar dating were analyzed to evaluate the accuracy of the thermoluminescence (TL) technique. The age of flows ranges from approx. 2 to 100 ka and multiple TL analyses by the total bleach method yielded ages that overlap at one sigma with

Steven L. Forman; James Pierson; R. P. Smith; W. R. Hackett; G. Valentine

1994-01-01

93

Reproductive Ecology of the Sage Thrasher (Oreoscoptes montanus) on the Snake River Plain in South-central Idaho  

Microsoft Academic Search

The Sage Thrasher (Oreoscoptes montanus) is an abundant and conspicuous breeding species through- out the Snake River Plain in south-central Idaho. The paucity of literature regarding this species reflects a lack of interest in this habitat, rather than indicating the Sage Thrasher's abundance or ease with which it may be studied. No published data on incubation time, nesting success, nesting

TIMOTHY D. REYNOLDS; TERRELL D. RtCH

94

Rivers  

NSDL National Science Digital Library

This video segment from IdahoPTV's D4K takes you on a trip down Idaho's Snake River near 1000 Springs and Blur Heart Springs while it explains how rivers are formed, their uses, and how they make valleys, canyons and even plains.

Ptv, Idaho

2011-09-04

95

Effects of Climate Change on White-Water Recreation on the Salmon River, Idaho  

NASA Astrophysics Data System (ADS)

White-water recreation on the Salmon River generates tens of millions of dollars each summer for central Idaho's economy. This tourism revenue is highly dependent on a healthy snowpack melting throughout the summer to meet minimum streamflow requirements for the rafting industry. A number of previous studies have shown that in a warming climate this vital snowpack will diminish and so will summer streamflows. In areas such as the Middle Fork of the Salmon River this will result in less streamflow in July and August, which are the critical months for the rafting industry. Current estimates approximate that eight percent of scheduled trips are canceled due to low summer streamflows. In this study we project future impacts to white-water recreation in the Salmon River basin, associated with an ensemble of climate change scenarios. The University of Washington's Climate Impacts Group has statistically downscaled 20 GCMs A1B and B1 climate change scenarios from the IPCC 2007 Report. We use these forcings to run the Variable Infiltration Capacity (VIC) land-surface model to determine future streamflows for the Pacific Northwest. To verify the likelihood of non-boatable days in the future due to low summer streamflows, we compare this suite of projected results for the Salmon River streamflow to historical streamflows for the Middle Fork and Main Fork Salmon. Preliminary analysis shows a two degree Celsius increase could result in a twenty-five percent cancellation of future Middle Fork trips as a result of low summer streamflows. On the Middle Fork section alone this translates into a two million dollar loss in annual revenue generation for the rafting industry, with impacts stretching deeper into the economy. We also discuss additional costs to the users, the tourist economy and potential analysis for other river systems.

Mickelson, K. E.; Hamlet, A. F.

2008-12-01

96

Bedrock erosion in the lower Big Wood River channel, southcentral Idaho  

SciTech Connect

The Big Wood River, which is fed from the mountains to the north of the Snake River Plain, cuts through 0.8 m.y. old basalt in an area north and east of Shoshone, Idaho. The basalt channel carved by the Big Wood River exhibits remarkable and unusual bedrock erosional features. Approximately 10,000 years ago, nearby Black Butte shield volcano erupted basaltic lave which rerouted the Big Wood River. At the time the new river channel formed 10,000 years ago, alpine glaciers in the mountains were also beginning to melt. High flows of water from the melting glaciers during the next few thousand years carried large sediment loads and were instrumental in developing the spectacular potholes now found in the channel. Most of the scouring agents are pebbles and cobbles derived from quartzite, granitic, and gneissic rocks. As potholes began to develop, they were closely spaced and generally less than 1 m apart. However, as the potholes enlarged and expanded both horizontally and vertically, they coalesced with one another. The merging process occurred when the walls of two or more adjacent potholes were breached by the outward expansion of each pothole. The deeper of the two potholes captured the pebbles of the adjacent pothole. When pebbles are captured, pothole growth is terminated and the more shallow pothole was gradually cannibalized. All of the features within the channel are overprinted with a strong asymmetry caused by the current-driven pebbles against the upstream side of the features. Consequently, the upstream side of the features tends to be smooth, convex and rounded; whereas, the downstream side tends to be concave with the leading edge of the feature pointing in the downstream direction.

Maley, T.S.; Oberlindacher, P. (Bureau of Land Management, Boise, ID (United States))

1993-04-01

97

Hydrothermal Injection Program: Raft River (KGRA) Idaho, 1982 test data index  

SciTech Connect

Presented is an index for the Hydrothermal Injection Program test data collected over a three-month testing and monitoring period, starting September 1, 1982 at the Raft River Geothermal Site located in Southern Idaho. The test program consisted of injecting tracer solutions into a geothermal well, and the withdrawing the fluid from the same well, either immediately, or after a quiescent period. These data, stored on tape at the National Technical Information Service (NTIS), US Department of Commerce, Springfield, Virginia, consist of concentrations of injected tracer solutions, natural water chemistry, wellhead temperature, pressure and flow, downhole temperature and conductivity, caliper and spinner data along with wellhead pressure responses of the monitoring wells. The stored data have been screened to ensure that they are reasonable and internally consistent.

Freiburger, R.M.; Hull, L.C.; Clemo, T.M.

1985-04-01

98

Simulation analysis of the unconfined aquifer, Raft River geothermal area, Idaho-Utah  

USGS Publications Warehouse

This study covers about 1,000 mi2 (2,600 km2) of the southern Raft River drainage basin in south-central Idaho and northwest Utah. The main area of interest, approximately 200 mi 2 (520 km2) of semiarid agricultural and rangeland in the southern Raft River Valley that includes the known Geothermal Resource Area near Bridge, Idaho, was modelled numerically to evaluate the hydrodynamics of the unconfined aquifer. Computed and estimated transmissivity values range from 1,200 feet squared per day (110 meters squared per day) to 73,500 feet squared per day (6,830 meters squared per day). Water budgets, including ground-water recharge and discharge for approximate equilibrium conditions, have been computed by several previous investigators; their estimates of available ground-water recharge range from about 46,000 acre-feet per year (57 cubic hectometers per year) to 100,000 acre-feet per year (123 cubic hectometers per year). Simulation modeling of equilibrium conditions represented by 1952 water levels suggests: (1) recharge to the water-table aquifer is about 63,000 acre-feet per year (77 cubic hectometers per year); (2) a significant volume of ground water is discharged through evapotranspiration by phreatophytes growing on the valley bottomlands; (3) the major source of recharge may be from upward leakage of water from a deeper, confined reservoir; and (4) the aquifer transmissivity probably does not exceed about 12,000 feet squared per day (3,100 meters squared per day). Additional analysis carried out by simulating transient conditions from 1952 to 1965 strongly suggests that aquifer transmissivity does not exceed about 7,700 feet squared per day (700 meters squared per day). The model was calibrated using slightly modified published pumpage data; it satisfactorily reproduced the historic water-level decline over the period 1952-65.

Nichols, William D.

1979-01-01

99

Digital Map of Surficial Geology, Wetlands, and Deepwater Habitats, Coeur d'Alene River Valley, Idaho  

USGS Publications Warehouse

The Coeur d'Alene (CdA) River channel and its floodplain in north Idaho are mostly covered by metal-enriched sediments, partially derived from upstream mining, milling and smelting wastes. Relative to uncontaminated sediments of the region, metal-enriched sediments are highly enriched in silver, lead, zinc, arsenic, antimony and mercury, copper, cadmium, manganese, and iron. Widespread distribution of metal-enriched sediments has resulted from over a century of mining in the CdA mining district (upstream), poor mine-waste containment practices during the first 80 years of mining, and an ongoing series of over-bank floods. Previously deposited metal-enriched sediments continue to be eroded and transported down-valley and onto the floodplain during floods. The centerpiece of this report is a Digital Map Surficial Geology, Wetlands and Deepwater Habitats of the Coeur d'Alene (CdA) River valley (sheets 1 and 2). The map covers the river, its floodplain, and adjacent hills, from the confluence of the North and South Forks of the CdA River to its mouth and delta front on CdA Lake, 43 linear km (26 mi) to the southwest (river distance 58 km or 36 mi). Also included are the following derivative theme maps: 1. Wetland System Map; 2. Wetland Class Map; 3. Wetland Subclass Map; 4. Floodplain Map; 5. Water Regime Map; 6. Sediment-Type Map; 7. Redox Map; 8. pH Map; and 9. Agricultural Land Map. The CdA River is braided and has a cobble-gravel bottom from the confluence to Cataldo Flats, 8 linear km (5 mi) down-valley. Erosional remnants of up to four alluvial terraces are present locally, and all are within the floodplain, as defined by the area flooded in February of 1996. High-water (overflow) channels and partly filled channel scars braid across some alluvial terraces, toward down-valley marshes and (or) oxbow ponds, which drain back to the river. Near Cataldo Flats, the river gradient flattens, and the river coalesces into a single channel with a large friction-dominated central sand bar at Cataldo Landing. Metal-enriched sediments that were dredged from the central sand bar were deposited on Cataldo Flats, to form extensive dredge-spoil deposits. From the central sand bar to CdA Lake, thick deposits of metal-enriched sand partially fill the middle of the pre-mining-era channel along straight reaches, and form point-bars along the inside margins of meander bends. Metal-enriched sand and silt form oxidized bank-wedge deposits along riverside margins of pre-mining-era levees of gray silty mud. Metal-enriched levee sand deposits extend across bank wedges and natural levees, generally thinning and fining away from the river, toward lateral marshes and lakes, where dark gray metal-enriched silt and mud overlie silty peat, deposited before the mining era. Distributary streams and man-made canals locally diverge from the river, connecting it to lateral marshes and lakes, and metal-enriched sand splays locally fan out across the floodplain. At the mouth of the river, a bouyancy-dominated river-mouth bar crests beyond the ends of the emergent levees. Thick delta-front deposits of metal-enriched sand slope from the river-mouth bar to the bottom of CdA Lake.

Bookstrom, Arthur A.; Box, Stephen E.; Jackson, Berne L.; Brandt, Theodore R.; Derkey, Pamela D.; Munts, Steven R.

1999-01-01

100

Petrophysical characteristics of basalt in the vadose zone, Idaho National Engineering Laboratory, Eastern Snake River Plain, Idaho  

Microsoft Academic Search

We have used a core characterization system to measure bulk densities, porosities, and permeabilities of basalt lavas from the vadose zone at the Idaho National Engineering Laboratory (INEL). At the INEL, basalt lava flows with intercalated alluvial, aeolian, and lacustrine sediments extend to depths of one kilometer or more. Individual lava flows are generally less than 15 meters thick and

C. F. Knutson; W. E. Harrison; R. P. Smith

1989-01-01

101

Can superior natural amenities create high-quality employment opportunities? The case of nonconsumptive river recreation in central Idaho  

USGS Publications Warehouse

Central Idaho has superior environmental amenities, as evidenced by exceptionally high-value tourism, such as guided whitewater rafting. The focus of our study concerns the attainment of high-quality jobs in a high-quality natural environment. We estimate cumulative wage rate effects unique to nonconsumptive river recreation in central Idaho for comparison with other sectors. The cumulative effects are based on a detailed survey of recreation spending and a modified synthesized input-output model. Cumulative wage rate effects support using the abundance of environmental amenities to expand and attract high-wage, environmentally sensitive firms, as opposed to expanded tourism to improve employment quality. Copyright ?? 2005 Taylor & Francis Inc.

McKean, J.R.; Johnson, D.M.; Johnson, R.L.; Taylor, R.G.

2005-01-01

102

Geologic map and profiles of the north wall of the Snake River Canyon, Thousand Springs and Niagara quadrangles, Idaho  

USGS Publications Warehouse

The Snake River Plain is a broad, arcuate region of low relief that extends more than 300 mi across southern Idaho. The Snake River enters the plain near Idaho Falls and flows westward along the southern margin of the eastern Snake River Plain (fig. 1), a position mainly determined by the basaltic lava flows that erupted near the axis of the plain. The highly productive Snake River Plain aquifer north of the Snake River underlies most of the eastern plain. The aquifer is composed of basaltic rocks that are interbedded with fluvial and lacustrine sedimentary rocks. The top of the aquifer (water table) is typically less than 500 ft below the land surface but is deeper than 1,000 ft in a few areas. The Snake River has excavated a canyon into the nearly flat lying basaltic and sedimentary rocks of the eastern Snake River Plain aquifer, which discharges from the northern canyon wall as springs of variable size, spacing, and altitude. Geologic controls on springs are of importance because nearly 60 percent of the aquifer's discharge occurs as spring flow along the describes the geologic occurrence of springs along the northern wall of the Snake River canyon. This report is one of several that describes the geologic occurrence of springs along the northern wall of the Snake River canyon from Milner Dam to King Hill. To understand the local geologic controls on springs, the Water Resources Division of the U.S. Geological Survey initiated a geologic mapping project as part of their Snake River Plain Regional Aquifer System-Analysis Program. Objectives of the project were (1) to prepare a geologic map of a strip of land immediately north of the Snake River canyon, (2) to map the geology of the north canyon wall in profile, (3) to locate spring occurrences along the north side of the Snake River between Milner Sam and King Hill, and (4) to estimate spring discharge from the north wall of the canyon.

Covington, H.R.; Weaver, Jean N.

1991-01-01

103

Geohydrology of the regional aquifer system, western Snake River plain, southwestern Idaho  

USGS Publications Warehouse

A three dimensional groundwater flow model was developed to simulate steady state and nonsteady-state hydrologic conditions of the regional aquifer system in the western Snake River Plain of Idaho. Water budget analysis showed that groundwater recharge was about 1,400,000 acre-ft in 1980; groundwater pumpage was estimated to be 300,000 acre-ft. Two mass water level measurements were made in March and August 1980 to define the water table in the regional system. The model was discretized into 25 rows, 72 columns, and 3 layers. Each cell represented 4 sq mi. The model was calibrated to 1980 hydrologic conditions. Calibrated transmissivity of layer 1 (500 ft thick) ranged from 1,500 to 21,500 sq ft/day. Calibrated specific yield of unconfined aquifers was 0.10 and calibrated storage coefficient of confined aquifers ranged from 0.0004 to 0.007. The calibrated model was verified by simulating monthly water-level fluctuations for 1980. Simulated water levels matched measured levels in the Boise River Valley, but the match in other areas was poor. (USGS)

Newton, G. D.

1989-01-01

104

Geology and geophysics of the southern Raft River Valley geothermal area, Idaho, USA  

USGS Publications Warehouse

The Raft River valley, near the boundary of the Snake River plain with the Basin and Range province, is a north-trending late Cenozoic downwarp bounded by faults on the west, south, and east. Pleistocene alluvium and Miocene-Pliocene tuffaceous sediments, conglomerate, and felsic volcanic rocks aggregate 2 km in thickness. Large gravity, magnetic, and total field resistivity highs probably indicate a buried igneous mass that is too old to serve as a heat source. Differing seismic velocities relate to known or inferred structures and to a suspected shallow zone of warm water. Resistivity anomalies reflect differences of both composition and degree of alteration of Cenozoic rocks. Resistivity soundings show a 2 to 5 ohm·m unit with a thickness of 1 km beneath a large part of the valley, and the unit may indicate partly hot water and partly clayey sediments. Observed self-potential anomalies are believed to indicate zones where warm water rises toward the surface. Boiling wells at Bridge, Idaho are near the intersection of north-northeast normal faults which have moved as recently as the late (?) Pleistocene, and an east-northeast structure, probably a right-lateral fault. Deep circulation of ground water in this region of relatively high heat flow and upwelling along faults is the probable cause of the thermal anomaly.

Williams, Paul L.; Mabey, Don R.; Zohdy, Adel A. R.; Hans, Ackerman; Hoover, Donald B.; Pierce, Kenneth L.; Oriel, Steven S.

1976-01-01

105

Capacity of the diversion channel below the flood-control dam on the Big Lost River at the Idaho National Engineering Laboratory, Idaho  

SciTech Connect

Stage-discharge relations were computed for two selected cross sections of a diversion channel at the Idaho National Engineering Laboratory for discharges between 2000 and 7200 cubic feet per second. The channel diverts water from the Big Lost River into four spreading areas where the water infiltrates into the ground or evaporates. Computed water-surface profiles, based on channel conditions in the summer of 1985, indicate that the diversion channel will carry a maximum discharge of 7200 cubic feet per second from the Big Lost River into the first spreading area. Backwater from the spreading areas is not expected to decrease the carrying capacity of the diversion channel. An additional 2100 cubic feet per second will pass through two low swales west of the main channel for a combined maximum diversion capacity of 9300 cubic feet per second.

Bennett, C.M.

1986-10-01

106

High-precision provenance determination using detrital-zircon ages and petrography of Quaternary sands on the eastern Snake River Plain, Idaho  

Microsoft Academic Search

The Big Lost trough is an upper Pliocene to Holocene sedimentary basin containing volcanic sills in the northeastern Snake River Plain, Idaho. The basin receives sediment primarily from Basin and Range fluvial systems of the Big Lost River, Little Lost River, and Birch Creek. The Big Lost trough contains a >200-m-thick succession of lacustrine, fluvial, eolian, and playa sediments, recording

J. K. Geslin; P. K. Link; C. M. Fanning

1999-01-01

107

Time-dependent inversion of three-component GPS time series for steady and transient effects of the Yellowstone Hotspot on the Snake River Plain, Idaho  

Microsoft Academic Search

Crustal deformation in the Northern Basin and Range and Snake River Plain results from extension overprinted by volcanism associated with the Yellowstone Hotspot. The Snake River Plain is a seismically quiet, low-relief physiographic feature that extends from eastern Oregon through southern Idaho and into northwestern Wyoming. The Northern Basin and Range surrounds the Snake River Plain and is distinguished by

S. J. Payne; R. McCaffrey; R. W. King

2009-01-01

108

Mapping the response of riparian vegetation to possible flow reductions in the Snake River, Idaho  

NASA Astrophysics Data System (ADS)

This study was initiated to determine the general effects of potential flow reductions in the middle Snake River (Swan Falls Dam downstream to the Idaho-Oregon border) on its riparian vegetation. Considerable water from the river is currently used to irrigate the adjacent Snake River Plain, and increased demand for water in the future is likely. The problem was subdivided into several research components including: field investigation of the existing riparian vegetation and river environment, hydrological modeling to calculate the effects of one flow scenario on hydrological regime, and integration of vegetation and hydrological modeling results with a Geographic Information System (GIs) to map the riverbed, island, and bank conditions under the scenario flow. Field work was conducted in summer 1990. Riparian vegetation along 40 U.S. Geological Survey cross-sections was sampled at approximately 1.25 mile intervals within the 50 mile long study area. Cross-section and flow data were provided by the U.S. Geological. Survey. GIs mapping of land/water cover using ARC/INFO was based on 1987 aerial photographs. Riverbed contour maps were produced by linking cross-section data, topographic contouring software ( ANUDEM), and GIs. The maps were used to spatially display shallow areas in the channel likely to become vegetated under reduced flow conditions. The scenario would reduce flow by approximately 20% (160 MAF) and lower the river an average of 0.5 ft. The scenario flow could cause a drop in the elevation of the riparian zone comparable to the drop in mean river level and expansion of the lower riparian zone into shallow areas of the channel. The GIs maps showed that the shallow areas of the channel more likely to become vegetated under the scenario flow are located in wide reaches near islands. Some possible ecological consequences of the scenario flow include a greater area of riparian habitat, reduced flow velocity and sedimentation in shallow channels leading to channel deactivation, increased island visitation and nest predation by predatory mammals due to loss of a water barrier between some islands and banks, and larger populations of alien plant species in the new riparian vegetation.

Carter Johnson, W.; Dixon, Mark D.; Simons, Robert; Jenson, Susan; Larson, Kevin

1995-09-01

109

Straddle-packer aquifer test analyses of the Snake River Plain aquifer at the Idaho National Engineering Laboratory  

SciTech Connect

The State of Idaho INEL Oversight Program, with the University of Idaho, Idaho State University, Boise State University, and the Idaho Geologic Survey, used a straddle-packer system to investigate vertical variations in characteristics of the Snake River Plain aquifer at the Idaho National Engineering Laboratory in southeast Idaho. Sixteen single-well aquifer tests were conducted on.isolated intervals in three observation wells. Each of these wells has approximately 200 feet of open borehole below the water table, penetrating the E through G and I basalt flow groups and interbedded sediments of the Snake River Plain aquifer. The success of the aquifer tests was limited by the inability to induce measurable drawdown in several zones. Time-drawdown data from aquifer tests were matched to type curves for 8 of the 16 zones tested. A single aquifer test at the water table exhibited greater curvature than those at depth. The increased degree of curvature suggests an unconfined response and resulted in an estimate of specific yield of 0.03. Aquifer tests below the water table generally yielded time-drawdown graphs with a rapid initial response followed by constant drawdown throughout the duration of the tests; up to several hours in length. The rapid initial response implies that the aquifer responds as a confined system during brief pumping periods. The nearly constant drawdown suggests a secondary source of water, probably vertical flow from overlying and underlying aquifer layers. Three analytical models were applied for comparison to the conceptual model and to provide estimates of aquifer properties. This, Hantush-Jacob leaky aquifer, and the Moench double-porosity fractured rock models were fit to time-drawdown data. The leaky aquifer type curves of Hantush and Jacob generally provided the best match to observed drawdown. A specific capacity regression equation was also used to estimate hydraulic conductivity.

Johnson, G.S.; Frederick, D.B.

1997-01-01

110

Martian Plains Volcanism in Syria Planum and Tempe Mareotis as Analogs to the Eastern Snake River Plains, Idaho: Similarities and Possible Petrologic Contributions to Topography  

Microsoft Academic Search

We compare martian volcanic shield topographic characteristics to topography of a similar range of shield features in the Eastern Snake River Plains of Idaho, where compositional variations are known to contribute to petrologic and topographic differences.

S. E. H. Sakimoto; T. K. P. Gregg; S. S. Hughes; J. Chadwick

2003-01-01

111

Comparison of Plains Volcanism in the Tempe Terra Region of Mars to the Eastern Snake River Plains, Idaho with Implications for Geochemical Constraints  

Microsoft Academic Search

This study provides a topographic parameter analysis of the volcanic edifices of the Eastern Snake River Plains, Idaho and Tempe Terra Mars. The topographic parameters in these areas partially overlap, suggesting similar causes of diversity.

S. L. Weren; S. E. H. Sakimoto; S. S. Hughes; T. K. P. Gregg

2004-01-01

112

Characteristics and origin of Earth-mounds on the Eastern Snake River Plain, Idaho  

SciTech Connect

Earth-mounds are common features on the Eastern Snake River Plain, Idaho. The mounds are typically round or oval in plan view, <0.5 m in height, and from 8 to 14 m in diameter. They are found on flat and sloped surfaces, and appear less frequently in lowland areas. The mounds have formed on deposits of multiple sedimentary environments. Those studied included alluvial gravel terraces along the Big Lost River (late Pleistocene/early Holocene age), alluvial fan segments on the flanks of the Lost River Range (Bull Lake and Pinedale age equivalents), and loess/slopewash sediments overlying basalt flows. Backhoe trenches were dug to allow characterization of stratigraphy and soil development. Each mound has features unique to the depositional and pedogenic history of the site; however, there are common elements to all mounds that are linked to the history of mound formation. Each mound has a {open_quotes}floor{close_quotes} of a sediment or basement rock of significantly different hydraulic conductivity than the overlying sediment. These paleosurfaces are overlain by finer-grained sediments, typically loess or flood-overbank deposits. Mounds formed in environments where a sufficient thickness of fine-grained sediment held pore water in a system open to the migration to a freezing front. Heaving of the sediment occurred by the growth of ice lenses. Mound formation occurred at the end of the Late Pleistocene or early in the Holocene, and was followed by pedogenesis. Soils in the mounds were subsequently altered by bioturbation, buried by eolian deposition, and eroded by slopewash runoff. These secondary processes played a significant role in maintaining or increasing the mound/intermound relief.

Tullis, J.A.

1995-09-01

113

Subsurface geology and geothermal prospects in the Nampa-Caldwell area of the western Snake River Plain, Idaho  

Microsoft Academic Search

Subsurface geological and geophysical data show a 2100-m-thick sequence of interbedded basalt and sediment lie beneath the Idaho Group sediments in the Nampa-Caldwell area of the western Snake River Plain. Numerous faults in the subsurface define a central horst that divides the subsurface into separate basins. Overlying the basalt section are widespread sandstone aquifers that can be expected to yeild

S. H. Wood; J. C. Mitchell; J. Anderson

1980-01-01

114

Temperatures and heat flow in INEL-GT1 and WO2 boreholes, Snake River Plain, Idaho  

Microsoft Academic Search

The researchers have logged temperatures in the deep geothermal test at the INEL test site on the eastern Snake River Plains in Idaho (INEL-GT1) three times over a period of 8 years. The first logging was on 8\\/20\\/82 when they reached a depth of 2100 m. They were unable to get past the casing shoe at that depth. In 1983

Blackwell

1990-01-01

115

Assessing the accuracy of thermoluminescence for dating baked sediments beneath late Quaternary lava flows, Snake River Plain, Idaho  

Microsoft Academic Search

Baked sediments beneath lava flows on the Snake River Plain, Idaho, with independent age control by either ¹⁴C or K\\/Ar dating were analyzed to evaluate the accuracy of the thermoluminescence (TL) technique. The age of flows ranges from â¼2 to 100 ka and multiple TL analyses by the total bleach method yielded ages that overlap at one sigma with independent

Steven L. Forman; James Pierson; G. Valentine; W. R. Hackett

1994-01-01

116

Characterization and evolution of fractures in low-volume pahoehoe lava flows, eastern Snake River Plain, Idaho  

Microsoft Academic Search

We characterize fracture evolution in pa- hoehoe lava flows of the eastern Snake Riv- er Plain, Idaho, and highlight significant differences to flood-basalt sheet flows and implications for hydrologic models. There are four distinct fracture types in east- ern Snake River Plain flows: (1) column- bounding; (2) column-normal; (3) entabla- ture; and (4) inflation fractures. Types 1-3 are driven by

Conrad J. Schaefer; Simon A. Kattenhorn

2004-01-01

117

Large-volume, low-delta18O rhyolites of the central Snake River Plain, Idaho, USA  

Microsoft Academic Search

The Miocene Bruneau-Jarbidge and adjacent volcanic fields of the central Snake River Plain, southwest Idaho, are dominated by high-temperature rhyolitic tuffs and lavas having an aggregate volume estimated as 7000 km3. Samples from units representing at least 50% of this volume are strongly depleted in 18O, with magmatic feldspar delta18OVSMOW (Vienna standard mean ocean water) values between -1.40\\/00 and 3.80\\/00.

Scott Boroughs; John Wolff; Bill Bonnichsen; Martha Godchaux; Peter Larson

2005-01-01

118

Use of surrogate technologies to estimate suspended sediment in the Clearwater River, Idaho, and Snake River, Washington, 2008-10  

USGS Publications Warehouse

Elevated levels of fluvial sediment can reduce the biological productivity of aquatic systems, impair freshwater quality, decrease reservoir storage capacity, and decrease the capacity of hydraulic structures. The need to measure fluvial sediment has led to the development of sediment surrogate technologies, particularly in locations where streamflow alone is not a good estimator of sediment load because of regulated flow, load hysteresis, episodic sediment sources, and non-equilibrium sediment transport. An effective surrogate technology is low maintenance and sturdy over a range of hydrologic conditions, and measured variables can be modeled to estimate suspended-sediment concentration (SSC), load, and duration of elevated levels on a real-time basis. Among the most promising techniques is the measurement of acoustic backscatter strength using acoustic Doppler velocity meters (ADVMs) deployed in rivers. The U.S. Geological Survey, in cooperation with the U.S. Army Corps of Engineers, Walla Walla District, evaluated the use of acoustic backscatter, turbidity, laser diffraction, and streamflow as surrogates for estimating real-time SSC and loads in the Clearwater and Snake Rivers, which adjoin in Lewiston, Idaho, and flow into Lower Granite Reservoir. The study was conducted from May 2008 to September 2010 and is part of the U.S. Army Corps of Engineers Lower Snake River Programmatic Sediment Management Plan to identify and manage sediment sources in basins draining into lower Snake River reservoirs. Commercially available acoustic instruments have shown great promise in sediment surrogate studies because they require little maintenance and measure profiles of the surrogate parameter across a sampling volume rather than at a single point. The strength of acoustic backscatter theoretically increases as more particles are suspended in the water to reflect the acoustic pulse emitted by the ADVM. ADVMs of different frequencies (0.5, 1.5, and 3 Megahertz) were tested to target various sediment grain sizes. Laser diffraction and turbidity also were tested as surrogate technologies. Models between SSC and surrogate variables were developed using ordinary least-squares regression. Acoustic backscatter using the high frequency ADVM at each site was the best predictor of sediment, explaining 93 and 92 percent of the variability in SSC and matching sediment sample data within +8.6 and +10 percent, on average, at the Clearwater River and Snake River study sites, respectively. Additional surrogate models were developed to estimate sand and fines fractions of suspended sediment based on acoustic backscatter. Acoustic backscatter generally appears to be a better estimator of suspended sediment concentration and load over short (storm event and monthly) and long (annual) time scales than transport curves derived solely from the regression of conventional sediment measurements and streamflow. Changing grain sizes, the presence of organic matter, and aggregation of sediments in the river likely introduce some variability in the model between acoustic backscatter and SSC.

Wood, Molly S.; Teasdale, Gregg N.

2013-01-01

119

Seismic baseline and induction studies: Roosevelt Hot Springs, Utah and Raft River, Idaho  

SciTech Connect

Local seismic networks were established at the Roosevelt Hot Springs geothermal area, utah and at Raft River geothermal area, Idaho to monitor the background seismicity prior to initiation of geothermal power production. The Raft River study area is currently seismically quiet down to the level of approximately magnitude one. The Roosevelt Hot Springs area has low-level seismic activity for M/sub L/ greater than about two; however, microearthquake (M/sub L/ less than or equal to 2) swarms appear to be relatively common. One swarm occurred adjacent to the Roosevelt geothermal area during the summer of 1981. From June 27 to August 28, 1044 microearthquakes (M/sub L/ less than or equal to 1.5) were recorded from which 686 earthquakes were located and analysed. The main cluster of microearthquakes was located about 2 km east of the production field at a depth of about 5 km. A few small events were located in the production field at shallow depths (< 2 km). Three of the four largest earthquakes in the swarm (M/sub L/ 1.5-2.0) were located 4 to 5 km further east along a n-NW trend beneath the flank of the adjacent Mineral Mountains. Focal mechanism solutions indicate primarily normal faulting due to the regional E-W extension which characterizes this portion of the eastern Basin and Range province. Hence, the Mineral Mountain swarm appears to be a natural release of tectonic stress in this area. Nevertheless, the occurrence of natural earthquake swarms indicates a potential for induced seismicity at Roosevelt Hot Springs after major production operations are initiated.

Zandt, G.; McPherson, L.; Schaff, S.; Olsen, S.

1982-05-01

120

DATA RECOVERY EFFORTS AT IDAHO NATIONAL LABORATORY, OAK RIDGE NATIONAL LABORATORY, AND SAVANNAH RIVER NATIONAL LABORATORY  

SciTech Connect

Abstract was already submitted. Could not find the previous number. Would be fine with attaching/update of old number. Abstract Below: Modern nuclear facilities will have significant process monitoring capability for their operators. These systems will also be used for domestic safeguards applications, which has led to research over new diversion-detection algorithms. Curiously missing from these efforts are verification and validation data sets. A tri-laboratory project to locate the existing data sets and recover their data has yielded three major potential sources of data. The first is recovery of the process monitoring data of the Idaho Chemical Processing Plant, which now has a distributable package for algorithm developers. The second data set is extensive sampling and process data from Savannah River National Laboratory’s F- and H-canyon sites. Finally, high fidelity data from the start-up tests at the Barnwell Reprocessing Facility is in recovery. This paper details the data sets and compares their relative attributes.

Richard Metcalf; Saleem Salaymeh; Michael Ehinger

2010-07-01

121

Macro- and microscale investigation of selenium speciation in Blackfoot river, Idaho sediments.  

PubMed

The transport and bioavailability of selenium in the environment is controlled by its chemical speciation. However, knowledge of the biogeochemistry and speciation of Se in streambed sediment is limited. We investigated the speciation of Se in sediment cores from the Blackfoot River (BFR), Idaho using sequential extractions and synchrotron-based micro-X-ray fluorescence (micro-SXRF). We collected micro-SXRF oxidation state maps of Se in sediments, which had not been done on natural sediment samples. Selective extractions showed that most Se in the sediments is present as either (1) nonextractable Se or (2) base extractable Se. Results from micro-SXRF showed three defined species of Se were present in all four samples: Se(-II,O), Se(IV), and Se(VI). Se(-II,O) was the predominant species in samples from one location, and Se(IV) was the predominant species in samples from a second location. Results from both techniques were consistent, and suggested that the predominant species were Se(-II) species associated with recalcitrant organic matter, and Se(IV) species tightly bound to organic materials. This information can be used to predict the biogeochemical cycling and bioavailability of Se in streambed sediment environments. PMID:18853796

Oram, Libbie L; Strawn, Daniel G; Marcus, Matthew A; Fakra, Sirine C; Möller, Gregory

2008-09-15

122

Assessing riparian shade for the Lemhi River, Idaho using LiDAR: A point cloud analysis  

NASA Astrophysics Data System (ADS)

Riparian vegetation plays a crucial role in shading streams by reducing the amount of incoming solar insolation that would otherwise reach the water surface, negatively affecting water temperature and photosynthetic organisms within the water column. Unlike incoming solar insolation, riparian shade can be manipulated by adding or removing riparian vegetation, making it attractive for restoration as well as thermal credit trading programs. Before riparian shade can be evaluated in such trading programs, the existing riparian vegetation needs to be quantified. Several studies have investigated the utility of LiDAR derived canopy height models for estimating riparian shade, however, few to no studies have used point cloud data as a direct model input in order to improve the riparian shade estimates. Using point cloud data increases spatial resolution and the ability to extract vegetation shape information without losses due to interpolation/rasterization. In this study, we assessed the ability of LiDAR point cloud data to estimate riparian shade for 32 km of the Lemhi River in north central Idaho. Riparian shade quantification of the point cloud and canopy height models are compared to shade values calculated using established models in practice.

Spaete, L.; Glenn, N. F.; Shrestha, R.; Shumar, M. L.; Mitchell, J.

2012-12-01

123

Additions and corrections to the bibliography of geologic studies, Columbia Plateau (Columbia River Besalt) and adjacent Areas, in Idaho, 1980  

SciTech Connect

This bibliography is an update to Idaho Bureau of Mines and Geology Open-File Report 78-6, Bibliography of Geological Studies, Columbia Plateau (Columbia River Basalt Group) and adjacent areas in Idaho (also known as Rockwell Hanford Operations' contractor report RHO-BWI-C-44). To keep the original document current, this additions and corrections report was prepared for the Basalt Waste Isolation Project of Rockwell Hanford Operations. This update is supplementary; therefore, references cited in the original document have not been included here. What is included are materials that have become available since the original publication and pertinent literature that had originally been overlooked. Accompany this updated bubliography are index maps that show locations of geologic studies and geochemical petrographic, remanent paleomagnetic, and radiometric age-dated sites within the Columbia River Basalt Group field within Idaho; also identified are archeological sites, test wells, mines, quarries, and other types of excavations. References on the index maps are keyed to the bibliography and cover the Spokane, Pullman, Hamilton, Grangeville, Elk City, Baker, Boise, and Jordan Valley Army Map Service two-degree quadrangles.

Strowd, W.

1980-01-01

124

Geologic map and profiles of the north wall of the Snake River Canyon, Pasadena Valley and Ticeska quadrangles, Idaho  

USGS Publications Warehouse

The Snake River Plain is a broad, arcuate region of low relief that extends more than 300 mi across southern Idaho. The Snake River enters the plain near Idaho Falls and flows westward along the southern margin of the eastern Snake River Plain (fig. 1), a position mainly determined by the basaltic lava flows that erupted near the axis of the plain. The highly productive Snake River Plain aquifer north of the Snaked River underlies the most of the eastern plain. The aquifer is composed of basaltic ricks that are interbedded with fluvial and lacustrine sedimentary rocks. The top of the aquifer (water table) is typically less than 500 ft below the land surface, but is deeper than 1,000 ft in few areas. The Snake River had excavated a canyon into the nearly flat-lying basaltic and sedimentary rocks of the eastern Snake River Plain between Milner Dam and King Hill (fig. 2), a distance of almost 90 mi. For much of its length the canyon intersects the Snake River Plain aquifer, which discharges from the north canyon wall as springs of variable size, spacing, and altitude. Geologic controls on springs are of importance because nearly 60 percent of the aquifer's discharge occurs as spring flow along this reach of the canyon. This report is one of several that describes the geologic occurrence of springs along the northern wall of the Snake River canyon from Milner Dam to King Hill. To understand the local geologic controls on springs, the Water Resources Division of the U.S. Geological Survey initiated a geologic mapping project as part of their Snake River Plain Regional Aquifer System-Analysis Program. Objectives of the project were (1) to prepare a geologic map of a strip of land immediately north of the Snake River canyon, (2) to map the geology of the north canyon wall in profile, (3) to locate spring occurrences along the north side of the Snake River between Milner Dam and King Hill, and (4) to estimate spring discharge from the north wall of the canyon.

Covington, H.R.; Weaver, Jean N.

1990-01-01

125

A Late Pleistocene to Holocene Record of Precipitation Reflected in Margaritifera falcata Shell ? 18O From Three Archaeological Sites in the Lower Salmon River Canyon, Idaho  

Microsoft Academic Search

Oxygen-18 (?18O) concentrations in Margaritifera falcata shells preserved in three archaeological sites in the Lower Salmon River Canyon of Idaho are compared with modern mussel shells. Shell ?18O records show that Late Pleistocene and Early Holocene climates were drier with occasional periods of increased precipitation. After c.4000 years bp, precipitation is higher in the Salmon River basin than at present

Loren G. Davis; Karlis Muehlenbachs

2001-01-01

126

Seismic Reflection Project Near the Southern Terminations of the Lost River and Lemhi Faults, Eastern Snake River Plain, Idaho  

SciTech Connect

Thirteen seismic reflection lines were processed and interpreted to determine the southern terminations of the Lost River and Lemhi faults along the northwest boundary of the eastern Snake River Plain (ESRP). The southernmost terminations of the Arco and Howe segments were determined to support characterization of the Lost River and Lemhi fault sources, respectively, for the INL probabilistic seismic hazard analysis. Keywords:Keywords are required forExternal Release Review*Keywords  Keywords *Contacts (Type and Name are required for each row) Type ofContactContact Name  POC Editor RecordFour commercial seismic reflection lines (Arco lines 81-1 and 81-2; Howe lines 81-3 and 82-2) were obtained from the Montana Power Company. The seismic data were collected in the early 1980’s using a Vibroseis source with station and shot point locations that resulted in 12-fold data. Arco lines 81?1 and 81?2 and Howe lines 81?3 and 82?2 are located within the basins adjacent to the Arco and Howe segments, respectively. Seven seismic lines (Arco lines A1, A2, A3, and A4 and Howe lines H1, H2, and H3) were acquired by EG&G Idaho, Inc. Geosciences for this study using multiple impacts with an accelerated weight drop source. Station and shot point locations yielded 12-fold data. The seismic reflection lines are oriented perpendicular to and at locations along the projected extensions of the Arco and Howe fault segments within the ESRP. Two seismic lines (Arco line S2 and Howe line S4) were obtained from Sierra Geophysics. In 1984, they acquired seismic reflection data using an accelerated weight drop source with station and shot point locations that yielded 6-fold data. The two seismic reflection lines are oriented perpendicular to and at locations along the projected extensions of the Arco and Howe fault segments within the ESRP. In 1992 for this study, Geotrace Technologies Inc. processed all of the seismic reflection data using industry standard processing techniques. The southern termination of the Howe segment of the Lemhi fault was placed between Howe lines H1 and H2, 2.2 km south of the fault’s southernmost surface expression. In the adjacent basin, south-dipping normal faults at the northern end of Howe line 81-3 and two southwest-dipping normal faults at the northeastern end of Howe line 82-2 that can be correlated with Howe segment. South of the surface expression, two southwest-dipping normal faults on Howe line H1 can be correlated with the Howe segment. Further into the ESRP, Howe lines H2, H3, and S4 show continuous flat lying reflectors and indicate no fault offset. The southern termination of the Arco segment of the Lost River fault was placed between Arco lines S2 and A3, a distance of 4.6 km south of the fault’s southernmost surface expression. Within the basin, west-dipping normal faults interpreted on Arco lines 81-1 and 81-2 can be correlated with the Arco segment. Further south within the Arco volcanic rift zone (VRZ), three seismic lines (Arco lines A2, S2, and A3) permit two interpretations. The west- and south-dipping normal faults on Arco lines A2 and S2 could be associated with slip along the Arco segment. These normal faults have an opposite dip to an east-dipping fault on Arco line A3. The observed small-offsets (< 85 m) along the oppositely dipping normal faults can be interpreted as a graben structure that resulted from dike intrusion within the Arco VRZ. Arco line A4 further south within the Arco VRZ shows flat lyin

S. M. Jackson; G. S. Carpenter; R. P. Smith; J. L. Casper

2006-10-01

127

Geologic map and profiles of the north wall of the Snake River Canyon, Bliss, Hagerman, and Tuttle quadrangles, Idaho  

USGS Publications Warehouse

The Snake River Plain is a broad, arcuate region of low relief that extends more than 300 mi across southern Idaho. The Snake River enters the plain near Idaho Falls and flows westward along the southern margin of the eastern Snake River Plain (fig. 1), a position mainly determined by the basaltic lava flows that erupted near the axis of the plain. The highly productive Snake River Plain aquifer north of the Snake River underlies most of the eastern plain. The aquifer is composed of basaltic rocks that are interbedded with fluvial and lacustrine sedimentary rocks. The top of the aquifer (water table) is typically less than 500 ft below the land surface, but is deeper than 1,000 ft in a few areas. The Snake River has excavated a canyon into the nearly flat-lying basaltic and sedimentary rocks of the eastern Snake River Plain between Milner Dam and King Hill (fig. 2), a distance of almost 90 mi. For much of its length the canyon wall as springs of variable size, spacing, and altitude. Geologic controls on springs are of importance because nearly 60 percent of the aquifer's discharge occurs as spring flow along this reach of the canyon. This report is one of several that describes the geologic occurrence of springs along the northern wall of the Snake River canyon from Milner Dam to King Hill (fig. 1). To understand the local geologic controls on springs, the Water Resources Division of the U.S. Geological Survey initiated a geologic mapping project as part of their Snake River Plain Regional Aquifer System-Analysis Program. Objectives of the project were (1) to prepare a geologic map of a strip of land immediately north of the Snake River canyon, (2) to map the geology of the north canyon wall in profile, (3) to locate spring occurrences along the north side of the Snake River between Milner Dam and King Hill, and (4) to estimate spring discharge from the north wall of the canyon.

Covington, H.R.; Weaver, Jean N.

1990-01-01

128

Lead exposure and poisoning of songbirds using the Coeur d'Alene River Basin, Idaho  

USGS Publications Warehouse

Previous studies have found widespread Pb poisoning of waterfowl in the Coeur d'Alene River Basin in northern Idaho, USA, which has been contaminated by mining and smelting activities. We studied the exposure of ground-feeding songbirds to Pb, sampling 204 American robins (Turdus migratorius), song sparrows (Melospiza melodia), and Swainson's thrushes (Catharus ustulatus) throughout the basin. These songbirds had mean blood Pb concentrations (mg/kg, dry weight) of less than 0.19 at a reference area (25 mg Pb/kg soil), 1.09 at moderately contaminated sites (170 to 1300 mg Pb/kg soil), and 2.06 at highly contaminated sites (2000 to 5000 mg Pb/kg soil). Based on guidelines for evaluating blood Pb in birds, 6% of robins from the highly contaminated sites had background concentrations, 24% were subclinically poisoned, 52% were clinically poisoned, and 18% were severely clinically poisoned with Pb. Blood Pb concentrations were lower in song sparrows than in robins and lowest in Swainson's thrushes. More than half of the robins and song sparrows from all contaminated sites and more than half of the Swainson's thrushes from highly contaminated sites showed at least 50% inhibition of the activity of the enzyme ?-aminolevulinic acid dehydratase (ALAD), commonly used as a measure of exposure to Pb. The highest hepatic Pb concentration of 61 mg/kg (dry weight) was detected in a song sparrow. Using Al as a marker for soil in songbird ingesta, we estimated average soil ingestion rates as 20% in robins, 17% in song sparrows, and 0.7% in Swainson's thrushes. Soil Pb in ingesta accounted for almost all of the songbirds' exposure to Pb. Based on these results, it is recommended that ecological risk assessments of ground-feeding songbirds at contaminated sites include soil ingestion as a pathway of exposure to Pb.

Hansen, James A.; Audet, Daniel; Spears, Brian L.; Healy, Kate A.; Brazzle, Roy E.; Hoffman, David J.; Dailey, Anne; Beyer, W. Nelson

2011-01-01

129

Lead exposure and poisoning of songbirds using the Coeur d'Alene River Basin, Idaho, USA.  

PubMed

Previous studies have found widespread Pb poisoning of waterfowl in the Coeur d'Alene River Basin in northern Idaho, USA, which has been contaminated by mining and smelting activities. We studied the exposure of ground-feeding songbirds to Pb, sampling 204 American robins (Turdus migratorius), song sparrows (Melospiza melodia), and Swainson's thrushes (Catharus ustulatus) throughout the basin. These songbirds had mean blood Pb concentrations (mg/kg, dry weight) of less than 0.19 at a reference area (25 mg Pb/kg soil), 1.09 at moderately contaminated sites (170 to 1300 mg Pb/kg soil), and 2.06 at highly contaminated sites (2000 to 5000 mg Pb/kg soil). Based on guidelines for evaluating blood Pb in birds, 6% of robins from the highly contaminated sites had background concentrations, 24% were subclinically poisoned, 52% were clinically poisoned, and 18% were severely clinically poisoned with Pb. Blood Pb concentrations were lower in song sparrows than in robins and lowest in Swainson's thrushes. More than half of the robins and song sparrows from all contaminated sites and more than half of the Swainson's thrushes from highly contaminated sites showed at least 50% inhibition of the activity of the enzyme ?-aminolevulinic acid dehydratase (ALAD), commonly used as a measure of exposure to Pb. The highest hepatic Pb concentration of 61 mg/kg (dry weight) was detected in a song sparrow. Using Al as a marker for soil in songbird ingesta, we estimated average soil ingestion rates as 20% in robins, 17% in song sparrows, and 0.7% in Swainson's thrushes. Soil Pb in ingesta accounted for almost all of the songbirds' exposure to Pb. Based on these results, it is recommended that ecological risk assessments of ground-feeding songbirds at contaminated sites include soil ingestion as a pathway of exposure to Pb. PMID:21538831

Hansen, James A; Audet, Daniel; Spears, Brian L; Healy, Kate A; Brazzle, Roy E; Hoffman, David J; Dailey, Anne; Beyer, W Nelson

2011-10-01

130

Spawning Success of Hatchery Spring Chinook Salmon Outplanted as Adults in the Clearwater River Basin, Idaho, 2001.  

SciTech Connect

The study described in this report evaluated spawning distribution, overlap with naturally-arriving spawners, and pre-spawning mortality of spring chinook salmon, Oncorhynchus tshawytscha, outplanted as adults in the Clearwater River Subbasin in 2001. Returns of spring chinook salmon to Snake River Basin hatcheries and acclimation facilities in 2001 exceeded needs for hatchery production goals in Idaho. Consequently, management agencies including the U.S. Fish and Wildlife Service (FWS), Idaho Department of Fish and Game (IDFG) and Nez Perce Tribe (NPT) agreed to outplant chinook salmon adults as an adaptive management strategy for using hatchery adults. Adult outplants were made in streams or stream sections that have been typically underseeded with spawners. This strategy anticipated that outplanted hatchery chinook salmon would spawn successfully near the areas where they were planted, and would increase natural production. Outplanting of adult spring chinook salmon from hatcheries is likely to be proposed in years when run sizes are similar to those of the 2001 run. Careful monitoring of results from this year's outplanting can be used to guide decisions and methods for future adult outplanting. Numbers of spring chinook salmon outplanted was based on hatchery run size, hatchery needs, and available spawning habitat. Hatcheries involved in outplanting in the Clearwater Basin included Dworshak National Fish Hatchery, Kooskia National Fish Hatchery, Clearwater Anadromous Fish Hatchery, and Rapid River Fish Hatchery. The NPT, IDFG, FWS, and the National Marine Fisheries Service (NMFS) agreed upon outplant locations and a range of numbers of spring chinook salmon to be outplanted (Table 1). Outplanting occurred mainly in the Selway River Subbasin, but additional outplants were made in tributaries to the South Fork Clearwater River and the Lochsa River (Table 1). Actual outplanting activities were carried out primarily by the NPT with supplemental outplanting done in the Lochsa basin by IDFG. Fish were trucked from the hatcheries to outplant sites.

Cramer, Steven P.; Ackerman, Nichlaus; Witty, Kenneth L.

2002-04-16

131

Project HOTSPOT: Borehole geophysics log interpretation from the Snake River Plain, Idaho  

NASA Astrophysics Data System (ADS)

The Snake River Plain (SRP), Idaho, hosts potential geothermal resources due to elevated groundwater temperatures associated with the thermal anomaly Yellowstone-Snake River hotspot. Project HOTSPOT has coordinated international institutions and organizations to understand subsurface stratigraphy and assess geothermal potential. Over 5.9km of core were drilled from three boreholes within the SRP in an attempt to acquire continuous core documenting the volcanic and sedimentary record of the hotspot: (1) Kimama, (2) Kimberely, and (3) Mountain Home. The most eastern drill hole is Kimama located along the central volcanic axis of the SRP and documents basaltic volcanism. The Kimberely drill hole was selected to document continuous volcanism when analysed in conjunction with the Kimama drill hole and is located near the margin of the plain. The Mountain Home drill hole is located along the western plain and documents older basalts overlain by sediment. A suite of ground and borehole geophysical surveys were carried out within the SRP between 2010 and 2012. The borehole geophysics logs included gamma ray (spectral and natural), neutron hydrogen index, electrical resistivity, magnetic susceptibility, ultrasonic borehole televiewer imaging, full waveform sonic, and vertical seismic profile. The borehole geophysics logs were qualitatively assessed through visual interpretation of lithological horizons and quantitatively through physical property specialized software and digital signal processing automated filtering process to identify step functions and high frequency anomalies. Preliminary results were published by Schmitt et al. (2012), Potter et al. (2012), and Shervais et al. (2013). The results are continuously being enhanced as more information is qualitatively and quantitatively delineated from the borehole geophysics logs. Each drill hole encounters three principal units: massive basalt flows, rhyolite, and sediments. Basalt has a low to moderate porosity and is low in the natural gamma ray isotopes uranium, thorium, and potassium, while rhyolites produce high total gamma ray responses. Sediment interbeds become apparent as the radioactivity associated with fine grained minerals is significantly higher than that of the host rock (e.g. basalt) due to high hydrogen concentration within the crystal structure of clays. Basalt lacks conductive minerals and results in high resistivity but moderate magnetic susceptibility. The sediments on the other hand are highly conductive and have a low magnetic susceptibility. The basalt and rhyolite units are relatively massive except for fractures which become apparent in the ultrasonic borehole televiewer. Signal is lost in soft sediments resulting in dark regions when full amplitude is displayed for the ultrasonic borehole televiewer. The massive basalt shows short P- and S-wave travel times and therefore a high sonic velocity, while the sediments display only P-wave first arrivals.

Lee, M. D.; Schmitt, D. R.; Chen, X.; Shervais, J. W.; Liberty, L. M.; Potter, K. E.; Kessler, J. A.

2013-12-01

132

INVENTORY AND MONITORING OF BALD EAGLES AND OTHER RAPTORIAL BIRDS OF THE SNAKE RIVER, IDAHO 1998 Bald Eagle Territory Descriptions and Raptor Surveys  

E-print Network

Raptor species codes for raptorial birds to be inventoried and monitored in the Snake River study area Activity and productivity status for bald eagle breeding territories within the Idaho portion of the Greater Yellowstone Ecosystem, 1998 Activity and productivity status for bald eagle breeding territories within the Idaho portion of the Greater Yellowstone Ecosystem, 1999 Activity and productivity status for bald eagle breeding territories within the Idaho portion of the Greater Yellowstone Ecosystem, 2000 Historic trends in bald eagle productivity at nesting areas in Eastern Idaho, the Idaho portion of the Greater Yellowstone Ecosystem, 1987-1997 Known productivity at the Cress Creek bald eagle breeding area since re-establishment of nesting pairs Known productivity at the Menan Buttes bald eagle breeding area since re-establishment of nesting pairs Known productivity at the Cartier Slough bald eagle breeding area since re-establishment of nesting pairs Known productivity at the Annis Slough bald eagle breeding area since re-establishment of nesting pairs Snake River study area Trend in bald eagle productivity at nesting areas in East Idaho, the Idaho portion of the

unknown authors

133

Stratigraphy of the unsaturated zone and uppermost part of the Snake River Plain aquifer at test area north, Idaho National Engineering Laboratory, Idaho  

SciTech Connect

A complex sequence of basalt flows and sedimentary interbeds underlies Test Area North (TAN) at the Idaho National Engineering Laboratory in eastern Idaho. Wells drilled to depths of at least 500 feet penetrate 10 basalt-flow groups and 5 to 10 sedimentary interbeds that range in age from about 940,000 to 1.4 million years. Each basalt-flow group consists of one or more basalt flows from a brief, single or compound eruption. All basalt flows of each group erupted from the same vent, and have similar ages, paleomagnetic properties, potassium contents, and natural-gamma emissions. Sedimentary interbeds consist of fluvial, lacustrine, and eolian deposits of clay, silt, sand, and gravel that accumulated for hundreds to hundreds of thousands of years during periods of volcanic quiescence. Basalt and sediment are elevated by hundreds of feet with respect to rocks of equivalent age south and cast of the area, a relation that is attributed to past uplift at TAN. Basalt and sediment are unsaturated to a depth of about 200 feet below land surface. Rocks below this depth are saturated and make up the Snake River Plain aquifer. The effective base of the aquifer is at a depth of 885 feet below land surface. Detailed stratigraphic relations for the lowermost part of the aquifer in the depth interval from 500 to 885 feet were not determined because of insufficient data. The stratigraphy of basalt-flow groups and sedimentary interbeds in the upper 500 feet of the unsaturated zone and aquifer was determined from natural-gamma logs, lithologic logs, and well cores. Basalt cores were evaluated for potassium-argon ages, paleomagnetic properties, petrographic characteristics, and chemical composition. Stratigraphic control was provided by differences in ages, paleomagnetic properties, potassium content, and natural-gamma emissions of basalt-flow groups and sedimentary interbeds.

Anderson, S.R.; Bowers, B.

1995-06-01

134

Groundwater resources of the Wood River Valley, Idaho--A groundwater-flow model for resource management  

USGS Publications Warehouse

The U.S. Geological Survey (USGS), in collaboration with the Idaho Department of Water Resources (IDWR), will use the current understanding of the Wood River Valley aquifer system to construct a MODFLOW numerical groundwater-flow model to simulate potential anthropogenic and climatic effects on groundwater and surface-water resources. This model will serve as a tool for water rights administration and water-resource management and planning. The study will be conducted over a 3-year period from late 2012 until model and report completion in 2015.

Bartolino, James; Vincent, Sean

2013-01-01

135

Seismic hazards astride the boundary between the eastern Snake River Plain and northern Basin and Range Province Idaho  

SciTech Connect

The occurrence of the damaging 1983 M[sub w] 6.8 Borah Peak, Idaho earthquake, which ruptured a central segment of the Lost River fault, has increased the awareness of seismic hazards in this portion of the Northern Basin and Range Province (NBR). As a result, comprehensive deterministic and probabilistic seismic hazard analyses were performed for the Idaho National Engineering Laboratory (INEL) which is located within the eastern Snake River Plain (ESRP) but adjacent to the NBR. In this region, the most significant seismic sources are three late-Quaternary NBR normal faults, the Lost River, Lemhi and Beaverhead faults, and ESRP volcanic zones. For each source, the maximum earthquake, source geometry, recurrence and their uncertainties were estimated and incorporated into the probabilistic analysis through the use of logic trees. Recent paleoseismic trenching of the Lost River and Lemhi faults and volcanic mapping in the ESRP provided much of the data necessary to characterize the most significant seismic sources. Issues such as fault segmentation, temporal clustering, the nature of fault termination, and the maximum magnitude and recurrence of volcanic zone earthquakes were evaluated in the hazard analyses. Deterministic and probabilistic ground motions were computed using both empirical and stochastic approaches. In the deterministic analysis, the southern segments of the Lemhi fault controlled the hazard at the INEL due to their proximity and potential to generate M[sub w] [approximately]7 earthquakes. In the estimation of deterministic ground motions, potential rupture scenarios were evaluated for a Lemhi earthquake. In the probabilistic analysis, the hazard is dominated by the ESRP random earthquake, and the Lemhi and Lost River faults. The difference in the results of the two analyses points out the uncertainties in assessing seismic hazards due to random earthquakes and in regions of large but infrequent earthquakes.

Wong, I.G.; Hemphill-Haley, M.A.; Sawyer, T.L. (Woodward-Clyde Federal Services, Oakland, CA (United States)); Coppersmith, K.J.; Youngs, R.R. (Geomatrix Consultants, San Francisco, CA (United States)); Smith, R.P.; Jackson, S.M.; Hackett, W.R. (Idaho National Engineering Lab., Idaho Falls, ID (United States)); Silva, W.J.; Stark, C.M. (Pacific Engineering and Analysis, El Cerrito, CA (United States)); Knuepfer, P.L.K. (State Univ. of New York, Binghamton, NY (United States). Dept. of Geological Sciences); Bruhn, R.L.; Wu, D. (Univ. of Utah, Salt Lake City, UT (United States). Dept. of Geology and Geophysics)

1993-04-01

136

Phosphorus and suspended sediment load estimates for the Lower Boise River, Idaho, 1994-2002  

USGS Publications Warehouse

The U.S. Geological Survey used LOADEST, newly developed load estimation software, to develop regression equations and estimate loads of total phosphorus (TP), dissolved orthophosphorus (OP), and suspended sediment (SS) from January 1994 through September 2002 at four sites on the lower Boise River: Boise River below Diversion Dam near Boise, Boise River at Glenwood Bridge at Boise, Boise River near Middleton, and Boise River near Parma. The objective was to help the Idaho Department of Environmental Quality develop and implement total maximum daily loads (TMDLs) by providing spatial and temporal resolution for phosphorus and sediment loads and enabling load estimates made by mass balance calculations to be refined and validated. Regression models for TP and OP generally were well fit on the basis of regression coefficients of determination (R2), but results varied in quality from site to site. The TP and OP results for Glenwood probably were affected by the upstream wastewater-treatment plant outlet, which provides a variable phosphorus input that is unrelated to river discharge. Regression models for SS generally were statistically well fit. Regression models for Middleton for all constituents, although statistically acceptable, were of limited usefulness because sparse and intermittent discharge data at that site caused many gaps in the resulting estimates. Although the models successfully simulated measured loads under predominant flow conditions, errors in TP and SS estimates at Middleton and in TP estimates at Parma were larger during high- and low-flow conditions. This shortcoming might be improved if additional concentration data for a wider range of flow conditions were available for calibrating the model. The average estimated daily TP load ranged from less than 250 pounds per day (lb/d) at Diversion to nearly 2,200 lb/d at Parma. Estimated TP loads at all four sites displayed cyclical variations coinciding with seasonal fluctuations in discharge. Estimated annual loads of TP ranged from less than 8 tons at Diversion to 570 tons at Parma. Annual loads of dissolved OP peaked in 1997 at all sites and were consistently higher at Parma than at the other sites. The ratio of OP to TP varied considerably throughout the year at all sites. Peaks in the OP:TP ratio occurred primarily when flows were at their lowest annual stages; estimated seasonal OP:TP ratios were highest in autumn at all sites. Conversely, when flows were high, the ratio was low, reflecting increased TP associated with particulate matter during high flows. Parma exhibited the highest OP:TP ratio during all seasons, at least 0.60 in spring and nearly 0.90 in autumn. Similar OP:TP ratios were estimated at Glenwood. Whereas the OP:TP ratio for Parma and Glenwood peaked in November or December, decreased from January through May, and increased again after June, estimates for Diversion showed nearly the opposite pattern ? ratios were highest in July and lowest in January and February. This difference might reflect complex biological and geochemical processes involving nutrient cycling in Lucky Peak Lake, but further data are needed to substantiate this hypothesis. Estimated monthly average SS loads were highest at Diversion, about 400 tons per day (ton/d). Average annual loads from 1994 through 2002 were 144,000 tons at Diversion, 33,000 tons at Glenwood, and 88,000 tons at Parma. Estimated SS loads peaked in the spring at all sites, coinciding with high flows. Increases in TP in the reach from Diversion to Glenwood ranged from 200 to 350 lb/d. Decreases in TP were small in this reach only during high flows in January and February 1997. Decreases in SS, were large during high-flow conditions indicating sediment deposition in the reach. Intermittent data at Middleton indicated that increases and decreases in TP in the reach from Glenwood to Middleton were during low- and high-flow conditions, respectively. All constituents increased in the r

Donato, Mary M.; MacCoy, Dorene E.

2004-01-01

137

Multiscale Genetic Structure of Yellowstone Cutthroat Trout in the Upper Snake River Basin.  

SciTech Connect

Populations of Yellowstone cutthroat trout Oncorhynchus clarkii bouvierii have declined throughout their native range as a result of habitat fragmentation, overharvest, and introductions of nonnative trout that have hybridized with or displaced native populations. The degree to which these factors have impacted the current genetic population structure of Yellowstone cutthroat trout populations is of primary interest for their conservation. In this study, we examined the genetic diversity and genetic population structure of Yellowstone cutthroat trout in Idaho and Nevada with data from six polymorphic microsatellite loci. A total of 1,392 samples were analyzed from 45 sample locations throughout 11 major river drainages. We found that levels of genetic diversity and genetic differentiation varied extensively. The Salt River drainage, which is representative of the least impacted migration corridors in Idaho, had the highest levels of genetic diversity and low levels of genetic differentiation. High levels of genetic differentiation were observed at similar or smaller geographic scales in the Portneuf River, Raft River, and Teton River drainages, which are more altered by anthropogenic disturbances. Results suggested that Yellowstone cutthroat trout are naturally structured at the major river drainage level but that habitat fragmentation has altered this structuring. Connectivity should be restored via habitat restoration whenever possible to minimize losses in genetic diversity and to preserve historical processes of gene flow, life history variation, and metapopulation dynamics. However, alternative strategies for management and conservation should also be considered in areas where there is a strong likelihood of nonnative invasions or extensive habitat fragmentation that cannot be easily ameliorated.

Cegelski, Christine C.; Campbell, Matthew R.

2006-05-30

138

Continental Basalts of the Boise River Group Near Smith Prairie, Idaho  

Microsoft Academic Search

The Boise River Group of late Cenozoic age consists of basaltic lavas and intoresisted fluvial and lacustrine sediments deposited in drainages of the Boise River and Boise River South Fork from 1.8 to 0.2 m.y. Basalts of the Boise River Group can be divided into two groups based on major and trace element chemistry. Boise River Group 1 basalts (BRG

Scott K. Vetter; John W. Shervais

1992-01-01

139

American Rivers * Friends of the Earth * Idaho Rivers United *Institute for Fisheries Resources * National Wildlife Federation * Northwest Sportfishing  

E-print Network

between power production and salmon protection; increases pressure on the Columbia and Snake rivers Potential Changes in Allocation of the Federal Columbia River Power System after 2006 Dear Mr. Wright and Mr the costs and benefits of the Federal Columbia River Power System (FCRPS) in the Pacific Northwest after

140

Pliocene and early Pleistocene environments and climates of the western Snake River Plain, Idaho  

Microsoft Academic Search

Sedimentological, palynological, and magnetic susceptibility data provide paleoenvironmental and paleoclimatic information from a 989 ft (301 m) core of sediments from the upper Glenns Ferry and Bruneau Formations from near the town of Bruneau in Owyhee County, Idaho. Chronology is based on stratigraphic position, paleomagnetism, and biostratigraphic data, which collectively suggest a late Gauss Normal-Polarity Chron age for the Glenns

Robert S. Thompson

1996-01-01

141

Tritium concentrations in flow from selected springs that discharge to the Snake River, Twin Falls-Hagerman area, Idaho  

USGS Publications Warehouse

Concern has been expressed that some of the approximately 30,900 curies of tritium disposed to the Snake River Plain aquifer from 1952 to 1988 at the INEL (Idaho National Engineering Laboratory) have migrated to springs discharging to the Snake River in the Twin Falls-Hagerman area. To document tritium concentrations in springflow, 17 springs were sampled in November 1988 and 19 springs were sampled in March 1989. Tritium concentrations were less than the minimum detectable concentration of 0.5 pCi/mL (picocuries/mL) in November 1988 and less than the minimum detectable concentration of 0.2 pCi/mL in March 1989; the minimum detectable concentration was smaller in March 1989 owing to a longer counting time in the liquid scintillation system. The maximum contaminant level of tritium in drinking water as established by the U.S. Environmental Protection Agency is 20 pCi/mL. U.S. Environmental Protection Agency sample analyses indicate that the tritium concentration has decreased in the Snake River near Buhl since the 1970's. In 1974-79, tritium concentrations were less than 0.3 +/-0.2 pCi/mL in 3 of 20 samples; in 1983-88, 17 of 23 samples contained less than 0.3 +/-0.2 pCi/mL of tritium; the minimum detectable concentration is 0.2 pCi/mL. On the basis of decreasing tritium concentrations in the Snake River, their correlation to cessation of atmospheric weapons tests tritium concentrations in springflow less than the minimum detectable concentration, and the distribution of tritium in groundwater at the INEL, aqueous disposal of tritium at the INEL has had no measurable effect on tritium concentrations in springflow from the Snake River Plain aquifer and in the Snake River near Buhl. (USGS)

Mann, L.J.

1989-01-01

142

Changes in the Species Composition of the Fish Community in a Reach of the Kootenai River, Idaho, after Construction of Libby Dam  

Microsoft Academic Search

I evaluated fish community structure and the density and growth of mountain whitefish (Prosopium williamsoni) downstream of Libby Dam in a 1.0-km reach of the Kootenai River, Idaho, in 1994 and compared the results with those of a similar study in 1980, after closure of the dam. In 1980 seven species of fish were collected; mountain whitefish comprised 70% of

Vaughn L. Paragamian

2002-01-01

143

A LITERATURE SEARCH TO DETERMINE THE BASE-LINE CONDITIONS AND EFFECTS OF POLLUTION ON THE BIG WOOD RIVER AND MAGIC RESERVOIR, IDAHO. 1977  

EPA Science Inventory

This report examines existing information concerning the ecology of Magic Reservoir and Big Wood River, Idaho (17040219) to determine the background conditions and effects of pollution on these ecosystems. The area is a popular attraction for outdoor recreationists, which has st...

144

AN EXAMINATION OF THE NUTRIENT AND HEAVY METALS BUDGET IN THE SPOKANE RIVER BETWEEN POST FALLS AND HANGMANS CREEK, IDAHO. 1979-1981  

EPA Science Inventory

High concentrations of heavy metals and the nutrients nitrogen and phosphorus are major water quality problems in the Spokane River, Idaho (17010305) and its tributaries. Heavy metals are in quantity sufficiently high to exceed the 24-hour average criterion given by the USEPA (1...

145

Neoproterozoic Conglomerate and Breccia in the Formation of Leaton Gulch, Grouse Peak, northern Lost River Range, Idaho: Relation to Beaverhead Impact Structure  

Microsoft Academic Search

A unique area of pods and lenses of complex breccia overlain unconformably by boulder conglomerate, south of Challis, Idaho is interpreted to be part of the record of the Neoproterozoic Beaverhead Impact Event. On Grouse Peak at the north end of the Lost River Range (Pahsimeroi Mountains), the formation of Leaton Gulch (Neoproterozoic to Ordovician) contains two strati- graphic units.

Jennifer Carr; Paul Karl Link

146

The Effect of Cooling History on Fracture Patterns in Basalt Lava Flows: Insights From Field Observations, Eastern Snake River Plain, Idaho  

Microsoft Academic Search

We present field observations of fracture characteristics within basalt lava flows of the Eastern Snake River Plain (ESRP), Idaho, in an attempt to relate complex fracture geometries to flow morphology and cooling history. In so doing, we demonstrate that simple conduction cooling models, typically used to explain the development of column-bounding fractures (colonnade), are insufficient to account for the variety

C. J. Schaefer

2001-01-01

147

BIOLOGICAL METRIC DEVELOPMENT FOR THE ASSESSMENT OF NONPOINT POLLUTION IN THE SNAKE RIVER ECOREGION OF SOUTHERN IDAHO, 1990-91 FINAL REPORT  

EPA Science Inventory

The purpose of this project was to develop and test a biological assessment program for representative streams in the Snake River Basin ecoregion of southern Idaho. A habitat analysis component was included to provide an independent measure of environmental conditions. The over...

148

PHYSICAL, CHEMICAL, AND BIOLOGICAL CHARACTERISTICS OF THE BOISE RIVER FROM VETERANS MEMORIAL PARKWAY, BOISE TO STAR, IDAHO, OCTOBER 1987 TO MARCH 1987  

EPA Science Inventory

Chemical and physical data were collected at 6 sites and biological data at 5 sites on the Boise River between Veterans Memorial Parkway in Boise and Star, Idaho (17050114), from October 1987 to March 1988. Data were collected to determine whether trace elements from effluents d...

149

Regional gravity and magnetic anomalies in the eastern Snake River Plain, Idaho  

Microsoft Academic Search

Over the eastern Snake River Plain, the Bouguer gravity anomaly and the magnetic intensity are, in general, high. In detail, both the gravity and the magnetic anomalies are a complex of highs and lows, in contrast to the simpler anomalies over the western Snake River Plain. The broad gravity high associated with the eastern Snake River Plain cannot be produced

D. R. Mabey

1978-01-01

150

Interpretation of a gravity profile across the western Snake River Plain, Idaho  

Microsoft Academic Search

The gravity and magnetic anomalies over the western Snake River Plain suggest that the plain is underlain by a layer of dense magnetic rock that may be the Miocene Columbia River Basalt Group and by a thin upper crust. The western Snake River Plain may have formed as a rift in Miocene time in response to northeast lateral spreading with

Don R. Mabey

1976-01-01

151

Salmon Supplementation Studies in Idaho Rivers; Field Activities Conducted on Clear and Pete King Creeks, 2001 Annual Report.  

SciTech Connect

In 2001 the Idaho Fisheries Resource Office continued as a cooperator on the Salmon Supplementation Studies in Idaho Rivers (ISS) project on Pete King and Clear creeks. Data relating to supplementation treatment releases, juvenile sampling, juvenile PIT tagging, brood stock spawning and rearing, spawning ground surveys, and snorkel surveys were used to evaluate project data points and augment past data. Due to low adult spring Chinook returns to Kooskia National Fish Hatchery (KNFH) in brood year 1999 there was no smolt supplementation treatment release into Clear Creek in 2001. A 17,014 spring Chinook parr supplementation treatment (containing 1000 PIT tags) was released into Pete King Creek on July 24, 2001. On Clear Creek, there were 412 naturally produced spring Chinook parr PIT tagged and released. Using juvenile collection methods, Idaho Fisheries Resource Office staff PIT tagged and released 320 naturally produced spring Chinook pre-smolts on Clear Creek, and 16 natural pre-smolts on Pete King Creek, for minimum survival estimates to Lower Granite Dam. There were no PIT tag detections of brood year 1999 smolts from Clear or Pete King creeks. A total of 2261 adult spring Chinook were collected at KNFH. Forty-three females were used for supplementation brood stock, and 45 supplementation (ventral fin-clip), and 45 natural (unmarked) adults were released upstream of KNFH to spawn naturally. Spatial and temporal distribution of 37 adults released above the KNFH weir was determined through the use of radio telemetry. On Clear Creek, a total of 166 redds (8.2 redds/km) were observed and data was collected from 195 carcasses. Seventeen completed redds (2.1 redds/km) were found, and data was collected data from six carcasses on Pete King Creek.

Gass, Carrie; Olson, Jim M. (US Fish and Wildlife Service, idaho Fishery Resource Office, Ahsahka, ID)

2004-11-01

152

Geologic Controls of Hydraulic Conductivity in the Snake River Plain Aquifer At and Near the Idaho National Engineering and Environmental Laboratory, Idaho  

SciTech Connect

The effective hydraulic conductivity of basalt and interbedded sediment that compose the Snake River Plain aquifer at and near the Idaho National Engineering and Environmental Laboratory (INEEL) ranges from about 1.0x10 -2 to 3.2x10 4 feet per day (ft/d). This six-order-of-magnitude range of hydraulic conductivity was estimated from single-well aquifer tests in 114 wells, and is attributed mainly to the physical characteristics and distribution of basalt flows and dikes. Hydraulic conductivity is greatest in thin pahoehoe flows and near-vent volcanic deposits. Hydraulic conductivity is least in flows and deposits cut by dikes. Estimates of hydraulic conductivity at and near the INEEL are similar to those measured in similar volcanic settings in Hawaii. The largest variety of rock types and the greatest range of hydraulic conductivity are in volcanic rift zones, which are characterized by numerous aligned volcanic vents and fissures related to underlying dikes. Three broad categories of hydraulic conductivity corresponding to six general types of geologic controls can be inferred from the distribution of wells and vent corridors. Hydraulic conductivity of basalt flows probably is increased by localized fissures and coarse mixtures of interbedded sediment, scoria, and basalt rubble. Hydraulic conductivity of basalt flows is decreased locally by abundant alteration minerals of probable hydrothermal origin. Hydraulic conductivity varies as much as six orders of magnitude in a single vent corridor and varies from three to five orders of magnitude within distances of 500 to 1,000 feet. Abrupt changes in hydraulic conductivity over short distances suggest the presence of preferential pathways and local barriers that may greatly affect the movement of ground water and the dispersion of radioactive and chemical wastes downgradient from points of waste disposal.

S. R. Anderson; M. A. Kuntz; L. C. Davis

1999-02-01

153

Preliminary evaluation of materials for fluidized bed technology in geothermal wells at Raft River, Idaho, and East Mesa, California  

SciTech Connect

Corrosion tests of candidate materials for heat exchangers using liquid fluidized bed technology were conducted at the U.S. Department of Energy's geothermal wells at Raft River, Idaho, and at the Geothermal Components Test Facility (GCTF) in East Mesa, Calif. These investigations deal with moderate temperature ranges of 135 to 163 /degree/C for electrical generation and nonelectrical applications. The corrosion, erosion, and scale buildup were evaluated. The average penetration of Type 1025 carbon steel was 314 /mu/m/year. Hastelloy alloys G and C276, stainless steels Type 304L, Type 316, Type 347, and Nitronic 50 has average penetrations of less than 2/mu/m/year. 7 refs.

Dirk, W.J.; Allen, C.A.; McAtee, R.E.

1980-01-01

154

Surface-water/ground-water relations in the Lemhi River Basin, east-central Idaho  

USGS Publications Warehouse

This report summarizes work carried out in cooperation with the Bureau of Reclamation to provide hydrologic information to help Federal, State, and local agencies meet the goals of the Lemhi River Model Watershed Project. The primary goal of the project is to maintain, enhance, and restore anadromous and resident fish habitat in the Lemhi River, while maintaining a balance between resource protection and established water uses. The main objectives of the study were to carry out seepage measurements to determine seasonal distributed gains and losses in the Lemhi River and to estimate annual ground-water underflow from the basin to the Salmon River. In 1997, seepage measurements were made during and after the irrigation season along a 60-mile reach of the Lemhi River between Leadore and Salmon. Except for one 4-mile reach that lost 1.3 cubic feet per second per mile, the river gained from ground water in early August when ground-water levels were high. Highest flows in the Lemhi River in early August were about 400 cubic feet per second. In October, when ground-water levels were low, river losses to ground water were about 1 to 16 cubic feet per second per mile. In October, highest flows in the Lemhi River were about 500 cubic feet per second, near the river's mouth. Annual ground-water underflow from the Lemhi River Basin to the Salmon River was estimated by using a simplified water budget and by using Darcy's equation. The water-budget method contained large uncertainties associated with estimating precipitation and evapotranspiration. Results of both methods indicate that the quantity of ground water leaving the basin as underflow is small, probably less than 2 percent of the basin's total annual water yield.

Donato, Mary M.

1998-01-01

155

Age of irrigation water in ground water from the Eastern Snake River Plain Aquifer, south-central Idaho  

USGS Publications Warehouse

Stable isotope data (2H and 18O) were used in conjunction with chlorofluorocarbon (CFC) and tritium/helium-3 (3H/3He) data to determine the fraction and age of irrigation water in ground water mixtures from farmed parts of the Eastern Snake River Plain (ESRP) Aquifer in south-central Idaho. Two groups of waters were recognized: (1) regional background water, unaffected by irrigation and fertilizer application, and (2) mixtures of irrigation water from the Snake River with regional background water. New data are presented comparing CFC and 3H/3He dating of water recharged through deep fractured basalt, and dating of young fractions in ground water mixtures. The 3H/3He ages of irrigation water in most mixtures ranged from about zero to eight years. The CFC ages of irrigation water in mixtures ranged from values near those based on 3H/3He dating to values biased older than the 3H/3He ages by as much as eight to 10 years. Unsaturated zone air had CFC-12 and CFC-113 concentrations that were 60% to 95%, and 50% to 90%, respectively, of modern air concentrations and were consistently contaminated with CFC-11. Irrigation water diverted from the Snake River was contaminated with CFC-11 but near solubility equilibrium with CFC-12 and CFC-113. The dating indicates ground water velocities of 5 to 8 m/d for water along the top of the ESRP Aquifer near the southwestern boundary of the Idaho National Engineering and Environmental Laboratory (INEEL). Many of the regional background waters contain excess terrigenic helium with a 3He/4He isotope ratio of 7 x 10-6 to 11 x 10-6 (R/Ra = 5 to 8) and could not be dated. Ratios of CFC data indicate that some rangeland water may contain as much as 5% to 30% young water (ages of less than or equal to two to 11.5 years) mixed with old regional background water. The relatively low residence times of ground water in irrigated parts of the ESRP Aquifer and the dilution with low-NO3 irrigation water from the Snake River lower the potential for NO3 contamination in agricultural areas.

Plummer, L. N.; Rupert, M. G.; Busenberg, E.; Schlosser, P.

2000-01-01

156

Paleomagnetic correlation of the surface and subsurface stratigraphy in the southern part of the Idaho National Laboratory, eastern Snake River Plain, Idaho  

NASA Astrophysics Data System (ADS)

To refine the geologic framework used in conceptual and numerical models of groundwater flow and contaminant transport at and near the Idaho National Laboratory (INL), cross sections of the subsurface stratigraphy have been created using paleomagnetic inclination and polarity measurements on basalt flows from 51 coreholes and 83 surface sites. Paleomagnetic data were used to correlate surface and subsurface basalt stratigraphy, determine relative ages, and, in conjunction with other studies, determine the absolute age of some basalt flows. From stratigraphic top to bottom, key results include: Quaking Aspen Butte flows erupted from Quaking Aspen Butte south of the INL, flowed northeast, and are found in the subsurface in corehole USGS 132. Vent 5206 flows, erupted near the southwestern border of the INL, flowed north and east, and are found in the subsurface in coreholes USGS 132, USGS 129, USGS 131, USGS 127, USGS 130, USGS 128, and STF-AQ-01. Mid Butte flows erupted north of U.S. Highway 20, flowed northwest, and are found in the subsurface at coreholes ARA-COR-005 and STF-AQ-01. High K20 flows erupted from a vent near the Idaho Nuclear Technology and Engineering Center, flowed south and east, and are found in the subsurface in coreholes USGS 131, USGS 127, USGS 130, USGS 128, USGS 123, STF-AQ-01, and ARA-COR-005. Vent 5252 flows erupted just south of U.S. Highway 20 near Middle and East Buttes, flowed northwest and are found in the subsurface in coreholes ARA-COR-005, STF-AQ-01, USGS 130, USGS 128, ICPP 214, USGS 123, ICPP 023, USGS 121, USGS 127, and USGS 131. The Big Lost Reversed Polarity Cryptochron flows erupted from a now-buried vent near the Radioactive Waste Management Complex, flowed southwest to corehole USGS 135, and northeast to coreholes USGS 132, USGS 129, USGS 131, USGS 127, USGS 130, STF-AQ-01, and ARA-COR-005. AEC Butte flows erupted from AEC Butte near the Advanced Test Reactor Complex and flowed south to corehole Middle 1823, northwest to corehole USGS 134, northeast to coreholes USGS 133 and NRF 7P, and south to coreholes USGS 121, ICPP 023, USGS 123, and USGS 128. These results demonstrate that coreholes a few kilometers apart have stratigraphic successions that correlate over tens to hundreds of meters of depth. Correlations between coreholes separated by greater distances are less consistent since some stratigraphic sequences are missing and (or) added, or are at different depths. The Big Lost, AEC Butte, and flows of similar age show subsidence towards the Big Lost Trough. Cross-sections in the southwestern INL, through the unsaturated zone and the top of the saturated zone of the eastern Snake River Plain aquifer show very slight tilting to the southeast towards the Axial Volcanic Zone.

Hodges, M. K.; Davis, L. C.; Champion, D. E.

2010-12-01

157

ELK CREEK STUDY, IDAHO COUNTY IDAHO, 1979  

EPA Science Inventory

In Water Year 1979, the American River, the Red River, and Elk Creek in Idaho County (17060305) were studied to determine their present water quality and to obtain background information on effluent limitations development for the Elk City sewage treatment plant. Quarterly monit...

158

Late Quaternary constructional development of the Axial Volcanic Zone, eastern Snake River Plain, Idaho  

E-print Network

Late Quaternary constructional development of the Axial Volcanic Zone, eastern Snake River Plain volcanic ridge that trends northeast across the middle of the eastern Snake River Plain, and acts, but overlying supergroups emplaced from 515 to 247 ka commonly exhibit a ponded morphology along a construct

Wetmore, Paul H.

159

Hydraulic geometry and sediment data for the South Fork Salmon River, Idaho, 1985-86  

USGS Publications Warehouse

Hydraulic geometry, suspended-sediment, and bedload samples were collected at three sites in the upper reach of the South Fork Salmon River drainage basin from April 1985 to June 1986. Sites selected were South Fork Salmon River near Krassel Ranger Station, Buckhorn Creek, and North Fork Lick Creek. Results of the data collection are presented in this report.

Williams, Rhea P.; O'Dell, Ivalou; Megahan, Walter F.

1989-01-01

160

Hafnium Isotope Composition of Archean Zircons from Xenoliths of the Snake River Plain, Idaho  

Microsoft Academic Search

The composition, structure, spatial extent, and history of Archean crust buried beneath the Snake River Plain (SRP) are important for assessing the role of the lithosphere in regional igneous and tectonic activity. We report the U-Pb age and Hf isotope composition of Archean zircons from xenoliths entrained in Snake River Plain basalts. The xenoliths come from three localities on the

S. A. Dufrane; J. D. Vervoort; W. P. Leeman; D. E. Wolf

2007-01-01

161

WATER QUALITY STATUS REPORT, SALMON RIVER, MAIN STEM (HEADWATERS TO BELOW MIDDLE FORK), IDAHO, 1977  

EPA Science Inventory

Fifteen water quality stations in the Salmon River Basin (17060201, 17060203) were sampled bi-weekly for a year. Eight of the stations were on the Main Salmon River and the remaining seven represented the major tributaries. This portion of the study extended from Stanley to bel...

162

STREAM CHANNEL SEDIMENT CONDITIONS IN THE SOUTH FORK SALMON RIVER, IDAHO, PROGRESS REPORT IV, JUNE 1974  

EPA Science Inventory

The purpose of the South Fork Salmon River (17060208) studies is to determine the condition of the aquatic environment and provide measures needed to maintain or enhance this environment. Prior to 1965, the South Fork Salmon River steadily degraded in quality, due to acceleratio...

163

Results of 2001 Groundwater Sampling in Support of Conditional No Longer Contained-In Determination for the Snake River Plain Aquifer in the Vicinity of the Idaho Nuclear Technology and Engineering Center  

SciTech Connect

This report summarizes the results of sampling five groundwater monitoring wells in the vicinity of the Idaho Nuclear Technology and Engineering Center at the Idaho National Engineering and Environmental Laboratory in 2001. Information on general sampling practices, quality assurance practices, parameter concentrations, representativeness of sampling results, and cumulative cancer risk are presented. The information is provided to support a conditional No Longer Contained-In Determination for the Snake River Plain Aquifer in the vicinity of the Idaho Nuclear Technology and Engineering Center.

Meachum, T.R.

2002-04-26

164

Data summary report on short-term turbidity monitoring of pipeline river crossings in the Moyie River, Boundary County, Idaho: PGT-PG&E Pipeline Expansion Project  

SciTech Connect

A water-quality monitoring program was implemented for Bechtel Corporation to measure the short-term increases in turbidity in the Moyie River caused by construction activities of the Pacific Gas Transmission-Pacific Gas & Electric Pipeline Expansion Project. Construction of the buried, 42-in.-diameter, steel pipeline, during the summer of 1992, involved eight wet crossings of the Moyie River along the 13-mi section of pipeline immediately south of the Canadian-United States border in Boundary County, Idaho. This report summarizes the sampling and analysis protocol used and gives the results and observations for each of the eight crossings. The data obtained from this monitoring program, in addition to satisfying regulatory requirements for the Pipeline Expansion Project, will contribute to an ongoing long-term study of the Moyie River crossings being performed for the Gas Research Institute by Argonne National Laboratory. The purpose of this document is strictly limited to reporting the results of the monitoring program. Interpretation of the data is not within the scope of this report.

Gowdy, M.J.; Smits, M.P.; Wilkey, P.L.; Miller, S.F.

1994-03-01

165

Water resources data, Idaho, 2002; Volume 2. Upper Columbia River basin and Snake River basin below King Hill  

USGS Publications Warehouse

Water resources data for the 2002 water year for Idaho consists of records of stage, discharge, and water quality of streams; stage, contents, and water quality of lakes and reservoirs; discharge of irrigation diversions; and water levels and water quality of groundwater. The two volumes of this report contain discharge records for 196 stream-gaging stations and 15 irrigation diversions; stage only records for 5 stream-gaging stations; stage only for 6 lakes and reservoirs; contents only for 13 lakes and reservoirs; water-quality for 78 stream-gaging stations and partial record sites, 3 lakes sites, and 383 groundwater wells; and water levels for 425 observation network wells and 900 special project wells. Additional water data were collected at various sites not involved in the systematic data collection program and are published as miscellaneous measurements. These data represent that part of the National Water Data System operated by the U.S. Geological Survey and cooperating State and Federal agencies in Idaho, adjacent States, and Canada.

Brennan, T.S.; Lehmann, A.K.; Campbell, A.M.; O'Dell, I.; Beattie, S.E.

2003-01-01

166

Water resources data, Idaho, 2002; Volume 1. Great Basin and Snake River basin above King Hill  

USGS Publications Warehouse

Water resources data for the 2002 water year for Idaho consists of records of stage, discharge, and water quality of streams; stage, contents, and water quality of lakes and reservoirs; discharge of irrigation diversions; and water levels and water quality of groundwater. The two volumes of this report contain discharge records for 196 stream-gaging stations and 15 irrigation diversions; stage only records for 5 stream-gaging stations; stage only for 6 lakes and reservoirs; contents only for 13 lakes and reservoirs; water-quality for 78 stream-gaging stations and partial record sites, 3 lakes sites, and 383 groundwater wells; and water levels for 425 observation network wells and 900 special project wells. Additional water data were collected at various sites not involved in the systematic data collection program and are published as miscellaneous measurements. These data represent that part of the National Water Data System operated by the U.S. Geological Survey and cooperating State and Federal agencies in Idaho, adjacent States, and Canada.

Brennan, T.S.; Lehmann, A.K.; Campbell, A.M.; O'Dell, I.; Beattie, S.E.

2003-01-01

167

Lead exposure in passerines inhabiting lead-contaminated floodplains in the Coeur d'Alene River Basin, Idaho, USA  

SciTech Connect

Blood collected from song sparrows (Melospiza melodia) and American robins (Turdus migratorius) captured with mist nets in a lead-contaminated (assessment) area and nearby uncontaminated (reference) areas within the Coeur d'Alene Basin in northern Idaho was analyzed for [delta]-aminolevulinic acid dehydratase activity (ALAD) and hematocrit levels, and livers were analyzed for lead. Mean ALAD inhibition in the assessment area was 51% in song sparrows and 75% in American robins. The proportion of the sampled population with ALAD inhibition > 50% was calculated to be 43% for song sparrows and 83% for American robins. Assessment area hematocrit values for song sparrows and American robins were lower than in reference areas; however, differences were not statistically significant. Significantly higher levels of lead (wet weight) were found in livers from song sparrows captured on the assessment area ([bar x] = 1.93 ppm) than on reference areas. Study results indicate that 43% of the song sparrows and 83% of the American robins inhabiting the floodplain along the Coeur d'Alene River in the assessment area are being exposed to lead at levels sufficient to inhibit ALAD by > 50%. Variability in lead exposure indicators was attributed to high variability in environmental lead concentrations in the Coeur d'Alene River Basin.

Johnson, G.D.; Kern, J.W.; Strickland, M.D.; McDonald, L.L. (Western EcoSystems Technology, Inc., Cheyenne, WY (United States)); Audet, D.J.; LeCaptain, L.J. (Fish and Wildlife Service, Spokane, WA (United States)); Hoffman, D.J. (Geological Survey, Laurel, MD (United States))

1999-06-01

168

Verification of Precipitation Enhancement due to Winter Orographic Cloud Seeding in the Payette River Basin of Western Idaho  

NASA Astrophysics Data System (ADS)

The Idaho Power Company (IPCo) is a hydroelectric based utility serving eastern Oregon and most of southern Idaho. Snowpack is critical to IPCo operations and the company has invested in a winter orographic cloud seeding program for the Payette, Boise, and Upper Snake River basins to augment the snowpack. IPCo and the National Center for Atmospheric Research (NCAR) are in the middle of a two-year study to determine precipitation enhancement due to winter orographic cloud seeding in the Payette River basin. NCAR developed a cloud seeding module, as an enhancement to the Weather Research and Forecast (WRF) model, that inputs silver iodide released from both ground based and/or aircraft generators. The cloud seeding module then increases the precipitation as a function of the cloud seeding. The WRF model used for this program is run at the University of Arizona with a resolution of 1.8 kilometers using Thompson microphysics and Mellor-Yamada-Janic boundary layer scheme. Two different types of verification schemes to determine precipitation enhancement is being used for this program; model versus model and model versus precipitation gauges. In the model versus model method, a control model run uses NCAR developed criteria to identify the best times to operate cloud or airborne seeding generators and also establishes the baseline precipitation. The model is then rerun with the cloud seeding module turned on for the time periods determined by the control run. The precipitation enhancement due to cloud seeding is then the difference in precipitation between the control and seeding model runs. The second verification method is to use the model forecast precipitation in the seeded and non-seeded areas, compare against observed precipitation (from mainly SNOTEL gauges), and determine the precipitation enhancement due to cloud seeding. Up to 15 SNOTEL gauges in or near the Payette River basin along with 14 IPCo high resolution rain gauges will be used with this target/control method during future phases of the study. Additionally, the IPCo precipitation gauges record to a hundredth of an inch (vice a tenth of an inch for SNOTELs) and can be used to determine precipitation enhancement from both individual storm systems as well as seasonal precipitation. Results of both the model to model and model to rain gauge comparisons from the first year of the project will be presented.

Holbrook, V. P.; Kunkel, M. L.; Blestrud, D.

2013-12-01

169

Lead in hawks, falcons and owls downstream from a mining site on the Coeur d'Alene River, Idaho.  

PubMed

Mining and smelting at Kellogg-Smelterville, Idaho, resulted in high concentrations of lead in Coeur d'Alene (CDA) River sediments and the floodplain downstream, where American Kestrels (Falco sparverius), Northern Harriers (Circus cyaneus), Red-tailed Hawks (Buteo jamaicensis), Great Horned Owls (Bubo virginianus), and Western Screech-owls (Otus kennicotti) nested. Nestling American Kestrels contained significantly higher (P=0.0012) blood lead concentrations along the CDA River (0.24 µg/g, wet wt) than the nearby reference area (0.087 µg/g). A 35% inhibition of blood ?-aminolevulinic acid dehydratase (ALAD) in nestling Northern Harriers (P=0.0001), 55% in nestling American Kestrels (P=0.0001) and 81% in adult American Kestrels (P=0.0004) provided additional evidence of lead exposure in the CDA River population. In nestling American Kestrels and Northern Harriers, ALAD activity was negatively correlated with lead in blood. An earlier report on Ospreys (Pandion haliaetus) showed slightly less inhibition of ALAD than in American Kestrels, but no significant reduction in hemoglobin or hematocrit and no negative influence on production rates. The adult and nestling American Kestrels along the CDA River contained about twice as much blood lead as Ospreys during the same years (adult 0.46 vs. 0.20 µg/g, and nestling 0.24 vs. 0.09 µg/g), but adults showed a 7.5% reduction in hemoglobin (P=0.0356) and nestlings an 8.2% reduction in hemoglobin (P=0.0353) and a 5.8% reduction in hematocrit (P=0.0482). We did not observe raptor deaths related to lead, and although the production rate for American Kestrels was slightly lower along the CDA River, we found no significant negative relation between productivity and lead. Limited data on the other raptors provide evidence of exposure to lead along the CDA River. Several traits of raptors apparently reduce their potential for accumulating critical levels of lead which is primarily stored in bones of prey species. PMID:24221348

Henny, C J; Blus, L J; Hoffman, D J; Grove, R A

1994-02-01

170

Lead in hawks, falcons and owls downstream from a mining site on the Coeur D'Alene river, Idaho  

USGS Publications Warehouse

Mining and smelting at Kellogg-Smelterville, Idaho, resulted in high concentrations of lead in Coeur d'Alene (CDA) River sediments and the floodplain downstream, where American Kestrels (Falco sparverius), Northern Harriers (Circus cyaneus), Red-tailed Hawks (Buteo jamaicensis), Great Horned Owls (Bubo virginianus), and Western Screech-owls (Otus kennicotti) nested. Nestling American Kestrels contained significantly higher (P=0.0012) blood lead concentrations along the CDA River (0.24 ?g/g, wet wt) than the nearby reference area (0.087 ?g/g). A 35% inhibition of blood *-aminolevulinic acid dehydratase (ALAD) in nestling Northern Harriers (P=0.0001), 55% in nestling American Kestrels (P=0.0001) and 81% in adult American Kestrels (P=0.0004) provided additional evidence of lead exposure in the CDA River population. In nestling American Kestrels and Northern Harriers, ALAD activity was negatively correlated with lead in blood. An earlier report on Ospreys (Pandion haliaetus) showed slightly less inhibition of ALAD than in American Kestrels, but no significant reduction in hemoglobin or hematocrit and no negative influence on production rates. The adult and nestling American Kestrels along the CDA River contained about twice as much blood lead as Ospreys during the same years (adult 0.46 vs. 0.20 ?g/g, and nestling 0.24 vs. 0.09 ?g/g), but adults showed a 7.5% reduction in hemoglobin (P=0.0356) and nestlings an 8.2% reduction in hemoglobin (P=0.0353) and a 5.8% reduction in hematocrit (P=0.0482). We did not observe raptor deaths related to lead, and although the production rate for American Kestrels was slightly lower along the CDA River, we found no significant negative relation between productivity and lead. Limited data on the other raptors provide evidence of exposure to lead along the CDA River. Several traits of raptors apparently reduce their potential for accumulating critical levels of lead which is primarily stored in bones of prey species.

Henny, C.J.; Blus, L.J.; Hoffman, D.J.; Grove, R.A.

1994-01-01

171

HENRY'S FORK AND SNAKE RIVER BASIN, IDAHO - WATER QUALITY REPORT, 1973  

EPA Science Inventory

Reported problems in the Henrys Fork and Snake River Basin (17040202, 17040203, 17040201) include bacteria levels exceeding water quality standards, dissolved oxygen standards violations, and excessive algal blooms resulting in aesthetic problems and contributing to DO depression...

172

Tectonic implications of the heat flow of the western Snake River Plain, Idaho  

Microsoft Academic Search

Heat-flow values within the western Snake River Plain average about 1.7 ..mu..cal\\/cm² sec, but even higher values are measured in granitic rocks along the margins of the Snake River Plain (2.5 ..mu..cal\\/cm² sec or higher). The heat-flow distribution is related to the combined effects of crustal thermal refraction and a large, transient crustal heat source. A regional model consistent with

CHARLES A. BROTT; DAVID D. BLACKWELL; JOHN C. MITCHELL

1978-01-01

173

Effects of municipal wastewater discharges on aquatic communities, Boise River, Idaho  

USGS Publications Warehouse

Aquatic communities in the Boise River were examined from October 1987 to March 1988 to determine whether they were adversely affected by trace elements in effluents from two Boise wastewater treatment facilities. Trace-element concentrations in the Boise River were less than or near analytical-detection levels and were less than chronic toxicity criteria when detectable. Insect communities colonizing artificial substrates upstream and downstream from the wastewater treatment facilities were strongly associated, and coefficients of community loss indicated that effluents had benign enriching effects. The distributions of trace-element-intolerant mayflies indicated that trace-element concentrations in effluents did not adversely affect intolerant organisms in the Boise River. Condition factor of whitefish was significantly increased downstream from the Lander Street wastewater treatment facility and was significantly decreased downstream from the West Boise wastewater treatment facility.

Frenzel, S. A.

1990-01-01

174

Effects of municipal wastewater discharges on aquatic communities, Boise River, Idaho  

SciTech Connect

Aquatic communities in the Boise River were examined from October 1987 to March 1988 to determine whether they were adversely affected by trace elements in effluents from two Boise wastewater treatment facilities. Trace-element concentrations in the Boise River were less than or near analytical-detection levels and were less than chronic toxicity criteria when detectable. Insect communities colonizing artificial substrates upstream and downstream from the wastewater treatment facilities were strongly associated, and coefficients of community loss indicated that effluents had benign enriching effects. The distributions of trace-element-intolerant mayflies indicated that trace-element concentrations in effluents did not adversely affect intolerant organisms in the Boise River. Condition factor of whitefish was significantly decreased downstream from the West Boise wastewater treatment facility.

Frenzel, S.A. (Geological Survey, Boise, ID (USA))

1990-04-01

175

The role of episodic fire-related debris flows on long-term (103-104) sediment yields in the Middle Fork Salmon River Watershed, in central Idaho  

Microsoft Academic Search

Episodic fire-related debris flows contribute large amounts of sediment and large woody debris to streams. This study evaluates fire-related sedimentation from small steep tributaries of the Middle Fork Salmon River (MFSR) in central Idaho to evaluate the timing, frequency, and magnitude of episodic fire-related sedimentation on long-term (10 3-10 4) sediment yields. The MFSR lies within the Northern Rocky Mountains

K. E. Riley; J. L. Pierce; A. Hopkins

2010-01-01

176

Microsatellite evidence of invasion and rapid spread of divergent New Zealand mudsnail ( Potamopyrgus antipodarum ) clones in the Snake River basin, Idaho, USA  

Microsoft Academic Search

We used microsatellites to assess genetic diversity and spatial structuring of the invasive apomictic New Zealand mudsnail\\u000a (Potamopyrgus antipodarum) in the initial focal area of its recent North American invasion, a portion of the upper Snake River basin (Idaho) that is\\u000a segmented by a series of hydropower dams. Thirty-four samples (812 total snails) from a 368 km reach of this drainage

Robert Hershler; Hsiu-Ping Liu; William H. Clark

2010-01-01

177

Paleomagnetic correlation of the surface and subsurface stratigraphy in the southern part of the Idaho National Laboratory, eastern Snake River Plain, Idaho  

Microsoft Academic Search

To refine the geologic framework used in conceptual and numerical models of groundwater flow and contaminant transport at and near the Idaho National Laboratory (INL), cross sections of the subsurface stratigraphy have been created using paleomagnetic inclination and polarity measurements on basalt flows from 51 coreholes and 83 surface sites. Paleomagnetic data were used to correlate surface and subsurface basalt

M. K. Hodges; L. C. Davis; D. E. Champion

2010-01-01

178

BACTERIOLOGY AND ALGAL ASSAYS, LOWER SNAKE RIVER RESERVOIRS, IDAHO AND WASHINGTON, 1977  

EPA Science Inventory

The purpose of this portion of the study is to determine 1) the overall water quality of the impoundment area, and 2) to determine the effect of impoundment on bacterial water quality. Data from the pre-impoundment study indicated that the Snake and Clearwater Rivers (17060103) ...

179

Characterize and Quantify Residual Steelhead in the Clearwater River, Idaho, 1999-2000 Progress Report.  

SciTech Connect

During 1999-2002 we determined whether size at release and release site influenced emigration success and survival of hatchery steelhead smolts raised at Dworshak National Fish Hatchery and released into the Clearwater River drainage. We marked 4,500 smolts each year with Passive Integrated Transponder Tags (PIT-tags) which enabled us to track emigration and estimate survival through mainstem Snake and Columbia river dams. Hatchery steelhead raised in System I freshwater were significantly smaller than those raised in warmer System II re-use water (196 mm, 206 mm, 198 mm and 201 mm System I; 215 mm, 213 mm, 206 mm and 209 mm System II). However, there was no significant difference in detection rates to mainstem observation sites between the two groups (65%, 58%, 78% and 55% System I; 69%, 59%, 74% and 53% System II). Survival estimates to Lower Granite Dam were also not significant between the two groups (72%, 81%, 80% and 77% System I; 77%, 79%, 77%, and 72% System II). Smolts less than 180 mm FL were less likely to be detected than larger smolts. Hatchery steelhead smolts released into Clear Creek, the South Fork Clearwater River and the Clearwater River at Dworshak National Fish Hatchery had significantly different lengths each year, but there was no discernible pattern due to random egg takes and rearing systems. Detection rates to mainstem observation sites for smolts released into Clear Creek were significantly less than the other two groups in all years except 2002 (62%, 57%, 71%, and 57% Clear Creek; 68%, 63%, 73% and 61% South Fork Clearwater River; 70%, 59%, 78% and 55% Clearwater River). However, survival rates to Lower Granite Dam were not significantly different (73%, 65%, 78%, and 77% Clear Creek; 79%, 72%, 79% and 76% South Fork Clearwater River; 81%, 76%, 80% and 83% Clearwater River). Similar to the size at release group, smolts less than 180 mm FL were less likely to get detected than larger smolts. Smolts from both size at release and release site groups that were mature at tagging rarely migrated downstream. If smolts migrated they did it in the same year they were released, as less than 0.02% were observed migrating the second year. We sampled the Clearwater River, North Fork Clearwater River, Bedrock Creek, Big Canyon Creek, Cottonwood Creek, Jacks Creek and the Dworshak National Fish Hatchery adult ladder to collect residual hatchery steelhead. We PIT-tagged and released 3,651 hatchery steelhead and collected 645 hatchery steelhead for coded wire tags. Most residual hatchery steelhead were caught within 4 rkm of Dworshak National Fish Hatchery. Hatchery steelhead sampled in the North Fork Clearwater River and the Dworshak Hatchery adult ladder were significantly larger than those sampled in the Clearwater River and lower tributaries in all years except 2001 (205 mm, 205 mm, 223 mm and 238 mm North Fork Clearwater River; 190 mm, 182 mm, 226 mm and 189 mm Clearwater River). Of the hatchery steelhead we PIT-tagged, only 12% were observed at downstream observation sites. Most migrants were tagged in the Clearwater River (91%) and were smaller than hatchery steelhead that were tagged but were not detected. Most migrants were detected in the same year they were tagged, but 14% held over and migrated in the second year after tagging. We documented migration outside of the normal window, as one detection occurred on October 31 at Lower Granite Dam. We recaptured 130 individual hatchery steelhead that we had tagged during sampling. Over 77% of the recaptures were within one km of where they were tagged, and 67% of the recaptures were tagged in the North Fork Clearwater River and the Dworshak Hatchery adult ladder. We calculated a mean growth rate of 0.27 mm/day for fish we recaptured. For those hatchery steelhead we PIT-tagged, the proportion of males was 13%, the rest we could not ascertain gender. All the males were precocious. Over 97% of the coded-wire tag recoveries came from hatchery steelhead released at Dworshak National Fish Hatchery. The Contribution group (random egg take and rearing system) comp

Brostrom, Jody K. (US Fish and Wildlife Service, Idaho Fishery Resource Office, Ahsahka, ID)

2006-08-01

180

Thermal and tectonic implications of heat flow in the eastern Snake River Plain, Idaho  

Microsoft Academic Search

Geothermal data from 248 wells and drill holes, a thermal model for the effects of the Snake Plain aquifer on observed heat flow, an estimate of the regional heat flow in the eastern Snake River Plain, a detailed moving source, regional thermal model, and a discussion of the origin and the relationship of the eastern and western halves of the

Charles A. Brott; David D. Blackwell; John P. Ziagos

1981-01-01

181

Thermal and Tectonic Implications of Heat Flow in the Eastern Snake River Plain, Idaho  

Microsoft Academic Search

Geothermal data from 248 wells and drill holes, a thermal model for the effects of the Snake Plain aquifer on observed heat flow, an estimate of the regional heat flow in the eastern Snake River Plain, a detailed moving source, regional thermal model, and a discussion of the origin and the relationship of the eastern and western halves of the

Charles A. Brott; David D. Blackwell; John P. Ziagos

1981-01-01

182

Origin of hybrid ferrolatite lavas from Magic Reservoir eruptive center, Snake River Plain, Idaho  

Microsoft Academic Search

The mineralogy and geochemical characteristics of intermediate composition ferrolatites and related lavas from the Magic Reservoir eruptive center (central Snake River Plain) have been investigated to evaluate the origin and petrologic significance of these hybrid lavas. The ferrolatites are chemically uniform, but contain a disequilibrium phenocryst\\/xenocryst assemblage derived in part from mixed rhyolitic and basaltic magmas that are closely represented

Norio Honjo; William P. Leeman

1987-01-01

183

Subsidence of a volcanic basin by flexure and crustal flow: The eastern Snake River Plain, Idaho  

Microsoft Academic Search

The Eastern Snake River Plain (ESRP) is a linear volcanic basin interpreted by many workers to reflect late Cenozoic migration of North America over the Yellowstone hotspot. Thermal subsidence of this volcanic province with respect to Yellowstone has been documented by several workers, but no one has characterized subsidence with respect to the adjacent Basin and Range Province. This paper

Nadine McQuarrie I; David W. Rodgers

184

Results of the 2004 GPS Study of Extension Rates in the Eastern Snake River Plain, Idaho  

Microsoft Academic Search

Previous investigators suggest the eastern Snake River Plain (ESRP) is extending by dike intrusion, which enables it to keep pace with SW-NE extension that is occurring in the surrounding Basin and Range Province. Northwest-trending, linear eruptive fissures and aligned volcanic vents within ESRP volcanic rift zones provide observational evidence for dike intrusion in the ESRP as recent as 2000 yrs

J. Chadwick; S. Payne

2004-01-01

185

Evolution of Quaternary Tholeiitic Basalt Eruptive Centers on the Eastern Snake River Plain, Idaho  

Microsoft Academic Search

The tectonic and magmatic evolution of Quaternary olivine tholeiites in the eastern Snake River Plain (SRP) are evaluated by their spatial distribution and geochemi- cal signatures. Individual lava-flow groups and their as- sociated shield-building eruptive centers are either ex- posed at the surface or inferred to exist beneath overly- ing volcanic layers. Stratigraphy and dimensions of over- lapping subsurface flow

Scott S. Hughes; Paul H. Wetmore; Jason L. Casper

2002-01-01

186

Mixing primitive and evolved olivine tholeiite magmas in the Eastern Snake River Plain, Idaho  

Microsoft Academic Search

Butte 5206, a small monogenetic olivine tholeiite basalt (OTB) shield in the Eastern Snake River Plain (ESRP), erupted during late-Pleistocene time along the Arco–Big Southern Butte Volcanic Rift Zone. Geochemical data from Butte 5206 and other basalts that erupted in the vicinity, including correlated samples from coreholes, are evaluated for possible mechanisms of magma evolution in the ESRP. Thermodynamic and

Myles L. Miller; Scott S. Hughes

2009-01-01

187

Volcanism of the Eastern Snake River Plain, Idaho: A comparative planetary geology-guidebook  

Microsoft Academic Search

The Planetary Geology Field Conference on the central Snake River Plain was conceived and developed to accomplish several objectives. Primarily, field conferences are sponsored by the National Aeronautics and Space Administration to draw attention to aspects of terrestrial geology that appear to be important in interpreting the origin and evolution of extraterrestrial planetary surfaces. Another aspect is to present results

R. Greeley; J. S. King

1977-01-01

188

Genesis of a Chemically Enriched Olivine Tholeiite from the Eastern Snake River Plain, Idaho  

Microsoft Academic Search

The eastern Snake River Plain (ESRP) volcanic province is overlain by 1-2 km of dominantly Quaternary olivine tholeiite lava flows associated with the Yellowstone hotspot. A second highly evolved geochemical basalt suite has been identified in previous studies, typified by the lava flows of Craters of the Moon National Monument (COM). Geochemical data from three new coreholes drilled on the

C. G. Chadwick; S. S. Hughes; M. McCurry; J. Chadwick

2004-01-01

189

Mafic Volcanism and Environmental Geology of the Eastern Snake River Plain, Idaho  

Microsoft Academic Search

Geology presented in this field guide covers a wide spectrum of internal and surficial processes of the eastern Snake River Plain, one of the largest components of the combined late Cenozoic ig- neous provinces of the western United States. Focus is on Qua- ternary basaltic plains volcanism that produced monogenetic coa- lescent shields, and phreatomagmatic eruptive centers that pro- duced

Scott S. Hughes; Richard P. Smith; William R. Hackett; Steven R. Anderson

1999-01-01

190

Integrated geophysical studies of the Fort Worth Basin (Texas), Harney Basin (Oregon), and Snake River Plain (Idaho)  

NASA Astrophysics Data System (ADS)

Geophysical methods such as seismic, gravity, magnetics, electric, and electromagnetics are capable of identifying subsurface features but each has a different spatial resolution. Although, each of these methods are stand-alone tools and have produced wonderful and reliable results for decades to solve geological problems, integrating geophysical results from these different methods with geological and geospatial data, adds an extra dimension towards solving geological problems. Integration techniques also involve comparing and contrasting the structural and tectonic evolution of geological features from different tectonic and geographic provinces. I employed 3D and 2D seismic data, passive seismic data, and gravity and magnetic data in three studies and integrated these results with geological, and geospatial data. Seismic processing, and interpretation, as well as filtering techniques applied to the potential filed data produced many insightful results. Integrated forward models played an important role in the interpretation process. The three chapters in this dissertation are stand-alone separate scientific papers. Each of these chapters used integrated geophysical methods to identify the subsurface features and tectonic evolution of the study areas. The study areas lie in the southeast Fort Worth Basin, Texas, Harney Basin, Oregon, and Snake River Plain, Idaho. The Fort Worth Basin is one of the most fully developed shale gas fields in North America. With the shallow Barnett Shale play in place, the Precambrian basement remains largely unknown in many places with limited published work on the basement structures underlying the Lower Paleozoic strata. In this research, I show how the basement structures relate to overlying Paleozoic reservoirs in the Barnett Shale and Ellenburger Group. I used high quality, wide-azimuth, 3D seismic data near the southeast fringe of the Fort Worth Basin. The seismic results were integrated with gravity, magnetic, well log, and geospatial data to understand the basement and sub-basement structures in the study area. Major tectonic features including the Ouachita thrust-fold belt, Lampasas arch, Llano uplift, and Bend arch surround the southeast Fort Worth Basin. The effects of these tectonic units in the basement were imaged in form of faulted and folded basement and sub-basement layers. Euler deconvolution and integrated forward gravity modeling were employed to extend the interpretations beyond the 3D seismic survey into a regional context. The Harney Basin is a relatively flat lying depression in the northeast portion of the enigmatic High Lava Plains volcanic province in eastern Oregon. In addition to the High Lava Plains active source seismic data, I also employed gravity, magnetic, digital elevation, geologic maps, and other geospatial data in this integrated study. I generated an upper crustal 3D seismic tomographic model of the Harney Basin and surrounding area using the active source seismic data. I then integrated it with gravity, magnetic, and geologic data to produce a geophysical model of the upper crustal structure, which reveals that the basin reaches as deep as 6 km in the central areas. I observed two major caldera shaped features within the basin. These calderas reveal seismic low velocity areas along with low gravity and magnetic anomalies. I interpreted the extent of these calderas with the help of integrated geophysical results. I propose a nested caldera complex in the northern Harney Basin and another caldera in the southern part. The Snake River Plain is an arcuate-shaped topographic low that lies in southern Idaho. This rifted valley is filled by large volume of mafic magma with numerous exposures of silicic volcanic centers. The scientific discussion on the structural complexities and evolution of the Snake River Plain and the role of extension in its formation has been going on for decades. Similarly, high gravity and magnetic anomalies are associated with the Snake River Plains, and their possible causes are still the subject of many studies. Numerous recent

Khatiwada, Murari

191

Lead-rich sediments, Coeur d'Alene River Valley, Idaho: area, volume, tonnage, and lead content  

USGS Publications Warehouse

In north Idaho, downstream from the Coeur d?Alene (CdA) silver-lead-zinc mining district, lead-rich sediments, containing at least 1,000 ppm of lead, cover approximately 61 km2 (or 73 percent) of the 84-km2 floor of the CdA River valley, from the confluence of its North and South Forks to the top of its delta-front slope, in CdA Lake. Concentrations of lead (Pb) in surface sediments range from 15 to about 38,500 ppm, and average 3,370 ppm, which is 112 times the mean background concentration (30 ppm) of Pb in uncontaminated sediments of the CdA and St. Joe River valleys. Most of the highest concentrations of Pb are in sediments within or near the river channel, or near the base of the stratigraphic section of Pb-rich sediments. Ranges of Pb concentration in Pb-rich sediments gradually decrease with increasing distance from the river and its distributaries. Ranges of thickness of Pb-rich sediments generally decrease abruptly with increasing distance from the river, from about 3 + 3 m in the river channel to about 1 + 1m on upland riverbanks, levees and sand splays, to about 0.3 + 0.3 m in back-levee marshes and lateral lakes. Thickness of Pb-rich dredge spoils (removed from the river and deposited on Cataldo-Mission Flats) is mostly in the range 4 + 4 m, thinning away from an outfall zone north and west of the river, near the formerly dredged channel reach near Cataldo Landing. We attribute lateral variation in ranges of thickness and Pb content of Pb-rich sediments to the dynamic balance between decreasing floodwater flow velocity with increasing distance from the river and the quantity, size, density, and Pb content of particles mobilized, transported, and deposited. We present alternative median- and mean-based estimates of the volume of Pbrich sediments, their wet and dry tonnage, and their tonnage of contained Pb. We calculate separate pairs of estimates for 23 Estimation Units, each of which corresponds to a major depositional environment, divided into down-valley segments. We favor median-based estimates of the thickness and thickness-interval weighted-average Pb concentration, because uncommonly thick and Pb-rich sections may excessively influence mean estimates. Nevertheless, data from partial sections of Pb-rich sediments are included in most estimates, and these tend to reduce both median- and mean-based estimates. Median-based estimates indicate a volume of 32 M m3 of Pb-rich sediments in the CdA River valley, with a dry tonnage of 47 + 4 M t, containing 250 + 75 kt of Pb (considering analytical uncertainties only). An equivalent tonnage of dry CdA River valley sediments of the pre-mining era, with the mean background concentration of 30 ppm of Pb, would contain about 1.4 kt of Pb. Thus, the amount of Pb added to CdA River valley sediments deposited since the onset of mining is estimated as 249 + 75 kt of Pb, or about 99.5 percent of the estimated Pb contained. Of an estimated 850 + 10 kt of Pb lost to streams as a result of mining-related activities, an estimated total of 739 + 319 kt of Pb has been deposited in sediments of the South Fork drainage basin, the CdA River valley, and the bottom of CdA Lake (combined). Based on mid-range values from a set of preferred estimates with uncertainty ranges up to + 50 percent, roughly 24 percent of the 850 + 10 kt of mining-derived Pb lost to streams has been added to sediments of the South Fork drainage basin, 29 percent to sediments of the CdA River valley floor, and 34 percent to sediments on the bottom of CdA Lake. This amounts to roughly 87 percent of the Pb lost to streams, not including Pb contained in sediments of the North Fork drainage basin and the Spokane River valley, the tonnages of which have not yet estimated.

Bookstrom, Arthur A.; Box, Stephen E.; Campbell, Julie K.; Foster, Kathryn I.; Jackson, Berne L.

2001-01-01

192

Characterize and Quantify Residual Steelhead in the Clearwater River, Idaho, 1999 Annual Report.  

SciTech Connect

Although sample sizes were small during the 1999 field season, we were able to verify at least some residual steelhead survive the winter to persist in the Clearwater River. Hatchery steelhead were found in low numbers migrating up tributaries of the Clearwater River where wild A-run steelhead spawn. Data from this first year did not indicate differences in survival due to size, release site, or rearing system for steelhead reared at Dworshak National Fish Hatchery. This information needs to be compared over several (at least three) years for meaningful analysis. Final analysis will also include influences of water flow and temperature in emigration success. Based on one year of data, the majority of steelhead which do not emigrate during the first couple of weeks after release, are unlikely to emigrate at all.

Bigelow, Patricia E.; Larsen, Chris A. (US Fish and Wildlife Service, Idaho Fishery Resource Office, Ahsahka, ID)

2003-03-01

193

Lead accumulation and osprey production near a mining site on the Coeur d'Alene River, Idaho  

USGS Publications Warehouse

Mining and smelting at Kellogg-Smelterville, Idaho, resulted in high concentrations of lead in Coeur d'Alene (CDA) River sediments 15?65 km downstream, where ospreys (Pandion haliaetus) nested. Adult and nestling ospreys living along the CDA River had significantly higher blood lead concentrations than those at Lake Coeur d'Alene (intermediate area) or Pend Oreille and Flathead Lakes (reference areas). Lead concentrations in fish collected from the study areas paralleled those found in ospreys. Inhibition of blood *-aminolevulinic acid dehydratase (ALAD) activity and elevation of protoporphyrin concentration provided evidence of lead exposure. In adult ospreys, ALAD activity was negatively correlated with lead in blood (r=?0.57), whereas protoporphyrin was positively correlated with lead in blood (r=+0.40). Neither hemoglobin nor hematocrit was adversely affected by the relatively modest lead concentrations found in the blood. Pronounced accumulation of lead by adults or young could ultimately result in behavioral abnormalities or death, both of which would reduce productivity of the nesting osprey population. We did not observe death related to lead, behavioral abnormalities, or reduced productivity during this 1986?87 study. Despite some lead-induced biochemical changes in blood parameters, ospreys produced young at nearly identical rates in the three study areas; these rates were among the highest ever reported in the western United States. Post-fledging survival of ospreys exposed to lead early in life remains an unknown. Lead does not biomagnify in the food chain as do organochlorine pesticides and mercury and several osprey behavior traits reduce the potential for the species to accumulate critical levels of lead. Swans, which feed at a lower trophic level, continue to die from environmental lead in the region.

Henny, C.J.; Blus, L.J.; Hoffman, D.J.; Grove, R.A.; Hatfield, J.S.

1991-01-01

194

Lead exposure in passerines inhabiting lead-contaminated floodplains in the Coeur d'Alene River Basin, Idaho, USA  

USGS Publications Warehouse

Blood collected from song sparrows (Melospiza melodia) and American robins (Turdus migratorius) captured with mist nets in a lead-contaminated (assessment) area and nearby uncontaminated (reference) areas within the Coeur d'Alene Basin in northern Idaho was analyzed for d-aminolevulinic acid dehydratase activity (ALAD) and hematocrit levels, and livers were analyzed for lead. Mean ALAD inhibition in the assessment area was 51% in song sparrows and 75% in American robins. The proportion of the sampled population with ALAD inhibition >50% was calculated to be 43% for song sparrows and 83% for American robins. Assessment area hematocrit values for song sparrows (0 = 39.9) and American robins (0 = 39.5) were lower than in reference areas (0 = 42.4 for song sparrows and 40.2 for American robins); however, differences were not statistically significant (p > 0.05). Significantly higher levels of lead (wet weight) were found in livers from song sparrows captured on the assessment area (0 = 1.93 ppm) than on reference areas (0 = 0.10 ppm) (p = 0.0079). Study results indicate that 43% (95% confidence interval [CI] = 12.9-77.5%) of the song sparrows and 83% (95% CI = 41.8-99.2%) of the American robins inhabiting the floodplain along the Coeur d'Alene River in the assessment area are being exposed to lead at levels sufficient to inhibit ALAD by > 50%. Variability in lead exposure indicators was attributed to high variability in environmental lead concentrations in the Coeur d'Alene River Basin.

Johnson, G.D.; Audet, D.J.; Kern, J.W.; LeCaptain, L.J.; Strickland, M.D.; Hoffman, D.J.; McDonald, L.L.

1999-01-01

195

Regional geophysical setting of the Yellowstone Hotspot track along the Snake River Plain, Idaho, USA  

Microsoft Academic Search

We present an overview of the regional geophysical setting of the Yellowstone Hotspot track along the Snake River Plain (SRP) and surrounding regions in support of a proposed scientific drilling program for one of the world's youngest, best-preserved intra-continental hotspots. The preliminary scientific drilling plan is to core a series of intermediate-depth drill holes near the axes of the western

J. M. Glen; S. J. Payne; C. Bouligand; C. M. Helm-Clark; D. E. Champion

2006-01-01

196

A new look at geothermal energy potential of the eastern Snake River Plain, Idaho  

Microsoft Academic Search

Passage of the Yellowstone plume beneath the Eastern Snake River Plain (ESRP) left a wake of silicic batholiths and associated 4 to 6 Ma rhyolitic tuffs, a 1 km thick sequence of post 4 Ma basalt lava flows, and high heat flow comparable to that of the Basin-and-Range province. U.S.G.S. (United States Geological Survey) Circular 790 estimates that accessible resources

R. P. Smith; D. D. Faulder; S. M. Jackson; W. R. Hackett

1990-01-01

197

KAr dating quaternary and Neogene volcanic rocks of the Snake River Plain, Idaho  

Microsoft Academic Search

Ninety-eight K-Ar dates for lavas of the Snake River Plain (SRP) and vicinity provide calibration for the stratigraphic framework discussed by Malde and Powers (1962). The Idavada Volcanics, predominantly silicic volcanic rocks, are 9 to 13 m.y. old in the western SRP. Rocks of similar type and comparable stratigraphic position are 8 to 10 m.y. old in the central SRP

R. L. Armstrong; W. P. Leeman; H. E. Malde

1975-01-01

198

Petrogenesis of Parental and Evolved Olivine Tholeiite Magmas, Eastern Snake River Plain, Idaho  

Microsoft Academic Search

Geochemical variations in over 500 whole-rock corehole and surface samples representing ~40 individual eruptions of olivine tholeiites on the eastern Snake River Plain (ESRP) portray a system with two major mechanisms of petrogenesis and possibly several magmatic sources in the mantle. Parental liquids, those with high MgO and low incompatible elements (MgO ~7.5-11.2 wt. %; La ~7-19 ppm; Ba ~100-290

S. S. Hughes; D. J. Geist; M. McCurry

2006-01-01

199

Accommodation of Right-lateral Shear Along the Northwest Boundary of the Snake River Plain, Idaho  

Microsoft Academic Search

The northwest boundary of the Snake River Plain (SRP) is a transition from range-bounding normal faults in the Centennial tectonic belt (CTB) to the topographically low and volcanic-dominated province of the SRP. Within the CTB, the northern and central segments of three prominent NW-trending normal faults are seismically active, but their activity decreases southward toward the SRP. Deformation in the

S. J. Payne; R. W. King; S. A. Kattenhorn; R. McCaffrey

2008-01-01

200

Irrigated acreage and other land uses on the Snake River Plain, Idaho and eastern Oregon  

Microsoft Academic Search

Single-date digital multispectral scanner data were analyzed to delineate land-use classes. Source of irrigation water (surface water, ground water, and combined) was determined from county maps of 1975 water-related land use, data from previous investigations, and field checking. In 1980, about 3.1 million acres of the Snake River Plain were irrigated: 2.0 million acres with surface water, 1.0 million with

G. F. Lindholm; S. A. Goodell

1984-01-01

201

Ground water in the Raft River Basin, Idaho, with special reference to irrigation use, 1956-60  

USGS Publications Warehouse

In the Raft River basin in south-central Idaho, ground-water withdrawals for irrigation have more than doubled since 1955, when data were compiled for a comprehensive report on the area. The present report summerizes data on the ground-water use and changes in the water regimen during the intervening 5 years. Water levels have declined 10 to 20 feet in the areas of heaviest pumping and 3 to 5 feet throughout the remainder of the area. These water-level declines are related to increased ground-water pumpage and below-normal precipitation in the basin. The total pumpage during the 1960 irrigation season is estimated to be about 127,000 acre-feet, of which about half was consumed by crops or evaporated. The remainder returned to the aquifer. Irrigation development is acting to reduce the amount of underflow out of the basin. The water table can be lowered considerably more before underflow from the basin would be reduced substantially.

Mundorff, Maurice John; Sisco, H. G.

1963-01-01

202

Biotic integrity of the Boise River upstream and downstream from two municipal wastewater treatment facilities, Boise, Idaho, 1995-96  

USGS Publications Warehouse

Aquatic biological communities were used to assess the biotic integrity of the Boise River upstream and downstream from the Lander Street and West Boise municipal wastewater treatment facilities (WTFs) in Boise, Idaho. Samples of epilithic periphyton, benthic macroinvertebrates, and fish were collected in late February and early March 1995, in late October 1996, and in early December 1996. Epilithic periphyton biomass, expressed as chlorophyll-a and ash-free dry weight, declined substantially between 1995 and 1996. Chlorophyll-a concentrations were higher at sites downstream from WTFs in both years, but differences in concentrations between sites upstream and downstream from WTFs were not statistically significant. High withinsite variance suggests that greater sampling intensity would improve statistical comparison. Index of Biotic Integrity (IBI) scores calculated for benthic macroinvertebrates were higher for the sites upstream from WTFs in 1995 and were the same for all sites in 1996. Similarly, IBI scores calculated for fish were higher for the sites upstream from WTFs in 1995, were higher for the site upstream from the Lander Street WTF in 1996, and were the same for sites upstream and downstream from the West Boise WTF in 1996. Two species of sculpin (Cottus) were abundant at the site upstream from both WTFs but were absent at all other sites downstream from WTFs in 1995 and composed only 2 percent of the total number of fish collected downstream from the Lander Street WTF in 1996.

Mullins, William H.

1999-01-01

203

Review of potential interactions between stocked rainbow trout and listed Snake River sockeye salmon in Pettit Lake Idaho  

SciTech Connect

The objective of this study was to determine if hatchery rainbow trout compete with or prey on juvenile Snake River sockeye salmon Oncorhynchus nerka in Pettit Lake, Idaho. In 1995, a total of 8,570 age-0 sockeye and 4,000 hatchery rainbow trout were released in Pettit Lake. After releasing the fish, gillnets were set in the pelagic and littoral zones to collected diet and spatial distribution data. Interactions were assessed monthly from June 1995 through March 1996. Competition for food was discounted based on extremely low diet overlap results observed throughout the sample period. Conversely, predation interactions were more significant. A total of 119 rainbow trout stomachs were analyzed, two contained O. nerka. The predation was limited to one sample period, but when extrapolated to the whole rainbow trout populations results in significant losses. Total consumption of O. nerka by rainbow trout ranged from an estimated 10 to 23% of initial stocking numbers. Predation results contradict earlier findings that stocked rainbow trout do not prey on wild kokanee or sockeye in the Sawtooth Lakes. The contradiction may be explained by a combination of poorly adapted hatchery sockeye and a littoral release site that forced spatial overlap that was not occurring in the wild populations. Releasing sockeye in the pelagic zone may have reduced or eliminated predation losses to rainbow trout.

Teuscher, D.

1996-05-01

204

Late Holocene hydroclimate change inferred from ?18O of lake sediments, Lost River Range, Idaho  

NASA Astrophysics Data System (ADS)

High-resolution paleohydrological records are needed to assess the frequency and magnitude of past droughts in Idaho and the northern Rocky Mountain region, but are scarce in this semi-arid region. Sediments from Lost Keys Pond (LKP) can be used to reconstruct hydroclimate. LKP is closed to surface outflow and is therefore sensitive to precipitation minus evaporation; surface water is enriched in ?18O compared to the local meteoric waters. In summer 2011 several sediment cores were collected from LKP using a square rod piston corer; the focus of this analysis is an 82-cm Bolivia core. This core contains thinly banded to laminated, authigenic carbonate mud, a recorder of lake ?18O at the time of deposition. This core was sampled for ?18O and /?13C at 0.5 cm intervals, and the <20 um fraction was isolated to avoid any detrital carbonate. Based on the current age model, sampling at this interval records sub-decadal (5-10 year) hydroclimate variability. The ?18O signal recovered has 5‰ variability over the length of the record, including several major fluctuations in last 1,000 years. During this period, several major dry and wet periods have been recorded occurring over multidecadal timescales, with a trend toward increasing aridity. The ?18O and ?13C records in the lowest decimeter are divergent and mirror each other, above this interval isotopic records have strong covariance. This pattern may be indicative of a change from surface outflow to no surface outflow conditions. The age model is being refined to better assess how this record correlates with other regional records, and ultimately improve our understanding of past atmospheric circulation.

Krueger, C. R.; Finney, B. P.; Shapley, M.

2012-12-01

205

IDAHO WATER USER RECOMMENDATIONS MAINSTEM PLAN  

E-print Network

IDAHO WATER USER RECOMMENDATIONS ON THE MAINSTEM PLAN COLUMBIA RIVER BASIN FISH AND WILDLIFE PROGRAM SUBMITTED ON BEHALF OF THE COMMITTEE OF NINE AND THE IDAHO WATER USERS ASSOCIATION JUNE 15, 2001.................................................................................11 Consideration of Upper Snake Power Impacts

206

Víz alatti volt-e a mio-pliocén vulkánosság a Snake-síksági vulkánvidéken (Idaho, USA)? — Terepi megfigyelések, mint az ?skörnyezeti rekonstrukció eszközei How subaqueous was the volcanism in the Mio\\/Pliocene Snake River Plain (Idaho, USA) volcanic field? — Volcanological field observations as tools to reconstruct palaeoenvironments  

Microsoft Academic Search

The western Snake River Plain volcanic field in South-west Idaho is considered to be an extensive Mio-Pliocene volcanic field that formed voluminous lava shields, pahoehoe lava fields, scoria cones, and great variety of phreatomagmatic volcanoes. In many ways the Snake River Plain volcanic field is considered as a special type of volcanic fields, where broad, large volume shield volcanoes form

NÉMETH KÁROLY; CRAIG WHITE

207

Aquifer-test results, direction of ground-water flow, and 1984-90 annual ground-water pumpage for irrigation, lower Big Lost River Valley, Idaho  

USGS Publications Warehouse

The study area (see index map of Idaho), part of the Big Lost River drainage basin, is at the northern side of the eastern Snake River Plain. The lower Big Lost River Valley extends from the confluence of Antelope Creek and the Big Lost River to about 4 mi south of Arco and encompasses about 145 mi2 (see map showing water-level contours). The study area is about 18 mi long and, at its narrowest, 4 mi wide. Arco, Butte City, and Moore, with populations of 1,016, 59, and 190, respectively, in 1990, are the only incorporated towns. The entire study area, except the extreme northwestern part, is in Butte City. The study area boundary is where alluvium and colluvium pinch out and abut against the White Knob Mountains (chiefly undifferentiated sedimentary rock with lesser amounts of volcanic rock) on the west and the Lost River Range (chiefly sedimentary rock) on the east. Gravel and sand in the valley fill compose the main aquifer. The southern boundary is approximately where Big Lost River valley fill intercalates with or abuts against basalt of the Snake River Group. Spring ground-water levels and flow in the Big Lost River depend primarily on temperature and the amount and timing of precipitation within the entire drainage basin. Periods of abundant water supply and water shortages are, therefore, related to the amount of annual precipitation. Surface reservoir capacity in the valley (Mackay Reservoir, about 20 mi northwest of Moore) is only 20 percent of the average annual flow of the Big Lost River (Crosthwaite and others, 1970, p. 3). Stored surface water is generally unavailable for carryover from years of abundant water supply to help relieve drought conditions in subsequent years. Many farmers have drilled irrigation wells to supplement surface-water supplies and to increase irrigated acreage. Average annual flow of the Big Lost River below Mackay Reservoir near Mackay (gaging station 13127000, not shown) in water years 1905, 1913-14, and 1920-90 was about 224,600 acre-ft; average annual flow of the Big Lost River near Arco (gaging station 13132500; see map showing water-level contours) in water years 1947-61, 1967-80, and 1983-90 was about 79,000 acre-ft (Harenberg and others, 1991, p. 254-255). Moore Canal and East Side Ditch divert water from the Big Lost River at the Moore Diversion, 3 mi north of Moore (see map showing water-level contours) and supply water for irrigation near the margins of the valley. When water supply is average or greater, water in the Big Lost River flows through the study area and onto the Snake River Plain, where it evaporates or infiltrates into the Snake River Plain aquifer. When water supply is below average, water in the Big Lost River commonly does not reach Arco; rather, it is diverted for irrigation in the interior of the valley, evaporates, or infiltrates to the valley-fill aquifer. This report describes the results of a study by the U.S. Geological Survey, in cooperation with the Idaho Department of Water Resources, to collect hydrologic data needed to help address water-supply problems in the Big Lost River Valley. Work involved (1) field inventory of 81 wells, including 46 irrigation wells; (2) measurement of water levels in 154 wells in March 1991; (3) estimation of annual ground-water pumpage for irrigation from 1984 through 1990; and (4) analysis of results of an aquifer test conducted southwest of Moore. All data obtained during this study may be inspected at the U.S. Geological Survey, Idaho District office, Boise.

Bassick, M. D.; Jones, M. L.

1992-01-01

208

Bimodal magmatism, basaltic volcanic styles, tectonics, and geomorphic processes of the eastern Snake River Plain, Idaho  

USGS Publications Warehouse

Geology presented in this field guide covers a wide spectrum of internal and surficial processes of the eastern Snake River Plain, one of the largest components of the combined late Cenozoic igneous provinces of the western United States. Focus is on widespread Quaternary basaltic plains volcanism that produced coalescent shields and complex eruptive centers that yielded compositionally evolved magmas. The guide is constructed in several parts beginning with discussion sections that provide an overview of the geology followed by road directions, with explanations, for specific locations. The geology overview briefly summarizes the collective knowledge gained, and petrologic implications made, over the past few decades. The field guide covers plains volcanism, lava flow emplacement, basaltic shield growth, phreatomagmatic eruptions, and complex and evolved eruptive centers. Locations and explanations are also provided for the hydrogeology, groundwater contamination, and environmental issues such as range fires and cataclysmic floods associated with the region.

Hughes, S.S.; Smith, R.P.; Hackett, W.R.; McCurry, M.; Anderson, S.R.; Ferdock, G.C.

1997-01-01

209

Gas Bubble Trauma Monitoring in the Clearwater River Drainage, Idaho 1998.  

SciTech Connect

Select portions of the Clearwater and North Fork of the Clearwater rivers were electroshocked to estimate the incidence of gas bubble trauma (GBT) occurring in resident fish populations for the spring and summer months of 1998. The study area was divided into four sections and sampled weekly during periods of spill and non-spill from Dworshak Dam. Five thousand five hundred and forty one fish, representing 22 different species, were captured and examined for GBT. Two fish were detected with signs of GBT; exhibiting the lowest incidence of GBT in the last four years (0.04%). Reduced discharge and lower levels of total dissolved gases may have resulted in lower incidence of GBT in the 1998 monitoring period.

Cochnauer, Tim

1998-12-01

210

Streamflow monitoring and statistics for development of water rights claims for Wild and Scenic Rivers, Owyhee Canyonlands Wilderness, Idaho, 2012  

USGS Publications Warehouse

The U.S. Geological Survey, in cooperation with the Bureau of Land Management (BLM), collected streamflow data in 2012 and estimated streamflow statistics for stream segments designated "Wild," "Scenic," or "Recreational" under the National Wild and Scenic Rivers System in the Owyhee Canyonlands Wilderness in southwestern Idaho. The streamflow statistics were used by BLM to develop and file a draft, federal reserved water right claim in autumn 2012 to protect federally designated "outstanding remarkable values" in the stream segments. BLM determined that the daily mean streamflow equaled or exceeded 20 and 80 percent of the time during bimonthly periods (two periods per month) and the bankfull streamflow are important streamflow thresholds for maintaining outstanding remarkable values. Prior to this study, streamflow statistics estimated using available datasets and tools for the Owyhee Canyonlands Wilderness were inaccurate for use in the water rights claim. Streamflow measurements were made at varying intervals during February–September 2012 at 14 monitoring sites; 2 of the monitoring sites were equipped with telemetered streamgaging equipment. Synthetic streamflow records were created for 11 of the 14 monitoring sites using a partial?record method or a drainage-area-ratio method. Streamflow records were obtained directly from an operating, long-term streamgage at one monitoring site, and from discontinued streamgages at two monitoring sites. For 10 sites analyzed using the partial-record method, discrete measurements were related to daily mean streamflow at a nearby, telemetered “index” streamgage. Resulting regression equations were used to estimate daily mean and annual peak streamflow at the monitoring sites during the full period of record for the index sites. A synthetic streamflow record for Sheep Creek was developed using a drainage-area-ratio method, because measured streamflows did not relate well to any index site to allow use of the partial-record method. The synthetic and actual daily mean streamflow records were used to estimate daily mean streamflow that was exceeded 80, 50, and 20 percent of the time (80-, 50-, and 20-percent exceedances) for bimonthly and annual periods. Bankfull streamflow statistics were calculated by fitting the synthetic and actual annual peak streamflow records to a log Pearson Type III distribution using Bulletin 17B guidelines in the U.S. Geological Survey PeakFQ program. The coefficients of determination (R2) for the regressions between the monitoring and index sites ranged from 0.74 for Wickahoney Creek to 0.98 for the West Fork Bruneau River and Deep Creek. Confidence in computed streamflow statistics is highest among other sites for the East Fork Owyhee River and the West Fork Bruneau River on the basis of regression statistics, visual fit of the related data, and the range and number of streamflow measurements. Streamflow statistics for sites with the greatest uncertainty included Big Jacks, Little Jacks, Cottonwood, Wickahoney, and Sheep Creeks. The uncertainty in computed streamflow statistics was due to a number of factors which included the distance of index sites relative to monitoring sites, relatively low streamflow conditions that occurred during the study, and the limited number and range of streamflow measurements. However, the computed streamflow statistics are considered the best possible estimates given available datasets in the remote study area. Streamflow measurements over a wider range of hydrologic and climatic conditions would improve the relations between streamflow characteristics at monitoring and index sites. Additionally, field surveys are needed to verify if the streamflows selected for the water rights claims are sufficient for maintaining outstanding remarkable values in the Wild and Scenic rivers included in the study.

Wood, Molly S.; Fosness, Ryan L.

2013-01-01

211

Age dating ground water by use of chlorofluorocarbons (CCl{sub 3}F and CCl{sub 2}F{sub 2}), and distribution of chlorofluorocarbons in the unsaturated zone, Snake River Plain aquifer, Idaho National Engineering Laboratory, Idaho  

SciTech Connect

Detectable concentrations of chlorofluorocarbons (CFC`s) were observed in ground water and unsaturated-zone air at the Idaho National Engineering Laboratory (INEL) and vicinity. The recharge ages of waters were determined to be from 4 to more than 50 years on the basis of CFC concentrations and other environmental data; most ground waters have ages of 14 to 30 years. These results indicate that young ground water was added at various locations to the older regional ground water (greater than 50 years) within and outside the INEL boundaries. The wells drilled into the Snake River Plain aquifer at INEL sampled mainly this local recharge. The Big Lost River, Birch Creek, the Little Lost River, and the Mud Lake-Terreton area appear to be major sources of recharge of the Snake River Plain aquifer at INEL. An average recharge temperature of 9.7{plus_minus}1.3{degrees}C (degrees Celsius) was calculated from dissolved nitrogen and argon concentrations in the ground waters, a temperature that is similar to the mean annual soil temperature of 9{degrees}C measured at INEL. This similarity indicates that the aquifer was recharged at INEL and not at higher elevations that would have cooler soil temperatures than INEL. Soil-gas concentrations at Test Area North (TAN) are explained by diffusion theory.

Busenberg, E.; Weeks, E.P.; Plummer, L.N.; Bartholomay, R.C.

1993-04-01

212

Stream-Sediment Geochemistry in Mining-Impacted Drainages of the Yankee Fork of the Salmon River, Custer County, Idaho  

USGS Publications Warehouse

This reconnaissance study was undertaken at the request of the USDA Forest Service, Region 4, to assess the geochemistry, in particular the mercury and selenium contents, of mining-impacted sediments in the Yankee Fork of the Salmon River in Custer County Idaho. The Yankee Fork has been the site of hard-rock and placer mining, primarily for gold and silver, starting in the 1880s. Major dredge placer mining from the 1930s to 1950s in the Yankee Fork disturbed about a 10-kilometer reach. Mercury was commonly used in early hard-rock mining and placer operations for amalgamation and recovery of gold. During the late 1970s, feasibility studies were done on cyanide-heap leach recovery of gold from low-grade ores of the Sunbeam and related deposits. In the mid-1990s a major open-pit bulk-vat leach operation was started at the Grouse Creek Mine. This operation shut down when gold values proved to be lower than expected. Mercury in stream sediments in the Yankee Fork ranges from below 0.02 ppm to 7 ppm, with the highest values associated with old mill locations and lode and placer mines. Selenium ranges from below the detection limit for this study of 0.2 ppm to 4 ppm in Yankee Fork sediment samples. The generally elevated selenium content in the sediment samples reflect the generally high selenium contents in the volcanic rocks that underlie the Yankee Fork and the presence of gold and silver selenides in some of the veins that were exploited in the early phases of mining.

Frost, Thomas P.; Box, Stephen E.

2009-01-01

213

Temperatures, heat flow, and water chemistry from drill holes in the Raft River geothermal system, Cassia County, Idaho  

SciTech Connect

The Raft River area of Idaho contains a geothermal system of intermediate temperatures (approx. = 150/sup 0/C) at depths of about 1.5 km. Outside of the geothermal area, temperature measurements in three intermediate-depth drill holes (200 to 400 m) and one deep well (1500 m) indicate that the regional conductive heat flow is about 2.5 ..mu..cal/cm/sup 2/ sec or slightly higher and that temperature gradients range from 50/sup 0/ to 60/sup 0/C/km in the sediments, tuffs, and volcanic debris that fill the valley. Within and close to the geothermal system, temperature gradients in intermediate-depth drill holes (100 to 350 m) range from 120/sup 0/ to more than 600/sup 0/C/km, the latter value found close to an artesian hot well that was once a hot spring. Temperatures measured in three deep wells (1 to 2 km) within the geothermal area indicate that two wells are in or near an active upflow zone, whereas one well shows a temperature reversal. Assuming that the upflow is fault controlled, the flow is estimated to be 6 liter/sec per kilometer of fault length. From shut-in pressure data and the estimated flow, the permeability times thickness of the fault is calculated to be 2.4 darcy m. Chemical analyses of water samples from old flowing wells, recently completed intermediate-depth drill holes, and deep wells show a confused pattern. Geothermometer temperatures of shallow samples suggest significant re-equilibration at temperatures below those found in the deep wells. Silica geothermometer temperatures of water samples from the deep wells are in reasonable agreement with measured temperatures, whereas Na-K-Ca temperatures are significantly higher than measured temperatures. The chemical characteristics of the water, as indicated by chloride concentration, are extremely variable in shallow and deep samples. Chloride concentrations of the deep samples range from 580 to 2200 mg/kg.

Nathenson, M.; Urban, T.C.; Diment, W.H.; Nehring, N.L.

1980-01-01

214

Evaluation of well-purging effects on water-quality results for samples collected from the eastern Snake River Plain aquifer underlying the Idaho National Laboratory, Idaho  

USGS Publications Warehouse

This report presents qualitative and quantitative comparisons of water-quality data from the Idaho National Laboratory, Idaho, to determine if the change from purging three wellbore volumes to one wellbore volume has a discernible effect on the comparability of the data. Historical water-quality data for 30 wells were visually compared to water-quality data collected after purging only 1 wellbore volume from the same wells. Of the 322 qualitatively examined constituent plots, 97.5 percent met 1 or more of the criteria established for determining data comparability. A simple statistical equation to determine if water-quality data collected from 28 wells at the INL with long purge times (after pumping 1 and 3 wellbore volumes of water) were statistically the same at the 95-percent confidence level indicated that 97.9 percent of 379 constituent pairs were equivalent. Comparability of water-quality data determined from both the qualitative (97.5 percent comparable) and quantitative (97.9 percent comparable) evaluations after purging 1 and 3 wellbore volumes of water indicates that the change from purging 3 to 1 wellbore volumes had no discernible effect on comparability of water-quality data at the INL. However, the qualitative evaluation was limited because only October-November 2003 data were available for comparison to historical data. This report was prepared by the U.S. Geological Survey in cooperation with the U.S. Department of Energy.

Knobel, LeRoy L.

2006-01-01

215

Hafnium Isotope Composition of Archean Zircons from Xenoliths of the Snake River Plain, Idaho  

NASA Astrophysics Data System (ADS)

The composition, structure, spatial extent, and history of Archean crust buried beneath the Snake River Plain (SRP) are important for assessing the role of the lithosphere in regional igneous and tectonic activity. We report the U-Pb age and Hf isotope composition of Archean zircons from xenoliths entrained in Snake River Plain basalts. The xenoliths come from three localities on the SRP: Square Mountain (SM), Craters of the Moon National Monument (COM) and the Spencer-Kilgore (SK) volcanic field. Cathodoluminescence imaging and previous age dating of the zircons show that many are complexly zoned and for this reason a majority of the Hf isotope data was determined via laser ablation MC-ICPMS. We used a New Wave UP-213 Nd-YAG laser interfaced with a Thermo-Finnigan Neptune MC-ICPMS and Element II HR-ICPMS for Hf isotope determinations U-Pb age dating, respectively. Previous U-Pb age dating has shown that the zircons vary from having simple age systematics (e.g., SM xenolith DM103 has a single zircon age population of ~ 2.58 Ga) to highly complex (e.g., COM xenoliths have zircons with ages populations from 2.7 to 3.2 Ga). All these zircons are Archean in age, although some have young low-U overgrowths jacketing their Archean cores which yield 206Pb/238U ages of ~19-25 Ma. There is no evidence in any of the xenoliths for zircon growth between late Archean and these young ages which attests to the stability of the lithosphere during this span of time. The Hf isotopic compositions of the Archean zircon grains are extremely unradiogenic consistent with their old age. For example, a SM xenolith (DM103) has present-day ?Hf values of -61 to -58 (initial ?Hf values at 2.56 Ga of -5 to -2), comparable with data determined by conventional solution-based methods. Another zircon from a COM xenolith (COM22) has an Archean core (2.7 Ga) and a large overgrowth with an age of ~20 Ma. Remarkably the present day ?Hf values of the core and overgrowth are identical within analytical uncertainties, -76 and -73, respectively. This indicates the young overgrowth consists entirely of recycled Archean crust with no detectable involvement of mantle derived Hf. The low ?Hf values imply little material exchange between Archean crust and SRP melts (typical ?Hf between -10 and +10). The ages (~20 Ma) and the lack of a mantle component of the zircon overgrowths seem to preclude that young zircon growth was produced during SRP magmatism. However, the recent transfer of heat into the Archean basement may provide important clues concerning the processes operative in the lithosphere prior to and perhaps during SRP magmatism.

Dufrane, S. A.; Vervoort, J. D.; Leeman, W. P.; Wolf, D. E.

2007-12-01

216

Source and Crystallization Characteristics of Basalts in the Kimama core: Project Hotspot Snake River Scientific Drilling Project, Idaho  

NASA Astrophysics Data System (ADS)

Mineral chemistry and petrography of basalts from the Kimama drill core recovered by Hotspot: Snake River Scientific Drilling Project, Idaho establish crystallization conditions of these lavas. Twenty-three basalt samples, from 20 individual lava flows were sampled from the upper 1000 m (of the 1912 m drilled) core drilled on the axis of the Snake River Plain, and represent approximately 3 m.y. of volcanism (rocks at the bottom of the hole are ~6 Ma). Rock from the upper 1000 m are typically fresh, while those lower in the core are more altered and are less likely to preserve fresh phenocrysts to analyze. Intratelluric phenocrysts (pre-eruption) are: olivine, plagioclase and Cr-spinel inclusions in olivine and plagioclase; groundmass phases (post-eruption) are: olivine, plagioclase, clinopyroxene, magnetite and ilmenite. Olivine core compositions range from Fo84-68, plagioclase cores range from An80-62, clinopyroxene ranges in composition from Wo47-34, En47-28, Fs30-15, spinel inclusions are Cr (up to 20 wt % Cr2O3) and Al-rich (up to 35 wt % Al2O3) and evolve to lower concentrations of Cr and Al and higher Fe and Ti, chromian titanomagnetite to magnetite, and ilmenite are groundmass oxide phases. Thermobarometry of Kimama core basalts indicates that the phenocryst phases crystallized at temperatures of 1155 to 1255°C at depths of 7 to 17 km, which is within or near the seismically imaged mid-crustal sill. Plagioclase hygrometry suggests that these lavas are relatively anhydrous with less than 0.4 wt % H2O. Groundmass phases crystallized at lower temperatures (<1140°C) after eruption. Oxygen fugacity inferred from Fe-Ti oxide equilibria is at or just below the QFM buffer. The origin of the basaltic rocks of the Snake River Plain has been attributed to a mantle plume or to other, shallow mantle processes. Mineral and whole rock major and trace element geochemistry of the olivine tholeiites from the Kimama core are used to distinguish between these two sources (deep or shallow mantle). Whole rock compositions were corrected for plagioclase and olivine fractionation to calculate primary liquids to estimate mantle potential temperatures. Olivine phenocrysts have the pyroxenite source characteristics of low Mn and Ca, but a peridotite source characteristic of low Ni. Thus, trace element models were used to test whether there is pyroxenite in the source of the Snake River Plain basalts, as hypothesized for Hawaii and other plume-related hotspots (e.g., Sobolev et al., 2005; Herzberg, 2011). Olivine chemistry and trace element models establish that the basalt source is a spinel peridotite, not a pyroxenite. The average mantle potential temperature obtained for these samples is 1577°C, 177°C hotter than ambient mantle, suggesting that the basaltic liquids were derived from a thermal plume. Silica activity barometry shows that melt segregation occurs between 80 and 110 km depth, which is within or very near the spinel stability field, and suggests that the lithosphere has been eroded by the plume to a maximum depth of 80 km, and recent mantle tomography suggests that it may be even thinner.

Bradshaw, R. W.; Christiansen, E. H.; Dorais, M. J.; Shervais, J. W.; Potter, K. E.

2012-12-01

217

Movement of bull trout in the upper Jarbidge River watershed, Idaho and Nevada, 2008-09--A supplement to Open-File Report 2010-1033  

USGS Publications Warehouse

We monitored bull trout (Salvelinus confluentus) in 2008 and 2009 as a continuation of our work in 2006 and 2007, which involved the tagging of 1,536 bull trout with passive integrated transponder (PIT) tags in the East Fork Jarbidge River and West Fork Jarbidge River and their tributaries in northeastern Nevada and southern Idaho. We installed PIT tag interrogation systems (PTISs) at established locations soon after ice-out, and maintained the PTISs in order to collect information on bull trout movements through December of each year. We observed a marked increase of movement in 2008 and 2009. Bull trout tagged in the uppermost portions of the East Fork Jarbidge River at altitudes greater than 2,100 meters moved to the confluence of the East Fork Jarbidge River and West Fork Jarbidge River in summer and autumn. Ten bull trout tagged upstream of the confluence of Pine Creek and the West Fork Jarbidge River moved downstream and then upstream in the East Fork Jarbidge River, and then past the PTIS at Murphy Hot Springs (river kilometer [rkm] 4.1). Two of these fish ascended Dave Creek, a tributary of the East Fork Jarbidge River, past the PTIS at rkm 0.4. One bull trout that was tagged at rkm 11 in Dave Creek on June 28, 2007 moved downstream to the confluence of the East Fork Jarbidge River and West Fork Jarbidge River (rkm 0) on July 28, 2007, and it was then detected in the West Fork Jarbidge River moving past our PTIS at rkm 15 on May 4, 2008. Combined, the extent and types of bull trout movements observed indicated that the primarily age-1 and age-2 bull trout that we tagged in 2006 and 2007 showed increased movement with age and evidence of a substantial amount of fluvial life history. The movements suggest strong connectivity between spawning areas and downstream mainstem areas, as well as between the East Fork Jarbidge River and West Fork Jarbidge River.

Munz, Carrie S.; Allen, M. Brady; Connolly, Patrick J.

2011-01-01

218

Metal Transport, Heavy Metal Speciation and Microbial Fixation Through Fluvial Subenvironments, Lower Coeur D'Alene River Valley, Idaho  

NASA Astrophysics Data System (ADS)

The lower Coeur d'Alene River Valley of northern Idaho is the site of extensive lead and zinc contamination resulting from both direct riverine tailings disposal and flood remobilization of contaminated sediments derived from the Coeur d'Alene mining district upstream. Variations in the hydrologic regime, redox conditions, porosity/permeability, organic content and microbial activity results in complicated metal transport pathways. Documentation of these pathways is a prerequisite to effective remediation, and requires accurate analysis of lateral and vertical variations. An analytical approach combining sequential extraction, electron microscopy, and microanalysis provides a comprehensive assessment of particulate speciation in this complex hydrologic system. Rigorously controlled sample preparation and a new sequential extraction protocol provide unprecedented insight into the role of metal sequestration in fluvial subenvironments. Four subenvironments were investigated: bedload, overbank (levee), marsh, and lacustrine. Periodic floods remobilize primary ore minerals and secondary minerals from upstream tailings (primarily oxyhydroxides, sulfides and carbonates). The bedload in the lower valley is a reducing environment and acts as a sink for detrital carbonates and sulfides moving downstream. In addition, authigenic/biogenic Fe, Pb and Zn sulfides and phosphates are common in bedload sediments near the sediment/water interface. Flood redistribution of oxide, sulfide and carbonate phases results in periodic contaminant recharge generating a complex system of metal dissolution, mobilization, migration and precipitation. In levee environments, authigenic sulfides from flood scouring are quickly oxidized resulting in development of oxide coated grain surfaces. Stability of detrital minerals on the levee is variable depending on sediment permeability, grain size and mineralogy resulting in a complex stratigraphy of oxide zones mottled with zones dominated by detrital and authigenic carbonate and sulfide phases. Marshes subjected to periodic subaerial exposure/flooding are even more complex and dominated by authigenic and biogenic mineralization. Lacustrine environments are dominated by nanocrystalline inorganic and biogenic sulfide minerals in the upper third of the contaminated sediment column with increasing amounts of silt sized detrital sulfides (especially sphalerite) closer to the premining surface. In pH-neutral subenvironments within the wetlands and lateral lakes of the lower Coeur d'Alene River Valley, microbial fixation plays a critical role in sequestering metals. Complex metal oxyhydroxide phases provided via flood recharge to river edge, marsh and lacustrine environments rapidly dissolve upon encountering anoxic conditions. Microbial activity is extremely effective in removing heavy metals from the water column, producing a nanocrystalline biofilm substrate characterized by ZnS (sphalerite) and non-stoichiometric PbS, FeS, and mixed metal sulfides. These solid phases are inherently unstable, and the sequestered metals become readily available through changes in redox or pH conditions, particularly dam-controlled annual fluctuations in base level, or during removal by bottom-feeding aquatic water fowl. The recognition of the inherent complexity and instability of microbially produced sulfidic material in a pH-neutral environment has important implications for remediation efforts utilizing wetland filtration methods.

Hooper, R. L.; Mahoney, J. B.

2001-12-01

219

Predicted climate change effects on streambed scour and risks to Chinook salmon survival in the Middle Fork Salmon River, Idaho  

NASA Astrophysics Data System (ADS)

In response to recent climate warming trends in the Pacific Northwest, the frequency and magnitude of winter floods is expected to increase in some areas where rain-on-snow events occur. Eggs of fall spawning salmonids are incubating in the streambed at this time of year and may be at risk if streambed scour exceeds typical egg burial depths. We investigated how projected trends in streamflow associated with climate change may alter the probability of streambed scour below documented egg burial depths (15-50 cm) for Chinook salmon (Oncorhynchus tshawytscha) in the Middle Fork Salmon River (MFSR), central Idaho. Predictions are made for the magnitude and timing of current and future bankfull flows (approximated by the 2-year flood, Q2) at the basin scale by coupling digital elevation models with empirical predictions of grain size and bankfull shear stress, determined from field surveys of 120 channel reaches distributed throughout the basin. Historic and future values of Q2 were derived from the Variable Infiltration Capacity (VIC) hydrologic model at the scale of 1/16th degree cells. Future predictions of Q2 were derived from the VIC model using output from an ensemble of Global Climate Models under an A1B emissons scenario for the 2040s and 2080s. Predicted changes in both bankfull flow and the probability of scour to egg burial depths were examined at recent spawning sites (1995-2004 surveys) to assess ecological risk. We found that in the low gradient reaches (Slope <3%) where most spawning occurs, the probability of critical scour was consistently <0.1 under the historic scenario. Future scenarios indicated only a small increase in the length of streams subject to scour in the MFSR, and suggested that this high-elevation system could be largely resistant to climate-driven changes in flow, except under extreme warming scenarios. We are currently extending these analyses to lower elevation basins in rain-dominated and transitional (rain and snow) hydroclimates to assess relative scour sensitivities over a wider range of environmental conditions across the Pacific Northwest.

Goode, J.; Buffington, J. M.; Tonina, D.; Isaak, D.; Tetzlaff, D.; Soulsby, C.; Wenger, S.; Thurow, R.; Nagel, D.; Luce, C.

2011-12-01

220

High-precision provenance determination using detrital-zircon ages and petrography of Quaternary sands on the eastern Snake River Plain, Idaho  

SciTech Connect

The Big Lost trough is an upper Pliocene to Holocene sedimentary basin containing volcanic sills in the northeastern Snake River Plain, Idaho. The basin receives sediment primarily from Basin and Range fluvial systems of the Big Lost River, Little Lost River, and Birch Creek. The Big Lost trough contains a >200-m-thick succession of lacustrine, fluvial, eolian, and playa sediments, recording high-frequency Quaternary climatic fluctuations interbedded with basalt flows. Alternating deposition of clay-rich lacustrine sediments and sandy fluvial and eolian sediments in the central part of the basin was in response to the interaction of fluvial and eolian systems with Pleistocene Lake Terreton. The source areas for modern sands from the fluvial systems can be differentiated by using both petrography and U/Pb age spectra from detrital-zircon populations. Provenance data from subsurface sands indicate that the Big Lost trough was supplied with sand largely deposited by the Big Lost River, with local redeposition by eolian processes, similar to the modern depositional system. Provenance and stratigraphic data suggest that during Pleistocene wet climate cycles, the center of the basin was dominated by lacustrine sedimentation; during dry climate cycles, the base level dropped, the Big Lost River prograded across the basin, and the eolian system became active. At least seven climate oscillations are recorded in strata deposited between {approximately}140 and {approximately}1250 ka.

Geslin, J.K.; Link, P.K. [Idaho State Univ., Pocatello, ID (United States). Dept. of Geology] [Idaho State Univ., Pocatello, ID (United States). Dept. of Geology; Fanning, C.M. [Australian National Univ., Canberra (Australia). Research School of Earth Sciences] [Australian National Univ., Canberra (Australia). Research School of Earth Sciences

1999-04-01

221

Scaling the Geomorphic and Ecological Consequences of Contemporary Climate Change Within the Salmon River Watershed, Central Idaho: A View From Taylor Ranch Field Station  

NASA Astrophysics Data System (ADS)

Established in 1970 by the University of Idaho, Taylor Ranch Field Station is located in the Frank Church Wilderness of No Return, along Big Creek, a 1445 km2 tributary to the Middle Fork of the Salmon River. The field station has provided a stable center for terrestrial and aquatic ecological studies within the Salmon River for almost 40 years. Dr. Wayne Minshall began monitoring aquatic ecology indices at numerous sites in the Salmon River basin in the late 1970's. This rare continuum of roughly 30 years of field data can be coupled with publically available hydrologic, geomorphic and meteorological data sets to reveal a rich record of how recent demonstrable changes in climate have affected this wilderness watershed. As a consequence of improved access and automated and telemetered sensors of water quality and quantity, contemporary studies continue through out the watershed at an increasing temporal and spatial resolution. The impetuous is upon current researchers to understand both the role of the basin as a major water source to the Snake and Columbia River systems and also the function of the basin as ideal habitat for threatened native fish. Beyond these applied questions that directly impact management decisions, the pristine nature of much of the Salmon River basin also favors studies of fundamental feedbacks between the physical and biological systems. These interdisciplinary studies are augmented by increasing collections of high resolution spatial data sets such as Hyperspectral Imagery, Distributed Sensor Networks and LiDAR topography. We present a study that explicitly examines the feedbacks between wildfire, sediment production, basin hydrology and aquatic ecosystem function. Because the tributaries to the Salmon River span discrete ranges in elevation across the snow- to rainfall-dominated hydrologic regimes, these studies reveal how sensitive different portions of the Salmon River system are to projected changes in temperature. Depending on the elevation range within a give catchment, these changes will result in different responses in hillslope stability, wildfire susceptibility, stream ecology and channel form.

Crosby, B. T.; Baxter, C. V.

2008-12-01

222

Idaho Yesterdays  

NSDL National Science Digital Library

Idaho is a state of many different moods and climates, and since 1957 Idaho Yesterdays has documented the state's history and transformation through articles, book reviews, and commentary. In 2009, the journal switched to life as a digital peer-reviewed publication. Today, visitors can read the digital issues of the journal, and they will find a range of articles here. Visitors can find full-length articles like "Idaho and the Development of the JCPenney Chain" and "Virgin Forest to Modern Farm: Picturing Ecological Change in Northern Idaho's Cutover Land". Finally, visitors can also register on the site, read announcements, and learn about the Idaho State Historical Society.

223

Effect of activities at the Idaho National Engineering and Environmental Laboratory on the water quality of the Snake River Plain aquifer in the Magic Valley study  

USGS Publications Warehouse

Radiochemical and chemical constituents in wastewater generated at facilities of the Idaho National Engineering and Environmental Laboratory (INEEL) (figure 1) have been discharged to waste-disposal ponds and wells since the early 1950 s. Public concern has been expressed that some of these constituents could migrate through the Snake River Plain aquifer to the Snake River in the Twin Falls-Hagerman area Because of these concerns the U.S. Department of Energy (DOE) requested that the U.S. Geological Survey (USGS) conduct three studies to gain a greater understanding of the chemical quality of water in the aquifer. One study described a one-time sampling effort for radionuclides, trace elements, and organic compounds in the eastern part of the A&B Irrigation District in Minidoka County (Mann and Knobel, 1990). Another ongoing study involves sampling for tritium from 19 springs on the north side of the Snake River in the Twin Falls-Hagerman area (Mann, 1989; Mann and Low, 1994). A third study an ongoing annual sampling effort in the area between the southern boundary of the INEEL and Hagerman (figure 1) (hereafter referred to as the Magic Valley study area), is being conducted with the Idaho Department of Water Resources in cooperation with the DOE. Data for a variety of radiochemical and chemical constituents from this study have been published by Wegner and Campbell (1991); Bartholomay, Edwards, and Campbell (1992, 1993, 1994a, 1994b); and Bartholomay, Williams, and Campbell (1995, 1996, 1997b). Data discussed in this fact sheet were taken from these reports. An evaluation of data collected during the first four years of this study (Bartholomay Williams, and Campbell, 1997a) showed no pattern of water-quality change for radionuclide data as concentrations randomly increased or decreased. The inorganic constituent data showed no statistical change between sample rounds.

Bartholomay, Roy C.

1998-01-01

224

Impacts of Fire and Mass Wasting on Channel Morphology and Stream Temperature in Mountain Rivers of Central Idaho  

Microsoft Academic Search

Debris flows and hyperconcentrated flows immediately impact streams by changing channel morphology, grain size, sediment storage and transport, amount of incision, riparian vegetation, large woody debris dynamics, and extirpating fish, amphibian, and insect populations. In central Idaho, these disturbances are commonly triggered by intense thunderstorms or rain-on-snow events, and are exacerbated by wildfires which alter basin hydrology and sediment supply

C. W. Welcker; J. M. Buffington; B. E. Rieman; C. H. Luce; J. McKean

2004-01-01

225

A Journey of Surprises: Rivers Reveal Their Secrets to Idaho Students Researching Water Quality through Rigorous Scientific Inquiry.  

ERIC Educational Resources Information Center

Idaho secondary students learn the scientific method through outdoor environmental projects related to water quality monitoring. A program trains teachers to design project-based learning and provides extensive followup support. Five-day summer workshops immerse teachers in the types of projects they will orchestrate with their own students.…

Boss, Suzie

2002-01-01

226

Time-dependent inversion of three-component GPS time series for steady and transient effects of the Yellowstone Hotspot on the Snake River Plain, Idaho  

NASA Astrophysics Data System (ADS)

Crustal deformation in the Northern Basin and Range and Snake River Plain results from extension overprinted by volcanism associated with the Yellowstone Hotspot. The Snake River Plain is a seismically quiet, low-relief physiographic feature that extends from eastern Oregon through southern Idaho and into northwestern Wyoming. The Northern Basin and Range surrounds the Snake River Plain and is distinguished by its higher elevations, higher rates of seismicity, and active normal faulting. Horizontal GPS velocities indicate the strain rate in the Snake River Plain is an order of magnitude lower than in the Northern Basin and Range and that a zone of right-lateral shear extends along the northern Snake River Plain boundary to accommodate the different strain rates. The 2004-2009 inflation of the Yellowstone caldera and subsidence adjacent to northern caldera rim resulting from magma intrusion and withdrawal are transient effects embedded in GPS velocities and may impact interpretations of regional kinematics. We invert continuous GPS time series from Plate Boundary Observatory (PBO) along with survey-mode GPS site time series to estimate simultaneously the long-term steady motions and short-term transient magma intrusion in the Snake River Plain and Northern Basin and Range. We model the magma intrusion as Mogi sources beneath the Yellowstone caldera at shallow depths. The steady motions are described by crustal block rotations and strain rates that together predict spatially smooth variations in surface velocities. We estimate fault locking and block rotations that have been corrected for transient motions resulting from magma intrusion. From this we estimate that the magmatic deformation outside of the caldera at distances of 160-180 km, where we observe the largest differential strain rates, contributes less than about 0.3 mm/yr to the overall velocities and does not contribute to the difference in strain rates currently observed.

Payne, S. J.; McCaffrey, R.; King, R. W.

2009-12-01

227

Measurement of crustal flexure in the Lake Hills, South Central Idaho and Timing of Eastern Snake River Plain Subsidence  

NASA Astrophysics Data System (ADS)

Late Miocene rhyolite along the north flank of the Eastern Snake River Plain (ESRP) near Carey, Idaho, was studied to investigate the flexure and subsidence history of the ESRP. The rhyolite has been divided into three formations that include seven individual ignimbrite flows. A petrology study of 26 vitrophyre samples, from the lower 4 flows, revealed 3 distinct formations based on percentage of small, large and skeletal feldspars, degree of welding and percentage of glomerocysts. Formations Tiv O (oldest) and Tiv Y (youngest) are indistinguishable in hand sample and in outcrop; however, the middle formation, Tiv M, harbors a distinct phenocryst-poor and thin vitrophyre. New 40Ar/39Ar analysis yields ages of 9.21±0.18 Ma and 9.16±0.20 Ma for Tiv O, 8.39±0.54 Ma for Tiv M and 8.76±0.38 Ma for Tiv Y. Field mapping and measurement of ignimbrite compaction foliations delineates three structural domains. Together the three domains exhibit a map-scale east-trending flexural antiform. Domain 1 extends 0-4 km north of the ESRP. Stratigraphically up section, southerly dips have an average of Tiv O 10°, Tiv M 7°, Tiv Y 7° and for Quaternary basalt 5°. With a slightly undulating topography, Domain 2 stretches 4-6 km north of the ESRP and displays dips of 10-21° to the north and south. All unit groups are present within Domain 2; however, in numerous locals Tiv M is directly underlain by Challis volcanics (Tcv) and where Tiv O is present, the unit is thinner. Domain 3 extends 6-12km north of the ESRP and has predominantly north dipping foliations between 10-21°. As in Domain 2, Tiv O is thinner or not present throughout domain 3. We interpret the formation of the antiform as a crustal flexure response to the subsidence of the ESRP. The northward thinning of Tiv O, suggests a topographic high in the previous paleotopography within Domain 2 and the initiation of the subsidence of the ESRP prior to rhyolite deposition. Two distinct angular unconformities between Tiv O-Tiv Y and Tiv Y-Qb, further indicate that subsidence continued during and after the emplacement of the rhyolite. Previous studies of crustal flexure along the northern edge of the ESRP have been conducted at Howe Point (100 km NE of the Lake Hills) and Lidy Hot Springs (130 km NE of Lake Hills). Together with the new data from the Lake Hills presented within, over 130 km of crustal flexure has been identified and analyzed along the northern boundary of the ESRP. The Lake Hills experienced flexure before, during and after ignimbrite deposition. Two episodes of flexure occurred at Howe Point. Major flexure (25°) occurred from 16-10 Ma while minor flexure commenced after 6.0 Ma. Lidy Hot springs experienced major flexure before 7-10 Ma and minor flexure after 6.0 Ma. Major flexure and ESRP subsidence has been was previously proposed to signify an isostatic crustal response to the emplacement of plutonic loads below the ESRP. However, initiation of crustal flexure preceded the emplacement of Yellowstone hotspot ignimbrites in all three locations. Only minor flexure has been identified in all three locations during or after ignimbrite deposition, suggesting plutonic loading had already occurred prior to ignimbrite deposition.

Michalek, M.; Rodgers, D. W.

2007-12-01

228

Mineralogic variations in fluvial sediments contaminated by mine tailings as determined from AVIRIS data, Coeur D'Alene River Valley, Idaho  

NASA Technical Reports Server (NTRS)

The success of imaging spectrometry in mineralogic mapping of natural terrains indicates that the technology can also be used to assess the environmental impact of human activities in certain instances. Specifically, this paper describes an investigation into the use of data from the Airborne Visible/Infrared Imaging Spectrometer (AVIRIS) for mapping the spread of, and assessing changes in, the mineralogic character of tailings from a major silver and base metal mining district. The area under investigation is the Coeur d'Alene River Valley in northern Idaho. Mining has been going on in and around the towns of Kellogg and Wallace, Idaho since the 1880's. In the Kellogg-Smelterville Flats area, west of Kellogg, mine tailings were piled alongside the South Fork of the Coeur d'Alene River. Until the construction of tailings ponds in 1968 much of these waste materials were washed directly into the South Fork. The Kellogg-Smelterville area was declared an Environmental Protection Agency (EPA) Superfund site in 1983 and remediation efforts are currently underway. Recent studies have demonstrated that sediments in the Coeur d'Alene River and in the northern part of Lake Coeur d'Alene, into which the river flows, are highly enriched in Ag, Cu, Pb, Zn, Cd, Hg, As, and Sb. These trace metals have become aggregated in iron oxide and oxyhydroxide minerals and/or mineraloids. Reflectance spectra of iron-rich tailing materials are shown. Also shown are spectra of hematite and goethite. The broad bandwidth and long band center (near 1 micron) of the Fe(3+) crystal-field band of the iron-rich sediment samples combined with the lack of features on the Fe(3+) -O(2-) charge transfer absorption edge indicates that the ferric oxide and/or oxyhydroxide in these sediments is poorly crystalline to amorphous in character. Similar features are seen in poorly crystalline basaltic weathering products (e.g., palagonites). The problem of mapping and analyzing the downriver occurrences of iron rich tailings in the Coeur d'Alene (CDA) River Valley using remotely sensed data is complicated by the full vegetation cover present in the area. Because exposures of rock and soil were sparse, the data processing techniques used in this study were sensitive to detecting materials at subpixel scales. The methods used included spectral mixture analysis and a constrained energy minimization technique.

Farrand, W. H.; Harsanyi, Joseph C.

1995-01-01

229

Idaho Fires  

NASA Technical Reports Server (NTRS)

[figure removed for brevity, see original site] Figure 1 Click on image for larger version

This full-frame ASTER image, acquired August 30, 2000, covers an area of 60 by 60 km in the Salmon River Mountains, Idaho. In this color infrared composite, vegetation is red, clouds are white, and smoke from forest fires is blue. An enlargement (Figure 1) covers an area of 12 x 15 km. A thermal infrared band is displayed in red, a short wave infrared band is displayed in green, and a visible band is displayed in blue. In this combination, fires larger than about 50 m appear yellow because they are bright in both infrared bands. Smaller fires appear green because they are too small to be seen by the 90 m thermal pixels, but large enough to be detected in the 30 m short wave infrared pixels. We are able to see through the smoke in the infrared bands, whereas in the visible bands, the smoke obscures detection of the active fires. This image is located at 44.8 degrees north latitude and 114.8 degrees west longitude.

The U.S. science team is located at NASA's Jet Propulsion Laboratory, Pasadena, Calif. The Terra mission is part of NASA's Science Mission Directorate.

2001-01-01

230

IDAHO WILDERNESS, IDAHO.  

USGS Publications Warehouse

Mineral surveys conducted in the Idaho Wilderness identified 28 areas with probable or substantiated mineral-resource potential, and 5 mines with demonstrated or inferred resources. Metals including gold, silver, copper, lead, zinc, and tungsten, have been extracted from deposits inside the wilderness. Current studies indicate additional areas of probable mineral-resource potential for gold, tungsten, mercury, rare-earth elements, and base metals related to intrusive rocks that follow structures formed by cauldron subsidence. These on-going studies also indicate that there is probable and substantiated resource potential for cobalt with copper, silver, and gold in the Precambrian rocks in the northeastern part of the wilderness in a geologic environment similar to that of the Blackbird mine that lies outside the area. The nature of the geologic terrane precludes the potential for organic fuels.

Cater, Fred, W.; Weldin, R. D.

1984-01-01

231

Stream-sediment geochemistry in mining-impacted streams : sediment mobilized by floods in the Coeur d'Alene-Spokane River system, Idaho and Washington  

USGS Publications Warehouse

Environmental problems associated with the dispersion of metal-enriched sediment into the Coeur d'Alene-Spokane River system downstream from the Coeur d'Alene Mining District in northern Idaho have been a cause of litigation since 1903, 18 years after the initiation of mining for lead, zinc, and silver. Although direct dumping of waste materials into the river by active mining operations stopped in 1968, metal-enriched sediment continues to be mobilized during times of high runoff and deposited on valley flood plains and in Coeur d'Alene Lake (Horowitz and others, 1993). To gauge the geographic and temporal variations in the metal contents of flood sediment and to provide constraints on the sources and processes responsible for those variations, we collected samples of suspended sediment and overbank deposits during and after four high-flow events in 1995, 1996, and 1997 in the Coeur d'Alene-Spokane River system with estimated recurrence intervals ranging from 2 to 100 years. Suspended sediment enriched in lead, zinc, silver, antimony, arsenic, cadmium, and copper was detected over a distance of more than 130 mi (the downstream extent of sampling) downstream of the mining district. Strong correlations of all these elements in suspended sediment with each other and with iron and manganese are apparent when samples are grouped by reach (tributaries to the South Fork of the Coeur d'Alene River, the South Fork of the Coeur d'Alene River, the main stem of the Coeur d'Alene River, and the Spokane River). Elemental correlations with iron and manganese, along with observations by scanning electron microscopy, indicate that most of the trace metals are associated with Fe and Mn oxyhydroxide compounds. Changes in elemental correlations by reach suggest that the sources of metal-enriched sediment change along the length of the drainage. Metal contents of suspended sediment generally increase through the mining district along the South Fork of the Coeur d'Alene River, decrease below the confluence of the North and South Forks, and then increase again downstream of the gradient flattening below Cataldo. Metal contents of suspended sediment in the Spokane River below Coeur d'Alene Lake were comparable to those of suspended sediment in the main stem of the Coeur d'Alene River above the lake during the 1997 spring runoff, but with somewhat higher Zn contents. Daily suspended-sediment loads were about 100 times larger in the 1996 flood (50-100-year recurrence interval) than in the smaller 1997 floods (2-5-year recurrence intervals). Significant differences in metal ratios and contents are also apparent between the two flood types. The predominant source of suspended sediment in the larger 1996 flood was previously deposited, metal-enriched flood-plain sediment, identified by its Zn/Pb ratio less than 1. Suspended sediment in the smaller 1997 floods had metal ratios distinct from those of the flood-plain deposits and was primarily derived from metal-enriched sediment stored within the stream channel, identified by a Zn/Pb ratio greater than 1. Sediment deposited during overbank flooding on the immediate streambank or natural levee of the river typically consists of sandy material with metal ratios and contents similar to those of the sandy streambed sediment in the adjacent river reach. Samples of overbank deposits in backlevee marshes collected after the 1996 flood have metal ratios similar to those of peak-flow suspended sediment in the same river reach, but generally lower metal contents.

Box, Stephen E.; Bookstrom, Arthur A.; Ikramuddin, Mohammed

2005-01-01

232

Movements of Fluvial Bonneville Cutthroat Trout in the Thomas Fork of the Bear River, Idaho–Wyoming  

Microsoft Academic Search

The majority of interior subspecies of cutthroat trout Oncorhynchus clarkii have been extirpated from large rivers by anthropogenic activities that have fragmented habitats and introduced nonnative competitors. Selective pressures against migratory behaviors and main-stem river occupation, coupled with conservation strategies that isolate genetically pure populations above barriers, have restricted gene flow and prevented expression of the fluvial life history in

Warren T. Colyer; Jeffrey L. Kershner; Robert H. Hilderbrand

2005-01-01

233

Origin and stratigraphy of phreatomagmatic deposits at the Pleistocene Sinker Butte Volcano, Western Snake River Plain, Idaho  

Microsoft Academic Search

Sinker Butte is the erosional remnant of a very large basaltic tuff cone of middle Pleistocene age located at the southern edge of the western Snake River Plain. Phreatomagmatic tephras are exposed in complete sections up to 100 m thick in the walls of the Snake River Canyon, creating an unusual opportunity to study the deposits produced by this volcano

Brittany D. Brand; Craig M. White

2007-01-01

234

Origin and stratigraphy of phreatomagmatic deposits at the Pleistocene Sinker Butte Volcano, Western Snake River Plain, Idaho  

Microsoft Academic Search

Sinker Butte is the erosional remnant of a very large basaltic tuff cone of middle Pleistocene age located at the southern edge of the western Snake River Plain. Phreatomagmatic tephras are exposed in complete sections up to 100 m thick in the walls of the Snake River Canyon, creating an unusual opportunity to study the deposits produced by this volcano through

Brittany D. Brand; Craig M. White

2007-01-01

235

Magma Flow and the Redistribution of Crystals in Shallow Intrusions at Sinker Butte Volcano, Western Snake River Plain, Idaho  

Microsoft Academic Search

Sinker Butte is the erosional remnant of one of the largest tholeiitic volcanoes in the western Snake River Plain. Because the edifice was dissected by the Snake River, a nearly complete record of its eruptions is exposed in the walls and alcoves of the canyon. The stratigraphy indicates that initial eruptions produced a shield cone composed of many thin pahoehoe

C. M. White; K. R. Kurz

2007-01-01

236

Water resources data, Idaho, 2003; Volume 1. Surface water records for Great Basin and Snake River basin above King Hill  

USGS Publications Warehouse

Water resources data for the 2003 water year for Idaho consists of records of stage, discharge, and water quality of streams; stage, contents, and water quality of lakes and reservoirs; discharge of irrigation diversions; and water levels and water quality of groundwater. The three volumes of this report contain discharge records for 208 stream-gaging stations and 14 irrigation diversions; stage only records for 6 stream-gaging stations; stage only for 6 lakes and reservoirs; contents only for 13 lakes and reservoirs; water-quality for 50 stream-gaging stations and partial record sites, 3 lakes sites, and 398 groundwater wells; and water levels for 427 observation network wells and 900 special project wells. Additional water data were collected at various sites not involved in the systematic data collection program and are published as miscellaneous measurements. Volumes 1 & 2 contain the surface-water and surface-water-quality records. Volume 3 contains the ground-water and ground-water-quality records. These data represent that part of the National Water Data System operated by the U.S. Geological Survey and cooperating State and Federal agencies in Idaho, adjacent States, and Canada.

Brennan, T.S.; Lehmann, A.K.; O'Dell, I.

2004-01-01

237

Water resources data, Idaho, 2004; Volume 1. Surface water records for Great Basin and Snake River basin above King Hill  

USGS Publications Warehouse

Water resources data for the 2004 water year for Idaho consists of records of stage, discharge, and water quality of streams; stage, contents, and water quality of lakes and reservoirs; discharge of irrigation diversions; and water levels and water quality of groundwater. The three volumes of this report contain discharge records for 209 stream-gaging stations and 8 irrigation diversions; stage only records for 6 stream-gaging stations; stage only for 6 lakes and reservoirs; contents only for 13 lakes and reservoirs; water-quality for 39 stream-gaging stations and partial record sites, 3 lakes sites, and 395 groundwater wells; and water levels for 425 observation network wells and 900 special project wells. Additional water data were collected at various sites not involved in the systematic data collection program and are published as miscellaneous measurements. Volumes 1 & 2 contain the surface-water and surface-water-quality records. Volume 3 contains the ground-water and ground-water-quality records. These data represent that part of the National Water Data System operated by the U.S. Geological Survey and cooperating State and Federal agencies in Idaho, adjacent States, and Canada.

Brennan, T.S.; Lehmann, A.K.; O'Dell, I.

2005-01-01

238

Water information bulletin No. 30, part 13: geothermal investigations in Idaho. Preliminary geologic reconnaissance of the geothermal occurrences of the Wood River Drainage Area  

SciTech Connect

Pre-tertiary sediments of the Milligen and Wood River Formations consisting primarily of argillite, quartzite, shale and dolomite are, for the most part, exposed throughout the area and are cut locally by outliers of the Idaho Batholith. At some locations, Tertiary-age Challis Volcanics overlay these formations. Structurally the area is complex with major folding and faulting visible in many exposures. Many of the stream drainages appear to be fault controlled. Hydrologic studies indicate hot spring occurrences are related to major structural trends, as rock permeabilities are generally low. Geochemical studies using stable isotopes of hydrogen and oxygen indicate the thermal water in the Wood River region to be depleted by about 10 0/00 in D and by 1 to 2 0/00 in /sup 18/0 relative to cold water. This suggests the water could be meteoric water that fell during the late Pleistocene. The geological data, as well as the chemical data, indicate the geothermal waters are heated at depth, and subsequently migrate along permeable structural zones. In almost all cases the chemical data suggest slightly different thermal histories and recharge areas for the water issuing from the hot springs. Sustained use of the thermal water at any of the identified springs is probably limited to flow rates approximating the existing spring discharge. 28 refs., 16 figs., 3 tabs.

Anderson, J.E.; Bideganeta, K.; Mitchell, J.C.

1985-04-01

239

Effects of the Cabinet Gorge Kokanee Hatchery on Wintering Bald Eagles in the Lower Clark Fork River and Lake Pend, Oreille, Idaho: 1986 Final Report.  

SciTech Connect

The abundance and distribution of bald eagles (Haliaeetus leucocephalus) on the lower Clark Fork River, Lake Pend Oreille, and the upper Pend Oreille River, Idaho, were documented during the winters of 1985--86 and 1986--87. Peak counts of bald eagles in weekly aerial censuses were higher in 1985--86 (274) and 1986--87 (429) than previously recorded in mid-winter surveys. Differences in eagle distribution within and between years were apparently responses to changes in prey availability. Eight bald eagles were captured and equipped with radio transmitters in the winter and spring of 1986. Residencies within the study area averaged 13.9 days in 1985--86 and 58.3 days for the four eagles that returned in 1986-87. The eagles exhibited considerable daily movement throughout the study area. After departing the area, one eagle was later sighted approximately 1185 km to the southwest in northern California. Eagle behavioral activity was recorded at time budget sessions at areas of heavy use. Perching in live trees was the most common behavior observed. 34 refs., 39 figs., 17 tabs.

Crenshaw, John G.

1987-12-01

240

In Situ Production of Chlorine-36 in the Eastern Snake River Plain Aquifer, Idaho: Implications for Describing Ground-Water Contamination Near a Nuclear Facility  

SciTech Connect

The purpose of this report is to describe the calculated contribution to ground water of natural, in situ produced 36Cl in the eastern Snake River Plain aquifer and to compare these concentrations in ground water with measured concentrations near a nuclear facility in southeastern Idaho. The scope focused on isotopic and chemical analyses and associated 36Cl in situ production calculations on 25 whole-rock samples from 6 major water-bearing rock types present in the eastern Snake River Plain. The rock types investigated were basalt, rhyolite, limestone, dolomite, shale, and quartzite. Determining the contribution of in situ production to 36Cl inventories in ground water facilitated the identification of the source for this radionuclide in environmental samples. On the basis of calculations reported here, in situ production of 36Cl was determined to be insignificant compared to concentrations measured in ground water near buried and injected nuclear waste at the INEEL. Maximum estimated 36Cl concentrations in ground water from in situ production are on the same order of magnitude as natural concentrations in meteoric water.

L. D. Cecil; L. L. Knobel; J. R. Green (USGS); S. K. Frape (University of Waterloo)

2000-06-01

241

Geochronology, paleomagnetism and petrology of the Upper Cenozoic Bruneau Formation in the Western Snake River Plain, Idaho  

Microsoft Academic Search

The combined application of potassium-argon and paleomagnetic techniques revealed an understanding of the sequence of geologic events during the last 2.2 m.y. in the western part of the Snake River Plain. Two factors introduce large errors in the whole-rock K-Ar dating of fine-grained, glass-rich, geologically young Snake River basalts: a low potassium content which is not uniformly distributed; and the

M. H. Amini

1983-01-01

242

Structural analysis of compressional and extensional deformation within the Wood River and Milligen Formations, south-central, Idaho  

SciTech Connect

The Pennsylvanian to Permian Wood River Formation consists of calcareous and siliciclastic rocks that were deposited unconformably on argillaceous rocks of the Devonian Milligen Formation. The original depositional contact between the two formations is preserved locally; however, the contact was also mapped as a thrust, a normal fault, a reactivated thrust with a normal sense of movement, and as a sheared unconformity with an indeterminate sense of movement. Early reverse movement with northeast tectonic transport along the Milligen-Wood River contact is documented by mesoscopic and microscopic field evidence, including Riedel shears, drag folds, angular relations of cleavage in the fault plane, and oriented thin sections. Faults that separate middle Wood River in the upper plate from upper Wood River in the lower plate are also associated with this early phase of thrusting. Tertiary extensional deformation resulted in high-angle and low-angle normal faulting with some reactivation of Mesozoic thrusts. High-angle fault have normal, dip-slip or normal, obliquie-slip movements. Low-angle normal faults with north-west to southwest tectonic transport cut the Milligen and Wood River Formations, as well as units within the Tertiary Challis Volcanics. The movement sense on the normal faults in documented by drag folds, the angular relation of extension joints relative to the fault plane, shear steps, and oriented thin sections. Faults that separate younger sequences of the Wood River in the upper plate from older sequences in the lower plate are also associated with this phase of normal faulting.

Ratchford, M.E.; Reid, R.R. (Univ. of Idaho, Moscow, ID (United States). Dept. of Geology and Geological Engineering)

1993-04-01

243

Depth of emplacement of the Payette River tonalite and tectonic implications for the arc-continent boundary in west-central Idaho  

SciTech Connect

A major lithospheric boundary known as the Salmon River Suture Zone (SRSZ), trends north-south through west-central Idaho, juxtaposing Paleozoic and Proterozoic cratonally-derived sedimentary material to the east against phanerozoic arc-derived material to the west. This boundary zone is the subject of complex and disputed tectonic history. A field, petrographic and geothermobarometric study of a cratonally-derived metasedimentary unit of migmatized pods within the Payette River tonalite (PRT) sheds light on the compressional history and P-T conditions to the east of the SRSZ relative to the time of PRT emplacement as 90[+-]5Ma (Manduca, 1988). The migmitized material is composed of pelitic and calc-silicate metamorphosed sediments of upper amphibolite grade, and quartzite. The migmatites within the PRT show structural evidence of east-west compression both during and after emplacement of the tonalite. Pressure and temperature conditions preserved by the pelitic migmatites at the time of PRT emplacement are at least 5.8 kbar and 700 C, according to GASP barometry and garnet-biotite thermometry coupled with petrographic information. The work of Selverstone et al. (1991) on the Pollack Mountain and Rapid River plates to the west of the suture zone indicates that these units were at pressures less than 4 kbar at 90 Ma. Pressures of >5.8 kbar at 90 Ma determined from rocks east of the suture indicates that the east side of the SRSZ moved upward relative to the west side after 90 Ma. Rocks on both sides of the suture are believed to have reached near-surface conditions by 65 Ma.

Weston, P.; Manduca, C.A. (Carleton College, Northfield, MN (United States)); Selverstone, J. (Univ. of Colorado, Boulder, CO (United States). Dept. of Geological Sciences)

1993-04-01

244

Hydraulic Characteristics of Bedrock Constrictions and Evaluation of One- and Two-Dimensional Models of Flood Flow on the Big Lost River at the Idaho National Engineering and Environmental Laboratory, Idaho  

USGS Publications Warehouse

A 1.9-mile reach of the Big Lost River, between the Idaho National Engineering and Environmental Laboratory (INEEL) diversion dam and the Pioneer diversion structures, was investigated to evaluate the effects of streambed erosion and bedrock constrictions on model predictions of water-surface elevations. Two one-dimensional (1-D) models, a fixed-bed surface-water flow model (HEC-RAS) and a movable-bed surface-water flow and sediment-transport model (HEC-6), were used to evaluate these effects. The results of these models were compared to the results of a two-dimensional (2-D) fixed-bed model [Transient Inundation 2-Dimensional (TRIM2D)] that had previously been used to predict water-surface elevations for peak flows with sufficient stage and stream power to erode floodplain terrain features (Holocene inset terraces referred to as BLR#6 and BLR#8) dated at 300 to 500 years old, and an unmodified Pleistocene surface (referred to as the saddle area) dated at 10,000 years old; and to extend the period of record at the Big Lost River streamflow-gaging station near Arco for flood-frequency analyses. The extended record was used to estimate the magnitude of the 100-year flood and the magnitude of floods with return periods as long as 10,000 years. In most cases, the fixed-bed TRIM2D model simulated higher water-surface elevations, shallower flow depths, higher flow velocities, and higher stream powers than the fixed-bed HEC-RAS and movable-bed HEC-6 models for the same peak flows. The HEC-RAS model required flow increases of 83 percent [100 to 183 cubic meters per second (m3/s)], and 45 percent (100 to 145 m3/s) to match TRIM2D simulations of water-surface elevations at two paleoindicator sites that were used to determine peak flows (100 m3/s) with an estimated return period of 300 to 500 years; and an increase of 13 percent (150 to 169 m3/s) to match TRIM2D water-surface elevations at the saddle area that was used to establish the peak flow (150 m3/s) of a paleoflood with a return period of 10,000 years. A field survey of the saddle area, however, indicated that the elevation of the lowest point on the saddle area was 1.2 feet higher than indicated on the 2-ft contour map that was used in the TRIM2D model. Because of this elevation discrepancy, HEC-RAS model simulations indicated that a peak flow of at least 210 m3/s would be needed to initiate flow across the 10,000-year old Pleistocene surface. HEC-6 modeling results indicated that to compensate for the effects of streambed scour, additional flow increases would be needed to match HEC-RAS and TRIM2D water-surface elevations along the upper and middle reaches of the river, and to compensate for sediment deposition, a slight decrease in flows would be needed to match HEC-RAS water-surface elevations along the lower reach of the river. Differences in simulated water-surface elevations between the TRIM2D and the HEC-RAS and HEC-6 models are attributed primarily to differences in topographic relief and to differences in the channel and floodplain geometries used in these models. Topographic differences were sufficiently large that it was not possible to isolate the effects of these differences on simulated water-surface elevations from those attributable to the effects of supercritical flow, streambed scour, and sediment deposition.

Berenbrock, Charles; Rousseau, Joseph P.; Twining, Brian V.

2007-01-01

245

High-K alkali basalts of the Western Snake River Plain: Abrupt transition from tholeiitic to mildly alkaline plume-derived basalts, Western Snake River Plain, Idaho  

Microsoft Academic Search

article i nfo Basaltic volcanism in the western Snake River Plain underwent an abrupt change circa ~700 ka to 900 ka, from low-K tholeiitic basalt and ferrobasalt to high-K transitional alkali basalt. The low-K tholeiitic basalts share major element, trace element, and isotopic characteristics with olivine tholeiites of the eastern Snake River Plain, and must have been derived by similar

John W. Shervais; Scott K. Vetter

2009-01-01

246

Field evaluation of lead effects on Canada geese and mallards in the Coeur d'Alene River Basin, Idaho  

USGS Publications Warehouse

Hatch year (HY) mallards (Anas platyrhynchos) in the Coeur d'Alene (CDA) River Basin had higher concentrations of lead in their blood than HY Western Canada geese (Branta canadensis moffitti) (geometric means 0.98 versus 0.28 I?g/g, wet weight). The pattern for adults of both species was similar, although geometric means (1.77 versus 0.41 I?g/g) were higher than in HY birds. HY mallards captured in the CDA River Basin in 1987 contained significantly lower lead concentrations in their blood than in 1994a??95 (0.36 versus 0.98 I?g/g); however, some very young mallards were sampled in 1987, and concentrations in adults were not significantly different in 1987, 1994, or 1995 (1.52, 2.07, 1.55 I?g/g, respectively). Both species in the CDA River Basin in 1994a??95 showed significantly reduced red blood cell delta-aminolevulinic acid dehydratase (ALAD) activity compared to the reference areas: Canada geese (HY a??65.4 to a??86.0%, adults a??82.3%), and mallards (HY a??90.7 to a??95.5%, adults a??94.1%). Canada goose goslings were divided into size classes, and the two smaller classes from the CDA River Basin had significantly elevated free erythrocyte protoporphyrin (protoporphyrin) levels compared to the reference area (15.2?? and 6.9??). HY and adult mallards both had significantly elevated protoporphyrin (5.9?? and 7.5??). Recognizing that interspecific differences exist in response and sensitivity to lead, it appears (at least for hemoglobin and hematocrit) that Canada geese were more sensitive to lead than mallards, i.e., adverse hematologic effects occur at lower blood lead concentrations. Only Canada geese from the CDA River Basin, in spite of lower blood lead concentrations, had significantly reduced mean hemoglobin and hematocrit values. No euthanized Canada geese (all HYs) from CDA River Basin were classified as clinically lead poisoned, but 38 Canada geese found dead in the CDA River Basin during a concurrent study succumbed to lead poisoning between 1992 and 1997. Only 6 (15.8%) of these 38 contained ingested lead shot, which contrasts greatly with the 75a??94% incidence of ingested lead shot when mortality was due to lead shot ingestion. Lead from other contaminated sources (i.e., sediments and vegetation) in the CDA River Basin was strongly implicated in most Canada goose deaths. Based on the 31 live mallards and Canada geese collected in the CDA River Basin, which were representative of the live populations blood sampled only, the prevalence of subclinical and clinical lead poisoning (as determined by liver lead concentrations, excluding birds with ingested lead shot) was higher in mallards: subclinical (4 of 8, 50% HYs and 6 of 11, 55% adults); clinical (0% HYs and 4 of 11, 36% adults), with less data available for Canada geese (only 1 of 9, 11% HYs marginally subclinical). The clinically lead-poisoned mallards had extremely high concentrations of lead in blood (2.69a??8.82 I?g/g) and liver (6.39a??17.89 I?g/g). Eight mallards found dead in the CDA River Basin during a concurrent study were diagnosed as lead poisoned, and only one (12.5%) contained ingested lead shot, which again strongly implicates other lead sources. The finding of dead lead poisoned Canada geese together with the high percentage of live mallards classified as subclinically or clinically lead poisoned, in combination with the low incidence of ingested lead shot causes us concern for both of these species, which live in association with lead-contaminated sediment in the CDA River Basin.

Henny, Charles J.; Blus, L.J.; Hoffman, D.J.; Sileo, L.; Audet, Daniel J.; Snyder, Mark R.

2000-01-01

247

Field evaluation of lead effects on Canada geese and mallards in the Coeur d'Alene River Basin, Idaho.  

PubMed

Hatch year (HY) mallards (Anas platyrhynchos) in the Coeur d'Alene (CDA) River Basin had higher concentrations of lead in their blood than HY Western Canada geese (Branta canadensis moffitti) (geometric means 0.98 versus 0.28 microg/g, wet weight). The pattern for adults of both species was similar, although geometric means (1.77 versus 0. 41 microg/g) were higher than in HY birds. HY mallards captured in the CDA River Basin in 1987 contained significantly lower lead concentrations in their blood than in 1994-95 (0.36 versus 0.98 microg/g); however, some very young mallards were sampled in 1987, and concentrations in adults were not significantly different in 1987, 1994, or 1995 (1.52, 2.07, 1.55 microg/g, respectively). Both species in the CDA River Basin in 1994-95 showed significantly reduced red blood cell delta-aminolevulinic acid dehydratase (ALAD) activity compared to the reference areas: Canada geese (HY -65.4 to -86.0%, adults -82.3%), and mallards (HY -90.7 to -95.5%, adults -94. 1%). Canada goose goslings were divided into size classes, and the two smaller classes from the CDA River Basin had significantly elevated free erythrocyte protoporphyrin (protoporphyrin) levels compared to the reference area (15.2x and 6.9x). HY and adult mallards both had significantly elevated protoporphyrin (5.9x and 7. 5x). Recognizing that interspecific differences exist in response and sensitivity to lead, it appears (at least for hemoglobin and hematocrit) that Canada geese were more sensitive to lead than mallards, i.e., adverse hematologic effects occur at lower blood lead concentrations. Only Canada geese from the CDA River Basin, in spite of lower blood lead concentrations, had significantly reduced mean hemoglobin and hematocrit values. No euthanized Canada geese (all HYs) from CDA River Basin were classified as clinically lead poisoned, but 38 Canada geese found dead in the CDA River Basin during a concurrent study succumbed to lead poisoning between 1992 and 1997. Only 6 (15.8%) of these 38 contained ingested lead shot, which contrasts greatly with the 75-94% incidence of ingested lead shot when mortality was due to lead shot ingestion. Lead from other contaminated sources (i.e., sediments and vegetation) in the CDA River Basin was strongly implicated in most Canada goose deaths. Based on the 31 live mallards and Canada geese collected in the CDA River Basin, which were representative of the live populations blood sampled only, the prevalence of subclinical and clinical lead poisoning (as determined by liver lead concentrations, excluding birds with ingested lead shot) was higher in mallards: subclinical (4 of 8, 50% HYs and 6 of 11, 55% adults); clinical (0% HYs and 4 of 11, 36% adults), with less data available for Canada geese (only 1 of 9, 11% HYs marginally subclinical). The clinically lead-poisoned mallards had extremely high concentrations of lead in blood (2.69-8. 82 microg/g) and liver (6.39-17.89 microg/g). Eight mallards found dead in the CDA River Basin during a concurrent study were diagnosed as lead poisoned, and only one (12.5%) contained ingested lead shot, which again strongly implicates other lead sources. The finding of dead lead poisoned Canada geese together with the high percentage of live mallards classified as subclinically or clinically lead poisoned, in combination with the low incidence of ingested lead shot causes us concern for both of these species, which live in association with lead-contaminated sediment in the CDA River Basin. PMID:10790508

Henny, C J; Blus, L J; Hoffman, D J; Sileo, L; Audet, D J; Snyder, M R

2000-07-01

248

Geographic patterns of introgressive hybridization between native Yellowstone cutthroat trout ( Oncorhynchus clarkii bouvieri) and introduced rainbow trout ( O. mykiss ) in the South Fork of the Snake River watershed, Idaho  

Microsoft Academic Search

Throughout its native range, the Yellowstone cutthroat trout (YCT), Oncorhynchus clarkii bouvieri, is declining dramatically in both abundance and distribution as a result of introgression with introduced rainbow trout\\u000a (RBT), O. mykiss. We sampled over 1,200 trout from the South Fork of the Snake River (SFSR) watershed, in southeastern Idaho and western Wyoming,\\u000a and measured the extent of introgression of

Kelly Gunnell; Michelle K. Tada; Felicia A. Hawthorne; Ernest R. Keeley; Margaret B. Ptacek

2008-01-01

249

Idaho Trails  

NSDL National Science Digital Library

Interested in exploring Idaho? This engaging site from the Idaho State Parks is perfect for explorers, hikers, and anyone with an interest in this beautiful state. Visitors can zoom in and out, investigate different Layers, such as regional and state boundaries, and even explore the map according to topography, National Geographic cultural and historical data, and street views. It's a great way to learn more about the state and visitors even have the ability to print out their own cartographic creations.

250

Age, Growth, and Movement of Mountain Whitefish, Prosopium williamsoni (Girard), in the North Fork Clearwater River, Idaho  

Microsoft Academic Search

The growth and age structure of mountain whitefish, Prosopium willlamsoni, was compared from three sample locations in the North Fork Clearwater River, and a tagging study initiated to assess movement and migratory behavior. No difference was detected in growth or age structure of whitefish in two streams of the upper drainage, and juveniles representing age groups I and II were

Stephen W. Pettit; Richard L. Wallace

1975-01-01

251

WATER QUALITY MONITORING NETWORK STATION TRANSECT STUDY, PALOUSE RIVER NEAR IDAHO-WASHINGTON BOUNDARY, JANUARY 21-22, 1979  

EPA Science Inventory

This field study was conducted to validate the location of sampling, in cross section and depth, for the Palouse River near Palouse, Washington (17060108); to determine association of total coliform counts with coliform from a fecal source; to collect data for future comparison w...

252

An energy budget for the Kootenai River, Idaho (USA), with application for management of the Kootenai white sturgeon, Acipenser transmontanus  

Microsoft Academic Search

An energy budget provides a useful tool for examining the exchange of energy between trophic levels. In this study we examined the potential for autotrophic productivity and organic material to support higher trophic levels in three distinct geomorphic segments of the Kootenai River, USA. This approach is particularly important given that several species of fish, including the endangered Kootenai white

Eric B. Snyder; G. Wayne Minshall

2005-01-01

253

Formation of linear and parabolic dunes on the eastern Snake River Plain, Idaho in the nineteenth century  

Microsoft Academic Search

Geomorphic and stratigraphic evidence show periods of distinct hydrologic excess and deficit sometime in the past 500 years on the eastern Snake River Plain. Natural exposures at the current shore of Mud Lake contain a lacustrine silty sand beneath eolian sands; the latter deposit is expressed at the surface as hairpin parabolic and linear dunes. These dunes can be traced

Steven L. Forman; James Pierson

2003-01-01

254

Subsidence of a volcanic basin by flexure and lower crustal flow: The eastern Snake River Plain, Idaho  

Microsoft Academic Search

The Eastern Snake River Plain (ESRP) is a linear volcanic basin interpreted by many workers to reflect late Cenozoic migration of North America over the Yellowstone hotspot. Thermal subsidence of this volcanic province with respect to Yellowstone has been documented by several workers, but no one has characterized subsidence with respect to the adjacent Basin and Range Province. This paper

Nadine McQuarrie I; David W. Rodgers

1998-01-01

255

Seismic expression and geological significane of a lacustrine delta in neogene deposits of the western Snake River Plain, Idaho  

Microsoft Academic Search

Lacustrine deposits in rift basin environments and groundwater resources in lacustrine sediments have become major petroleum targets and methods are needed to identify facies of permeable strata within thick sections of impermeable mud rocks characteristic of these deposits. High-resolution seismic reflection profiles and well data from the western Snake River plain basin are used to identify a buried lacustrine delta

Wood

1994-01-01

256

Cross-flows in observation boreholes induced by distant pumping of basalt aquifers: Eastern Snake River Plain, Idaho  

Microsoft Academic Search

Vertical flow velocities up to 20 ft\\/minute occur in borehole between stratified permeable zones of basalt aquifers of the eastern Snake River Plain. Water is transferred vertically in wells across relatively impermeable zones 35 to 65 ft thick between permeable zones 515 feet deep and a zone 550 to 575 ft deep. Large rates of cross flows are caused by

W. M. Bennecke; S. H. Wood; J. Olsen; W. Barrash

1993-01-01

257

Evidence for Right-lateral Shear Along the Northwest Margin of the Eastern Snake River Plain, Idaho  

Microsoft Academic Search

Previous investigators have proposed that extension within the eastern Snake River Plain (ESRP) is accommodated by intrusion of dikes at a rate similar to the rate of extension in the surrounding Basin and Range. This hypothesis is primarily based on the lack of strike-slip offset along the northwest physiographic boundary of the ESRP, the lack of seismicity within the ESRP

S. J. Payne; R. McCaffrey; R. W. King

2007-01-01

258

Biological and Physical Inventory of Clear Creek, Orofino Creek, and the Potlatch River, Tributary Streams of the Clearwater River, Idaho, 1984 Technical Report.  

SciTech Connect

Clear Creek, Orofino Creek, and Potlatch Creek, three of the largest tributaries of the lower Clearwater River Basin, were inventoried during 1984. The purpose of the inventory was to identify where anadromous salmonid production occurs and to recommend enhancement alternatives to increase anadromous salmonid habitat in these streams. Anadromous and fluvial salmonids were found in all three drainages. The lower reach of Clear Creek supported a low population of rainbow-steelhead, while the middle reach supported a much greater population of rainbow-steelhead. Substantial populations of cutthroat trout were also found in the headwaters of Clear Creek. Rainbow-steelhead and brook trout were found throughout Orofino Creek. A predominant population of brook trout was found in the headwaters while a predominant population of rainbow-steelhead was found in the mainstem and lower tributaries of Orofino Creek. Rainbow-steelhead and brook trout were also found in the Potlatch River. Generally, the greatest anadromous salmonid populations in the Potlatch River were found within the middle reach of this system. Several problems were identified which would limit anadromous salmonid production within each drainage. Problems affecting Clear Creek were extreme flows, high summer water temperature, lack of riparian habitat, and high sediment load. Gradient barriers prevented anadromous salmonid passage into Orofino Creek and they are the main deterrent to salmonid production in this system. Potlatch River has extreme flows, high summer water temperature, a lack of riparian habitat and high sediment loads. Providing passage over Orofino Falls is recommended and should be considered a priority for improving salmonid production in the lower Clearwater River Basin. Augmenting flows in the Potlatch River is also recommended as an enhancement measure for increasing salmonid production in the lower Clearwater River Basin. 18 refs., 5 figs., 85 tabs.

Johnson, David B.

1985-05-01

259

Probability of detecting atrazine/desethyl-atrazine and elevated concentrations of nitrate plus nitrate as nitrogen in ground water in the Idaho part of the western Snake River Plain  

USGS Publications Warehouse

As ground water continues to provide an ever-growing proportion of Idaho?s drinking water, concerns about the quality of that resource are increasing. Pesticides (most commonly, atrazine/desethyl-atrazine, hereafter referred to as atrazine) and nitrite plus nitrate as nitrogen (hereafter referred to as nitrate) have been detected in many aquifers in the State. To provide a sound hydrogeologic basis for atrazine and nitrate management in southern Idaho—the largest region of land and water use in the State—the U.S. Geological Survey produced maps showing the probability of detecting these contaminants in ground water in the upper Snake River Basin (published in a 1998 report) and the western Snake River Plain (published in this report). The atrazine probability map for the western Snake River Plain was constructed by overlaying ground-water quality data with hydrogeologic and anthropogenic data in a geographic information system (GIS). A data set was produced in which each well had corresponding information on land use, geology, precipitation, soil characteristics, regional depth to ground water, well depth, water level, and atrazine use. These data were analyzed by logistic regression using a statistical software package. Several preliminary multivariate models were developed and those that best predicted the detection of atrazine were selected. The multivariate models then were entered into a GIS and the probability maps were produced. Land use, precipitation, soil hydrologic group, and well depth were significantly correlated with atrazine detections in the western Snake River Plain. These variables also were important in the 1998 probability study of the upper Snake River Basin. The effectiveness of the probability models for atrazine might be improved if more detailed data were available for atrazine application. A preliminary atrazine probability map for the entire Snake River Plain in Idaho, based on a data set representing that region, also was produced. In areas where this map overlaps the 1998 map of the upper Snake River Basin, the two maps show broadly similar probabilities of detecting atrazine. Logistic regression also was used to develop a preliminary statistical model that predicts the probability of detecting elevated nitrate in the western Snake River Plain. A nitrate probability map was produced from this model. Results showed that elevated nitrate concentrations were correlated with land use, soil organic content, well depth, and water level. Detailed information on nitrate input, specifically fertilizer application, might have improved the effectiveness of this model.

Donato, Mary M.

2000-01-01

260

Estimation of total nitrogen and total phosphorus in streams of the Middle Columbia River Basin (Oregon, Washington, and Idaho) using SPARROW models, with emphasis on the Yakima River Basin, Washington  

USGS Publications Warehouse

The watershed model SPARROW (Spatially Related Regressions on Watershed attributes) was used to predict total nitrogen (TN) and total phosphorus (TP) loads and yields for the Middle Columbia River Basin in Idaho, Oregon, and Washington. The new models build on recently published models for the entire Pacific Northwest, and provide revised load predictions for the arid interior of the region by restricting the modeling domain and recalibrating the models. Results from the new TN and TP models are provided for the entire region, and discussed with special emphasis on the Yakima River Basin, Washington. In most catchments of the Yakima River Basin, the TN and TP in streams is from natural sources, specifically nitrogen fixation in forests (TN) and weathering and erosion of geologic materials (TP). The natural nutrient sources are overshadowed by anthropogenic sources of TN and TP in highly agricultural and urbanized catchments; downstream of the city of Yakima, most of the load in the Yakima River is derived from anthropogenic sources. Yields of TN and TP from catchments with nearly uniform land use were compared with other yield values and export coefficients published in the scientific literature, and generally were in agreement. The median yield of TN was greatest in catchments dominated by agricultural land and smallest in catchments dominated by grass and scrub land. The median yield of TP was greatest in catchments dominated by forest land, but the largest yields (90th percentile) of TP were from agricultural catchments. As with TN, the smallest TP yields were from catchments dominated by grass and scrub land.

Johnson, Henry M.; Black, Robert W.; Wise, Daniel R.

2013-01-01

261

Operation Plans for Anadromous Fish Production Facilities in the Columbia River Basin : Annual Report 1995, Volume I - Idaho.  

SciTech Connect

Clearwater Hatchery is located on the north bank of the North Fork of the Clearwater River, downstream from Dworshak Dam. It is approximately 72 miles from Lower Granite Dam, and 504 miles from the mouth of the Columbia River. Site elevation is approximately 994 feet above sea level. The hatchery is staffed with 8 FTE`s. Clearwater Hatchery has two pipelines from Dworshak Reservoir. One is attached to a floating platform and is capable of providing various temperatures at varying depths. The other is a stationary intake about 245 feet below the top of the dam. All water is gravity fed to the hatchery. An 18-inch intake pipe provides an estimated 10 cfs with temperature remaining constant at approximately 40T. The primary 42-inch intake pipe can draw water from 5 to 45 feet in depth with temperatures ranging from 55{degrees} to 60{degrees}F and 70 cfs of flow. This report describes the operations of the hatchery.

Idaho Department of Fish and Game; US Fish and Wildlife Service; Nez Perce Tribe

1996-06-01

262

Evaluation of LiDAR-Acquired Bathymetric and Topographic Data Accuracy in Various Hydrogeomorphic Settings in the Lower Boise River, Southwestern Idaho, 2007  

USGS Publications Warehouse

Elevation data in riverine environments can be used in various applications for which different levels of accuracy are required. The Experimental Advanced Airborne Research LiDAR (Light Detection and Ranging) - or EAARL - system was used to obtain topographic and bathymetric data along the lower Boise River, southwestern Idaho, for use in hydraulic and habitat modeling. The EAARL data were post-processed into bare earth and bathymetric raster and point datasets. Concurrently with the EAARL data collection, real-time kinetic global positioning system and total station ground-survey data were collected in three areas within the lower Boise River basin to assess the accuracy of the EAARL elevation data in different hydrogeomorphic settings. The accuracies of the EAARL-derived elevation data, determined in open, flat terrain, to provide an optimal vertical comparison surface, had root mean square errors ranging from 0.082 to 0.138 m. Accuracies for bank, floodplain, and in-stream bathymetric data had root mean square errors ranging from 0.090 to 0.583 m. The greater root mean square errors for the latter data are the result of high levels of turbidity in the downstream ground-survey area, dense tree canopy, and horizontal location discrepancies between the EAARL and ground-survey data in steeply sloping areas such as riverbanks. The EAARL point to ground-survey comparisons produced results similar to those for the EAARL raster to ground-survey comparisons, indicating that the interpolation of the EAARL points to rasters did not introduce significant additional error. The mean percent error for the wetted cross-sectional areas of the two upstream ground-survey areas was 1 percent. The mean percent error increases to -18 percent if the downstream ground-survey area is included, reflecting the influence of turbidity in that area.

Skinner, Kenneth D.

2009-01-01

263

Preliminary Multi-Isotopic Data and Potential Regional Connections for Late Cenozoic Basalts of the Western Snake River Plain, Idaho  

Microsoft Academic Search

Previous research regarding the origin and evolution of Snake River Plain (SRP) basalts west of the 116° meridian has utilized field mapping, petrographic and geochemical data, and some Sr-isotopic analyses. These studies showed that in the past 2 m.y. at least three suites of chemically and isotopically distinct basalts were produced. The oldest (1.0 Ma to 1.6 Ma) are iron-rich

T. A. Rivera; C. M. White; M. D. Schmitz

2007-01-01

264

Field Evaluation of Lead Effects on Canada Geese and Mallards in the Coeur d'Alene River Basin, Idaho  

Microsoft Academic Search

Hatch year (HY) mallards (Anas platyrhynchos) in the Coeur d'Alene (CDA) River Basin had higher concentrations of lead in their blood than HY Western Canada geese (Branta canadensis moffitti) (geometric means 0.98 versus 0.28 ?g\\/g, wet weight). The pattern for adults of both species was similar, although geometric\\u000a means (1.77 versus 0.41 ?g\\/g) were higher than in HY birds. HY

C. J. Henny; L. J. Blus; D. J. Hoffman; L. Sileo; D. J. Audet; M. R. Snyder

2000-01-01

265

Assessment of the sand and gravel resources of the Lower Boise River Valley area, Idaho: part one: geological framework of the sand and gravel deposits  

USGS Publications Warehouse

The USGS has undertaken a first order evaluation of sand & gravel resources in the Lower Boise River Valley in response to rapid urban expansion in the Boise-Nampa-Caldwell corridor in southwest Idaho. The study is intended to provide land-use planners and managers, particularly in the Bureau of Land Management, with a foundation of knowledge that will allow them to anticipate and plan for demand for and development of sand and gravel resources on public lands in response to the urban growth. Attributes under study include: regional geology of both alluvial source areas as well as deposits; fluvial processes that led to deposition of the sand and gravel deposits; spatial distribution of the deposits; quantity and quality of materials in the deposits; and the suitability of the deposits for a range of applications. The study will also examine and attempt to model the association between fluvial processes, deposit characteristics, and physical specifications for various applications of sand and gravel. The results will be presented in a series of sand and gravel assessment reports of which this is the first.

Bliss, James D.; Moyle, Phillip R.

2001-01-01

266

Origin and stratigraphy of phreatomagmatic deposits at the Pleistocene Sinker Butte Volcano, Western Snake River Plain, Idaho  

NASA Astrophysics Data System (ADS)

Sinker Butte is the erosional remnant of a very large basaltic tuff cone of middle Pleistocene age located at the southern edge of the western Snake River Plain. Phreatomagmatic tephras are exposed in complete sections up to 100 m thick in the walls of the Snake River Canyon, creating an unusual opportunity to study the deposits produced by this volcano through its entire sequence of explosive eruptions. The main objectives of the study were to determine the overall evolution of the Sinker Butte volcano while focusing particularly on the tephras produced by its phreatomagmatic eruptions. Toward this end, twenty-three detailed stratigraphic sections ranging from 20 to 100 m thick were examined and measured in canyon walls exposing tephras deposited around 180° of the circumference of the volcano. Three main rock units are recognized in canyon walls at Sinker Butte: a lower sequence composed of numerous thin basaltic lava flows, an intermediate sequence of phreatomagmatic tephras, and a capping sequence of welded basaltic spatter and more lava flows. We subdivide the phreatomagmatic deposits into two main parts, a series of reworked, mostly subaqueously deposited tephras and a more voluminous sequence of overlying subaerial surge and fall deposits. Most of the reworked deposits are gray in color and exhibit features such as channel scour and fill, planar-stratification, high and low angle cross-stratification, trough cross-stratification, and Bouma-turbidite sequences consistent with their being deposited in shallow standing water or in braided streams. The overlying subaerial deposits are commonly brown or orange in color due to palagonitization. They display a wide variety of bedding types and sedimentary structures consistent with deposition by base surges, wet to dry pyroclastic fall events, and water saturated debris flows. Proximal sections through the subaerial tephras exhibit large regressive cross-strata, planar bedding, and bomb sags suggesting deposition by wet base surges and tephra fallout. Medial and distal deposits consist of a thick sequence of well-bedded tephras; however, the cross-stratified base-surge deposits are thinner and interbedded within the fallout deposits. The average wavelength and amplitude of the cross strata continue to decrease with distance from the vent. These bedded surge and fall deposits grade upward into dominantly fall deposits containing 75-95% juvenile vesiculated clasts and localized layers of welded spatter, indicating a greatly reduced water-melt ratio. Overlying these "dryer" deposits are massive tuff breccias that were probably deposited as water saturated debris flows (lahars). The first appearance of rounded river gravels in these massive tuff breccias indicates downward coring of the diatreme and entrainment of country rock from lower in the stratigraphic section. The "wetter" nature of these deposits suggests a renewed source of external water. The massive deposits grade upward into wet fallout tephras and the phreatomagmatic sequence ends with a dry scoria fall deposit overlain by welded spatter and lava flows. Field observations and two new 40Ar- 39Ar incremental heating dates suggest the succession of lavas and tephra deposits exposed in this part of the Snake River canyon may all have been erupted from a closely related complex of vents at Sinker Butte. We propose that initial eruptions of lava flows built a small shield edifice that dammed or disrupted the flow of the ancestral Snake River. The shift from effusive to explosive eruptions occurred when the surface water or rising ground water gained access to the vent. As the river cut a new channel around the lava dam, water levels dropped and the volcano returned to an effusive style of eruption.

Brand, Brittany D.; White, Craig M.

2007-02-01

267

Geothermal resources of southern Idaho  

USGS Publications Warehouse

The geothermal resource of southern Idaho as assessed by the U.S. Geological Survey in 1978 is large. Most of the known hydrothermal systems in southern Idaho have calculated reservoir temperatures of less than 150?C. Water from many of these systems is valuable for direct heat applications, but is lower than the temperature of interest for commercial generation of electricity at the present time. Most of the known and inferred geothermal resources of southern Idaho underlie the Snake River Plain. However, major uncertainties exist concerning the geology and temperatures beneath the plain. By far the largest hydrothermal system in Idaho is in the Bruneau-Grand View area of the western Snake River Plain with a calculated reservoir temperature of 107?C and an energy of 4.5? 10 20 joules. No evidence of higher temperature water associated with this system has been found. Although the geology of the eastern Snake River Plain suggests that a large thermal anomaly may underlie this area of the plain, direct evidence of high temperatures has not been found. Large volumes of water at temperatures between 90? and 150?C probably exist along the margins of the Snake River Plain and in local areas north and south of the plain. Areas that appear particularly promising for the occurrence of large high-temperature hydrothermal systems are: the area north of the Snake River Plain and west of the Idaho batholith, the Island Park area, segments of the margins of the eastern Snake River Plain, and the Blackfoot lava field.

Mabey, Don R.

1983-01-01

268

Genetic interpretation of lead-isotopic data from the Columbia River basalt group, Oregon, Washington, and Idaho.  

USGS Publications Warehouse

Lead-isotopic data for the high-alumina olivine plateau basalts and most of the Colombia River basalt group plot within the Cascade Range mixing array. The data for several of the formations form small, tight clusters and the Nd and Sr isotopic data show discrete variation between these basalt groups. The observed isotopic and trace-element data from most of the Columbia River basalt group can be accounted for by a model which calls for partial melting of the convecting oceanic-type mantle and contamination by fluids derived from continental sediments which were subducted along the trench. These sediments were transported in the low-velocity zone at least 400 km behind the active arc into a back-arc environment represented by the Columbia Plateau province. With time, the zone of melting moved up, resulting in the formation of the Saddle Mt basalt by partial melting of a 2600 m.y.-old sub-continental lithosphere characterized by high Th/U, Th/Pb, Rb/Sr and Nd/Sm ratios and LREE enrichment. Partial melting of old sub-continental lithosphere beneath the continental crust may be an important process in the formation of continental tholeiite flood basalt sequences world-wide. -L.di H.

Church, S.E.

1985-01-01

269

Geothermal resources of southern Idaho  

SciTech Connect

The geothermal resource of southern Idaho as assessed by the U.S. Geological Survey in 1978 is large. Most of the known hydrothermal systems in southern Idaho have calculated reservoir temperatures of less than 150 C. Water from many of these systems is valuable for direct heat applications. A majority of the known and inferred geothermal resources of southern Idaho underlie the Snake River Plain. However, major uncertainties exist concerning the geology and temperatures beneath the plain. The largest hydrothermal system in Idaho is in the Bruneau-Grang View area of the western Snake River Plain with a calculated reservoir temperature of 107 C and an energy of 4.5 x 10 to the 20th power joules. No evidence of higher temperature water associated with this system was found. Although the geology of the eastern Snake River Plain suggests that a large thermal anomaly may underlie this area of the plain, direct evidence of high temperatures was not found. Large volumes of water at temperatures between 90 and 150 C probably exist along the margins of the Snake River Plain and in local areas north and south of the plain.

Mabey, D.R.

1983-01-01

270

Use of chlorine-36 to determine regional-scale aquifer dispersivity, eastern Snake River Plain aquifer, Idaho/USA  

USGS Publications Warehouse

Chlorine-36 (36Cl) derived from processed nuclear waste that was disposed at the US Department of Energy's Idaho National Engineering and Environmental Laboratory (INEEL) through a deep injection well in 1958, was detected 24-28 yr later in groundwater monitoring wells approximately 26 km downgradient from the source. Groundwater samples covering the period 1966-1995 were selected from the US Geological Survey's archived-sample library at the INEEL and analyzed for 36Cl by accelerator mass spectrometry (AMS). The smaller 36Cl peak concentrations in water from the far-field monitoring wells relative to the input suggest that aquifer dispersivity may be large. However, the sharpness of the 1958 disposal peak of 36Cl is matched by the measured 36Cl concentrations in water from these wells. This implies that a small aquifer dispersivity may be attributed to preferential groundwater flowpaths. Assuming that tracer arrival times at monitoring wells are controlled by preferential flow, a 1-D system-response model was used to estimate dispersivity by comparing the shape of predicted 36Cl-concentration curves to the shape of 36Cl-concentration curves measured in water from these observation wells. The comparisons suggest that a 1-D dispersivity of 5 m provides the best fit to the tracer data. Previous work using a 2-D equivalent porous-media model concluded that longitudinal dispersivity (equivalent to 1-D dispersivity in our model) was 90 m (Ackerman, 1991). A 90 m dispersivity value eliminates the 1958 disposal peak in our model output curves. The implications of the arrival of 36Cl at downgradient monitoring wells are important for three reasons: (1) the arrival times and associated 36Cl concentrations provide quantitative constraints on residence times, velocities, and dispersivities in the aquifer; (2) they help to refine our working hypotheses of groundwater flow in this aquifer and (3) they may suggest a means of estimating the distribution of preferential flowpaths in the aquifer. ?? 2000 Elsevier Science B.V. All rights reserved.

Cecil, L.D.; Welhan, J.A.; Green, J.R.; Grape, S.K.; Sudicky, E.R.

2000-01-01

271

Streamflow statistics for development of water rights claims for the Jarbidge Wild and Scenic River, Owyhee Canyonlands Wilderness, Idaho, 2013-14: a supplement to Scientific Investigations Report 2013-5212  

USGS Publications Warehouse

The U.S. Geological Survey (USGS), in cooperation with the Bureau of Land Management (BLM), estimated streamflow statistics for stream segments designated “Wild,” “Scenic,” or “Recreational” under the National Wild and Scenic Rivers System in the Owyhee Canyonlands Wilderness in southwestern Idaho. The streamflow statistics were used by the BLM to develop and file a draft, federal reserved water right claim to protect federally designated “outstanding remarkable values” in the Jarbidge River. The BLM determined that the daily mean streamflow equaled or exceeded 20, 50, and 80 percent of the time during bimonthly periods (two periods per month) and the bankfull (66.7-percent annual exceedance probability) streamflow are important thresholds for maintaining outstanding remarkable values. Although streamflow statistics for the Jarbidge River below Jarbidge, Nevada (USGS 13162225) were published previously in 2013 and used for the draft water right claim, the BLM and USGS have since recognized the need to refine streamflow statistics given the approximate 40 river mile distance and intervening tributaries between the original point of estimation (USGS 13162225) and at the mouth of the Jarbidge River, which is the downstream end of the Wild and Scenic River segment. A drainage-area-ratio method was used in 2013 to estimate bimonthly exceedance probability streamflow statistics at the mouth of the Jarbidge River based on available streamgage data on the Jarbidge and East Fork Jarbidge Rivers. The resulting bimonthly streamflow statistics were further adjusted using a scaling factor calculated from a water balance on streamflow statistics calculated for the Bruneau and East Fork Bruneau Rivers and Sheep Creek. The final, adjusted bimonthly exceedance probability and bankfull streamflow statistics compared well with available verification datasets (including discrete streamflow measurements made at the mouth of the Jarbidge River) and are considered the best available estimates for streamflow statistics in the Jarbidge Wild and Scenic River segment.

Wood, Molly S.

2014-01-01

272

Provenance study and environments of deposition of the Pennslyvanian-Permian Wood River Formation, south-central Idaho, and the paleotectonic character of the Wood River basin  

E-print Network

of the Oquirrh basin. The Antler highland as well as the craton to the east could have supplied sediment to this part of the basin. TO Mom and Dad vi ACKNOWLEDGEMENTS I would like to sincerely thank Dr. Thomas E. Yancey, my commit- tee chairman, for his... continual support and kindness throughout my graduate career. His geological advice and ideas on the Wood River Formation were always helpful, and they enabled me to solve many problems encountered during the course of writing my thesis. I would also...

Dean, Christopher William

2012-06-07

273

The Raft River Basin, Idaho-Utah as of 1966: A reappraisal of the water resources and effects of ground-water development  

USGS Publications Warehouse

The Raft River basin, mostly in south-central Idaho and partly in Utah, is a drainage basin of approximately 1,510 square miles. Much arable land in the basin lacks water for irrigation, and the potentially irrigable acreage far exceeds the amount that could be irrigated with the 140,000 acre-feet estimated annual water yield. Therefore, the amount of uncommitted water that could be intercepted and used within the basin is the limiting factor in further development of agriculture irrigated with water derived from within the basin; Water for additional irrigation might be obtained by pumping more ground water, but only if large additional ground-water storage depletion can be tolerated. Alternatively, supplemental water might be imported. The Raft River basin is an area of rugged mountain ranges, aggraded alluvial plains, and intermontane valleys. Topography and geologic structure strongly influence the climate and hydrology. The Raft River rises in the Goose Creek Range of northwestern Utah and flows generally northeastward and northward, joining the Snake River in the backwater of Lake Walcott. The climate ranges from cool subhumid in the mountains to semiarid on the floor of the Raft River valley. Precipitation ranges from less than l0 inches on the valley floor to more than 30 inches at some places in the mountains. Rainfall is light during the growing season of about 100 days, and irrigation is necessary for most cultivated crops. About 87,000 acres of land was irrigated in the 1960's, on the average, and most of that is in the lower Raft River valley. Nearly all usable surface water in the basin is diverted for irrigation and as of 1966 less than 20,000 acres were irrigated exclusively with surface water. Most stock, farm, and domestic water is from wells. Irrigation with ground water is Widely practiced and about 69,000 acres were irrigated partly or wholly with ground water in, 1966. In 1963 the valley was closed to further issuance of permits to appropriate ground-water because of declining water levels. Geologic structure, lithology, and physiographic history control the surface-drainage pattern as well as the occurrence and movement of ground water. The principal water-bearing formations are the Salt Lake Formation of Pliocene age, consisting mainly of weakly consolidated sandy sediments and some layers of volcanic rock; the Raft Formation of Pleistocene age consisting of sand and gravel, lake sediments, and thin beds of silt and clay; and alluvial deposits of Holocene age that form aquifers beneath the bottom lands of the valleys. Good yields from wells, ranging upward to several thousand gallons a minute, are obtained from the water-bearing formations. Basalt lavas of the Snake River Group yield water where they occur below the water table of the valley. A few wells that penetrate limestone obtain substantial supplies from crevices. Thickness of the composite aquifer ranges from 0 to more than 1,500 feet. Transmissivity of the composite aquifer is estimated to vary from about 10,000 gpd/ft (gallons per day per foot) along the basin margins to more than 450,000 gpd/ft. Permeability of the water-bearing deposits is highly variable, but is estimated to average about 300 gpd/ft2 for the basin as a whole. The ground-water storage capacity of the basin is large; in the lower Raft Rive subbasin alone, the upper 200 feet of saturated deposits contain an estimated 9,000,000 acre-feet of water. The average specific yield of the shallow deposits is estimated to be 20 percent. The water yield of the Raft River basin is estimated to average about 140,000 acre-feet per year as compared to 183,600 acre-feet estimated by Nace and others (1961) and 320,000 acre-feet estimated by Mundorff and Sisco (1963). Surface outflow of the Raft River to the Snake River now amounts to only about 1,900 acre-feet per year, a decline of about 15,000 acre-feet a year from the estimated original average outflow prior to ir

Walker, E. H.; Dutcher, L. C.; Decker, S. O.; Dyer, K. L.

1970-01-01

274

Mercury and selenium concentrations in biofilm, macroinvertebrates, and fish collected in the Yankee Fork of the Salmon River, Idaho, USA, and their potential effects on fish health.  

PubMed

The Yankee Fork is a large tributary of the Salmon River located in central Idaho, USA, with an extensive history of placer and dredge-mining activities. Concentrations of selenium (Se) and mercury (Hg) in various aquatic trophic levels were measured in the Yankee Fork during 2001 and 2002. Various measurements of fish health were also performed. Sites included four on the mainstem of the Yankee Fork and two off-channel sites in partially reclaimed dredge pools used as rearing habitat for cultured salmonid eggs and fry. Hg concentrations in whole mountain whitefish and shorthead sculpin ranged from 0.28 to 0.56 ?g/g dry weight (dw), concentrations that are generally less than those reported to have significant impacts on fish. Biofilm and invertebrates ranged from 0.05 to 0.43 ?g Hg/g dw. Se concentrations measured in biota samples from the Yankee Fork were greater than many representative samples collected in the Snake and Columbia watersheds and often exceeded literature-based toxic thresholds. Biofilm and invertebrates ranged from 0.58 to 4.66 ?g Se/g dw. Whole fish ranged from 3.92 to 7.10 ?g Se/g dw, and gonads ranged from 6.91 to 31.84 ?g Se/g dw. Whole-body Se concentrations exceeded reported toxicological thresholds at three of four sites and concentrations in liver samples were mostly greater than concentrations shown to have negative impacts on fish health. Histological examinations performed during this study noted liver abnormalities, especially in shorthead sculpin, a bottom-dwelling species. PMID:23080409

Rhea, Darren T; Farag, Aïda M; Harper, David D; McConnell, Elizabeth; Brumbaugh, William G

2013-01-01

275

Coolwater culmination: Sensitive high-resolution ion microprobe (SHRIMP) U-Pb and isotopic evidence for continental delamination in the Syringa Embayment, Salmon River suture, Idaho  

USGS Publications Warehouse

During dextral oblique translation along Laurentia in western Idaho, the Blue Mountains superterrane underwent clockwise rotation and impinged into the Syringa embayment at the northern end of the Salmon River suture. Along the suture, the superterrane is juxtaposed directly against western Laurentia, making this central Cordilleran accretionary-margin segment unusually attenuated. In the embayment, limited orthogonal contraction produced a crustal wedge of oceanic rocks that delaminated Laurentian crust. The wedge is exposed through Laurentian crust in the Coolwater culmination as documented by mapping and by sensitive high-resolution ion microprobe U-Pb, Sri, and ??Nd data for gneisses that lie inboard of the suture. The predominant country rock is Mesoproterozoic paragneiss overlying Laurentian basement. An overlying Neoproterozoic (or younger) paragneiss belt in the Syringa embayment establishes the form of the Cordilleran miogeocline and that the embayment is a relict of Rodinia rifting. An underlying Cretaceous paragneiss was derived from arc terranes and suture-zone orogenic welt but also from Laurentia. The Cretaceous paragneiss and an 86-Ma orthogneiss that intruded it formed the wedge of oceanic rocks that were inserted into the Laurentian margin between 98 and 73 Ma, splitting supracrustal Laurentian rocks from their basement. Crustal thickening, melting and intrusion within the wedge, and folding to form the Coolwater culmination continued until 61 Ma. The embayment formed a restraining bend at the end of the dextral transpressional suture. Clockwise rotation of the impinging superterrane and overthrusting of Laurentia that produced the crustal wedge in the Coolwater culmination are predicted by oblique collision into the Syringa embayment. Copyright 2008 by the American Geophysical Union.

Lund, K.; Aleinikoff, J.N.; Yacob, E.Y.; Unruh, D.M.; Fanning, C.M.

2008-01-01

276

Determination of Background Uranium Concentration in the Snake River Plain Aquifer under the Idaho National Engineering and Environmental Laboratory's Radioactive Waste Management Complex  

SciTech Connect

Uranium occurs naturally in the environment and is also a contaminant that is disposed of at the Radioactive Waste Management Complex (RWMC) at the Idaho National Engineering and Environmental Laboratory. To determine whether uranium concentrations in the Snake River Plain Aquifer, which underlies the laboratory, are elevated as a result of migration of anthropogenic uranium from the Subsurface Disposal Area in the RWMC, uranium background concentrations are necessary. Guideline values are calculated for total uranium, 234U, 235U, and 238U from analytical results from up to five datasets. Three of the datasets include results of samples analyzed using isotope dilution thermal ionization mass spectrometry (ID-TIMS) and two of the datasets include results obtained using alpha spectrometry. All samples included in the statistical testing were collected from aquifer monitoring wells located within 10 miles of the RWMC. Results from ID-TIMS and alpha spectrometry are combined when the data are not statistically different. Guideline values for total uranium were calculated using four of the datasets, while guideline values for 234U were calculated using only the alpha spectrometry results (2 datasets). Data from all five datasets were used to calculate 238U guideline values. No limit is calculated for 235U because the ID-TIMS results are not useful for comparison with routine monitoring data, and the alpha spectrometry results are too close to the detection limit to be deemed accurate or reliable for calculating a 235U guideline value. All guideline values presented represent the upper 95% coverage 95% confidence tolerance limits for background concentration. If a future monitoring result is above this guideline, then the exceedance will be noted in the quarterly monitoring report and assessed with respect to other aquifer information. The guidelines (tolerance limits) for total U, 234U, and 238U are 2.75 pCi/L, 1.92 pCi/L, and 0.90 pCi/L, respectively.

Molly K. Leecaster; L. Don Koeppen; Gail L. Olson

2003-06-01

277

The timing of tertiary metamorphism and deformation in the Albion-Raft River-Grouse Creek metamorphic core complex, Utah and Idaho  

USGS Publications Warehouse

The Albion-Raft River-Grouse Creek metamorphic core complex of southern Idaho and northern Utah exposes 2.56-Ga orthogneisses and Neoproterozoic metasedimentary rocks that were intruded by 32-25-Ma granitic plutons. Pluton emplacement was contemporaneous with peak metamorphism, ductile thinning of the country rocks, and top-to-thewest, normal-sense shear along the Middle Mountain shear zone. Monazite and zircon from an attenuated stratigraphic section in the Middle Mountain were dated with U-Pb, using a SHRIMP-RG (reverse geometry) ion microprobe. Zircons from the deformed Archean gneiss preserve a crystallization age of 2532 ?? 33 Ma, while monazites range from 32.6 ?? 0.6 to 27.1 ?? 0.6 Ma. In the schist of the Upper Narrows, detrital zircons lack metamorphic overgrowths, and monazites produced discordant U-Pb ages that range from 52.8 ?? 0.6 to 37.5 ?? 0.3 Ma. From the structurally and stratigraphically highest unit sampled, the schist of Stevens Spring, narrow metamorphic rims on detrital zircons yield ages from 140-110 Ma, and monazite grains contained cores that yield an age of 141 ??2 Ma, whereas rims and some whole grains ranged from 35.5 ?? 0.5 to 30.0 ?? 0.4 Ma. A boudinaged pegmatite exposed in Basin Creek is deformed by the Middle Mountains shear zone and yields a monazite age of 27.6 ?? 0.2 Ma. We interpret these data to indicate two periods of monazite and metamorphic zircon growth: a poorly preserved Early Cretaceous period (???140 Ma) that is strongly overprinted by Oligocene metamorphism (???32-27 Ma) related to regional plutonism and extension. ?? 2011 by The University of Chicago.

Strickland, A.; Miller, E. L.; Wooden, J. L.

2011-01-01

278

Straddle-packer determination of the vertical distribution of hydraulic properties in the Snake River Plain Aquifer at well USGS-44, Idaho Chemical Processing Plant, INEL  

SciTech Connect

Many of the monitor wells that penetrate the upper portion of the Snake River Plain aquifer at the Idaho National Engineering Laboratory (INEL) are open over large intervals that include multiple water-bearing zones. Most of these wells are equipped with dedicated submersible pumps. Water of varying quality from different water-bearing zones is mixed within the wells. The hydrologic properties of individual water bearing zones are difficult to determine. Water quality and water-level data on organic, heavy metal, and radioactive contaminants have been collected, reported, and interpreted from these monitor wells for more than forty years. The problems associated with well completions over large intervals through multiple water-bearing zones raise significant questions about the data. A straddle-packer system was developed and applied at the INEL site to investigate the monitor well network. The straddle-packer system, hydraulic testing methods, data analysis procedures, and testing results are described in this report. The straddle-packer system and the straddle-packer testing and data evaluation procedures can be improved for future testing at the INEL site. Recommended improvements to the straddle-packer system are: (1) improved transducer pressure sensing systems, (2) faster opening riser valve, and (3) an in-line flowmeter in the riser pipe. Testing and data evaluation recommended improvements are: (1) simultaneous valve opening during slug tests, (2) analysis of the ratio of the times for head change and recovery to occur, (3) constant-drawdown tests of high transmissivity intervals, (4) multiple-well aquifer tests, and (5) long term head monitoring.

Monks, J.I.

1994-09-23

279

Occurrence and flux of selected pesticides in surface water of the upper snake River Basin, Idaho and western Wyoming  

USGS Publications Warehouse

During May and June 1994, 37 water samples were collected at 31 sites in the upper Snake River Basin and analyzed for 83 pesticides and pesticide metabolites. EPTC, atrazine, and the atrazine metabolite deethylated atrazine were the most frequently detected and were found in 30, 20, and 13 of the samples, respectively. Fifteen additional pesticides were detected at least once. All the compounds detected were at concentrations of less than 1 microgram per liter. Total annual applications of EPTC and atrazine within subbasins and their instantaneous instream fluxes have a logarithmic relation with coefficients of determination (R2 values) of 0.55 and 0.62, respectively. At the time of sampling, the median daily flux of EPTC was about O. 0001% of the annual amount applied in a subbasin, whereas the median daily flux of atrazine was between 0.001 and 0.01%. The difference in fluxes between EPTC and atrazine probably results from differences in their physical properties and in the method and timing of application.

Clark, G.M.

1997-01-01

280

Characterization of Elastic Properties in Basalts of the Western Snake River Plain, Idaho: a Mechanostratigraphic Analysis of a Potential Geothermal Reservoir  

NASA Astrophysics Data System (ADS)

The western Snake River Plain is a region of high crustal heat flow and has the potential for commercial geothermal energy development. High-temperature crystalline reservoirs commonly have connected fracture networks and other discontinuities that provide the primary fluid storage and permeability (Type I fractures). A borehole was drilled during the DOE/ICDP Snake River Scientific Drilling Program near Mountain Home, Idaho to a depth of ~1,800 m (6,000 ft) with 85 - 90% slimhole core recovery to assess the potential for geothermal energy development. A high-temperature artesian flow zone was encountered in basalt at a depth of 1,745 m (5,726 ft) in the MH-2 borehole with fluid temperatures above 140°C (240°F). Analysis of geomechanical behavior of rocks requires an understanding of basic physical and elastic properties under dynamic in-situ stress conditions. Here we conduct unconfined uniaxial compressive stress experiments on core samples to measure static elastic properties and compressive strength over a ~305 m (1,000 ft) interval of the borehole above and including the geothermal reservoir. Acoustic velocities are measured under pressure and temperature scenarios to calculate dynamic elastic properties and describe the anisotropy of elastic moduli and compressive strength. Dynamic elastic properties are calculated from dipole sonic borehole log data and compare the results to the previous dynamic and static interpretations. The comparison demonstrates that the calculation of dynamic elastic properties from borehole data is an effective method to interpret and describe mechanical stratigraphy and elastic properties in the case that core is not available for analysis in this area. Natural fractures, induced fractures, and breakouts are mapped in acoustic televiewer data. Fracture density is calculated and compared to lithological and mechanical stratigraphy, defined by the physical properties, elastic properties, and strength measurements. The stratigraphic relationships indicate that a ~15 m (50 ft) section of weak, non-brittle, low-permeability, highly altered basalt may act as a caprock to the geothermal reservoir at depth. Lithological descriptions of core show that the basalt in MH-2 has been altered and reworked in many cases. The alternating zones of ductile rocks and brittle basalts affect fracture density and can control fracture permeability. The induced fracture and breakout data are used to identify the direction of each of the two horizontal principal stresses. Interpretation of breakout data and induced fracture data indicate that the maximum horizontal principal stress (Shmax) is oriented 50° + 15°. This direction is antithetical to the expected Shmax direction based on the orientation of the normal fault-bounded basin that is oriented approximately 320°.

Kessler, J. A.; Evans, J. P.; Schmitt, D. R.; Shervais, J. W.

2013-12-01

281

Rhyolites in the Kimberly Drill Core, Project Hotspot: First Intracaldera Ignimbrite from the Central Snake River Plain, Idaho?  

NASA Astrophysics Data System (ADS)

The rhyolites on the track of the Yellowstone hotspot are the classic examples of continental hotspot volcanism and the study of surface outcrops is maturing rapidly. However, in the central part of the track, where silicic volcanism is most voluminous, compositionally distinctive, and isotopically most anomalous, study of these large magma systems has been hindered because eruptive sources are buried. The 2 km Kimberly core helps fill that gap; it penetrates through surficial basalt, deep into the rhyolitic underpinnings on the southern margin of the province. The Kimberly core is dominated by thick sections of rhyolite lava and welded ignimbrite, with basalt-sediment intercalations between 241 m and 424 m depth. We tentatively interpret the core to include a thick intracaldera tuff. Our preliminary studies suggest that there are three major rhyolite units in the core. Rhyolite 3, the uppermost unit, is a nearly 130 m thick, low-silica rhyolite lava. Rhyolite 2 is the most highly evolved with ~75% silica and distinctively resorbed quartz. Rhyolite 1 is at least 1,340 m thick (the base was not cut by the core), has no apparent flow contacts or cooling breaks, and may represent a single, thick intracaldera ignimbrite. Paleomagnetic inclinations form a curious V-shaped profile, shallowing by about 18? between 700 and 1700 m depth. We interpret this to be the result of slower cooling of the mid-part of the thick intracaldera ignimbrite. The lower unit is a low-silica rhyolite with high concentrations of Fe2O3 and TiO2--among the highest of any known ignimbrite on the SRP. It is chemically distinct from the upper units, very homogeneous, not vertically zoned, and lacks multiple populations of phenocrysts. It somewhat resembles the regionally extensive ~10 Ma outflow tuff of Wooden Shoe Butte. However, this is one of several large, petrologically similar ignimbrites as young as 8.6 Ma exposed in the Cassia Mountains south of the hole, so further work is needed. Like most rhyolites from the Snake River Plain, all 3 units have the characteristics of A-type rhyolites with high concentrations of alkalies, high Fe/Mg and TiO2/MgO ratios, as well as high concentrations Nb, Y, Zr and Ga. Initial analyses of plag, cpx, and qtz show that all three units are low ?18O rhyolites, like most from the Central Snake River Plain-- ?18O in feldspar ranges from 1‰ in Rhyolite 1 to 3‰ in Rhyolites 2 and 3. In the thick lower ignimbrite, whole-rock ?18O increases systematically from the base upward (0.5‰ to as much as 9‰ in the altered top and ?D ranges from -140 to -180‰). Whole rock variations correlate with water content, apparently controlled by secondary clay. We suggest that these characteristics were largely imposed by their derivation from partial melting of basaltic sills and surrounding older crust. The low ?18O values reflect recycling of hydrothermally altered crustal rocks and indicate progressive incorporation of more hydrothermally altered material into the younger magmas. More work is needed to establish correlation with regional units, understand the emplacement of the rhyolites and their volcanic setting, and ascertain the origin of these distinctive low ?18O, A-type rhyolites.

Christiansen, E. H.; McCurry, M. O.; Champion, D. E.; Bolte, T.; Holtz, F.; Knott, T.; Branney, M. J.; Shervais, J. W.

2013-12-01

282

The role of episodic fire-related debris flows on long-term (103-104) sediment yields in the Middle Fork Salmon River Watershed, in central Idaho  

NASA Astrophysics Data System (ADS)

Episodic fire-related debris flows contribute large amounts of sediment and large woody debris to streams. This study evaluates fire-related sedimentation from small steep tributaries of the Middle Fork Salmon River (MFSR) in central Idaho to evaluate the timing, frequency, and magnitude of episodic fire-related sedimentation on long-term (10 3-10 4) sediment yields. The MFSR lies within the Northern Rocky Mountains and encompasses a range of ecosystems including high elevation (~3,000 -1,700 m) subalpine pine and spruce forests, mid-elevation (2650 - 1130 m) montane Douglas-fir and ponderosa pine-dominated forests and low elevation (~ 1,800 - 900 m) sagebrush steppe. Recent debris flow events in tributaries of the MFSR appear to primarily result from increased surface runoff, rilling, and progressive sediment bulking following high severity fires. This study estimates: 1) the volume of sediment delivered by four recent (1997-2008) fire-related debris flow events using real time kinematic GPS surveys, and 2) the timing of Holocene fire-related debris flow events determined by 14C dating charcoal fragments preserved in buried burned soils and within fire-related deposits. Our measured volumes of the four recent debris flow events are compared to two empirically derived volume estimates based on remotely sensed spatial data (burn severity and slope), measured geometric data (longitudinal profile, cross sectional area, flow banking angle), and precipitation records. Preliminary stratigraphic profiles in incised alluvial fans suggest that a large percentage of alluvial fan thickness is composed of fire-related deposits suggesting fire-related hillslope erosion is a major process delivering sediment to alluvial fans and to the MFSR. Fire-related deposits from upper basins compose ~71% of total alluvial fan thickness, while fire-related deposits from lower basins make up 36% of alluvial fan thickness. However, lower basins are less densely vegetated with small diameter woody material, which reduces size and preservation of charcoal fragments in lower elevation deposits. We hypothesize that fires burn during dry and/or variable climate conditions; therefore aggradation on alluvial fans, incision and abandonment of fan surfaces, and sediment yields are increased during dry and/or variable climate conditions. Preliminary results indicate that periods of fire and accelerated sedimentation vary with ecosystem type. Lower basins burned ~6500, ~900, and ~400 cal yr BP, while fire in upper basins occurred ~8200, 5400, 3800, 1300, and 500 cal yr BP. These preliminary results suggest different ecosystems respond to different climate drivers. Regional estimates of long-term (6,300 yr) sediment yields derived from cosmogenic nuclides (Kirchner et al., 2001) compared with episodic fire-related sedimentation (Meyer and Pierce 2003) indicate episodic events are orders of magnitude higher than long-term average rates, suggesting that large fire-related debris flows occur on average once every ~400 yr. Determining the timing, frequency, and magnitude of fire-related sedimentation events over the past ~ 8 ka help us assess the impact of episodic fire-related events on long-term (Holocene) average sediment yields in central Idaho.

Riley, K. E.; Pierce, J. L.; Hopkins, A.

2010-12-01

283

Evaluation of LiDAR-acquired bathymetric and topographic data accuracy in various hydrogeomorphic settings in the Deadwood and South Fork Boise Rivers, West-Central Idaho, 2007  

USGS Publications Warehouse

High-quality elevation data in riverine environments are important for fisheries management applications and the accuracy of such data needs to be determined for its proper application. The Experimental Advanced Airborne Research LiDAR (Light Detection and Ranging)-or EAARL-system was used to obtain topographic and bathymetric data along the Deadwood and South Fork Boise Rivers in west-central Idaho. The EAARL data were post-processed into bare earth and bathymetric raster and point datasets. Concurrently with the EAARL surveys, real-time kinematic global positioning system surveys were made in three areas along each of the rivers to assess the accuracy of the EAARL elevation data in different hydrogeomorphic settings. The accuracies of the EAARL-derived raster elevation values, determined in open, flat terrain, to provide an optimal vertical comparison surface, had root mean square errors ranging from 0.134 to 0.347 m. Accuracies in the elevation values for the stream hydrogeomorphic settings had root mean square errors ranging from 0.251 to 0.782 m. The greater root mean square errors for the latter data are the result of complex hydrogeomorphic environments within the streams, such as submerged aquatic macrophytes and air bubble entrainment; and those along the banks, such as boulders, woody debris, and steep slopes. These complex environments reduce the accuracy of EAARL bathymetric and topographic measurements. Steep banks emphasize the horizontal location discrepancies between the EAARL and ground-survey data and may not be good representations of vertical accuracy. The EAARL point to ground-survey comparisons produced results with slightly higher but similar root mean square errors than those for the EAARL raster to ground-survey comparisons, emphasizing the minimized horizontal offset by using interpolated values from the raster dataset at the exact location of the ground-survey point as opposed to an actual EAARL point within a 1-meter distance. The average error for the wetted stream channel surface areas was -0.5 percent, while the average error for the wetted stream channel volume was -8.3 percent. The volume of the wetted river channel was underestimated by an average of 31 percent in half of the survey areas, and overestimated by an average of 14 percent in the remainder of the survey areas. The EAARL system is an efficient way to obtain topographic and bathymetric data in large areas of remote terrain. The elevation accuracy of the EAARL system varies throughout the area depending upon the hydrogeomorphic setting, preventing the use of a single accuracy value to describe the EAARL system. The elevation accuracy variations should be kept in mind when using the data, such as for hydraulic modeling or aquatic habitat assessments.

Skinner, Kenneth D.

2011-01-01

284

Movement, swimming speed, and oxygen consumption of juvenile white sturgeon in response to changing flows, water temperatures, and light level in the Snake River, Idaho  

SciTech Connect

The flow of the Snake River downstream of Hells Canyon Dam, Idaho, frequently fluctuates as the dam responds to power production requirements. These flow fluctuations have the potential to increase the energy used by individual juvenile white sturgeon (Acipenser transmontanus) that move to avoid unfavorable habitat or that alter their swimming speeds to maintain position over a range of velocities. Following swimming respirometry experiments, a field study using electromyogram (EMG) and sonic telemetry evaluated whether sturgeon were being negatively affected by operations of Hells Canyon Dam during three study periods where flows were artificially fluctuated (247 to 856 m3/s), held high and stable (438 to 600 m3/s), or held low and stable (275 to 284 m3/s). Respirometry results confirmed that oxygen consumption of juvenile sturgeon increased with swim speed and was temperature dependent, and when corrected for fish mass, ranged from 140.2 to 306.5 mg O2 kg-1 h-1. The telemetry study showed that movements and activity levels, as measured by swimming speeds and oxygen consumption, of sturgeon were variable among fish and across study periods. When flows were held low and stable, sturgeon movement increased while activity levels decreased when compared to the study periods when flows were variable or were high and stable. Although the overall trend was for activity levels to be less during the study period when flows were low and stable, the majority of differences between study periods appeared to be due to differences in water temperature and light levels that changed during the three-month investigation. The results suggest high flows, even those of relatively short durations such as what occurs during load-following operations, restrict the movement of juvenile sturgeon, but do not result in an increase of energy expenditure, possibly because of morphological and behavioral adaptations to living in a high-velocity environment. This may have significant implications to sturgeon survival by altering foraging behavior or inter and intra-specific competition.

Geist, David R.; Brown, Richard S.; Cullinan, Valerie I.; Brink, Steve R.; Lepla, Kenneth B.; Bates, Phil; Chandler, James A.

2005-07-01

285

Annual trace-metal load estimates and flow-weighted concentrations of cadmium, lead, and zinc in the Spokane River basin, Idaho and Washington, 1999-2004  

USGS Publications Warehouse

Streamflow and trace-metal concentration data collected at 10 locations in the Spokane River basin of northern Idaho and eastern Washington during 1999-2004 were used as input for the U.S. Geological Survey software, LOADEST, to estimate annual loads and mean flow-weighted concentrations of total and dissolved cadmium, lead, and zinc. Cadmium composed less than 1 percent of the total metal load at all stations; lead constituted from 6 to 42 percent of the total load at stations upstream from Coeur d'Alene Lake and from 2 to 4 percent at stations downstream of the lake. Zinc composed more than 90 percent of the total metal load at 6 of the 10 stations examined in this study. Trace-metal loads were lowest at the station on Pine Creek below Amy Gulch, where the mean annual total cadmium load for 1999-2004 was 39 kilograms per year (kg/yr), the mean estimated total lead load was about 1,700 kg/yr, and the mean annual total zinc load was 14,000 kg/yr. The trace-metal loads at stations on North Fork Coeur d'Alene River at Enaville, Ninemile Creek, and Canyon Creek also were relatively low. Trace-metal loads were highest at the station at Coeur d'Alene River near Harrison. The mean annual total cadmium load was 3,400 kg/yr, the mean total lead load was 240,000 kg/yr, and the mean total zinc load was 510,000 kg/yr for 1999-2004. Trace-metal loads at the station at South Fork Coeur d'Alene River near Pinehurst and the three stations on the Spokane River downstream of Coeur d'Alene Lake also were relatively high. Differences in metal loads, particularly lead, between stations upstream and downstream of Coeur d'Alene Lake likely are due to trapping and retention of metals in lakebed sediments. LOADEST software was used to estimate loads for water years 1999-2001 for many of the same sites discussed in this report. Overall, results from this study and those from a previous study are in good agreement. Observed differences between the two studies are attributable to streamflow differences in the two regression models, 1999-2001 and 1999-2004. Flow-weighted concentrations (FWCs) calculated from the estimated loads for 1999-2004 were examined to aid interpretation of metal load estimates, which were influenced by large spatial and temporal variations in streamflow. FWCs of total cadmium ranged from 0.04 micrograms per liter (?g/L) at Enaville to 14 ?g/L at Ninemile Creek. Total lead FWCs were lowest at Long Lake (1.3 ?g/L) and highest at Ninemile Creek (120 ?g/L). Elevated total lead FWCs at Harrison confirmed that the high total lead loads at this station were not simply due to higher streamflow. Conversely, relatively low total lead loads combined with high total lead FWCs at Ninemile and Canyon Creeks reflected low streamflow but high concentrations of total lead. Very low total lead FWCs (1.3 to 2.7 ?g/L) at the stations downstream of Coeur d'Alene Lake are a result both of deposition of lead-laden sediments in the lake and dilution by additional streamflow. Total zinc FWCs also demonstrated the effect of streamflow on load calculations, and highlighted source areas for zinc in the basin. Total zinc FWCs at Canyon and Ninemile Creeks, 1,600 ?g/L and 2,200 ?g/L, respectively, were by far the highest in the basin but contributed among the lowest total zinc loads due to their relatively low streamflow. Total zinc FWCs ranged from 38 to 67 ?g/L at stations downstream of Coeur d'Alene Lake, but total zinc load estimates at these stations were relatively high because of high mean streamflow compared to other stations in the basin. Long-term regression models for 1991 to 2003 or 2004 were developed and annual trace-metal loads and FWCs were estimated for Pinehurst, Enaville, Harrison, and Post Falls to better understand the variability of metal loading with time. Long-term load estimates are similar to the results for 1999-2004 in terms of spatial distribution of metal loads throughout the basin. LOADEST results for 1991-2004 indicated that statistically significant downward temporal trends for dissolved and total cadmium, dissolved zinc,

Donato, Mary M.

2006-01-01

286

Survey of Columbia River Basin streams for Columbia pebblesnail Fluminicola columbiana and shortface lanx Fisherola nuttalli  

Microsoft Academic Search

At present, there are only two remaining sizable populations of Columbia pebblesnails Fluminicola columbiana; those in the Methow and Okanogan rivers, Washington. Smaller populations survive in the Hanford Reach of the Columbia River, Washington, and the lower Salmon River, Idaho, and possibly in the middle Snake River, Idaho; Hells Canyon of the Snake River, Idaho, Washington, and Oregon, and the

D. A. Neitzel; T. J. Frest

1992-01-01

287

Cultural Geography of Early Chinese Americans in Idaho and Montana, 1865-1900  

E-print Network

of their common border. Other important chains in northern and central Idaho include the Salmon River, Clearwater, Lemhi, Seven Devils, Sawtooth, and Lost River ranges. Western Montana ranges include the Big Belt, Lewis and Clark, and Absaroka. Map 2.... Physical Features of Idaho and Montana. Beyond then the Rocky Mountains, the Snake River Plain is the only other major physical province of Idaho. This region became a center for irrigation in the twentieth century and is the location of the state...

Chang, Woojin

2010-04-26

288

Variation of the fractal dimension anisotropy of two major Cenozoic normal fault systems over space and time around the Snake River Plain, Idaho and SW Montana  

NASA Astrophysics Data System (ADS)

The interaction of the thermally induced stress field of the Yellowstone hotspot (YHS) with existing Basin and Range (BR) fault blocks, over the past 17 m.y., has produced a new, spatially and temporally variable system of normal faults around the Snake River Plain (SRP) in Idaho and Wyoming-Montana area. Data about the trace of these new cross faults (CF) and older BR normal faults were acquired from a combination of satellite imageries, DEM, and USGS geological maps and databases at scales of 1:24,000, 1:100,000, 1:250,000, 1:1000, 000, and 1:2,500, 000, and classified based on their azimuth in ArcGIS 10. The box-counting fractal dimension (Db) of the BR fault traces, determined applying the Benoit software, and the anisotropy intensity (ellipticity) of the fractal dimensions, measured with the modified Cantor dust method applying the AMOCADO software, were measured in two large spatial domains (I and II). The Db and anisotropy of the cross faults were studied in five temporal domains (T1-T5) classified based on the geologic age of successive eruptive centers (12 Ma to recent) of the YHS along the eastern SRP. The fractal anisotropy of the CF system in each temporal domain was also spatially determined in the southern part (domain S1), central part (domain S2), and northern part (domain S3) of the SRP. Line (fault trace) density maps for the BR and CF polylines reveal a higher linear density (trace length per unit area) for the BR traces in the spatial domain I, and a higher linear density of the CF traces around the present Yellowstone National Park (S1T5) where most of the seismically active faults are located. Our spatio-temporal analysis reveals that the fractal dimension of the BR system in domain I (Db=1.423) is greater than that in domain II (Db=1.307). It also shows that the anisotropy of the fractal dimension in domain I is less eccentric (axial ratio: 1.242) than that in domain II (1.355), probably reflecting the greater variation in the trend of the BR system in domain I. The CF system in the S1T5 domain has the highest fractal dimension (Db=1.37) and the lowest anisotropy eccentricity (1.23) among the five temporal domains. These values positively correlate with the observed maxima on the fault trace density maps. The major axis of the anisotropy ellipses is consistently perpendicular to the average trend of the normal fault system in each domain, and therefore approximates the orientation of extension for normal faulting in each domain. This fact gives a NE-SW and NW-SE extension direction for the BR system in domains I and II, respectively. The observed NE-SW orientation of the major axes of the anisotropy ellipses in the youngest T4 and T5 temporal domains, oriented perpendicular to the mean trend of the normal faults in the these domains, suggests extension along the NE-SW direction for cross faulting in these areas. The spatial trajectories (form lines) of the minor axes of the anisotropy ellipses, and the mean trend of fault traces in the T4 and T5 temporal domains, define a large parabolic pattern about the axis of the eastern SRP, with its apex at the Yellowstone plateau.

Davarpanah, A.; Babaie, H. A.

2012-12-01

289

A conceptual model of ground-water flow in the eastern Snake River Plain aquifer at the Idaho National Laboratory and vicinity with implications for contaminant transport  

USGS Publications Warehouse

Ground-water flow in the west-central part of the eastern Snake River Plain aquifer is described in a conceptual model that will be used in numerical simulations to evaluate contaminant transport at the Idaho National Laboratory (INL) and vicinity. The model encompasses an area of 1,940 square miles (mi2) and includes most of the 890 mi2 of the INL. A 50-year history of waste disposal associated with research activities at the INL has resulted in measurable concentrations of waste contaminants in the aquifer. A thorough understanding of the fate and movement of these contaminants in the subsurface is needed by the U.S. Department of Energy to minimize the effect that contaminated ground water may have on the region and to plan effectively for remediation. Three hydrogeologic units were used to represent the complex stratigraphy of the aquifer in the model area. Collectively, these hydrogeologic units include at least 65 basalt-flow groups, 5 andesite-flow groups, and 61 sedimentary interbeds. Three rhyolite domes in the model area extend deep enough to penetrate the aquifer. The rhyolite domes are represented in the conceptual model as low permeability, vertical pluglike masses, and are not included as part of the three primary hydrogeologic units. Broad differences in lithology and large variations in hydraulic properties allowed the heterogeneous, anisotropic basalt-flow groups, andesite-flow groups, and sedimentary interbeds to be grouped into three hydrogeologic units that are conceptually homogeneous and anisotropic. Younger rocks, primarily thin, densely fractured basalt, compose hydrogeologic unit 1; younger rocks, primarily of massive, less densely fractured basalt, compose hydrogeologic unit 2; and intermediate-age rocks, primarily of slightly-to-moderately altered, fractured basalt, compose hydrogeologic unit 3. Differences in hydraulic properties among adjacent hydrogeologic units result in much of the large-scale heterogeneity and anisotropy of the aquifer in the model area, and differences in horizontal and vertical hydraulic conductivity in individual hydrogeologic units result in much of the small-scale heterogeneity and anisotropy of the aquifer in the model area. The inferred three-dimensional geometry of the aquifer in the model area is very irregular. Its thickness generally increases from north to south and from west to east and is greatest south of the INL. The interpreted distribution of older rocks that underlie the aquifer indicates large changes in saturated thickness across the model area. The boundaries of the model include physical and artificial boundaries, and ground-water flows across the boundaries may be temporally constant or variable and spatially uniform or nonuniform. Physical boundaries include the water-table boundary, base of the aquifer, and northwest mountain-front boundary. Artificial boundaries include the northeast boundary, southeast-flowline boundary, and southwest boundary. Water flows into the model area as (1) underflow (1,225 cubic feet per second (ft3/s)) from the regional aquifer (northeast boundary-constant and nonuniform), (2) underflow (695 ft3/s) from the tributary valleys and mountain fronts (northwest boundary-constant and nonuniform), (3) precipitation recharge (70 ft3/s) (constant and uniform), streamflow-infiltration recharge (95 ft3/s) (variable and nonuniform), wastewater return flows (6 ft3/s) (variable and nonuniform), and irrigation-infiltration recharge (24 ft3/s) (variable and nonuniform) across the water table (water-table boundary-variable and nonuniform), and (4) upward flow across the base of the aquifer (44 ft3/s) (uniform and constant). The southeast-flowline boundary is represented as a no-flow boundary. Water flows out of the model area as underflow (2,037 ft3/s) to the regional aquifer (southwest boundary-variable and nonuniform) and as ground-water withdrawals (45 ft3/s) (water table boundary-variable and nonuniform). Ground-water flow i

Ackerman, Daniel J.; Rattray, Gordon W.; Rousseau, Joseph P.; Davis, Linda C.; Orr, Brennon R.

2006-01-01

290

Mesodictyon, A New Fossil Genus of the Centric Diatom Family Thalassiosiraceae from the Miocene Chalk Hills Formation, Western Snake River Plain, Idaho  

Microsoft Academic Search

Three new centric diatom species assigned to a new genus are described from Miocene lacustrine deposits of Idaho. Species of the new genus, Mesodictyon, have the areola cribrum in the middle of the loculus, strutted processes and radiating, non-fasciculated striae. The strutted processes of M. magnum (diameter 60-150 ?m) have long (2-3 ?m) tubular extensions. The strutted processes of M.

Edward Theriot; J. Platt Bradbury

1987-01-01

291

Petrology of mafic and ultramafic intrusions from the Portneuf-Mauricie Domain, Grenville Province, Canada: Implications for plutonic complexes in a Proterozoic island arc  

NASA Astrophysics Data System (ADS)

The Portneuf-Mauricie Domain (PMD), located in the south-central part of the Grenville Province, comprises several mafic and ultramafic intrusions hosting Ni-Cu ± platinum-group element (PGE) prospects and a former small mining operation (Lac Édouard mine). These meter- to kilometer-scale, sulfide-bearing intrusions display diverse forms, such as layered and tabular bodies with no particular internal structure, and zoned plutons. They were injected ~ 1.40 Ga into a mature oceanic arc, before and during accretion of the arc to the Laurentian margin. The pressure-temperature conditions of the magmas at the beginning of their emplacement were 3 kbar and 1319-1200 °C (according to the petrologic modeling results from this study). The PMD mineralized intrusions are interpreted to represent former magma chambers or magma conduits in the roots of the oceanic arc. The parent magmas of the mineralized intrusions resulted mainly from the partial melting of a mantle source composed of spinel-bearing lherzolite. Petrologic modeling and the occurrence of primary amphibole in the plutonic rocks indicate that these parent melts were basaltic and hydrous. In addition, fractional crystallization modeling and Mg/Fe ratios suggest that most of the intrusions may have formed from evolved magmas, with Mg# = 60, resulting from the fractionation of more primitive magmas (primary magmas, with Mg# = 68). Petrologic modeling demonstrates that 30% fractional crystallization resulted in the primitive to evolved characteristics of the studied intrusive rocks (as indicated by the crystallization sequences and mineral chemistry). Exceptions are the Réservoir Blanc, Boivin, and Rochette West parent magmas, which may have undergone more extensive fractional crystallization, since these intrusions contain pyroxenes that are more iron rich and have lower Mg numbers than pyroxenes in the other PMD intrusions. The PMD mafic and ultramafic intrusions were intruded into an island arc located offshore from the Laurentian continent. Thus, their presence confirms the existence of a well-developed magmatic network (responsible of the fractionation processes) beneath the Proterozoic arc, which resulted in the wide range of compositions observed in the various plutons.

Sappin, A.-A.; Constantin, M.; Clark, T.

2012-12-01

292

Idaho Fish Screening Improvements Final Status Report.  

SciTech Connect

This project funds two Idaho Department of Fish and Game (IDFG) fish habitat biologists to develop, secure funding for, and implement on-the-ground fish habitat improvement projects in the lower Clearwater River drainage and the upper Salmon River drainage. This report summarizes project activity during the first year of funding. The Clearwater Region fish habitat biologist began work on January 28, 2008 and the Salmon Region habitat biologist began on February 11, 2008.

Leitzinger, Eric J.

2008-11-12

293

Idaho Geothermal Commercialization Program. Idaho geothermal handbook  

SciTech Connect

The following topics are covered: geothermal resources in Idaho, market assessment, community needs assessment, geothermal leasing procedures for private lands, Idaho state geothermal leasing procedures - state lands, federal geothermal leasing procedures - federal lands, environmental and regulatory processes, local government regulations, geothermal exploration, geothermal drilling, government funding, private funding, state and federal government assistance programs, and geothermal legislation. (MHR)

Hammer, G.D.; Esposito, L.; Montgomery, M.

1980-03-01

294

Geochemical and Isotopic Evidence for the Origin of Continental Flood Basalts with Particular Reference to the Snake River Plain Idaho, U.S.A  

Microsoft Academic Search

Voluminous outpourings of olivine and quartz tholeiite cover vast tracts of the western U.S.A. around the Columbia and Snake Rivers. Voluminous eruptive units within each province are petrographically and chemically homogeneous and generally lack significant lateral or temporal variation. These features suggest relatively homogeneous source regions. A possible scenario for the Snake River Plain involves extraction of tholeiitic melts from

M. A. Menzies; W. P. Leeman; C. J. Hawkesworth

1984-01-01

295

Summary of analytical results for hydrologic studies of wells open through large intervals of the Snake River plain aquifer at the Idaho National Engineering Laboratory, project 1  

SciTech Connect

This report summarizes results of groundwater analyses for samples collected from wells USGS-44, -45, -46 and -59 in conjunction with the INEL Oversight Program straddle-packer project between 1992 and 1995. The purpose of this project was to develop and deploy a high-quality straddle-packer system for characterization of the three-dimensional geometry of solute plumes and aquifer hydrology near the Idaho Chemical Processing Plant (ICPP). Principle objectives included (1) characterizing vertical variations in aquifer chemistry; (2) documenting deviations in aquifer chemistry from that monitored by the existing network, and (3) making recommendations for improving monitoring efforts.

McCurry, M.; Welhan, J.A.

1996-07-01

296

Water resources data, Idaho, 2004; Volume 2. Surface water records for Upper Columbia River basin and Great Basin below King Hill  

USGS Publications Warehouse

Water resources data for the 2004 water year for Idaho consists of records of stage, discharge, and water quality of streams; stage, contents, and water quality of lakes and reservoirs; discharge of irrigation diversions; and water levels and water quality of groundwater. The three volumes of this report contain discharge records for 209 stream-gaging stations and 8 irrigation diversions; stage only records for 6 stream-gaging stations; stage only for 6 lakes and reservoirs; contents only for 13 lakes and reservoirs; water-quality for 39 stream-gaging stations and partial record sites, 3 lakes sites, and 395 groundwater wells; and water levels for 425 observation network wells. Additional water data were collected at various sites not involved in the systematic data collection program and are published as miscellaneous measurements. Volumes 1 & 2 contain the surface-water and surface-water-quality records. Volume 3 contains the ground-water and ground-water-quality records. These data represent that part of the National Water Data System operated by the U.S. Geological Survey and cooperating State and Federal agencies in Idaho, adjacent States, and Canada.

Brennan, T.S.; Lehmann, A.K.; O'Dell, I.

2005-01-01

297

Water resources data, Idaho, 2003; Volume 2. Surface water records for Upper Columbia River basin and Great Basin below King Hill  

USGS Publications Warehouse

Water resources data for the 2003 water year for Idaho consists of records of stage, discharge, and water quality of streams; stage, contents, and water quality of lakes and reservoirs; discharge of irrigation diversions; and water levels and water quality of groundwater. The three volumes of this report contain discharge records for 208 stream-gaging stations and 14 irrigation diversions; stage only records for 6 stream-gaging stations; stage only for 6 lakes and reservoirs; contents only for 13 lakes and reservoirs; water-quality for 50 stream-gaging stations and partial record sites, 3 lakes sites, and 398 groundwater wells; and water levels for 427 observation network wells and 900 special project wells. Additional water data were collected at various sites not involved in the systematic data collection program and are published as miscellaneous measurements. Volumes 1 & 2 contain the surface-water and surface-water-quality records. Volume 3 contains the ground-water and ground-water-quality records. These data represent that part of the National Water Data System operated by the U.S. Geological Survey and cooperating State and Federal agencies in Idaho, adjacent States, and Canada.

Brennan, T.S.; Lehmann, A.K.; O'Dell, I.

2004-01-01

298

Influence of the diversion of Bear River into Bear Lake (Utah and Idaho) on the environment of deposition of carbonate minerals  

Microsoft Academic Search

Bear River, the largest river in the Great Basin, had some of its flow diverted into Bear Lake through a series of canals constructed between 1911 and 1918, turning Bear Lake into a reservoir. The prediversion lake had an unusually high Mg2+ :C a2+ ratio (38 by weight), which resulted in precipitation of CaCO3 as aragonite. The amount and mineralogy

Walter E. Dean; Richard M. Forester; Jordon Bright; Roger Y. Anderson

2007-01-01

299

High-K alkali basalts of the Western Snake River Plain (Idaho): Abrupt transition from tholeiitic to mildly alkaline plume-derived basalts  

Microsoft Academic Search

Basaltic volcanism in the western Snake River Plain underwent an abrupt change circa ~700 ka to 900 ka, from low-K tholeiitic basalt and ferrobasalt to high-K transitional alkali basalt. The low-K tholeiitic basalts share major element, trace element, and isotopic characteristics with olivine tholeiites of the eastern Snake River Plain, and must have been derived by similar processes from similar sources. In

John W. Shervais; Scott K. Vetter

2009-01-01

300

Agricultural land-use classification using landsat imagery data, and estimates of irrigation water use in Gooding, Jerome, Lincoln, and Minidoka counties, 1992 water year, Upper Snake River basin, Idaho and western Wyoming  

USGS Publications Warehouse

As part of the U.S. Geological Survey's National Water-Quality Assessment Program in the upper Snake River Basin study unit, land- and water-use data were used to describe activities that have potential effects on water quality, including biological conditions, in the basin. Land-use maps and estimates of water use by irrigated agriculture were needed for Gooding, Jerome, Lincoln, and Minidoka Counties (south-central Idaho), four of the most intensively irrigated counties in the study unit. Land use in the four counties was mapped from Landsat Thematic Mapper imagery data for the 1992 water year using the SPECTRUM computer program. Land-use data were field verified in 108 randomly selected sections (640 acres each); results compared favorably with land-use maps from other sources. Water used for irrigation during the 1992 water year was estimated using land-use and ancillary data. In 1992, a drought year, estimated irrigation withdrawals in the four counties were about 2.9 million acre-feet of water. Of the 2.9 million acre-feet, an estimated 2.12 million acre-feet of water was withdrawn from surface water, mainly the Snake River, and nearly 776,000 acre-feet was withdrawn from ground water. One-half of the 2.9 million acre-feet of water withdrawn for irrigation was considered to be lost during conveyance or was returned to the Snake River; the remainder was consumptively used by crops during the growing season.

Maupin, Molly A.

1997-01-01

301

Dillon quadrangle, Montana and Idaho  

SciTech Connect

All geologic conditions in the Dillon quadrangle (Montana and Idaho) have been thoroughly examined, and, using National Uranium Resource Evaluation criteria, environments are favorable for uranium deposits along fractured zones of Precambrian Y metasediments, in the McGowan Creek Formation, and in some Tertiary sedimentary basins. A 9-m-wide quartz-bearing fractured zone in Precambrian Y quartzites near Gibbonsville contains 175 ppM uranium, probably derived from formerly overlying Challis Volcanics by supergene processes. The Mississippian McGowan Creek Formation consists of uraniferous, black, siliceous mudstone and chert. In the Melrose district it has been fractured by a low-angle fault, and uranium has been further concentrated by circulating ground water in the 2- to 6-m-thick brecciated zones that in outcrop contain 90 to 170 ppM uranium. The Wise River, northern Divide Creek, Jefferson River, Salmon River, Horse Prairie, Beaverhead River, and upper Ruby River Basins are considered favorable for uranium deposits in sandstone. Present are suitable uraniferous source rocks such as the Boulder batholith, rhyolitic flow breccia, laharic deposits, or strongly welded tuffs; permeable sediments, including most sandstones and conglomerates, providing they do not contain devitrified glass; suitable reductants such as lignite, pyrite, or low-Eh geothermal water; and uranium occurrences.

Wodzicki, A.; Krason, J.

1981-04-01

302

Chinook Salmon Adult Abundance Monitoring; Hydroacoustic Assessment of Chinook Salmon Escapement to the Secesh River, Idaho, 2002-2004 Final Report.  

SciTech Connect

Accurate determination of adult salmon spawner abundance is key to the assessment of recovery actions for wild Snake River spring/summer Chinook salmon (Onchorynchus tshawytscha), a species listed as 'threatened' under the Endangered Species Act (ESA). As part of the Bonneville Power Administration Fish and Wildlife Program, the Nez Perce Tribe operates an experimental project in the South Fork of the Salmon River subbasin. The project has involved noninvasive monitoring of Chinook salmon escapement on the Secesh River between 1997 and 2000 and on Lake Creek since 1998. The overall goal of this project is to accurately estimate adult Chinook salmon spawning escapement numbers to the Secesh River and Lake Creek. Using time-lapse underwater video technology in conjunction with their fish counting stations, Nez Perce researchers have successfully collected information on adult Chinook salmon spawner abundance, run timing, and fish-per-redd numbers on Lake Creek since 1998. However, the larger stream environment in the Secesh River prevented successful implementation of the underwater video technique to enumerate adult Chinook salmon abundance. High stream discharge and debris loads in the Secesh caused failure of the temporary fish counting station, preventing coverage of the early migrating portion of the spawning run. Accurate adult abundance information could not be obtained on the Secesh with the underwater video method. Consequently, the Nez Perce Tribe now is evaluating advanced technologies and methodologies for measuring adult Chinook salmon abundance in the Secesh River. In 2003, the use of an acoustic camera for assessing spawner escapement was examined. Pacific Northwest National Laboratory, in a collaborative arrangement with the Nez Perce Tribe, provided the technical expertise to implement the acoustic camera component of the counting station on the Secesh River. This report documents the first year of a proposed three-year study to determine the efficacy of using an acoustic camera to count adult migrant Chinook salmon as they make their way to the spawning grounds on the Secesh River and Lake Creek. A phased approach to applying the acoustic camera was proposed, starting with testing and evaluation in spring 2003, followed by a full implementation in 2004 and 2005. The goal of this effort is to better assess the early run components when water clarity and night visibility preclude the use of optical techniques. A single acoustic camera was used to test the technology for enumerating adult salmon passage at the Secesh River. The acoustic camera was deployed on the Secesh at a site engineered with an artificial substrate to control the river bottom morphometry and the passage channel. The primary goal of the analysis for this first year of deployment was to validate counts of migrant salmon. The validation plan involved covering the area with optical video cameras so that both optical and acoustic camera images of the same viewing region could be acquired simultaneously. A secondary test was contrived after the fish passage was complete using a controlled setting at the Pacific Northwest National Laboratory in Richland, Washington, in which we tested the detectability as a function of turbidity levels. Optical and acoustic camera multiplexed video recordings of adult Chinook salmon were made at the Secesh River fish counting station from August 20 through August 29, 2003. The acoustic camera performed as well as or better than the optical camera at detecting adult Chinook salmon over the 10-day test period. However, the acoustic camera was not perfect; the data reflected adult Chinook salmon detections made by the optical camera that were missed by the acoustic camera. The conditions for counting using the optical camera were near ideal, with shallow clear water and good light penetration. The relative performance of the acoustic camera is expected to be even better than the optical camera in early spring when water clarity and light penetration are limited. Results of the laboratory tests at the Pacific North

Johnson, R.; McKinstry, C.; Mueller, R.

2004-01-01

303

ANALYSIS OF DATA ON NUTRIENTS AND ORGANIC COMPOUNDS IN GROUND WATER IN THE UPPER SNAKE RIVER BASIN, IDAHO AND WESTERN WYOMING, 1980-91  

EPA Science Inventory

Nutrient and organic compound data from the U.S. Geological Survey and the U.S. Environmental Protection Agency STORET data bases provided information for development of a preliminary conceptual model of spatial and temporal ground-water quality in the upper Snake River Basin (17...

304

Chemical Stratigraphy of Basalts From the 5000' Borehole NPR-E\\/WO2, Eastern Snake River Plain, Idaho: Evidence for Mixed Asthenosphere-Lithosphere Sources  

Microsoft Academic Search

Basaltic volcanism in the eastern Snake River Plain presents a fundamental conundrum: the major and trace element concentrations of these basalts suggest derivation from an asthenospheric source, consisting of depleted mantle and possibly a Yellowstone plume component, whereas isotopes suggest derivation from an enriched lithospheric source similar to that which underlies the Archean Wyoming province. We have analyzed 59 whole

J. W. Shervais; B. B. Hanan; S. K. Vetter

2003-01-01

305

Evaluation of Quality-Assurance\\/Quality-Control Data Collected by the U.S. Geological Survey from Wells and Springs between the Southern Boundary of the Idaho National Engineering and Environmental Laboratory and the Hagerman Area, Idaho, 1989 through 1995  

Microsoft Academic Search

The U.S. Geological (USGS) and the Idaho Department of Water Resources, in cooperation with the U.S. Department of Energy, collected and analyzed water samples to monitor the water quality of the Snake River Plain aquifer from the southern boundary of the Idaho National Engineering and Environmental Laboratory to the Hagerman area, Idaho. Concurrently, replicate samples and blank samples were collected

L. M. Williams; R. C. Bartholomay; L. J. Campbell

1998-01-01

306

A Long-Term Comparison of Redband Trout Distribution, Density, and Size Structure in Southwestern Idaho  

Microsoft Academic Search

During 1993–2003, we reexamined the density and size structure of populations of Columbia River redband trout Oncorhynchus mykiss gairdneri at 43 sites in sagebrush desert basins of southwestern Idaho. Trout density had originally been sampled at these sites during 1977–1982. Populations were sampled in four major drainages of the Snake River basin: Bruneau River, Jordan Creek, Owyhee River, and Snake

Bruce W. Zoellick; Dale B. Allen; Brian J. Flatter

2005-01-01

307

Aquifer tests near the Idaho Falls Foothills, Idaho  

SciTech Connect

Ground water pumping tests were performed in two wells located in the foothills east of Idaho Falls to determine the aquifer characteristics at these locations. These data were used to differentiate this aquifer from the Snake River Plain aquifer. The wells were pumped at rates of 11 and 14 gallons per minute with 0.03 and 0.04 ft of drawdown measured in the pumping wells. The transmissivity is estimated to be 525,000 gpd/ft and 450,000 gpd/ft, respectively. The hydraulic conductivity is 925 ft/day and 1,070 ft/day, respectively. These hydraulic conductivities are similar to those measured in the Snake River Plain aquifer. Water level data in these wells are consistent with the water table in the Snake River Plain aquifer and indicates ground water movement from the foothills toward the Plain. The high transmissivity suggests water may move rapidly from the foothills area to mix with water in the Snake River Plain aquifer. Elevated water temperatures (76 and 70{degrees}F) and high specific conductivities in these wells indicate the presence of a foothills aquifer with characteristics that can be used to separate the two aquifer systems.

Hubbell, J.M.

1991-10-03

308

Activities of the National Water-Quality Assessment Program in the upper Snake River Basin, Idaho and western Wyoming, 1991-2001  

USGS Publications Warehouse

In 1991, the U.S. Geological Survey (USGS) began a full-scale National Water-Quality Assessment (NAWQA) Program. The long-term goals of the NAWQA Program are to describe the status and trends in the water quality of a large part of the Nation's rivers and aquifers and to improve understanding of the primary natural and human factors that affect water-quality conditions. In meeting these goals, the program will produce water-quality, ecological, and geographic information that will be useful to policy makers and managers at the national, State, and local levels. A major component of the program is study-unit investigations, upon which national-level assessment activities are based. The program's 60 study-unit investigations are associated with principal river basins and aquifer systems throughout the Nation. Study units encompass areas from 1,200 to more than 65,000 mi2 (square miles) and incorporate about 60 to 70 percent of the Nation's water use and population served by public water supply. In 1991, the upper Snake River Basin was among the first 20 NAWQA study units selected for implementation. From 1991 to 1995, a high-intensity data-collection phase of the upper Snake River Basin study unit (fig. 1) was implemented and completed. Components of this phase are described in a report by Gilliom and others (1995). In 1997, a low-intensity phase of data collection began, and work continued on data analysis, report writing, and data documentation and archiving activities that began in 1996. Principal data-collection activities during the low-intensity phase will include monitoring of surface-water and ground-water quality, assessment of aquatic biological conditions, and continued compilation of environmental setting information.

Low, Walton H.

1997-01-01

309

Lava flow-field emplacement at Rock Corral Butte, Eastern Snake River Plains, Idaho: It's doesn't look like Hawaii from here  

Microsoft Academic Search

Rock Corral Butte (RCB) is a basaltic shield volcano located at 43° 22.25'N, 113° 1.20'W within the Eastern Snake River Plains. The summit region is characterized by complex topography associated with late-stage eruption of spatter. Rock Corral Butte is surrounded by a large flow field (>16 km2) that is remarkable for its rolling, 2 to 4-m-scale topography that is superposed

T. K. Gregg; S. Hughes; S. E. Sakimoto

2004-01-01

310

Department of Energy Programmatic Spent Nuclear Fuel Management and Idaho National Engineering Laboratory Environmental Restoration and Waste Management Programs Draft Environmental Impact Statement. Volume 1, Appendix C, Savannah River Site Spent Nuclear Fuel Mangement Program  

SciTech Connect

The US Department of Energy (DOE) is engaged in two related decision making processes concerning: (1) the transportation, receipt, processing, and storage of spent nuclear fuel (SNF) at the DOE Idaho National Engineering Laboratory (INEL) which will focus on the next 10 years; and (2) programmatic decisions on future spent nuclear fuel management which will emphasize the next 40 years. DOE is analyzing the environmental consequences of these spent nuclear fuel management actions in this two-volume Environmental Impact Statement (EIS). Volume 1 supports broad programmatic decisions that will have applicability across the DOE complex and describes in detail the purpose and need for this DOE action. Volume 2 is specific to actions at the INEL. This document, which limits its discussion to the Savannah River Site (SRS) spent nuclear fuel management program, supports Volume 1 of the EIS. Following the introduction, Chapter 2 contains background information related to the SRS and the framework of environmental regulations pertinent to spent nuclear fuel management. Chapter 3 identifies spent nuclear fuel management alternatives that DOE could implement at the SRS, and summarizes their potential environmental consequences. Chapter 4 describes the existing environmental resources of the SRS that spent nuclear fuel activities could affect. Chapter 5 analyzes in detail the environmental consequences of each spent nuclear fuel management alternative and describes cumulative impacts. The chapter also contains information on unavoidable adverse impacts, commitment of resources, short-term use of the environment and mitigation measures.

Not Available

1994-06-01

311

Physical, chemical, and biological characteristics of the Boise River from Veterans Memorial Parkway, Boise to Star, Idaho, October 1987 to March 1988  

USGS Publications Warehouse

Physical, chemical, and biological characteristics of the Boise River were examined from October 1987 to March 1988 to determine whether trace elements in effluents from two Boise wastewater treatment facilities were detrimental to aquatic communities. Cadmium, chromium, hexavalent chromium, cyanide, lead, nickel, and silver concentrations in the Boise River were less than or near analytical detection levels and were less than chronic toxicity criteria when detectable. Arsenic, copper, and zinc were detected in concentrations less than chronic toxicity criteria. Concentrations of trace elements in bottom material generally were small and could not be attributed to effluents from wastewater treatment facilities. From October to December 1987, mean density of benthic invertebrates colonizing artificial substrates was from 6,100 individuals/substrate downstream from the West Boise wastewater treatment facility to 14,000 individuals per substrate downstream from the Lander Street wastewater treatment facility. From January to March 1988 , mean density of benthic invertebrates colonizing artificial substrates was from 7,100 individuals per substrate downstream from the West Boise facility to 10,000 individuals per substrate near Star. Insect communities upstream and downstream from the wastewater treatment facilities were strongly associated, and coeffients of community loss indicated that effluents had benign enriching effects. Distribution of mayflies indicates that trace-element concentrations in effluents did not adversely affect intolerant organisms in the Boise River. Condition factor of whitefish was significantly increased downstream from the Lander Street wastewater treatment facility and was significantly decreased downstream from the West Boise wastewater treatment facility.

Frenzel, S. A.

1988-01-01

312

Concentrations and loads of cadmium, zinc, and lead in the main stem Coeur d'Alene River, Idaho—March, June, September, and October 1999  

USGS Publications Warehouse

of the effects of different river discharges and lake levels of Coeur d'Alene Lake on the transport of cadmium, zinc, and lead within the main stem Coeur d'Alene River. In particular, water-quality data and loads during a broad range of hydrologic conditions were examined to determine if the river channel, flood plain, and associated ground water along the main stem Coeur d'Alene River acted as sources or sinks of trace elements. Water-quality samples were collected at six riverine stations and one lake station along a 35-mile reach during March, June, September, and October of 1999. Samples were analyzed for whole-water recoverable, filtered (0.45 micrometer), and dissolved (0.01 micrometer) concentrations of cadmium, zinc, and lead. Concentrations and loads of cadmium and zinc measured during the four sampling trips were predominately in the filtered and dissolved fraction ,rather than particulate. The smallest concentrations were measured during the June sampling trip when flows were high and snowmelt runoff diluted riverine concentrations. Conversely, the largest concentrations were measured during the latter two sampling trips when flows were low because a larger proportion of the river's discharge was contributed by ground-water inflow. During each sampling trip, cadmium and zinc concentrations generally decreased in a downstream directioeven as discharge increased in a downstream direction. Spatial and temporal trends exhibited by lead concentrations and loads during the four sampling trips were different from those of cadmium and zinc because of the propensity for lead to adsorb to sediment particles. Whole-water recoverable lead concentrations and loads during the four sampling trips were predominantly in the particulate fraction, with filtered and dissolved concentrations and loads composing a much smaller proportion of the recoverable fraction compared to cadmium and zinc. Filtered lead concentrations generally increased at a faster rate in the downstream direction than dissolved lead concentrations; thus, colloidallead either was being formed by complexation reactions or being added by sediment erosion in the downstream direction.

Woods, P. F.

2001-01-01

313

Idaho Special Education Manual.  

ERIC Educational Resources Information Center

This manual is a set of guidelines to assist Idaho school districts in carrying out the provisions of the Individuals with Disabilities Education Act (IDEA) Amendments of 1997, and its implementing regulations which became final on March 12, 1999. The manual also incorporates changes in Administrative Rules of the Idaho State Board of Education,…

Idaho State Dept. of Education. Special Education Section.

314

Idaho Explosives Detection System  

Microsoft Academic Search

The Idaho Explosives Detection System was developed at the Idaho National Laboratory (INL) to respond to threats imposed by delivery trucks potentially carrying explosives into military bases. A full-scale prototype system has been built and is currently undergoing testing. The system consists of two racks, one on each side of a subject vehicle. Each rack includes a neutron generator and

Edward L. Reber; Larry G. Blackwood; Andrew J. Edwards; J. Keith Jewell; Kenneth W. Rohde; Edward H. Seabury; Jeffery B. Klinger

2005-01-01

315

Tritium, stable isotopes, and nitrogen in flow from selected springs that discharge to the Snake River, Twin Falls-Hagerman area, Idaho, 1990-93  

USGS Publications Warehouse

In 1990-93, water from 19 springs along the north side of the Snake River near Twin Falls and Hagerman contained from 9.2+0.6 to 78.4+5.1 picocuries per liter (pCi/L) of tritium. The springs were placed into three categories based on their locations and tritium concentrations: Category I was the upstream most and contained from 52.8+3.2 to 78.4+5.1 pCi/L of tritium; Category 11 was downstream from those in Category I and contained from 9.2+0.6 to 18.6+1.2 pCi/L; and Category III was the farthest downstream and contained from 28.3+1.9 to 47.7+3.2 pCi/L. Differences in tritium concentrations in the Category I, II, and III springs are a function of the ground-water flow regime, land use, and irrigation practices in and hydraulically upgradient from each category of springs. A comparatively large part of the water from the Category I springs is derived from recharge in heavily irrigated areas in which the irrigation water largely is diverted from the Snake River. A large part of the recharge for Category II springs occurs as much as 140 miles upgradient. Tritium concentrations in Category III springs indicate an intermediate proportion of the recharge is from excess applied-irrigation water. The concept that recharge from excess applied- irrigation water from the Snake River has affected tritium in the aquifer is supported by isotopic and nitrogen data. Deuterium and oxygen-18 isotopic values, and nitrite plus nitrate as nitrogen concentrations in the flow of some springs has been impacted by irrigation.

Mann, L.J.; Low, W.H.

1994-01-01

316

Concentrations of metals associated with mining waste in sediments, biofilm, benthic macroinvertebrates, and fish from the Coeur d'Alene River basin, Idaho.  

PubMed

Arsenic, Cd, Cu, Pb, Hg, and Zn were measured in sediments, biofilm, benthic macroinvertebrates, and fish from the Coeur d'Alene (CDA) River to characterize the pathway of metals transfer between these components. Metals enter the CDA Basin via tributaries where mining activities have occurred. In general, the ranking of food-web components from the greatest to smallest concentrations of metals was as follows: biofilm (the layer of abiotic and biotic material on rock surfaces) and sediments > invertebrates > whole fish. Elevated Pb was documented in invertebrates, and elevated Cd and Zn were documented in sediment and biofilm approximately 80 km downstream to the Spokane River. The accumulation of metals in invertebrates was dependent on functional feeding group and shredders-scrapers that feed on biofilm accumulated the largest concentrations of metals. Although the absolute concentrations of metals were the largest in biofilm and sediments, the metals have accumulated in fish approximately 50 km downstream from Kellogg, near the town of Harrison. While metals do not biomagnify between trophic levels, the metals in the CDA Basin are bioavailable and do biotransfer. Trout less than 100 mm long feed exclusively on small invertebrates, and small invertebrates accumulate greater concentrations of metals than large invertebrates. Therefore, early-lifestage fish may be exposed to a larger dose of metals than adults. PMID:9469853

Farag, A M; Woodward, D F; Goldstein, J N; Brumbaugh, W; Meyer, J S

1998-02-01

317

Influence of the diversion of Bear River into Bear Lake (Utah and Idaho) on the environment of deposition of carbonate minerals  

USGS Publications Warehouse

Bear River, the largest river in the Great Basin, had some of its flow diverted into Bear Lake through a series of canals constructed between 1911 and 1918, turning Bear Lake into a reservoir. The prediversion lake had an unusually high Mg2+ : Ca2+ ratio (38 by weight), which resulted in precipitation of CaCO3 as aragonite. The amount and mineralogy of the carbonate did not change immediately after the diversion, but during the middle of the 20th century, high-Mg calcite began to precipitate. In contrast, at the time of diversion there were very distinct changes in the isotopic composition of the carbonate that clearly define the time of diversion within the sediments. Sediment-trap studies show that the CaCO3 polymorph that precipitates in the epilimnion of the lake today is high-Mg calcite. Samples in sediment traps placed 2 m above the bottom of the lake in 45 m of water (bottom traps) contain predominantly aragonite and quartz, with lesser amounts of high-Mg and low-Mg calcite and dolomite. Isotopic evidence from the sediments shows that the aragonite that accumulated in the bottom sediment traps and that constitutes the bulk of postdiversion sediments is reworked and redistributed from shallow sites to deep sites. ?? 2007, by the American Society of Limnology and Oceanography, Inc.

Dean, W.E.; Forester, R.M.; Bright, J.; Anderson, R.Y.

2007-01-01

318

Fire protection review, Westinghouse Idaho Nuclear Company, Idaho Falls, Idaho  

SciTech Connect

A fire protection survey was conducted for the Department of Energy at the Westinghouse Idaho Nuclear Company, INC., Idaho Falls, Idaho, on April 24--27, April 30--May 4, June 4--8, and June 11--15, 1990. The purpose of the survey was to review the facility's fire protection program and to make recommendations according to the following criteria established by the Department of Energy: (1) Recommendations which would be made as the result of an improved risk or Highly Protected Risk (HPR) fire inspection of an industrial insured facility. (2) Identification of areas which are presently not protected or are inadequately protected where provision of automatic protection would reduce a fire or explosion loss to less than $1 million. (3) Identification of areas where loss potentials exceed $50 million assuming a failure of automatic protection systems and subsequent reliance only on separation and fire walls. (4) Evaluation of adequacy of compliance with recommendations made in prior surveys. Findings and recommendations in this report reflect to some degree the relative importance of the operation and the time to restore it to useful condition in the event that a loss were to occur.

Dobson, P.H.

1990-10-01

319

Response of RRGI 6 and RRGI 7 to injection during the 5-MW plant operations, March 25 to June 15, 1982, at Raft River, Idaho  

SciTech Connect

Injection testing conducted between March 25 and June 15, 1982 at the Raft River Site generated a substantial quantity of non-isothermal and various temperature transient pressure data. Injection pressure build-up measured at the wellhead strongly responds to temperature changes of the injected fluid. An increase in the fluid temperature results in an injection pressure increase while a temperature decrease is followed by an injection pressure decline. Data analyses indicate that changes in fluid viscosity and density due to temperature changes do not explain pressure build-up responses. The pressure build-up behaviors are attributed to the reservoir transmissivity changes. The absolute wellhead pressure value are significantly lower than predicted for the cold fluid injection.

Skiba, P.A.

1982-01-01

320

Surface-water data for Idaho, 1971-75  

USGS Publications Warehouse

Surface-water data collection began in Idaho in 1889 with the establishment of three gaging stations: Snake River at Eagle Rock (now Idaho Falls), Big Wood River near Hailey, and Bear River at Preston. Following passage of the National Reclamation Act of 1902, a notable increase in investigations of water resources began throughout the Western United States. Although Idaho enacted laws in 1903 to activate stream-gaging programs, it was no until 1909 that the State entered into a formal agreement with the U.S. Geological Survey from this work. Since that time, except for a hiatus from 1914-18, the Federal-State cooperative program of water-resources investigations has continued uninterrupted to the present.

Cordes, S.C.

1980-01-01

321

Idaho bats: Yuma bat (Myotis yumanensis) Idaho bats: little brown bat (Myotis lucifugus) Idaho bats: California bat (Myotis californicus) Idaho bats: long-legged bat (Myotis volans)  

E-print Network

9/26/12 1 Idaho bats: Yuma bat (Myotis yumanensis) Idaho bats: little brown bat (Myotis lucifugus) Idaho bats: California bat (Myotis californicus) Idaho bats: long-legged bat (Myotis volans) #12;9/26/12 2 Idaho bats: fringed bat (Myotis thysanodes) Idaho bats: long-eared bat (Myotis evotis) Idaho bats

Sullivan, Jack

322

An early history of pure shear in the upper plate of the raft river metamorphic core complex: black pine mountains, southern Idaho  

NASA Astrophysics Data System (ADS)

Although commonly obscured by simple shear, pure shear fabrics occur locally within many metamorphic core complexes. The cover rocks to the Raft River metamorphic core complex exposed within the Black Pine Mountains display an early coaxial strain history which developed prior to the formation of low-angle fault-bounded allochthons. At higher structural levels this is documented by pressure shadows with straight sutures, and oppositely-rotated antitaxial calcite veins. These rocks were sub-horizontally extended parallel to bedding, by up to 160%, in an ? E-W direction. The marbles of the lowest exposed levels exhibit well-developed crystallographic preferred orientation fabrics. Calcite c- and a-axis pole figures are symmetric to slightly asymmetric, with obliquities ranging from 0° to 8°, which indicate that the percent pure shear ranges between 100 and 76%. Initial constraints on the timing of this layer-parallel extension suggest that extension was occurring locally within the Sevier belt hinterland during the late Cretaceous. These data, coupled with previous studies, suggest that pure shear might be a much more common component of strain in rocks deformed in extensional environments than is generally acknowledged.

Wells, Michael L.; Allmendinger, Richard W.

323

A monoclinic, pseudo-orthorhombic Au-Hg mineral of potential economic significance in Pleistocene Snake River alluvial deposits of southeastern Idaho  

USGS Publications Warehouse

A mineral with the approximate composition of Au94Hg6 - Au88Hg12 (atomic %) has been identified in Pleistocene Snake River alluvial deposits. The gold-mercury mineral occurs as very small grains or as polycrystalline masses composed of subhedral to nearly euhedral attached crystals. Vibratory cold-polishing techniques with 0.05-??m alumina abrasive for polished sections revealed a porous internal texture for most subhedral crystals after 48-72 hours of treatment. Thus, optical character (isotropic or anisotropic) could not be determined by reflected-light microscopy, and pore-free areas were too small for measurement of reflectance. X-ray-diffraction lines rather than individual reflections (spots), on powder camera X-ray films of unrotated spindles of single grains that morphologically appear to be single crystals, indicate that individual subhedral or euhedral crystals are composed of domains in random orientation. Thus, no material was found suitable for single-crystal X-ray diffraction studies. -from Authors

Desborough, G.A.; Foord, E.E.

1992-01-01

324

Gravity interpretation of the northern Overthrust Belt, Idaho and Wyoming  

E-print Network

). Stratigraphic +hrow on the major faults is approximately 20, 000 feet (6100 m) (Armstrong and Oriel, 1965). 1 LB I I 2 V V 4 T V V SNAKE v ' RIVER PLAIN ) I V V 4 F . L. ~. + + L k'22 Ace v v P IDAHO Tco WYOMING ~ F CI IJTI E ON IFF... overthrust. The Paris thrust is part of the Pari s-!!i liard thrust zone which lies to the west of the Bear Lake in Idaho, extends possibly as far as the Snake River Plain to the north, and continues into Utah on the south. As documented by surface...

Silver, Wendy Ilene

2012-06-07

325

Scale-dependent genetic structure of the Idaho giant salamander (Dicamptodon aterrimus) in stream networks  

Microsoft Academic Search

The network architecture of streams and rivers constrains evolutionary, demographic and ecological processes of freshwater organisms. This consistent architecture also makes stream networks useful for testing general models of population genetic structure and the scaling of gene flow. We examined genetic structure and gene flow in the facultatively paedomorphic Idaho giant salamander, Dicamptodon aterrimus, in stream networks of Idaho and

LINDY B. M ULLEN; H. A RTHUR; W OODS; AEL K. S CHWARTZ; DAM J. S EPULVEDA; H. L OWE

2010-01-01

326

UPPER SNAKE BASIN, IDAHO WATER QUALITY MONITORING ASSESSMENT REPORT, PHASE I. 1971  

EPA Science Inventory

The Upper Snake River Basin, Idaho (17040104, 170402) was studied in an effort to establish a monitoring network from above Idaho Falls to Milner Dam. The object was to provide timely data and information pertaining to the priority problems of the basin and to be responsive to t...

327

Nest-site selection by sage thrashers in southeastern Idaho. [Oreoscoptes montanus  

Microsoft Academic Search

Nest sites selected by Sage Thrashers (Oreoscoptes montanus) were characterized and compared with available habitat. The study area, consisting of 25 ha of sagebrush shrubsteppe on the upper Snake River plain 11 km south of Howe, Idaho, is administered by the U.S. Department of Energy as part of the Idaho National Engineering Laboratory (INEL). Microhabitats within 5 m of nests

K. L. Petersen; L. B. Best

1991-01-01

328

The search for oil and gas in Idaho  

SciTech Connect

Between 1903 and 1988, approximately 145 wells were drilled to explore for commercial hydrocarbon deposits in Idaho. Although deep drilling has thus far failed to locate oil or gas reserves, a wealth of geological, geophysical, and geochemical data have been collected, and areas worthy of more exploration have been identified. The wells also have encountered potable groundwater, potential geothermal resources, evaporites, phosphate rock, and brine that may one day prove to be of economic significance. Most exploration has occurred in two geologic provinces: (1) the upper Tertiary sediments and interbedded volcanic rocks of ancient Lake Idaho that underlie the western Snake River Plain, and (2) the predominantly marine Paleozoic and Mesozoic sedimentary rocks in the thrust belt of southeast Idaho. Additional scattered deep tests have penetrated the eastern Snake River Plain, the Cassia and Beaverhead-Centennial mountain areas, the Idaho panhandle, and the eastern margin of the Columbia Plateau. Of all the regions explored, the northern part of the Idaho thrust belt beneath the Caribou Range appears most promising for future exploration. It is characterized by prominent surface anticlines, a thick stratigraphic section from Cambrian through fine-grained Cretaceous rocks, the potential for source and reservoir beds, and numerous oil and gas shows. In contrast to other areas of the Idaho thrust belt, deep formations also contain connate water, suggesting effective early sealing of prospective reservoir beds.

McLeod, J.D. (Eastern Washington Univ., Cheney, WA (United States))

1993-08-01

329

2.-A PRELIMINARY REPORT UPON SALMON INVESTIGATIONS IN IDAHO By BARTON W. EVERMANN, PH. D.,  

E-print Network

of the State of Idaho. . , The alarming'decrease in the salmon catch of the Columbia River within recent years in the Columbia River Basin in regard to the Salmon Fisheries; issued as Senate Mis. Doc. No. 200, Fifty localities: (1) The streams and lakes at the headwaters of the Salmon River; (2) the streams and lakes

330

Secular variation of the middle and late Miocene geomagnetic field recorded by the Columbia River Basalt Group in Oregon, Idaho and Washington, USA  

NASA Astrophysics Data System (ADS)

This study of 118 discrete volcanic flows from the Columbia River Basalt Group is aimed to determine their distribution of geomagnetic field directions and virtual geomagnetic poles (VGPs) and to compare the inherent secular variation parameters with those from other studies. The magnetic signature of these rocks is uniformly carried by primary titanomagnetite, indicating that magnetic changes are due to variations in the magnetic field. Although most flows are flat lying, those that are tilted pass the Tauxe and Watson tilt test. Sequential flows with statistically similar site means were grouped, and directions that were considered outliers were evaluated and removed using the Vandamme cut-off method. Three normal-polarity (N-polarity) and three reversed-polarity (R-polarity) intervals are revealed by the stratigraphically ordered flows and have mean directions of N polarity (dec/inc = 6.6°/+61.2°, k = 29.3, ?95 = 4.2°), and R polarity (dec/inc = 178.2°/-59.2°, k = 16, ?95 = 5.5°). Regression analysis indicates that the secular variation analysis has not been affected by regional rotation, and that apparent polar wander is negligible. The VGP distribution is almost perfectly circular and supports the preference of VGP positions for the dispersion analysis. Dispersion parameters with corrections for within-site scatter (Sb) show a range of 14.3°-25.5°, including error limits, and were consistently higher for R-polarity results than for those of N polarity. Published dispersion parameters for extrusives <5 Ma show Sb values slightly lower than ours, yielding values of 16°-19°, although the difference is not statistically significant. In contrast, published dispersion parameters from high quality data from the Cretaceous Normal Superchron are lower than those for the Neogene, which suggests that the noisiness of the magnetic field correlates with the frequency of reversals. Our new results allow us to extend the Plio-Pleistocene palaeosecular variation database to the bottom of the middle Miocene. Many Miocene formations on a variety of continents are suitable targets for future analysis. Furthermore, the significant difference between the reversed and N-polarity dispersion parameters is intriguing and needs substantiation.

Dominguez, Ada R.; Van der Voo, Rob

2014-06-01

331

Dubois Quadrangle, Idaho and Montana  

SciTech Connect

Within the Dubois Quadrangle (Idaho and Montana), environments favorable for uranium deposits, based on National Uranium Resource Evaluation criteria, occur in the McGowan Creek Formation and within some Tertiary sedimentary basins. The Mississippian McGowan Creek Formation consists of uraniferous, black, siliceous mudstone and chert with minor porous sedimentary channels. In the southern Beaverhead Mountains it has been fractured by a bedding-plane fault, and uranium has been further concentrated by circulating groundwater in the porous channels and brecciated zones, both of which contain about 200 ppM uranium. The northern parts of the Pahsimeroi River, Lemhi River, Medicine Lodge Creek, Horse Prairie, and Sage Creek Basins are considered favorable for sandstone-type uranium deposits. Evidence present includes suitable source rocks such as rhyolitic flow breccia, laharic deposits, or strongly welded tuffs; permeable sediments, including most sandstones and conglomerates, providing they do not contain devitrified glass; suitable reductants such as lignite, pyrite, or low-Eh geothermal water; and uranium occurrences.

Wodzicki, A.; Krason, J.

1981-06-01

332

Idaho Landscapes & Gardens  

NSDL National Science Digital Library

From tomatoes to pesky (and helpful) insects, the Idaho Landscapes & Gardens website has information for a wide range of interested parties, and not just persons who live in Idaho either. Created and maintained by the University of Idaho's Extension program, the site is divided into areas like "Gardening Basics", "Lawn & Turf", "Herbaceous Ornamentals", and "Wildlife in the Garden". For those with a budding green thumb, the "Gardening Basics" section offers some practical information on gardening equipment, composting, soil preparation, and irrigation methods. More advanced gardeners may wish to skip over to the "Plant Your Landscape" area. Here they will find resources on how to create a general landscape plan and how to install different elements of the basic plan. The site is rounded out by the "Seasonal Topics" area, which contains up-to-the minute details on summer pruning and fall lawn care.

333

ROCK CREEK, IDAHO WATER QUALITY STATUS REPORT, 1970-1984  

EPA Science Inventory

The study was designed to determine the characteristics and amounts of industrial and municipal wastes discharged to Rock Creek, Idaho (17040212) and subsequently into the Snake River and to evaluate the effects of these wastes on the biota and water quality of Rock Creek. Indus...

334

Idaho Steelhead Monitoring and Evaluation Studies : Annual Progress Report 2007.  

SciTech Connect

The goal of Idaho Steelhead Monitoring and Evaluation Studies is to collect monitoring data to evaluate wild and natural steelhead populations in the Clearwater and Salmon river drainages. During 2007, intensive population data were collected in Fish Creek (Lochsa River tributary) and Rapid River (Little Salmon River tributary); extensive data were collected in other selected spawning tributaries. Weirs were operated in Fish Creek and Rapid River to estimate adult escapement and to collect samples for age determination and genetic analysis. Snorkel surveys were conducted in Fish Creek, Rapid River, and Boulder Creek (Little Salmon River tributary) to estimate parr density. Screw traps were operated in Fish Creek, Rapid River, Secesh River, and Big Creek to estimate juvenile emigrant abundance, to tag fish for survival estimation, and to collect samples for age determination and genetic analysis. The estimated wild adult steelhead escapement in Fish Creek was 81 fish and in Rapid River was 32 fish. We estimate that juvenile emigration was 24,127 fish from Fish Creek; 5,632 fish from Rapid River; and 43,674 fish from Big Creek. The Secesh trap was pulled for an extended period due to wildfires, so we did not estimate emigrant abundance for that location. In cooperation with Idaho Supplementation Studies, trap tenders PIT tagged 25,618 steelhead juveniles at 18 screw trap sites in the Clearwater and Salmon river drainages. To estimate age composition, 143 adult steelhead and 5,082 juvenile steelhead scale samples were collected. At the time of this report, 114 adult and 1,642 juvenile samples have been aged. Project personnel collected genetic samples from 122 adults and 839 juveniles. We sent 678 genetic samples to the IDFG Eagle Fish Genetics Laboratory for analysis. Water temperature was recorded at 37 locations in the Clearwater and Salmon river drainages.

Copeland, Timothy; Putnam, Scott

2008-12-01

335

Rapid River Hatchery - Spring Chinook, Final Report  

SciTech Connect

This report presents the findings of the independent audit of the Rapid River Hatchery (Spring Chinook). The hatchery is located in the lower Snake River basin near Riggins Idaho. The hatchery is used for adult collection, egg incubation, and rearing of spring chinook. The audit was conducted in April 1996 as part of a two-year effort that will include 67 hatcheries and satellite facilities located on the Columbia and Snake River system in Idaho, Oregon, and Washington. The hatchery operating agencies include the US Fish and Wildlife Service, Idaho Department of Fish and Game, Oregon Department of Fish and Wildlife, and Washington Department of Fish and Wildlife.

Watson, M.

1996-05-01

336

Idaho Explosives Detection System  

SciTech Connect

The Idaho Explosives Detection System (IEDS) was developed at the Idaho National Laboratory (INL) to respond to threats imposed by delivery trucks carrying explosives into military bases. A full-scale prototype system has been built and is currently undergoing testing. The system consists of two racks, one on each side of a subject vehicle. Each rack includes a neutron generator and an array of NaI detectors. The two neutron generators are pulsed and synchronized. A laptop computer controls the entire system. The control software is easily operable by minimally trained staff. The system was developed to detect explosives in a medium size truck within a 5-minute measurement time. System performance was successfully demonstrated with explosives at the INL in June 2004 and at Andrews Air Force Base in July 2004.

Edward L. Reber; J. Keith Jewell; Larry G. Blackwood; Andrew J. Edwards; Kenneth W. Rohde; Edward H. Seabury

2004-10-01

337

Characterizing aquifer hydrogeology and anthropogenic chemical influences on groundwater near the Idaho Chemical Processing Plant, Idaho National Engineering Laboratory, Idaho  

SciTech Connect

A conceptual model of the Eastern Snake River Plain aquifer in the vicinity of monitoring well USGS-44, downgradient of the Idaho Chemical Processing Plant (ICPP) on the Idaho National Engineering Laboratory (INEL), was developed by synthesis and comparison of previous work (40 years) and new investigations into local natural hydrogeological conditions and anthropogenic influences. Quantitative tests of the model, and other recommendations are suggested. The ICPP recovered fissionable uranium from spent nuclear fuel rods and disposed of waste fluids by release to the regional aquifer and lithosphere. Environmental impacts were assessed by a monitoring well network. The conceptual model identifies multiple, highly variable, interacting, and transient components, including INEL facilities multiple operations and liquid waste handling, systems; the anisotropic, in homogeneous aquifer; the network of monitoring and production wells, and the intermittent flow of the Big Lost River. Pre anthropogenic natural conditions and early records of anthropogenic activities were sparsely or unreliably documented making reconstruction of natural conditions or early hydrologic impacts impossible or very broad characterizations.

Fromm, J.M.

1995-12-31

338

Idaho Higher Education: 1994 Fact Book.  

ERIC Educational Resources Information Center

This fact book presents information about Idaho's public four-year college, Lewis-Clark State College, and the three universities: Boise State University, Idaho State University, and the University of Idaho. The book also provides selected data on vocational education and Idaho's two community colleges: North Idaho College and the College of…

Idaho State Board of Education, Boise.

339

Local and Landscape-Scale Influences on the Occurrence and Density of Dicamptodon aterrimus, the Idaho Giant Salamander  

E-print Network

Local and Landscape-Scale Influences on the Occurrence and Density of Dicamptodon aterrimus to identify an effective spatial scale to manage the Idaho Giant Salamander, Dicamptodon aterrimus. We used. aterrimus occurrence and density in 40 streams distributed throughout the Lochsa River basin, Idaho. Local

Lowe, Winsor H.

340

IMPACTS OF GEOTHERMAL WATERS ON SELECTED STREAMS IN SOUTHERN IDAHO, 1984-1985  

EPA Science Inventory

Four drainage areas were studies in Southern Idaho (17040212, 17040213) to determine the impact of geothermal discharges on area streams. Areas studied included Big Wood River near Ketchum, Mud Creek near Buhl, Salmon Falls Creek near Castleford, and the Snake River from Twin Fa...

341

ANTELOPE-PINE CREEK AREA, IDAHO - WATER QUALITY STATUS REPORT. 1988-1989  

EPA Science Inventory

The Antelope-Pine Creek study area consists of the drainage which flows into the portion of the South Fork, Snake River between Heise and the Palisades Dam, Idaho (17040104). The South Fork of the Snake River was identified in the Agricultural Nonpoint Pollution Abatement Plan a...

342

40 CFR 81.313 - Idaho.  

...Washington-Northern Idaho Interstate AQCR 62 (Idaho Portion): Silver Valley (Shoshone County) X Remainder of AQCR 62 (Idaho... 11/15/90 Nonattainment 11/15/90 Moderate. Silver Valley (Shoshone County), excluding the Pinehurst...

2014-07-01

343

THE UNIVERSITY OF IDAHO, MOSCOW, IDAHO The University  

E-print Network

. He has been very helpful and understanding in student affairs. Dr. Theophilus has also gained with furthering higher education at the University of Idaho. He was instrumental in obtaining funds for the new in supporting higher education at the University of Idaho. 2\\ #12;22 Board of Regents L.-/t to rigbt

O'Laughlin, Jay

344

Water resources in a changing climate: An Idaho research initiative  

NASA Astrophysics Data System (ADS)

A new initiative in Idaho funded by NSF EPSCoR will build state-wide research infrastructure to address how changes in future climatic conditions may impact water resources, as well as ecological and human systems. This project is supporting complementary field studies on a highly managed river system (Snake River Plain) and a relatively unmanaged system (Salmon River Basin). The project aims to fill a critical niche in hydrology by understanding the connection between surface flow and groundwater. Research capacity is being developed in three main areas: 1) hydroclimatology to improve modeling of water resources affected by climate change, 2) integration of hydrology and economic modeling in the Snake River basin, and 3) highly interdisciplinary research in the Salmon River basin involving climate, water, fire, insect infestations, geomorphology, and stream health. The project will also enhance outreach and educational experiences in climate change and water resources. A description of the new initiative and the activities associated with it will be given.

Walden, V. P.

2009-12-01

345

Effects of Military Training Activities on Shrub-steppe Raptors in Southwestern Idaho, USA  

Microsoft Academic Search

Buteo regalis  ), northern harriers (Circus cyaneus), burrowing owls (Athene cunicularia), and short-eared owls (Asio flammeus) inside and outside a military training site in the Snake River Birds of Prey National Conservation Area, southwestern Idaho.\\u000a The Orchard Training Area is used primarily for armored vehicle training and artillery firing by the Idaho Army National Guard.\\u000a Relative abundance of nesting pairs inside

ROBERT N. LEHMAN; KAREN STEENHOF; MICHAEL N. KOCHERT; LESLIE B. CARPENTER

1999-01-01

346

Salmon River Habitat Enhancement, 1990 Annual Report.  

SciTech Connect

The annual report contains three individual subproject sections detailing tribal fisheries work completed during the summer and fall of 1990. Subproject I contains summaries of evaluation/monitoring efforts associated with the Bear Valley Creek, Idaho enhancement project. Subproject II contains an evaluation of the Yankee Fork of the Salmon River habitat enhancement project. Subproject III concerns the East Fork of the Salmon River, Idaho.

Rowe, Mike

1991-12-01

347

Lower Snake River Subbasin Management Plan WDFW March 2004 1  

E-print Network

Lower Snake River Subbasin Management Plan WDFW ­ March 2004 1 Lower Snake River Subbasin Management Plan Introduction The Lower Snake River subbasin is located in Whitman, Garfield, Columbia, Asotin. Extending from Idaho to the east and the Columbia River to the west, this subbasin is the third largest

348

Distribution of Benthic Invertebrates in the Lost Streams of Idaho  

Microsoft Academic Search

The Lost Streams of Idaho (Big Lost and Little Lost rivers; Birch, Medicine Lodge, Beaver and Camas creeks) constitute a unique set of isolated lotic environments. The streams are all similar in size (discharge 1.5-2.5 m3\\/sec) except for Camas Creek which is 3-4 times larger. Likewise, chemical conditions are similar in all streams except Camas Creek which has generally lower

A. ANDREWS; G. WAYNE MINSHALL

349

Strontium Distribution Coefficients of Basalt and Sediment Infill Samples from the Idaho National Engineering and Environmental Laboratory, Idaho  

SciTech Connect

The U.S. Geological Survey and Idaho State University, in cooperation with the U.S. Department of Energy, are conducting a study to determine and evaluate strontium distribution coefficients (Kds) of subsurface materials at the Idaho National Engineering and Environmental Laboratory (INEEL). The purpose of this study is to aid in assessing the variability of strontium Kds at the INEEL as part of an ongoing investigation of chemical transport of strontium-90 in the Snake River Plain aquifer. Batch experimental techniques were used to determine Kds of six basalt core samples, five samples of sediment infill of vesicles and fractures, and six standard material samples. Analyses of data from these experiments indicate that the Kds of the sediment infill samples are significantly larger than those of the basalt samples. Quantification of such information is essential of furthering the understanding of transport processes of strontium-90 in the Snake River Plain aquifer and in similar environments.

M. N. Pace; R. C. Bartholomay (USGS); J. J. Rosentreter (ISU)

1999-07-01

350

Budget and sources of suspended sediment transported in the St. Lawrence River, Canada  

NASA Astrophysics Data System (ADS)

A mass balance budget of the suspended sediment in the St. Lawrence River was established for the sector stretching from Cornwall, Ontario, to Quebec City, Quebec, for the period 1989-1993. The approach consisted of analysing the amount of sediment contributed by the different tributaries, on a watershed-by-watershed basis, through sediment concentration-discharge models incorporating more than 4000 data points collected since 1983. Lake Ontario contributes less than 3% of the particulate load at Quebec City, while St. Lawrence tributaries on the south and north shores contribute 19% and 13%, respectively, of the sediment load. Our findings indicate that nearly 65% of the suspended sediments come from erosion of the bed and banks of the St. Lawrence River. This finding is broadly supported by numerous geomorphological and sedimentological observations and is consistent with the geological history of the river and the structures built on its banks in recent decades. Upstream-downstream mass balance studies conducted on individual river sectors indicate that the sources of erosion are located mainly in the Beauharnois Canal region, between Montreal and Les Grèves, and further downstream, between the outlet of Lake Saint-Pierre and Portneuf.

Rondeau, Bernard; Cossa, D.; Gagnon, P.; Bilodeau, L.

2000-01-01

351

Development of the western Idaho ultramafic belt  

SciTech Connect

The 164-mile-long western Idaho ultramafic belt contains small bodies of dunite, serpentinite, metaharzburgite, and clinopyroxenite that mainly lie near the suture zone joining the Blue Mountains island arc accreted terrane and the pre-Cretaceous continental crust. The main ultramafic areas are: (1) in the Cuddy Mountain-Sturgill Peak region, where sheared serpentinite occurs along a high-angle reverse fault zone between two subterranes of the Blue Mountain terrane, (2) in the New Meadows tectonic block where dunites, harzburgites, and chromitites occur with metamorphosed cherts, greywackes, and exhalative rocks, (3) near Riggins where serpentinite occurs in metasedimentary rocks of the Mesozoic-age Riggins Group, (4) in the South Fork Clearwater River region where anthophyllite metaharzburgites and Cr-rich clinopyroxenites are enclosed within gneissic equivalents of the Riggins Group and in Cretaceous-age felsic plutonic rocks, and (5) in the Lowell-Kamiah-Dworshak Reservoir region where additional anthophyllite metaharzburgites occur in Proterozoic-age metasedimentary rocks. After the ultramafic rocks were formed, plate convergence led to their obduction onto the Mesozoic margin of North America. Compression accompanying the docking of the Blue Mountains island arc and then the emplacement of the Idaho batholith metamorphosed most of the ultramafic bodies to the greenschist and amphibolite facies and remobilized them along faults to their present locations within host rocks of widely varying ages.

Bonnichsen, B. (Univ. of Idaho, Moscow, ID (United States). Idaho Geological Survey); Godchaux, M.M. (Mount Holyoke Coll., South Hadley, MA (United States). Dept. of Geology)

1993-04-01

352

SAWTOOTH WILDERNESS, IDAHO.  

USGS Publications Warehouse

The Sawtooth Wilderness in Idaho consists of the former Sawtooth Primitive Area and certain contiguous tracts of land. A survey of the mineral-resource potential of the entire area disclosed hydrothermally altered and mineralized rocks at several localities, some of which have been prospected to a limited extent but none of which have produced significant quantities of ore. Sediment samples from many of the streams that drain the wilderness contained anomalous quantities of metals. At some sample sites the source of the anomalous concentrations of metals may be related to known mineralized out-crops but the source at many of the sites is unknown. The significant geochemical data, the extent of altered and mineralized rocks, and the proximity to other productive mineral districts in similar geologic environs indicate that substantial parts of the wilderness have probable mineral-resource potential. A placer deposit, in the northern part of the wilderness, has substantiated potential for rare-earth elements; an area in the southern part of the wilderness has substantiated potential for precious metals; and several mines in the wilderness have demonstrated resources of base and precious metals. The geologic setting precludes the presence of fossil fuels.

Kiilsgaard, Thor H.; Coffman, Joseph S.

1984-01-01

353

Water information bulletin No. 30 geothermal investigations in Idaho  

SciTech Connect

There are 899 thermal water occurrences known in Idaho, including 258 springs and 641 wells having temperatures ranging from 20 to 93/sup 0/C. Fifty-one cities or towns in Idaho containing 30% of the state's population are within 5 km of known geothermal springs or wells. These include several of Idaho's major cities such as Lewiston, Caldwell, Nampa, Boise, Twin Falls, Pocatello, and Idaho Falls. Fourteen sites appear to have subsurface temperatures of 140/sup 0/C or higher according to the several chemical geothermometers applied to thermal water discharges. These include Weiser, Big Creek, White Licks, Vulcan, Roystone, Bonneville, Crane Creek, Cove Creek, Indian Creek, and Deer Creek hot springs, and Raft River, Preston, and Magic Reservoir areas. These sites could be industrial sites, but several are in remote areas away from major transportation and, therefore, would probably be best utilized for electrical power generation using the binary cycle or Magma Max process. Present uses range from space heating to power generation. Six areas are known where commercial greenhouse operations are conducted for growing cut and potted flowers and vegetables. Space heating is substantial in only two places (Boise and Ketchum) although numerous individuals scattered throughout the state make use of thermal water for space heating and private swimming facilities. There are 22 operating resorts using thermal water and two commercial warm-water fish-rearing operations.

Mitchell, J.C.; Johnson, L.L.; Anderson, J.E.; Spencer, S.G.; Sullivan, J.F.

1980-06-01

354

WATER QUALITY STATUS REPORT, OWYHEE RIVER, OWYHEE COUNTY, ID, 1976-1977.  

EPA Science Inventory

A water quality survey of the Owyhee River in SW Idaho (17050104, 17050105, 17050106) was conducted from August 1976 to April 1977 by the State of Idaho, Department of Health and Welfare, Division of Environment. The survey was conducted to help determine if the Owyhee River in ...

355

Secondary Deformation Within the Huckleberry Ridge Tuff and Subjacent Pliocene Units Near the Teton Dam: Road Log to the Regional Geology of the Eastern Margin of the Snake River Plain, Idaho  

Microsoft Academic Search

Detailed geologic mapping has revealed that a 20 km by 20 km area between the south flank of Big Bend Ridge and the Teton River, has been involved in gravity sliding and secondary flow. A sheet consisting of 130 m of 2 Ma Huckleberry Ridge Tuff and at least 30 m of underlying alluvial gravel, basalts, and tuffaceous lacustrine sediments

Glenn F. Embree; Roger D. Hoggan

356

33 CFR 117.385 - Snake River.  

Code of Federal Regulations, 2010 CFR

...Navigable Waters 1 2010-07-01 2010-07-01 false Snake River. 117.385 Section 117.385 Navigation and Navigable...REGULATIONS Specific Requirements Idaho § 117.385 Snake River. The drawspan of the U.S. 12 bridge, mile...

2010-07-01

357

33 CFR 117.385 - Snake River.  

Code of Federal Regulations, 2011 CFR

...Navigable Waters 1 2011-07-01 2011-07-01 false Snake River. 117.385 Section 117.385 Navigation and Navigable...REGULATIONS Specific Requirements Idaho § 117.385 Snake River. The drawspan of the U.S. 12 bridge, mile...

2011-07-01

358

Conditions during syntectonic vein formation in the footwall of the Absaroka thrust fault of the Idaho-Wyoming-Utah fold and thrust belt  

E-print Network

to analyze vein shapes. GEOLOGY Regional Geology The fold and thrust belt of western Wyoming and southeastern Idaho forms an arcuate belt approximately 300 km long and 100 km wide, extending from the Snake River Plain southward mto Utah. /he belt... to analyze vein shapes. GEOLOGY Regional Geology The fold and thrust belt of western Wyoming and southeastern Idaho forms an arcuate belt approximately 300 km long and 100 km wide, extending from the Snake River Plain southward mto Utah. /he belt...

Lambert, George Randall

2012-06-07

359

Paleozoic carbonate buildup (reef) inventory, central and southeastern Idaho  

SciTech Connect

Knowledge of central and southeastern Idaho's Paleozoic rocks to date suggest that three styles of buildup (reef) complexes occur in Late Devonian, Mississippian, and Pennsylvanian-Permian time. The Late Devonian Jefferson Formation has stromatoporoid and coral (both rugosan and tabulate) organisms effecting a buildup in the Grandview Canyon vicinity; Early Mississippian Waulsortian-type mud mounds occur in the Lodgepole formation of southeastern Idaho; there are Late Mississippian Waulsortian-type mounds in the Surrett Canyon Formation of the Lost River Range; and cyclic Pennsylvanian-Permian algal and hydrozoan buildups occur in the Juniper gulch Member of the Snaky Canyon Formation in the Arco Hills and Lemhi Range. Late Devonian (Frasnian) carbonates of the Jefferson formation show buildup development on deep ramp sediments.

Isaacson, P.E.

1987-08-01

360

Prehistoric Rock Structures of the Idaho National Laboratory  

SciTech Connect

Over the past 13,500 years, human populations have lived in and productively utilized the natural resources offered by the cold desert environment of the northeastern Snake River Plain in eastern Idaho. Within an overall framework of hunting and gathering, groups relied on an intimate familiarity with the natural world and developed a variety of technologies to extract the resources that they needed to survive. Useful items were abundant and found everywhere on the landscape. Even the basaltic terrain and the rocks, themselves, were put to productive use. This paper presents a preliminary classification scheme for rock structures built on the Idaho National Laboratory landscape by prehistoric aboriginal populations, including discussions of the overall architecture of the structures, associated artifact assemblages, and topographic placement. Adopting an ecological perspective, the paper concludes with a discussion of the possible functions of these unique resources for the desert populations that once called the INL home.

Brenda R Pace

2007-04-01

361

Assessment of the Geothermal System Near Stanley, Idaho  

SciTech Connect

The City of Stanley, Idaho (population 63) is situated in the Salmon River valley of the central Idaho highlands. Due to its location and elevation (6270 feet amsl) it is one of the coldest locales in the continental U.S., on average experiencing frost 290 days of the year as well as 60 days of below zero (oF) temperatures. Because of high snowfall (76 inches on average) and the fact that it is at the terminus of its rural grid, the city also frequently endures extended power outages during the winter. To evaluate its options for reducing heating costs and possible local power generation, the city obtained a rural development grant from the USDA and commissioned a feasibility study through author Roy Mink to determine whether a comprehensive site characterization and/or test drilling program was warranted. Geoscience students and faculty at Idaho State University (ISU), together with scientists from the Idaho Geological Survey (IGS) and Idaho National Laboratory (INL) conducted three field data collection campaigns between June, 2011 and November, 2012 with the assistance of author Beckwith who arranged for food, lodging and local property access throughout the field campaigns. Some of the information collected by ISU and the IGS were compiled by author Mink and Boise State University in a series of progress reports (Makovsky et al., 2011a, b, c, d). This communication summarizes all of the data collected by ISU including data that were compiled as part of the IGS’s effort for the National Geothermal Data System’s (NGDS) data compilation project funded by the Department of Energy and coordinated by the Arizona Geological Survey.

Trent Armstrong; John Welhan; Mike McCurry

2012-06-01

362

Columbia River Salmon and Steelhead Returns 1999 -2008  

E-print Network

Columbia River Salmon and Steelhead Returns 1999 - 2008 Peter Hassemer Idaho Department of Fish Upper Columbia Summer Chinook Salmon Coho Salmon Shad Columbia River Salmon and Steelhead Returns 1999;Sockeye Salmon #12;Sockeye Salmon #12;Spring Chinook Salmon (Includes Snake River Summers) #12;Spring

363

COLUMBIA/SNAKE RIVER TEMPERATURE TOTAL MAXIMUM DAILY LOAD (TMDL)  

EPA Science Inventory

EPA and the States of Idaho, Oregon and Washington are working in coordination with the Columbia River Tribes to establish a temperature TMDL for the mainstems of the Columbia and Snake Rivers. Both rivers are on state 303(d) lists of impaired waters for exceedances of water qua...

364

Investigating drought using extreme climatic indices over Idaho, USA  

NASA Astrophysics Data System (ADS)

To investigate consequences of climate variability and change, twenty-seven climatic indices of temperature and precipitation for Idaho, USA were computed, especially focusing on growing seasons (May through August). Mean temperature and average of maximum of maximum temperature, yearly minimum value of Self Calibrated Palmer Index (sc-PDSI) and Standard Precipitation Index (SPI) for 1, 3, 6 and 12 month time scales were also used to identify spatial and temporal distributions of climatic variability to be utilized in water management decisions. The analyses were conducted for 57 meteorological stations, during the period from 1962 to 2007, characterized by a long-term and high-quality dataset. Preliminary results indicate that global warming likely occurs over Idaho in the sense that declining trends in precipitation amount and frequency have been presented over most of the stations. Increasing trends in minimum of minimum temperature have been seen at the 56 stations and statistical significance of the trends were shown at the 33 stations out of them. Similarly, increasing trends in maximum of maximum temperature at the 48 stations have been found, and 25 stations out of them have significant trends. Consequently, frost and ice days dwindle as growing season length, tropical nights and summer days increase. Annual precipitation shows decreasing trends in 39 stations which 33 percent of them are significant. Generally, precipitation amount and frequency considerably dwindle in southern Idaho, while these indices increase in northern Idaho. Growing season precipitation also declines considerably, particularly in Snake River basin. Results of monthly and annual average of both SPI and sc-PDSI reveal considerable number of negative trends (approaching dry condition). SPI 12 month time scale and sc-PDSI indicate similar pattern. Furthermore, their results are consistent with drought reports published by Idaho Department of Water Resources. Minimum sc-PDSI has negative trends in 46 stations, and 16 and 3 stations show negative and positive significant trends, relatively. Minimum SPI 1, 3, 6 and 12 month time scales indicate 36, 40, 43 and 42 negative trends and 6, 10, 14 and 16 stations out of them have significant trends, respectively. Results of extreme climatic and seasonal indices are completely consistent with that of PDSI and SPI. As such, findings highlight that water shortage in the southern part of Idaho, especially in Snake River basin, likely occurs in the near future possibly due to climate change.

Sohrabi, M.; Ryu, J.

2011-12-01

365

Sediment sources and yields within the Idaho batholith in a changing climate  

Microsoft Academic Search

Mountain basins of the Idaho batholith are characterized by steep terrain, highly erodible granitic soils, wildfire, and rain-on-snow and summer convective storms that collectively produce naturally high sediment yields. This sediment is essential to habitat formation for aquatic organisms, but also decreases reservoir capacity and increases flood risk near the Lower Snake River dams. Climate change and land management activities

J. Goode; C. Luce; J. M. Buffington

2009-01-01

366

BEDROCK CREEK, NEZ PERCE AND CLEARWATER COUNTIES, IDAHO - WATER QUALITY STATUS REPORT, 1985  

EPA Science Inventory

A water quality monitoring study was conducted on Bedrock Creek (17060306), a third order tributary to the Clearwater River in north-central Idaho. Objectives of the study were to assess water quality of the stream and its major tributary; to document the effects of storm runoff...

367

Herbivorous and parasitic insect guilds associated with Great Basin wild rye (Elymus cinereus) in southern Idaho  

Microsoft Academic Search

Insects inhabiting Great Basin wild rye (elymus cinereus Scribn. and Merr.) were surveyed at two sites on the Snake River Plain in southern Idaho during 1982 and 1983. Forty-six species of phytophagous insects were observed. In addition, eight parasitoid species were reared from insect hosts in the plant culms and identified. Life stage, abundance, plant part utilized, and study site

B. A. Youtie; M. Stafford; J. B. Johnson

1987-01-01

368

WATER QUALITY DATA REPORT, LUCKY PEAK RESERVOIR, IDAHO. JUNE 1965 - JULY 1967  

EPA Science Inventory

In a cooperative program with the U.S. Army Corps of Engineers, Walla Walla District, a water quality study was conducted on Lucky Peak Reservoir, Idaho (17050112), from June 1965 to July 1967. Luck Peak Reservoir is located on the Boise River 10 miles east of Boise, ID and just...

369

DEEP CREEK AND MUD CREEK, TWIN FALLS, IDAHO. WATER QUALITY STATUS REPORT, 1986  

EPA Science Inventory

Deep Creek and Mud Creek are located in Twin Falls County near Buhl, Idaho (17040212). From April through October, these creeks convey irrigation drainage water from the western part of the Twin Falls irrigation tract to the Snake River. During 1986, water quality surveys were ...

370

SOLE SOURCE AQUIFERS AND SOURCE AREAS IN WASHINGTON, OREGON, AND IDAHO  

EPA Science Inventory

The map shows sole source aquifers and their source areas in Washington, Oregon, and Idaho. Aquifers that have been designated are shown along with those that have been petitioned for designation. County outlines, and the Columbia river system are also shown. The aquifers.tar.g...

371

COEUR D'ALENE BASIN, IDAHO - EPA WATER QUALITY MONITORING, 1972 TO 1986  

EPA Science Inventory

The Region 10 Office of USEPA has conducted chemical and biological monitoring during low-flow conditions from 1972 to 1986 along the South Fork Coeur dAlene River in northern Idaho (17010303), a stream with a long history of severe metals pollution from mining activities. Durin...

372

ID State Profile. Idaho: Idaho Standards Achievement Test (ISAT)  

ERIC Educational Resources Information Center

This paper provides information about Idaho Standards Achievement Test, a comprehensive standards-based test. The purpose of the test is to: (1) Determine prospective high school graduates' mastery of the state curriculum, grade 10; (2) Encourage districts and schools to identify and serve students at risk of academic failure; (3) Provide data to…

Center on Education Policy, 2010

2010-01-01

373

Hydrologic conditions at the Idaho National Engineering Laboratory, Idaho, emphasis; 1974-1978  

USGS Publications Warehouse

Aqueous chemical and radioactive wastes have been discharged to shallow ponds and to shallow or deep wells on the Idaho National Engineering Laboratory (INEL) since 1952 and has affected the quality of the ground water in the underlying Snake River Plain aquifer. Ongoing studies conducted from 1974 through 1978 have shown the perpetuation of a perched ground-water zone in the basalt underlying the waste disposal ponds at the INEL 's Test Reactor Area and of several waste plumes in the regional aquifer created by deep well disposal at the Idaho Chemical Processing Plant (ICPP). The perched zone contains tritium, chromium-51, cobalt-60, strontium-90, and several nonradioactive chemicals. Tritium has formed the largest waste plume south of the ICPP, and accounts for 95 percent of the total radioacticity disposed of through the ICPP disposal well. Waste plumes with similar configurations and flowpaths contain sodium, chloride, and nitrate. Strontium-90, iodine-129, and cesium-137 are also discharged through the well but they are sorbed from solution as they move through the aquifer or are discharged in very small quantities. Strontium-90 and iodine-129 have formed small waste plumes and cesium-137 is not detectable in ground-water samples. Radionuclide plume size and concentrations therein are controlled by aquifer flow conditions, the quantity discharged, radioactive decay, sorption, dilution by dispersion, and perhaps other chemical reactions. Chemical wastes are subject to the same processes except for radioactive decay. (USGS)

Barraclough, Jack T.; Lewis, Barney D.; Jensen, Rodger G.

1981-01-01

374

The Influence of ENSO and PDO on Idaho's Snowpack  

NASA Astrophysics Data System (ADS)

Idaho's snowpacks build up in the winter and slowly release water into rivers and lakes throughout the spring and summer providing critical seasonal to multi-annual water storage. Initial results indicate El-Niño-Southern- Oscillation (ENSO) and the Pacific Decadal Oscillation (PDO) influence the quantity and timing of snowmelt in all Idaho watersheds but the magnitude of these effects vary regionally. Twenty-five plus years (~1980-2006) of snow water equivalent (SWE) data from SNOTEL data from 160 sites within the Idaho watershed are categorized as occurring during a combined phase of one of three ENSO states (El Niño, neutral or La Niña, states defined using Nino-3.4 defined years) and one of three PDO states (positive, neutral or negative, states defined using data from JIASO, University of Washington) for a total of nine possible combinations. We evaluated the total SWE received in the snowpack and the timing for final melt of that snowpack with respect to ENSO and PDO conditions. ENSO and PDO produce major regional timing fluctuations in final snowmelt dates, as well as significantly low (high) flow events based upon decreased (increased) overall snowfall accumulation. We are able to separate Idaho's watershed into five distinct climatic regions for SWE accumulation and snowmelt timing. Each region reacts differently to the combined ENSO/PDO induced climatic variability as shown by distinct dates of final snowmelt and variability in snow accumulations. This variability may indicate dissimilar moisture sources and weather patterns for each region (e.g. Pacific- dominated western regions vs. `monsoonally'-influenced southeastern regions). Since depth of snowpack and timing of snowmelt influences the timing and magnitude of low (high) flow events and drought conditions in forest canopies, variations in snowmelt have implications for Idaho's water supply, hydroelectric generation, wildfire conditions, native fish populations and economy. Future work will address the possible role of the Atlantic Multidecadal Oscillation (AMO) in controlling Idaho snowpacks and relationships between the timing of snowmelt, peak flows, and past fire activity in Idaho forests.

Kunkel, M. L.; Pierce, J. L.

2006-12-01

375

Contaminant Monitoring Strategy for Henrys Lake, Idaho  

SciTech Connect

Henrys Lake, located in southeastern Idaho, is a large, shallow lake (6,600 acres, {approx} 17.1 feet maximum depth) located at 6,472 feet elevation in Fremont Co., Idaho at the headwaters of the Henrys Fork of the Snake River. The upper watershed is comprised of high mountains of the Targhee National Forest and the lakeshore is surrounded by extensive flats and wetlands, which are mostly privately owned. The lake has been dammed since 1922, and the upper 12 feet of the lake waters are allocated for downriver use. Henrys Lake is a naturally productive lake supporting a nationally recognized ''Blue Ribbon'' trout fishery. There is concern that increasing housing development and cattle grazing may accelerate eutrophication and result in winter and early spring fish kills. There has not been a recent thorough assessment of lake water quality. However, the Department of Environmental Quality (DEQ) is currently conducting a study of water quality on Henrys Lake and tributary streams. Septic systems and lawn runoff from housing developments on the north, west, and southwest shores could potentially contribute to the nutrient enrichment of the lake. Many houses are on steep hillsides where runoff from lawns, driveways, etc. drain into wetland flats along the lake or directly into the lake. In addition, seepage from septic systems (drainfields) drain directly into the wetlands enter groundwater areas that seep into the lake. Cattle grazing along the lake margin, riparian areas, and uplands is likely accelerating erosion and nutrient enrichment. Also, cattle grazing along riparian areas likely adds to nutrient enrichment of the lake through subsurface flow and direct runoff. Stream bank and lakeshore erosion may also accelerate eutrophication by increasing the sedimentation of the lake. Approximately nine streams feed the lake (see map), but flows are often severely reduced or completely eliminated due to irrigation diversion. In addition, subsurface flows can occur as a result of severe cattle grazing along riparian areas and deltas. Groundwater and springs also feed the lake, and are likely critical for oxygen supply during winter stratification. During the winter of 1991, Henrys Lake experienced low dissolved oxygen levels resulting in large fish kills. It is thought that thick ice cover combined with an increase in nutrient loads created conditions resulting in poor water quality. The Idaho Department of Health and Welfare, DEQ is currently conducting a study to determine the water quality of Henrys Lake, the sources contributing to its deterioration, and potential remedial actions to correct problem areas.

John S. Irving; R. P. Breckenridge

1992-12-01

376

Dubois Quadrangle, Idaho and Montana  

Microsoft Academic Search

Within the Dubois Quadrangle (Idaho and Montana), environments favorable for uranium deposits, based on National Uranium Resource Evaluation criteria, occur in the McGowan Creek Formation and within some Tertiary sedimentary basins. The Mississippian McGowan Creek Formation consists of uraniferous, black, siliceous mudstone and chert with minor porous sedimentary channels. In the southern Beaverhead Mountains it has been fractured by a

A. Wodzicki; J. Krason

1981-01-01

377

Estimates of Late Cenozoic extension, east-central Idaho  

SciTech Connect

Late Cenozoic normal faults define the southwest flanks of the Lost River, Lemhi and Beaverhead Ranges in east-central Idaho. Cross sections and structural analysis suggest that throws along the central parts of the Lost River and Lemhi faults range from about 2 to 5 km. If the Beaverhead fault has a similar throw, then Miocene to Recent extension of east-central Idaho ranged 5 to 15%. However, three additional Late Cenozoic normal faults (the Hawley Mountain, Goldburg and Barney faults) bound a NW-trending horst between the Lost River and Lemhi Ranges in the Hawley Mountain and Donkey Hills area. The horst-bounding normal faults are inferred to have formed during Late Cenozoic time because: (1) the faults parallel the NW to NNW strike of Late Cenozoic normal faults in the region, (2) scattered Quaternary fault scarps coincide with the Barney fault, (3) steep topographic fronts define parts of the Goldburg and Hawley Mountain faults, (4) the Hawley Mountain fault displaces two Eocene normal faults, and (5) gravity lows are present in the hanging walls of the Barney and Goldburg faults. Left-lateral separation across the inferred NE-dipping Barney fault suggests 2--3 km of throw, assuming dip-slip displacement. Throw across the Goldburg fault, which uplifts Oligocene basin-fill deposits in its footwall, is at least 500 m. Although two of the horst-bounding normal faults have not offset Quaternary surficial deposits, estimated slip across these faults have not offset Quaternary surficial deposits, estimated slip across these faults is similar to slip across the prominent range-front faults in the region. Therefore, estimated Late Cenozoic extension of east-central Idaho along a NE-SW cross section through the Hawley-Goldburg horst is about 10 to 20%.

Janecke, S.U.. (Utah State Univ., Logan, UT (United States). Dept. of Geology)

1993-04-01

378

Hemorrhagic gastritis in free-living rodents in Idaho.  

PubMed

Between February 1992 and March 1994, four species of rodent from the Snake River Birds of Prey Area near Boise, Idaho (USA) were necropsied. Hemorrhagic gastritis was observed in 16 of 131 Townsend's ground squirrels (Spermophilus townsendii), one of 11 Ord's kangaroo rats (Dipodomys ordii) and the one Great Basin pocket mouse (Perognathus parvus) evaluated. No lesions were observed in 14 white-footed deer mice (Peromyscus maniculatus). Tissue from one Townsend's ground squirrel was negative for Helicobacter sp.-like bacteria. PMID:9359067

Wilber, P G; Duszynski, D W; Van Horne, B

1996-10-01

379

Biological and Physical Inventory of the Streams within the Nez Perce Reservation; Juvenile Steelhead Survey and Factors that Affect Abundance in Selected Streams in the Lower Clearwater River Basin, Idaho, 1983-1984 Final Report.  

SciTech Connect

A biological and physical inventory of selected tributaries in the lower Clearwater River basin was conducted to collect information for the development of alternatives and recommendations for the enhancement of the anadromous fish resources in streams on the Nez Perce Reservation. Five streams within the Reservation were selected for study: Bedrock and Cottonwood Creeks were investigated over a two year period (1983 to 1984) and Big Canyon, Jacks and Mission Creeks were studied for one year (1983). Biological information was collected and analyzed on the density, biomass, production and outmigration of juvenile summer steelhead trout. Physical habitat information was collected on available instream cover, stream discharge, stream velocity, water temperature, bottom substrate, embeddedness and stream width and depth. The report focuses on the relationships between physical stream habitat and juvenile steelhead trout abundance.

Kucera, Paul A.; Johnson, David B. (Nez Perce Tribe, Lapwai, ID)

1986-08-01

380

Dillon quadrangle, Montana and Idaho  

Microsoft Academic Search

All geologic conditions in the Dillon quadrangle (Montana and Idaho) have been thoroughly examined, and, using National Uranium Resource Evaluation criteria, environments are favorable for uranium deposits along fractured zones of Precambrian Y metasediments, in the McGowan Creek Formation, and in some Tertiary sedimentary basins. A 9-m-wide quartz-bearing fractured zone in Precambrian Y quartzites near Gibbonsville contains 175 ppM uranium,

A. Wodzicki; J. Krason

1981-01-01

381

Purgeable organic compounds in ground water at the Idaho National Engineering Laboratory, Idaho, 1990 and 1991  

SciTech Connect

Ground-water samples from 76 wells and 1 hot spring at or near the Idaho National Engineering Laboratory were analyzed for 36 purgeable organic compounds during 1990--91. The samples were collected and analyzed as a continuation of a water-quality program initiated in 1987, and as part of studies conducted by the US Geological Survey. Most of the wells obtain water from the Snake River Plain aquifer. Samples were collected from these wells using dedicated or portable pumps. Water samples from 31 wells completed in the Snake River Plain aquifer contained detectable concentrations of at least 1 of 14 purgeable organic compounds. Most commonly detected were carbon tetrachloride, 1,1,1-trichloroethane, and trichloroethylene. The 5.0 micrograms per liter ({mu}g/L) or less; the concentrations of most compounds were less than the reporting level of 0.2 {mu}g/L. In addition, water from three wells contained detectable concentrations of one of two tentatively identified organic compounds, trimethylbenzene and isopropylbenzene.

Liszewski, M.J.; Mann, L.J.

1992-07-01

382

Purgeable organic compounds in ground water at the Idaho National Engineering Laboratory, Idaho, 1990 and 1991  

SciTech Connect

Ground-water samples from 76 wells and 1 hot spring at or near the Idaho National Engineering Laboratory were analyzed for 36 purgeable organic compounds during 1990--91. The samples were collected and analyzed as a continuation of a water-quality program initiated in 1987, and as part of studies conducted by the US Geological Survey. Most of the wells obtain water from the Snake River Plain aquifer. Samples were collected from these wells using dedicated or portable pumps. Water samples from 31 wells completed in the Snake River Plain aquifer contained detectable concentrations of at least 1 of 14 purgeable organic compounds. Most commonly detected were carbon tetrachloride, 1,1,1-trichloroethane, and trichloroethylene. The 5.0 micrograms per liter ([mu]g/L) or less; the concentrations of most compounds were less than the reporting level of 0.2 [mu]g/L. In addition, water from three wells contained detectable concentrations of one of two tentatively identified organic compounds, trimethylbenzene and isopropylbenzene.

Liszewski, M.J.; Mann, L.J.

1992-07-01

383

Teton Dam flood of June 1976, Rexburg quadrangle, Idaho  

USGS Publications Warehouse

The failure of the Teton Dam caused extreme flooding along the Teton River, Henrys Fork, and Snake River in southeastern Idaho on June 5-8, 1976. No flooding occurred downstream from American Falls Reservoir. The inundated areas and maximum water-surface elevations are shown in a series of 17 hydrologic atlases. The area covered by the atlases extends from Teton Dam downstream to American Falls Reservoir, a distance of 100 miles. The extent of flooding shown on the maps was obtained by field inspections and aerial photographs made during and immediately after the flood. There may be small isolated areas within the boundaries shown that were not flooded, but the identification on these sites was beyond the scope of the study. The elevation data shown are mean-sea-level elevations of high-water marks identified in the field. This particular map (in the 17-map series) shows conditions in the Rexburg quadrangle. (Woodard-USGS)

Harenberg, W.A.; Bigelow, B.B.

1976-01-01

384

SHIRAS MOOSE IN IDAHO: STATUS AND MANAGEMENT  

Microsoft Academic Search

Limited data indicate that Shiras moose (Alces alces shirasi) occurred in low numbers in Idaho throughout the 19th century. Harvest was allowed in Idaho during 1893-1898, after which seasons were closed. Shiras moose were fully protected in Idaho from 1899-1945. Moose populations increased during the 20 th century and harvest seasons resumed in 1946. Harvest has focused on mature males,

Dale E. Toweill; Gary Vecellio

2004-01-01

385

Idaho CERCLA Disposal Facility Complex Waste Acceptance Criteria  

SciTech Connect

The Idaho Comprehensive Environmental Response, Compensation, and Liability Act (CERCLA) Disposal Facility (ICDF) has been designed to accept CERCLA waste generated within the Idaho National Laboratory. Hazardous, mixed, low-level, and Toxic Substance Control Act waste will be accepted for disposal at the ICDF. The purpose of this document is to provide criteria for the quantities of radioactive and/or hazardous constituents allowable in waste streams designated for disposal at ICDF. This ICDF Complex Waste Acceptance Criteria is divided into four section: (1) ICDF Complex; (2) Landfill; (3) Evaporation Pond: and (4) Staging, Storage, Sizing, and Treatment Facility (SSSTF). The ICDF Complex section contains the compliance details, which are the same for all areas of the ICDF. Corresponding sections contain details specific to the landfill, evaporation pond, and the SSSTF. This document specifies chemical and radiological constituent acceptance criteria for waste that will be disposed of at ICDF. Compliance with the requirements of this document ensures protection of human health and the environment, including the Snake River Plain Aquifer. Waste placed in the ICDF landfill and evaporation pond must not cause groundwater in the Snake River Plain Aquifer to exceed maximum contaminant levels, a hazard index of 1, or 10-4 cumulative risk levels. The defined waste acceptance criteria concentrations are compared to the design inventory concentrations. The purpose of this comparison is to show that there is an acceptable uncertainty margin based on the actual constituent concentrations anticipated for disposal at the ICDF. Implementation of this Waste Acceptance Criteria document will ensure compliance with the Final Report of Decision for the Idaho Nuclear Technology and Engineering Center, Operable Unit 3-13. For waste to be received, it must meet the waste acceptance criteria for the specific disposal/treatment unit (on-Site or off-Site) for which it is destined.

W. Mahlon Heileson

2006-10-01

386

Concentrations of metals in mink and other mammals from Washington and Idaho  

USGS Publications Warehouse

From 1981 to 1983, concentrations dfof metals were determined in mink Mustela vison, muskrats Ondatra zibethica, and small mammals at one contaminated site in Idaho and at two less contaminated sites in Idaho and Washington. The highest concentrations of Pb and Cd occurred in samples from the Coeur d'Alene River system near or downstream from an extensive mining?smelting complex in northern Idaho. Maximum concentrations of Pb in the liver of a mink (22 :g g-1) and in pooled liver samples of both voles (Microtus spp., 5?8 :g g-1) and deer mice (Peromyscus maniculatus, 10?5 :g g-1) were higher than those inducing serious problems, including mortality, in experimental mammals on Pb-contaminated diets. Concentrations of Cd, Cu, Hg, and Zn were generally low. Declines in certain mammal populations have probably occurred in northern Idah as a result of direct toxicity of metals and associated secondary effects on cover and food supply.

Blus, L.J.; Henny, C.J.; Mulhern, B.M.

1987-01-01

387

Stratigraphy of the unsaturated zone at the radioactive waste management complex, Idaho National Engineering Laboratory, Idaho  

USGS Publications Warehouse

A complex sequence of layered basalt flows, cinders, and sediment underlies the Radioactive Waste Management Complex at the Idaho National Engineering Laboratory in southeastern Idaho. Wells drilled to 700 ft penetrate a sequence of 10 basalt-flow groups and 7 major sedimentary interbeds that range in age from about 100,000 to 600,000 years old. The 10 flow groups consist of 22 separate lava flows and flow-units. Each flow group is made up of from one to five petrographically similar flows that erupted from common source areas during periods of less than 200 years. Sedimentary interbeds consist of fluvial, lacustrine, and wind-blown deposits of clay, silt, sand, and gravel that accumulated during periods of volcanic inactivity ranging from thousands to hundreds of thousands of years. Flows and sediment are unsaturated to a depth of about 600 ft. Flows and sediment below a depth of 600 ft are saturated and make up the uppermost part of the Snake River Plain aquifer. The areal extent of flow groups and interbeds was determined from well cuttings, cores, geophysical logs, potassium-argon ages, and geomagnetic properties. Stratigraphical control was provided by four sequential basalt flows near the base of the unsaturated zone that have reversed geomagnetic polarity and high emission of natural gamma radiation compared to other flows. Natural gamma logs were used as a primary correlation tool. Natural-gamma emissions, which are generally uniform in related, petrographically similar flows, increase or decrease between petrographically dissimilar flows of different age and source. (USGS)

Anderson, S.R.; Lewis, B.D.

1989-01-01

388

76 FR 14898 - South Central Idaho Resource Advisory Committee  

Federal Register 2010, 2011, 2012, 2013

...Idaho Resource Advisory Committee will meet in Sun Valley, Idaho. The committee is meeting as...ADDRESSES: The meeting will be held at the Sun Valley City Hall Council Chambers, 810 Elkhorn Road, Sun Valley, Idaho 83353. Written comments...

2011-03-18

389

Baseline geochemical data for stream sediment and surface water samples from Panther Creek, the Middle Fork of the Salmon River, and the Main Salmon River from North Fork to Corn Creek, collected prior to the severe wildfires of 2000 in central Idaho  

USGS Publications Warehouse

In 1996, the U.S. Geological Survey conducted a reconnaissance baseline geochemical study in central Idaho. The purpose of the baseline study was to establish a 'geochemical snapshot' of the area, as a datum for monitoring future change in the geochemical landscape, whether natural or human-induced. This report presents the methology, analytical results, and sample descriptions for water, sediment, and heavy-mineral concentrate samples collected during this geochemical investigation. In the summer of 2000, the Clear Creek, Little Pistol, and Shellrock wildfires swept across much of the area that was sampled. Thus, these data represent a pre-fire baseline geochemical dataset. A 2001 post- fire study is planned and will involve re-sampling of the pre-fire baseline sites, to allow for pre- and post-fire comparison.

Eppinger, Robert G.; Briggs, Paul H.; Brown, Zoe Ann; Crock, James G.; Meier, Allen; Theodorakos, Peter M.; Wilson, Stephen A.

2001-01-01

390

Survey of Columbia River Basin streams for Columbia pebblesnail Fluminicola columbiana and shortface lanx Fisherola nuttalli  

SciTech Connect

At present, there are only two remaining sizable populations of Columbia pebblesnails Fluminicola columbiana; those in the Methow and Okanogan rivers, Washington. Smaller populations survive in the Hanford Reach of the Columbia River, Washington, and the lower Salmon River, Idaho, and possibly in the middle Snake River, Idaho; Hells Canyon of the Snake River, Idaho, Washington, and Oregon, and the Grande Ronde River, Oregon and Washington. Neither large population is at present protected, and there has been a substantial documented reduction in the species` historic range. Large populations of the shortface lanx Fisherolla nuttalli persist in four streams: the Deschutes River, Oregon; the Hanford Reach and Bonneville Dam area of the Columbia River, Washington and Oregon; Hens Canyon of the Snake River, Idaho and Oregon; and the Okanogan River, Washington. Smaller populations, or ones of uncertain size, are known from the lower Salmon and middle Snake rivers, Idaho; the Grande Ronde Washington and Oregon; Imnaha, and John Day rivers, Oregon; and the Methow River, Washington. While substantial range reduction has occurred in this species, and the large populations are not well protected, the problem is not as severe as in the case of the Columbia pebblesnail. Both species appear to have been widespread historically in the mainstem Columbia River and the Columbia River Basin prior to the installation of the current dam system. Both are now apparently reduced within the Columbia River to populations in the Hanford Reach and possibly other sites that are now separated by large areas of unsuitable habitat from those in the river`s major tributaries.

Neitzel, D.A. [Pacific Northwest Lab., Richland, WA (United States); Frest, T.J. [Deixis Consultants, Seattle, WA (United States)

1992-08-01

391

IDAHO HABITAT EVALUATION FOR OFFSITE MITIGATION RECORD  

E-print Network

and operation of hydroelectric facilities on the Columbia River and its tributaries. The views of this report . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Red Riverr . . . . . . . . . . . . . . . . . . . . . . . . SALMON RIVER . . . . . . . . . . . . . . . . . . . . . . . . . . . Panther Creek . . . . . . . . . . . . . . . . . . . . . . Upper Salmon River

392

Idaho Science, Technology, Engineering and Mathematics Overview  

ScienceCinema

Idaho National Laboratory has been instrumental in establishing the Idaho Science, Technology, Engineering and Mathematics initiative -- i-STEM, which brings together industry, educators, government and other partners to provide K-12 teachers with support, materials and opportunities to improve STEM instruction and increase student interest in technical careers. You can learn more about INL's education programs at http://www.facebook.com/idahonationallaboratory.

None

2013-05-28

393

Idaho Science, Technology, Engineering and Mathematics Overview  

SciTech Connect

Idaho National Laboratory has been instrumental in establishing the Idaho Science, Technology, Engineering and Mathematics initiative -- i-STEM, which brings together industry, educators, government and other partners to provide K-12 teachers with support, materials and opportunities to improve STEM instruction and increase student interest in technical careers. You can learn more about INL's education programs at http://www.facebook.com/idahonationallaboratory.

None

2011-01-01

394

Subgroup Achievement and Gap Trends: Idaho, 2010  

ERIC Educational Resources Information Center

This paper profiles the student subgroup achievement and gap trends in Idaho for 2010. Idaho showed improvement in reading and math in grade 8 at the basic, proficient, and advanced levels for Latino and white students, low income students, and boys and girls. The state has also made progress in narrowing achievement gaps between Latino and white…

Center on Education Policy, 2010

2010-01-01

395

Idaho Higher Education 1995 Fact Book.  

ERIC Educational Resources Information Center

This book reports on finances, students, faculty/staff, and intercollegiate athletics at Idaho's institutions of higher education. Most information concerns the state's public four-year colleges and its three universities with selected data on institutions providing vocational education and Idaho's two community colleges. Most of the data come…

Idaho State Board of Education, Boise.

396

MORES CREEK STUDY, BOISE COUNTY, IDAHO, 1979  

EPA Science Inventory

In Water Year 1979, a water quality study was conducted on Mores Creek in Boise County, Idaho (17050112) to determine the present water quality of the stream and obtain background information on effluent limitations development for Idaho City. The study was designed for approxim...

397

Planning Study for North Idaho College.  

ERIC Educational Resources Information Center

This three-part, long-range planning study was undertaken to assist North Idaho College (NIC) to more effectively meet the educational needs and interests of youth and adults residing in the five county Panhandle Area of Northern Idaho. Part I discusses NIC and its community; presents the results of a study of the educational plans and attitudes…

Young, Raymond J.

398

University of Idaho Arboretum and Botanical Garden  

E-print Network

University of Idaho Arboretum and Botanical Garden Commemorative Granite Benches Paul Warnick 1. Marvell, 1681 R-17 #12;University of Idaho Arboretum and Botanical Garden Commemorative Granite Benches Arboretum and Botanical Garden Commemorative Granite Benches Paul Warnick 1/21/05 Year Commemorating: Quote

Waits, Lisette

399

Idaho Habitat/Natural Production Monitoring Part I, 1995 Annual Report.  

SciTech Connect

The Idaho Department of Fish and Game (IDFG) has been monitoring trends in juvenile spring and summer chinook salmon, Oncorhynchus tshawytscha, and steelhead trout, O. mykiss, populations in the Salmon, Clearwater, and lower Snake River drainages for the past 12 years. This work is the result of a program to protect, mitigate, and enhance fish and wildlife affected by the development and operation of hydroelectric power plants on the Columbia River. Project 91-73, Idaho Natural Production Monitoring, consists of two subprojects: General Monitoring and Intensive Monitoring. This report updates and summarizes data through 1995 for the General Parr Monitoring (GPM) database to document status and trends of classes of wild and natural chinook salmon and steelhead trout populations. A total of 281 stream sections were sampled in 1995 to monitor trends in spring and summer chinook salmon Oncorhynchus tshawytscha and steelhead trout O. mykiss parr populations in Idaho. Percent carrying capacity and density estimates were summarized for 1985--1995 by different classes of fish: wild A-run steelhead trout, wild B-run steelhead trout, natural A-run steelhead trout, natural B-run steelhead trout, wild spring and summer chinook salmon, and natural spring and summer chinook salmon. The 1995 data were also summarized by subbasins as defined in Idaho Department of Fish and Game`s 1992--1996 Anadromous Fish Management Plan.

Hall-Griswold, J.A.; Petrosky, C.E. (Idaho Department of Fish and Game, Boise, ID)

1996-12-01

400

Bull trout (Salvelinus confluentus) movement in a transboundary river  

Microsoft Academic Search

The bull trout (Salvelinus confluentus) is listed as a threatened species and is native to the Kootenai River, Idaho and Montana, USA, and British Columbia (BC), Canada. Little is known about its life history and movements downstream of Kootenai Falls, Montana. Between 1998 and 2006, 19 bull trout were monitored in the Kootenai River with radio and sonic transmitters. Two

Vaughn L. Paragamian; Jody P. Walters

2011-01-01

401

Survey of Columbia River Basin streams for Columbia pebblesnail Fluminicola columbiana and shortface lanx Fisherola nuttalli  

SciTech Connect

At present, there are only two remaining sizable populations of Columbia pebblesnails Fluminicola columbiana; those in the Methow and Okanogan rivers, Washington. Smaller populations survive in the Hanford Reach of the Columbia River, Washington, and the lower Salmon River, Idaho, and possibly in the middle Snake River, Idaho; Hells Canyon of the Snake River, Idaho, Washington, and Oregon, and the Grande Ronde River, Oregon and Washington. Neither large population is at present protected, and there has been a substantial documented reduction in the species' historic range. Large populations of the shortface lanx Fisherolla nuttalli persist in four streams: the Deschutes River, Oregon; the Hanford Reach and Bonneville Dam area of the Columbia River, Washington and Oregon; Hens Canyon of the Snake River, Idaho and Oregon; and the Okanogan River, Washington. Smaller populations, or ones of uncertain size, are known from the lower Salmon and middle Snake rivers, Idaho; the Grande Ronde Washington and Oregon; Imnaha, and John Day rivers, Oregon; and the Methow River, Washington. While substantial range reduction has occurred in this species, and the large populations are not well protected, the problem is not as severe as in the case of the Columbia pebblesnail. Both species appear to have been widespread historically in the mainstem Columbia River and the Columbia River Basin prior to the installation of the current dam system. Both are now apparently reduced within the Columbia River to populations in the Hanford Reach and possibly other sites that are now separated by large areas of unsuitable habitat from those in the river's major tributaries.

Neitzel, D.A. (Pacific Northwest Lab., Richland, WA (United States)); Frest, T.J. (Deixis Consultants, Seattle, WA (United States))

1992-08-01

402

Evaluation of Bias in Roadside Point Count Surveys of Passerines in Shrubsteppe and Grassland Habitats in Southwestern Idaho1  

E-print Network

, songbirds may serve as sensitive indicators of ecosystem disturbance or other habitat changes. Before any the Snake River Birds of Prey Area (SRBOPA) in southwestern Idaho. We asked if abundances of species. Methods Study Area The 195,325-ha SRBOPA, located south of Boise and west of Mountain Home on the Snake

Standiford, Richard B.

403

Accumulation and effects of lead and cadmium on wood ducks near a mining and smelting complex in Idaho  

Microsoft Academic Search

A study of wood ducks (Aix sponsa) was conducted along the Coeur d'Alene River system in northern Idaho in 1986 and 1987. Most of this area has been subjected to severe contamination from lead and other metals from mining and smelting since the 1880s. In 1986, a preliminary study of wood duck nesting was conducted in the contaminated area; incubating

Lawrence J. Blus; Charles J. Henny; David J. Hoffman; Robert A. Grove

1993-01-01

404

A COMPARISON OF BREEDING SEASON FOOD HABITS OF BURROWING OWLS NESTING IN AGRICULTURAL AND NONAGRICULTURAL HABITAT IN IDAHO  

Microsoft Academic Search

Through analysis of regurgitated pellets and prey remains collected at nests between 2001- 02, we characterized diet composition of western Burrowing Owls (Athene cunicularia hypugaea) in the Snake River Birds of Prey National Conservation Area (NCA) of southwestern Idaho. We hypothesized that diet differs between owls nesting in agricultural and nonagricultural habitat, because at least one important prey species, montane

COLLEEN E. MOULTON; RYAN S. BRADY; R. BELTHOFF

405

Fires in Idaho and Montana  

NASA Technical Reports Server (NTRS)

2000 continues to be the worst fire season in the United States in decades. By August 8, 2000, fires in Montana and Idaho had burned more than 250,000 acres. Resources were stretched so thin that Army and Marine soldiers were recruited to help fight the fires. President Clinton visited Payette National Forest to lend moral support to the firefighters. Dense smoke from Idaho and western Montana is visible stretching all the way to North and South Dakota in this image from the Sea-viewing Wide Field-of-view Sensor (SeaWiFS). The image was taken on August 7, 2000. Although the primary mission of SeaWiFS is to measure the biology of the ocean, it also provides stunning color imagery of the Earth's surface. For more information about fires in the U.S., visit the National Interagency Fire Center. To learn more about using satellites to monitor fires, visit Global Fire Monitoring and New Technology for Monitoring Fires from Space in the Earth Observatory. Provided by the SeaWiFS Project, NASA/Goddard Space Flight Center, and ORBIMAGE

2002-01-01

406

Kilometer-Scale Rapid Transport of Naphthalene Sulfonate Tracer in the Unsaturated Zone at the Idaho National Engineering and Environmental Laboratory  

Microsoft Academic Search

tritium has been detected in plants and in boreholes within the 108-m-thick unsaturated zone at much To investigate possible long-range flow paths through the interbed- far-reaching flow may be common throughout the Snake River Plain, Plain in southeastern Idaho near the Idaho National and possibly occurs in other locations that have a geologically complex Engineering and Environmental Laboratory (INEEL), unsaturated

John R. Nimmo; Kim S. Perkins; Peter E. Rose; Joseph P. Rousseau; Brennon R. Orr; Brian V. Twining; Steven R. Anderson

2002-01-01

407

Lead toxicosis in tundra swans near a mining and smelting complex in northern Idaho  

Microsoft Academic Search

Die-offs of waterfowl have occurred in the Coeur d'Alene River system in northern Idaho since at least the early 1900's. We investigated causes of mortality and lead and cadmium contamination of 46 tundra swans (Cygnus columbianus) from 1987 to 1989; an additional 22 swans found dead in 1990 were not examined. We necropsied 43 of the 46 birds found from

Lawrence J. Blus; Charles J. Henny; David J. Hoffman; Robert A. Grove

1991-01-01

408

A geological reconnaissance across the Bitterroot Range and Clearwater Mountains in Montana and Idaho  

USGS Publications Warehouse

This report describes, in a preliminary way, a belt of country extending westward from the Bitterroot Valley, across the dividing range and the rugged mountains of the Clearwater system, down to the fertile plateaus which border the canyon of Snake River. It thus presents a reconnaissance section from western Montana across northern Idaho, and deals chiefly with areas about which, thus far, little geological information has been available.

Lindgren, Waldemar

1904-01-01

409

Amelanchier alnifolia vegetation in eastern Idaho, USA and its environmental relationships  

Microsoft Academic Search

Fifteen shrub stands of Amelanchier alnifolia vegetation were studied using ‘Braun-Blanquet’ procedures, tabulated, and ordered by Twinspan, Decorana, and field experience into 5 groups of stands. The stands occurred on the lower slopes of the southwestern Teton and southeastern Big Hole mountains of eastern Idaho and in-and outside a U.S. Forest Service exclosure above the Hoback River in adjacent Wyoming.

J. Major; M. Rejmanek

1992-01-01