Science.gov

Sample records for access bridge spanning

  1. 9. VIEW OF INTAKE PIER AND MAIN SPAN OF ACCESS ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    9. VIEW OF INTAKE PIER AND MAIN SPAN OF ACCESS BRIDGE FROM WATER LEVEL, LOOKING NORTHWEST. - Sacramento River Water Treatment Plant Intake Pier & Access Bridge, Spanning Sacramento River approximately 175 feet west of eastern levee on river; roughly .5 mile downstream from confluence of Sacramento & American Rivers, Sacramento, Sacramento County, CA

  2. 16. LOG AND PLANK BRIDGE ON ACCESS ROAD NEAR BRIDGE ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    16. LOG AND PLANK BRIDGE ON ACCESS ROAD NEAR BRIDGE SITE; SAME STRUCTURE AS SHOWN IN PHOTO #12. ZION NP NEGATIVE NO. 967 ZIO. - Zion-Mount Carmel Highway, Virgin River Bridge, Spanning North Fork of Virgin River on Zion-Mount Carmel Highway, Springdale, Washington County, UT

  3. 1. VIEW NORTHWEST, THROUGH CENTER SPAN OF EASTBOUND BRIDGE, WESTBOUND ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    1. VIEW NORTHWEST, THROUGH CENTER SPAN OF EASTBOUND BRIDGE, WESTBOUND BRIDGE IN BACKGROUND - Willow Run Expressway Bridge No. R01, Spanning Conrail Railway, eastbound, at US-10, Ypsilanti, Washtenaw County, MI

  4. 9. VIEW OF BRIDGE NEAR CENTER SPAN, LOOKING NORTH FROM ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    9. VIEW OF BRIDGE NEAR CENTER SPAN, LOOKING NORTH FROM THE ARROYO SECO. THE PARKER-MAYBERRY BRIDGE IS BELOW THE COLORADO STREET BRIDGE, THE PIONEER BRIDGE IS IN THE BACKGROUND. - Colorado Street Bridge, Spanning Arroyo Seco at Colorado Boulevard, Pasadena, Los Angeles County, CA

  5. 44. Detail, bridge land span outboard girder brackets carrying utility ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    44. Detail, bridge land span outboard girder brackets carrying utility conduit. Structure rests on granite blocks mounted on granite piers. - Broadway Bridge, Spanning Foundry Street, MBTA Yard, Fort Point Channel, & Lehigh Street, Boston, Suffolk County, MA

  6. 13. Underside Span 1, Hot Metal Bridge on right toward ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    13. Underside Span 1, Hot Metal Bridge on right toward Pier 1. - Monongahela Connecting Railroad Company, Hot Metal Bridge, Spanning Monongahela River at mile post 3.1, Pittsburgh, Allegheny County, PA

  7. 2. AERIAL VIEW OF THE VERTICAL LIFT BRIDGES SPANNING THE ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    2. AERIAL VIEW OF THE VERTICAL LIFT BRIDGES SPANNING THE HACKENSACK RIVER, LOOKING NORTHEAST. THE PATH TRANSIT BRIDGE IS IN THE FOREGROUND, WITH THE CONRAIL (HAER No. NJ-43), NEWARK TURNPIKE, AND ERIE & LACKAWANNA RAILROAD (HAER No. NJ-42) BRIDGES BEHIND IT - Path Transit System Bridge, Spanning Hackensack River, Kearny, Hudson County, NJ

  8. 23 CFR 650.809 - Movable span bridges.

    Code of Federal Regulations, 2011 CFR

    2011-04-01

    ... 23 Highways 1 2011-04-01 2011-04-01 false Movable span bridges. 650.809 Section 650.809 Highways FEDERAL HIGHWAY ADMINISTRATION, DEPARTMENT OF TRANSPORTATION ENGINEERING AND TRAFFIC OPERATIONS BRIDGES, STRUCTURES, AND HYDRAULICS Navigational Clearances for Bridges § 650.809 Movable span bridges. A fixed...

  9. 23 CFR 650.809 - Movable span bridges.

    Code of Federal Regulations, 2012 CFR

    2012-04-01

    ... 23 Highways 1 2012-04-01 2012-04-01 false Movable span bridges. 650.809 Section 650.809 Highways FEDERAL HIGHWAY ADMINISTRATION, DEPARTMENT OF TRANSPORTATION ENGINEERING AND TRAFFIC OPERATIONS BRIDGES, STRUCTURES, AND HYDRAULICS Navigational Clearances for Bridges § 650.809 Movable span bridges. A fixed...

  10. 23 CFR 650.809 - Movable span bridges.

    Code of Federal Regulations, 2010 CFR

    2010-04-01

    ... 23 Highways 1 2010-04-01 2010-04-01 false Movable span bridges. 650.809 Section 650.809 Highways FEDERAL HIGHWAY ADMINISTRATION, DEPARTMENT OF TRANSPORTATION ENGINEERING AND TRAFFIC OPERATIONS BRIDGES, STRUCTURES, AND HYDRAULICS Navigational Clearances for Bridges § 650.809 Movable span bridges. A fixed...

  11. 23 CFR 650.809 - Movable span bridges.

    Code of Federal Regulations, 2014 CFR

    2014-04-01

    ... 23 Highways 1 2014-04-01 2014-04-01 false Movable span bridges. 650.809 Section 650.809 Highways FEDERAL HIGHWAY ADMINISTRATION, DEPARTMENT OF TRANSPORTATION ENGINEERING AND TRAFFIC OPERATIONS BRIDGES, STRUCTURES, AND HYDRAULICS Navigational Clearances for Bridges § 650.809 Movable span bridges. A fixed...

  12. 23 CFR 650.809 - Movable span bridges.

    Code of Federal Regulations, 2013 CFR

    2013-04-01

    ... 23 Highways 1 2013-04-01 2013-04-01 false Movable span bridges. 650.809 Section 650.809 Highways FEDERAL HIGHWAY ADMINISTRATION, DEPARTMENT OF TRANSPORTATION ENGINEERING AND TRAFFIC OPERATIONS BRIDGES, STRUCTURES, AND HYDRAULICS Navigational Clearances for Bridges § 650.809 Movable span bridges. A fixed...

  13. 4. VIEW SHOWING TWO SPANS NEAR CENTER OF BRIDGE, LOOKING ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    4. VIEW SHOWING TWO SPANS NEAR CENTER OF BRIDGE, LOOKING NORTH. THE SMALLER PARKER-MAYBERRY BRIDGE CAN BE SEEN BELOW THE MAIN BRIDGE, AND THE NEW PIONEER BRIDGE IS IN THE BACKGROUND. THE ARROYO CHANNEL, CONSTRUCTED BY THE WORKS PROGRESS ADMINISTRATION DURING THE 1930s, IS VISIBLE ALONG THE ARROYO SECO BELOW THE PARKER-MAYBERRY BRIDGE. - Colorado Street Bridge, Spanning Arroyo Seco at Colorado Boulevard, Pasadena, Los Angeles County, CA

  14. General closeup view of the swing span bridge in the ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    General close-up view of the swing span bridge in the close position, looking upriver. The pivot/center pier is positioned in the center of Tennessee River. Note: Each arm of the continuous swing span acts as simple spans. The total span over four (4) supports is partially continuous-- the middle panel at the center pier is continuous for bending moments, but discontinuous for shears. - Bridgeport Swing Span Bridge, Spanning Tennessee River, Bridgeport, Jackson County, AL

  15. 12. DETAIL VIEW OF BRIDGE, SHOWING SPRING LINE OF SPANS ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    12. DETAIL VIEW OF BRIDGE, SHOWING SPRING LINE OF SPANS FROM CROWN OF MID-CHANNEL PIER, PAIRED COLUMNS SUPPORTING DECK, ARCHED WINDOW RAILING, LOOKING WEST-NORTHWEST FROM EUREKA SOUTHERN RAILROAD BRIDGE. CABLES VISIBLE IN BACKGROUND ARE EARTHQUAKE RESTRAINERS RETROFITTED TO 1952 HIGHWAY BRIDGE, WHICH FUNCTIONED AS DESIGNED IN APRIL 1992 TEMBLOR - Van Duzen River Bridge, Spanning Van Duzen River at CA State Highway 101, Alton, Humboldt County, CA

  16. The SPAN cookbook: A practical guide to accessing SPAN

    NASA Technical Reports Server (NTRS)

    Mason, Stephanie; Tencati, Ronald D.; Stern, David M.; Capps, Kimberly D.; Dorman, Gary; Peters, David J.

    1990-01-01

    This is a manual for remote users who wish to send electronic mail messages from the Space Physics Analysis Network (SPAN) to scientific colleagues on other computer networks and vice versa. In several instances more than one gateway has been included for the same network. Users are provided with an introduction to each network listed with helpful details about accessing the system and mail syntax examples. Also included is information on file transfers, remote logins, and help telephone numbers.

  17. 8. East portal of 1898 swing span of Bridge Number ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    8. East portal of 1898 swing span of Bridge Number 210.52, view to east, 210mm lens. Note the difference in the latticed portal strut as compared to that of the 1929 approach span in the previous photo. - Southern Pacific Railroad Shasta Route, Bridge No. 210.52, Milepost 210.52, Tehama, Tehama County, CA

  18. 104. Connecticut River Bridge draw span. Old Lyme, New London ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    104. Connecticut River Bridge draw span. Old Lyme, New London Co., CT. Sec. 4209, MP 106.89. - Northeast Railroad Corridor, Amtrak Route between New York/Connecticut & Connecticut/Rhode Island State Lines, New Haven, New Haven County, CT

  19. 103. Connecticut River Bridge draw span. Old Lyme, New London ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    103. Connecticut River Bridge draw span. Old Lyme, New London Co., CT. Sec. 4209, MP 106.89. - Northeast Railroad Corridor, Amtrak Route between New York/Connecticut & Connecticut/Rhode Island State Lines, New Haven, New Haven County, CT

  20. 1. OVERALL VIEW OF INTAKE PIER AND ACCESS BRIDGE, LOOKING ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    1. OVERALL VIEW OF INTAKE PIER AND ACCESS BRIDGE, LOOKING NORTHEAST FROM WESTERN LEVEE OF THE SACRAMENTO RIVER. - Sacramento River Water Treatment Plant Intake Pier & Access Bridge, Spanning Sacramento River approximately 175 feet west of eastern levee on river; roughly .5 mile downstream from confluence of Sacramento & American Rivers, Sacramento, Sacramento County, CA

  1. 2. OVERALL VIEW OF INTAKE PIER AND ACCESS BRIDGE, LOOKING ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    2. OVERALL VIEW OF INTAKE PIER AND ACCESS BRIDGE, LOOKING NORTH. - Sacramento River Water Treatment Plant Intake Pier & Access Bridge, Spanning Sacramento River approximately 175 feet west of eastern levee on river; roughly .5 mile downstream from confluence of Sacramento & American Rivers, Sacramento, Sacramento County, CA

  2. Sacramento River Water Treatment Plant Intake Pier & Access Bridge, ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    Sacramento River Water Treatment Plant Intake Pier & Access Bridge, Spanning Sacramento River approximately 175 feet west of eastern levee on river; roughly .5 mile downstream from confluence of Sacramento & American Rivers, Sacramento, Sacramento County, CA

  3. Bridging Spans the Gaps in Project Delivery.

    ERIC Educational Resources Information Center

    Heery, George T.

    2002-01-01

    Discusses the advantages of "bridging," a hybrid project delivery approach that uses an owner's design architect and program manager to prepare preliminary design and specification documents, and then has this team closely supervise the contractor's architect and engineers in finalizing the construction documents. (EV)

  4. 13. Detail, portal connection point of 1898 swing span, Bridge ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    13. Detail, portal connection point of 1898 swing span, Bridge Number 210.52, view to northeast, 210mm lens. Visible are the latticed portal strut at right, inclined end post, vertical hanger, top chord at left, paired diagonal eyebars, and one end of a top lateral. - Southern Pacific Railroad Shasta Route, Bridge No. 210.52, Milepost 210.52, Tehama, Tehama County, CA

  5. Bridge 40, detail, the spans are distorted upgrade from years ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    Bridge 40, detail, the spans are distorted upgrade from years of loaded westbound traffic traveling downgrade. Located at Milepost 40.31 - Camas Prairie Railroad, Second Subdivision, From Spalding in Nez Perce County, through Lewis County, to Grangeville in Idaho County, Spalding, Nez Perce County, ID

  6. Western deck plate girder span of Bridge No. 1413, Sixth ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    Western deck plate girder span of Bridge No. 1413, Sixth Potomac Crossing, passing over MD 51, with "WESTERN MARYLAND RAILWAY" painted on the girder panels, looking northwest. - Western Maryland Railway, Cumberland Extension, Pearre to North Branch, from WM milepost 125 to 160, Pearre, Washington County, MD

  7. Application of an automated wireless structural monitoring system for long-span suspension bridges

    SciTech Connect

    Kurata, M.; Lynch, J. P.; Linden, G. W. van der; Hipley, P.; Sheng, L.-H.

    2011-06-23

    This paper describes an automated wireless structural monitoring system installed at the New Carquinez Bridge (NCB). The designed system utilizes a dense network of wireless sensors installed in the bridge but remotely controlled by a hierarchically designed cyber-environment. The early efforts have included performance verification of a dense network of wireless sensors installed on the bridge and the establishment of a cellular gateway to the system for remote access from the internet. Acceleration of the main bridge span was the primary focus of the initial field deployment of the wireless monitoring system. An additional focus of the study is on ensuring wireless sensors can survive for long periods without human intervention. Toward this end, the life-expectancy of the wireless sensors has been enhanced by embedding efficient power management schemes in the sensors while integrating solar panels for power harvesting. The dynamic characteristics of the NCB under daily traffic and wind loads were extracted from the vibration response of the bridge deck and towers. These results have been compared to a high-fidelity finite element model of the bridge.

  8. Application of AN Automated Wireless Structural Monitoring System for Long-Span Suspension Bridges

    NASA Astrophysics Data System (ADS)

    Kurata, M.; Lynch, J. P.; van der Linden, G. W.; Hipley, P.; Sheng, L.-H.

    2011-06-01

    This paper describes an automated wireless structural monitoring system installed at the New Carquinez Bridge (NCB). The designed system utilizes a dense network of wireless sensors installed in the bridge but remotely controlled by a hierarchically designed cyber-environment. The early efforts have included performance verification of a dense network of wireless sensors installed on the bridge and the establishment of a cellular gateway to the system for remote access from the internet. Acceleration of the main bridge span was the primary focus of the initial field deployment of the wireless monitoring system. An additional focus of the study is on ensuring wireless sensors can survive for long periods without human intervention. Toward this end, the life-expectancy of the wireless sensors has been enhanced by embedding efficient power management schemes in the sensors while integrating solar panels for power harvesting. The dynamic characteristics of the NCB under daily traffic and wind loads were extracted from the vibration response of the bridge deck and towers. These results have been compared to a high-fidelity finite element model of the bridge.

  9. A 15degree sideview of the swing span bridge in the ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    A 15-degree sideview of the swing span bridge in the open position, with the 364' - 0-1/2' swing span balanced on the center/pivot pier where the two (2) center supports deliver their loads onto a system of distributing girders, circular drum and rim bearing support wheels. The pier is circular and of stone masonry construction. - Bridgeport Swing Span Bridge, Spanning Tennessee River, Bridgeport, Jackson County, AL

  10. Reliability assessment of long span bridges based on structural health monitoring: application to Yonghe Bridge

    NASA Astrophysics Data System (ADS)

    Li, Shunlong; Li, Hui; Ou, Jinping; Li, Hongwei

    2009-07-01

    This paper presents the reliability estimation studies based on structural health monitoring data for long span cable stayed bridges. The data collected by structural health monitoring system can be used to update the assumptions or probability models of random load effects, which would give potential for accurate reliability estimation. The reliability analysis is based on the estimated distribution for Dead, Live, Wind and Temperature Load effects. For the components with FBG strain sensors, the Dead, Live and unit Temperature Load effects can be determined by the strain measurements. For components without FBG strain sensors, the Dead and unit Temperature Load and Wind Load effects of the bridge can be evaluated by the finite element model, updated and calibrated by monitoring data. By applying measured truck loads and axle spacing data from weight in motion (WIM) system to the calibrated finite element model, the Live Load effects of components without FBG sensors can be generated. The stochastic process of Live Load effects can be described approximately by a Filtered Poisson Process and the extreme value distribution of Live Load effects can be calculated by Filtered Poisson Process theory. Then first order reliability method (FORM) is employed to estimate the reliability index of main components of the bridge (i.e. stiffening girder).

  11. 77 FR 73541 - Safety Zone: Gilmerton Bridge Center Span Float-in, Elizabeth River; Norfolk, Portsmouth, and...

    Federal Register 2010, 2011, 2012, 2013, 2014

    2012-12-11

    ... [Docket No. USCG-2012-0642] RIN 1625-AA00 Safety Zone: Gilmerton Bridge Center Span Float-in, Elizabeth... safety of life on navigable waters during the Gilmerton Bridge Center Span Float- in and bridge construction of span placement. This action is intended to restrict vessel traffic movement to protect...

  12. 77 FR 43557 - Safety Zone; Gilmerton Bridge Center Span Float-in, Elizabeth River; Norfolk, Portsmouth, and...

    Federal Register 2010, 2011, 2012, 2013, 2014

    2012-07-25

    ... SECURITY Coast Guard 33 CFR Part 165 RIN 1625-AA00 Safety Zone; Gilmerton Bridge Center Span Float-in... provide for the safety of life on navigable waters during the Gilmerton Bridge Center Span Float- in and bridge construction of span placement. This action is intended to restrict vessel traffic movement...

  13. Boston & Maine Railroad, Berlin Branch Bridge #143.06, Spanning Snyder ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    Boston & Maine Railroad, Berlin Branch Bridge #143.06, Spanning Snyder Brook at former Boston & Maine Railroad (now Presidential Range Rail Trail), just south of U.S. Route 2, Randolph, Coos County, NH

  14. 77 FR 44544 - Safety Zone; Gilmerton Bridge Center Span Float-In, Elizabeth River; Norfolk, Portsmouth, and...

    Federal Register 2010, 2011, 2012, 2013, 2014

    2012-07-30

    ... SECURITY Coast Guard 33 CFR Part 165 RIN 1625-AA00 Safety Zone; Gilmerton Bridge Center Span Float-In... Span Float-in and bridge construction of span placement. The original proposal had a start date of July... span lift construction. DATES: The proposed rule is withdrawn on July 6, 2012. ADDRESSES: The...

  15. THIS 103FOOT SPAN MOSELY WROUGHTIRON BOWSTRING ARCHTRUSS BRIDGE ERECTED IN ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    THIS 103-FOOT SPAN MOSELY WROUGHT-IRON BOWSTRING ARCH-TRUSS BRIDGE ERECTED IN 1870 CARRIED EMPLOYEES AND MATERIALS ALONG WITH STEAM HEAT AND GAS LINES. IT IS VALUABLE AS A RARE SURVIVING EXAMPLE OF THIS TYPE OF BRIDGE AND IS AMONG THE EARLIEST OF ITS TYPE IN AMERICA. - Claremont Village Industrial District, Between B, Claremont, Sullivan County, NH

  16. Seismic spatial effects on dynamic response of long-span bridges in stationary inhomogeneous random fields

    NASA Astrophysics Data System (ADS)

    Jiahao, Lin; Yahui, Zhang; Yan, Zhao

    2004-12-01

    The seismic analysis of long-span bridges subjected to multiple ground excitations is an important problem. The conventional response spectrum method neglects the spatial effects of ground motion, and therefore may result in questionable conclusions. The random vibration approach has been regarded as more reliable. Unfortunately, so far, computational difficulties have not yet been satisfactorily resolved. In this paper, an accurate and efficient random vibration approach — pseudo excitation method (PEM), by which the above difficulties are overcome, is presented. It has been successfully used in the three dimensional seismic analysis of a number of long-span bridges with thousands of degrees of freedom and dozens of supports. The numerical results of a typical bridge show that the seismic spatial effects, particularly the wave passage effect, are sometimes quite important in evaluating the safety of long-span bridges.

  17. Structural health monitoring of long-span suspension bridges using wavelet packet analysis

    NASA Astrophysics Data System (ADS)

    Ding, Youliang; Li, Aiqun

    2007-09-01

    During the service life of civil engineering structures such as long-span bridges, local damage at key positions may continually accumulate, and may finally result in their sudden failure. One core issue of global vibration-based health monitoring methods is to seek some damage indices that are sensitive to structural damage. This paper proposes an online structural health monitoring method for long-span suspension bridges using wavelet packet transform (WPT). The WPT-based method is based on the energy variations of structural ambient vibration responses decomposed using wavelet packet analysis. The main feature of this method is that the proposed wavelet packet energy spectrum (WPES) has the ability to detect structural damage from ambient vibration tests of a long-span suspension bridge. As an example application, the WPES-based health monitoring system is used on the Runyang Suspension Bridge under daily environmental conditions. The analysis reveals that changes in environmental temperature have a long-term influence on the WPES, while the effect of traffic loadings on the measured WPES of the bridge presents instantaneous changes because of the nonstationary properties of the loadings. The condition indication indices V D reflect the influences of environmental temperature on the dynamic properties of the Runyang Suspension Bridge. The field tests demonstrate that the proposed WPES-based condition indication index V D is a good candidate index for health monitoring of long-span suspension bridges under ambient excitations.

  18. Full implementations of structural health monitoring systems for long-span bridges and large-span domes

    NASA Astrophysics Data System (ADS)

    Li, Hui; Ou, Jinping

    2006-03-01

    In this paper, full implementations of structural health monitoring systems for long-span bridges and large-span domes are introduced. The frameworks of the health monitoring systems are introduced. The types and locations of sensors are also presented. The data acquisition system, including scheme of data acquisition system, strategies of collecting data, instrument and software used in the data acquisition system, is described. The data transmitting system, data management system and warning system are also designed. Based on the data collected by the structural health monitoring systems, response and dynamic properties of the structures, and the loads are statistically analyzed. Finite element (FE) model is updated based on the measured data by structural health monitoring.

  19. Non-linear buffeting response analysis of long-span suspension bridges with central buckle

    NASA Astrophysics Data System (ADS)

    Wang, Hao; Li, Aiqun; Zhao, Gengwen; Li, Jian

    2010-06-01

    The rigid central buckle employed in the Runyang Suspension Bridge (RSB) was the first time it was used in a suspension bridge in China. By using a spectral representation method and FFT technique combined with measured data, a 3D fluctuating wind field considering the tower wind effect is simulated. A novel FE model for buffeting analysis is then presented, in which a specific user-defined Matrix27 element in ANSYS is employed to simulate the aeroelastic forces and its stiffness or damping matrices are parameterized by wind velocity and vibration frequency. A nonlinear time history analysis is carried out to study the influence of the rigid central buckle on the wind-induced buffeting response of a long-span suspension bridge. The results can be used as a reference for wind resistance design of long-span suspension bridges with a rigid central buckle in the future.

  20. Dynamic analysis of a long span, cable-stayed freeway bridge using NASTRAN

    NASA Technical Reports Server (NTRS)

    Salus, W. L.; Jones, R. E.; Ice, M. W.

    1973-01-01

    The dynamic analysis for earthquake- and wind-induced response of a long span, cable-stayed freeway bridge by NASTRAN in conjunction with post-processors is described. Details of the structural modeling, the input data generation, and numerical results are given. The influence of the dynamic analysis on the bridge design is traced from the project initiation to the development of a successful earthquake and wind resistant configuration.

  1. Three-dimensional nonlinear flutter analysis of long-span suspension bridges during erection.

    PubMed

    Zhang, Xin-jun; Sun, Bing-nan; Xiang, Hai-fan

    2003-01-01

    In this work, the aerodynamic stability of the Yichang Suspension Bridge over Yangtze River during erection was determined by three-dimensional nonlinear flutter analysis, in which the nonlinearities of structural dynamic characteristics and aeroelastic forces caused by large deformation are fully considered. An interesting result obtained was that the bridge was more stable when the stiffening girders were erected in a non-symmetrical manner as opposed to the traditional symmetrical erection schedule. It was also found that the severe decrease in the aerodynamic stability was due to the nonlinear effects. Therefore, the nonlinear factors should be considered accurately in aerodynamic stability analysis of long-span suspension bridges during erection.

  2. Seismic Responses of Shot Span Bridge under Three Different Patterns of Earthquake Excitations

    SciTech Connect

    Zhou Daochuan; Chen Guorong; Lu Yan

    2010-05-21

    This paper presents a study of the influence of three different types of seismic input methods on the longitudinal seismic response of a short, three-span, variable cross-section, reinforced concrete bridge. Research progress of the seismic model is introduced briefly. Finite element model is created for the bridge and time history analysis conducted. Three different types of illustrative excitations are considered: 1) the EI-Centro seismic wave is used as uniform excitations at all bridge supports; 2) fixed apparent wave velocity is used for response analysis of traveling wave excitations on the bridge; 3) conforming to a selected coherency model, the multiple seismic excitation time histories considering spatially variable effects are generated. The contrast study of the response analysis result under the three different seismic excitations is conducted and the influence of different seismic input methods is studied. The comparative analysis of the bridge model shows that the uniform ground motion input can not provide conservative seismic demands-in a number of cases it results in lower response than that predicted by multiple seismic excitations. The result of uniform excitation and traveling wave excitation shows very small difference. Consequently, multiple seismic excitations needs to be applied at the bridge supports for response analysis of short span bridge.

  3. Bridge 33, view looking north at Milepost 33.01. The spans ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    Bridge 33, view looking north at Milepost 33.01. The spans are leaning upgrade caused by loaded trains going downgrade - Camas Prairie Railroad, Second Subdivision, From Spalding in Nez Perce County, through Lewis County, to Grangeville in Idaho County, Spalding, Nez Perce County, ID

  4. 2. AVENUE 43 ACCESS ROAD AND BRIDGE ACROSS ARROYO SECO ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    2. AVENUE 43 ACCESS ROAD AND BRIDGE ACROSS ARROYO SECO WITH NORTHBOUND PARKWAY LANES IN FOREGROUND. LOOKING 76°E. - Arroyo Seco Parkway, Avenue 43 Bridge, Milepost 27.12, Los Angeles, Los Angeles County, CA

  5. The Response of Long-Span Bridges to Low Frequency, Near-Fault Earthquake Ground Motions

    SciTech Connect

    McCallen, David; Astaneh-Asl, A.; Larsen, S.C.; Hutchings, Larry

    2009-02-27

    Historical seismic hazard characterizations did not include earthquake ground motion waveforms at frequencies below approximately 0.2 Hz (5 seconds period). This resulted from limitations in early strong motion instrumentation and signal processing techniques, a lack of measurements in the near-field of major earthquakes and therefore no observational awareness, and a delayed understanding in the engineering community of the potential significance of these types of motions. In recent years, there is a growing recognition of the relevance of near-fault, low frequency motions, particularly for long-period structures such as large bridges. This paper describes a computationally based study of the effects of low frequency (long-period) near-fault motions on long-span bridge response. The importance of inclusion of these types of motions for long span cable supported bridges is demonstrated using actual measured broad-band, near-fault motions from large earthquakes.

  6. Structure-borne low-frequency noise from multi-span bridges: A prediction method and spatial distribution

    NASA Astrophysics Data System (ADS)

    Song, X. D.; Wu, D. J.; Li, Q.; Botteldooren, D.

    2016-04-01

    Structure-borne noise from railway bridges at far-field points is an important indicator in environmental noise assessment. However, studies that predict structure-borne noise tend to model only single-span bridges, thus ignoring the sound pressure radiating from adjacent spans. To simulate the noise radiating from multi-span bridges induced by moving vehicles, the vibrations of a multi-span bridge are first obtained from a three-dimensional (3D) vehicle-track-bridge dynamic interaction simulation using the mode superposition method. A procedure based on the 2.5-dimensional (2.5D) boundary element method (BEM) is then presented to promote the efficiency of acoustical computation compared with the 3D BEM. The simulated results obtained from both the single-span and multi-span bridge models are compared with the measured results. The sound predictions calculated from the single-span model are accurate only for a minority of near-field points. In contrast, the sound pressures calculated from the multi-span bridge model match the measured results in both the time and frequency domains for all of the near-field and far-field points. The number of bridge spans required in the noise simulation is then recommended related to the distance between the track center and the field points of interest. The spatial distribution of multi-span structure-borne noise is also studied. The variation in sound pressure levels is insignificant along the length of the bridge, which validates the finding that the sound test section can be selected at an arbitrary plane perpendicular to the multi-span bridge.

  7. Instrumentation for durability monitoring of a long-span cable-stayed bridge

    NASA Astrophysics Data System (ADS)

    Hua, X. G.; Ni, Y. Q.; Zhou, H. F.; Ko, J. M.

    2005-05-01

    This paper outlines the design of an instrumentation system for durability monitoring of the world's longest cable-stayed bridge: the Sutong Bridge with a central span of 1088 m. As part of the Structural Health Monitoring And Safety Evaluation System (SHMASES) for the Sutong Bridge, the durability monitoring system is designed to monitor the corrosion in reinforced concrete structures. The sensors for durability monitoring include two categories. The first category refers to the sensors to monitor the causes leading to corrosion, such as temperature and relative humidity. The second category is electrode assemblies which are used to monitor the end results of corrosion. Data from the sensory system are then periodically collected using a portable or remotely computerized data acquisition system. The collected data from this system will provide useful information on maintenance and repair of concrete structures, and are envisaged to be incorporated into the reliability-based safety evaluation system developed for the Sutong Bridge

  8. Recent Research and Applications of Numerical Simulation for Dynamic Response of Long-Span Bridges Subjected to Multiple Loads

    PubMed Central

    Chen, Zhiwei; Chen, Bo

    2014-01-01

    Many long-span bridges have been built throughout the world in recent years but they are often subject to multiple types of dynamic loads, especially those located in wind-prone regions and carrying both trains and road vehicles. To ensure the safety and functionality of these bridges, dynamic responses of long-span bridges are often required for bridge assessment. Given that there are several limitations for the assessment based on field measurement of dynamic responses, a promising approach is based on numerical simulation technologies. This paper provides a detailed review of key issues involved in dynamic response analysis of long-span multiload bridges based on numerical simulation technologies, including dynamic interactions between running trains and bridge, between running road vehicles and bridge, and between wind and bridge, and in the wind-vehicle-bridge coupled system. Then a comprehensive review is conducted for engineering applications of newly developed numerical simulation technologies to safety assessment of long-span bridges, such as assessment of fatigue damage and assessment under extreme events. Finally, the existing problems and promising research efforts for the numerical simulation technologies and their applications to assessment of long-span multiload bridges are explored. PMID:25006597

  9. Recent research and applications of numerical simulation for dynamic response of long-span bridges subjected to multiple loads.

    PubMed

    Chen, Zhiwei; Chen, Bo

    2014-01-01

    Many long-span bridges have been built throughout the world in recent years but they are often subject to multiple types of dynamic loads, especially those located in wind-prone regions and carrying both trains and road vehicles. To ensure the safety and functionality of these bridges, dynamic responses of long-span bridges are often required for bridge assessment. Given that there are several limitations for the assessment based on field measurement of dynamic responses, a promising approach is based on numerical simulation technologies. This paper provides a detailed review of key issues involved in dynamic response analysis of long-span multiload bridges based on numerical simulation technologies, including dynamic interactions between running trains and bridge, between running road vehicles and bridge, and between wind and bridge, and in the wind-vehicle-bridge coupled system. Then a comprehensive review is conducted for engineering applications of newly developed numerical simulation technologies to safety assessment of long-span bridges, such as assessment of fatigue damage and assessment under extreme events. Finally, the existing problems and promising research efforts for the numerical simulation technologies and their applications to assessment of long-span multiload bridges are explored.

  10. Thermal correlation analysis of a long-span suspension bridge static responses

    NASA Astrophysics Data System (ADS)

    Zhou, Linren; Chen, Lan; Xia, Yong; Brownjohn, James M. W.

    2016-04-01

    Harsh service environment degenerates the performance of bridges even leads to catastrophic collapse. Structural temperature has been widely recognized as one of the most negative environmental effects on bridges. The structural responses are deeply affected by the variation and distribution of temperatures on bridges. Therefore, identifying the correlations between them is a significant issue for structural safety assessment. In this study, the relationships between the temperature induced static response and the surrounding weather factors are investigated based on the long-term field measurements of a long-span suspension bridge. The correlations of the meteorological parameters between the bridge filed and the nearby weather station, and the relations of structural static responses to the air temperature, are investigated. The results indicate that relationships of meteorological parameters between nearby weather station and the bridge field can be predicted. The correlation between the static responses and the air temperature and is remarkable with high correlation coefficient. The conclusions are expected to provide reference for the design and evaluation of longspan suspension bridges.

  11. Seismic spatial effects on long-span bridge response in nonstationary inhomogeneous random fields

    NASA Astrophysics Data System (ADS)

    Jiahao, Lin; Yahui, Zhang; Yan, Zhao

    2005-06-01

    The long-span bridge response to nonstationary multiple seismic random excitations is investigated using the PEM (pseudo excitation method). This method transforms the nonstationary random response analysis into ordinary direct dynamic analysis, and therefore, the analysis can be solved conveniently using the Newmark, Wilson-θ schemes or the precise integration method. Numerical results of the seismic response for an actual long-span bridge using the proposed PEM are given and compared with the results based on the conventional stationary analysis. From the numerical comparisons, it was found that both the seismic spatial effect and the nonstationary effect are quite important, and that both stationary and nonstationary seismic analysis should pay special attention to the wave passage effect.

  12. Optical measurement system applied to continuous displacement monitoring of long-span suspension bridges

    NASA Astrophysics Data System (ADS)

    Lages Martins, L.; Rebordão, J. M.; Ribeiro, A. S.

    2013-04-01

    This paper provides a general description of main issues related to the design of an optical measurement system applied to continuous displacement monitoring of long-span suspension bridges. The proposed system's architecture is presented and its main components - camera and active targets - are described in terms of geometrical and radiometric characteristics required for long distance measurement of the tridimensional displacement of the stiffness girder in the middle section of the bridge's central span. The intrinsic and extrinsic camera parameterization processes, which support the adopted measurement approach, are explained in a specific section. Since the designed measurement system is intended to perform continuous displacement monitoring in long distance observation framework, particular attention is given to environmental effects, namely, refraction, turbulence and sensor saturation phenomena, which can influence the displacement measurement accuracy. Finally, a measurement uncertainty method is discussed in order to provide a suitable solution for the determination of the accuracy related to the proposed measurement approach.

  13. Dynamic Response of the Suspension Spans of the San Francisco-Oakland Bay Bridge

    SciTech Connect

    McCallen, D; Astaneh-Asl, A; Larsen, S; Hutchings, L

    2005-11-03

    The dynamic response of the suspension spans of the San Francisco-Oakland Bay Bridge (SFOBB) have been numerically modeled in a case-study to investigate the effects of long-period, near-field ground motions on flexible suspension bridges. The structural simulation model used in the study was developed as a special purpose computer program tailored to efficiently simulate the nonlinear response of cable supported bridges. The simulation model includes a number of special element technologies and solution algorithms that enable efficient nonlinear analysis of suspension bridges. The ground motions used in the study were site specific synthetic records for a Mw=7.25 earthquake along the Hayward fault at 12-15 km distant, and actual measured near-field records from the Izmit Turkey (1999) and Chi-Chi Taiwan (1999) earthquakes. These records include near- and far-field broad-band motions for three components. The results of the numerical simulations indicate that low frequency waveforms associated with near-field motions can place a significant demand on the structural systems of suspension bridges, and must be accounted for in suspension bridge analysis and design.

  14. Field Testing and Load Rating of a Short-Span Thermoplastic Bridge System, Bridge T-8519

    DTIC Science & Technology

    2010-11-01

    defined as elastoplastic , meaning it had primarily elastic behavior com- bined with time-dependent fluid properties as well. Allowable stress and...degradation or damage must be considered in future load ratings. ERDC/GSL TR-10-48 38 References AASHTO. 2003. Manual for the condition evaluation... damage or deterioration. Often, bridges are rated poorly because of inaccurate representations of the structural geometry or because the material and/or

  15. Long term application of bus monitoring system to short and medium span bridges and damage detection

    NASA Astrophysics Data System (ADS)

    Miyamoto, Ayaho; Lúcio, Válter J. G.; Emoto, Hisao; Tanaka, Hideaki

    2015-07-01

    In this study, as one solution to the problem for condition assessment of existing short and medium span reinforced/prestressed concrete bridges, a new monitoring method using a public bus as part of a public transit system (bus monitoring system) is proposed, along with safety indices, namely, characteristic deflection, which is relatively free from the influence of dynamic disturbances due to such factors as the roughness of the road surface, and a structural anomaly parameter. A basic study was conducted by using the results of technical verification experiments and numerical analysis simulation. This paper describes the details of not only how to assess the bridge condition by public bus vibration measured in operating on Ube City bus network as a specific example for verify the system but also what kind of consideration we need to apply the system to existing bridges in overseas country.

  16. Research on Hybrid Seismic Response Control System for Motion Control of Two Span Bridge

    NASA Astrophysics Data System (ADS)

    Heo, G.; Kim, C.; Jeon, S.; Seo, S.; Jeon, J.

    2016-09-01

    In this paper, a hybrid seismic response control (HSRC) system was developed to control bridge motion caused by seismic load. It was aimed at optimum vibration control, composed of a rubber bearing of passive type and a MR-damper of semi-active type. The bridge model was built for experiment, a two-span bridge of 8.3 meters in length with the HSRC system put up on it. Then, inflicting El-centro seismic load on it, shaking table tests were carried out to confirm the system's validity. The experiments were conducted under the basic structure state (without an MR-damper applied) first, and then under the state with an MR-damper applied. It was also done under the basic structure state with a reinforced rubber bearing applied, then the passive on/off state of the HSRC system, and finally the semi-active state where the control algorithm was applied to the system. From the experiments, it was observed that collision rather increased when the MR-damper alone was applied, and also that the application of the HSRC system effectively prevented it from occurring. As a result, the HSRC system was proven to be effective in mitigating responses of the two-span bridge under seismic load.

  17. Dynamic Strain Sensing in a Long-Span Suspension Bridge Using Fiber Bragg Grating Sensors

    NASA Astrophysics Data System (ADS)

    Zhu, Yinian; Zhu, Yan-Jin; Balogun, Oluwaseyi; Zhu, Songye; Xu, You-Lin; Krishnaswamy, Sridhar

    2011-06-01

    Optical fiber sensors are ideal for monitoring continuous deterioration conditions of civil infrastructure, especially of long-span bridges. Typically, a network of sensors is used to measure the strains or low frequency vibrational response of the structure. In this work, we demonstrate dynamic spectral demodulation of fiber Bragg grating (FBG) sensor responses with a stabilized Michelson interferometer for monitoring mechanical strains in a model of long-span bridge. A series of experiments has been performed, including the measurements of the natural resonant modes of the model bridge, impact response of a bridge member and acoustic emissions in a fractured aluminum bar. The experimental results not only reveal that dynamic spectral demodulation of FBG strain responses at frequencies extending up to about 3.5 MHz is possible, but also suggest that the method may be suitable for monitoring high frequency mechanical strains in civil structures that result from cracking or impact loading, thus providing a tool for local detection of structural damage.

  18. Buffeting response of long-span cable-supported bridges under skew winds. Part 1: theory

    NASA Astrophysics Data System (ADS)

    Zhu, L. D.; Xu, Y. L.

    2005-03-01

    A finite-element-based framework for buffeting analysis of long-span cable-supported bridges under skew winds is developed in the frequency domain utilizing the linear quasi-steady theory and the strip theory of aerodynamics in conjunction with the pseudo excitation method. A set of universal expressions for six components of buffeting forces is first derived in association with oblique cross-sections of bridge components, in which the buffeting forces are formed with respect to the wind coordinate system and then converted to those with respect to the structural coordinate system. Skew mean wind and three orthogonal components of velocity fluctuations can thus be easily handled without any further decomposition. The coherence between velocity fluctuations of wind turbulence at any two arbitrary spatial points is considered in the global wind coordinate system rather than in the global structural coordinate system. Aeroelastic stiffness and damping matrices due to self-excited forces are then taken into consideration in terms of the 18 flutter derivatives with respect to the oblique cross-sections. The pseudo-excitation method is finally employed to solve efficiently the fully coupled 3D buffeting problem of long-span cable-supported bridges under skew winds with the effects of multi-modes and spatial modes, inter-mode coupling and aerodynamic coupling, and the interaction among major bridge components being naturally included.

  19. Dimensional field testing of an optical measurement system in a long-span suspension bridge

    NASA Astrophysics Data System (ADS)

    Lages Martins, Luis F.; Rebordão, José Manuel; Ribeiro, Álvaro S.

    2015-05-01

    The dimensional field testing activity described in this paper allowed measuring the vertical and transverse dynamic displacement related to the main span (with a dimension equal to 1012 meters) central section of a long-span suspension bridge - the 25th of April Bridge (P25A), in Lisbon (Portugal) - using an optical system composed by high focal length lens (600 mm), digital image sensor and active infrared LED targets. Maximum values of 0,53 m and 0,29 m were obtained for the vertical and transverse displacements without rail traffic on the P25A. Passenger train circulation on the bridge's lower rail deck increased the vertical displacement up to 1,69 m. The applied measuring system was subjected to an in situ calibration procedure (SI traceable), showing maximum deviations close to 1,3 mm with an expanded measurement uncertainty (in a 95% confidence interval) around 3,0 mm, in a favorable observation scenario (winter season with low vertical thermal gradient in the atmosphere). Field studies of optical phenomena such as atmospheric refraction and beam wandering effect by turbulence were also performed, aiming the validation of developed refraction correction models and the quantification of targets image coordinates dispersions (0,13 pixel in winter season a 0,56 pixel during summer season).

  20. OPTIMUM INSPECTION POLICY FOR LONG SPAN BRIDGE BASED ON FAULT TREE ANALYSIS WITH VISUAL INSPECTION DATA

    NASA Astrophysics Data System (ADS)

    Kaito, Kiyoyuki; Kanaji, Hidesada; Kobayashi, Hiroshi; Mashima, Nobuhiro; Ohishi, Hideo; Matsuoka, Kodai

    This paper proposes a decision making methodology on an optimal inspection method/cycle for long span bridges, based on the two evaluation items: lifecycle cost and risk probability. Firstly, the authors formulate the aggregative Markov deterioration hazard model using visual inspection data, and propose a model for minimizing lifecycle cost. In addition, the authors express the risk of the management limit in the visual inspection of a long bridge with a fault tree, and calculate the probabilities of events constituting the fault tree with the Markov transition probability. Then, it becomes possible to grasp the variation in risk probability due to the difference in inspection and repair policies. Finally, the proposed method is applied to the actual case of determining an optimal inspection policy, to discuss its effectiveness empirically.

  1. Structural condition assessment of long-span suspension bridges using long-term monitoring data

    NASA Astrophysics Data System (ADS)

    Yang, Deng; Youliang, Ding; Aiqun, Li

    2010-03-01

    This paper focuses on developing an online structural condition assessment technique using long-term monitoring data measured by a structural health monitoring system. The seasonal correlations of frequency-temperature and beam-end displacement-temperature for the Runyang Suspension Bridge are performed, first. Then, a statistical modeling technique using a six-order polynomial is further applied to formulate the correlations of frequency-temperature and displacement-temperature, from which abnormal changes of measured frequencies and displacements are detected using the mean value control chart. Analysis results show that modal frequencies of higher vibration modes and displacements have remarkable seasonal correlations with the environmental temperature and the proposed method exhibits a good capability for detecting the micro damage-induced changes of modal frequencies and displacements. The results demonstrate that the proposed method can effectively eliminate temperature complications from frequency and displacement time series and is well suited for online condition monitoring of long-span suspension bridges.

  2. A Combined Geophysical/Engineering Approach for the Seismic Safety of Long-Span Bridges

    NASA Astrophysics Data System (ADS)

    Fäcke, Andreas; Stempniewski, Lothar; Richwalski, Sandra M.; Parolai, Stefano; Milkereit, Claus; Wang, Rongjiang; Bormann, Peter; Roth, Frank

    The spatial distribution of the resonance frequency of the sedimentary cover in the Cologne area was estimated by the horizontal-to-vertical spectral ratio method using ambient noise measurements. A comparison with the eigenfrequencies of selected long-span bridges crossing the Rhine river indicated an overlap in frequency and therefore potential damage in the case of an earthquake. Consequently, we conducted a dynamic vulnerability analysis using the finite-element method. In addition to accelerograms from design spectra, ground motion scenarios with sources located on the most proximate fault (Erft fault) were simulated using a numerical hybrid method that takes into account source, path, and site effects. The results indicated that due to the low frequency content of these scenarios, consistently higher responses - compared to the recommended loads in the German seismic code - were obtained at all selected bridges. Usage of both scenarios revealed specific failure mechanisms. While cable supported bridges seem to be secure, grave failure was detected for a box girder bridge.

  3. Minimum depth of soil cover above long-span soil-steel railway bridges

    NASA Astrophysics Data System (ADS)

    Esmaeili, Morteza; Zakeri, Jabbar Ali; Abdulrazagh, Parisa Haji

    2013-12-01

    Recently, soil-steel bridges have become more commonly used as railway-highway crossings because of their economical advantages and short construction period compared with traditional bridges. The currently developed formula for determining the minimum depth of covers by existing codes is typically based on vehicle loads and non-stiffened panels and takes into consideration the geometrical shape of the metal structure to avoid the failure of soil cover above a soil-steel bridge. The effects of spans larger than 8 m or more stiffened panels due to railway loads that maintain a safe railway track have not been accounted for in the minimum cover formulas and are the subject of this paper. For this study, two-dimensional finite element (FE) analyses of four low-profile arches and four box culverts with spans larger than 8 m were performed to develop new patterns for the minimum depth of soil cover by considering the serviceability criterion of the railway track. Using the least-squares method, new formulas were then developed for low-profile arches and box culverts and were compared with Canadian Highway Bridge Design Code formulas. Finally, a series of three-dimensional (3D) finite element FE analyses were carried out to control the out-of-plane buckling in the steel plates due to the 3D pattern of train loads. The results show that the out-of-plane bending does not control the buckling behavior of the steel plates, so the proposed equations for minimum depth of cover can be appropriately used for practical purposes.

  4. Post-tensioning and splicing of precast/prestressed bridge beams to extend spans

    NASA Astrophysics Data System (ADS)

    Collett, Brandon S.; Saliba, Joseph E.

    2002-06-01

    This paper explores the status and techniques of post-tensioning and splicing precast concrete I-beams in bridge applications. It will look at the current practices that have been used in the United States and comment on the advantages of these techniques. Representative projects are presented to demonstrate the application and success of specific methods used. To demonstrate the benefits of using post-tensioning and splicing to extend spans, multiple analysis of simple span post-tensioned I-beams were performed varying such characteristics as beam spacing, beam sections, beam depth and concrete strength. Tables were then developed to compare the maximum span length of a prestressed I-beam versus a one segment or a spliced three segment post-tensioned I-beam. The lateral stability of the beam during fabrication, transportation and erection is also examined and discussed. These tables are intended to aid designers and owners in preliminary project studies to determine if post-tensioning can be beneficial to their situation. AASHTO Standard Specifications(2) will be used as basic guidelines and specifications. In many cases, post-tensioning was found to extend the maximum span length of a typical 72-inch precast I-beam more than 40 feet over conventional prestress.

  5. Accessing Data Resources in the Mouse Phenome Database for Genetic Analysis of Murine Life Span and Health Span

    PubMed Central

    Peters, Luanne L.; Paigen, Beverly; Korstanje, Ron; Yuan, Rong; Ackert-Bicknell, Cheryl; Grubb, Stephen C.; Churchill, Gary A.; Chesler, Elissa J.

    2016-01-01

    Understanding the source of genetic variation in aging and using this variation to define the molecular mechanisms of healthy aging require deep and broad quantification of a host of physiological, morphological, and behavioral endpoints. The murine model is a powerful system in which to understand the relations across age-related phenotypes and to identify research models with variation in life span and health span. The Jackson Laboratory Nathan Shock Center of Excellence in the Basic Biology of Aging has performed broad characterization of aging in genetically diverse laboratory mice and has placed these data, along with data from several other major aging initiatives, into the interactive Mouse Phenome Database. The data may be accessed and analyzed by researchers interested in finding mouse models for specific aging processes, age-related health and disease states, and for genetic analysis of aging variation and trait covariation. We expect that by placing these data in the hands of the aging community that there will be (a) accelerated genetic analyses of aging processes, (b) discovery of genetic loci regulating life span, (c) identification of compelling correlations between life span and susceptibility for age-related disorders, and (d) discovery of concordant genomic loci influencing life span and aging phenotypes between mouse and humans. PMID:25533306

  6. 12. View west of access bridge to top of filtration ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    12. View west of access bridge to top of filtration bed building. - Lake Whitney Water Filtration Plant, Filtration Plant, South side of Armory Street between Edgehill Road & Whitney Avenue, Hamden, New Haven County, CT

  7. Buffeting response of long-span cable-supported bridges under skew winds. Part 2: case study

    NASA Astrophysics Data System (ADS)

    Xu, Y. L.; Zhu, L. D.

    2005-03-01

    The finite-element-based framework for buffeting analysis of long-span cable-supported bridges under skew winds has been presented in Part 1 of this paper. The framework is now applied to the Tsing Ma Suspension Bridge in Hong Kong as a case study. The wind velocities and bridge responses measured by the Wind and Structural Health Monitoring System (WASHMS) of the bridge during Typhoon Sam in 1999 are first analyzed to find the skew wind characteristics surrounding the bridge, the modal damping ratios and acceleration responses of the bridge. The buffeting responses of the bridge under skew winds during Typhoon Sam are then computed using the wind characteristics and modal damping ratios measured from the field and the aerodynamic coefficients and flutter derivatives of the bridge deck and tower measured from the wind tunnel under skew winds. The computed acceleration responses of the bridge deck and cable are finally compared with the responses measured from the field. The comparison is found to be satisfactory in general and the case study forms a good practical demonstration for the verification of the proposed method for buffeting analysis of long-span cable-supported bridges under skew winds.

  8. Geometry control of long-span continuous girder concrete bridge during construction through finite element model updating

    NASA Astrophysics Data System (ADS)

    Wu, Jie; Yan, Quan-sheng; Li, Jian; Hu, Min-yi

    2016-04-01

    In bridge construction, geometry control is critical to ensure that the final constructed bridge has the consistent shape as design. A common method is by predicting the deflections of the bridge during each construction phase through the associated finite element models. Therefore, the cambers of the bridge during different construction phases can be determined beforehand. These finite element models are mostly based on the design drawings and nominal material properties. However, the accuracy of these bridge models can be large due to significant uncertainties of the actual properties of the materials used in construction. Therefore, the predicted cambers may not be accurate to ensure agreement of bridge geometry with design, especially for long-span bridges. In this paper, an improved geometry control method is described, which incorporates finite element (FE) model updating during the construction process based on measured bridge deflections. A method based on the Kriging model and Latin hypercube sampling is proposed to perform the FE model updating due to its simplicity and efficiency. The proposed method has been applied to a long-span continuous girder concrete bridge during its construction. Results show that the method is effective in reducing construction error and ensuring the accuracy of the geometry of the final constructed bridge.

  9. A smart model of a long-span suspended bridge for wind tunnel tests

    NASA Astrophysics Data System (ADS)

    Cinquemani, S.; Diana, G.; Fossati, L.; Ripamonti, F.

    2015-04-01

    Traditional aeroelastic models rely only on good mechanical design and accurate crafting in order to match the required structural properties. This paper proposes an active regulation of their structural parameters in order to improve accuracy and reliability of wind tunnel tests. Following the design process steps typical of a smart structure, a damping tuning technique allowing to control a specific set of vibration modes is developed and applied on the aeroelastic model of a long-span suspended bridge. Depending on the testing conditions, the structural damping value can be adjusted in a fast, precise and repeatable way in order to highlight the effects of the aerodynamic phenomena of interest. In particular, vortex-induced vibration are taken into consideration, and the response of a bridge section to vortex shedding is assessed. The active parameter regulation allows to widen the pattern of operating conditions in which the model can be tested. The paper discusses the choice of both sensors and actuators to be embedded in the structure and their positioning, as the control algorithm to obtain the desired damping. Experimental results are shown and results are discussed to evaluate the performance of the smart structure in wind dunnel tests.

  10. A Simple Analytical Approach to the Aeroelastic Stability Problem of Long-Span Cable-Stayed Bridges

    NASA Astrophysics Data System (ADS)

    Vairo, Giuseppe

    2010-01-01

    This paper deals with the aeroelastic stability problem of long-span cable-stayed bridges under an approaching crosswind flow. Starting from a continuous model of the fan-shaped bridge scheme with both H- or A-shaped towers, critical states of the coupled wind-structure system are identified by means of a variational formulation, accounting for torsional and flexural (vertical and lateral) bridge oscillations. The overall bridge dynamics is described by introducing simple mechanical systems with equivalent stiffness properties and, under the assumption of a prevailing truss-like bridge behavior, analytical estimates for dominant stiffness contributions are proposed. Several case studies are discussed and comparisons with experimental evidences as well as with available analytical and numerical results are presented. The proposed simplified approach proves to be consistent and effective for successfully capturing the main wind-bridge interaction mechanisms, and it could be considered as a useful engineering tool for the aeroelastic stability analysis of long-span cable-stayed bridges.

  11. Structural observation of long-span suspension bridges for safety assessment: implementation of an optical displacement measurement system

    NASA Astrophysics Data System (ADS)

    Lages Martins, L.; Rebordão, J. M.; Silva Ribeiro, A.

    2015-02-01

    This paper addresses the implementation of an optical displacement measurement system in the observation scenario of a long-span suspension bridge and its contribution for structural safety assessment. The metrological background required for quality assurance of the measurements is described, namely, the system's intrinsic parameterization and integration in the SI dimensional traceability chain by calibration, including its measurement uncertainty assessment.

  12. 2. View east of filtration bed building. Access bridge to ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    2. View east of filtration bed building. Access bridge to earth covering over reinforced concrete roof is at center right of photograph. - Lake Whitney Water Filtration Plant, Filtration Plant, South side of Armory Street between Edgehill Road & Whitney Avenue, Hamden, New Haven County, CT

  13. Topographic effects on seismic response of long-span rigid-frame bridge under SV seismic wave

    NASA Astrophysics Data System (ADS)

    Wang, Lei; Zhao, Cheng-Gang; Qu, Tie-Jun

    2008-05-01

    Seismic ground motions of two neighboring mountains and the free surface between them are calculated under the SV seismic waves with three different incident angles. The results are then taken as the inputs of multi-point seismic excitations for the foundation of a long-span bridge built over the valley in the analysis considering the integrated influence of traveling wave and topography. On the basis of a dynamic analytical method, a finite element model is created for the seismic responses of a four-span rigid-frame bridge of 440 m. The pier-top displacement and the pier-bottom internal force of the bridge are calculated. Then the results are compared with those considering traveling-wave effect only. The conclusions can serve as a seismic design reference for the structures located on the complex mountain topography.

  14. Accessing IceBridge Data Products - The OIB Portal

    NASA Astrophysics Data System (ADS)

    Tanner, S.; Oldenburg, J.; Collins, J. A.; Lewis, S.; Schaffer, F.

    2013-12-01

    NASA's Operation IceBridge mission both collects and makes available airborne remote sensing measurements over the polar regions to bridge the gap between NASA's Ice, Cloud and Land Elevation satellite (ICESat) mission and the upcoming ICESat-2 mission in 2016. The flight paths are carefully chosen areas of scientific interest, and the diverse set of instruments aboard each flight provide a more robust and thorough set of measurements than can satellite-based sensors. Instruments currently in use gather data on ice and snow thickness, bedrock topography, high-resolution photography, and other scientific properties. Shortly after collection, the data are transferred to the National Snow and Ice Data Center (NSIDC) for permanent storage and free, public access. At NSIDC, the data are organized with detailed metadata and made available through several avenues. The primary point of access for IceBridge data is the IceBridge Data Portal, located at http://nsidc.org/icebridge/portal/. This data portal allows users to both quickly find data that they seek or just peruse the available data holdings through the user interface. Ease of use is a top priority in the portal development to allow the user to concentrate on the science behind the data instead of how to navigate the website. Past development of the portal has focused on clarity of data presentation and access to the data itself. Current and planned development will see substantial additions to the filtering options, navigational tools, and visualization capabilities. Metadata are heavily relied upon to drive the data organization and access at NSIDC, particularly in the IceBridge Data Portal. The Portal's interactive maps of the polar regions allow users to search for data geographically. A user may also see how data at a specific location change over time using the Portal's temporal filters. In addition, the IceBridge flights themselves are searchable if a user is looking for data from a specific instrument

  15. Health Monitoring and Evaluation of Long-Span Bridges Based on Sensing and Data Analysis: A Survey.

    PubMed

    Zhou, Jianting; Li, Xiaogang; Xia, Runchuan; Yang, Jun; Zhang, Hong

    2017-03-16

    Aimed at the health monitoring and evaluation of bridges based on sensing technology, the monitoring contents of different structural types of long-span bridges were defined. Then, the definition, classification, selection principle, and installation requirements of the sensors were summarized. The concept was proposed that new adaptable long-life sensors could be developed by new theories and new effects. The principle and methods to select controlled sections and optimize the layout design of measuring points were illustrated. The functional requirements were elaborated on about the acquisition, transmission, processing, and management of sensing information. Some advanced concepts about the method of bridge safety evaluation were demonstrated and technology bottlenecks in the current safety evaluation were also put forward. Ultimately, combined with engineering practices, an application was carried out. The results showed that new, intelligent, and reliable sensor technology would be one of the main future development directions in the long-span bridge health monitoring and evaluation field. Also, it was imperative to optimize the design of the health monitoring system and realize its standardization. Moreover, it is a heavy responsibility to explore new thoughts and new concepts regarding practical bridge safety and evaluation technology.

  16. Health Monitoring and Evaluation of Long-Span Bridges Based on Sensing and Data Analysis: A Survey

    PubMed Central

    Zhou, Jianting; Li, Xiaogang; Xia, Runchuan; Yang, Jun; Zhang, Hong

    2017-01-01

    Aimed at the health monitoring and evaluation of bridges based on sensing technology, the monitoring contents of different structural types of long-span bridges were defined. Then, the definition, classification, selection principle, and installation requirements of the sensors were summarized. The concept was proposed that new adaptable long-life sensors could be developed by new theories and new effects. The principle and methods to select controlled sections and optimize the layout design of measuring points were illustrated. The functional requirements were elaborated on about the acquisition, transmission, processing, and management of sensing information. Some advanced concepts about the method of bridge safety evaluation were demonstrated and technology bottlenecks in the current safety evaluation were also put forward. Ultimately, combined with engineering practices, an application was carried out. The results showed that new, intelligent, and reliable sensor technology would be one of the main future development directions in the long-span bridge health monitoring and evaluation field. Also, it was imperative to optimize the design of the health monitoring system and realize its standardization. Moreover, it is a heavy responsibility to explore new thoughts and new concepts regarding practical bridge safety and evaluation technology. PMID:28300785

  17. 2. View northeast. South elevation Westminster span, link span, ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    2. View northeast. South elevation - Westminster span, link span, Walpole span. - Walpole-Westminster Bridge, Spanning Connecticut River between Walpole, NH & Westminster, VT, Walpole, Cheshire County, NH

  18. 1. View south. North elevation Walpole span, link span, ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    1. View south. North elevation - Walpole span, link span, and Westminster span. - Walpole-Westminster Bridge, Spanning Connecticut River between Walpole, NH & Westminster, VT, Walpole, Cheshire County, NH

  19. Numerical simulation of aerodynamic derivatives and critical wind speed for long-span bridges based on simplified steady wind field

    NASA Astrophysics Data System (ADS)

    Xin, Dabo; Ou, Jinping

    2007-06-01

    Combining the computational fluid dynamics-based numerical simulation with the forced vibration technique for extraction of aerodynamic derivatives, an approach for calculating the aerodynamic derivatives and the critical flutter wind speed for long-span bridges is presented in this paper. The RNG k-ɛ turbulent model is introduced to establish the governing equations, including the continuity equation and the Navier-Stokes equations, for solving the wind flow field around a two-dimensional bridge section. To illustrate the effectiveness and accuracy of the proposed approach, a simple application to the Hume Bridge in China is provided, and the numerical results show that the aerodynamic derivatives and the critical flutter wind speed obtained agree well with the wind tunnel test results.

  20. Deck and Cable Dynamic Testing of a Single-span Bridge Using Radar Interferometry and Videometry Measurements

    NASA Astrophysics Data System (ADS)

    Piniotis, George; Gikas, Vassilis; Mpimis, Thanassis; Perakis, Harris

    2016-03-01

    This paper presents the dynamic testing of a roadway, single-span, cable-stayed bridge for a sequence of static load and ambient vibration monitoring scenarios. Deck movements were captured along both sideways of the bridge using a Digital Image Correlation (DIC) and a Ground-based Microwave Interfererometer (GBMI) system. Cable vibrations were measured at a single point location on each of the six cables using the GBMI technique. Dynamic testing involves three types of analyses; firstly, vibration analysis and modal parameter estimation (i. e., natural frequencies and modal shapes) of the deck using the combined DIC and GBMI measurements. Secondly, dynamic testing of the cables is performed through vibration analysis and experimental computation of their tension forces. Thirdly, the mechanism of cable-deck dynamic interaction is studied through their Power Spectra Density (PSD) and the Short Time Fourier Transform (STFT) analyses. Thereby, the global (deck and cable) and local (either deck or cable) bridge modes are identified, serving a concrete benchmark of the current state of the bridge for studying the evolution of its structural performance in the future. The level of synergy and complementarity between the GBMI and DIC techniques for bridge monitoring is also examined and assessed.

  1. Supporting knowledge translation through collaborative translational research initiatives: 'bridging' versus 'blurring' boundary-spanning approaches in the UK CLAHRC initiative.

    PubMed

    Evans, Sarah; Scarbrough, Harry

    2014-04-01

    Recent policy initiatives in the UK and internationally have sought to promote knowledge translation between the 'producers' and 'users' of research. Within this paper we explore how boundary-spanning interventions used within such initiatives can support knowledge translation between diverse groups. Using qualitative data from a 3-year research study conducted from January 2010 to December 2012 of two case-sites drawn from the CLAHRC initiative in the UK, we distinguish two different approaches to supporting knowledge translation; a 'bridging' approach that involves designated roles, discrete events and activities to span the boundaries between communities, and a 'blurring' approach that de-emphasises the boundaries between groups, enabling a more continuous process of knowledge translation as part of day-to-day work-practices. In this paper, we identify and differentiate these boundary-spanning approaches and describe how they emerged from the context defined by the wider CLAHRC networks. This highlights the need to develop a more contextualised analysis of the boundary-spanning that underpins knowledge translation processes, relating this to the distinctive features of a particular case.

  2. IceBridge Data Management and Access Strategies at NSIDC

    NASA Astrophysics Data System (ADS)

    Oldenburg, J.; Tanner, S.; Collins, J. A.; Lewis, S.; FitzGerrell, A.

    2013-12-01

    NASA's Operation IceBridge (OIB) mission, initiated in 2009, collects airborne remote sensing measurements over the polar regions to bridge the gap between NASA's Ice, Cloud and Land Elevation satellite (ICESat) mission and the upcoming ICESat-2 mission in 2016. OIB combines an evolving mix of instruments to gather data on topography, ice and snow thickness, high-resolution photography, and other properties that are more difficult or impossible to measure via satellite. Once collected, these data are stored and made available at the National Snow and Ice Data Center (NSIDC) in Boulder, Colorado. To date, there are nearly 90 terabytes of data available, and there are about three more years of data collection left. The main challenges faced in data management at NSIDC are derived from the quantity and heterogeneity of the data. To deal with the quantity of data, the technical teams at NSIDC have significantly automated the data ingest, metadata generation, and other required data management steps. Heterogeneity of data and the evolution of the Operation over time make technical automation complex. To limit complexity, the IceBridge team has agreed to such practices as using specific data file formats, limiting file sizes, using specific filename templates, etc. These agreements evolve as Operation IceBridge moves forward. The metadata generated about the flights and the data collected thereon make the storage of the data more robust, and enable data discoverability. With so much metadata, users can search the vast collection with ease using specific parameters about the data they seek. An example of this in action is the IceBridge data portal developed at NSIDC, http://nsidc.org/icebridge/portal/. This portal uses the GPS data from the flights projected onto maps as well as other flight and instrument metadata to help the user find the exact data file they seek. This implementation is only possible with dependable data management beneath the surface. The data files

  3. Conductive bridging random access memory—materials, devices and applications

    NASA Astrophysics Data System (ADS)

    Kozicki, Michael N.; Barnaby, Hugh J.

    2016-11-01

    We present a review and primer on the subject of conductive bridging random access memory (CBRAM), a metal ion-based resistive switching technology, in the context of current research and the near-term requirements of the electronics industry in ultra-low energy devices and new computing paradigms. We include extensive discussions of the materials involved, the underlying physics and electrochemistry, the critical roles of ion transport and electrode reactions in conducting filament formation and device switching, and the electrical characteristics of the devices. Two general cation material systems are given—a fast ion chacogenide electrolyte and a lower ion mobility oxide ion conductor, and numerical examples are offered to enhance understanding of the operation of devices based on these. The effect of device conditioning on the activation energy for ion transport and consequent switching speed is discussed, as well as the mechanisms involved in the removal of the conducting bridge. The morphology of the filament and how this could be influenced by the solid electrolyte structure is described, and the electrical characteristics of filaments with atomic-scale constrictions are discussed. Consideration is also given to the thermal and mechanical environments within the devices. Finite element and compact modelling illustrations are given and aspects of CBRAM storage elements in memory circuits and arrays are included. Considerable emphasis is placed on the effects of ionizing radiation on CBRAM since this is important in various high reliability applications, and the potential uses of the devices in reconfigurable logic and neuromorphic systems is also discussed.

  4. Extended Lattice Boltzmann Method with Application to Predict Aerodynamic Loads of Long Span Bridge

    NASA Astrophysics Data System (ADS)

    Liu, Tiancheng; Liu, Gao; Li, Yi; Ge, Yaojun

    2010-05-01

    The lattice Boltzmann (LB) method, a new conceptual approach to solve the fluid dynamics problem, is presented at first. The turbulence model is incorporated into the normal LB equation to simulate turbulence flow in the form of turbulence relaxation time determined by the nonequilibrium particle distribution function and Smagorinsky model. The total relaxation time is defined as the contribution of molecule viscosity and turbulence eddy viscosity. The aerodynamic forces on bridge girders are predicted by present LB method and the analysis of flow state is performed. The validity of LB method is verified through comparing the present results with the available experimental data and those obtained from the solutions of Navier-Stockes equation like Reynolds averaged Navier-Stokes (RANS) and discrete vortex method (DVM).

  5. a Method for the Extraction of Long-Term Deformation Characteristics of Long-Span High-Speed Railway Bridges Using High-Resolution SAR Images

    NASA Astrophysics Data System (ADS)

    Jia, H. G.; Liu, L. Y.

    2016-06-01

    Natural causes and high-speed train load will result in the structural deformation of long-span bridges, which greatly influence the safety operation of high-speed railway. Hence it is necessary to conduct the deformation monitoring and regular status assessment for long-span bridges. However for some traditional surveying technique, e.g. control-point-based surveying techniques, a lot of human and material resources are needed to perform the long-term monitoring for the whole bridge. In this study we detected the long-term bridge deformation time-series by persistent scatterer interferometric synthetic aperture radar (PSInSAR) technique using the high-resolution SAR images and external digital elevation model. A test area in Nanjing city in China is chosen and TerraSAR-X images and Tandem-X for this area have been used. There is the Dashengguan bridge in high speed railway in this area as study object to evaluate this method. Experiment results indicate that the proposed method can effectively extract the long-term deformation of long-span high-speed railway bridge with higher accuracy.

  6. EarthCube - Earth System Bridge: Spanning Scientific Communities with Interoperable Modeling Frameworks

    NASA Astrophysics Data System (ADS)

    Peckham, S. D.; DeLuca, C.; Gochis, D. J.; Arrigo, J.; Kelbert, A.; Choi, E.; Dunlap, R.

    2014-12-01

    In order to better understand and predict environmental hazards of weather/climate, ecology and deep earth processes, geoscientists develop and use physics-based computational models. These models are used widely both in academic and federal communities. Because of the large effort required to develop and test models, there is widespread interest in component-based modeling, which promotes model reuse and simplified coupling to tackle problems that often cross discipline boundaries. In component-based modeling, the goal is to make relatively small changes to models that make it easy to reuse them as "plug-and-play" components. Sophisticated modeling frameworks exist to rapidly couple these components to create new composite models. They allow component models to exchange variables while accommodating different programming languages, computational grids, time-stepping schemes, variable names and units. Modeling frameworks have arisen in many modeling communities. CSDMS (Community Surface Dynamics Modeling System) serves the academic earth surface process dynamics community, while ESMF (Earth System Modeling Framework) serves many federal Earth system modeling projects. Others exist in both the academic and federal domains and each satisfies design criteria that are determined by the community they serve. While they may use different interface standards or semantic mediation strategies, they share fundamental similarities. The purpose of the Earth System Bridge project is to develop mechanisms for interoperability between modeling frameworks, such as the ability to share a model or service component. This project has three main goals: (1) Develop a Framework Description Language (ES-FDL) that allows modeling frameworks to be described in a standard way so that their differences and similarities can be assessed. (2) Demonstrate that if a model is augmented with a framework-agnostic Basic Model Interface (BMI), then simple, universal adapters can go from BMI to a

  7. Three Bridge Fryer's Ford Bridge, Nimrod Bridge, and Ward's ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    Three Bridge - Fryer's Ford Bridge, Nimrod Bridge, and Ward's Crossing Bridge - Fryer's Ford Bridge, Spanning East Fork of Point Remove Creek at Fryer Bridge Road (CR 67), Solgohachia, Conway County, AR

  8. 4. View northwest. South elevation Walpole span, link span, ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    4. View northwest. South elevation - Walpole span, link span, and Westminster span. Structure on east pier is stream level gauge station. - Walpole-Westminster Bridge, Spanning Connecticut River between Walpole, NH & Westminster, VT, Walpole, Cheshire County, NH

  9. Students' Perceptions of a University Access (Bridging) Programme for Social Science, Commerce and Humanities: Research Article

    ERIC Educational Resources Information Center

    Quayle, Michael; Essack, Zaynab

    2007-01-01

    Universities in South Africa face the challenge of redressing past (and continuing) inequalities in higher education by increasing accessibility to previously (and currently) disadvantaged students. One means of doing so is through 'access' or 'bridging' programmes. This article explores successful students' perceptions of one such programme at…

  10. Hyperlink Format, Categorization Abilities and Memory Span as Contributors to Deaf Users Hypertext Access

    ERIC Educational Resources Information Center

    Farjardo, Inmaculada; Arfe, Barbara; Benedetti, Patrizia; Altoe, Gianmarco

    2008-01-01

    Sixty deaf and hearing students were asked to search for goods in a Hypertext Supermarket with either graphical or textual links of high typicality, frequency, and familiarity. Additionally, they performed a picture and word categorization task and two working memory span tasks (spatial and verbal). Results showed that deaf students were faster in…

  11. EAST END FROM MID SPAN OF EASTERN SPAN (THREE DIFFERENT ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    EAST END FROM MID SPAN OF EASTERN SPAN (THREE DIFFERENT TRUSSES, EAST SOUTHEAST 110 DEGREES) - Honey Run Bridge, Spanning Butte Creek, bypassed section of Honey Run Road (originally Carr Hill Road), Paradise, Butte County, CA

  12. 4. From Skew Span to portal on span 1 looking ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    4. From Skew Span to portal on span 1 looking up grade toward the south end. - Monongahela Connecting Railroad Company, Hot Metal Bridge, Spanning Monongahela River at mile post 3.1, Pittsburgh, Allegheny County, PA

  13. Hyperlink format, categorization abilities and memory span as contributors to deaf users hypertext access.

    PubMed

    Fajardo, Inmaculada; Farjardo, Inmaculada; Arfé, Barbara; Benedetti, Patrizia; Altoé, Gianmarco

    2008-01-01

    Sixty deaf and hearing students were asked to search for goods in a Hypertext Supermarket with either graphical or textual links of high typicality, frequency, and familiarity. Additionally, they performed a picture and word categorization task and two working memory span tasks (spatial and verbal). Results showed that deaf students were faster in graphical than in verbal hypertext when the number of visited pages per search trial was blocked. Regardless of stimuli format, accuracy differences between groups did not appear, although deaf students were slower than hearing students in both Web search and categorization tasks (graphical or verbal). No relation between the two tasks was found. Correlation analyses showed that deaf students with higher spatial span were faster in graphical Web search, but no correlations emerged between verbal span and verbal Web search. A hypothesis of different strategies used by the two groups for searching information in hypertext is formulated. It is suggested that deaf users use a visual-matching strategy more than a semantic approach to make navigation decisions.

  14. Financial Aid: A Broken Bridge to College Access?

    ERIC Educational Resources Information Center

    Long, Bridget Terry; Riley, Erin

    2007-01-01

    In this article, Bridget Terry Long and Erin Riley argue that in recent years, U.S. financial aid policy has shifted its emphasis from expanding college access for low-income students toward defraying the costs for middle- and upper-income families. They explain how loans, merit-based aid, and education tax breaks are increasingly replacing…

  15. 17. Long distance view looking NW towards Manhattan showing access ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    17. Long distance view looking NW towards Manhattan showing access ramps to bridge. Jet Lowe, photographer, 1982. - Brooklyn Bridge, Spanning East River between Park Row, Manhattan and Sands Street, Brooklyn, New York County, NY

  16. The random field model of the spatial distribution of heavy vehicle loads on long-span bridges

    NASA Astrophysics Data System (ADS)

    Chen, Zhicheng; Bao, Yuequan; Li, Hui

    2016-04-01

    A stochastic model based on Markov random field is proposed to model the spatial distribution of vehicle loads on longspan bridges. The bridge deck is divided into a finite set of discrete grid cells, each cell has two states according to whether the cell is occupied by the heavy vehicle load or not, then a four-neighbor lattice-structured undirected graphical model with each node corresponding to a cell state variable is proposed to model the location distribution of heavy vehicle loads on the bridge deck. The node potential is defined to quantitatively describe the randomness of node state, and the edge potential is defined to quantitatively describe the correlation of the connected node pair. The junction tree algorithm is employed to obtain the systematic solutions of inference problems of the graphical model. A marked random variable is assigned to each node to represent the amplitude of the total weight of vehicle applied on the corresponding cell of the bridge deck. The rationality of the model is validated by a Monte Carlo simulation of a learned model based on monitored data of a cable-stayed bridge.

  17. Health monitoring data analysis and comparison of prototype and laboratorial model for long-span cable-stayed bridge

    NASA Astrophysics Data System (ADS)

    Yang, Ou; Ou, Jinping

    2009-03-01

    Since 2004, Shandong Binzhou Yellow River highway bridge health monitoring (SHM) system has started to operate. Abundance data has been acquired during these years. To make full use of these data, a 1/40 scale laboratorial model has been built based on the design information of Shandong Binzhou Yellow River highway bridge. And a health monitoring system of the laboratorial model, which included loading system, local response monitoring subsystem and global response monitoring subsystem, has been designed and implemented. The dynamic performance of bridge model and prototype has been compared and the error analysis has been provided also. The numeric simulation of cable damage localization utilizing damage location vectors (DLVs) has been demonstrated. And the results indicated that using DLVs to localize the cable damage is feasible and accurate. The goal of these efforts is to utilize the convenience of the laboratorial environment to obtain the structural information in ideal state which is hard to get in field.

  18. Field Testing and Load Rating Report for Bridge No. 4, Hybrid Composite Beam Span, at Fort Knox, Kentucky

    DTIC Science & Technology

    2016-09-01

    restraint induced by friction in the elastomeric bearing pads. The heavier loads applied in 2013 generated a larger friction resistance and therefore...plans, the HCB span has an overall width of 27’- 8”and a span length of approximately 39’ (center-to-center of bearing ). It should be noted that BDI...at midspan (typical of both test phases). Figure 1.4 –Tiltmeter rotation sensor on HCB near pier beam bearing (typical of both test phases

  19. 77 FR 35900 - Safety Zone; Gilmerton Bridge Center Span Float-in, Elizabeth River; Norfolk, Portsmouth, and...

    Federal Register 2010, 2011, 2012, 2013, 2014

    2012-06-15

    ...Rulemaking Portal: http://www.regulations.gov . (2) Fax: 202-493-2251. (3) Mail: Docket Management Facility... Management Facility. 3. Privacy Act Anyone can search the electronic form of comments received into any of... the Eastern Branch of the Elizabeth River at the Campostella Bridge to the Southern Branch of...

  20. 77 FR 75016 - Safety Zone: Gilmerton Bridge Center Span Float-in, Elizabeth River; Norfolk, Portsmouth, and...

    Federal Register 2010, 2011, 2012, 2013, 2014

    2012-12-19

    ... center span barge. Inadvertently, this rule included an error in the inclement weather date of the safety... January 11, 2013, with inclement weather dates of January 12, 2013 through January 16, 2013. ADDRESSES... 11, 2013, with inclement weather dates of January 12, 2013 through January 16, 2013. However, due...

  1. FIXED END OF MIDDLE SPAN. WESTERN SIDE SHOWING WELDING OF ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    FIXED END OF MIDDLE SPAN. WESTERN SIDE SHOWING WELDING OF TOP PLATE ADDED TO STRENGTHEN THE BRIDGE. - Spile Bridge Road Bridge, Spanning Black Lake Outlie at Spile Bridge Road, Oswegatchie, St. Lawrence County, NY

  2. The IRIS Data Management Center: Enabling Access to Observational Time Series Spanning Decades

    NASA Astrophysics Data System (ADS)

    Ahern, T.; Benson, R.; Trabant, C.

    2009-04-01

    are of acceptably high quality. The formats and data structures used by the seismological community are esoteric. IRIS and its FDSN partners are developing web services that can transform the data holdings to structures that are more easily used by broader scientific communities. For instance, atmospheric scientists are interested in using global observations of microbarograph data but that community does not understand the methods of applying instrument corrections to the observations. Web processing services under development at IRIS will transform these data in a manner that allows direct use within such analysis tools as MATLAB® already in use by that community. By continuing to develop web-service based methods of data discovery and access, IRIS is enabling broader access to its data holdings. We currently support data discovery using many of the Open Geospatial Consortium (OGC) web mapping services. We are involved in portal technologies to support data discovery and distribution for all data from the EarthScope project. We are working with computer scientists at several universities including the University of Washington as part of a DataNet proposal and we intend to enhance metadata, further develop ontologies, develop a Registry Service to aid in the discovery of data sets and services, and in general improve the semantic interoperability of the data managed at the IRIS DMC. Finally IRIS has been identified as one of four scientific organizations that the External Research Division of Microsoft wants to work with in the development of web services and specifically with the development of a scientific workflow engine. More specific details of current and future developments at the IRIS DMC will be included in this presentation.

  3. The Rainbow Bridge Metaphor as a Tool for Developing Accessible E-Learning Practices in Higher Education

    ERIC Educational Resources Information Center

    Seale, Jane K.

    2006-01-01

    This paper explores the extent to which existing accessibility metaphors can help to develop our conceptualizations of accessible e-­learning practice in higher education and outlines a proposal for a new rainbow bridge metaphor for accessible e­-learning practice. The need for a metaphor that reflects in more depth what we are beginning to…

  4. 16. Overall view of the swing span (Span G) turning ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    16. Overall view of the swing span (Span G) turning drum, showing rollers and drive chains; looking W. (Ceronie) - Rock Island Arsenal, Rock Island Bridge, Fort Armstrong Avenue, Rock Island, Rock Island County, IL

  5. A new laterally conductive bridge random access memory by fully CMOS logic compatible process

    NASA Astrophysics Data System (ADS)

    Hsieh, Min-Che; Chin, Yung-Wen; Lin, Yu-Cheng; Chih, Yu-Der; Tsai, Kan-Hsueh; Tsai, Ming-Jinn; King, Ya-Chin; Lin, Chrong Jung

    2014-01-01

    This paper proposes a novel laterally conductive bridge random access memory (L-CBRAM) module using a fully CMOS logic compatible process. A contact buffer layer between the poly-Si and contact plug enables the lateral Ti-based atomic layer to provide on/off resistance ratio via bipolar operations. The proposed device reached more than 100 pulse cycles with an on/off ratio over 10 and very stable data retention under high temperature operations. These results make this Ti-based L-CBRAM cell a promising solution for advanced embedded multi-time programmable (MTP) memory applications.

  6. 7. View of Clark Fork Vehicle Bridge facing northwest. Bridge ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    7. View of Clark Fork Vehicle Bridge facing northwest. Bridge from south shore of Clark Fork River showing 4 1/2 spans. - Clark Fork Vehicle Bridge, Spanning Clark Fork River, serves Highway 200, Clark Fork, Bonner County, ID

  7. 4. View of Clark Fork Vehicle Bridge facing northeast. Bridge ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    4. View of Clark Fork Vehicle Bridge facing northeast. Bridge from south shoreof Clark Fork River showing 4 spans. - Clark Fork Vehicle Bridge, Spanning Clark Fork River, serves Highway 200, Clark Fork, Bonner County, ID

  8. 2. View of Clark Fork Vehicle Bridge facing northeast. Bridge ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    2. View of Clark Fork Vehicle Bridge facing northeast. Bridge from south shore of Clark Fork River showing 4 1/2 spans. - Clark Fork Vehicle Bridge, Spanning Clark Fork River, serves Highway 200, Clark Fork, Bonner County, ID

  9. 5. LOOKING SOUTHEAST, VIEW OF CENTER TURN SPAN AND SOUTHWESTERNMOST ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    5. LOOKING SOUTHEAST, VIEW OF CENTER TURN SPAN AND SOUTHWESTERNMOST SPAN FROM ADJACENT INTERSTATE 40 BRIDGE - St. Francis River Bridge, Spanning St. Francis River at U.S. Highway 70, Forrest City, St. Francis County, AR

  10. 41. Detail showing meeting of two fixed land span segments, ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    41. Detail showing meeting of two fixed land span segments, bridge land span at left, viaduct at right. VIEW NORTH - Broadway Bridge, Spanning Foundry Street, MBTA Yard, Fort Point Channel, & Lehigh Street, Boston, Suffolk County, MA

  11. SPAN: Astronomy and astrophysics

    NASA Technical Reports Server (NTRS)

    Thomas, Valerie L.; Green, James L.; Warren, Wayne H., Jr.; Lopez-Swafford, Brian

    1987-01-01

    The Space Physics Analysis Network (SPAN) is a multi-mission, correlative data comparison network which links science research and data analysis computers in the U.S., Canada, and Europe. The purpose of this document is to provide Astronomy and Astrophysics scientists, currently reachable on SPAN, with basic information and contacts for access to correlative data bases, star catalogs, and other astrophysic facilities accessible over SPAN.

  12. Parameters analysis for assistant cables of system for transient main cable and catwalk of long-span suspension bridges at construction stages

    NASA Astrophysics Data System (ADS)

    Li, Shengli; Ou, Jinping

    2009-03-01

    On the basis of static, dynamic and transient analysis for the prestressing cable structures, the parameters to control the vibration of the system for transient main cables and catwalk of some long-span suspension bridge at the construction stages with the assistant cables are investigated adopting the method of the finite element considering the geometry nonlinearity. The review and prospect to control vibration with assistant cables are summarized, the finite element modeling of the system for transient main cables and catwalk is established, and the influence of the position of the assistant cables, disposed fashion and the tensile forces upon the critical frequencies of the system for transient main cables and catwalk is researched. At the same time, the effect of the damp and the tensile forces of the assistant cables on the equivalent damping ratio of the system for transient main cables and catwalk inside and outside the plane is studied and the effect to control the vibration of the system is analysed. In the end, the influence of the transformation for the tensile forces about assistant cables upon those of the transient main cables and catwalk is also investigated. Results show that, to increase the critical frequencies of the system, the assistant cables should be laid vertically with the main cables and be located in interim span or between the tower and interim span, and to increase the amount of the assistant cables can increase the critical frequencies ,and to increase the rigidities of the assistant cables can improve the ones of the transient main cables but decrease the anti-torsion ability of the catwalks, and to increase the damp of the assistant cables can improve the vibration of the transient main cables inside and outside the plane but the result is little outside the plane, and in addition the effect of the rigidities of the assistant cables is larger outside the plane but is little inside the plane. The results also show that the

  13. View of approach span and movable span, looking southeast from ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    View of approach span and movable span, looking southeast from navy land. Note that navigational channel exists only on north side of movable span. - Naval Supply Annex Stockton, Daggett Road Bridge, Daggett Road traversing Burns Cut Off, Stockton, San Joaquin County, CA

  14. Controllable quantized conductance for multilevel data storage applications using conductive bridge random access memory.

    PubMed

    Aga, Fekadu Gochole; Woo, Jiyong; Song, Jeonghwan; Park, Jaehyuk; Lim, Seokjae; Sung, Changhyuck; Hwang, Hyunsang

    2017-03-17

    In this paper, we investigate the quantized conduction behavior of conductive bridge random access memory (CBRAM) with varied materials and ramping rates. We report stable and reproducible quantized conductance states with integer multiples of fundamental conductance obtained by optimizing the voltage ramping rate and the Ti-diffusion barrier (DB) at the Cu/HfO2 interface. Owing to controlled diffusion of Cu ions by the Ti-DB and the optimized ramping rate, through which it was possible to control the time delay of Cu ion reduction, more than seven levels of discrete conductance states were clearly observed. Analytical modeling was performed to determine the rate-limiting step in filament growth based on an electrochemical redox reaction. Our understanding of the fundamental mechanisms of quantized conductance behaviors provide a promising future for the multi-bit CBRAM device.

  15. Controllable quantized conductance for multilevel data storage applications using conductive bridge random access memory

    NASA Astrophysics Data System (ADS)

    Gochole Aga, Fekadu; Woo, Jiyong; Song, Jeonghwan; Park, Jaehyuk; Lim, Seokjae; Sung, Changhyuck; Hwang, Hyunsang

    2017-03-01

    In this paper, we investigate the quantized conduction behavior of conductive bridge random access memory (CBRAM) with varied materials and ramping rates. We report stable and reproducible quantized conductance states with integer multiples of fundamental conductance obtained by optimizing the voltage ramping rate and the Ti-diffusion barrier (DB) at the Cu/HfO2 interface. Owing to controlled diffusion of Cu ions by the Ti-DB and the optimized ramping rate, through which it was possible to control the time delay of Cu ion reduction, more than seven levels of discrete conductance states were clearly observed. Analytical modeling was performed to determine the rate-limiting step in filament growth based on an electrochemical redox reaction. Our understanding of the fundamental mechanisms of quantized conductance behaviors provide a promising future for the multi-bit CBRAM device.

  16. Support networks for Chinese older immigrants accessing English health and social care services: the concept of Bridge People.

    PubMed

    Liu, Xiayang; Cook, Glenda; Cattan, Mima

    2017-03-01

    As Chinese immigrants in the United Kingdom age, they experience an increasing need to access health and care services. It has, however, been reported that older Chinese immigrants have difficulties in accessing these services. This study explored the experiences of this population in using health and care services and the strategies that they adopted to address their difficulties. A grounded theory method with a two-staged research design was used. Stage 1 explored the participants' experiences of ageing and use of health and social care services through focus group interviews. Stage 2 investigated the strategies individuals used to support access to and use of services through individual interviews. Forty-four older Chinese people and 15 supporters participated in interviews during August 2011 and May 2013. These older Chinese immigrants were challenged in knowing about and in accessing services. Their difficulties were attributed to language barriers, lack of information and instrumental support, and emotional and cultural issues regarding use of health and care services. Their supporters facilitated access to services and acted as a bridge between the service and the user; therefore, they were given the title 'Bridge People'. Bridge People have different backgrounds: family and friends, public sector workers and staff from community-based Chinese organisations. The defining attributes of these supporters were: bilinguality, bicultural, multifunctionality and accessibility. There is no charge for this support; and the relationship between the Bridge Person and recipient involves trust and influence over decisions regarding use of health and care services. Bridge People should be recognised and identified by health, social care and housing services to promote engagement and use of services by older immigrant Chinese people.

  17. 17. INTAKE PIER, BRIDGE STRESS SHEET, SHEET 8 OF 117, ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    17. INTAKE PIER, BRIDGE STRESS SHEET, SHEET 8 OF 117, 1920. - Sacramento River Water Treatment Plant Intake Pier & Access Bridge, Spanning Sacramento River approximately 175 feet west of eastern levee on river; roughly .5 mile downstream from confluence of Sacramento & American Rivers, Sacramento, Sacramento County, CA

  18. 13. View of Clark Fork Vehicle Bridge facing south. Concrete ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    13. View of Clark Fork Vehicle Bridge facing south. Concrete barrier blocks access. Plaque was originally located where strioed traffic sign is posted at right. - Clark Fork Vehicle Bridge, Spanning Clark Fork River, serves Highway 200, Clark Fork, Bonner County, ID

  19. 14. View of Clark Fork Vehicle Bridge facing north. Approach ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    14. View of Clark Fork Vehicle Bridge facing north. Approach from the south. Concrete barrier blocks access. Plaque was originally located where striped traffic sign is posted at right. - Clark Fork Vehicle Bridge, Spanning Clark Fork River, serves Highway 200, Clark Fork, Bonner County, ID

  20. 3. View west. North elevation Walpole span in foreground, ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    3. View west. North elevation - Walpole span in foreground, link span; Westminster span in background. - Walpole-Westminster Bridge, Spanning Connecticut River between Walpole, NH & Westminster, VT, Walpole, Cheshire County, NH

  1. Suicide by Jumping and Accessibility of Bridges: Results from a National Survey in Switzerland

    ERIC Educational Resources Information Center

    Reisch, Thomas; Schuster, Ursula; Michel, Konrad

    2007-01-01

    Rates of suicide by jumping show large regional differences. Barriers on bridges may prevent suicides but also may lead to a substitution of jumping site or method. The aim of our study was to compare suicide data from regions with and without suicide bridges and to estimate the effects on method and site substitution if bridges were to be…

  2. LODGEPOLE BRIDGE, FACING NORTHWEST Generals Highway, Lodge Pole Bridge, ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    LODGEPOLE BRIDGE, FACING NORTHWEST - Generals Highway, Lodge Pole Bridge, Spanning Marble Fork of Kaweah River, approximately 21 miles northwest of Ash Mountain Entrance, Three Rivers, Tulare County, CA

  3. LODGEPOLE BRIDGE, FACING SOUTHEAST Generals Highway, Lodge Pole Bridge, ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    LODGEPOLE BRIDGE, FACING SOUTHEAST - Generals Highway, Lodge Pole Bridge, Spanning Marble Fork of Kaweah River, approximately 21 miles northwest of Ash Mountain Entrance, Three Rivers, Tulare County, CA

  4. Grade Span.

    ERIC Educational Resources Information Center

    Renchler, Ron

    2000-01-01

    This issue reviews grade span, or grade configuration. Catherine Paglin and Jennifer Fager's "Grade Configuration: Who Goes Where?" provides an overview of issues and concerns related to grade spans and supplies profiles of eight Northwest schools with varying grade spans. David F. Wihry, Theodore Coladarci, and Curtis Meadow's…

  5. Visually storying living with HIV: bridging stressors and supports in accessing care.

    PubMed

    Schrader, S M; Deering, E N; Zahl, D A; Wallace, M

    2011-08-01

    This paper examines how visual narratives may bridge relational understandings between people living with HIV/AIDS (PLWH/A) and future oral health care providers. Borrowing from literature in participatory visual methods such as photo elicitation and photovoice, we explored how PLWH/A visually choose to represent their daily lives. This study uses a grounded theory action-oriented approach in examining the thematic analysis of 257 photos and 12 related reflective participant journals. Ten collaborative themes emerged from the participants' analysis of their photos. These themes of social support, places, family, staff, group, recovery tools, transportation, friends, medications and food exhibited the indivisible characteristics of stressors and supports commonly found in accessing care. Further researcher reflections also found three meta-themes of stigmatization, maintenance of positive mental health and the development of pride in managing one's health. PLWH/A need to share these visual themes of supports and stressors with future dental providers so that they may hopefully acquire an understanding of chronic illness that is more personalized and relationship centered rather than merely numeric and detached.

  6. 25. DETAIL VIEW OF COMMEMORATIVE NAMEPLATE PLAQUE, NORTH END SPAN ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    25. DETAIL VIEW OF COMMEMORATIVE NAMEPLATE PLAQUE, NORTH END SPAN - East Bloomsburg Bridge, Spanning Susquehanna River at Pennsylvania Route 487 (Legislative Route 283), Bloomsburg, Columbia County, PA

  7. 21. Southern approach span plan and elevation views for pier ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    21. Southern approach span plan and elevation views for pier and abutment structural changes required after flood of December 1955 on Moody Bridge. - Moody Bridge, Spanning South Fork Eel River, Garberville, Humboldt County, CA

  8. View of central lift span truss web of Tensaw River ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    View of central lift span truss web of Tensaw River Bridge, showing support girders for life house, looking east - Tensaw River Lift Bridge, Spanning Tensaw River at U.S. Highway 90, Mobile, Mobile County, AL

  9. 31. DETAIL VIEW OF MOVABLE SPAN, UPPER TRUSS GUSSET PLATE, ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    31. DETAIL VIEW OF MOVABLE SPAN, UPPER TRUSS GUSSET PLATE, CONNECTION OF VERTICAL AND HORIZONTAL MEMBERS AT BRIDGE TENDER'S MOUSE (taken in December 1983) - Sharptown Bridge, Spanning Nanticoke River, State Route 313, Sharptown, Wicomico County, MD

  10. View of West end of central lift span truss web ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    View of West end of central lift span truss web of Tensaw River Bridge, showing web brace of lift girder superstructure, looking west - Tensaw River Lift Bridge, Spanning Tensaw River at U.S. Highway 90, Mobile, Mobile County, AL

  11. 21. View of Clark Fork Vehicle Bridge facing west. Looking ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    21. View of Clark Fork Vehicle Bridge facing west. Looking at bridge deck, guard rail, juncture of two bridge spans. - Clark Fork Vehicle Bridge, Spanning Clark Fork River, serves Highway 200, Clark Fork, Bonner County, ID

  12. 1. Claremont Railway Bridge, Main Street Bridge, and Clement and ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    1. Claremont Railway Bridge, Main Street Bridge, and Clement and Rossiter Store in context, looking west - Claremont Railway Bridge, Spanning Sugar River at Claremont Railroad Company Line, Claremont, Sullivan County, NH

  13. GOETHALS BRIDGE FROM NORTH SIDE OVER ARTHUR KILL. RAILROAD BRIDGE ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    GOETHALS BRIDGE FROM NORTH SIDE OVER ARTHUR KILL. RAILROAD BRIDGE IN FOREGROUND - Goethals Bridge, Spanning Arthur Kill from New Jersey to Staten Island, Staten Island (subdivision), Richmond County, NY

  14. 10. DETAIL VIEW OF BRIDGE DATEPLATE WHICH READS 'WISCONSIN BRIDGE ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    10. DETAIL VIEW OF BRIDGE DATEPLATE WHICH READS 'WISCONSIN BRIDGE & IRON COMPANY, MILWAUKEE, WIS., 1933' - St. Francis River Bridge, Spanning St. Francis River at U.S. Highway 70, Forrest City, St. Francis County, AR

  15. 2. LONG VIEW NORTHWEST, EASTBOUND BRIDGE IN FOREGROUND, WESTBOUND BRIDGE ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    2. LONG VIEW NORTHWEST, EASTBOUND BRIDGE IN FOREGROUND, WESTBOUND BRIDGE IN BACKGROUND - Willow Run Expressway Bridge No. R01, Spanning Conrail Railway, eastbound, at US-10, Ypsilanti, Washtenaw County, MI

  16. 3. View of Clark Fork Vehicle Bridge facing southwest. Bridge ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    3. View of Clark Fork Vehicle Bridge facing southwest. Bridge from north shore of Clark Fork River. - Clark Fork Vehicle Bridge, Spanning Clark Fork River, serves Highway 200, Clark Fork, Bonner County, ID

  17. 5. View of Clark Fork Vehicle Bridge facing east. Bridge ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    5. View of Clark Fork Vehicle Bridge facing east. Bridge from south shore of Clark Fork River-southernmost span. 1900-era Northern Pacific Railway Bridge in background. - Clark Fork Vehicle Bridge, Spanning Clark Fork River, serves Highway 200, Clark Fork, Bonner County, ID

  18. 10. DETAIL, SOUTHEAST SPAN THROUGH CANAL, VIEW BLOCKED BY STEEL, ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    10. DETAIL, SOUTHEAST SPAN THROUGH CANAL, VIEW BLOCKED BY STEEL, CLAD COUNTER WEIGHT, WATER SPAN RAISED OUT OF VIEW - Cape Cod Canal Lift Bridge, Spanning Cape Cod Canal, Buzzards Bay, Barnstable County, MA

  19. 26. Central compression lock, north span facing north. Compression lock ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    26. Central compression lock, north span facing north. Compression lock locks two spans together at highest point. There are three compression locks. - Henry Ford Bridge, Spanning Cerritos Channel, Los Angeles-Long Beach Harbor, Los Angeles, Los Angeles County, CA

  20. 20. DETAIL OF WEST ANCHOR SPAN, CANTILEVER ARMS AND WEST ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    20. DETAIL OF WEST ANCHOR SPAN, CANTILEVER ARMS AND WEST HALF OF SUSPENDED SPAN OF THROUGH TRUSS. VIEW TO NORTHEAST. - MacArthur Bridge, Spanning Mississippi River on Highway 34 between IA & IL, Burlington, Des Moines County, IA

  1. 2. Elkmont, deck view of corrugated arched bridge. Great ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    2. Elkmont, deck view of corrugated arched bridge. - Great Smoky Mountains National Park Roads & Bridges, Elkmont Vehicle Bridge, Spanning Little River at Elkmont Campground, Gatlinburg, Sevier County, TN

  2. 3. Elkmont, underside detail of corrugated arched bridge. Great ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    3. Elkmont, underside detail of corrugated arched bridge. - Great Smoky Mountains National Park Roads & Bridges, Elkmont Vehicle Bridge, Spanning Little River at Elkmont Campground, Gatlinburg, Sevier County, TN

  3. SHARP OBLIQUE PERSPECTIVE OF DECK AND APPROACH SPANS ALONG WITH ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    SHARP OBLIQUE PERSPECTIVE OF DECK AND APPROACH SPANS ALONG WITH PRINCIPLE CANTILEVER SPAN SHARP OBLIQUE PERSPECTIVE OF DECK AND APPROACH SPANS ALONG WITH PRINCIPLE CANTILEVER SPAN SHARP OBLIQUE PERSPECTIVE OF DECK AND APPROACH SPANS ALONG WITH PRINCIPLE CANTILEVER SPAN SHARP OBLIQUE PERSPECTIVE OF DECK AND APPROACH SPANS ALONG WITH PRINCIPLE CANTILEVER SPAN SHARP OBLIQUE PERSPECTIVE OF DECK AND APPROACH SPANS ALONG WITH PRINCIPLE CANTILEVER SPAN SHARP OBLIQUE PERSPECTIVE OF DECK AND APPROACH SPANS ALONG WITH PRINCIPLE CANTILEVER SPAN vSHARP OBLIQUE PERSPECTIVE OF DECK AND APPROACH SPANS ALONG WITH PRINCIPLE CANTILEVER SPAN SHARP OBLIQUE PERSPECTIVE OF DECK AND APPROACH SPANS ALONG WITH PRINCIPLE CANTILEVER SPAN SHARP OBLIQUE PERSPECTIVE OF DECK AND APPROACH SPANS ALONG WITH PRINCIPLE CANTILEVER SPAN - Snake River Bridge at Lyons' Ferry, State Route 261 spanning Snake River, Starbuck, Columbia County, WA

  4. The BridgeDb framework: standardized access to gene, protein and metabolite identifier mapping services

    PubMed Central

    2010-01-01

    Background Many complementary solutions are available for the identifier mapping problem. This creates an opportunity for bioinformatics tool developers. Tools can be made to flexibly support multiple mapping services or mapping services could be combined to get broader coverage. This approach requires an interface layer between tools and mapping services. Results Here we present BridgeDb, a software framework for gene, protein and metabolite identifier mapping. This framework provides a standardized interface layer through which bioinformatics tools can be connected to different identifier mapping services. This approach makes it easier for tool developers to support identifier mapping. Mapping services can be combined or merged to support multi-omics experiments or to integrate custom microarray annotations. BridgeDb provides its own ready-to-go mapping services, both in webservice and local database forms. However, the framework is intended for customization and adaptation to any identifier mapping service. BridgeDb has already been integrated into several bioinformatics applications. Conclusion By uncoupling bioinformatics tools from mapping services, BridgeDb improves capability and flexibility of those tools. All described software is open source and available at http://www.bridgedb.org. PMID:20047655

  5. Visually Storying Living with HIV: Bridging Stressors and Supports in Accessing Care

    ERIC Educational Resources Information Center

    Schrader, S. M.; Deering, E. N.; Zahl, D. A.; Wallace, M.

    2011-01-01

    This paper examines how visual narratives may bridge relational understandings between people living with HIV/AIDS (PLWH/A) and future oral health care providers. Borrowing from literature in participatory visual methods such as photo elicitation and photovoice, we explored how PLWH/A visually choose to represent their daily lives. This study uses…

  6. Showing partial side view of swing span in closed position. ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    Showing partial side view of swing span in closed position. The two (2) arms act as simple spans, a small amount of negative bending is accommodated by the continous top and bottom truss chords due to a continuous condition. Note the inclined end post of each of the simple spans, the operator's house, center/pivot pier and the pivotal pole-line pole placed atop of bridge. - Bridgeport Swing Span Bridge, Spanning Tennessee River, Bridgeport, Jackson County, AL

  7. Safer Bridges

    NASA Technical Reports Server (NTRS)

    1977-01-01

    Safer bridges are among a number of spinoff benefits from NASA procedures for testing 'cfracture toughness" of a structural part, meaning its ability to -siscracktsh at might cause failure. The New River Bridge in West Virginia, shown under construction, is the world's largest single span bridge. U.S. Steel fracture toughness requirements for such bridges include NASA-developed test procedures. Bridge materials and other metal structures may develop flaws during their service lifetimes. Such flaws can affect the structural integrity of the part. Thus, it is important to know the "fracture toughness" of a structural part, or its ability to resist cracks. NASA has long experience in developing fracture toughness tests for aerospace hardware. Since 1960, NASA-Lewis has worked closely with the American Society for Testing & Materials. Lewis and NASA-funded industrial contractors have made many important contributions to test procedures, now recommended by ASTM, for measuring fracture toughness.

  8. 10. DETAIL NEAR CENTER OF SPAN, LOOKING NORTH FROM THE ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    10. DETAIL NEAR CENTER OF SPAN, LOOKING NORTH FROM THE ARROYO SECO. THIS VIEW IS EAST OF THE PARKER-MAYBERRY BRIDGE, WITH THE PIONEER BRIDGE IN THE BACKGROUND. - Colorado Street Bridge, Spanning Arroyo Seco at Colorado Boulevard, Pasadena, Los Angeles County, CA

  9. 11. DETAIL NEAR CENTER OF SPAN, LOOKING SOUTH FROM THE ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    11. DETAIL NEAR CENTER OF SPAN, LOOKING SOUTH FROM THE ARROYO SECO. DETAIL VIEW OF THE PARKER-MAYBERRY BRIDGE, THE ARROYO CHANNEL, AND THE LOWER PORTION OF THE COLORADO STREET BRIDGE. - Colorado Street Bridge, Spanning Arroyo Seco at Colorado Boulevard, Pasadena, Los Angeles County, CA

  10. 16. DETAIL OF END OF SWING SPAN (LEFT) AND SOUTH ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    16. DETAIL OF END OF SWING SPAN (LEFT) AND SOUTH END OF NORTH STATIONARY SPAN REVEALING IRON SKID AND SWING BALANCE SUPPORT WHEEL. NOTE CHAIN USED TO HOLD BRIDGE IN PLACE - Maurice River Pratt Through-Truss Swing Bridge, Spanning Maurice River, Mauricetown, Cumberland County, NJ

  11. Set statistics in conductive bridge random access memory device with Cu/HfO{sub 2}/Pt structure

    SciTech Connect

    Zhang, Meiyun; Long, Shibing Wang, Guoming; Xu, Xiaoxin; Li, Yang; Liu, Qi; Lv, Hangbing; Liu, Ming; Lian, Xiaojuan; Miranda, Enrique; Suñé, Jordi

    2014-11-10

    The switching parameter variation of resistive switching memory is one of the most important challenges in its application. In this letter, we have studied the set statistics of conductive bridge random access memory with a Cu/HfO{sub 2}/Pt structure. The experimental distributions of the set parameters in several off resistance ranges are shown to nicely fit a Weibull model. The Weibull slopes of the set voltage and current increase and decrease logarithmically with off resistance, respectively. This experimental behavior is perfectly captured by a Monte Carlo simulator based on the cell-based set voltage statistics model and the Quantum Point Contact electron transport model. Our work provides indications for the improvement of the switching uniformity.

  12. 2. VIEW EAST, GENERAL VIEW OF BRIDGE WITHIN SETTING, APPROACH ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    2. VIEW EAST, GENERAL VIEW OF BRIDGE WITHIN SETTING, APPROACH SPANS ON RIGHT, PEDESTRIAN BRIDGE FOR HIKING TRAIL ON LEFT - Bridge No. 1132, Route 80, spanning Hammonasset River, Madison, New Haven County, CT

  13. 1. View of Clark Fork Vehicle Bridge facing west. Panorama ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    1. View of Clark Fork Vehicle Bridge facing west. Panorama showing the entire span of bridge from north shore of the Clark Fork River. - Clark Fork Vehicle Bridge, Spanning Clark Fork River, serves Highway 200, Clark Fork, Bonner County, ID

  14. 4. VIEW TAKEN IN THE MIDDLE OF THE BRIDGE, SHOWING ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    4. VIEW TAKEN IN THE MIDDLE OF THE BRIDGE, SHOWING UNDERSIDE OF PORTAL OF ONE SPAN AND LOOKING AT OTHER SPAN - "Forder" Pratt Through Truss Bridge, Spanning Maumee River at County Route 73, Antwerp, Paulding County, OH

  15. Transforming Barriers into Bridges: The Benefits of a Student-Driven Accessibility Planning Committee. Practice Brief

    ERIC Educational Resources Information Center

    Cragg, Stephanie J.; Carter, Irene; Nikolova, Kristina

    2013-01-01

    The School of Social Work and Disability Studies Accessibility Planning Committee (APC) is a student-driven initiative that has been in existence for over 10 years. This practice brief looked at the committee through interviews with faculty and student members. The investigation aimed to determine whether the benefits of having a student-driven…

  16. Bridging Curriculum Access through Differentiation, Part 1: Historical and Background Perspectives

    ERIC Educational Resources Information Center

    Shaw, Angela

    2010-01-01

    Prior to the dawn of the nineteenth century, common schools, social and political practice have driven the direction of the nation's schools and the manner in which children access the promise of an education. The multi-age one-room schoolhouses that dotted America's prairie landscape embarked upon the quest toward education of the masses and…

  17. View of movable span and point truss (to right), from ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    View of movable span and point truss (to right), from navy land, looking west, showing bridge in context of navigational channel. - Naval Supply Annex Stockton, Daggett Road Bridge, Daggett Road traversing Burns Cut Off, Stockton, San Joaquin County, CA

  18. Axionometric Cutaway of Bridge Structure Shoreham Railroad Bridge, Former ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    Axionometric Cutaway of Bridge Structure - Shoreham Railroad Bridge, Former Addison County Railroad (later, Rutland Railroad, Addison Branch), spanning Lemon Fair River above Richville Pond, west of East Shoreham Road, Shoreham, Addison County, VT

  19. 7. Underside of span, details of deck, stringers, floor beams, ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    7. Underside of span, details of deck, stringers, floor beams, bottom-lateral bracing, and north abutment; looking north - Bridge No. 92101, Spanning Pike River at County Highway 373, Embarrass, St. Louis County, MN

  20. General perspective view of the main steel plate girder spans, ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    General perspective view of the main steel plate girder spans, view looking southwest - Whiteson Bridge, Spanning South Yamhill River at Milepoint 42 on Pacific Highway West (Oregon Route 99W), Whiteson, Yamhill County, OR

  1. Detail of expansion bearing shoe of Span No. 1 on ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    Detail of expansion bearing shoe of Span No. 1 on Abutment No. 1, view to south - Gillespie Dam Bridge, Spanning Gila River on Old US 80 Highway, south of Gillespie Dam, Arlington, Maricopa County, AZ

  2. 20. Third approach span, comparing pier types and showing guardrail ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    20. Third approach span, comparing pier types and showing guardrail and connection to arch spring point, looking east - U.S. Route 1 Nottoway River Bridge, U.S. Route 1 spanning Nottoway River, McKenney, Dinwiddie County, VA

  3. INTERIOR OF WEST SPAN LOOKING WEST (SHADOW OF VERTICAL LAPS ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    INTERIOR OF WEST SPAN LOOKING WEST (SHADOW OF VERTICAL LAPS PLACED ON ZONE III; ASPHALT ZONE IX) - Honey Run Bridge, Spanning Butte Creek, bypassed section of Honey Run Road (originally Carr Hill Road), Paradise, Butte County, CA

  4. ELEVATION NORTHEAST BY 30 DEGREES, WEST SECTIONS OF SPAN COVERED ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    ELEVATION NORTHEAST BY 30 DEGREES, WEST SECTIONS OF SPAN COVERED BY OVERGROWTH - Honey Run Bridge, Spanning Butte Creek, bypassed section of Honey Run Road (originally Carr Hill Road), Paradise, Butte County, CA

  5. 33. View of swing span floor framing, looking east from ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    33. View of swing span floor framing, looking east from pivot pier - Macombs Dam Bridge, Spanning Harlem River Between 155th Street Viaduct, Jerome Avenue, & East 162nd Street, Bronx, Bronx County, NY

  6. 7. View of first panel point, bottom chord. Span 1 ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    7. View of first panel point, bottom chord. Span 1 is showing pin connection and eye bar construction around pin. - Bridge No. 33.3, Spanning Elk River at Milepost JC-33.3, Fayetteville, Lincoln County, TN

  7. 56. View below deck of Manhattan side span showing ramps ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    56. View below deck of Manhattan side span showing ramps to East Side Expressway. Jet Lowe, photographer, 1982. - Brooklyn Bridge, Spanning East River between Park Row, Manhattan and Sands Street, Brooklyn, New York County, NY

  8. 51. View below deck superstructure of Manhattan side span showing ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    51. View below deck superstructure of Manhattan side span showing connection between main center cable and deck superstructure. Jet Lowe, photographer, 1982. - Brooklyn Bridge, Spanning East River between Park Row, Manhattan and Sands Street, Brooklyn, New York County, NY

  9. 26. Southern approach span showing detail plan, elevation, and existing ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    26. Southern approach span showing detail plan, elevation, and existing views for pier and abutment structural changes required after flood of December 1955. - Moody Bridge, Spanning South Fork Eel River, Garberville, Humboldt County, CA

  10. 5. EAST SPAN, FROM SOUTH, SHOWING STRUCTURAL CONFIGURATION, INCLUDING POLYGONAL ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    5. EAST SPAN, FROM SOUTH, SHOWING STRUCTURAL CONFIGURATION, INCLUDING POLYGONAL TOP CHORD, TRUSS PANELS, EAST ABUTMENT, AND CENTRAL PIER - Glendale Road Bridge, Spanning Deep Creek Lake on Glendale Road, McHenry, Garrett County, MD

  11. 39. DETAIL AERIAL VIEW LOOKING AT 210' 9' LIFT SPAN ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    39. DETAIL AERIAL VIEW LOOKING AT 210' 9' LIFT SPAN TOWER SHEAVES SHOWING 1 SET WITH AND 1 SET WITHOUT SHEAVE HOODS - Central Railroad of New Jersey, Newark Bay Lift Bridge, Spanning Newark Bay, Newark, Essex County, NJ

  12. 98. George Newman Photographer. VIEW OF THE NEBRASKA SWING SPAN ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    98. George Newman Photographer. VIEW OF THE NEBRASKA SWING SPAN OPEN FOR RIVER PASSAGE. APRIL 13, 1945. - Pacific Shortline Bridge, U.S. Route 20,spanning Missouri River, Sioux City, Woodbury County, IA

  13. 9. Detail of truss work on southwesternmost span, looking northnortheast ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    9. Detail of truss work on southwesternmost span, looking north-northeast - Bridge No. 4800, Spanning Minnesota River on Trunk Highway 4 between Brown & Nicollet Counties, Sleepy Eye, Brown County, MN

  14. 18. WEST DECK TRUSS APPROACH SPAN AND PIERS NO. 1 ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    18. WEST DECK TRUSS APPROACH SPAN AND PIERS NO. 1 AND 2, FROM WEST RIVERBANK. VIEW TO NORTHEAST. - MacArthur Bridge, Spanning Mississippi River on Highway 34 between IA & IL, Burlington, Des Moines County, IA

  15. 19. WEST ANCHOR SPAN OF THROUGH TRUSS AND PIERS NO. ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    19. WEST ANCHOR SPAN OF THROUGH TRUSS AND PIERS NO. 2 AND 3, FROM WEST RIVERBANK. VIEW TO NORTH. - MacArthur Bridge, Spanning Mississippi River on Highway 34 between IA & IL, Burlington, Des Moines County, IA

  16. 15. DETAIL OF EAST DECK GIRDER APPROACH SPANS AND STEEL ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    15. DETAIL OF EAST DECK GIRDER APPROACH SPANS AND STEEL CYLINDER PIERS, FROM EAST RIVERBANK. VIEW TO NORTHWEST. - MacArthur Bridge, Spanning Mississippi River on Highway 34 between IA & IL, Burlington, Des Moines County, IA

  17. 12. DETAIL OF THROUGH TRUSS SPANS AND PIERS NO. 3, ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    12. DETAIL OF THROUGH TRUSS SPANS AND PIERS NO. 3, 4 AND 5, FROM WEST RIVERBANK. VIEW TO NORTHEAST. - MacArthur Bridge, Spanning Mississippi River on Highway 34 between IA & IL, Burlington, Des Moines County, IA

  18. 16. DETAIL OF EAST DECK GIRDER APPROACH SPANS AND STEEL ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    16. DETAIL OF EAST DECK GIRDER APPROACH SPANS AND STEEL CYLINDER PIERS, FROM EAST RIVERBANK. VIEW TO WEST. - MacArthur Bridge, Spanning Mississippi River on Highway 34 between IA & IL, Burlington, Des Moines County, IA

  19. 10. VIEW OF NORTH END SPAN, SHOWING FLOOR BEAM AND ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    10. VIEW OF NORTH END SPAN, SHOWING FLOOR BEAM AND STRINGERS AT PANEL POINT L1 - East Bloomsburg Bridge, Spanning Susquehanna River at Pennsylvania Route 487 (Legislative Route 283), Bloomsburg, Columbia County, PA

  20. 11. VIEW, LOOKING NORTHEAST, SHOWING SOUTH END SPAN, WEST SIDE, ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    11. VIEW, LOOKING NORTHEAST, SHOWING SOUTH END SPAN, WEST SIDE, AT FLOOR LEVEL - East Bloomsburg Bridge, Spanning Susquehanna River at Pennsylvania Route 487 (Legislative Route 283), Bloomsburg, Columbia County, PA

  1. 15. VIEW OF SOUTH END SPAN, SHOWING SWAY BRACING FRAME ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    15. VIEW OF SOUTH END SPAN, SHOWING SWAY BRACING FRAME AT PANEL POINTS 2 AND 4, TOP LATERAL BRACING - East Bloomsburg Bridge, Spanning Susquehanna River at Pennsylvania Route 487 (Legislative Route 283), Bloomsburg, Columbia County, PA

  2. 8. VIEW, LOOKING SOUTHWEST, SHOWING NORTH END SPAN, SIDE AND ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    8. VIEW, LOOKING SOUTHWEST, SHOWING NORTH END SPAN, SIDE AND FLOOR SYSTEM - East Bloomsburg Bridge, Spanning Susquehanna River at Pennsylvania Route 487 (Legislative Route 283), Bloomsburg, Columbia County, PA

  3. 16. Span 1, view across at traffic level, showing all ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    16. Span 1, view across at traffic level, showing all three upper lateral struts; view to east. - Fifth Street Bridge, Spanning MBTA Fitchburg Commuter Rail Line tracks, Conrail Fitchburg Secondary Line & North Nashua River, Fitchburg, Worcester County, MA

  4. 15. Span 1, view across at traffic level; view to ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    15. Span 1, view across at traffic level; view to west. - Fifth Street Bridge, Spanning MBTA Fitchburg Commuter Rail Line tracks, Conrail Fitchburg Secondary Line & North Nashua River, Fitchburg, Worcester County, MA

  5. 52. Fixed Span, Top Chord at Panel Point 6; diagonal ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    52. Fixed Span, Top Chord at Panel Point 6; diagonal member goes to intermediate connection 7 & then to bottom chord at 8; looking ESE. - Pacific Shortline Bridge, U.S. Route 20,spanning Missouri River, Sioux City, Woodbury County, IA

  6. 48. Fixed Span, Detail of Pinned Connection between End Post ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    48. Fixed Span, Detail of Pinned Connection between End Post & First Segment of Top Chord (Vertical Tension Member goes to 2L); looking E. - Pacific Shortline Bridge, U.S. Route 20,spanning Missouri River, Sioux City, Woodbury County, IA

  7. Detail view of fixed end of northernmost truss span. ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    Detail view of fixed end of northernmost truss span. - Pittsburgh, Fort Wayne & Chicago Railway, Beaver River Bridge, Spanning Beaver River along line of Second Avenue, New Brighton, Beaver County, PA

  8. Interior view of fixed end of northernmost truss span, looking ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    Interior view of fixed end of northernmost truss span, looking due south. - Pittsburgh, Fort Wayne & Chicago Railway, Beaver River Bridge, Spanning Beaver River along line of Second Avenue, New Brighton, Beaver County, PA

  9. 6. DETAIL VIEW OF INTERIOR OF NORTH SPAN, SHOWING LOWER ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    6. DETAIL VIEW OF INTERIOR OF NORTH SPAN, SHOWING LOWER BRACING, LOOKING FROM NORTHEAST TO SOUTHWEST - Marathon City Bridge, Spanning Big Rib River, on state Trunk Highway 107, Marathon, Marathon County, WI

  10. 2. VIEW OF NORTH SPAN TRUSS, SHOWING CAUSEWAY BETWEEN NORTH ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    2. VIEW OF NORTH SPAN TRUSS, SHOWING CAUSEWAY BETWEEN NORTH AND SOUTH TRUSS, LOOKING FROM SOUTHWEST TO NORTHEAST - Marathon City Bridge, Spanning Big Rib River, on state Trunk Highway 107, Marathon, Marathon County, WI

  11. 20. DETAIL VIEW OF MOVABLE SPAN MACHINERY UNDER GRID DECK ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    20. DETAIL VIEW OF MOVABLE SPAN MACHINERY UNDER GRID DECK AT CENTRAL CONCRETE SUPPORT PEDESTAL, SHOWING DRIVE GEARS, ELECTRIC MOTOR AND STEEL BEAMS (taken in January 1984) - Sharptown Bridge, Spanning Nanticoke River, State Route 313, Sharptown, Wicomico County, MD

  12. Detail of moveable span over navigation channel of Fort Point ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    Detail of moveable span over navigation channel of Fort Point Channel showing fender remanent. View west - New York, New Haven & Hartford Railroad, Fort Point Channel Rolling Lift Bridge, Spanning Fort Point Channel, Boston, Suffolk County, MA

  13. 32. DETAIL VIEW OF PIVOT SPAN TURNTABLE, SHOWING MORTISE GEAR, ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    32. DETAIL VIEW OF PIVOT SPAN TURNTABLE, SHOWING MORTISE GEAR, GEAR SHAFT, DRIVE GEAR AND BULL GEAR, LOOKING SOUTHEAST - Alton Bridge, Spanning Mississippi River between IL & MO, Alton, Madison County, IL

  14. 33. DETAIL VIEW OF PIVOT SPAN TURNTABLE, SHOWING BEVEL AND ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    33. DETAIL VIEW OF PIVOT SPAN TURNTABLE, SHOWING BEVEL AND MORTISE GEARS, GEAR SHAFT, DRIVE GEAR AND BULL GEAR, LOOKING NORTHEAST - Alton Bridge, Spanning Mississippi River between IL & MO, Alton, Madison County, IL

  15. 15. View north. Detail of west end of link span, ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    15. View north. Detail of west end of link span, north chord, showing expansion joint and typical scupper inside of plate, girder web. - Walpole-Westminster Bridge, Spanning Connecticut River between Walpole, NH & Westminster, VT, Walpole, Cheshire County, NH

  16. 9. View southwest. Typical bearing detail (northwest corner. Walpole span) ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    9. View southwest. Typical bearing detail (northwest corner. Walpole span) showing slip plate and bolted anchorage. - Walpole-Westminster Bridge, Spanning Connecticut River between Walpole, NH & Westminster, VT, Walpole, Cheshire County, NH

  17. 78. VIEW SHOWING PLACEMENT OF LIFE SPAN SHOE ON PIER ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    78. VIEW SHOWING PLACEMENT OF LIFE SPAN SHOE ON PIER 6, LOOKING NORTH, March 5, 1935 - Sacramento River Bridge, Spanning Sacramento River at California State Highway 275, Sacramento, Sacramento County, CA

  18. 15. Perspective view of bascule and vertical lift spans, each ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    15. Perspective view of bascule and vertical lift spans, each in open position, facing east - Sault Ste. Marie International Railroad Bridge, Spanning Soo Locks at St. Marys Falls Canal, Sault Ste. Marie, Chippewa County, MI

  19. 1. GENERAL VIEW LOOKING NORTH SHOWING 130FOOT SPAN OF ECHO ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    1. GENERAL VIEW LOOKING NORTH SHOWING 130-FOOT SPAN OF ECHO BRIDGE OVER THE CHARLES RIVER. - Sudbury River Aqueduct, Echo Bridge, Spanning Charles River at Upper Newton Falls, Newton, Middlesex County, MA

  20. 9. VIEW SHOWING JUNCTION OF CONCRETE EAST APPROACH SPAN WITH ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    9. VIEW SHOWING JUNCTION OF CONCRETE EAST APPROACH SPAN WITH STEEL SPAN, LOOKING NORTH. NOTE ROCKING CAST STEEL SHOE ATTACHED TO PIER TO ALLOW FOR EXPANSION OF STEEL SPAN - Jensen Bridge, Spanning Green River at Town of Jensen, Jensen, Uintah County, UT

  1. 28. Under ninth bridge, view to concrete dam and eighth ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    28. Under ninth bridge, view to concrete dam and eighth bridge in background during heavy rain, view to the SW. - Vicksburg National Military Park Roads & Bridges, Melan Arch Bridges, Spanning various tributaries at Confederate Avenue, Vicksburg, Warren County, MS

  2. What is SPAN?

    NASA Astrophysics Data System (ADS)

    SPAN is the Space Physics Analysis Network. This important research tool of the NASA scientific community links space researchers from over 50 institutions throughout the United States. The SPAN system is growing within the United States, and it also is expanding to connect NASA scientists with European and Japanese space research institutions.The SPAN system serves many functions. Its paramount purpose is to provide scientists with a tool that improves their productivity. SPAN has traditionally been used to exchange mail messages, to send data back and forth for scientific papers and analysis workshops, and to share scientific software. SPAN has played a crucial role by disseminating spacecraft data in near-real time during several recent NASA and ESA program successes, such as the International Cometary Explorer (ICE) spacecraft encounter with Comet Giacobini-Zinner (see “Behind the Scenes During a Comet Encounter” by J.L. Green and J.H. King, Eos, March 4, 1986, p. 105), the Voyager 2 encounter with Uranus, and the Giotto spacecraft encounter with Comet Halley (see “Networking Ground-Based Images of Comet Halley during the Giotto Encounter” by D. Rees et al., Eos, December 16, 1986, p. 1385). Of course, SPAN has served a variety of broader purposes. It has provided (and will continue to provide) an excellent testing ground for trying new technologies and for evaluating ideas about processing, storing, and transferring various kinds of information. Until the recent availability of computers sponsored by the National Science Foundation, the SPAN network provided one of the few opportunities for NASA researchers to have ready access to the supercomputers needed for large-scale numerical simulation of magnetospheric and ionospheric plasma systems. SPAN has also increased its usefulness substantially by the addition of the National Space Science Data Center (NSSDC) as a data node on the system. The network, which was originally based on a starshaped

  3. The role of the local chemical environment of Ag on the resistive switching mechanism of conductive bridging random access memories.

    PubMed

    Souchier, E; D'Acapito, F; Noé, P; Blaise, P; Bernard, M; Jousseaume, V

    2015-10-07

    Conductive bridging random access memories (CBRAMs) are one of the most promising emerging technologies for the next generation of non-volatile memory. However, the lack of understanding of the switching mechanism at the nanoscale level prevents successful transfer to industry. In this paper, Ag/GeSx/W CBRAM devices are analyzed using depth selective X-ray Absorption Spectroscopy before and after switching. The study of the local environment around Ag atoms in such devices reveals that Ag is in two very distinct environments with short Ag-S bonds due to Ag dissolved in the GeSx matrix, and longer Ag-Ag bonds related to an Ag metallic phase. These experiments allow the conclusion that the switching process involves the formation of metallic Ag nano-filaments initiated at the Ag electrode. All these experimental features are well supported by ab initio molecular dynamics simulations showing that Ag favorably bonds to S atoms, and permit the proposal of a model at the microscopic level that can explain the instability of the conductive state in these Ag-GeSx CBRAM devices. Finally, the principle of the nondestructive method described here can be extended to other types of resistive memory concepts.

  4. 33 CFR 118.85 - Lights on vertical lift bridges.

    Code of Federal Regulations, 2013 CFR

    2013-07-01

    ... BRIDGES BRIDGE LIGHTING AND OTHER SIGNALS § 118.85 Lights on vertical lift bridges. (a) Lift span lights. The vertical lift span of every vertical lift bridge shall be lighted so that the center of the navigable channel under the span will be marked by a range of two green lights when the vertical lift...

  5. Procedures for scour assessments at bridges in Pennsylvania

    USGS Publications Warehouse

    Cinotto, Peter J.; White, Kirk E.

    2000-01-01

    Scour is the process and result of flowing water eroding the bed and banks of a stream. Scour at nearly 14,300 bridges(1) spanning water, and the stability of river and stream channels in Pennsylvania, are being assessed by the U.S. Geological Survey (USGS) in cooperation with the Pennsylvania Department of Transportation (PennDOT). Procedures for bridge-scour assessments have been established to address the needs of PennDOT in meeting a 1988 Federal Highway Administration mandate requiring states to establish a program to assess all public bridges over water for their vulnerability to scour. The procedures also have been established to help develop an understanding of the local and regional factors that affect scour and channel stability. This report describes procedures for the assessment of scour at all bridges that are 20 feet or greater in length that span water in Pennsylvania. There are two basic types of assessment: field-viewed bridge site assessments, for which USGS personnel visit the bridge site, and office-reviewed bridge site assessments, for which USGS personnel compile PennDOT data and do not visit the bridge site. Both types of assessments are primarily focused at assisting PennDOT in meeting the requirements of the Federal Highway Administration mandate; however, both assessments include procedures for the collection and processing of ancillary data for subsequent analysis. Date of bridge construction and the accessibility of the bridge substructure units for inspection determine which type of assessment a bridge receives. A Scour-Critical Bridge Indicator Code and a Scour Assessment Rating are computed from selected collected and compiled data. PennDOT personnel assign the final Scour-Critical Bridge Indicator Code and a Scour Assessment Rating on the basis of their review of all data. (1)Words presented in bold type are defined in the Glossary section of this report.

  6. Elkmont Vehicle Bridge, Construction PeelAway Great Smoky Mountains National ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    Elkmont Vehicle Bridge, Construction Peel-Away - Great Smoky Mountains National Park Roads & Bridges, Elkmont Vehicle Bridge, Spanning Little River at Elkmont Campground, Gatlinburg, Sevier County, TN

  7. Assessment of Short Span Bridge Materials.

    DTIC Science & Technology

    1990-01-01

    219 Enterprise, OR 97828 40 Wasco County , OR Daryl Ingebo, Bride County Courthouse, The Dalles, OR 97058 41 Yamhill County , OR Dan Linscheid 2060...literature provided insight into what factors were considered important. A survey of how counties have replaced deficient structures in the past provides...information on materials that will be in demand in the future. This research focused on the criteria that county engineers in Idaho, Oregon, and Washington

  8. 33 CFR 118.85 - Lights on vertical lift bridges.

    Code of Federal Regulations, 2014 CFR

    2014-07-01

    ... 33 Navigation and Navigable Waters 1 2014-07-01 2014-07-01 false Lights on vertical lift bridges... BRIDGES BRIDGE LIGHTING AND OTHER SIGNALS § 118.85 Lights on vertical lift bridges. (a) Lift span lights. The vertical lift span of every vertical lift bridge shall be lighted so that the center of...

  9. 33 CFR 118.85 - Lights on vertical lift bridges.

    Code of Federal Regulations, 2011 CFR

    2011-07-01

    ... below the outermost edge of the bridge span structure so as to be visible from an approaching vessel... 33 Navigation and Navigable Waters 1 2011-07-01 2011-07-01 false Lights on vertical lift bridges... BRIDGES BRIDGE LIGHTING AND OTHER SIGNALS § 118.85 Lights on vertical lift bridges. (a) Lift span...

  10. 33 CFR 118.85 - Lights on vertical lift bridges.

    Code of Federal Regulations, 2012 CFR

    2012-07-01

    ... below the outermost edge of the bridge span structure so as to be visible from an approaching vessel... 33 Navigation and Navigable Waters 1 2012-07-01 2012-07-01 false Lights on vertical lift bridges... BRIDGES BRIDGE LIGHTING AND OTHER SIGNALS § 118.85 Lights on vertical lift bridges. (a) Lift span...

  11. 33 CFR 118.85 - Lights on vertical lift bridges.

    Code of Federal Regulations, 2010 CFR

    2010-07-01

    ... below the outermost edge of the bridge span structure so as to be visible from an approaching vessel... 33 Navigation and Navigable Waters 1 2010-07-01 2010-07-01 false Lights on vertical lift bridges... BRIDGES BRIDGE LIGHTING AND OTHER SIGNALS § 118.85 Lights on vertical lift bridges. (a) Lift span...

  12. View of plate girder spans at north end, looking west ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    View of plate girder spans at north end, looking west from beneath state route 18 bridge (which lies along previous alignment of Pittsburgh, Fort Wayne & Chicago Railway). - Pittsburgh, Fort Wayne & Chicago Railway, Beaver River Bridge, Spanning Beaver River along line of Second Avenue, New Brighton, Beaver County, PA

  13. 1. DEADWOOD CREEK BRIDGE FACING SOUTHWEST. MOUNT RAINIER AND EMMONS ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    1. DEADWOOD CREEK BRIDGE FACING SOUTHWEST. MOUNT RAINIER AND EMMONS GLACIER VISIBLE IN BACKGROUND. - Deadwood Creek Bridge, Spanning Deadwood Creek on Mather Memorial Parkway, Longmire, Pierce County, WA

  14. 5. DOWNSTREAM ELEVATION OF BRIDGE AND SUBSTRUCTURE (with graduated meter ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    5. DOWNSTREAM ELEVATION OF BRIDGE AND SUBSTRUCTURE (with graduated meter pole); VIEW TO NORTH-NORTHEAST. - Auwaiakeakua Bridge, Spanning Auwaiakekua Gulch at Mamalahoa Highway, Waikoloa, Hawaii County, HI

  15. 16. Historic photograph, photographer unknown, 1943. VIEW OF BRIDGE UNDER ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    16. Historic photograph, photographer unknown, 1943. VIEW OF BRIDGE UNDER CONSTRUCTION, LOOKING WEST. - Verde River Sheep Bridge, Spanning Verde River (Tonto National Forest), Cave Creek, Maricopa County, AZ

  16. 11. VIEW NORTHEAST, DETAIL OF BRIDGE BEARING AT SOUTHEAST CORNER, ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    11. VIEW NORTHEAST, DETAIL OF BRIDGE BEARING AT SOUTHEAST CORNER, SHOWING WELDED REINFORCEMENT - Perkins Corner Bridge, Spanning Willimantic River at Flanders & Cider Mill Roads, Coventry, Tolland County, CT

  17. 3. Claremont Railway Bridge and Clement and Rossiter Store in ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    3. Claremont Railway Bridge and Clement and Rossiter Store in context, looking southeast - Claremont Railway Bridge, Spanning Sugar River at Claremont Railroad Company Line, Claremont, Sullivan County, NH

  18. 5. VIEW, LOOKING NORTHEAST, SHOWING BRIDGE COUNTERWEIGHT New York, ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    5. VIEW, LOOKING NORTHEAST, SHOWING BRIDGE COUNTERWEIGHT - New York, New Haven & Hartford Railroad, Niantic Bridge, Spanning Niantic River between East Lyme & Waterford, Old Lyme, New London County, CT

  19. WILLIAMSBURG BRIDGE FROM WILLIAMSBURG COMMUNITY LOOKING SOUTHWEST TOWARDS MANHATTAN ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    WILLIAMSBURG BRIDGE FROM WILLIAMSBURG COMMUNITY LOOKING SOUTHWEST TOWARDS MANHATTAN - Williamsburg Bridge, Spanning East River at South Sixth Street between New York City & Brooklyn, New York County, NY

  20. Software Bridge

    NASA Technical Reports Server (NTRS)

    1995-01-01

    I-Bridge is a commercial version of software developed by I-Kinetics under a NASA Small Business Innovation Research (SBIR) contract. The software allows users of Windows applications to gain quick, easy access to databases, programs and files on UNIX services. Information goes directly onto spreadsheets and other applications; users need not manually locate, transfer and convert data.

  1. Bridge Crossing Simulator

    DTIC Science & Technology

    2014-10-07

    reaction structure, and a control system, the BCS physically simulates vehicular crossing loads for the expected life span of the bridge undergoing...information provided by the customer. In general, statics will be used to determine equations for moments and deflections based on the specific bridge ...systems. Through the use of hydraulic actuators, a reaction structure, and a control system, the Bridge Crossing Simulator physically simulates vehicular

  2. Detail of lift wire rope attachment to lift span at ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    Detail of lift wire rope attachment to lift span at southeast corner. Note rope-adjustment turnbuckle with strap keepers to prevent its rotation, which could pull the bridge out of alignment. A single rope and light-gauge attachment at each corner were adequate for lifting the span because most of its weight was balanced by the two counterweights. - Potomac Edison Company, Chesapeake & Ohio Canal Bridge, Spanning C & O Canal South of U.S. 11, Williamsport, Washington County, MD

  3. 25. Central tension lock looking straight down, south span is ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    25. Central tension lock looking straight down, south span is to the left, north span to the right. there are three tension locks just below road level. - Henry Ford Bridge, Spanning Cerritos Channel, Los Angeles-Long Beach Harbor, Los Angeles, Los Angeles County, CA

  4. 2. GENERAL VIEW LOOKING EAST SHOWING SOUTH SIDE OF BRIDGE. ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    2. GENERAL VIEW LOOKING EAST SHOWING SOUTH SIDE OF BRIDGE. SHALLOW ARCH ON EXTREME RIGHT SPANS ELLIS ST. - Sudbury River Aqueduct, Echo Bridge, Spanning Charles River at Upper Newton Falls, Newton, Middlesex County, MA

  5. VIEW OF APALACHICOLA RIVER BRIDGE WEST APPROACH (CALHOUN COUNTY SIDE) ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    VIEW OF APALACHICOLA RIVER BRIDGE WEST APPROACH (CALHOUN COUNTY SIDE) SHOWING SPAN (BAY) BETWEEN SOLID CONCRETE BENT AND STEEL COLUMN BENT, SOUTH SIDE, FACING NORTH - Apalachicola River Bridge, State Route 20 spanning the Apalachicola River, Blountstown, Calhoun County, FL

  6. 14. BRIDGE TENDER ALBERT REEVES (RIGHT) AND YOUTHFUL HELPER (WALLY ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    14. BRIDGE TENDER ALBERT REEVES (RIGHT) AND YOUTHFUL HELPER (WALLY HALES), HANDLING HUGE 'KEY' TO WIND OPEN THE CENTER SWING SPAN. - Maurice River Pratt Through-Truss Swing Bridge, Spanning Maurice River, Mauricetown, Cumberland County, NJ

  7. 7. DETAIL OF EAST ABUTMENT, LOOKING SOUTHEAST. The easternmost bridge ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    7. DETAIL OF EAST ABUTMENT, LOOKING SOUTHEAST. The easternmost bridge span to shore was removed in the Spring of 1987. - Annisquam Bridge, Spanning Lobster Cove between Washington & River Streets, Gloucester, Essex County, MA

  8. 43. Photographic copy of original construction plan (Wabasha Str. Bridge, ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    43. Photographic copy of original construction plan (Wabasha Str. Bridge, 65 ft Space, floorbeams, 1888); typical details of floorbeams, first span - Wabasha Street Bridge, Spanning Mississippi River at Wabasha Street, Saint Paul, Ramsey County, MN

  9. 39. Photocopy of bridge drawing, 1923 (original in possession of ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    39. Photocopy of bridge drawing, 1923 (original in possession of Wilkes-Barre City Engineer's Office) STRESS SHEET TRUSS SPANS - South Street Bridge, Spans Pennsylvania Avenue, Wilkes-Barre Boulevard, Pocono Northeast Railroad, Wilkes-Barre, Luzerne County, PA

  10. 13. View west. Bridge manufacturer's plate; at east end of ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    13. View west. Bridge manufacturer's plate; at east end of Walpole span, south chord - 'Walsh's Holyoke Steam Boiler Works Holyoke, Mass. Builders'. - Walpole-Westminster Bridge, Spanning Connecticut River between Walpole, NH & Westminster, VT, Walpole, Cheshire County, NH

  11. 8. View of Clark Fork Vehicle Bridge facing southwest. Looking ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    8. View of Clark Fork Vehicle Bridge facing southwest. Looking at understructure of northernmost span. - Clark Fork Vehicle Bridge, Spanning Clark Fork River, serves Highway 200, Clark Fork, Bonner County, ID

  12. 11. View of Clark Fork Vehicle Bridge facing northwest. Southernmost ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    11. View of Clark Fork Vehicle Bridge facing northwest. Southernmost span. Plaque was originally located where striped traffic sign is posted. - Clark Fork Vehicle Bridge, Spanning Clark Fork River, serves Highway 200, Clark Fork, Bonner County, ID

  13. 20. View of Clark Fork Vehicle Bridge facing up. Looking ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    20. View of Clark Fork Vehicle Bridge facing up. Looking at understructure of northernmost span. - Clark Fork Vehicle Bridge, Spanning Clark Fork River, serves Highway 200, Clark Fork, Bonner County, ID

  14. 19. View of Clark Fork Vehicle Bridge facing north. Looking ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    19. View of Clark Fork Vehicle Bridge facing north. Looking at north abutment and underside of northernmost span. - Clark Fork Vehicle Bridge, Spanning Clark Fork River, serves Highway 200, Clark Fork, Bonner County, ID

  15. 31. Photographic copy of drawing showing profile of bridge after ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    31. Photographic copy of drawing showing profile of bridge after the 1888-1889 and 1899-1900 reconstructions; also shows profile of bridge before 1888 (Martin Sigvart Grytbak, Wabasha St. Bridge, Formerly St. Paul Bridge, 1919); profile of Wabasha street bridge - Wabasha Street Bridge, Spanning Mississippi River at Wabasha Street, Saint Paul, Ramsey County, MN

  16. 25. VIEW EAST IN BRIDGE TENDER'S HOUSE, (left) ORIGINAL LEVERS ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    25. VIEW EAST IN BRIDGE TENDER'S HOUSE, (left) ORIGINAL LEVERS FOR GASOLINE ENGINE OPERATION OF SWING-SPAN, (right) PANEL F ELECTRIC OPERATION OF GATES AND SWING-SPAN; new bridge located in background - Tipers Bridge, Spanning Great Wicomico River at State Route 200, Kilmarnock, Lancaster County, VA

  17. 29. Historic photographer, photographer unknown, c. 1944. VIEW OF BRIDGE, ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    29. Historic photographer, photographer unknown, c. 1944. VIEW OF BRIDGE, LOOKING EAST FROM TOP OF WEST TOWER. SHEEP CROSSING BRIDGE. NOTE SWAY CABLES. - Verde River Sheep Bridge, Spanning Verde River (Tonto National Forest), Cave Creek, Maricopa County, AZ

  18. 1. AERIAL VIEW LOOKING SOUTHWEST (OLD HARVARD STREET BRIDGE AT ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    1. AERIAL VIEW LOOKING SOUTHWEST (OLD HARVARD STREET BRIDGE AT LEFT, NEW BRIDGE AT RIGHT) - Old Harvard Street Bridge, Spanning Rock Creek at National Zoological Park, Washington, District of Columbia, DC

  19. 5. View showing Crooked River High Bridge in background and ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    5. View showing Crooked River High Bridge in background and Ralph Modjeski railroad bridge in foreground - Crooked River High Bridge, Spanning Crooked River Gorge at Dalles-California Highway, Terrebonne, Deschutes County, OR

  20. 1. AERIAL VIEW OF THE PATH TRANSIT SYSTEM BRIDGE, LOOKING ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    1. AERIAL VIEW OF THE PATH TRANSIT SYSTEM BRIDGE, LOOKING NORTHEAST. THE CONRAIL BRIDGE (HAER No. NJ-43) AND THE NEWARK TURNPIKE ARE VISIBLE IN THE BACKGROUND - Path Transit System Bridge, Spanning Hackensack River, Kearny, Hudson County, NJ

  1. 1. OVERALL VIEW OF BRIDGE AND LINCOLN HIGHWAY, SHOWING NORTH ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    1. OVERALL VIEW OF BRIDGE AND LINCOLN HIGHWAY, SHOWING NORTH APPROACH TO BRIDGE. VIEW TO SOUTH. - Rock Valley Bridge, Spanning North Timber Creek at Old U.S. Highway 30, Marshalltown, Marshall County, IA

  2. 19. COPY OF ENGRAVING OF 'WROUGHT IRON ARCH TRUSS BRIDGE,' ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    19. COPY OF ENGRAVING OF 'WROUGHT IRON ARCH TRUSS BRIDGE,' PAT. DEC. 10, 1867 BY OHIO BRIDGE COMPANY, CLEVELAND, OHIO. (COURTESY OF OHIO HISTORICAL SOCIETY ARCHIVES, COLUMBUS, OHIO) - Tioronda Bridge, South Avenue spanning Fishkill Creek, Beacon, Dutchess County, NY

  3. 5. VIEW OF BRIDGE, LOOKING EAST FROM THE ARROYO SECO. ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    5. VIEW OF BRIDGE, LOOKING EAST FROM THE ARROYO SECO. THE PARKER-MAYBERRY BRIDGE IS IN THE RIGHT FOREGROUND. - Colorado Street Bridge, Spanning Arroyo Seco at Colorado Boulevard, Pasadena, Los Angeles County, CA

  4. Elevation, west portal. Sign on portal reads Watson Mill Bridge, ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    Elevation, west portal. Sign on portal reads Watson Mill Bridge, est. 1885. - Watson Mill Bridge, Spanning South Fork Broad River, Watson Mill Road, Watson Mill Bridge State Park, Comer, Madison County, GA

  5. 2. Contextual view of bridge in setting, from northwest end ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    2. Contextual view of bridge in setting, from northwest end of bridge, view to south-southeast with Rawson Road in foreground. - Red Bank Creek Bridge, Spanning Red Bank Creek at Rawson Road, Red Bluff, Tehama County, CA

  6. 1. Elevation view of bridge to Smokemont Campground. Great ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    1. Elevation view of bridge to Smokemont Campground. - Great Smoky Mountains National Park Roads & Bridges, Smokemont Bridge, Spanning Oconaluftee River at entrance to Smokemont Campground, Gatlinburg, Sevier County, TN

  7. 2. Deck view of bridge to Smokemont Campground. Great ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    2. Deck view of bridge to Smokemont Campground. - Great Smoky Mountains National Park Roads & Bridges, Smokemont Bridge, Spanning Oconaluftee River at entrance to Smokemont Campground, Gatlinburg, Sevier County, TN

  8. 12. Interior detail of bridge operator's house showing generator and ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    12. Interior detail of bridge operator's house showing generator and bridge operator, Mr. Gene Amonette, facing west. - Palm Valley Bridge, County Road 210 spanning Intracoastal Waterway, Ponte Vedra Beach, St. Johns County, FL

  9. 65. HAMILTON APPROACH LOOKING TOWARD BRIDGE, SHOWING TRANSFER OF THE ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    65. HAMILTON APPROACH LOOKING TOWARD BRIDGE, SHOWING TRANSFER OF THE HIGHWAY APPROACH TO THE BRIDGE STRUCTURE. PHOTOGRAPHER: ROBERT A. RYAN - Keokuk & Hamilton Bridge, Spanning Mississippi River, Keokuk, Lee County, IA

  10. 12. PLANK BRIDGE ON OLD ROAD NEAR NORTH FORK VIRGIN ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    12. PLANK BRIDGE ON OLD ROAD NEAR NORTH FORK VIRGIN RIVER BRIDGE, FACING EAST - Zion-Mount Carmel Highway, Virgin River Bridge, Spanning North Fork of Virgin River on Zion-Mount Carmel Highway, Springdale, Washington County, UT

  11. 11. Standing on westerly fender at edge of bridge looking ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    11. Standing on westerly fender at edge of bridge looking easterly, showing horizontal beams for deck and cross beams (reflection of steel grating on deck). Also shows bridge guardrail. - Colusa Bridge, Spanning Sacramento River, Colusa, Colusa County, CA

  12. 27. View of underside of ninth bridge, showing concrete mixture, ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    27. View of underside of ninth bridge, showing concrete mixture, view to the NW. - Vicksburg National Military Park Roads & Bridges, Melan Arch Bridges, Spanning various tributaries at Confederate Avenue, Vicksburg, Warren County, MS

  13. 10. Detail of bridge underside showing gears for locking mechanism ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    10. Detail of bridge underside showing gears for locking mechanism at south end of bridge. View to east. - Locke Avenue Bridge, Locke Avenue (County Route 671) Spanning Raccoon Creek, Swedesboro, Gloucester County, NJ

  14. 28. Photocopy of drawing, Draw for L Street Bridge, Sheet ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    28. Photocopy of drawing, Draw for L Street Bridge, Sheet 6: Girder C, July 1892. City of Boston Public Works Department Bridge files. - Summer Street Bridge, Spanning Reserved Channel, Boston, Suffolk County, MA

  15. 26. Photocopy of drawing, Draw for L Street Bridge, Sheet ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    26. Photocopy of drawing, Draw for L Street Bridge, Sheet 4: Girder D, Girder F, July 1892. City of Boston Public Works Department Bridge files. - Summer Street Bridge, Spanning Reserved Channel, Boston, Suffolk County, MA

  16. 29. Photocopy of drawing, Draw for L Street Bridge, Sheet ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    29. Photocopy of drawing, Draw for L Street Bridge, Sheet 7: Girder D, July 1892. City of Boston Public Works Department Bridge files. - Summer Street Bridge, Spanning Reserved Channel, Boston, Suffolk County, MA

  17. 31. Photocopy of drawing, Draws for L Street Bridge, Main ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    31. Photocopy of drawing, Draws for L Street Bridge, Main Trucks, August 1892. City of Boston Public Works Department Bridge files. - Summer Street Bridge, Spanning Reserved Channel, Boston, Suffolk County, MA

  18. 25. Photocopy of drawing, Draw for L Street Bridge, Sheet ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    25. Photocopy of drawing, Draw for L Street Bridge, Sheet 3: Girder A, July 1892. City of Boston Public Works Department Bridge files. - Summer Street Bridge, Spanning Reserved Channel, Boston, Suffolk County, MA

  19. 23. Photocopy of drawing, Draw for L Street Bridge, Sheet ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    23. Photocopy of drawing, Draw for L Street Bridge, Sheet 1: Plan and Elevation, July 1892. City of Boston Public Works Department Bridge files. - Summer Street Bridge, Spanning Reserved Channel, Boston, Suffolk County, MA

  20. 30. Photocopy of drawing, Draw for L Street Bridge, Sheet ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    30. Photocopy of drawing, Draw for L Street Bridge, Sheet 8: Samson Posts, Truck Rockers, Portal Struts, July 1892. City of Boston Public Works Department Bridge files. - Summer Street Bridge, Spanning Reserved Channel, Boston, Suffolk County, MA

  1. 24. Photocopy of drawing, Draw for L Street Bridge, Sheet ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    24. Photocopy of drawing, Draw for L Street Bridge, Sheet 2: Floor Beams, July 1982. City of Boston Public Works Department Bridge files. - Summer Street Bridge, Spanning Reserved Channel, Boston, Suffolk County, MA

  2. 27. Photocopy of drawing, Draw for L Street Bridge, Sheet ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    27. Photocopy of drawing, Draw for L Street Bridge, Sheet 5: Girder E, July 1892. City of Boston Public Works Department Bridge files. - Summer Street Bridge, Spanning Reserved Channel, Boston, Suffolk County, MA

  3. 2. Long view east, with bridge in foreground, showing length ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    2. Long view east, with bridge in foreground, showing length of Carquinez Strait with Benecia Martinez Bridge in background. - Carquinez Bridge, Spanning Carquinez Strait at Interstate 80, Vallejo, Solano County, CA

  4. 6. EARLY MORNING VIEW OF BOTH JOSO HIGH BRIDGE (UNION ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    6. EARLY MORNING VIEW OF BOTH JOSO HIGH BRIDGE (UNION PACIFIC RAILROAD) IN BACKGROUND AND LYONS FERRY BRIDGE IN THE FOREGROUND - Snake River Bridge at Lyons' Ferry, State Route 261 spanning Snake River, Starbuck, Columbia County, WA

  5. 8. OVERALL VIEW OF EAST SIDE OF BRIDGE FROM SOUTHEAST ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    8. OVERALL VIEW OF EAST SIDE OF BRIDGE FROM SOUTHEAST LOOKING NORTHWEST. LOW TIDE REVEALS FOUNDATIONS OF BRIDGE. - Ducktrap Bridge, Spanning Ducktrap River at U.S. Route 1, Lincolnville, Waldo County, ME

  6. 1. Elkmont vehicle bridge at Elkmont Campground, galvanized corrugated arch. ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    1. Elkmont vehicle bridge at Elkmont Campground, galvanized corrugated arch. - Great Smoky Mountains National Park Roads & Bridges, Elkmont Vehicle Bridge, Spanning Little River at Elkmont Campground, Gatlinburg, Sevier County, TN

  7. 8. West side of north end of bridge resting on ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    8. West side of north end of bridge resting on approach abutment. Oblique detail view northeast (from below roadbed level, beside bridge). 150 mm lens. - Gault Bridge, Spanning Deer Creek at South Pine Street, Nevada City, Nevada County, CA

  8. Aerial view of the entire bridge crossing the Tennessee River ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    Aerial view of the entire bridge crossing the Tennessee River looking up river. The swing bridge, when open, permits river navigational traffic to ply the river. Construction of a replacement bridge, to be located 93.27 feet down river, has now started. - Bridgeport Swing Span Bridge, Spanning Tennessee River, Bridgeport, Jackson County, AL

  9. 14. DETAIL VIEW OF BRIDGE, LOOKING NORTH, SHOWING DAMAGE TO ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    14. DETAIL VIEW OF BRIDGE, LOOKING NORTH, SHOWING DAMAGE TO FLOOR BEAMS AND DECK OF WEST APPROACH SPAN, CAUSED WHEN CONTRACTOR'S FORCES, WORKING ON ADJACENT ABUTMENT FOR REPLACEMENT BRIDGE, DYNAMITED GRANITE BOULDERS INTO UPSTREAM SIDE OF HISTORIC BRIDGE - Middle Fork Stanislaus River Bridge, Spans Middle Fork Stanislaus River at State Highway 108, Dardanelle, Tuolumne County, CA

  10. 26. VIEW FROM EAST IN BRIDGE TENDER'S HOUSE, LEVERS FOR ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    26. VIEW FROM EAST IN BRIDGE TENDER'S HOUSE, LEVERS FOR GASOLINE ENGINE OPERATION FOR BRIDGE AND THEIR CONNECTIONS TO CONTROL RODS ON DOWNSTREAM SIDE OF SWING-SPAN; new bridge located in background - Tipers Bridge, Spanning Great Wicomico River at State Route 200, Kilmarnock, Lancaster County, VA

  11. 1. GENERAL VIEW LOOKING NORTHEAST, SHOWING BASCULE BRIDGE WITH STONE ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    1. GENERAL VIEW LOOKING NORTHEAST, SHOWING BASCULE BRIDGE WITH STONE PIERS. DRAW SPAN AT CENTER OF BRIDGE IS VISIBLE ON RIGHT. METAL STRUCTURE ABOVE BRIDGE ON RIGHT CONTAINS COUNTER WEIGHT. - Congress Street Bascule Bridge, Spanning Fort Point Channel at Congress Street, Boston, Suffolk County, MA

  12. 9. DETAIL VIEW OF BRIDGE PLATE ON SOUTHEAST SIDE OF ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    9. DETAIL VIEW OF BRIDGE PLATE ON SOUTHEAST SIDE OF BRIDGE AT CENTER OF SPAN OVER CENTER PIER WHICH READS 'BRIDGE COMMISSION, JOE BEASLEY, COUNTY JUDGE, LON WILLIAMS, J.R. GAMBLE' - Illinois River Bridge, Spanning Illinois River at Benton County Road 3, Siloam Springs, Benton County, AR

  13. 11. View of Tombigbee River Bridge facing northeast along center ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    11. View of Tombigbee River Bridge facing northeast along center of roadway. North pony span is in background center and new bridge is partially shown in background left. Barrels shown are remnants of traffic control devices used for one lane traffic due to reduced weight capacity of bridge before closure. - Tombigbee River Bridge, Spanning Tombigbee River at State Highway 182, Columbus, Lowndes County, MS

  14. Substructure Main Bridge, Piers B & C Huey ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    Substructure - Main Bridge, Piers B & C - Huey P. Long Bridge, Spanning Mississippi River approximately midway between nine & twelve mile points upstream from & west of New Orleans, Jefferson, Jefferson Parish, LA

  15. Detailed view of one (1) arm of the swing bridge ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    Detailed view of one (1) arm of the swing bridge cantilevering out from the center/pivot pier on which the entire span is balanced at its center when in the open position. Both arms of the span have equal length. Note that the members are pin-connected at their connections (joints). - Bridgeport Swing Span Bridge, Spanning Tennessee River, Bridgeport, Jackson County, AL

  16. Accessibility

    EPA Pesticide Factsheets

    Federal laws, including Section 508 of the Rehabilitation Act, mandate that people with disabilities have access to the same information that someone without a disability would have. 508 standards cover electronic and information technology (EIT) products.

  17. Detail, east truss of south span, showing railing, vertical UL, ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    Detail, east truss of south span, showing railing, vertical U-L, diagonal eyebar U-L with turnbuckle - Castle Garden Bridge, Township Route 343 over Bennetts Branch of Sinnemahoning Creek, Driftwood, Cameron County, PA

  18. Detail, starpattern balustrade of north span, from northwest, showing row ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    Detail, star-pattern balustrade of north span, from northwest, showing row of four star-pattern railing slabs bracketed by simple molded concrete balusters - Horner Street Bridge, Horner Street over Stonycreek River, Johnstown, Cambria County, PA

  19. View of movable span and point truss (to right), from ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    View of movable span and point truss (to right), from navy land, looking west, showing bridge in context of navigational channel. - Naval Supply Annex Stockton, Rough & Ready Island, Stockton, San Joaquin County, CA

  20. SPAN: Ocean science

    NASA Technical Reports Server (NTRS)

    Thomas, Valerie L.; Koblinsky, Chester J.; Webster, Ferris; Zlotnicki, Victor; Green, James L.

    1987-01-01

    The Space Physics Analysis Network (SPAN) is a multi-mission, correlative data comparison network which links space and Earth science research and data analysis computers. It provides a common working environment for sharing computer resources, sharing computer peripherals, solving proprietary problems, and providing the potential for significant time and cost savings for correlative data analysis. This is one of a series of discipline-specific SPAN documents which are intended to complement the SPAN primer and SPAN Management documents. Their purpose is to provide the discipline scientists with a comprehensive set of documents to assist in the use of SPAN for discipline specific scientific research.

  1. 12. Underside of Skew SpanHot Metal system on right, toward ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    12. Underside of Skew Span-Hot Metal system on right, toward Rocker Bent. - Monongahela Connecting Railroad Company, Hot Metal Bridge, Spanning Monongahela River at mile post 3.1, Pittsburgh, Allegheny County, PA

  2. HOT METAL BRIDGE (NOTE: BUILDERS: JONES AND LAUGHLIN STEEL CA. ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    HOT METAL BRIDGE (NOTE: BUILDERS: JONES AND LAUGHLIN STEEL CA. 1890), SOUTH PORTAL. THREE PIN CONNECTED CAMELBACK TRUSS SPANS, ONE SKEWED THROUGH TRUSS SPAN ON NORTH SIDE TRUSS BRIDGE, EAST OF HOT METAL BRIDGE BUILT BY AMERICAN BRIDGE COMPANY CA. 1910. (RIVETED MULTI-SPAN TRUSS). - Jones & Laughlin Steel Corporation, Pittsburgh Works, Morgan Billet Mill Engine, 550 feet north of East Carson Street, opposite South Twenty-seventh Street, Pittsburgh, Allegheny County, PA

  3. 28. Details for reinforcing L5 C56 span 6. Photographic ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    28. Details for reinforcing L5 - C5-6 span 6. Photographic copy of drawing no. B-2-645-2, C.P.R. Algoma District-Thessalon Subdivision, Bridge no. 134.06-International Bridge at Sault Ste. Marie Bridge (from Canadian National Railroad, Sault Ste. Marie, Michigan). Delineator unknown, January 9, 1933. - Sault Ste. Marie International Railroad Bridge, Spanning Soo Locks at St. Marys Falls Canal, Sault Ste. Marie, Chippewa County, MI

  4. 3. CONTEXTUAL VIEW OF BRIDGE IN SETTING, LOOKING SOUTHWEST FROM ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    3. CONTEXTUAL VIEW OF BRIDGE IN SETTING, LOOKING SOUTHWEST FROM ELEVATED GRADE OF EUREKA SOUTHERN RAILROAD. EUREKA SOUTHERN TRUSS BRIDGE AT EXTREME LEFT, 1924 HIGHWAY BRIDGE IN CENTER, 1952 HIGHWAY BRIDGE AT RIGHT - Van Duzen River Bridge, Spanning Van Duzen River at CA State Highway 101, Alton, Humboldt County, CA

  5. 33 CFR 118.70 - Lights on swing bridges.

    Code of Federal Regulations, 2011 CFR

    2011-07-01

    ... 33 Navigation and Navigable Waters 1 2011-07-01 2011-07-01 false Lights on swing bridges. 118.70 Section 118.70 Navigation and Navigable Waters COAST GUARD, DEPARTMENT OF HOMELAND SECURITY BRIDGES BRIDGE LIGHTING AND OTHER SIGNALS § 118.70 Lights on swing bridges. (a) Swing span lights on through bridges....

  6. 33 CFR 118.70 - Lights on swing bridges.

    Code of Federal Regulations, 2013 CFR

    2013-07-01

    ... 33 Navigation and Navigable Waters 1 2013-07-01 2013-07-01 false Lights on swing bridges. 118.70 Section 118.70 Navigation and Navigable Waters COAST GUARD, DEPARTMENT OF HOMELAND SECURITY BRIDGES BRIDGE LIGHTING AND OTHER SIGNALS § 118.70 Lights on swing bridges. (a) Swing span lights on through bridges....

  7. 33 CFR 118.70 - Lights on swing bridges.

    Code of Federal Regulations, 2012 CFR

    2012-07-01

    ... 33 Navigation and Navigable Waters 1 2012-07-01 2012-07-01 false Lights on swing bridges. 118.70 Section 118.70 Navigation and Navigable Waters COAST GUARD, DEPARTMENT OF HOMELAND SECURITY BRIDGES BRIDGE LIGHTING AND OTHER SIGNALS § 118.70 Lights on swing bridges. (a) Swing span lights on through bridges....

  8. Bridging the UST/AST gap

    SciTech Connect

    1995-10-01

    Choosing between underground and aboveground storage tank options can be a daunting--and risky--enterprise. Although USTs are conveniently out of sight, they cannot remain out of mind, and must be monitored continuously for possible unseen leaks or structural damage. ASTs provide easy access for monitoring and maintenance, but this benefit makes them open targets for vandalism, accidents and long-term effects of exposure to the elements. CON/SPAN{reg_sign} Bridge Systems, Dayton, Ohio, in association with the Dayton-based engineering firm LJB Inc., developed a unique solution to the AST/UST dilemma by adapting the company`s modular-concrete bridge construction technology to storage tank installation.

  9. 45Degree view of one (1) arm of the swing span ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    45-Degree view of one (1) arm of the swing span bridge in the open position. The view shows the continuous bottom chord of the truss. The vertical post and diagonal web members that frame into this bottom chord are connected with single steel pins at each panel point (or joint). The timber track ties, supporting the track, span from truss to truss bottom chords (16' -0') and are supported thereby. - Bridgeport Swing Span Bridge, Spanning Tennessee River, Bridgeport, Jackson County, AL

  10. Increasing Tumor Accessibility with Conjugatable Disulfide-Bridged Tumor-Penetrating Peptides for Cancer Diagnosis and Treatment

    PubMed Central

    Kotamraju, Venkata Ramana; Sharma, Shweta; Kolhar, Poornima; Agemy, Lilach; Pavlovich, James; Ruoslahti, Erkki

    2015-01-01

    Tumor-homing peptides with tissue-penetrating properties increase the efficacy of targeted cancer therapy by delivering an anticancer agent to the tumor interior. LyP-1 (CGNKRTRGC) and iRGD (CRGDKGPDC) are founding members of this class of peptides. The presence of the cysteines forming the cyclizing disulfide bond complicates conjugation of these peptides with other molecules, such as drugs. Here, we report the synthesis of conjugatable disulfide-bridged peptides and their conjugation to biologically important molecules. We have synthesized the LyP-1, iRGD, and CRGDC (GACRGDCLGA) peptides with a cysteine or maleimidohexanoic acid added externally at N-terminus of the sequences. Subsequent conjugation to payloads yielded stable compounds in which the tumor-homing properties of the peptide and the biological activity of the payload were retained. PMID:27385913

  11. Detail of counterweight wire rope attachment to lift span at ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    Detail of counterweight wire rope attachment to lift span at southwest corner. The plates with three pins serve to equalize the forces on the counterweight ropes. - Potomac Edison Company, Chesapeake & Ohio Canal Bridge, Spanning C & O Canal South of U.S. 11, Williamsport, Washington County, MD

  12. 41. Reconstruction of roadway; view of swing span looking northwest ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    41. Reconstruction of roadway; view of swing span looking northwest from Bronx approach, showing new apron under construction-concrete foundation partly built. Note trolley in background and broken asphalt in roadway bed. December 15, 1925 photograph. - University Heights Bridge, Spanning Harlem River at 207th Street & West Harlem Road, New York County, NY

  13. 16. DETAIL VIEW OF DAMAGED AREA OF WEST APPROACH SPAN, ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    16. DETAIL VIEW OF DAMAGED AREA OF WEST APPROACH SPAN, SHOWING REMAINING GRANITE OUTCROP BEING BROKEN UP BY HYDRAULIC HAMMER MOUNTED ON A BACKHOE, LOOKING EAST-NORTHEAST - Middle Fork Stanislaus River Bridge, Spans Middle Fork Stanislaus River at State Highway 108, Dardanelle, Tuolumne County, CA

  14. 9. OBLIQUE VIEW, PARTIAL WEST SPAN, FROM SOUTHWEST, SHOWING TRUSS ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    9. OBLIQUE VIEW, PARTIAL WEST SPAN, FROM SOUTHWEST, SHOWING TRUSS PANELS AND SOLID CONFIGURATION OF TRUSS MEMBERS, INCLUDING POLYGONAL TOP CHORD, VERTICAL AND DIAGONAL MEMBERS, AND CROSS-STRUTS - Glendale Road Bridge, Spanning Deep Creek Lake on Glendale Road, McHenry, Garrett County, MD

  15. 4. General view, Span 1, from southerly end of Railroad ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    4. General view, Span 1, from southerly end of Railroad Street Lane; view to south. (Note roadway grade rising to east.) - Fifth Street Bridge, Spanning MBTA Fitchburg Commuter Rail Line tracks, Conrail Fitchburg Secondary Line & North Nashua River, Fitchburg, Worcester County, MA

  16. 17. DETAIL VIEW OF MOVABLE SPAN MACHINERY, OUTER FIXED GEAR ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    17. DETAIL VIEW OF MOVABLE SPAN MACHINERY, OUTER FIXED GEAR RING AND ROLLERS ON CENTER CONCRETE PEDESTAL; THE TWO DRIVE GEARS MESH INTO THIS RING TO TURN BASCULE (taken in January 1984) - Sharptown Bridge, Spanning Nanticoke River, State Route 313, Sharptown, Wicomico County, MD

  17. 18. DETAIL VIEW OF MOVABLE SPAN UNDER GRID DECK, ONE ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    18. DETAIL VIEW OF MOVABLE SPAN UNDER GRID DECK, ONE OF TWO DRIVE GEARS ON NORTH SIDE OF PEDESTAL THAT MESHES INTO FIXED GEAR RING, SET INTO TOP OF CENTER CONCRETE PEDESTAL, LOOKING SOUTHEAST (taken in March 1984) - Sharptown Bridge, Spanning Nanticoke River, State Route 313, Sharptown, Wicomico County, MD

  18. Detail of west span showing connection of superstructure to granite ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    Detail of west span showing connection of superstructure to granite pier at low tide. Photograph articulates subdeck support members. View southeast - New York, New Haven & Hartford Railroad, Fort Point Channel Rolling Lift Bridge, Spanning Fort Point Channel, Boston, Suffolk County, MA

  19. 1. Threefourths view showing relation of span to creek with ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    1. Three-fourths view showing relation of span to creek with timber trestle approaches. North approach on timber piling, south approach on concrete bents. Note stone piers - Bridge No. 2.4, Spanning Boiling Fork Creek at Railroad Milepost JC-2.4, Decherd, Franklin County, TN

  20. 7. View west. East pier and underside of Walpole span, ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    7. View west. East pier and underside of Walpole span, showing deck beams, stringers, and wind bracing rods. Structure on pier is a stream level gauge station. - Walpole-Westminster Bridge, Spanning Connecticut River between Walpole, NH & Westminster, VT, Walpole, Cheshire County, NH

  1. View of pony truss approach span, showing metal caissons and ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    View of pony truss approach span, showing metal caissons and deck system, including metal floor beams and timber stringers. The same decking system was used on movable span. Looking north from civilian land. - Naval Supply Annex Stockton, Daggett Road Bridge, Daggett Road traversing Burns Cut Off, Stockton, San Joaquin County, CA

  2. Saving the Kilgore Covered Bridge.

    ERIC Educational Resources Information Center

    Clark, Wilma

    1988-01-01

    Describes an American literature class project to save a covered bridge from collapse. Illustrates how student initiative in contacting government agencies and news media, learning the history of the bridge, and raising public awareness about the project led to a joint county agreement to preserve the historic span. (DHP)

  3. 25. VIEW OF McGREGOR BRIDGE (18811936), CROSSING THE MERRIMACK RIVER ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    25. VIEW OF McGREGOR BRIDGE (1881-1936), CROSSING THE MERRIMACK RIVER AT BRIDGE STREET, LOOKING SOUTHEAST. NORTH ELEVATION OF DOUBLE-DECKED, THREE-SPAN DOUGLAS PATENT PARABOLIC IRON TRUSS ERECTED BY CORRUGATED METAL COMPANY (BERLIN IRON BRIDGE COMPANY, BERLIN, CT) From 'Bridge Street Bridge', photographer and date unknown. - Notre Dame Bridge, Spanning Merrimack River on Bridge Street, Manchester, Hillsborough County, NH

  4. Technical and Operational Analysis of the Fortress Secure Wireless Access Bridge (ES-520) in Support of Tactical Military Coalition Operations

    DTIC Science & Technology

    2008-03-01

    Media Access Control MANET Mobile Ad Hoc Networking Mbps Megabit per second MCA Multi-Channel Architecture MIL-STD Military Standard MIMO ...RESEARCH EFFORTS A. BACKGROUND The world of military communications is on the verge of massive and revolutionary change, from new generations of...and custom radio designs. This radio technology roadmap includes 802.11n Multiple-input multiple-output ( MIMO ), 4.9GHz WI-FI, etc [3]. 2. Mesh

  5. Bridging the Digital Divide between Discrete and Continuous Space-Time Array Data to Enhance Accessibility to and Usability of NASA Earth Sciences Data for the Hydrological Community

    NASA Astrophysics Data System (ADS)

    Teng, W. L.; Maidment, D. R.; Vollmer, B.; Peters-Lidard, C. D.; Rui, H.; Strub, R.; Whiteaker, T.; Mocko, D. M.; Kirschbaum, D. B.

    2012-12-01

    A longstanding and significant "Digital Divide" in data representation exists between hydrology and climatology and meteorology. Typically, in hydrology, earth surface features are expressed as discrete spatial objects such as watersheds, river reaches, and point observation sites; and time varying data are contained in time series associated with these spatial objects. Long time histories of data may be associated with a single point or feature in space. In meteorology and climatology, remotely sensed observations and weather and climate model information are expressed as continuous spatial fields, with data sequenced in time from one data file to the next. Hydrology tends to be narrow in space and deep in time, while meteorology and climatology are broad in space and narrow in time. This Divide has been an obstacle, specifically, between the hydrological community, as represented by the Consortium of Universities for the Advancement of Hydrologic Science, Inc. (CUAHSI) and relevant data sets at the NASA Goddard Earth Sciences Data and Information Services Center (GES DISC). CUAHSI has developed the Hydrologic Information System (HIS), which is built on international geospatial standards, with one of its aims to bridge the Divide. The opportunity costs of the Divide are high. It has largely prevented the routine access and use of NASA Earth sciences data by the hydrological and, more generally, geospatial community. This presentation describes a recently-begun NASA ACCESS project that addresses the Digital Divide problem. Progress to date is summarized; technical details are provided in a related presentation (Rui et al., Data Reorganization for Optimal Time Series Data Access, Analysis, and Visualization, IN016). Building on prior prototype efforts with EPA BASINS (Better Assessment Science Integrating point and Nonpoint Sources) and CUAHSI HIS, this project focuses on the following approaches to the problems of data discovery, access, and use: (1) Link HIS and

  6. Building a Straw Bridge

    ERIC Educational Resources Information Center

    Teaching Science, 2015

    2015-01-01

    This project is for a team of students (groups of two or three are ideal) to design and construct a model of a single-span bridge, using plastic drinking straws as the building material. All steps of the design, construction, testing and critiquing stages should be recorded by students in a journal. Students may like to include labelled diagrams,…

  7. 33 CFR 118.70 - Lights on swing bridges.

    Code of Federal Regulations, 2014 CFR

    2014-07-01

    ... 33 Navigation and Navigable Waters 1 2014-07-01 2014-07-01 false Lights on swing bridges. 118.70... LIGHTING AND OTHER SIGNALS § 118.70 Lights on swing bridges. (a) Swing span lights on through bridges. Each... an approaching vessel the swing span when closed will display three red lights on top of the...

  8. 33 CFR 118.70 - Lights on swing bridges.

    Code of Federal Regulations, 2010 CFR

    2010-07-01

    ... 33 Navigation and Navigable Waters 1 2010-07-01 2010-07-01 false Lights on swing bridges. 118.70... LIGHTING AND OTHER SIGNALS § 118.70 Lights on swing bridges. (a) Swing span lights on through bridges. Each... an approaching vessel the swing span when closed will display three red lights on top of the...

  9. 33 CFR 118.80 - Lights on bascule bridges.

    Code of Federal Regulations, 2014 CFR

    2014-07-01

    ... 33 Navigation and Navigable Waters 1 2014-07-01 2014-07-01 false Lights on bascule bridges. 118.80... LIGHTING AND OTHER SIGNALS § 118.80 Lights on bascule bridges. (a) Lift span lights. Each lift span of... green light which shows only when the span is fully open for the passage of a vessel and by a red...

  10. 33 CFR 118.80 - Lights on bascule bridges.

    Code of Federal Regulations, 2011 CFR

    2011-07-01

    ... 33 Navigation and Navigable Waters 1 2011-07-01 2011-07-01 false Lights on bascule bridges. 118.80... LIGHTING AND OTHER SIGNALS § 118.80 Lights on bascule bridges. (a) Lift span lights. Each lift span of... green light which shows only when the span is fully open for the passage of a vessel and by a red...

  11. 33 CFR 118.80 - Lights on bascule bridges.

    Code of Federal Regulations, 2012 CFR

    2012-07-01

    ... 33 Navigation and Navigable Waters 1 2012-07-01 2012-07-01 false Lights on bascule bridges. 118.80... LIGHTING AND OTHER SIGNALS § 118.80 Lights on bascule bridges. (a) Lift span lights. Each lift span of... green light which shows only when the span is fully open for the passage of a vessel and by a red...

  12. 33 CFR 118.80 - Lights on bascule bridges.

    Code of Federal Regulations, 2013 CFR

    2013-07-01

    ... 33 Navigation and Navigable Waters 1 2013-07-01 2013-07-01 false Lights on bascule bridges. 118.80... LIGHTING AND OTHER SIGNALS § 118.80 Lights on bascule bridges. (a) Lift span lights. Each lift span of... green light which shows only when the span is fully open for the passage of a vessel and by a red...

  13. 15. BRIDGE TENDER ALBERT REEVES OF MAURICETOWN AND HELPER WALLY ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    15. BRIDGE TENDER ALBERT REEVES OF MAURICETOWN AND HELPER WALLY HALES HOLDING HUGE KEY ABOVE HOLE IN DECK OF CENTER SWING SPAN TO REVEAL KEY BASETHE KEY IS SET UPON A MALE FITTING USED TO OPEN THE SPAN - Maurice River Pratt Through-Truss Swing Bridge, Spanning Maurice River, Mauricetown, Cumberland County, NJ

  14. 33 CFR 118.80 - Lights on bascule bridges.

    Code of Federal Regulations, 2010 CFR

    2010-07-01

    ... 33 Navigation and Navigable Waters 1 2010-07-01 2010-07-01 false Lights on bascule bridges. 118.80... LIGHTING AND OTHER SIGNALS § 118.80 Lights on bascule bridges. (a) Lift span lights. Each lift span of... green light which shows only when the span is fully open for the passage of a vessel and by a red...

  15. January | 201span>6 | Space Station - NASA

    NASA Website

    August 201span>6; July 201span>6; June 201span>6; May 201span>6; April 201span>6; March 201span>6; February 201span>6; January 201span>6; December 2015; November 2015; October 2015; ...

  16. Bridge permeameter

    DOEpatents

    Graf, Darin C.; Warpinski, Norman R.

    1996-01-01

    A system for single-phase, steady-state permeability measurements of porous rock utilizes a fluid bridge arrangement analogous to a Wheatstone bridge. The arms of the bridge contain the sample and calibrated flow resistors.

  17. Coop Creek Bridge with Checkerboard Mesa in background, historic photograph, ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    Co-op Creek Bridge with Checkerboard Mesa in background, historic photograph, no date, Zion National Park collection - Zion-Mount Carmel Highway, Co-op Creek Bridge, Spanning Co-op Creek, Springdale, Washington County, UT

  18. 6. DETAIL VIEW OF NORTHEAST END OF BRIDGE, SHOWING ROCKER ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    6. DETAIL VIEW OF NORTHEAST END OF BRIDGE, SHOWING ROCKER ARM PORTION OF BASCULE - Seddon Island Scherzer Rolling Lift Bridge, Spanning Garrison Channel from Tampa to Seddon Island, Tampa, Hillsborough County, FL

  19. General perspective view of the Whiteson Bridge, view looking north ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    General perspective view of the Whiteson Bridge, view looking north - Whiteson Bridge, Spanning South Yamhill River at Milepoint 42 on Pacific Highway West (Oregon Route 99W), Whiteson, Yamhill County, OR

  20. 1. VIEW LOOKING SOUTHEAST TOWARD BRIDGE, FORMER SILVER SPRING BLEACHING ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    1. VIEW LOOKING SOUTHEAST TOWARD BRIDGE, FORMER SILVER SPRING BLEACHING AND DYEING COMPANY MILL IN BACKGROUND. - Charles Street Bridge, Spanning West River on Charles Street, Providence, Providence County, RI

  1. 13. VIEW OF BRIDGE, LOOKING WEST FROM THE WEST TOWER ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    13. VIEW OF BRIDGE, LOOKING WEST FROM THE WEST TOWER TO THE MAIN SUSPENSION CABLE WEST ANCHORAGE. February 1987 - Verde River Sheep Bridge, Spanning Verde River (Tonto National Forest), Cave Creek, Maricopa County, AZ

  2. 28. VIEW OF BRIDGE, LOOKING WEST FROM CREST OF HILL ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    28. VIEW OF BRIDGE, LOOKING WEST FROM CREST OF HILL ABOVE EAST TOWER. NOTE SWAY CABLES ON EACH SIDE OF THE WALKWAY. March 1987 - Verde River Sheep Bridge, Spanning Verde River (Tonto National Forest), Cave Creek, Maricopa County, AZ

  3. 18. Historic photograph, photographer unknown, 1943. VIEW OF BRIDGE, LOOKING ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    18. Historic photograph, photographer unknown, 1943. VIEW OF BRIDGE, LOOKING EAST. EAST TOWER ON SKYLINE HAS NOT BEEN REINFORCED WITH CONCRETE. - Verde River Sheep Bridge, Spanning Verde River (Tonto National Forest), Cave Creek, Maricopa County, AZ

  4. 3. AERIAL VIEW SHOWING THE ENTIRE BRIDGE FROM EAST CABLE ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    3. AERIAL VIEW SHOWING THE ENTIRE BRIDGE FROM EAST CABLE ANCHORAGE (EXTREME LEFT) TO WEST CABLE ANCHORAGE (UPPER RIGHT CORNER). March 1987. - Verde River Sheep Bridge, Spanning Verde River (Tonto National Forest), Cave Creek, Maricopa County, AZ

  5. 2. AERIAL VIEW OF BRIDGE IN CONTEXT FROM SOUTHWEST. LOOKING ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    2. AERIAL VIEW OF BRIDGE IN CONTEXT FROM SOUTHWEST. LOOKING NORTHEAST. - Rue Road Bridge, Rue Road, spanning Matchaponix Brook, .35 mile east of intersection with Route 613, Jamesburg, Middlesex County, NJ

  6. 9. WEST ELEVATION OBLIQUE FROM UNDER DRISCOLL BRIDGE. LOOKING NORTHBYNORTHEAST. ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    9. WEST ELEVATION OBLIQUE FROM UNDER DRISCOLL BRIDGE. LOOKING NORTH-BY-NORTHEAST. - Rue Road Bridge, Rue Road, spanning Matchaponix Brook, .35 mile east of intersection with Route 613, Jamesburg, Middlesex County, NJ

  7. 1. AERIAL VIEW OF BRIDGE IN CONTEXT INCLUDING VICTORY CIRCLE ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    1. AERIAL VIEW OF BRIDGE IN CONTEXT INCLUDING VICTORY CIRCLE FROM SOUTH. LOOKING NORTH. - Rue Road Bridge, Rue Road, spanning Matchaponix Brook, .35 mile east of intersection with Route 613, Jamesburg, Middlesex County, NJ

  8. 3. HISTORIC PHOTOGRAPH, WIRE MILL ROAD BRIDGE UNDER CONSTRUCTION, CA. ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    3. HISTORIC PHOTOGRAPH, WIRE MILL ROAD BRIDGE UNDER CONSTRUCTION, CA. 1935. COLLECTION CONNECTICUT DEPARTMENT OF TRANSPORTATION. - Merritt Parkway, Wire Mill Road Bridge, Spanning Merritt Parkway, Stamford, Fairfield County, CT

  9. 3. Looking West, view of the entire bridge from the ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    3. Looking West, view of the entire bridge from the downstream side of thomes creek. The ends of structure are concealed by natural vegetation on the stream banks. - Weidemeyer Bridge, Spanning Thomes Creek at Rawson Road, Corning, Tehama County, CA

  10. 38. 100 foot through truss bridge original identification plaque ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    38. 100 foot through truss - bridge original identification plaque located on the top of the north portal entrance. - Weidemeyer Bridge, Spanning Thomes Creek at Rawson Road, Corning, Tehama County, CA

  11. 8. DETAIL VIEW OF CONNECTION AT CENTER OF BRIDGE. WELDED ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    8. DETAIL VIEW OF CONNECTION AT CENTER OF BRIDGE. WELDED PLATE AND I-BARS ARE 20TH CENTURY REVISIONS. - Bucks County Bridge No. 313, Spanning Delaware Canal at Letchworth Avenue, Yardley, Bucks County, PA

  12. 4. GENERAL VIEW, LOOKING NORTH, SHOWING BRIDGE PARAPETS AND SETTING ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    4. GENERAL VIEW, LOOKING NORTH, SHOWING BRIDGE PARAPETS AND SETTING (SCALE ROD IS MEASURED IN FEET) - Spring Lake Bridge, Spanning Bob Barnes Branch at County Road No. 36D, Belleville, Yell County, AR

  13. 5. LOOKING EAST ALONG AXIS OF BRIDGE. NOTE LARGE UNDEVELOPED ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    5. LOOKING EAST ALONG AXIS OF BRIDGE. NOTE LARGE UNDEVELOPED AREA IN FORMER CHANNEL OF RIVER (MOVED 1930). - St. Charles Air Line Bridge, Spanning South Branch of Chicago River, north of Sixteenth Street, Chicago, Cook County, IL

  14. 6. VIEW LOOKING WEST FROM BRIDGE DECK, SHOWING TOP LATERAL ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    6. VIEW LOOKING WEST FROM BRIDGE DECK, SHOWING TOP LATERAL BRACING, MAIN TIE AND COUNTERS, SWAY STRUTS AND BRACING, AND INTERMEDIATE POSTS - Hart County Bridge, State Route 181, spanning Savannah River, Hartwell, Hart County, GA

  15. 17. VIEW OF NORTH BRIDGE PORTAL, SHOWING ORNAMENTAL UPPER PORTAL ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    17. VIEW OF NORTH BRIDGE PORTAL, SHOWING ORNAMENTAL UPPER PORTAL STRUT AND GEOMETRIC DECORATED GUSSET. FACING NORTHEAST. - Coverts Crossing Bridge, Spanning Mahoning River along Township Route 372 (Covert Road), New Castle, Lawrence County, PA

  16. 2. FULL VIEW OF BRIDGE, SHOWING INCLINED END POST (HATTER ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    2. FULL VIEW OF BRIDGE, SHOWING INCLINED END POST (HATTER POST), PORTAL BRACING, AND PORTAL STRUT AT EAST PORTAL, LOOKING WEST - Chester Bridge, Spanning Rock River on Old Marsh Road, East Waupun, Dodge County, WI

  17. 15. VIEW OF SOUTH BRIDGE PORTAL, SHOWING ORNAMENTAL UPPER PORTAL ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    15. VIEW OF SOUTH BRIDGE PORTAL, SHOWING ORNAMENTAL UPPER PORTAL STRUT AND GUSSETS (FLORAL MOTIF). FACING SOUTHWEST. - Coverts Crossing Bridge, Spanning Mahoning River along Township Route 372 (Covert Road), New Castle, Lawrence County, PA

  18. 19. View of interior of bridge operator's control cabin, with ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    19. View of interior of bridge operator's control cabin, with manual control levers at left, and electrical equipment cabinet at right; looking west - India Point Railroad Bridge, Spanning Seekonk River between Providence & East Providence, Providence, Providence County, RI

  19. 72. View looking SE down pedestrian walking away from bridge ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    72. View looking SE down pedestrian walking away from bridge towards Brooklyn. Jet Lowe, photographer, 1982. - Brooklyn Bridge, Spanning East River between Park Row, Manhattan and Sands Street, Brooklyn, New York County, NY

  20. 7. SANDY RIVER BRIDGE AT TROUTDALE, PERSPECTIVE LOOKING EAST. ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    7. SANDY RIVER BRIDGE AT TROUTDALE, PERSPECTIVE LOOKING EAST. - Historic Columbia River Highway, Sandy River Bridge at Troutdale, Historic Columbia River Highway spanning Sandy River, Troutdale, Multnomah County, OR

  1. 2. SANDY RIVER BRIDGE AT TROUTDALE, SOUTH END, LOOKING 20 ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    2. SANDY RIVER BRIDGE AT TROUTDALE, SOUTH END, LOOKING 20 DEGREES NORTH. - Historic Columbia River Highway, Sandy River Bridge at Troutdale, Historic Columbia River Highway spanning Sandy River, Troutdale, Multnomah County, OR

  2. 6. SANDY RIVER BRIDGE AT TROUTDALE, EAST ELEVATION, LOOKING 306 ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    6. SANDY RIVER BRIDGE AT TROUTDALE, EAST ELEVATION, LOOKING 306 DEGREES NORTHWEST. - Historic Columbia River Highway, Sandy River Bridge at Troutdale, Historic Columbia River Highway spanning Sandy River, Troutdale, Multnomah County, OR

  3. 1. SANDY RIVER BRIDGE AT TROUTDALE, SOUTH END, LOOKING 18 ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    1. SANDY RIVER BRIDGE AT TROUTDALE, SOUTH END, LOOKING 18 DEGREES NORTH. SAME PHOTO AS OR-36-1. - Historic Columbia River Highway, Sandy River Bridge at Troutdale, Historic Columbia River Highway spanning Sandy River, Troutdale, Multnomah County, OR

  4. 5. SANDY RIVER BRIDGE AT TROUTDALE, EAST ELEVATION DETAIL, LOOKING ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    5. SANDY RIVER BRIDGE AT TROUTDALE, EAST ELEVATION DETAIL, LOOKING 6 DEGREES NORTH. - Historic Columbia River Highway, Sandy River Bridge at Troutdale, Historic Columbia River Highway spanning Sandy River, Troutdale, Multnomah County, OR

  5. 3. SANDY RIVER BRIDGE AT TROUTDALE, NORTH END, LOOKING 184 ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    3. SANDY RIVER BRIDGE AT TROUTDALE, NORTH END, LOOKING 184 DEGREES SOUTH. SAME PHOTO AS OR-36-2. - Historic Columbia River Highway, Sandy River Bridge at Troutdale, Historic Columbia River Highway spanning Sandy River, Troutdale, Multnomah County, OR

  6. 4. SANDY RIVER BRIDGE AT TROUTDALE, NORTH END, LOOKING 224 ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    4. SANDY RIVER BRIDGE AT TROUTDALE, NORTH END, LOOKING 224 DEGREES SOUTHWEST. - Historic Columbia River Highway, Sandy River Bridge at Troutdale, Historic Columbia River Highway spanning Sandy River, Troutdale, Multnomah County, OR

  7. 48. EXCAVATING AND DRIVING PILES FOR SHOOFLY BRIDGE, YOLO COUNTY ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    48. EXCAVATING AND DRIVING PILES FOR SHOOFLY BRIDGE, YOLO COUNTY SIDE OF RIVER, November 7, 1934 - Sacramento River Bridge, Spanning Sacramento River at California State Highway 275, Sacramento, Sacramento County, CA

  8. 13. View looking E from Manhattan shore with Manhattan Bridge ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    13. View looking E from Manhattan shore with Manhattan Bridge in background. Jet Lowe, photographer, 1979. - Brooklyn Bridge, Spanning East River between Park Row, Manhattan and Sands Street, Brooklyn, New York County, NY

  9. 8. View looking SW with Manhattan Bridge in foreground. Jet ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    8. View looking SW with Manhattan Bridge in foreground. Jet Lowe, photographer, 1982. - Brooklyn Bridge, Spanning East River between Park Row, Manhattan and Sands Street, Brooklyn, New York County, NY

  10. 36. View looking E at Manhattan Tower with Manhattan Bridge ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    36. View looking E at Manhattan Tower with Manhattan Bridge in background. Jet Lowe, photographer, 1982. - Brooklyn Bridge, Spanning East River between Park Row, Manhattan and Sands Street, Brooklyn, New York County, NY

  11. 83. VIEW SHOWING DRIFTWOOD LODGED AGAINST SHOOFLY BRIDGE, WITH RIVER ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    83. VIEW SHOWING DRIFTWOOD LODGED AGAINST SHOOFLY BRIDGE, WITH RIVER AT FLOOD STAGE, LOOKING SOUTHWEST, April 8, 1935 - Sacramento River Bridge, Spanning Sacramento River at California State Highway 275, Sacramento, Sacramento County, CA

  12. 8. The entire south face of the Broad Street bridge ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    8. The entire south face of the Broad Street bridge as seen from the flood levy in front of Central High School. - Broad Street Bridge, Spanning Scioto River at U.S. Route 40 (Broad Street), Columbus, Franklin County, OH

  13. 7. DETAIL VIEW SHOWING CONNECTION OF BRIDGE COLUMN, TRUSS, TOP ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    7. DETAIL VIEW SHOWING CONNECTION OF BRIDGE COLUMN, TRUSS, TOP BEAM, AND ARCHED CROSS MEMBER. NOTE KNEE BRACE FOR CROSS MEMBER AND DIAGONAL TENSION BAR - Heber Creeper Railroad Line, Olmstead Bridge, Spanning Provo River, Provo, Utah County, UT

  14. 2. ENVIRONMENT, FROM EAST, SHOWING BOSTON STREET BRIDGE CARRYING BOSTON ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    2. ENVIRONMENT, FROM EAST, SHOWING BOSTON STREET BRIDGE CARRYING BOSTON STREET OVER HARRIS CREEK SEWER - Boston Street Bridge, Spanning Harris Creek Sewer at Boston Street, Baltimore, Independent City, MD

  15. 3. VIEW LOOKING WEST OF APPROACH TO THE BRIDGE AND ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    3. VIEW LOOKING WEST OF APPROACH TO THE BRIDGE AND INCLUDING SCENES OF THE SURROUNDING RURAL ENVIRONMENT. - Madison County Bridge 90, Spanning Killbuck Creek on County Road No. 600, Moonville, Madison County, IN

  16. 1. ENVIRONMENT, FROM SOUTH, SHOWING BOSTON STREET BRIDGE CARRYING BOSTON ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    1. ENVIRONMENT, FROM SOUTH, SHOWING BOSTON STREET BRIDGE CARRYING BOSTON STREET OVER HARRIS CREEK SEWER OUTLET AT NORTHWEST BRANCH OF PATAPSCO RIVER (BALTIMORE HARBOR) - Boston Street Bridge, Spanning Harris Creek Sewer at Boston Street, Baltimore, Independent City, MD

  17. 20. General east to west elevated view of Moody Bridge ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    20. General east to west elevated view of Moody Bridge placing it within and in relation to the surrounding rural environment. - Moody Bridge, Spanning South Fork Eel River, Garberville, Humboldt County, CA

  18. 3. ENVIRONMENT, FROM WEST, SHOWING BOSTON STREET BRIDGE CARRYING BOSTON ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    3. ENVIRONMENT, FROM WEST, SHOWING BOSTON STREET BRIDGE CARRYING BOSTON STREET OVER HARRIS CREEK SEWER, WITH PORTION OF AMERICAN CAN COMPANY COMPLEX - Boston Street Bridge, Spanning Harris Creek Sewer at Boston Street, Baltimore, Independent City, MD

  19. 8. ALABAMA, SUMTER CO., EPES RAILROAD BRIDGE Just N of ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    8. ALABAMA, SUMTER CO., EPES RAILROAD BRIDGE Just N of U.S. 11, N of Epes Southern RR. lift span, from SW. Sarcone Photography, Columbus, Ms. Sep 1978. - Bridges of the Upper Tombigbee River Valley, Cochrane, Pickens County, AL

  20. 50. MISSISSIPPI, LOWNDES CO. COLUMBUS RAILROAD BRIDGE End of St. ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    50. MISSISSIPPI, LOWNDES CO. COLUMBUS RAILROAD BRIDGE End of St. S., Columbus, Ms. Side view of fixed truss span, from S. Sarcone Photography, Columbus, Ms. Sep 1978. - Bridges of the Upper Tombigbee River Valley, Columbus, Lowndes County, MS

  1. 11. ALABAMA, SUMTER CO., EPES RAILROAD BRIDGE Just N of ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    11. ALABAMA, SUMTER CO., EPES RAILROAD BRIDGE Just N of U.S. 11 N of Epes Southern RR. lift span, S tower. Sarcone Photography, Columbus, MS. Sep 1978. - Bridges of the Upper Tombigbee River Valley, Cochrane, Pickens County, AL

  2. PERSPECTIVE NORTHEAST. NOTE TYPICAL NEW HAMPSHIRE COVERED BRIDGE HOUSING, WITH ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    PERSPECTIVE NORTHEAST. NOTE TYPICAL NEW HAMPSHIRE COVERED BRIDGE HOUSING, WITH UPPER PORTION OF TRUSSES LEFT EXPOSED AND VERTICAL PLANK SIDING COVERING THE LOWER PORTION. - Mechanic Street Bridge, Spanning Israel River, Lancaster, Coos County, NH

  3. 4. FACING EAST ACROSS BRIDGE AT HALF DOME WITH BICYCLE ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    4. FACING EAST ACROSS BRIDGE AT HALF DOME WITH BICYCLE PATH MARKERS IN FOREGROUND AND ELECTRICAL TRANSFORMER FOR CAMPGROUND TO RIGHT. - Ahwahnee Bridge, Spanning Merced River on service road, Yosemite Village, Mariposa County, CA

  4. 1. AERIAL VIEW, SHOWING GLENDALE ROAD BRIDGE WITHIN ITS SETTING ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    1. AERIAL VIEW, SHOWING GLENDALE ROAD BRIDGE WITHIN ITS SETTING AT GLENDALE ROAD CROSSING OF DEEP CREEK LAKE (PHOTOGRAPH BY RUTHVAN MORROW) - Glendale Road Bridge, Spanning Deep Creek Lake on Glendale Road, McHenry, Garrett County, MD

  5. 2. AERIAL VIEW, SHOWING GLENDALE ROAD BRIDGE WITHIN ITS SETTING ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    2. AERIAL VIEW, SHOWING GLENDALE ROAD BRIDGE WITHIN ITS SETTING AT GLENDALE ROAD CROSSING OF DEEP CREEK LAKE (PHOTOGRAPH BY RUTHVAN MORROW) - Glendale Road Bridge, Spanning Deep Creek Lake on Glendale Road, McHenry, Garrett County, MD

  6. 10. DETAIL OF BRIDGE SUBSTRUCTURE, SHOWING ORIGINAL CONNECTION WITH IRON ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    10. DETAIL OF BRIDGE SUBSTRUCTURE, SHOWING ORIGINAL CONNECTION WITH IRON PINS. VIEW LOOKING WEST FROM FACE OF EAST ABUTMENT. - Annisquam Bridge, Spanning Lobster Cove between Washington & River Streets, Gloucester, Essex County, MA

  7. 1. VIEW OF WEST HEADWALL AND WING WALL, FROM BRIDGE ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    1. VIEW OF WEST HEADWALL AND WING WALL, FROM BRIDGE TO THE WEST, FACING EAST. - Cut Stone Bridge, Southern Pacific Railroad line spanning runoff channel at South Spruce Avenue, South San Francisco, San Mateo County, CA

  8. View of approach to the bridge, looking east, showing the ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    View of approach to the bridge, looking east, showing the setting - Beartooth Highway, Little Bear Creek Bridge No. 1, Spanning Little Bear Creek on U.S. Highway 212 at Milepost 28.2, Cody, Park County, WY

  9. View of the bridge, from the north side, looking south, ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    View of the bridge, from the north side, looking south, showing the setting - Beartooth Highway, Little Bear Creek Bridge No. 1, Spanning Little Bear Creek on U.S. Highway 212 at Milepost 28.2, Cody, Park County, WY

  10. View of the bridge, from the south side, looking north, ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    View of the bridge, from the south side, looking north, showing construction - Beartooth Highway, Little Bear Creek Bridge No. 2, Spanning Little Bear Creek on U.S. Highway 212 at Milepost 29.0, Cody, Park County, WY

  11. View of the bridge, from the north side, looking south, ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    View of the bridge, from the north side, looking south, showing construction - Beartooth Highway, Little Bear Creek Bridge No. 2, Spanning Little Bear Creek on U.S. Highway 212 at Milepost 29.0, Cody, Park County, WY

  12. View of the bridge, from the north side, looking southwest, ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    View of the bridge, from the north side, looking southwest, showing the setting - Beartooth Highway, Little Bear Creek Bridge No. 2, Spanning Little Bear Creek on U.S. Highway 212 at Milepost 29.0, Cody, Park County, WY

  13. View of approach to the bridge, looking west, showing the ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    View of approach to the bridge, looking west, showing the setting - Beartooth Highway, Little Bear Creek Bridge No. 1, Spanning Little Bear Creek on U.S. Highway 212 at Milepost 28.2, Cody, Park County, WY

  14. 6. BRIDGE LOOKING SOUTH FROM CROWN POINT STATE PARK SHOWING ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    6. BRIDGE LOOKING SOUTH FROM CROWN POINT STATE PARK SHOWING SURROUNDING DEVELOPMENT FROM CONSTRUCTION OF DAM - Columbia River Bridge at Grand Coulee Dam, Spanning Columbia River at State Route 155, Coulee Dam, Okanogan County, WA

  15. 10. BRIDGE IN CONTEXT OF DAM, THIRD POWER HOUSE IN ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    10. BRIDGE IN CONTEXT OF DAM, THIRD POWER HOUSE IN FOREGROUND, LOOKING NORTH BY 360 DEGREES - Columbia River Bridge at Grand Coulee Dam, Spanning Columbia River at State Route 155, Coulee Dam, Okanogan County, WA

  16. 6. Photocopy of photograph, 1972. GRAFTON BRIDGE COLLAPSE IN AUGUST ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    6. Photocopy of photograph, 1972. GRAFTON BRIDGE COLLAPSE IN AUGUST OF 1890 (From the original collection of Miss Lois Heflin, Grafton, WV) - Northwestern Virginia Railroad, Grafton Bridge, Spanning Tygart Valley River, Grafton, Taylor County, WV

  17. 4. CONSTRUCTION DETAIL, SW CORNER, SHOWING RETAINING WALL, BRIDGE WALL ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    4. CONSTRUCTION DETAIL, SW CORNER, SHOWING RETAINING WALL, BRIDGE WALL AND EROSION ON ROAD SURFACE. - Bridalveil Fall Bridge No. 3, Spanning Bridalveil Creek on carriage road, Yosemite Village, Mariposa County, CA

  18. 2. VIEW, LOOKING SOUTHEAST, SHOWING PIER OF EARLIER SWING BRIDGE ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    2. VIEW, LOOKING SOUTHEAST, SHOWING PIER OF EARLIER SWING BRIDGE - New York, New Haven & Hartford Railroad, Niantic Bridge, Spanning Niantic River between East Lyme & Waterford, Old Lyme, New London County, CT

  19. 16. INTERIOR, BRIDGE OPERATING CONTROLS IN OPERATOR'S HOUSE New ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    16. INTERIOR, BRIDGE OPERATING CONTROLS IN OPERATOR'S HOUSE - New York, New Haven & Hartford Railroad, Niantic Bridge, Spanning Niantic River between East Lyme & Waterford, Old Lyme, New London County, CT

  20. 19. VIEW, LOOKING SOUTHWEST, SHOWING BRIDGE IN CLOSED POSITION ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    19. VIEW, LOOKING SOUTHWEST, SHOWING BRIDGE IN CLOSED POSITION - New York, New Haven & Hartford Railroad, Niantic Bridge, Spanning Niantic River between East Lyme & Waterford, Old Lyme, New London County, CT

  1. 2. HISTORIC PHOTOGRAPH, VIEW TO WEST ROCKS ROAD BRIDGE, CA. ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    2. HISTORIC PHOTOGRAPH, VIEW TO WEST ROCKS ROAD BRIDGE, CA. 1940. COLLECTION CONNECTICUT DEPARTMENT OF TRANSPORTATION. - Merritt Parkway, West Rocks Road Bridge, Spanning Merritt Parkway, Norwalk, Fairfield County, CT

  2. 16. PHOTOCOPY OF HISTORIC PHOTO SHOWING THE BRIDGE AND ORIGINAL ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    16. PHOTOCOPY OF HISTORIC PHOTO SHOWING THE BRIDGE AND ORIGINAL LIGHTING FIXTURES, VIEW EAST - Menominee River Bridge, Spanning Menominee River at County Truck Higway "K", Amberg, Marinette County, WI

  3. General perspective view of the Spring Creek Bridge, view looking ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    General perspective view of the Spring Creek Bridge, view looking northwest. - Spring Creek Bridge, Spanning Spring Creek at Milepoint 253.98 on Oregon to California Highway (US Route 97), Chiloquin, Klamath County, OR

  4. Approach view of the Spring Creek Bridge, view looking south. ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    Approach view of the Spring Creek Bridge, view looking south. - Spring Creek Bridge, Spanning Spring Creek at Milepoint 253.98 on Oregon to California Highway (US Route 97), Chiloquin, Klamath County, OR

  5. Topographic view of the Spring Creek Bridge and Collier State ...

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    Topographic view of the Spring Creek Bridge and Collier State Park, view looking east. - Spring Creek Bridge, Spanning Spring Creek at Milepoint 253.98 on Oregon to California Highway (US Route 97), Chiloquin, Klamath County, OR

  6. Approach view of the Spring Creek Bridge, view looking north. ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    Approach view of the Spring Creek Bridge, view looking north. - Spring Creek Bridge, Spanning Spring Creek at Milepoint 253.98 on Oregon to California Highway (US Route 97), Chiloquin, Klamath County, OR

  7. General perspective view of the Spring Creek Bridge, view looking ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    General perspective view of the Spring Creek Bridge, view looking southeast. - Spring Creek Bridge, Spanning Spring Creek at Milepoint 253.98 on Oregon to California Highway (US Route 97), Chiloquin, Klamath County, OR

  8. Elevation view of the Spring Creek Bridge, view looking east. ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    Elevation view of the Spring Creek Bridge, view looking east. - Spring Creek Bridge, Spanning Spring Creek at Milepoint 253.98 on Oregon to California Highway (US Route 97), Chiloquin, Klamath County, OR

  9. General perspective view of the Spring Creek Bridge, view looking ...

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    General perspective view of the Spring Creek Bridge, view looking east. - Spring Creek Bridge, Spanning Spring Creek at Milepoint 253.98 on Oregon to California Highway (US Route 97), Chiloquin, Klamath County, OR

  10. 22. Detail taken from center of bridge showing upper structure ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    22. Detail taken from center of bridge showing upper structure and roadway, from northwest. - Brady Street Bridge, Spanning Monongahela River at South Twenty-second Street, Pittsburgh, Allegheny County, PA

  11. Superstructure Main Bridge, Cross Sections, Cantilever Structure Huey ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    Superstructure - Main Bridge, Cross Sections, Cantilever Structure - Huey P. Long Bridge, Spanning Mississippi River approximately midway between nine & twelve mile points upstream from & west of New Orleans, Jefferson, Jefferson Parish, LA

  12. 12. VIEW OF SOUTH BRIDGE PIER, UNDERSTRUCTURE, END POSTS AND ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    12. VIEW OF SOUTH BRIDGE PIER, UNDER-STRUCTURE, END POSTS AND PORTAL STRUT; FACING SOUTHWEST. - Walker Bridge, Spanning Klamath River and connecting Highway 96 and Walker Road, Klamath River, Siskiyou County, CA

  13. 12. VIEW WESTWARD OF THE PENSTOCK (HEADRACE) BRIDGE AND SURVIVING ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    12. VIEW WESTWARD OF THE PENSTOCK (HEADRACE) BRIDGE AND SURVIVING GATE STRUCTURE - Wagamon Pond Dam & Bridge, Spanning Broadkill River at State Road No. 197 (Mulberry Street), Milton, Sussex County, DE

  14. 7. DETAIL VIEW OF WEST SIDE OF WEST BRIDGE ABUTMENT ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    7. DETAIL VIEW OF WEST SIDE OF WEST BRIDGE ABUTMENT AND UNKNOWN STRUCTURE FROM BELOW, FACING NORTHWEST - West Branch Bridge, South Carolina Road S-569 spanning West Branch of Pacolet River, Pacolet, Spartanburg County, SC

  15. 3. General perspective view of Sellwood Bridge, view from west ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    3. General perspective view of Sellwood Bridge, view from west looking east across the Willamette River, north side of structure. - Sellwood Bridge, Spanning Willamette River at Southeast Tacoma Street, Portland, Multnomah County, OR

  16. 1. OVERVIEW OF BRIDGE STRUCTURE ON ESCALANTE RIVER, LOOKING NORTHNORTHWEST ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    1. OVERVIEW OF BRIDGE STRUCTURE ON ESCALANTE RIVER, LOOKING NORTH-NORTHWEST - Escalante River Bridge, Spanning Escalante River at State Route 12, 9.5 miles East of Escalante, Escalante, Garfield County, UT

  17. 4. General perspective view of Sellwood Bridge, north side of ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    4. General perspective view of Sellwood Bridge, north side of structure, view from east, looking west across the Willamette River. - Sellwood Bridge, Spanning Willamette River at Southeast Tacoma Street, Portland, Multnomah County, OR

  18. 2. View of Clear Creek Bridge railing and understructure, looking ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    2. View of Clear Creek Bridge railing and under-structure, looking northwest. - Zion-Mount Carmel Highway, 62-foot Concrete Arch Pine Creek Bridge, Spanning Clear Creek, Springdale, Washington County, UT

  19. 55. Gradeseparation bridge over the Chicago, Burlington and Quincy Railroad, ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    55. Grade-separation bridge over the Chicago, Burlington and Quincy Railroad, looking southwest from north approach from Wisconsin State Highway 35 - Bridge No. 5930, Spanning Mississippi River at Trunk Highway 43, Winona, Winona County, MN

  20. 54. Gradeseparation bridge over the Chicago, Burlington and Quincy Railroad, ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    54. Grade-separation bridge over the Chicago, Burlington and Quincy Railroad, looking northeast from south approach - Bridge No. 5930, Spanning Mississippi River at Trunk Highway 43, Winona, Winona County, MN

  1. 53. Gradeseparation bridge over the Chicago, Burlington and Quincy Railroad ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    53. Grade-separation bridge over the Chicago, Burlington and Quincy Railroad and earthen dike, looking north from south approach - Bridge No. 5930, Spanning Mississippi River at Trunk Highway 43, Winona, Winona County, MN

  2. 56. Gradeseparation bridge over the Chicago, Burlington and Quincy Railroad, ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    56. Grade-separation bridge over the Chicago, Burlington and Quincy Railroad, looking south from north approach - Bridge No. 5930, Spanning Mississippi River at Trunk Highway 43, Winona, Winona County, MN

  3. 57. Gradeseparation bridge over the Chicago, Burlington and Quincy Railroad, ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    57. Grade-separation bridge over the Chicago, Burlington and Quincy Railroad, looking south from north approach from Wisconsin State Highway 35 - Bridge No. 5930, Spanning Mississippi River at Trunk Highway 43, Winona, Winona County, MN

  4. 1. Post card view of the bridge, c. 1910. Post ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    1. Post card view of the bridge, c. 1910. Post card courtesy Carol Poh Miller. Photocopy by Berni Rich, Score Photographers Cleveland, OH - B & O Railroad Bridge Number 464, Spanning Old Ship Canal & Cuyahoga River, Cleveland, Cuyahoga County, OH

  5. 23. Photocopy of 1979 engineering drawing. 'IN DEPTH BRIDGE INSPECTION, ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    23. Photocopy of 1979 engineering drawing. 'IN DEPTH BRIDGE INSPECTION, LEWISBURG, UNION COUNTY,' SHOWING FRAMING PLAN AND STRESS DIAGRAM. (Courtesy of the Pennsylvania Department of Transportation.) - St. Anthony Street Bridge, Spanning Buffalo Creek, Legislative Route 59024, Lewisburg, Union County, PA

  6. 12. OVERALL VIEW OF PANEL 4 FROM BENEATH THE BRIDGE, ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    12. OVERALL VIEW OF PANEL 4 FROM BENEATH THE BRIDGE, SHOWING MAIN GIRDERS, FLOOR BEAMS & STRINGERS, LATERAL BRACING, AND PIERS 3 & 2, LOOKING EAST Ryan & Harms - Benton Street Bridge, Spanning Iowa River at Benton Street, Iowa City, Johnson County, IA

  7. 14. BRIDGE ABUTMENT AND ARCH TRUSS MOUNTING PLATE SHOWING EYEBAR ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    14. BRIDGE ABUTMENT AND ARCH TRUSS MOUNTING PLATE SHOWING EYE-BAR CONNECTION AND EYE-BAR PIN LOCATION - Spruce Street Bridge, East Spruce Street, 500 Block, spanning Power Canal, Sault Ste. Marie, Chippewa County, MI

  8. 8. Detail of underside of bridge deck, from the southern ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    8. Detail of underside of bridge deck, from the southern end looking toward north-northwest. - Bridge No. 4800, Spanning Minnesota River on Trunk Highway 4 between Brown & Nicollet Counties, Sleepy Eye, Brown County, MN

  9. 6. General view of Marquam Bridge, taken from southeast looking ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    6. General view of Marquam Bridge, taken from southeast looking northwest from Oregon Museum of Science and Industry (OMSI) courtyard. - Marquam Bridge, Spanning Willamette River at Interstate Highway 5, Portland, Multnomah County, OR

  10. BAYONNE BRIDGE LOOKING EAST, BAYONNE TO THE LEFT (CONTACT PRINT ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    BAYONNE BRIDGE LOOKING EAST, BAYONNE TO THE LEFT (CONTACT PRINT MADE FROM 5 1/4" X 4 1/2" NEGATIVE) - Bayonne Bridge, Spanning Kill Van Kull between Bayonne & Staten Island, Bayonne, Hudson County, NJ

  11. SPRINGING OF THE ARCH, SOUTH END OF BRIDGE, STATEN ISLAND ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    SPRINGING OF THE ARCH, SOUTH END OF BRIDGE, STATEN ISLAND SIDE (CONTACT PRINT MADE FROM 5 1/4" X 4 1/2" NEGATIVE) - Bayonne Bridge, Spanning Kill Van Kull between Bayonne & Staten Island, Bayonne, Hudson County, NJ

  12. 12. DETAIL OF UNDERSIDE OF BRIDGE, SHOWING LOWER CHORDS, FLOOR ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    12. DETAIL OF UNDERSIDE OF BRIDGE, SHOWING LOWER CHORDS, FLOOR BEAMS, STRINGERS AND UNDERSIDE OF STEEL DECKING. VIEW TO WEST. - Whispering Pines Bridge, Spanning East Verde River at Forest Service Control Road, Payson, Gila County, AZ

  13. 11. DETAIL OF BRIDGE DECK, SHOWING UPPER CHORDS, VERTICALS, DIAGONALS ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    11. DETAIL OF BRIDGE DECK, SHOWING UPPER CHORDS, VERTICALS, DIAGONALS AND GUARDRAILS. VIEW TO WEST. - Whispering Pines Bridge, Spanning East Verde River at Forest Service Control Road, Payson, Gila County, AZ

  14. 2. PORTAL VIEW OF BRIDGE FROM NORTH SIDE OF SANITARY ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    2. PORTAL VIEW OF BRIDGE FROM NORTH SIDE OF SANITARY AND SHIP CANAL, LOOKING SOUTHEAST. - Chicago, Madison & Northern Railroad, Sanitary & Ship Canal Bridge, Spanning Sanitary & Ship Canal, east of Kedzie Avenue, Chicago, Cook County, IL

  15. 7. Cable Creek Bridge after completion. Zion National Park negative ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    7. Cable Creek Bridge after completion. Zion National Park negative number 1485, classification series 002, 12. - Floor of the Valley Road, Cable Creek Bridge, Spanning Cable Creek on Floor of Valley, Springdale, Washington County, UT

  16. 13. Roadway view on 1927 bridge looking north from Crockett ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    13. Roadway view on 1927 bridge looking north from Crockett at on-coming I80 west-bound traffic. Photo taken from Pier 5. - Carquinez Bridge, Spanning Carquinez Strait at Interstate 80, Vallejo, Solano County, CA

  17. 1. General view across bridge at traffic level; view to ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    1. General view across bridge at traffic level; view to west. - Fifth Street Bridge, Spanning MBTA Fitchburg Commuter Rail Line tracks, Conrail Fitchburg Secondary Line & North Nashua River, Fitchburg, Worcester County, MA

  18. 3. General view across bridge at traffic level; view to ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    3. General view across bridge at traffic level; view to east. - Fifth Street Bridge, Spanning MBTA Fitchburg Commuter Rail Line tracks, Conrail Fitchburg Secondary Line & North Nashua River, Fitchburg, Worcester County, MA

  19. 2. General view across bridge and western approach at traffic ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    2. General view across bridge and western approach at traffic level; view to east. - Fifth Street Bridge, Spanning MBTA Fitchburg Commuter Rail Line tracks, Conrail Fitchburg Secondary Line & North Nashua River, Fitchburg, Worcester County, MA

  20. 11. VIEW SOUTHWARD OF THE PENSTOCK BRIDGE, SHOWING THE SURVIVING ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    11. VIEW SOUTHWARD OF THE PENSTOCK BRIDGE, SHOWING THE SURVIVING UPSTREAM (WEST) WALL STRUCTURE - Wagamon Pond Dam & Bridge, Spanning Broadkill River at State Road No. 197 (Mulberry Street), Milton, Sussex County, DE

  1. 4. SHOWING BRIDGE AT UPPER LEFT, UPPER FALLS AND TOP ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    4. SHOWING BRIDGE AT UPPER LEFT, UPPER FALLS AND TOP OF MAIN WATERFALL, FACING NORTHEAST - Paradise River First Crossing Bridge, Spanning Paradise River at Narada Falls on Service Road, Longmire, Pierce County, WA

  2. 5. VIEW EAST ACROSS BRIDGE SHOWING RAILING DETAILS AND WATERFALLS ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    5. VIEW EAST ACROSS BRIDGE SHOWING RAILING DETAILS AND WATERFALLS OF THE SOUTH FORK OF THE TUOLUMNE. - South Fork Tuolumne River Bridge, Spanning South Fork Tuolumne River on Tioga Road, Mather, Tuolumne County, CA

  3. 1. VIEW EAST, GENERAL VIEW OF BRIDGE WITHIN SETTING, WILLIMANTIC ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    1. VIEW EAST, GENERAL VIEW OF BRIDGE WITHIN SETTING, WILLIMANTIC LINEN COMPANY MILL NO. 1 ON LEFT, RIVER IMPOUNDED BY MILL DAM IN FOREGROUND - Windham Road Bridge, Windham Road, spanning Willimantic River, Windham, Windham County, CT

  4. 1. FORMER DENVER, SOUTH PARK AND PACIFIC RAILROAD BRIDGE OVER ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    1. FORMER DENVER, SOUTH PARK AND PACIFIC RAILROAD BRIDGE OVER CHALK CREEK, NEAR MT. PRINCETON HOT SPRINGS. VIEW DOWNSTREAM - Denver South Park & Pacific Railroad Bridge, Spanning Chalk Creek, near Mount Princeton Hot Spring, Romley (historical), Chaffee County, CO

  5. 2. FORMER DENVER, SOUTH PARK AND PACIFIC RAILROAD BRIDGE OVER ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    2. FORMER DENVER, SOUTH PARK AND PACIFIC RAILROAD BRIDGE OVER CHALK CREEK, NEAR MT. PRINCETON HOT SPRINGS. VIEW UPSTREAM - Denver South Park & Pacific Railroad Bridge, Spanning Chalk Creek, near Mount Princeton Hot Spring, Romley (historical), Chaffee County, CO

  6. 7. DETAIL VIEW UNDER BRIDGE OF CORRUGATED STEEL, BEAMS, RODS, ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    7. DETAIL VIEW UNDER BRIDGE OF CORRUGATED STEEL, BEAMS, RODS, AND ABUTMENT - Price River Bridge, Spanning Price River, 760 North Street in Carbonville, 1 mile northwest of Price, Carbonville, Carbon County, UT

  7. 3. CONTEXTUAL VIEW OF BRIDGE, LOOKING NORTHEAST FROM THE ROOF ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    3. CONTEXTUAL VIEW OF BRIDGE, LOOKING NORTHEAST FROM THE ROOF OF THE FEDERAL RESERVE BANK IN BOSTON - Congress Street Bascule Bridge, Spanning Fort Point Channel at Congress Street, Boston, Suffolk County, MA

  8. 24. Moody Bridge truss repair plans showing existing area of ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    24. Moody Bridge truss repair plans showing existing area of damage along with repair procedures for correcting damage and returning truss to structural integrity. - Moody Bridge, Spanning South Fork Eel River, Garberville, Humboldt County, CA

  9. 10. DETAIL OF PIPEWORK FOR OPERATION OF BRIDGE LOCKING SYSTEM ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    10. DETAIL OF PIPEWORK FOR OPERATION OF BRIDGE LOCKING SYSTEM - New York, New Haven & Hartford Railroad, Niantic Bridge, Spanning Niantic River between East Lyme & Waterford, Old Lyme, New London County, CT

  10. 7. DETAIL VIEW OF SOUTHWESTERN CORNER OF BRIDGE AND FOUNDATION, ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    7. DETAIL VIEW OF SOUTHWESTERN CORNER OF BRIDGE AND FOUNDATION, SHOWING TRACES OF CONCRETE POURING DURING CONSTRUCTION AND EMBEDDED IRON HARDWARE ON OUTER FACE OF PARAPET. FACING NORTHEAST - Brevard Bridge, Spanning Westland Run at Ullom Road, Export, Washington County, PA

  11. View of Tensaw River Bridge, looking northeast. Photograph taken from ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    View of Tensaw River Bridge, looking northeast. Photograph taken from observation deck of Battleship USS Alabama - Tensaw River Lift Bridge, Spanning Tensaw River at U.S. Highway 90, Mobile, Mobile County, AL

  12. 1. West side of bridge. Overall contextual view (looking) eastsoutheast ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    1. West side of bridge. Overall contextual view (looking) east-southeast or upstream. (Deer Creek flows east to west). 90mm lens. - Gault Bridge, Spanning Deer Creek at South Pine Street, Nevada City, Nevada County, CA

  13. WILLIAMSBURG BRIDGE OVER THE EAST RIVER LOOKING SOUTH TOWARDS BROOKLYN ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    WILLIAMSBURG BRIDGE OVER THE EAST RIVER LOOKING SOUTH TOWARDS BROOKLYN ON THE LEFT AND MANHATTAN ON THE RIGHT - Williamsburg Bridge, Spanning East River at South Sixth Street between New York City & Brooklyn, New York County, NY

  14. 12. VIEW FROM PARKWAY MEDIAN TO SPORT HILL ROAD BRIDGE, ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    12. VIEW FROM PARKWAY MEDIAN TO SPORT HILL ROAD BRIDGE, Copy of photograph ca. 1940. Collection Connecticut Department of Transportation. - Merritt Parkway, Bridge No. 744, Spanning Merritt Parkway at Route 59, Fairfield, Fairfield County, CT

  15. 10. AN IMAGE, LOOKING DUE NORTH OF THE BRIDGE DECK, ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    10. AN IMAGE, LOOKING DUE NORTH OF THE BRIDGE DECK, SHOWING LAYERS OF GRAVEL, ASPHALT AND TIMBER. - Wells County Bridge No. 74, Spanning Rock Creek Ditch at County Road 400, Bluffton, Wells County, IN

  16. 9. Detail of east web of bridge, showing end post, ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    9. Detail of east web of bridge, showing end post, verticals, diagonals and lateral bracing. View to southwest. - Lupus Bridge, Spanning Splice Creek at Moniteau County Road 4, Lupus, Moniteau County, MO

  17. 5. TIGHTER OVERALL VIEW OF EAST SIDE OF BRIDGE. TAKEN ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    5. TIGHTER OVERALL VIEW OF EAST SIDE OF BRIDGE. TAKEN FROM CLOSER IN AT LOW TIDE. LOOKING FROM EAST TO THE WEST. - Ducktrap Bridge, Spanning Ducktrap River at U.S. Route 1, Lincolnville, Waldo County, ME

  18. 2. OVERALL VIEW OF BRIDGE AND MISSISSIPPI RIVER, FROM WEST ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    2. OVERALL VIEW OF BRIDGE AND MISSISSIPPI RIVER, FROM WEST RIVER-BANK. VIEW TO SOUTHEAST. - MacArthur Bridge, Spanning Mississippi River on Highway 34 between IA & IL, Burlington, Des Moines County, IA

  19. 1. OVERALL VIEW OF BRIDGE AND MISSISSIPPI RIVER, FROM EAST ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    1. OVERALL VIEW OF BRIDGE AND MISSISSIPPI RIVER, FROM EAST RIVER-BANK. VIEW TO NORTHWEST. - MacArthur Bridge, Spanning Mississippi River on Highway 34 between IA & IL, Burlington, Des Moines County, IA

  20. 3. OVERALL VIEW OF BRIDGE AND MISSISSIPPI RIVER, FROM WEST ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    3. OVERALL VIEW OF BRIDGE AND MISSISSIPPI RIVER, FROM WEST RIVER-BLUFF. VIEW TO SOUTHEAST. - MacArthur Bridge, Spanning Mississippi River on Highway 34 between IA & IL, Burlington, Des Moines County, IA

  1. 3. BARREL VIEW, LOOKING DOWN LENGTH OF BRIDGE, SHOWING MAKER'S ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    3. BARREL VIEW, LOOKING DOWN LENGTH OF BRIDGE, SHOWING MAKER'S PLATE, DECORATIVE SCROLLWORK AND URN FINIALS ON NORTHEAST PORTAL - "Forder" Pratt Through Truss Bridge, Spanning Maumee River at County Route 73, Antwerp, Paulding County, OH

  2. LODGEPOLE BRIDGE, NORTH ELEVATION, FACING SOUTHWEST Generals Highway, Lodge ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    LODGEPOLE BRIDGE, NORTH ELEVATION, FACING SOUTHWEST - Generals Highway, Lodge Pole Bridge, Spanning Marble Fork of Kaweah River, approximately 21 miles northwest of Ash Mountain Entrance, Three Rivers, Tulare County, CA

  3. LODGEPOLE BRIDGE, SOUTH ELEVATION, FACING EAST Generals Highway, Lodge ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    LODGEPOLE BRIDGE, SOUTH ELEVATION, FACING EAST - Generals Highway, Lodge Pole Bridge, Spanning Marble Fork of Kaweah River, approximately 21 miles northwest of Ash Mountain Entrance, Three Rivers, Tulare County, CA

  4. LODGEPOLE BRIDGE DETAIL, FACING SOUTHEAST Generals Highway, Lodge Pole ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    LODGEPOLE BRIDGE DETAIL, FACING SOUTHEAST - Generals Highway, Lodge Pole Bridge, Spanning Marble Fork of Kaweah River, approximately 21 miles northwest of Ash Mountain Entrance, Three Rivers, Tulare County, CA

  5. LODGEPOLE BRIDGE, SOUTH ELEVATION, FACING NORTHWEST Generals Highway, Lodge ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    LODGEPOLE BRIDGE, SOUTH ELEVATION, FACING NORTHWEST - Generals Highway, Lodge Pole Bridge, Spanning Marble Fork of Kaweah River, approximately 21 miles northwest of Ash Mountain Entrance, Three Rivers, Tulare County, CA

  6. 6. DETAIL VIEW OF SINGLE PANEL POINTS TAKEN FROM BRIDGE ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    6. DETAIL VIEW OF SINGLE PANEL POINTS TAKEN FROM BRIDGE DECK, SHOWING CONNECTION BETWEEN VERTICAL AND UPPER CHORD MEMBER. - White Bowstring Arch Truss Bridge, Spanning Yellow Creek at Cemetery Drive (Riverside Drive), Poland, Mahoning County, OH

  7. DETAIL VIEW OF SINGLE PANEL POINTS TAKEN FROM BRIDGE DECK, ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    DETAIL VIEW OF SINGLE PANEL POINTS TAKEN FROM BRIDGE DECK, SHOWING CONNECTION BETWEEN VERTICAL AND UPPER CHORD MEMBER - White Bowstring Arch Truss Bridge, Spanning Yellow Creek at Cemetery Drive (Riverside Drive), Poland, Mahoning County, OH

  8. 11. DETAIL VIEW OF UNDERSIDE OF BRIDGE SHOWING DECK SUPPORT ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    11. DETAIL VIEW OF UNDERSIDE OF BRIDGE SHOWING DECK SUPPORT SYSTEM, LOOKING SOUTHWEST - Springfield-Des Arc Bridge, Spanning North Branch of Cadron Creek at Old Springfield-Des Arc Road (County Road 222), Springfield, Conway County, AR

  9. 1. GENERAL VIEW OF BOWSTRING TRUSS BRIDGE, LOOKING SOUTHEAST ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    1. GENERAL VIEW OF BOWSTRING TRUSS BRIDGE, LOOKING SOUTHEAST - Springfield-Des Arc Bridge, Spanning North Branch of Cadron Creek at Old Springfield-Des Arc Road (County Road 222), Springfield, Conway County, AR

  10. 8. DETAIL VIEW OF BRIDGE END BEARING CONDITION, LOOKING NORTHWEST ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    8. DETAIL VIEW OF BRIDGE END BEARING CONDITION, LOOKING NORTHWEST - Springfield-Des Arc Bridge, Spanning North Branch of Cadron Creek at Old Springfield-Des Arc Road (County Road 222), Springfield, Conway County, AR

  11. 10. DETAIL VIEW SHOWING BRIDGE SEAT AND PIER, LOOKING SOUTH ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    10. DETAIL VIEW SHOWING BRIDGE SEAT AND PIER, LOOKING SOUTH - Springfield-Des Arc Bridge, Spanning North Branch of Cadron Creek at Old Springfield-Des Arc Road (County Road 222), Springfield, Conway County, AR

  12. 15. DETAIL OF UNDERSIDE OF BRIDGE, SHOWING GIRDER, BEARING SHOE, ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    15. DETAIL OF UNDERSIDE OF BRIDGE, SHOWING GIRDER, BEARING SHOE, FLOOR BEAM, STRINGER AND LATERAL BRACING. VIEW TO NORTHWEST. - Rio Puerco Bridge, Mainline Road, spanning Rio Puerco, Holbrook, Navajo County, AZ

  13. 14. DETAIL OF UNDERSIDE OF BRIDGE, SHOWING GIRDERS, BEARING SHOES, ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    14. DETAIL OF UNDERSIDE OF BRIDGE, SHOWING GIRDERS, BEARING SHOES, FLOOR BEAMS, STRINGERS, LATERAL BRACING AND CONCRETE DECK. VIEW TO NORTH. - Rio Puerco Bridge, Mainline Road, spanning Rio Puerco, Holbrook, Navajo County, AZ

  14. 10. TRUSS DETAILS, BRIDGE OVER SCOTT SWAMP (Shop Drawing, Berlin ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    10. TRUSS DETAILS, BRIDGE OVER SCOTT SWAMP (Shop Drawing, Berlin Construction Company) Sheet 1 of 2, July 5, 1927 - Bridge No. 475, Spanning Pequabuck River on U.S. Route 6, Farmington, Hartford County, CT

  15. 11. FLOOR SYSTEM DETAILS, BRIDGE OVER SCOTT SWAMP (Shop Drawing, ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    11. FLOOR SYSTEM DETAILS, BRIDGE OVER SCOTT SWAMP (Shop Drawing, Berlin Construction Company) Sheet 2 of 2, July 9, 1927 - Bridge No. 475, Spanning Pequabuck River on U.S. Route 6, Farmington, Hartford County, CT

  16. 22. View of Clark Fork Vehicle Bridge facing downwest side. ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    22. View of Clark Fork Vehicle Bridge facing down-west side. Looking at road deck and vertical laced channel. - Clark Fork Vehicle Bridge, Spanning Clark Fork River, serves Highway 200, Clark Fork, Bonner County, ID

  17. 12. View of Clark Fork Vehicle Bridge facing south. Approach ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    12. View of Clark Fork Vehicle Bridge facing south. Approach from the north road. Plaque was originally located where striped traffic sign is posted. - Clark Fork Vehicle Bridge, Spanning Clark Fork River, serves Highway 200, Clark Fork, Bonner County, ID

  18. 18. View of Clark Fork Vehicle Bridge facing north. Looking ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    18. View of Clark Fork Vehicle Bridge facing north. Looking at north concrete abutment and timber stringers. - Clark Fork Vehicle Bridge, Spanning Clark Fork River, serves Highway 200, Clark Fork, Bonner County, ID

  19. 14. Fabrication of the Gault Bridge in the Eastern United ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    14. Fabrication of the Gault Bridge in the Eastern United States (exact location not known). Source: City Hall, Nevada City, California. - Gault Bridge, Spanning Deer Creek at South Pine Street, Nevada City, Nevada County, CA

  20. View of approach span and movable span, looking southeast from ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    View of approach span and movable span, looking southeast from navy land. Note that navigational channel exists only on north side of movable span. - Naval Supply Annex Stockton, Rough & Ready Island, Stockton, San Joaquin County, CA

  1. 6. VIEW OF BRIDGE, LOOKING WEST FROM THE ARROYO SECO. ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    6. VIEW OF BRIDGE, LOOKING WEST FROM THE ARROYO SECO. THE PARKER-MAYBERRY BRIDGE IS IN THE LEFT FOREGROUND, AND THE PIONEER BRIDGE CAN BE SEEN IN THE DISTANCE. - Colorado Street Bridge, Spanning Arroyo Seco at Colorado Boulevard, Pasadena, Los Angeles County, CA

  2. 20. BLUEPRINT, RR BRIDGE MISSISSIPPI, CLAY CO., WAVERLY L.% MI. ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    20. BLUEPRINT, RR BRIDGE MISSISSIPPI, CLAY CO., WAVERLY L.% MI. S of MS. 50 Proposed bridge, by Phoenis Bridge Co., Phoenixville, Pa. 218-foot turn span, with load bearing. 21 May 1914. Act. size: 16X35 in. Credit: Columbus and Greenville RR, Columbus, Ms. Sarcone Photography, Columbus, Ms. Sept 1978. - Bridges of the Upper Tombigbee River Valley, Columbus, Lowndes County, MS

  3. 33 CFR 118.65 - Lights on fixed bridges.

    Code of Federal Regulations, 2013 CFR

    2013-07-01

    ... bridge span structure so as to be visible from an approaching vessel. Each red light shall show through a... securely mounted on the bridge structure and spaced as nearly 15 feet apart as the structure of the bridge... 33 Navigation and Navigable Waters 1 2013-07-01 2013-07-01 false Lights on fixed bridges....

  4. 33 CFR 118.65 - Lights on fixed bridges.

    Code of Federal Regulations, 2011 CFR

    2011-07-01

    ... bridge span structure so as to be visible from an approaching vessel. Each red light shall show through a... securely mounted on the bridge structure and spaced as nearly 15 feet apart as the structure of the bridge... 33 Navigation and Navigable Waters 1 2011-07-01 2011-07-01 false Lights on fixed bridges....

  5. 33 CFR 118.65 - Lights on fixed bridges.

    Code of Federal Regulations, 2012 CFR

    2012-07-01

    ... bridge span structure so as to be visible from an approaching vessel. Each red light shall show through a... securely mounted on the bridge structure and spaced as nearly 15 feet apart as the structure of the bridge... 33 Navigation and Navigable Waters 1 2012-07-01 2012-07-01 false Lights on fixed bridges....

  6. 33 CFR 118.65 - Lights on fixed bridges.

    Code of Federal Regulations, 2014 CFR

    2014-07-01

    ... bridge span structure so as to be visible from an approaching vessel. Each red light shall show through a... securely mounted on the bridge structure and spaced as nearly 15 feet apart as the structure of the bridge... 33 Navigation and Navigable Waters 1 2014-07-01 2014-07-01 false Lights on fixed bridges....

  7. 2. VIEW SHOWING SOUTH ELEVATION OF BRIDGE, LOOKING NORTH. THE ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    2. VIEW SHOWING SOUTH ELEVATION OF BRIDGE, LOOKING NORTH. THE ROCK ISLAND LINE RAILROAD BRIDGE CAN BE SEEN IN THE BACKGROUND TO THE NORTH, WITH THE BURLINGTON STREET BRIDGE IN THE DISTANCE Ryan - Benton Street Bridge, Spanning Iowa River at Benton Street, Iowa City, Johnson County, IA

  8. 8. View of bridges looking northeast from Crockett. The 1927 ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    8. View of bridges looking northeast from Crockett. The 1927 bridge is to the left. Entrance and exit ramps for west-bound 1-80 traffic over the 1927 bridge are visible in the center-right of the image. - Carquinez Bridge, Spanning Carquinez Strait at Interstate 80, Vallejo, Solano County, CA

  9. UNIDENTIFIED SUSPENSION BRIDGE UNDER CONSTRUCTION, SHOWING PIPE INVENTORY AND CUTTING ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    UNIDENTIFIED SUSPENSION BRIDGE UNDER CONSTRUCTION, SHOWING PIPE INVENTORY AND CUTTING EQUIPMENT IN FOREGROUND, BRIDGE BUILDER WILLIAM FLINN’S “CAMP & BRIDGE BUILDING OUTFIT” IN RIGHT BACKGROUND, AND FALSEWORK FOR TOWER IN CENTER BACKGROUND. - Clear Fork of Brazos River Suspension Bridge, Spanning Clear Fork of Brazos River at County Route 179, Albany, Shackelford County, TX

  10. 13. Looking north, from the southern approach to the bridge. ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    13. Looking north, from the southern approach to the bridge. The bridge deck, which is concrete with several patch coats of asphalt (now chiefly gravel and some turf), demonstrates a sharp gradient from the abutment to the bridge center line. - Vigo County Bridge No. 139, Spanning Sugar Creek at Seventy-fourth Place, Terre Haute, Vigo County, IN

  11. Social network sampling using spanning trees

    NASA Astrophysics Data System (ADS)

    Jalali, Zeinab S.; Rezvanian, Alireza; Meybodi, Mohammad Reza

    2016-12-01

    Due to the large scales and limitations in accessing most online social networks, it is hard or infeasible to directly access them in a reasonable amount of time for studying and analysis. Hence, network sampling has emerged as a suitable technique to study and analyze real networks. The main goal of sampling online social networks is constructing a small scale sampled network which preserves the most important properties of the original network. In this paper, we propose two sampling algorithms for sampling online social networks using spanning trees. The first proposed sampling algorithm finds several spanning trees from randomly chosen starting nodes; then the edges in these spanning trees are ranked according to the number of times that each edge has appeared in the set of found spanning trees in the given network. The sampled network is then constructed as a sub-graph of the original network which contains a fraction of nodes that are incident on highly ranked edges. In order to avoid traversing the entire network, the second sampling algorithm is proposed using partial spanning trees. The second sampling algorithm is similar to the first algorithm except that it uses partial spanning trees. Several experiments are conducted to examine the performance of the proposed sampling algorithms on well-known real networks. The obtained results in comparison with other popular sampling methods demonstrate the efficiency of the proposed sampling algorithms in terms of Kolmogorov-Smirnov distance (KSD), skew divergence distance (SDD) and normalized distance (ND).

  12. 6. VIEW OF GDOT BRIDGE NO. 02700268X00678N BRIDGE PLATE IDENTIFYING ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    6. VIEW OF GDOT BRIDGE NO. 027-00268X-00678N BRIDGE PLATE IDENTIFYING COUNTY COMMISSIONERS AT THE TIME OF CONSTRUCTION. - GDOT Bridge No. 027-00268X-00678N, County Road 268-Empress Road span Piscola Creek, Quitman, Brooks County, GA

  13. Climbing techniques for bridge inspection

    NASA Astrophysics Data System (ADS)

    Kaslan, Erol C.

    1998-03-01

    California has about 24,000 publicly owned bridges that require routine structural evaluations to comply with National Bridge Inspection Standard (NBIS) mandates. Of these, about 800 are identified as possessing fatigue prone or fracture critical details requiring thorough tactile investigations. Gaining access to bridge elements to perform these investigations has become increasingly difficult and costly. The traditional uses of under bridge inspection trucks, lift equipment and rigging are economically and practically limited by bridge size, structure type, traffic demands and support costs. In some cases, bridges that have become damaged by earthquakes cannot safely support the loads of heavy personnel lift equipment. The California Department of Transportation (Caltrans)'s Office of Structural Materials and Office of Structure Maintenance and Investigations evaluated the use of rock climbing and mountaineering techniques as an alternative means of gaining access for bridge inspections. Under a small research grant, a bridge climbing training course was developed through a local University of California outdoor recreation group and 7 engineers and technicians were initially trained. A comprehensive Code of Safe Practices was created and standards of training, procedures and equipment required for bridge inspections were established. A successful climb investigation on a large, previously inaccessible arch bridge was completed at the end of the training that proved the techniques safe, economical and effective. Within one year, 20 bridge maintenance engineers were trained, and a formal program was established to organize, schedule, equip and certify engineers and technicians for bridge climbing. Several other offices within Caltrans as well as the California Department of Water Resources have since adopted these techniques for specialized structural inspection tasks. Climbing techniques are now used routinely in California as an alterative means of gaining access

  14. Span efficiency in hawkmoths

    PubMed Central

    Henningsson, Per; Bomphrey, Richard J.

    2013-01-01

    Flight in animals is the result of aerodynamic forces generated as flight muscles drive the wings through air. Aerial performance is therefore limited by the efficiency with which momentum is imparted to the air, a property that can be measured using modern techniques. We measured the induced flow fields around six hawkmoth species flying tethered in a wind tunnel to assess span efficiency, ei, and from these measurements, determined the morphological and kinematic characters that predict efficient flight. The species were selected to represent a range in wingspan from 40 to 110 mm (2.75 times) and in mass from 0.2 to 1.5 g (7.5 times) but they were similar in their overall shape and their ecology. From high spatio-temporal resolution quantitative wake images, we extracted time-resolved downwash distributions behind the hawkmoths, calculating instantaneous values of ei throughout the wingbeat cycle as well as multi-wingbeat averages. Span efficiency correlated positively with normalized lift and negatively with advance ratio. Average span efficiencies for the moths ranged from 0.31 to 0.60 showing that the standard generic value of 0.83 used in previous studies of animal flight is not a suitable approximation of aerodynamic performance in insects. PMID:23658113

  15. Bridge permeameter

    DOEpatents

    Graf, D.C.; Warpinski, N.R.

    1996-08-13

    A system is described for single-phase, steady-state permeability measurements of porous rock which utilizes a fluid bridge arrangement analogous to a Wheatstone bridge. The arms of the bridge contain the sample and calibrated flow resistors. 8 figs.

  16. 38. Photographic copy of original construction plan (Wabasha Street Bridge, ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    38. Photographic copy of original construction plan (Wabasha Street Bridge, Detail of South Cantilever Arm, 1888); web details of cantilever arm connecting second pier to third span - Wabasha Street Bridge, Spanning Mississippi River at Wabasha Street, Saint Paul, Ramsey County, MN

  17. VIEW OF APALACHICOLA RIVER BRIDGE EAST APPROACH (LIBERTY COUNTY SIDE) ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    VIEW OF APALACHICOLA RIVER BRIDGE EAST APPROACH (LIBERTY COUNTY SIDE) SHOWING SPAN (OR BAY) BETWEEN X-BRACED STEEL COLUMN BENT AND X-BRACED STEEL "TOWER" BENT, WEST SIDE, FACING NORTHEAST - Apalachicola River Bridge, State Route 20 spanning the Apalachicola River, Blountstown, Calhoun County, FL

  18. VIEW OF APALACHICOLA RIVER BRIDGE EAST APPROACH (LIBERTY COUNTY SIDE) ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    VIEW OF APALACHICOLA RIVER BRIDGE EAST APPROACH (LIBERTY COUNTY SIDE) SHOWING SPAN (OR BAY) BETWEEN X-BRACED STEEL COLUMN BENT AND PIER 6, WEST SIDE, FACING NORTHEAST - Apalachicola River Bridge, State Route 20 spanning the Apalachicola River, Blountstown, Calhoun County, FL

  19. 10. Detail and contextual view of bridge and adjacent farmstead ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    10. Detail and contextual view of bridge and adjacent farmstead setting. Note laced vertical compression members, latticed portal strut, decorative strut bracing, and lightness of diagonal and lateral tension members. View to southeast through southeast portal from truss mid-span. - Red Bank Creek Bridge, Spanning Red Bank Creek at Rawson Road, Red Bluff, Tehama County, CA

  20. 10. OVERALL VIEW OF BRIDGE, WITH WEST DECK TRUSS APPROACH ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    10. OVERALL VIEW OF BRIDGE, WITH WEST DECK TRUSS APPROACH SPAN AND PIER NO. 1 IN FOREGROUND, FROM WEST RIVERBANK. VIEW TO NORTHEAST. - MacArthur Bridge, Spanning Mississippi River on Highway 34 between IA & IL, Burlington, Des Moines County, IA

  1. Detail, L, connection of west truss (north span) from northwest ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    Detail, L, connection of west truss (north span) from northwest and below, showing pin connection at L, bottom chord, floor beam, stringers, and portion of lateral bracing and concrete deck - Castle Garden Bridge, Township Route 343 over Bennetts Branch of Sinnemahoning Creek, Driftwood, Cameron County, PA

  2. Detail, U, connection of south span (west truss), from southeast ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    Detail, U, connection of south span (west truss), from southeast and below, showing pin connection at vertical member U-L top chord, inclined endpoint U-L diagonal eyebars, and lateral bracing including portion of portal strut with lattice bars and brace - Castle Garden Bridge, Township Route 343 over Bennetts Branch of Sinnemahoning Creek, Driftwood, Cameron County, PA

  3. 13. Axial view to south through truss span. In addition ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    13. Axial view to south through truss span. In addition to repaired vertical compression members visible on upstream (right) side and new sway bracing overhead, note also spliced diagonal tension member on downstream (left) side. - Stanislaus River Bridge, Atchison, Topeka & Santa Fe Railway at Stanislaus River, Riverbank, Stanislaus County, CA

  4. 92. Interstate 77 grade separation structure. This 377 four span ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    92. Interstate 77 grade separation structure. This 377 four span structure, built in 1974, is typical of most interstate bridges built in America in recent years, except for its curving alignment which helps control the visual experience of the parkway motorist. Facing west. - Blue Ridge Parkway, Between Shenandoah National Park & Great Smoky Mountains, Asheville, Buncombe County, NC

  5. ANOTHER DETAIL OF A TYPICAL SPAN, SHOWING THE SOUTH END ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    ANOTHER DETAIL OF A TYPICAL SPAN, SHOWING THE SOUTH END OF BRIDGE WITH ABUTMENT, WING WALLS, AND A FREE-STANDING PIER AT LEFT. OBLIQUE VIEW TO SOUTHEAST. 40 - Burlington Northern Santa Fe Railroad, Cajon Subdivision, Structure No. 61.5X, between Cajon Summit and Keenbrook, Devore, San Bernardino County, CA

  6. Detailed view top of center/pivot pier. The swing span revolves ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    Detailed view top of center/pivot pier. The swing span revolves on a cylindrical drum, supported by 40 20-inch diameter steel wheels running on a circular track, the truss loads being delivered to the drum by a system of distributing girder. Note the circular gear anchored to the top pier. Two (2) powered pinion gears, electric driven, turn the swing span bridge on the 25'-5' diameter circular track as the wheels and drum rotate. - Bridgeport Swing Span Bridge, Spanning Tennessee River, Bridgeport, Jackson County, AL

  7. Measurement of Deflection Line on Bridges

    NASA Astrophysics Data System (ADS)

    Urban, Rudolf; Štroner, Martin

    2013-12-01

    Prestressed concrete bridges are very sensitive to the increase in long-term deflections. Reliable forecasts of deflections of bridge structures during construction and durability are crucial for achieving good durability. The main results of measurements are the changes of the deflection line of the bridge structures, which places special demands on the measurement procedure. Results from measurements are very useful for the improvement of mathematical prediction methods of behaviour of long span prestressed concrete structures.

  8. 19. Stress sheet for the river span dated 7/13/12; revised ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    19. Stress sheet for the river span dated 7/13/12; revised Oct. 18 and 21, 1912. Drawing courtesy Office of the Cuyahoga County Engineer, Cleveland, Ohio. - Detroit Superior High Level Bridge, Cleveland, Cuyahoga County, OH

  9. DC66843 VIEW OF THE INDEPENDENCE AVENUE CORRIDOR SPANNED BY THE ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    DC-668-43 VIEW OF THE INDEPENDENCE AVENUE CORRIDOR SPANNED BY THE •DEPARTMENT OF AGRICULTURE BRIDGES, LOOKING WEST FROM TWELFTH STREET, SW - L'Enfant-McMillan Plan of Washington, DC, Washington, District of Columbia, DC

  10. 5. VIEW OF GEORGIA DOT BRIDGE NO. 05100025D01986N (JAMES P. ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    5. VIEW OF GEORGIA DOT BRIDGE NO. 051-00025D-01986N (JAMES P. HOULIHAN BRIDGE) FACING WEST SHOWING LOCATION OF FENDER SYSTEM FOR TURN-SPAN PIVOT PIER. - Georgia DOT Bridge No. 051-00025D-01986N, US 17 & State Route 25 Spanning Savannah River, Port Wentworth, Chatham County, GA

  11. 9. VIEW OF GEORGIA DOT BRIDGE NO. 05100025D01986N (JAMES P. ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    9. VIEW OF GEORGIA DOT BRIDGE NO. 051-00025D-01986N (JAMES P. HOULIHAN BRIDGE). DETAIL OF FENDER SYSTEM FOR TURN-SPAN PIVOT PIER. - Georgia DOT Bridge No. 051-00025D-01986N, US 17 & State Route 25 Spanning Savannah River, Port Wentworth, Chatham County, GA

  12. 7. ALABAMA, SUMTER CO., EPES RAILROAD BRIDGE Just off U.S. ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    7. ALABAMA, SUMTER CO., EPES RAILROAD BRIDGE Just off U.S. 11, N of Epes Copy of photo by Jack Donnell, Columbus, Ms. 1922. Picture of earlier bridge: turn span and fixed spans. Ala. Great Southern RR. Sarcone Photography, Columbus, Ms. Sep 1978. - Bridges of the Upper Tombigbee River Valley, Cochrane, Pickens County, AL

  13. 38. MISSISSIPPI, LOWNDES CO. COLUMBUS OLD ROAD BRIDGE End of ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    38. MISSISSIPPI, LOWNDES CO. COLUMBUS OLD ROAD BRIDGE End of Main St., Columbus Show/fabrication details of patented arch truss of Wrought Iron Bridge Co., Canton, Ohio. Taken from middle of swing span looking W toward arch span. Credit: Shenks Photography, Columbus, Ms, owner. O. Pruitt, photographer, ca. 1927-28. Sarcone Photography, Columbus, Ms. Sep 1978. - Bridges of the Upper Tombigbee River Valley, Columbus, Lowndes County, MS

  14. 49 CFR 236.312 - Movable bridge, interlocking of signal appliances with bridge devices.

    Code of Federal Regulations, 2013 CFR

    2013-10-01

    ... members within one inch of their proper positions and with the track rail on the movable span within three-eighths inch of correct surface and alinement with rail seating device on bridge abutment or fixed...

  15. 49 CFR 236.312 - Movable bridge, interlocking of signal appliances with bridge devices.

    Code of Federal Regulations, 2014 CFR

    2014-10-01

    ... members within one inch of their proper positions and with the track rail on the movable span within three-eighths inch of correct surface and alinement with rail seating device on bridge abutment or fixed...

  16. 49 CFR 236.312 - Movable bridge, interlocking of signal appliances with bridge devices.

    Code of Federal Regulations, 2010 CFR

    2010-10-01

    ... members within one inch of their proper positions and with the track rail on the movable span within three-eighths inch of correct surface and alinement with rail seating device on bridge abutment or fixed...

  17. 7. DETAIL VIEW OF BRIDGE DATEPLATE WHICH READS '1929, WHITE ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    7. DETAIL VIEW OF BRIDGE DATEPLATE WHICH READS '1929, WHITE RIVER BRIDGE, BUILT BY ARKANSAS HIGHWAY COMMISSION, DWIGHT BLACKWOOD, CHAIRMAN, JUSTIN MATTHEWS, J. LAN WILLIAMS, J.S. PARKS, SAM J. WILSON, COMMISSIONERS, C.S. CHRISTIAN, STATE HIGHWAY ENGINEER, IRA HEDRICK, INC., CONSULTING ENGINEERS, LIST & WEATHERLY, CONSTRUCTION CO.' - Newport Bridge, Spanning White River at State Highway 14, Newport, Jackson County, AR

  18. 2. CONTEXTUAL VIEW FROM UPSTREAM OF BRIDGE IN ITS SETTING, ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    2. CONTEXTUAL VIEW FROM UPSTREAM OF BRIDGE IN ITS SETTING, LOOKING SOUTH-SOUTHWEST FROM LOWER (RAILROAD) DECK OF SOUTHERN PACIFIC TRANSPORTATION COMPANY'S I STREET BRIDGE - Sacramento River Bridge, Spanning Sacramento River at California State Highway 275, Sacramento, Sacramento County, CA

  19. 8. 100 foot through truss underside of bridge, looking ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    8. 100 foot through truss - underside of bridge, looking north, showing the original concrete-filled cylinder pier, as well as the concrete, (extension), and 'I' beam additions used to raise the bridge level. This pier is the mid support for the two through trusses. - Weidemeyer Bridge, Spanning Thomes Creek at Rawson Road, Corning, Tehama County, CA

  20. "Bridge #6 Rock Creek: Castiron 48" pipe lines to ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    "Bridge #6 - Rock Creek: Cast-iron 48" pipe lines to Gravity - 1859." Construction photo of Pennsylvania Avenue Bridge, 1859. Photograph courtesy Washington Aqueduct Division, U.S. Army Corps of Engineers - Pennsylvania Avenue Bridge, Spanning Rock Creek & Potomac Parkway, Washington, District of Columbia, DC