File:Roadway, eye-bars, and north tower. - Three Sisters Bridges, Sixth Street Bridge, Spanning Allegheny River at Sixth Street, Pittsburgh, Allegheny County, PA HAER PA,2-PITBU,78A-3.tif

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Roadway, eye-bars, and north tower. - Three Sisters Bridges, Sixth Street Bridge, Spanning Allegheny River at Sixth Street, Pittsburgh, Allegheny County, PA
Photographer
Lowe, Jet, creator
Title
Roadway, eye-bars, and north tower. - Three Sisters Bridges, Sixth Street Bridge, Spanning Allegheny River at Sixth Street, Pittsburgh, Allegheny County, PA
Description
Covell, Vernon R; Nutter, A D; Roush, Stanley L; Wilkerson, T J; American Bridge Company; Foundation Company; Allegheny County Department of Public Works; Brown, Norman F; Richardson, George S; Arnold, Bion J; Clemente, Roberto; DeLony, Eric N, project manager; Pennsylvania Department of Transportation, sponsor; Pennsylvania Historical and Museum Commission, sponsor; Lowe, Jet, photographer; Berg, David C, photographer; Gordon, Susan H, delineator; Hanley, James P, delineator; Maleeva, Julia, delineator; Zsembery, Rachel J, delineator
Depicted place Pennsylvania; Allegheny County; Pittsburgh
Date 1999
date QS:P571,+1999-00-00T00:00:00Z/9
Dimensions 5 x 7 in.
Current location
Library of Congress Prints and Photographs Division Washington, D.C. 20540 USA http://hdl.loc.gov/loc.pnp/pp.print
Accession number
HAER PA,2-PITBU,78A-3
Credit line
This file comes from the Historic American Buildings Survey (HABS), Historic American Engineering Record (HAER) or Historic American Landscapes Survey (HALS). These are programs of the National Park Service established for the purpose of documenting historic places. Records consist of measured drawings, archival photographs, and written reports.

This tag does not indicate the copyright status of the attached work. A normal copyright tag is still required. See Commons:Licensing.

Notes
  • Significance: The bridge represents an adaptive engineering design response to political and technical concerns. County engineers successfully maneuvered around Federally-mandated clearances, aesthetic and financial considerations raised by local agencies, and the lack of adequate anchorage points along the river banks. The structures are the only trio of nearly identical bridges and among the few surviving examples of large eyebar suspension bridges in the U.S. They were the first self-anchored suspension bridges built in this county...
  • Unprocessed Field note material exists for this structure: N582
  • Survey number: HAER PA-490-A
  • Building/structure dates: 1926-1928 Initial Construction
References

This is an image of a place or building that is listed on the National Register of Historic Places in the United States of America. Its reference number is 86000017.
Source https://www.loc.gov/pictures/item/pa3659.photos.361484p
Permission
(Reusing this file)
Public domain This image or media file contains material based on a work of a National Park Service employee, created as part of that person's official duties. As a work of the U.S. federal government, such work is in the public domain in the United States. See the NPS website and NPS copyright policy for more information.

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current05:07, 1 August 2014Thumbnail for version as of 05:07, 1 August 20145,000 × 3,607 (17.2 MB)Fæ (talk | contribs)GWToolset: Creating mediafile for Fæ. HABS 31 July 2014 (3000:3200)

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