File:Detail, center span drive gears - Steel Bridge, Spanning Willamette River at State Route 99, Portland, Multnomah County, OR HAER ORE,26-PORT,14-6.tif

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Summary[edit]

Detail, center span drive gears - Steel Bridge, Spanning Willamette River at State Route 99, Portland, Multnomah County, OR
Photographer

Related names:

Waddell and Harrington; American Bridge Company; Robert Wakefield and Company; Union Bridge and Construction Company; Oregon-Washington Railroad and Navigation Company; Union Pacific and Southern Pacific; O'Connell, Kristen, transmitter; Oregon Department of Transportation, sponsor; Bennett, transmitter; McGaw, Judith A, historian; Norman, James, photographer; Schwab, Leslie, photographer
Title
Detail, center span drive gears - Steel Bridge, Spanning Willamette River at State Route 99, Portland, Multnomah County, OR
Depicted place Oregon; Multnomah County; Portland
Date Documentation compiled after 1968
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 ORE,26-PORT,14-6
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: An early example of the Waddell-type vertical lift bridge, the Steel Bridge documents that, guided by Harrington, most features of the type achieved "standard" form by 1912. It also demonstrates Waddell & Harrington's virtuosity in developing the bridge type's rich potential: its lower, railroad deck may be lifted independently, telescoping into the trusses above, or both decks may be lifted together, a unique combination. Combined with its great weight and massive members, these features made it an essential case in subsequent engineering discussions.
  • Unprocessed Field note material exists for this structure: FN-8
  • Unprocessed Field note material exists for this structure: N871
  • Survey number: HAER OR-21
  • Building/structure dates: 1910-1912 Initial Construction
Source https://www.loc.gov/pictures/item/or0291.photos.130789p
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.
Object location45° 31′ 25″ N, 122° 40′ 30″ W Kartographer map based on OpenStreetMap.View this and other nearby images on: OpenStreetMapinfo

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current06:33, 2 August 2014Thumbnail for version as of 06:33, 2 August 20145,000 × 3,576 (17.05 MB)Fæ (talk | contribs)GWToolset: Creating mediafile for Fæ. HABS 2014-08-01 2601-2900 missing

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