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File:Detail view of double-leaf bascule drawspan in closed position. - Morrison Bridge, Spanning Willamette River on Morrison and Alder Streets, Portland, Multnomah County, OR HAER OR-100-15.tif

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Detail view of double-leaf bascule drawspan in closed position. - Morrison Bridge, Spanning Willamette River on Morrison and Alder Streets, Portland, Multnomah County, OR
Photographer

Related names:

Sverdrup and Parcel
Moffatt, Nichol and Taylor
American Bridge Division
U.S. Steel
Manson Construction and Engineering
Sears, Hannah T, transmitter
O'Connell, Kristen, transmitter
McGaw, Judith A, historian
Norman, James, photographer
Schwab, Leslie, photographer
Title
Detail view of double-leaf bascule drawspan in closed position. - Morrison Bridge, Spanning Willamette River on Morrison and Alder Streets, Portland, Multnomah County, OR
Depicted place Oregon; Multnomah County; Portland
Date Documentation compiled after 1968
Dimensions 4 x 5 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 OR-100-15
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 Morrison Bridge embodies the mid-twentieth century transition in bridge engineering. The last bascule bridge built on the Willamette in Portland, it replaced the last of the earlier swing spans to carry vehicular traffic. The Morrison had been on the drawing board since 1927; thirty years later it essentially embodied the 1920s consensus. But it was also the first local Willamette span to emerge from corporate design rather than from a small consulting firm led by a nationally prominent individual engineer. Innovative open bascule piers permit the river to flow through, minimizing the hydraulic effects of their exceptional size. It is the only non-freeway bridge integrated with Portland's freeway system.
  • Survey number: HAER OR-100
  • Building/structure dates: 1954-1958 Initial Construction
Source https://www.loc.gov/pictures/item/or0469.photos.200037p
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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current09:39, 2 August 2014Thumbnail for version as of 09:39, 2 August 20145,077 × 4,104 (19.87 MB)Fæ (talk | contribs)GWToolset: Creating mediafile for Fæ. HABS 2014-08-01 2601-2900 missing

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