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The parabolic arches of the dam bridge have a clear span of 135 feet and a rise of 17.25 feet. Each arch barrel varies in thickness from 3 feet at the abutments to 18 inches at the crown, and is 30 feet 2 inches wide." When these arches were poured they were divided into seven sections numbered 4, 2, 3, 1, 3, 2, 4 from one end to the other, and the sections poured in numerical sequence. This was to facilitate curing, and also to assure that each section of the span assumed its permanent...
Part of Western Waters Digital Library: http://harvester.lib.utah.edu/wwdl/; Photographer Unknown
Clifford R. Koester
Bridges--Columbia River; Bridges--Foundations and piers--Design and construction; Highway Bridge--Columbia River; Timber cribs--Railroad bridges--Columbia River; Timber cribs--Highway bridges--Columbia River
Railroad bridge; Vehicle bridge; Pedestrian Bridges
United States--Washington (State)--Grant County--Grand Coulee Dam site, Grand Coulee Dam (Wash.)
Manuscripts, Archives, and Special Collections, Washington State University Libraries: http://www.wsulibs.wsu.edu/holland/masc/masc.htm
A History of the Columbia Basin Project (Vol. 3, Page 328-B )-Cage 709: Clifford R. Koester Papers, 1927-1972: http://www.wsulibs.wsu.edu/holland/masc/finders/cg709.htm
To order a reproduction please see: http://www.wsulibs.wsu.edu/holland/masc/policies.htm , or contact Washington State University Libraries, Manuscripts, Archives, and Special Collections: (509) 335-6691.
For permission to publish please contact Washington State University Libraries, Manuscripts, Archives, and Special Collections: (509) 335-6691.
Original photographic prints were scanned at 24 bit 3000 pixels by the long side for master TIFF files on an Plustek OpticBook 3600 Plus. Also, 24 bit 150 PPI JPEGs were created with the OpticBook 3600 Plus and added to the CONTENTdm database at the WSU Libraries