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This is a view looking west across the dam, showing the span of the great cantilever cranes. The last of the CBI cantilever cranes were dismantled on Sept. 12, 1940. Note the transverse beams inside the trestle towers on which monorail cranes operated while placing concrete beneath the trestle. Heavy construction equipment comes high. Upon receiving their notice to proceed, MWAK Co. immediately let contracts for $5 million of equipment and material, and by Jan. 1, 1937 this item totaled...
These cantilever cranes (hammerhead) were specially designed by Colby Steel and Engineering Co. and Bethlehem Steel to 300 and 330 ft. double cantilevers. With a total of 8 motors totaling 408 horsepower they could both carry empty buckets at 600 feet per minute and lower loaded ones at 300."(Clifford R. Koester. A History of the Columbia Basin Project II, 150)
Part of Western Waters Digital Library: http://harvester.lib.utah.edu/wwdl/; Photographer Unknown
Clifford R. Koester
Gantry cranes--Washington (State)--Grand Coulee Dam; Cantilever cranes--Washington (State)--Grand Coulee Dam; Cranes, derricks, etc.--Washington (State)--Grand Coulee Dam
Cranes; Construction equipment
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. 2, Page 152-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