Hubert Blonk Papers. SPC-006-0628-5-9-6
Black and white photograph
Scanned at 600 ppi TIFF format, resized to 72 ppi JPEG format.
cofferdam construction at Grand Coulee Dam.
Archives & Special Collections, Eastern Washington University Libraries.
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Grand Coulee Dam (Wash.); Hydroelectric power plants -- Washington (State); Dams -- United States -- Design and construction; Cofferdams -- Design and construction