Hubert Blonk Papers. SPC-006-0628-5-15-6
January 31, 1982
Black and white photograph
Scanned at 600 ppi TIFF format, resized to 72 ppi JPEG format.
Hard hat worn by construction workers on Grand Coulee Dam. Early version of hard hat was plastic resin impregnated fabric. This one was worn by project engineer Frank Banks.
Archives & Special Collections, Eastern Washington University Libraries.
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Dams -- United States -- Design and construction; Construction workers -- United States.