Public domain
Grand Coulee Dam, Columbia Basin Reclamation Project. The east face of block 31 with a portion of the deep crevice shown in the foreground showing the high trestle, elev. 1028, high pour in center of picture at elev. 915; bottom of crevice at elev. 795; and deck of low trestle at elev. 950
From the collection of Library of Congress. Free to download, adapt and use — no permission needed.
Credit lineGrand Coulee Dam, Columbia Basin Reclamation Project. The east face of block 31 with a portion of the deep crevice shown in the foreground showing the high trestle, elev. 1028, high pour in center of . 1936-01-01. Farm Security Administration/Office of War Information Collection, Library of Congress. Public domain.
