photographer unknown 13 March 1936 AERIAL VIEW OF THE SPILLWAY DAM JUST BEFORE FLOODING THE FIRST STEP COFFERDAM. TWO CRIBS IN PLACE ON WASHINGTON SHORE FOR EACH LEG OF THE SECOND STEP COFFERDAM. CRIBWAYS NEAR UPSTREAM LEG. - Bonneville Project, Bonneville Dam, Columbia River, Bonneville, Multnomah County, OR

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