American Dam - View north from middle of river. Closing gap in downstream dyke; P&H excavator visible on the left and Northwest excavator on the right. Photo taken on February 9, 1937 at 4:20pm.
The beginning of the downstream dyke of the western cofferdam. A cofferdam is a temporary enclosure built within, or in pairs across, a body of water and constructed to allow the enclosed area to be pumped out, creating a dry work environment for the major work to proceed.
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