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A frontal view of the construction of Hoover Dam. The open "slot" down the front of the dam is being filled in with concrete. The slot had been used to carry pipes of ice water to cool the concrete as it hardened.
1 photograph :b&w Photographic prints
00017340 SecurityÂ Pacific National Bank Collection Industries-Water and Power-Reservoirs-Hoover Dam.; S-002-165 4x5 CARL0000002696 http://220.127.116.11/cdm/ref/collection/photos/id/89948
Water-supply--California, Southern Dams--Design and construction Concrete--Cooling Hoover Dam (Ariz. and Nev.)