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BOULDER DAM Boulder Canyon Project ArizonaCaliforniaNevada
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50 feet acre-feet aggregate All-American Canal arch arch dam Arrowrock Dam basin borrow pit Boulder Dam BUREAU OF RECLAMATION buttress cableway canal cantilever cement centers channel cofferdam construction contraction joints cooling cost crest cubic yards cut-off trench deflections depth designed diameter discharge diversion tunnel downstream face drainage drilled dumped earth elevation embankment emergency gates Engineering excavation feet long feet wide flow foundation gallery gate chamber Grand Coulee Grand Coulee Dam gravel gravity grout hoist horizontal hydraulic Imperial Dam Installing and painting intake irrigation left abutment located lower material maximum miles mixer mixing plant needle valves operating outlet Owyhee Owyhee Dam penstock pipe placed pounds per square pressure pump radial reservoir reservoir water riprap river rock fill roller sand second-feet shaft side slope sluiceway spillway square inch steel storage stresses temperature tests thickness tion tower trashrack trial load upstream face vertical water surface