Dams and Control Works

American Falls Dam arch Arrowrock Arrowrock Dam back fill balanced needle valves bars Boise project borrow pits built Bureau of Reclamation buttresses canyon cement cent channel clay cobbles cofferdams completed conduit construction contracting officer contraction joints contractor core wall cost Creek crest crete cubic yards cut-off trench depth discharge downstream face drainage drains drawings drilled earth elevation embankment emergency gate engineer excavation fault zone foundation furnished Government gravel grout holes hauling hoist Illus included installed irrigation located material maximum ment metal miles North Platte project operation Owyhee Dam paint paragraph Pathfinder Dam penstock pipe pits placed plant portion pressure grouting railroad reservoir riprap river roller sand schedule second-feet shaft shown side slope sluice sluiceway solid rock specifications spillway storage stream bed structure suitable surface thickness timbering tion tracting officer Trash Rack unit prices bid upstream face vertical Weber River