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<br />BONNY DAM <br />Missouri River Basin Project <br /> <br />General Information <br />Purpose: Irrigation.. flood control" silt storage. recreation. fish and wildlife <br />preservation, and stream pollution abat~ment <br />Location: On the South Fork of Republican River near Hale, Colo., about 6 miles <br />west of the Colorado-Kansas State line <br />Constructed: 1948-1951 <br />Water Supply: South Fork of Republican River <br />Drainage area: 1,495 square miles <br />Maximum flood: 103,000 cubic feet per second (1935) <br />Average yearly flow: 34,500 acre-feet <br />Reservoir: <br />Area: 2,042 acres <br />Controlled storage: 170, 160 acre-feet at elevation 3710 <br />Irrigation storagf~: 23,922 acre-feet <br />Dead storage: 1,418 acre-feet <br />Flood storage: 128.820 acre-feet <br />Sediment control storage: 16,000 acre-feet (100 years) <br /> <br />" <br /> <br />Dam <br />-Type: Homogeneous rolled-earth fill <br />Foundation: Ogallala formation <br />Slope protection: Riprap on gravel blanket on upstream face, seeded topsoil on <br />downstream face <br />Dimensions: <br />Height: 128 feet above streambed, 158 feet above excavation <br />Crest length: 9,200 feet <br />Crest elevation: 3742.0 <br />Volume: 9,000.000 cubic yards <br />Slopes: Upstream. B to 1 to elevation 3635, 3 to 1 to elevation 3710, then 2-1/2 <br />to 1 to elevation 3742 <br />Downstream, 10 (0 I to elevation 3632, 4 to I to elevation 3670, 2-1/2 <br />to I to elevation 3710. and 2 to 1 to elevation 3742 <br />Cutofr trench: 3D-foot bottom width with 1-1/2 to I side slope. Length 6,200 <br />feet, greatest depth of excavation 43 feet. <br /> <br />Spillway and Outlet <br />Type of Spillway: Concrete overflow chute type with stilling basin <br />Spillway crest: Elevation 3710,00 <br />Outlet crest: Elevation 3635,50 <br />Maximum discharge: Spillway, 73,300 cubic feet per second <br />Outlet, 200 cubic fe~t per second <br />Outlet conduit: 4 feet 8 inches in diameter, 118 feet long <br />Spillway gate: 10 feel 9 inches by 16 reet 6 inches <br />Stilling basin: Reinforced concrete with chute bLocks and dentated end sills <br />Concrete: 31,447 cubic yards <br />Reinforcing steel: 3,324,735 pounds <br /> <br />,J <br /> <br />v <br />