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<br />SEDIMENT CONTROL DESIGN <br />CARBON JUNCTION MINE <br />OARRIDGE ENERGY, INC. <br />~J <br />LOCATION: Along east side of permanent channel realignment. <br />BTORM TYPE: 30 yr. 24 hr. event. <br />NAME OF BTRUCTURE: East Collection Channel <br />TYPE OF BTRUCTURE: Collection channel for disturbed runoff after <br />mining. <br />BABIC DATA <br />1. PRECIPITATION EVENT: <br />2. WEIGHTED SOILS COMPLEX NO: <br />3. LENGTH: <br />4. AREA: <br />5. SLOPE: <br />6. HYDRAULIC LENGTH: <br />7. RUNOFF: <br />8. TIME CONCENTRATION, HOUR <br />9. PEAK DISCHARGE PER UNIT: <br />10. TOTAL PEAK DISCHARGE: <br />STRUCTURE DESIGN <br />2.25 in. <br />90 <br />3000 ft. <br />0.037 sgmi. <br />7.6$ <br />3000 ft. <br />1.31 <br />.18 <br />820 cfs/in/sgmi. <br />39.75 cfs. <br />1. LENGTH: 3000 ft. <br />2. WIDTH: 10 ft. <br />3. HEIGHT: 1.0 ft. <br />4. FLOW DEPTH AT PEAK DISCHARGE: 0.44 ft. <br />5. SAFETY FACTOR, BOTTOM: 1.94 <br />6. SAFETY FACTOR, SIDES: Ok <br />7. WALL SLOPE: 1V:3H <br />8. VELOCITY: 9.03 fps. <br />9. D/50: 1.0 ft. <br />DESIGN: Ditch 10 ft. wide, 1 ft. deep with 1V;3H slopes. <br /> <br />