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C~ <br />SEDIMENT CONTROL DESIGN <br />CARBON JUNCTION NINE <br />OARRIDGE ENERGY, INC. <br />• <br />NAME OF BTRUCTURE: West Collection Channel (East Fill Downdrain) <br />TYPE OF BTRUCTURE: Collection Ditch for disturbe8 runoff after <br />mining. <br />LOCATION: East of Fill and northwest pit. <br />STORM TYPE: 30 yr. 24 hr. event. <br />BASIC DATA <br />1. PRECIPITATION EVENT: <br />2. WEIGHTED SOILS COMPLEX N0: <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 />2900 ft. <br />0.04 sgmi. <br />7.6~ <br />2900 ft. <br />1.31 in. <br />0.15 <br />835 cfs/in/sgmi. <br />43.75 <br />1. LENGTH: 2900 ft. <br />2. WIDTH: 10 ft. <br />3. HEIGHT: 2.0 ft. <br />4. FLOW DEPTH AT PEAK DISCHARGE: 0.63 ft. <br />5. SAFETY FACTOR, BOTTOM: 2.56 <br />6. SAFETY FACTOR, SIDES: 1.92 <br />7. WALL SLOPE: 1V:3H <br />8. VELOCITY: 6.94 fps. <br />9. D/50: 2.0 ft. <br />DESIGN: Ditch l0 ft. wide, 2 ft. deep with 1V;3H slopes. <br /> <br />