2017-06-05_PERMIT FILE - C1996083A (2)

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FULL BUILD OUT CONFIGURATION Spillway Pond J Determine flow velocity down 3h:1v embankment AREA=(W*D)+(X*DA2)= WETTED PERIMETER=(W)+2*[((X*D)A2+DA2)A0.5] R=AREA/WETTED PERIMETER V=(1 49/N)*(RA 667)*(SA.5)= Q=AXV= Q REQUIRED - Peak Discharge Sediment Pond J Riprap Sizing - Down Face of Embankment - Pond , D50 = Size of Riprap D50 = ((V X SA 17)/7 58))A2 D50 = Diameter in feet V = Velocity S =Slope D50 = 1 7 feet Pond Dewatennc FEET FEET EXPRESS AS DECIMAL EXPRESS AS DECIMAL SLOPE = X 1 20 inches POND J DEWATERING USE A PUMP WITH A CAPACITY TO DEWATER IN 48 -HOURS POND Pond J Emergency Spillway 249 Acre -Feet VOLUME Manning's Equation PUMP CAPACITY 281 GPM Flow In a Trapezoidal Channe DEPTH D 0 500 WIDTH W 5 000 Slope S 0 330 Mannings "N" N 0.040 SIDE SLOPE X 2.000 AREA=(W*D)+(X*DA2)= WETTED PERIMETER=(W)+2*[((X*D)A2+DA2)A0.5] R=AREA/WETTED PERIMETER V=(1 49/N)*(RA 667)*(SA.5)= Q=AXV= Q REQUIRED - Peak Discharge Sediment Pond J Riprap Sizing - Down Face of Embankment - Pond , D50 = Size of Riprap D50 = ((V X SA 17)/7 58))A2 D50 = Diameter in feet V = Velocity S =Slope D50 = 1 7 feet Pond Dewatennc FEET FEET EXPRESS AS DECIMAL EXPRESS AS DECIMAL SLOPE = X 1 20 inches POND J DEWATERING USE A PUMP WITH A CAPACITY TO DEWATER IN 48 -HOURS 3.00 FEET A2 7.24 FEET 0.41 1190 FT/SEC 3569 CFS 33.49 CFS TR -105 Volume XI, App. B-6 09/15 POND RUNOFF FROM 10 -YEAR, 24-HOUR EVENT 249 Acre -Feet VOLUME 809890 Gallons PUMP CAPACITY 281 GPM PUMP SIZE 4" Dewatering Time 2880.00 Minutes 4800 Hours 200 Days 3.00 FEET A2 7.24 FEET 0.41 1190 FT/SEC 3569 CFS 33.49 CFS TR -105 Volume XI, App. B-6 09/15