2015-12-23_PERMIT FILE - C1996083A (5)

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Spillway Pond J Determine flow velocity down 3h:1v embankment AREA=(W"D)+(X`DA2)= WETTED PERIMETER=(W)+2`[((X*D)A2+DA2)A0 51 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 Dewatering OPERATIONS CONFIGURATION 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 J Pond J Emergency SpillwaN 2.29 Acre -Feet VOLUME Manning's Equation PUMP CAPACITY 259 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 2000 AREA=(W"D)+(X`DA2)= WETTED PERIMETER=(W)+2`[((X*D)A2+DA2)A0 51 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 Dewatering OPERATIONS CONFIGURATION 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 TR -105 Volume Xi, App. B-6 300 FEET A2 7.24 FEET 0.41 11.90 FT/SEC 35.69 CFS 31.81 CFS 09/15 POND J RUNOFF FROM 10 -YEAR, 24-HOUR EVENT 2.29 Acre -Feet VOLUME 744575 Gallons PUMP CAPACITY 259 GPM PUMP SIZE 4" Dewatering Time 288000 Minutes 4800 Hours 200 Days TR -105 Volume Xi, App. B-6 300 FEET A2 7.24 FEET 0.41 11.90 FT/SEC 35.69 CFS 31.81 CFS 09/15