Stormwater Report 1

STORM SEWER COMPUTATIONS RATIONAL METHOD - (Q=CIA) 25 YR. STORM C-Runoff Coef. AxC-Incremental Tc (MIN.) I-Rainfall Int. (in./hr) Qp-Peak Runoff (cfs) Qp-Peak Runoff (cfs) (Cumulative) Pipe/Box Length (FT.) Slope (%) Pipe/Box Size (IN.) Capacity (FULL) (cfs) Velocity (Design) (fps) Pipe Travel Time(min) Type "B" #5-1 Type "B" #4-1 0.08 0.05 0.99 0.99 0.08 0.05 6.0 6.0 5.80 5.80 0.46 0.29 0.46 0.75 165 165 1.0% 1.0% 15" HDPE 15" HDPE 8.42 8.42 6.86 6.86 0.40 0.40 Type "B" #4-3 Type "B" #4-2 Type "B" #4-1 Type "B" #4-2 Type "B" #4-1 MH #1-3 0.22 0.34 0.15 0.99 0.99 0.99 0.22 0.34 0.15 6.0 6.0 6.0 5.80 5.80 5.80 1.26 1.95 0.86 1.26 3.22 4.82 165 165 165 1.0% 1.0% 1.0% 15" HDPE 15" HDPE 15" HDPE 8.42 8.42 8.42 6.86 6.86 6.86 0.40 0.40 0.40 Type "B" #3-2 Type "B" #3-1 Type "B" #3-1 Type "B" #2-2 0.03 0.03 0.99 0.99 0.03 0.03 6.0 6.0 5.80 5.80 0.17 0.17 0.17 0.34 165 165 1.0% 1.0% 15" HDPE 15" HDPE 8.42 8.42 6.86 6.86 0.40 0.40 Courtyard Type "B" #2-3 Type "B" #2-2 Type "B" #2-1 Type "B" #2-3 Type "B" #2-2 Type "B" #2-1 Type "B" #1-4 0.42 0.02 0.02 0.18 0.99 0.99 0.99 0.99 0.42 0.02 0.02 0.18 6.0 6.0 6.0 6.0 5.80 5.80 5.80 5.80 2.41 0.11 0.11 1.03 2.41 2.53 2.99 4.02 165 165 165 165 1.0% 1.0% 1.0% 1.0% 15" HDPE 15" HDPE 15" HDPE 15" HDPE 8.42 8.42 8.42 8.42 6.86 6.86 6.86 6.86 0.40 0.40 0.40 0.40 Type "B" #1-6 Walkways Type "B" #1-5 Type "B" #1-4 MH #1-3 Type "B" #1-2 Type "B" #1-5 Type "B" #1-5 Type "B" #1-4 MH #1-3 Type "B" #1-2 Type "B" #1-1 Ex. Type Double "B" Inlet 0.32 0.02 0.13 0.34 0.99 0.99 0.99 0.99 0.32 0.02 0.13 0.34 0.13 0.99 0.13 6.0 6.0 6.0 6.0 6.0 6.0 5.80 5.80 5.80 5.80 5.80 5.80 1.84 0.11 0.75 1.95 0.00 0.75 1.84 1.95 2.70 8.67 13.49 14.24 165 165 165 165 165 165 1.0% 1.0% 1.0% 1.5% 3.5% 3.5% 15" HDPE 8.42 6.86 15" HDPE 8.42 6.86 15" HDPE 8.42 6.86 15" HDPE 10.31 8.40 15" HDPE 15.75 12.84 15" HDPE 15.75 12.84 0.40 0.40 0.40 0.33 0.21 0.21 0.20 0.99 0.20 6.0 5.80 1.15 15.39 165 3.5% 15" HDPE 15.75 12.84 0.21 Type "B" #1-1 TO Type "B" #5-2 Type "B" #5-1 FROM A-Incremental PIPE SEGMENT