2025 10 27 Drainage Statement Rev 1

STORM SEWER COMPUTATIONS RATIONAL METHOD - (Q=CIA) 25 YR. STORM Date: 01-24-25, Revised: By: LCD AxC-Incremental AxC Cumulative Tc (MIN.) I-Rainfall Int. (in./hr) Qp-Peak Runoff (cfs) Pipe/Box Length (FT.) Slope (%) Pipe/Box Size (IN.) Capacity (FULL) (cfs) Velocity (Design) (fps) Pipe Travel Time(min) MH #1-2 MH #1-1 MH #1-1 EX. INLET C-Runoff Coef. TO Inlet #1-3 MH #1-2 Inlet #1-4 MH #1-1 A-Incremental FROM PIPE SEGMENT 0.11 0 0.051 0 0.99 0.99 0.99 0.99 0.10 0.00 0.05 0.00 0.10 0.10 0.16 0.16 6.0 6.0 6.0 6.0 5.60 5.60 5.60 5.60 0.59 0.59 0.87 0.87 50 34 55 25 1% 1% 1% 1% 12" HDPE 12" HDPE 12" HDPE 12" HDPE 3.87 3.87 3.87 3.87 4.93 4.93 4.93 4.93 0.17 0.11 0.19 0.08 GOOD GOOD GOOD GOOD