2024 03 Drainage Statement

Project: Proposed Residential Job #: 5142-24-00053 Location: West Orange, NJ Design Storm: 25-Year PIPE SECTION Computed By: DG Checked By: MB Date: 3/13/2024 Revised: NOTES: 1) Design method used is Rational Method 2) Refer to Weighted Runoff Coefficient table for calculation of incremental areas and C values SUBCATCH INCREMENTAL CUMULATIVE MENT AREA TIME OF CONCENTRATION FROM TO Area (Acres) "C" A x C Ac A x C (acres) Tc to Inlet (min) Inlet #1 Inlet #22 Inlet #21 Roof OCS #4 Basin A Inlet #21 Basin A Basin A MH #7 1.26 0.21 0.47 0.07 0.40 0.20 0.28 0.29 0.95 0.95 0.25 0.06 0.14 0.07 0.38 0.25 0.06 0.20 0.07 0.38 10.00 10.00 10.00 10.00 10.00 I PEAK RUNOFF Tc in Final Tc Q to Inlet Pipe (In/Hr) (min) (CFS) (min.) 0.14 0.68 0.04 0.23 0.24 10.00 10.00 10.68 10.00 10.00 6.80 6.80 6.68 6.80 6.80 1.70 0.41 0.94 0.48 2.58 PIPING INPUT Q cum. for Pipe (CFS) Dia. (In) 1.70 0.41 1.34 0.48 2.58 8 8 8 6 15 Length Man. (Ft) "n" 52.0 129.0 20.0 40.0 72.0 0.010 0.010 0.010 0.013 0.010 PIPING DATA Slope (ft/ft) 0.0200 0.0050 0.0400 0.0100 0.0055 Pipe Full Pipe Actual Pipe Capacity Velocity Velocity (fps) (cfs) (fps) 2.22 1.11 3.14 0.56 6.23 6.36 3.18 9.00 2.85 5.08 7.26 2.77 8.43 3.25 4.65