V4 11 Stormwater Report Rev 3 1 26 2023

Project #: 20-0265 ove PET RY @ ENGINEERING, LLCO Time of Concentration Calculations Pre-Development Project: Daughters of Israel Post-Development Oo County: Essex Drainage Area: DA-4 TOC Line 2 __ Sheet Flow Segment 1 Segment 2 Segment 3 wo Woods, Light Surface Description (Table 3-1) Un ee Manning's Roughness Coeff., n (Table 3- 0.4 - - Flow Length, L (total < 100 ft) 100 Two-Year 24-Hour Rainfall, P, 3.44 3.44 3.44 Land Slope, s (ft/ft) 0.15 T, 9.25 - - Shallow Concentrated Flow Segment 1 Segment 2 Segment 3 Surface Description Unpaved Flow Length, L 138 Watercourse Slope, s 0.18 Average Velocity 6.8 - - Ty, 0.34 - - Channel Flow — Segment 1 Segment 2 Segment 3 Cross Sectional Flow Area, a Wetted Perimeter, P,, Hydraulic Radius, r Channel Slope, s Manning's Roughness Description Manning's Roughness Velocity Flow Length T, 9.25 0.34 0.00 9.59