V4 11 Stormwater Report Rev 3 1 26 2023

Time of Concentration Calculations Project #: 20-0265 Pre-Development Project: Daughters of Israel Post-Development County: Essex Drainage Area: DA-2 Sheet Flow Segment 1 Segment 2 Segment 3 Woods, Light Surface Description (Table 3-1) Underbrush Manning's Roughness Coeff., n (Table 3-1) 0.4 - - Flow Length, L (total ≤ 100 ft) 100 Two-Year 24-Hour Rainfall, P2 3.44 3.44 3.44 Land Slope, s (ft/ft) 0.13 Tt 9.80 - - 9.80 Shallow Concentrated Flow Segment 1 Segment 2 Segment 3 Surface Description Unpaved Unpaved Flow Length, L 66 63 Watercourse Slope, s 0.11 0.22 Average Velocity 5.3 7.5 - Tt 0.21 0.14 - 0.35 Channel Flow Segment 1 Segment 2 Segment 3 Cross Sectional Flow Area, a Wetted Perimeter, Pw Hydraulic Radius, r - - - Channel Slope, s Manning's Roughness Description Manning's Roughness - - - Velocity - - - Flow Length Tt - - - 0.00 10.14