2022 08 Drainage Report

q DYNAMIC ENGINEERING Overflow Spillway Calculations Project: Residential Subdivision Job #: 4266-99-001 Location: West Orange Township Computed By: RMW Checked By: RPF Date: 8/5/2022 BIORETENTION BASIN A To Size Spillway: . Assume complete blockage of the outlet control structure and no infiltration . Route 2 ,10 & 100 year storm through basin assuming that the basin is filled with water up to the Emergency Spillway Elevation 2 Year 40 Year 100 Year |Spillway Width (ft. illway Elevation (ft. Flow through Spil |Water Surface Elevation (ft) Depth of Flow (ft) 0.09) [Area of Flow (A) (sf)* 0.94 Velocity (V) = Q/ A (ft/sec) 0.83 4.03 1.29 &V = < 2.0FPS & Stability Achieved