Laserfiche WebLink
2_1 West Sump <br /> Runoff Curve Number and Runoff <br /> Project: Eagle Rock <br /> Project: West Sump By: B Langenfeld Date: 06/28/18 <br /> Location: Tower Pit <br /> Developed <br /> 1. Runoff Curve Number(CN) <br /> Cover description CN Soil Group Area(Acre) <br /> Paved Lots Roofs&Driveways 98 D 7.521 <br /> Open Space-Fair(50%to 75%grass) 49 A 16.079 <br /> Mined Land, Disturbed(Poor) 87 C 26.489 <br /> CN(weighted): 76.5 <br /> Total Area: 50.089 Acre <br /> 2. Runoff <br /> Return Period: 100 YEAR <br /> Rainfall, P: 2.51 in <br /> Runoff,Q: 0.7212 in <br /> Runoff Volume: 3.0105 Acre-Ft <br /> The area of the pit that drains to the west sump is 22.6 acres. With a two foot stormwater berm, <br /> there is 45.2 acre-ft of storage. This more than sufficient to contain the entire 3 acre-ft of runoff <br /> that drains to this area. <br /> Tower Pit (.rrg lea c4i anJ lsuxialc YI i <br /> October 2018 G-3 <br />