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SWB -7 10YR Runoff.txt <br />Runoff curve Number and Runoff Mon Sep 16 11:43:00 2013 <br />Project: SWB -7 <br />By: B Langenfeld Date: <br />09/16/13 <br />Location: Revenue Mine <br />checked: <br />Date: <br />Developed <br />1. Runoff Curve Number (CN) <br />Cover description <br />CN Soil Group <br />Area(Acre) <br />Mined Land, Disturbed (Poor) <br />87 c <br />3.343 <br />open Space -Poor ( <50% grass) <br />68 A <br />4.265 <br />Herbaceous mixture (Fair) <br />71 B <br />1.592 <br />CN (weighted): 75.4 <br />Total Area: 9.200 Acre <br />2. Runoff <br />Return Period: <br />10 -Year <br />Rainfall, P: <br />2.20 <br />in <br />Runoff, Q: <br />0.4987 <br />in <br />Runoff volume: <br />0.3823 <br />Acre -Ft <br />Page 1 <br />