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Blue Pit <br />Type II Storm Rainfall <br />Runoff <br />Watercourse Slope <br />Time of Concentration <br />Peak Discharge <br />Side Slopes <br />Bottom of Channel <br />Manning Coefficient <br />Depth of Flow <br />Free Board <br />112 Permit Amendment <br />2.4 in <br />1.21 acre -ft <br />33% <br />15.3 min <br />15.1 cfs <br />3H:1V, 8H:1V <br />2 feet width <br />0.025 <br />0.38 feet <br />1.12 feet <br />Energy of this flow will be dissipated by large rock boulders of D50 = 5 feet will be placed over an <br />area of 15 feet x 15 feet at the toe of each grouted channel. <br />Blue Pit May 2014 G -4 <br />