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Ditch 9B <br />Wetted Perimeter: 0.64 <br />Area of Wetted Cross Section: 0.05 <br />Channel Slope: 23 <br />Manning's n of Channel: 0.0400 <br />Discharge: 0.1718 cfs <br />Depth of Flow: 0.2275 feet <br />Velocity: 3.3198 fps <br />Channel Lining: Rock <br />Freeboard: 0.30 feet <br />The cross section below illustrates a typical ditch with the freeboard required. <br />I <br />1 <br />0 30 Freeboard. <br />l r- iangula,'iian�;e <br />Equal Side Slopes <br />Channel Lining Rock <br />f <br />If rock lining is needed, it will be 3' size to 6" size maximum over a thickness of 8 inches. This is true <br />for Ditch 1 leading to Sump 1. <br />Additional Sediment Control Measures <br />There is an area of fines on a steep slope on the very north edge of the permit area. This area has had <br />some sediment delivery to the stream below in the past. The slope is approximately 1.4H:1 V and does <br />not contain vegetation. Map C -2 shows that this area will receive special attention through the <br />application of an organic compost material or topsoil to aid vegetation growth, which is to be applied to <br />the area and mixed with the existing granular material at a rate of 50 lbs per square yard. Then the <br />Yule Quarry January 2014 38 <br />