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<br />TABLE 4.2-13 CULVERT AND DITCH SIZING CALCllLATIONS <br />The ditches along the haul road ,behind the sediment pond and from the <br />emergency spillway must be designed to handle the flows experienced. <br />All Ditches are trapezoidal with a minimum depth of 1.5 feet. <br />Cross Sections of the ditches are shown on Figure 2.2-3. <br />f,..J <br />Ditch Ditch <br />Slope Base <br />Width <br />B Manning <br />Number Side <br />Slope <br />Z Flow <br />Depth <br />d Capacity <br />(CFS) Required <br />Capacity Freeboard <br />Upper Road 0.1 1 0.035 1 0.355 4.319 4.32 1.145 <br />Middle Roa 0.056 1 0.035 1 0.57 5.337 5.29 0.93 <br />Lower Roa 0.05 1 0.035 2 0.76 6.689 6.67 0.74 <br />Collector 0.065 2 0.035 1.5 0.26 4.779 4.6 1.24 <br />Outflow 0.03 3 0.035 1.5 0.36 6.856 6.67 1.14 <br />Emergency 0.03 4 0.035 1 0.39 10.111 10.05 1.11 <br />Freeboard <br />Side Slope =Z = e/d <br />d Flow Depth <br />e <br />f Base - B --- <br /> <br />Mc Voll <br />Page 2 <br />Chanel Depth <br />10-13-97 <br />