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DITCH C15 <br />Channel Type: Trapezoidal, Equal Side Scopes <br />Dimensions: Left Side Slope 2.00:1 <br />Right Side Slope 2.00:1 <br />Base Dimension: 2.00 <br />Wetted Perimeter: 2.82 <br />Area of Wetted Cross Section: 0.44 <br />Discharge: 1.70 cfs <br />Depth of Flow: 0.18 feet <br />Velocity: 3.90 fps <br />Channel Lining: GRASS <br />• Freeboard: 0.30 feet <br />DITCH C16 <br />This ditch is an overflow ditch for the inlet to the permanent West Lateral Ditch pipeline. It is meant to <br />handle 20.0 cfs which is the maximum flow of the West Lateral Ditch. It only runs if there is a clog or <br />an emergency in the pipeline or a system flush creates more flow than the pipeline can handle. The <br />ditch is steep since it runs north to Tuttle Draw near 2700 Road. The ditch has an 8.0 feet bottom width, <br />1.5:1 sideslopes and a 5 feet depth. The bottom of the ditch is on bedrock so even though the slope of <br />the channel is greater than 20% (24%), no erosion occurs. <br />DITCH C17 <br />Time of Concentration (SCS Method) <br />Curve Number: 78 <br />Length of Flow (ft): 2636.71 <br />• <br />REVISED MARCH 2006 <br />Attachment 2.05.3(3)-1-33 <br />