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Run-off Collection Ditch Designs <br />All ditches are designed for the maximum drainage area for the same storm event described for the <br />sediment detention basins. All ditches will have 0.3 feet of freeboard. Since the ditches will be created <br />primarily at the edge of roads in very rocky areas, no ditch lining is needed. The ditches will be <br />monitored for any maintenance needed. <br />Collection Ditch for Basin 1 <br />Channel Type: Triangular, Equal Side Slopes <br />Dimensions: Left Side Slope 1.00:1 <br />Right Side Slope 1.00:1 <br />Wetted Perimeter: 1.42 <br />Area of Wetted Cross Section: 0.25 <br />Channel Slope: 25.0000 <br />Manning's n of Channel: 0.0400 <br />Discharge: 1.49 cfs <br />Depth of Flow: 0.50 feet <br />Velocity: 5.88 fps <br />Channel Lining: Rock <br />Freeboard: 0.30 feet <br />Collection Ditch for Basin 2 <br />Channel Type: Triangular, Equal Side Slopes <br />Dimensions: Left Side Slope 1.00:1 <br />Right Side Slope 1.00:1 <br />Wetted Perimeter: 1.95 <br />Area of Wetted Cross Section: 0.48 <br />Channel Slope: 5.2000 <br />Manning's n of Channel: 0.0400 <br />Discharge: 1.58 cfs <br />Depth of Flow: 0.69 feet <br />Velocity: 3.31 fps <br />Channel Lining: Rock <br />Freeboard: 0.30 feet <br />Yule Quarry April 10 23