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Calcu'~tions: <br />• <br />for D = 7.9' <br />a = 725.62 <br />p = ]08.48 <br />r = 6.69 <br />1.;86 (725.62) (6.69)23 (.005)1 <br />Q .035 <br />Q = 7,739 cfs <br />design flow 7,640 cfs <br />use 7.9' for depth in rechannelized area <br />Flood Control Plan: <br />• Utilize Colorado State Highway Department Cross Sections <br />• • Locate and size dike to contain 100 year 24 hour peak flow event <br />• Use 2.0' freeboard on dike <br />• Use available riprap iaterial to line channel side of dike <br />• Dike top width 10.0' <br />• Dike side slopes 2H: 1V <br />• Dike construction methods <br />- haterial consists of minus 6 inch clay, siltstone, shale <br />- Material placement in thin, continuous, horizontal lifts <br />- ~4aterial compacted to 90Y of modified proctor dry density <br />• Dike construction completed during fall of 1984 <br />• <br />• Seeding and planting of dike immediately following construction <br />