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APPENDIX 2.05.3-1OB (Continued) <br />• <br />Area E1 + E2 Sediment Trap Design Specifications (refer to Map 19) <br />Designed to contain <br />10-year/24-hour storm <br />Designed to pass peak flow <br />25-year/24-hour storm <br />Volume <br />.23 acre feet <br />4.5 cubic feet per second <br />The triangular shape trap is conceptually designed <br />Each side = 75 feet <br />Depth = .7 feet <br />Side slopes 3:1 <br />Volume approximately .25 acre feet <br />Outlet to be constructed at center of sediment trap embankment <br />Bottom width = 8' <br />Stage = .83' <br />Capacity = 15 cfs <br />Outlet Max Slope = 12.2% <br />Top Width of Embankment = 4' <br />Ditch Design <br />Area #2 Ditc <br />• Q10 <br />Length <br />Slope <br />Calculation <br />v Design <br />= Maz <br />Min <br />Slope <br />- Located below areas E2 and E1 <br />= 2.6 cfs <br />= 1900' <br />= 7485 <br />= 7360 <br />= 125'/1900' <br />= 6.5 ft. per 100' <br />Triangular <br />Slope 2:1 <br />T=4' <br />Y=1 <br />Q = 1.49 AR 2/3 <br />n <br />Q = Total Discharge <br />n = Mannings number .035 <br />A = Area <br />R = Hydraulic Radius <br />S = Slope <br />Construct ditch below area E2 using same dimensions as E1. <br />t_ J <br />- 304 - (Rev. 5/86) <br />