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Chapter 4 An 'Best Management Practices for Erosion and Sediment Control <br /> GRCST OF EMERGENCY <br /> SPILLWAY <br /> DESIGK HIGH WATER <br /> a <br /> (25 —YiL STORM ELEV.) <br /> Mlh, 1 . 4' <br /> fl 5' <br /> - --- -- -- - --- -- - <br /> MIN. 1 .8' <br /> WIN RISER CREST <br /> 07 G.Y./ AC . . ' . . . . . . . DEWATERING <br /> DRY ' STORAGE . . I OEV CE <br /> r <br /> 67 C.Y./ AC. <br /> IF Ion <br /> --Ann, — :::n- <br /> An <br /> iii: e :�i <br /> rrr ' <br /> SE01MEN7 CUANOUT POINT <br /> ( " WZ " STORAGE REDUCE) <br /> TO 34 G.Y. J ACRE} <br /> Design Elevations with Emergency Spillway► <br /> Nr. <br /> .. DESIGtA HIGH WATER J <br /> (25 —YR. STORM ELEY.) hilMZ. 0 <br /> -- - - _ - -- VIN . 13.0 ' <br /> 3d1h1. 1 . 0 ' T - - <br /> DRY " 5170RAGE . . . .. .. . .': . . . . . <br /> RJ$ER CREEF <br /> 67 C .Y./ AC. ... pEWATERING <br /> " WcT " STORAGE ` ":;»" DEVICE <br /> INAMMUMM <br /> 'w <br /> MIN SEDIMENT CLEANOUT POINT <br /> Design Elevations without , Emergency Spillway <br /> (Riser Passes 26wYear Event) <br /> r <br /> irr <br /> Plate 4 .26b Sediment Basin Schematic Elevations <br /> Source : Virginia DSWC <br /> 4-83 <br />