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Asb-2 <br /> <br />SEDIMENTATION RESERVOIR <br />NAME: CENTRAL FACILITIES - TOPSOIL STOCKPILE <br />I. RUNOFF AND VOLUMES <br />Determine: <br />Maximum runoff area and peak discharges <br />Reservoir liquid volume <br />Reservoir sediment volume <br />Total reservoir volume <br />Area: Total Area = 4.04 Ac <br />Area 2:1 sideslones = 1.80 Ac <br />Area Ton or Stockpile = 1.47 Ac <br />Area Access Road = 0.77 Ac <br />Precipitation: <br />P10 = 1 7 inch(es) (10-year, 24-hour precipitation event <br />~m the Precipitation-Frequency Atlas of the West- <br />ern United States, Volume III - Colorado) <br />P25 = 2 1 inch(es) (25-year, 24-hour precipitation event <br />~m the Precipitation-Frequency Atlas of the West- <br />ern United States, Volume III - Colorado) <br /> <br />Curve Number: From Figure S-3 in Peak Flows in Colorado with soil <br />type C and assuming Cover = 507 CN = 80 <br />Runoff: From Table S-3 <br />For P10 = 1.7 <br />(Page 60) <br />Q10 = 0.39 <br />P25 = 2.1 <br />Q25 = 0.62 <br />;AN c 2 1985 <br />