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• <br />• <br /> <br />watershed Data <br />Elk Creek Light Use Road - 48" CMP <br />Curve Number = 63 <br />Area = 12.2 acres <br />Hydraulic Length = 1200 feet <br />Elevation Change = 700 feet <br />Concentration Time = 0.02 hours <br />Concentration Time Type = SCS Upland Curves <br />Unit Hydrograph Type = Disturbed <br />Storm Data <br />Total Precipitation = 2.4 inches <br />Storm Type = SCS Type 2, 25 Yr 24 Hr Storm <br />Peak Discharge = 1.64 cfs <br />Discharge Volume = 0.22 acre-feet <br />48" CMP Capacity = 63 cfs <br />Watershed Data <br />Elk Creek Light Use Road - 18" CMP <br />Curve Number = 63 <br />Area = 20.9 acres <br />Hydraulic Length = 1650 feet <br />Elevation Change = 910 feet <br />Concentration Time = 0.04 hours <br />Concentration Time Type = SCS Upland Curves <br />Unit Hydrograph Type = Disturbed <br />Storm Data <br />Total Precipitation = 2.4 inches <br />Storm Type = SCS Type 2 , 25 Yr 24 Hr Storm <br />Peak Discharge = 3.05 cfs <br />Discharge Volume = 0.37 acre-feet <br />48" CMP Capacity = 5.5 cfs <br />The calculations presented a bove show that the four culverts <br />associated with the Elk Creek Light Use Road can pass the runoff <br />from a 25 year 24 hour storm. <br />The calculations and pier <br />was prepared by o~Pg <br />information pres~e~: <br />knowledge and be~+y~,~: <br />~ ~ <br />ion presented on pages B-159 and B-160 <br />~t~hs ~'f°the month of June 1994, and the <br />zss>~s~a and correct to the best of my <br />FL ° <br />~~~ ~e~a <br />6 -Z7-9'' <br />• a~.n ~v a.+zQO ~N~t~ <br />OoaO~ <br />E. Date <br />1 Engineer <br />. 19230 <br />B-160 <br />6/94 <br />