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• 12 inch culvert will carry 2cfs. Since culverts C1 and C2 are <br />located such that they will never see more than a fraction of the <br />flow from a 10 year, 24 hour precipitation event, the installation <br />of a 12 inch culvert is specified. <br />• <br />1. Urban Hydrology for Small Watersheds Technical Release No. 55 <br />Soil Conservation Service, USDA, January-1985, P.B-13 <br />2. Procedures for Determining Peak Flows in Colorado <br />Soil Conservation Service, January-1977, P.79,80 <br />3. Procedures for Determining Peak Flows in Colorado <br />Soil Conservation Service, January-1977, P.15 <br />4. Applied Hydrology and Sedimentology for Disturbed Areas, <br />Barfield, B.J., R.C. Warner, C.T. Haan, Oklahoma Technical Press, <br />815 Hillcrest, Stillwater, OK 74074, 1983, P.314 <br />5. Ibid, P.330 <br />6. Ibid, P.334 <br />7. Ibid, P.338 <br />• <br />-7- <br />