Laserfiche WebLink
• Sedimentation System Calculations <br />All sediment control calculations were redone using the method described in <br />Appednixes D and E of "Procedures for Determining Peak Flaws in Colorado" <br />(U.S. Department of Agriculture. Soil Conservation Service, March, 1980), <br />taking into account watershed shape and siope corrections. Average slope <br />calculations were taken into account in calculations of runoff, peak dis- <br />charge and soil loss where necessary. <br />All necessary information used to generate curve numbers is shown on the <br />irdividual calculation sheets. <br />A71 channels were redesigned and sufficient dimensional detail to determine <br />all necessary open channel flow calculations are presented. Channel slopes <br />were changed to limit areas where erosive velocities might occur. Linings <br />were mentioned as flumes in all cases. <br />Calculations were done using the following references and publications: <br />].) Procedures for Determining Peak Flows in Colorado, U.S. Department of <br />Agriculture, Soil Conservation Service, 1980. <br />2.) Universal Sail Loss Equation - Technical Note 50, U.S. Department of <br />Agriculture, Soil Conservation Service, 1977. <br />• 3.) Hydrology and Sedimentology of Surface Mined Lands, C.T. Haan and B.J. <br />Barfield, 1979. ' <br />4.) Erosion ans Sediment Pollution Control, R.P. Beasly, 1972. <br />5.) Handbook of Steel Drainage and Highway Construction Products, American <br />Iron and Steel Institute, 1971. <br />Calculations for North decline and 2 West Portals included calculation done on <br />TRIHYDRO V2.2 Jan. 1986, Western Water Consultants, Inc., Laramie , WY. <br />Calculations since 1993 - Sedcad + ~ ersion 3, 1993 Civil Software Design, Ames, IA. <br />• <br />lids"~ - 3 (New 3/1/96) <br />