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1. "Precipitation -Frequency maps for Colorado", Specific Studies Branch, <br />Office of Hydrology, Environmental Sciences Services Administration, U.S. <br />Western Bureau, 1967. <br />2. "Procedures for Determining Peak Flows in Colorado" , Soil Conserva- <br />tion Service, U.S. Department of Agriculture, 1977. <br />3. Soil and Foundation Investigation for the Proposed Five Earthfill Em- <br />bankments, Hayden Gulch Coal Mine, Routt County Colorado, Chen and <br />Associates, 1978. <br />4. Technical Revisions to Mining Permit #77-79, Morrison-Knudsen, <br />November, 1979. <br />5. McGraw Hill's Quick and Easy Guide to Final Federal Surface Mining <br />Regulation, 1980. <br />6. "Hydrology and Sedimentology of Surface Mined Lands", C.T. Haan, <br />B. U. Barfield, University of Kentucky, 1979. <br />7. "Urban Hydrology for Small Watersheds", Technical Release No. 55, <br />Soils Conservation Service, U. S. Department of Agriculture, January, <br />1975. <br />The amount of rainfall and direct runoff are derived from rainfall maps <br />contained in references 1 and 2. The precipitation amounts were taken <br />from annual maps which are based on all months of the year without re- <br />gard to the type of precipitation: rain, rain and snow mixed, al] snow, <br />hail, etc. Thus, there is no storage capacity denoted for snow melt since <br />compensation has been included in the precipitation amounts. <br /> <br />