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II <br />• References <br />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 Conservation <br />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 Asso- <br />ciates, 1978. <br />• 4. Technical Revisions to Mining Permit #77-79, Morrison-Knudsen, Novem- <br />ber, 1979. <br />5. McGraw Hill's Quick and Easy Guide to Final Federal Surface Mining Re- <br />gulation, 1980. <br />6. "Hydrology and Sedimentology of Surface Mined Lands", C.T. Haan, B.U. <br />Barfield, University of Kentucky, 1979. <br />7. "Urban Hydrology for Small Watersheds", Technical Release No. 55, Soils <br />Conservation Service, U.S. Department of Agriculture, January, 1975. <br />n <br />lJ <br />