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The C4JI pollution abatement measures v~ill be designed to ensure <br />• permanency, require little need for continued maintenance, and present a <br />p]easing aesthetic appearance. An adequate topsoil cover on the spoils, <br />if maintained with a vigorous stand of vegetation will prevent erosion <br />and also greatly diminish acid-forming processes. <br />The vegetation will function as an oxygen-consuming layer. It will <br />'__ be managed so that there is a sufficiently high concentration of organic <br />I <br />matter to support aerobic bacterial activity. Such a layer should be <br />~- <br />j effective in removing oxygen from the soil atmosphere before it reaches <br />_ the underlying •spoils. Moreover, the consumption of water for plant <br />~ oroo-rth will greatly reduce seepage through the embankment and thus minimize <br />leaching of salts. A surface drainage system will prevent the ponding of <br />o-rater and also divert surface runoff from short duration hioh-intensity <br />• storms away from the waste disposal area. <br />REFERENCES <br />~~ Leaf, Charles F., 1977. Environmental hydrology Colorado bJestmoreland, Inc. <br />Orchard Valley Mine. Paonia, Colorado. Fourth Quarterly Report: <br />`- 'dolume II, submitted to Thorne Ecological Institute, Boulder, Colorado. <br />^tiiler, J. F., R. H. Frederick, and R. J. Tracey, 1973. NOAA Atlas 2, <br />- Precipitation-frequency atlas of the llestecn lJnited States (III) <br />Colorado. U.S. Dept. Commerce, Nat. Oceanic and Atmos. Admin. (FJOA.4), <br />Nat. 4leather Service, Silver Spring, Flaryland. <br />lJnited States Environmental Protection Agency, Coal mining point source <br />I category: effluent limitations guidelines for existing sources. <br />I Federal Register, Part III issued Tuesday, April 26, 1977. Suot. <br />`- Documents, U.S. Government Printing Office, :Jashington, D.C. <br />United States Soil Conservation Service, 1972. Soil Conservation Service <br />-- fJational Engineering Handbook, Section 4: Hydrology. Supt. Documents, <br />U.S. fovernment Printing Office, IJashington, D.C. <br />• <br />