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proposed follows Colorado Division of Wildlife guidelines and has been <br />readily accepted in the past. <br />• Species diversity for the vegetation types studied falls within the <br />proposed standards. The five dominant species based upon relative cover in <br />the oakbrush and mixed shrub types had a combined relative cover values of 60 <br />and 70 percent, no one of which exceeded 60 percent. <br />The revegetation success standards previously adopted for the OVM are <br />applicable to the proposed portal site and are realistic in achievability. <br />4.2 Revegetation Seeding Mixture <br />The previously accepted seeding mixture (1983 permit, Section 2.05.4 <br />Reclamation Plan) for the Orchard Valley Mine was devised based upon a review <br />of the literature concerning revegetation in similar vegetation types and <br />Soil Conservation Service guidelines. The accepted seed mixtures allowed the <br />OVM flexibility in selecting species which reflect the natural conditions and <br />better achieve the desired land use goals. Because the proposed portal site <br />is similar to the the areas already revegetated by OVM with acceptable <br />success, the same seed mixture should be applicable to the proposed portal <br />site as well. <br /> <br />5.0 LITERATURE CITED <br />Harrington, H.D. 1964. Manual of the Plants of Colorado, 2nd ed. The <br />• Swallow Press Inc., Chicago, Illinois. <br />Nickerson, M. F. 1976. Principal Range Plants of the Central and Southern <br />Rocky Mountains: Names and Symbols. USDA Forest Service General <br />Technical Report RM-20, Rocky Mountain Forest and Range Experiment <br />Station, Ft. Collins, Colorado. <br />Snedecor, G.W. and W.G. Cochran. 1967 Statistical Methods, 6th ed. The <br />Iwoa State University Press, Ames, Iwoa. <br />Stoddart, L.A., A.D. Smith, and T.W. Box 1975. Range Management 3rd ed. <br />McGraw-Hill, New York, New York. <br />Thornton, B.J., H.D. Harrington, and R.L. Zimdahl 1974. Weeds of <br />Colorado. Bulletin 514-5 Revised. Colorado .State University <br />Experiment Station, Ft. Collins, Colorado. <br />USDI-USDA 1979. An Illustrated Guide to the Proposed Threatened and <br />Endangered Plant Species in the Rocky Mountain Region. USDI Fish <br />and Wildlife Service, Denver, Colorado. <br />USDI 1980. Endangered and Threatened Wildlife and Plants: Review of Plant <br />Taxa for Listing as Endangered or Threatened Species. Federal Register <br />vol. 45, No. 242 pp. 82480-82569. <br />• Weber, W.A. and B.C. Johnston 1979. Natural History Inventory of Colorado <br />Vascular Plants, Lichens and Bryophytes, 2nd ed. University of <br />Colorado Museum, Boulder, Colorado. <br />7 <br />