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\~ ~ r1 TO: Robert G. Liddle STATE OF COLORADO RIC HARDD LAM M. GOVe rnor 999 DEPARTMENT OF NATURAL RESOURCES D. Monte Pescoe, Executive Director MINED LAND RECLAMATION 423 Centennial Building, 1313 Sherman Street Denver, Colorado 80203 Tel. (303) 866-3567 David C. Shelton Director December 30, 1981 FROM: M. S. Savage ~I~rrQ (~~~ RE: Stipulations on Coors Keenesburg Mine Permit No. C-028-81 Bob, After reviewing Coors' submittal of December 29, 1981, I have these comments concerning stipulations 9, 10, 12, and 13. Stipulation No. 9 Coors has satisfied the requirements of Stipulation No. 9 and the concerns of the Division relative to sampling adequacy of vegetative productivity. The information from Don Nyder should be incorporated into the baseline vegetation inventory of the permit document. Stipulation No. 10 Coors has presented information from the Division of Wildlife which recommends 50-1000 stems per acre, depending on type of topography present. Coors' consultant has recommended 400 stems per acre as the reclamation standard, stating that this density is "near ideal" for a rangeland post-mining land use. The Division feels that the 400 stems per acre is a reasonable standard, but requests Coors to provide information substantiating that the 400 stems per acre is "near ideal" for a grazing post-mining land use. The woody plant density standard the Division would be willing to accept is 400 stems per acre, provided that Coors can provide adequate justification for that figure relative to a grazing post-mining land use. Stipulation No. 12 Coors has provided adequate justification for the inclusion of smooth brome, pubescent wheatgrass, and crested wheatgrass. These species will help to exclude annual weeds, provide quick cover and erosion control, and are not restricted and are compatible with the native species of the area. At this time, Coors may exclude Needle and Thread from the reclamation seed mix based on discussions presented.