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post mining land use goals. CWI proposes to plant a variety of species <br />• selected from the list of species at Appendix A. This will allow CWI the <br />flexibility to chose species depending upon the price and availability of <br />seed and tublings. The manner of planting and seeding will remain as <br />previously described in CWI reclamation plan. <br />Appendix A contains several introduced species which CWI plans on <br />utilizing in the proposed seeding mixture. Regulation under Section <br />816.112 allows for the use of introduced species upon approval by the <br />regulatory authority after appropriate field trials have demonstrated that <br />the introduced species are desirable and necessary to achieve the approved <br />postmining land use. <br />The introduced species~~roposed for use at the Orchard Valley Mine <br />include pubescent wheatgrass, alfalfa, titer milkvetch and small Burnet. <br />Four out of a total of 28 species proposed for use are introduced. On a <br />seed number basis 85.9 percent of seeds proposed for seeding are native. <br />The introduced species are included in the mixture because they are <br />necessary to control erosion and because they provide forage for livestock <br />and wildlife in the area. Various researchers have documented the <br />superiority of the introduced species under similar conditions. These <br />studies are summarized as follows: <br />Of the species recommended for seeding the mountain browse type in <br />Colorado, Colorado State University (1974) recommends desert wheatgrass, <br />hard fescue, intermediate and pubescent wheatgrasses, russian wild rye, and <br />smooth brome. The species recommended by Hull, et. al. (1952) for <br />reseeding the mountain brush type include desert, pubescent, and <br />intermediate wheatgrasses, hard fescue, smooth brome, russian wildrye, <br />alfalfa, and orchardgrass. <br />t•1cGinnies, working on rangeland two miles south of Hayden, Colorado, <br />reported that 15 species were planted in a test plot in 1945 and evaluated <br />until 1958. The most outstanding species on this plot was pubescent <br />wheatgrass followed by intermediate wheatgrass. These species produced the <br />greatest amount of soil protection and forage. Desert wheatgrass was the <br />next best species-~ Br~dless wheatgrass was inferior in initial <br />ti establishment but appeared to be improving. Species performing fair to <br />,- <br />,.~ pour included green ne2dleyrass, big bluegrass, and western wheatgrass. <br />-3- <br />