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� Y <br /> 3. Species diversity - Reclaimed areas will achieve a standard of <br /> three grasses , one forb and one shrub with relative cover values <br /> greater than three percent. The combined relative importance <br /> will not exceed 85 percent and no one species will contribute <br /> greater than 40 percent relative importance. <br /> 4. Seasonal variety requirements will be waived since the proposed <br /> species will support the proposed post-mining land use. <br /> 5. Woody plant density - The live stem success standard will be <br /> 250 stems per acre on dry sites and 750 stems per acre on wet <br /> sites with at least one shrub having a minimum relative cover <br /> value of three percent. <br /> New Horizon Mine 2 <br /> 1 . Cover - The success standard for irrigated pasture is based on <br /> baseline surveys which indicated a total ground cover of <br /> 94.5 percent ( live vegetation cover of about 72 percent and <br /> litter cover of about 23 percent) . The success standard for <br /> dryland pasture is based on a cover comparison with the <br /> established reference area for New Horizon. A cover success <br /> standard for irrigated hayland is not applicable because <br /> revegetation success is only dependent on production. <br /> 2. Production - Grass hayland area (this includes the prime farmland <br /> area) success standards will be based on three year records <br /> (1987-1989) of other hayland directly west of the proposed permit <br /> area. The first year of record ( 1987) indicates a production of <br /> about 6.0 tons per acre per year. The success standard for <br /> irrigated pasture areas is based on Soil Conservation Service <br /> Soil Interpretation Records (SCS Form 5' s) for the Progresso Soil <br /> Series . This technical standard will be 4.0 tons per acre per <br /> year. The success standard for dryland pasture areas will be <br /> based on SCS Form 5' s for the Travesilla and Pinon soil series . <br /> The weighted average potential production for the Travesilla- <br /> Pinon complex is 625 pounds per acre per year. <br /> 3. The success standard requirements for species diversity, seasonal <br /> variety, and woody plant density on all three proposed end land <br /> use types will be waived since post-mining land uses will be <br /> pasture and hayland. <br /> The Division proposes to approve these standards . <br /> E. The Division has already approved of the reference area used for the <br /> New Horizon 1 area which the applicant has selected based on the <br /> requirements of Rule 4. 15. 7(3) . <br /> F. The reference areas will be utilized to determine revegetation <br /> success in a manner which the Division finds acceptable 4. 15.7(4) . <br /> -21- <br />