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<br />:' <br />New Horizon Mine 1 <br />1. Cover -Reclaimed areas will be compared to the established reference area <br />or a technical standard of 43.9 percent ground cover (vegetation and litter) <br />depending on whether the area has been previously mined or not. <br />2. Production -Reclaimed areas will be compared to Soil Conservation Service <br />potential productivity values (technical standards) for Shavano (500 lbs./ac.) <br />or Persayo (250 Ibs.lac.) soil series depending on end land use. <br />3. Species diversity -Reclaimed areas will achieve a standard of three grasses, <br />one fort and one shrub with relative cover values greater than three percent. <br />The combined relative importance will not exceed 85 percent and no one <br />species will contribute greater than 40 percent relative importance. <br />4. Seasonal variety requirements will be waived since the proposed species will <br />support the proposed post-mining land use. <br />5. Woody plant density -The live stem success standard will be 250 stems per <br />acre on dry sites and 750 stems per acre on wet sites with at least one shrub <br />having a minimum relative cover value of three percent. <br />New Horizon Mine 2 <br />1. Cover -The success standard for irrigated pasture is based on baseline <br />surveys which indicated a total ground cover of 94.5 percent (live vegetation <br />cover of about 72 percent and litter cover of about 23 percent). T'he success <br />standard for dryland pasture is based on a cover comparison with the <br />established reference area for New Horizon. A cover success standard for <br />irrigated hayland is not applicable because revegetation success is only <br />dependent on production. <br />2. Production -Grass hayland area (this includes the prime farmland area) <br />success standards will be based on three year records (1987-1989) of other <br />hayland directly west of the proposed permit area. The first year of record <br />(1987} indicates a production of about 6.0 tons per acre per year. The <br />success standard for imgated pasture areas is based on Soil Conservation <br />Service Soil Interpretation Records (SCS Form 5's) for the Progresso Soil <br />Series. This technical standard will be 4.0 tons per acre per year. The <br />success standard for dryland pasture areas will be based on SCS Form 5's for <br />the Travesilla and Pinon soil series. The weighted average potential <br />production for the Travesilla- Finon complex is 625 pounds per acre per <br />year. <br />3. The success standard requirements for species diversity, seasonal variety, and <br />woody plant density on all three proposed end land use types will be waived <br />since post-mining land uses will be pasture and hayland. <br />20 <br />