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the field from 1978 to 1984. The report was published in 1986. This survey can be obtained on <br />the internet at http: / /offices.usda.gov/ scripts /nd1SAPI.d11 /oip_public/USA map. <br />• <br />At the NH2 Mine, WFC utilized a soil correction factor to adjust for different productivity levels <br />of the different soil types since there had been no valid statistical comparison of any baseline <br />predisturbance Irrigated Pasture areas with the proposed Irrigated Pasture Reference Area. <br />However, intensive baseline vegetation surveys performed during the summer of 2009 on four <br />different irrigated pasture areas on and immediately adjacent to the NHN Mine site, on the <br />Garvey, Meehan, Glasier and Carver properties, clearly established that there is a high degree of <br />statistical similarity between the baseline predisturbance areas of Irrigated Pasture and the <br />previously approved Irrigated Pasture Reference Area. Given this similarity and the fact that a <br />pure random sampling of the Irrigated Pasture Reference Area results in a weighted average that <br />takes into consideration the differences in soil types, relative to the NUN Mine no soil correction <br />factor is proposed for the proposed postmining revegetation success monitoring. <br />Revegetation Success Criteria and Statistical Procedures - Reclaimed Irrigated <br />Pastureland. <br />Revegetation will be deemed adequate if vegetation cover and herbaceous production at the <br />reclaimed site is at least 90% of the vegetative cover at the reference area and herbaceous <br />production is at least 90% of the reference area standard. One of the statistical comparison <br />methods in DRMS Regulations 4.15.11(2) subsections (a), (b), or (c) will be used to document <br />revegetation success of all irrigated pasture reclaimed areas. <br />When TR -58 at the NH2 Mine was approved, the CDMRS required that in lieu of a species <br />diversity standard for the reclaimed irrigated pasture areas there would instead be a forage <br />quality standard. Therefore, the following forage quality standard was proposed and approved <br />for the NH2 Mine and is proposed for the NHN Mine as well: <br />At least 75% of the relative production will be comprised of seeded species or <br />species of comparable quality as livestock forage. Montrose County or San <br />Miguel County listed noxious weed species will not be counted toward the <br />Section 2.05.4(2) (e) Page 17 April 2011 <br />