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Seed mix 98 is for the dryland pasture and consists of introduced species that are <br /> drought tolerant, provide site stabilization and have utility for wildlife and <br /> livestock. This seed mix was reviewed and approved by the NRCS. <br /> B. The Division proposes to approve the use of a cover crop as a means to meet soil <br /> stabilization requirements in situations where temporary soil stabilization is <br /> required prior to seeding with the permanent mix (Section 4.15.4) irrigated pasture <br /> seed mix is also approved as a soil stabilization practice pursuant to Rule 4.15.4. <br /> C. The Division proposes to approve the center pivot irrigation systems as outlined in <br /> Appendix 2.05.4(2)(e)-I and Map 2.05.4(2)(e)-1. The irrigation designs are <br /> consistent with the reclaimed topsoil configuration which will maximize the use of <br /> irrigation water. The irrigation system will be used to support the post mining land <br /> use of irrigated pasture. <br /> D. Methods to measure herbaceous cover and production are discussed in Section <br /> 2.05.4(2)(e) of the permit application. These techniques include point intercept for <br /> cover sampling and quadrat clipping for herbaceous production estimates. The <br /> Division proposes to approve use of these techniques (Section 4.15.7(I)). The <br /> sampling techniques and statistical methods to be used in demonstrations of <br /> revegetation success are in conformance with Rule 4.15.11. <br /> E. Comparisons between reclaimed and undisturbed areas, in order to demonstrate that <br /> success criteria of 4.15.8, 4.15.9, or 4.15.10 have been met, will be based on the <br /> following: <br /> The Division proposes to approve a technical standard for the production success <br /> criteria for the irrigated pasture/cropland. A technical standard is being proposed <br /> in accordance with Rule 4.15.9 because there isn't a comparable area within ERMR <br /> control that has the same soil type, access to irrigation and is planted exclusively <br /> with alfalfa. The proposed success standard will be based on the Montrose County <br /> current year alfalfa yield or the long-term average alfalfa yield (if the annual yield <br /> is not available). The success standard is discussed in further detail in Section <br /> 2.05.4(2)(e) of the permit. <br /> Dryland Pasture (DP)—The success standard for reclaimed Dryland Pasture is <br /> based on comparison to a Dryland Pasture Reference area. Successful cover and <br /> production will be demonstrated by statistically valid demonstration of reclaimed <br /> area/reference area comparability in accordance with applicable requirements of <br /> Rule 4.15 and as described under Dryland Pastureland Success Criteria and <br /> Statistical Procedures beginning on page 25 of Section 2.05.4(2)(e) of the permit <br /> application. In lieu of a species diversity standard, a forage quality standard will be <br /> implemented that is outlined in Section 2.05.4(2)(e) page 30. A woody stem <br /> density is not required for revegetation success (4.15.8(7)). <br /> 25 <br />