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A vegetation survey completed in August of 1992 has shown that the <br />vegetative success standard for cover of 26 percent has been met. <br />Four-wing Saltbush (Atriplex canesums) is the dominant species in the <br />reclamation. The Division determined Four-wing Saltbush, rather than <br />Scadscale (Atriplex confertifolia), would be beneficial in the seed <br />mix, as Four-wing is more palatable to wildlife than Scadscale. As <br />the end land use is wildlife habitat, this change is acceptable. <br />Both Four-wing and Scadscale are native in the vicinity of the Red <br />Canyon Mine. Site visits have determined that wildlife is indeed <br />utilizing the reclamation. <br />E. The majority of the revegetation work has been completed during <br />initial reclamation in 1988. Areas still to be revegetate include <br />the sediment pond, associated ditches, and the lower portion of the <br />haul road. <br />XI. Post-mining Land Use <br />A. The Division is proposing to approve a post-mining land use of <br />wildlife habitat. The land use meets the criteria of Rule 4.16.3. <br />XZI. Protection of Fish. Wildlife and Related Environmental Values <br />A. The operator proposes to perform plant specific application of herbi- <br />cides if significant numbers of noxious weeds threaten successful re- <br />vegetation. The Division proposes to approve this usage <br />(4.18(4)(8)). <br />B. Fish and wildlife habitat is a planned post-mining land use. The <br />applicant has selected appropriate plant species and distributions to <br />benefit fish and wildlife (4.18 (4)(i)). <br />C. Seed mixes and distribution rates for the Red Canyon site can be <br />found on pages 132 and 132a. <br />XIZI. Protection of Underground Mining <br />A. There are no current or proposed surface mining operations within or <br />next to the Red Canyon Mine. <br />XIV. Subsidence Control <br />A. The applicant proposes a subsidence control plan in accordance with <br />Rule 2.05.6(6) to prevent material damage due to subsidence of the <br />undermined area. Extraction is to be limited to a maximum of <br />55 percent of the in-place coal. Further, within "safety zones," <br />beneath the structures delineated within the area of potential <br />influence, extraction is to be limited to 50 percent of the in-place <br />coal. Two methods of pillar stability analysis are presented to <br />demonstrate the adequacy of the designed pillar sizes to bear <br />existing overburden loads. Safety factors are demonstrated to be <br />sufficient in all cases. "Safety zones" are delineated on Map <br />2.05.6(6) (f) (ii) (c)-1 for workings within both the D and E seams. In <br />addition, a South African analytical technique is utilized to <br />demonstrate that the mine design should preclude interaction between <br />extraction within the E and D seams. The plan adopts all measures in <br />order to reduce the likelihood of subsidence, prevent material <br />damage, or mitigate the effects. The Division proposes to approve <br />the plan (4.20.1(2) and 4.20.3(1)). <br />B. The application includes the proposal of a monitoring program in <br />accordance with Rule 2.05.6(6)(c) to verify both mechanical and <br />geohydrologic projections. Monitoring wells are in place to observe <br />variations in both alluvial and bedrock aquifer water tables. Map <br />21 <br />