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reference aze by over 50%. The operator conducted vegetation sampling in accordance with DMG <br />guidelines48. <br />Vegetation Success Standard for Alluvial Valley Floors <br />The portion of the AVF along the Roaring Fork River in Garfield County that was impacted by <br />mining operations had a conveyor and conveyor access road upon it. The conveyor and support <br />footers were removed or buried in place depending upon the footers placement on the slope. The <br />pastureland, of which the corridor is a part, is irrigated and grazed by cattle and horses. The corridor <br />area accounts for 0.6 acres. One transect fell within the corridor area. The production measured 49 <br />along this one transect of the reclaimed conveyor corridor was 73.3 grams/ t/z mz (1323 lbs./acre). <br />The 0.6 acre affected portion of the AVF is insignificant to the portion of the pasture within the <br />permit area, and to the pasture as a whole. <br />Vegetation Success Standazd for Diversity <br />The cover data collected in July 2000 indicates that seven perennial plant species meet the criteria for <br />the diversity standard. Four perennial non-noxious grass species were measured at greater than 3 <br />percent relative cover and less than 60 percent relative cover. These four species were Crested <br />wheatgrass (Agropyron cristata), Orchazdgrass (Dactylis glomerata), Thickspike wheatgrass <br />(Agropyron dasystachyum), and Russian wildrye (Elymus junceus). Two forb species met relative <br />cover concentrations: Cicer milkvetch (Astragalus titer) and Yellow sweetclover (Meli[otus <br />officianalis). One shrub species, Rubber rabbitbrush (Crysothamnus nauseosus), was present at 6.6% <br />relative cover. The species present support the post-mining land-use, are non-noxious and non-toxic, <br />and exceed the diversity reclamation standazd for the North Thompson Creek Mine. <br />Bond for Revegetation <br />The cost for a third party to reestablish revegetation at both the mine and loadout sites, $6,478, is <br />included in the Division's estimate of the cos[ of remaining reclamation work so <br />Contributions of Suspended Solids <br />A demonstration was made in July 1992 that untreated surface runoff from the reclaimed mine site <br />does not contribute additional suspended solids above natural conditions St. There has been no <br />recorded incident [Colorado Department of Public Health and Environment (CDPHE) discharge <br />monitoring reports or monthly inspection by the Division] of discharge from the two unreclaimed <br />permanent sedimentation ponds. A number of other authorized sedimentation ponds have been <br />°B Guideline Regarding Selected Coal Mine Bond Release Issues, April 18, 1995 <br />d9 PAP Appendix 3-X Phase Ii & III Bond Release Revegetation Success Sampling February, 2001 <br />so Division estimate of 3 Oct 2001 (with revisions through 10/18/01) <br />st see Soils Loss Comparison -North Thompson Creek Mine Sites, pages 4-19i through 4-l9iii of the PAP <br />SL-04, C-81-025 <br />November 13, 2001 <br />Page 12 of 16 Pages <br />