2011-12-06_REVISION - C1980001 (3)

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.. within the affected Moffat Area, the Mountain Shrub community has six (6) perennial, native species: three (3) cool - season grasses, one (1) grass -like species, and two (2) forbs. The sagebrush- snowberry community has seven (7) perennial, native: species: three (3) cool- season grasses and four (4) fortis. Chevron Mining, Inc. will reestablish vegetation similar to the relative importantspecies with regard to life form and seasonality rather than revegetating the area with species originally .:_present. Finally,, Chevron Mining, Inc. will establish at least two (2) shrub .,species in the Moffat.Area. The woody stem success standard has been determined to be 1,000 stems per acre. Information pertaining to development of revegetation success criteria for areas without replaced topsoil was received from Chevron Mining, Inc. on March 24, 1982. To satisfy the requirements of Rule 4.15.10(1) pertaining to the revegetation success criteria for previously mined areas, Chevron Mining, Inc. 'collected cover data along fifteen (15) transects. From these transects, a mean vegetative cover of 47 percent was obtained. Therefore, the revegetation success criteria for areas without replaced topsoil, pursuant to Rule 4.15.10(1), is 47 percent vegetative cover. The cover standard for riparian areas is 55 percent cover. Riparian areas along Oak Creek were disturbed prior to August 3, 1977. No topsoil was salvaged in these 'areas, and so diversity will be evaluated accordingly. The Division finds that the cover standards, for non - topsoiled and riparian areas are in compliance with the requirements of Rule, 4.15.10. The Division approved of the reference areas which the applicant selected based on the requirements of Rule 4.15.7(3). The reference areas will be utilized to determine revegetation success in a manner which the Division finds acceptable [Rule 4.15.7(4)]. VII. Protection of:Underground Mining -,The Division approved surface coal mining activities being conducted within 500 feet of an active or abandoned underground mine. This approval was based on the fact that approval for such was granted by Mine : Safety and Health Administration (MSHA) and the (then) Colorado Division of Mines. The variance was granted by MSHA based on the thickness of material, vertically separating the current operation from previous underground workings [Rules 4.19(1) and 4,22.4(1)]. VIII. Operations on Alluvial- Valley Floors C1980 =001 Edna Mine Permit Renewal No. 6 28