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<br />Proposed Decision and Findings of Compliance July 2018 <br />Permit Renewal No. 7 P a g e | 13 <br />clearance of the final AVS check, the proposed decision will be issued and considered final within <br />five days of the close of the public comment period (Rule 2.07.4(3)(c)). <br />4.0 Description of the Environment <br />4.1 Maps <br /> <br />United States Geological Survey (USGS) Topographic Map 7.5 Minute Quadrangl es, Axial and <br />Ninemile Gap, Colorado, cover the area of the permit. <br />4.2 General, Disturbed and Affected Area <br /> <br />The Mine is located approximately 28 miles southwest of Craig, Colorado, near State Highway <br />13. The majority of the permit area and current operations (including the mine pits, the <br />administrative office, shops, warehouses, general offices and a rail loadout facility) are located in <br />Moffat County. Approximately 1,000 acres of the South Taylor Pit, approved in PR-02, is located <br />in Rio Blanco County. All of the coal currently mined in the South Taylor Pit is in Rio Blanco <br />County. With the approval of PR-04, Colowyo has begun construction on support facilities <br />associated with the Collom Pit. All disturbance actives are limited to the approved information <br />provided in Exhibit 13C of the Colowyo PAP. <br /> <br />Colowyo owns approximately 83 percent of the surface acreage of the current permit area. An <br />additional 13 percent (approximate) is Federal land managed by the BLM, and the remaining <br />four percent is State of Colorado land. The mine operation consists of several pits operating <br />within 27,529 permitted acres. <br />4.3 Coal Resources to be Mined <br /> <br />Eight major coal seams were mined in the East Pit, West Pit and Section 16 Pit at the Mine. These <br />are the "Y", "X," "A", "B", "C", "D", "E" and "F" seams. The seams vary in thickness from 2.5 to <br />15 feet, and overburden thickness varies as a function of structural geology and topography. <br /> <br />In the South Taylor Mining area, 17 seam and sub-seam complexes are mined. The seams are the <br />“A”, “B”, “C”, “D”, “E”, “F” and “G” seams and their seam complexes (for example, the G-Seam <br />is separated into G7, G8 and G9 in the South Taylor Area). The seams vary in thickness from 1.5 <br />feet to 17 feet and the overburden and interburden thicknesses vary, on average, from 2 feet to 65 <br />feet. Figure 2.04.6-3B in the PAP contains a generalized diagram of the seams to be mined as well <br />as the overburden and interburden. <br /> <br />Seems to be mined in the Collom Pit include the “Y”, “X”, “A”, “B”, “C”, “E”, “F”, and “G”. The <br />lowermost seam planned for development is the G(ab). Figure 2.04.6 of the PAP shows the <br />geologic cross-sections and dip of all the coal seams to be mined. Cross section locations are <br />shown on Map 11B of the PAP.