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<br /> <br /> <br /> <br />PR-04, Colowyo Coal Mine C1981-019 18 August 2016 <br /> <br /> <br /> <br />3.2.3 Coal Resources to be Mined <br /> <br />In the Collom permit expansion area, Colowyo will mine coal in the Danforth Hills coal field. <br />Coal seams Y, X, A, B, C, E, F, and G are proposed to be mined in the Collom Pit. Seam <br />thicknesses vary in the Collom permit expansion area from 5 to 11 feet. The general stratigraphy <br />within the Collom permit expansion area is depicted in Exhibit 6, Item 7, Figure 3.1, and Exhibit <br />6, Item 8. <br /> <br /> <br />3.2.4 Topography <br /> <br />The Collom permit expansion area is located west of the West Pit, and expands the current <br />western permit boundary to just west of Collom Gulch. It is bounded on the west by Morgan <br />Creek, and includes Collom Gulch, Little Collom Gulch and the West Fork of Jubb Creek. <br />Elevations in the Collom permit expansion area range from just below approximately 6,400 feet <br />mean sea level to approximately 8,570 feet. Slopes in the Collom permit expansion area range <br />from moderately steep to steep drainages (> 35 percent) to benches between the drainages (from <br />1 percent to 5 percent). The predominant land uses in the Collom permit expansion area are <br />rangeland and fish and wildlife habitat, with smaller acreage characterized as pastureland. <br /> <br />3.2.5 Geology <br /> <br />Geologic information is found in Sections 2.04.6, Maps 7 through 9A, and Exhibit 6 of the PAP. <br />The permit area and Collom permit expansion area are south of the axis of the Axial Basin <br />Anticline, a large northwest-trending fold found in the southern Uinta region of the Piceance <br />Basin. The southern limb of the Axial Basin anticline is shared with the Collom syncline. The <br />southern limb of the Axial Basin anticline is shared with the Collom syncline. The anticline and <br />syncline consist of thousands of feet of marine deposited sediments of Cretaceous age. <br /> <br />To the south of the anticline, the axis of the Collom Syncline, a downward fold, passes directly <br />through the permit area, trending north 70 degrees west and plunging from 0 to 20 degrees to the <br />North. In the northeastern corner of the permit area, near Streeter Fill, the Collom Syncline is <br />influenced by the Elkhorn Syncline which results in strata having an eastward dip and north- <br />south strike (see Map 7 and Figure 1 in the PAP). <br /> <br />There appears to be no evidence of faulting in the permit area; however, linear features that may