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Fall 2008 Subsidence and Geologic Field Observations <br />Box Canyon, Apache Rocks, and South of Divide Mining Areas <br />i and across the east end of future E-seam Longwall Panels E1, E2 and E3 to a connection with the <br />Dry Fork road near the eastern edge of Section 34, T13S, R90W of the 6`" P.M (see Maps 2 and <br />4). This traverse was established as a baseline for expected mining of the E-seam in late 2008. <br />Weathered and fractured siltstone, claystone and sandstone bedrock is exposed in several <br />roadcuts along the steeper portions of this traverse. Flatter portions of the traverse are generally <br />stable and on mostly soil and colluvium derived from the Wasatch Formation and from intrusive <br />rocks of the West Elk Mountains which surficially blanket much of the South of Divide Mining <br />Area. Overburden depths along this traverse vary from 1,390 to 1,600 feet over the B-seam and <br />1,100 to 1,300 feet over the E-seam. <br />A new drill pad for MDW E1-52 was constructed between June and October 2008. This pad is <br />located near the eastern end of Longwall Panel E1. This pad was designated as Location 12 for <br />the purpose of establishing a westward-looking vantage point for the remainder of the E1 Panel. <br />40 5.9.1 Location 12 <br />As stated above, Location 12 was established as a vantage point from which to view the western <br />portion of Longwall Panel E1. Figure 32 shows the materials excavated as part of the <br />preparation of the MDW pad. The upper materials are representative of the unconsolidated <br />deposits derived from rocks of the Wasatch Formation and from intrusive rocks of the West Elk <br />Mountains. The lower materials are consolidated bedrock units (mostly sandstone and shale) of <br />the Barren Member of the Mesaverde Formation. <br />• <br />831-032.790 Wright Water Engineers, Inc. Page 46 <br />December 2008