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Mountain Coal Company Exhibit 69 <br />West Elk Mine .. Sylvester Gulch Facilities <br />wall. Earthwork associated with the portion of road adjacent to the shaft site <br />benches is included with the shaft site earthwork described previously. <br />Substation Road <br />The access road to the substation site will have a continuous grade of 10.25%. <br />Approximately 3,200 cubic yards of topsoil will be salvaged and stockpiled for this <br />alignment. The road will be constructed using approximately 6,300 cubic yards of <br />fill of which approximately 1,000 cubic yards will be locally excavated and <br />approximately 5,300 cubic yards will be imported. Side slopes will be 2:1. None of <br />the intermittent stream paralleling this road will be relocated as a result of the fill <br />placement, although a small 0.09 acre wetland will be filled in. Wetland mitigation <br />will be in accordance with a plan and permit submitted to and approved by the U.S. <br />Army Corps of Engineers. <br />Transmission/Water Tank Road <br />An 8,450 foot (total length) light use road at an average grade of 8% will be <br />constructed from the substation northward along the east and south facing slopes of <br />Sylvester Gulch and generally paralleling the alignment of the new transmission line. <br />This road, plus approximately 400 feet of light-use access road to the transmission <br />• tower landing and one large (200 foot by 100 foot) landing will be built to support <br />construction and future maintenance of the transmission line and support structures. <br />Of the 8450 total road length, the upper 4300 feet is an extension to provide <br />secondary service and new access to the existing mine water tank. Total excavation <br />for this road is approximately 83,000 cubic yards. The Baseline Soils Study for the <br />Sylvester Gulch Facilities Area (SGFA) (1996) provided in Exhibit 27A, indicates <br />topsoil in this area is not suitable for salvage. However, topsoil will be salvaged to <br />the extent practicable, and stockpiled in nearby topsoil piles, mulched and <br />hydroseeded. The estimated topsoil volume based on a 1' thickness is 15,500 cubic <br />yards. The required fill volume of approximately 41,200 cubic yards will come from <br />excavated material. Excess excavated materials will be used for fill in other areas. <br />Existing light use roads will be utilized to access the lower portion of the <br />transmission line route (e.g., within the current disturbed mine site area). Only <br />minor grading and road base improvements (e.g., maintenance activities) will be <br />required. One large landing will also be constructed for transmission line structure <br />placement. Topsoil excavation will be approximately 120 cubic yards for the landing <br />and will be placed in a nearby stockpile. Fill will be approximately 200 cubic yards <br />of imported subbase and base coazse material. <br />i• <br />10 Nov. 1996PR07R: Revised May 1997MR216; <br />RemaedJuL 1997MR219 <br /> <br /> <br /> <br /> <br /> <br />