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erosion is being controlled, and that sediment is not being transported off-site. BMPs would be <br />inspected after significant storm events and maintained as necessary. Appropriate materials <br />would be kept on hand to enable quick response for required BMP maintenance. <br />Holes would be rotary drilled and nominally five to six inches in diameter to predetermined core <br />points. The holes would be cased as necessary. The coal zone would be cored by PQ wireline <br />methods. PQ coring produces a 2.980-inch hole and a 1.875-inch core. Drilling would be with <br />air, air with water injection or water with synthetic polymer lubricant. <br />Drilling would be accomplished with one of two drill rigs. One is a truck mounted core rig such <br />as a DR 24 or equivalent and the other a truck mounted rotary rig such as a RD 20 or equivalent. <br />Truck mounted drilling rigs would be accompanied by a water truck (typically 3,000 gallon <br />capacity). A flat bed service truck and smaller pickup trucks would be used as necessary for <br />service and transportation. <br />Water would be provided to drill sites SS-5, SS-9, SS-11 and 2010-1 via a two-to-three inch <br />diameter, high-pressure waterline. Water would be pumped from the East Fork of Terror Creek <br />with a Bean pump or equivalent. To protect sensitive fish habitat, no water would be pumped <br />from the West Fork of Terror Creek. The pump(s) would be placed in a sheet metal horse trough <br />and located adjacent to the East Fork of Terror Creek. The trough would be capable of <br />containing the full volume of the engine oil and fuel supply used for the pumps in case of a leak. <br />M Coffer dams made of heavy duty plastic will be used to pool water where pump intakes will be <br />located. The cofferdams and pump intakes would be screened using 0.25 inch or finer mesh to <br />preclude fish from passing through. The waterline would be placed along the road. If necessary, <br />water would be released from Terror Creek reservoir to augment the flow in East Terror Creek. <br />In the case of SS-1 and SS-2, a water truck would supply the necessary water. The water would <br />be hauled from either a municipal or private water source. Neither of these sources would be in <br />the West Terror Creek drainage. Total water use, for drilling and dust abatement, is expected to <br />be less than 1.5 acre feet (approximately 60 days at 5 gpm). <br />Some or all of the holes may be geophysical logged. The equipment necessary for such work is <br />typically mounted in a full size Suburban type 4 x 4. If only oil field logging equipment is <br />available, larger trucks similar in size to a water truck may be required, but would not require <br />any additional disturbance. <br />Table 1 provides a summary of the activities and initial disturbance broken out by ownership. In <br />total there would be approximately 7.3 acres of new disturbance with approximately 5.4 acres on <br />USFS managed lands and 1.9 acres on BLM managed lands. There would be approximately 5.7 <br />acres of re-disturbance associated with the refurbishing of the existing access roads with <br />approximately 1.4 acres on USFS managed lands, 0.6 acres on BLM managed lands, and 3.7 <br />acres on Bowie property. Approximately one half of the disturbance on BLM land associated <br />with the access road to 2010-1 is outside the proposed CEL, but falls within Bowie's existing <br />coal lease (COC-61209). With the exception of a portion of pad 2010-1, all new disturbances <br />and acreage outside that necessary for continued access on refurbished roads would be <br />reclaimed. Table 2 provides a summary of the activities and disturbances after exploration has <br />been completed and reclamation has taken place. <br />DOI-BLM-CO-S050-2010- 0017 EA Page 7 of 43 May 2010