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<br />• Page 3 <br />. Description of Applicant's Proposal <br />In 1977, Utah International bega^ its operations at Trapper Mine with <br />topsoil removal by bulldozers. The topsoil is placed on regraded spoil <br />piles or is stored for later replacement. After the topsoil is removed, <br />the overburden is drilled with rotary drills to the top of the first coal <br />bed to be mined which is from 15 to 150 feet deep. These holes are filled <br />with an AN-FO mix along with multiple detonators to ensure proper <br />detonation. Following blasting, a dragline strips the overburden to the [op <br />of the coal bed. The top of the uncovered coal is cleaned with a front-end <br />loader or rubber-tired dozer. The coal is either ripped with a dozer or <br />drilled and blasted with AN-F0. Large dozers or front-end loaders are used <br />to load the coal into haul trucks which transport the coal to the power <br />plant's grizzly and coal stockpiles. After the bed has been mined and the <br />interburden blasted, the dragline walks to the original beginning on the <br />spoil side and strips to the next bed. The dragline will cast the <br />interburden material as far as the 2nd and 3rd spoil rows,. Utah <br />International strips down tb 150 feet. The piLS will rem:~in active for <br />230 to 345 days. <br />The principle mining method is dip-line mining, where mining is in strips <br />that are parallel to the uphill dip of the coal. Each pit is adjacent and <br />parallel to the previous one. Pit widths vary according to the specific <br />• site. Each cut is initiated and worked updip toward thecoal outcrop. <br />There are three active pits at the Trapper Mine: Ashmore, Derringer, and <br />Enfield. The Ashmore pit is 150 by 1,800 feet and is located in the SE 1/4 <br />of section 33. Only 500 feet of the 1,800 feet is in Lease C-07518. There <br />is 1,100 feet of advance east to the lease boundary. By the eod of 1981, <br />the lease area mined by the Ashmore pit should be graded and topsoil <br />replaced. In 1985, the pit will be advanced to the SW 1/4 of section 35. <br />In the E 1/2 W 1/2 of section 4, the Derringer pit is advancing eastward. <br />The 200- by 2,500-foot pit has 900 feet of advance left before the boundary <br />of Lease C-07518. In 1985, Utah International expects the pit to be <br />advanced 1,800 feet east into fee coal. <br />The Enfield pit is in the NW 1/4 of section 2 and is advancing west. The <br />pit is 150 by 3,500 feet. There is 4,000 feet of advance left until the <br />boundary of Lease C-07518. In 1985, Utah International expects the pit to <br />be 2,300 feet from the boundary into the NE 1/4 of section 3. <br />Four beds, the H, I, Q, and R are recovered. Other beds may be recovered <br />such as the L bed, The Ashmore pit mines the H and I beds, the Q and R beds <br />are recovered in the Derringer pit, and the Enfield pit only mines the Q bed <br />because the R bed is too deep. <br />C7 <br />