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~~ ASTERN <br />FUELS <br />ASSOCIATION <br />UVG <br />- 7be Na(iau+l <br />_ _- Fue[Supp[y <br />Ceopera(ree <br />Mr. Dan Mathews <br />Division of Minerals & Geology <br />2148 Broadway, #CS <br />Grand Junction, CO 81503 <br />III IIIIIIIIIIIIIIII <br />999 <br />RECEIVEp <br />*~ l <br />;(:;;; ;~ ;} 1 <br />' '~ '9B <br />Dlvlebn of ~fneryfy 6 <br />~dJungbq <br />February 24, 1998 <br />RE: MINOR REVISION REQUEST (MR111) - DRILLING OF FOUR VENT HOLES <br />(LW11-5 TO LWii-7 AND LW12-1 TO LW12-8). PERMIT NO. C-81-018. <br />DESERADO MINE. <br />Dear Mr. Mathews: <br />This application is for a minor revision to drill an additional nine (9) vent holes over the remaining <br />part of longwall panel #11 (LW11-5, LW11-6 and LW11-7) and overall of longwall panel #12 <br />(LW12-1 to LW12-6). Map 138 has been revised and submitted herewith to show the drilling <br />locations. <br />The proposed drilling locations will be prepared by removing and stockpiling topsoil and <br />vegetation to be used in reclamation. Pits will be cut in undisturbed (non-fill) ground to contain <br />cuttings and fluids used while drilling. Once the holes are not required, each of the holes will be <br />plugged as specified in the permit. A surface cement plug will be installed from surface to 10 feet <br />and a surface marker set. All pits will be pumped out and backfilled and the site recontoured as <br />soon as practical. The drill hole sites will be disked and seeded with 20 Ib/acre of seed mixture <br />as shown in Table V-14 of the permit. Runoff from the drill sites will be controlled as per the <br />permit document language. <br />The hole depth will vary trom about 225 feet to about 470 feet and the average hole depth is <br />about 370 feet. It will be constructed by drilling 12-1/4" hole to 40', hanging and cementing 40' <br />of 9-5/8" casing, drilling from 40 feet to the total depth with 8-5/8" bit and hanging 6" schedule <br />40 PVC perforated well casing to the bottom of the hole. <br />PO Box 33424 <br />Denver, ~ 803-3424 <br />Telephone 303/450-9976 <br />Fax 303/450-104? <br />E-mail w(alxkewoodepcisys.net <br />