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J. E. STOVER & ASSOCIATES, INC. 7R.I(o? <br />2352 NORTH 71h STREET, UNIT B <br />GRAND JUNCTION, COLORADO 81501 <br />PHONE: (970) 245-4101, FAX 242-7908 <br />MINE ENGINEERING CIVIL ENGINEERING <br />MINE RECLAMATION CONST. MANAGEMENT <br />December 10, 2009 <br />J. J. Dudash <br />Division of Reclamation, Mining and Safety <br />1313 Sherman St., Room 215 <br />Denver, CO 80203 <br />Re: Bowie Resources, LLC, Bowie No. 2 Mine <br />Application for a Technical Revision <br />Ventilation Shaft Construction <br />Permit C-1996-083 <br />Dear Mr. Dudash: <br />DEC 14 2009 <br />Division of Reclamation, <br />mining and Safety <br />On behalf of Bowie Resources, LLC, (BRL) enclosed is an application for a technical <br />revision to provide for the construction of a ventilation shaft west of Terror Creek. The <br />proposed construction site is on BLM managed land <br />Project Narrative <br />The shaft will be raise bored its entire depth of approximately 690 feet. The cuttings <br />from the raise bore will be permanently stored underground. The shaft is to be lined <br />with shotcrete and have a finished diameter of 18.5 feet. A ventilation fan is not <br />required for the shaft since pressure from the mine ventilation system will force air out <br />the shaft. The shaft will be equipped with an escape hoist and nitrogen generator. The <br />electrical powered compressors needed to run the nitrogen generator will be fed by an <br />underground power cable. BRL will need frequent access to the site to test the escape <br />hoist. The perimeter of the shaft will be grouted to minimize water infiltration. Grouting <br />will be extensive in the water bearing zones. <br />Activities necessary for the successful completion of the shaft include the following: <br />1. Drill and grout perimeter of shaft to seal off water bearing zones and possibly <br />solidify areas of incompetent rock. <br />2. Install concrete shaft collar (30'X 30'X 4' thick). <br />3. Drill 18" diameter pilot hole. <br />4. Raise bore 20-foot diameter shaft. (cuttings stored underground) <br />5. Install 9-inch thick shotcrete lining in shaft. (1200 cubic yards of concrete) <br />6. Install escape hoist. <br />7. Install nitrogen generator system powered by electrical compressors. Power <br />from underground.