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• • <br /> <br />STATE OF iii iiiiiiiiiiiu iii <br />999 <br />COLORADO <br />DIVISION OF MINERALS AND GEOLOGY <br />Department of Nalu ral Resources <br />1313 Sherman $l., Room 215 <br /> <br />Denver, Colorado 80203 DIVISION o F <br />Phone: 1303) 855-3567 MINERAL S <br />FAX: 1303)832-8105 $i <br /> INTERO FFICE MEMORANDUM G E O L O G Y <br /> DIVISION OF MINERALS AND GEOLOG Y R E C L A M A T I O N <br />MINING•SAF ETY <br /> BillOwens <br />TO: Joe Dudash c°"ernor <br /> Greg E lValcher <br /> Eeecuave Ovecror <br />FROM: Mike Boulay ~ ~ Michael e. E°ng <br /> D~r~ahm Dueclor <br />DATE: March 1, 2000 <br />SUBJECT: Bowie No. 2 Mine, Permit No. C-96-083, Technical Revision No. l2 <br />I have reviewed Bowie Resources Limited's (BRL's) responses to our adequacy review letter for <br />TR-12. I have one additional comment for Item 11 concerning the construction of the vent shaft. <br />10. Response accepted. <br />l 1. BRL will grout through the water bearing zone which is approximately 0 feet to l40 feet <br />below ground surface (bgs). Please refer to their response to Item l0 in their letter dated <br />February 24, 2000. Information obtained by BRL from an exploration hole drilled at this <br />location indicates that the formations below 140 feet bgs are dry. <br />In their response to this comment, BRL states that if groundwater flows encountered below l40 <br />fee[ bgs are excessive, the formation will be grouted. I confirmed this in a telephone <br />conversation with Jim Stover of J.E. Stover & Associates on February 29, 2000. I requested that <br />Jim andlor the operator inform the Division in writing if excessive flows are encountered during <br />construction of the vent shaft. The Division should also be kept informed on any decision by the <br />operator to grout any portion of the formation(s) below 140 feet bgs. If deemed necessary, we <br />can request that the operator provide the Division with periodic progress reports during <br />construction. <br />12. Response accepted. <br />C: Larry Routten <br />