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BRIERLEY <br />ASSOCIATES <br />Limited Liability Company <br />'Creating Space Undergrwmd <br />2329 West Main Street <br />Suite 201 <br />Littleton, CO 80120 <br />303.703.1405 <br />fax 303.703.1404 <br />May 18, 2004 <br />File No. 00036-002 <br />Division of Minerals & Geology <br />1313 Sherman Street, Room 215 <br />Denver, CO 80203 <br />Attention: Mr. Harry Posey <br />Subject: DMG File No. M-1987-049 <br />Proposed Technical Revision No. 2v <br />Ready Mixed Aggregates <br />Bromley Lakes Pit <br />Brighton, Colorado <br />Dear Mr. Posey: <br />,~.bm~y--~cu ~ <br />RECEIVED <br />MAY 19 2C~4 ~ <br />Division of Mincrals and Geology <br />Brierley Associates, LLC, is pleased to submit this request for a Technical Revision to <br />the subject permit on behalf of Ready Mixed Aggregates. The purpose of this proposed <br />Technical Revision (No. 2) is to switch the order of mining of two phases in the central <br />part of the site. Specifically, the operator proposes to switch Phases 7 and 8, thereby <br />beginning mining on the east half rather than the west half of this middle portion of the <br />overall site area, as was proposed in Amendment AM001. The new Phase 7 and 8 will <br />comprise approximately 19.1 acres and 23.4, respectively. <br />Enclosed with this letter are two (2) revised copies of Figure D-1, Exhibit D -Mining <br />Map showing the phasing change described above. Based on oral communications with <br />your offices in early Apri12004 the operator began initial stripping operations in the new <br />Phase 7 area because this mining phase change of roughly equivalent subareas within the <br />mine site has no impact to the site bond requirements. <br />If you have any questions about the enclosed information, please contact Bill Timmons or <br />me and we will be happy to assist the Division with any additional desired information. <br />Sincerely, <br />Alan L. Howard R.G., C.E.G. <br />Vice President <br />C: Bil] Timmons (RMA), File <br />Enclosures <br />5 <br />www. brierleyassociates. com <br />