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ROBINSON <br />BRICK ~ <br />COMPANY ~ <br />~~~ <br />~~ <br />December 11.2003 <br />Mr. Harry Posey <br />Senior Reclamation Specialist <br />Colorado Division of Minerals and Geology `- <br />1313 Sherman Street, Room 215 <br />Denver, CO 80203 <br />i <br />Re: M-81-148 Technical Revision <br />Chieftain South Mine, Jefferson County, Colorado <br />Dear Mr. Posey, <br />~i~ <br />S~mrHa I ~ <br />~~~~~~~~ <br />DEC 1 2 2003 / <br />t]ivisien of A4inerals and Geology <br />Robinson Brick Company (Robco) requests a Technical Revision for the Chieftain South Mine, Jefferson <br />County, Colorado. The Chieftain South Mine, operating under mine permit number M-81-148, requests a <br />change in the sequence of mining and a change in the maximum allowable disturbance a[ any one time <br />within the affected land boundary which encompasses 131.51 acres. <br />Staein¢ <br />Robco has enclosed revised pages 10, 11, l2, 13, and 24. Mining activities will occur simultaneously <br />within the stages, as mining progresses from south to north on the west half of the area and progresses from <br />north to the south on the east half of the area. Exhibit D-1, Minin>; Plan and Stages Map remains <br />unchanged. <br />Maximum allowable disturbance at any one time <br />Robco has enclosed revised pages 50 and 51 of Exhibit L, addressing the increased acreage and <br />reclamation cost. Currently the maximum allowable disturbance is 52.69 acres. The TR maximum <br />disturbance is increased to 98.5 acres, all contained within the mining stages designated on Exhibit D-1. <br />There is no change to the final reclamation plan. The additional disturbed acreage is primarily allocated for <br />product storage piles, topsoil stockpiles and the associated ramps and roads accessing these ancillary areas. <br />The reclamation costs are updated to reflect current acreages and costs. <br />A check for the TR submittal is enclosed. In addition, Robco has included a copy of the revised permit <br />pages with all changes and additions highlighted. Robco appreciates your timely approval of this TR. <br />Please contact me at 303-783-3061 if you have any questions. <br />Sincerely, <br />Robinson Brick Company <br />~iz~bl~XJ/~ <br />Gregory W. Knell, C.P.G., C.H.M."M.~~ <br />Regulatory Specialist <br />Enclosures <br />I) Revisedpermitpages <br />2) Highlighted permit pages <br />3) Check Payable to Colorado Division of Minerals and Geology, $188.00 <br />1845 West Dartmouth Avenue Denver, Colorado 80110-1308 <br />Sales (303) 783-3000 Toll Free (800) 477-9002 Fax (303) 781-1818 <br />Web-site: www.robinsonbrick.com <br />