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<br />ROBINSON <br />BRICK " ~ " <br />COMPANY ° ` <br />., <br />June 16, ?004 <br />Nlr. Harry Posey <br />Senior Reclamation Specialist <br />Colorado Division of Minerals and Geology <br />1313 Sherman Street, Room 215 <br />Denver, CO 80203 <br />Re: M-81-148 <br />Chiefrain South Mine, 7efferson County, Colorado <br />_ . Dear Nlr._Posey,~ . ___ <br /> <br />JUL 0 9 2004 <br />Division of Minorels & $Y <br />Robinson Brick Company is providing notice of intent to backfill inert structural fill, generated <br />outside of the permit azea, at the subject mine. <br />"Che fill material will be derived from the stone cutting operation at our Denver building stone <br />sales facility. Specifically, this material consists of cut pieces of natural building stone, with no <br />mortar or adhesives. The stone pieces are irregular-shaped and generally no lazger than twelve <br />inches in any dimension. An affidavit is attached certifying that the stone is inert and "clean". <br />We anticipate placing approximately 80 tons per week of this material at the south end of the <br />existing mine-pit. The material will be placed at the mine site starting on or about September 20, <br />2004 and continue for a period of approximately five years. Rock material will be end-dumped <br />along the side of the mine pit. The rock material will subsequently be placed and compacted with <br />the use of heavyYequipment. Following placement, the material will be covered with, at least, 18 <br />inches of material derived from the permit area. The thickness of applied topsoil will be <br />consistent with the site reclamation plan. The stone pieces aze relatively uniform in size and non- <br />compressible, and therefore, post-placement settling of the material will not likely occur. <br />Placement of the stone material will assist in site reclamation by providing additional fill material <br />as replacement for removed materials. "l;he stone material will not impact surface water runoff <br />quality, because the material does not contain contaminants, and local area storm water runoff is <br />diverted away from the mine disturbed area. Also, the stone material will not impact <br />groundwater quality because it is native rock material and contains no contaminants. Further, the <br />material will not be placed below the saturated zone. <br />1 can be reached at 303-783-3061 should you have any questions. <br />Sincerely, <br />Robinson Brick Company <br />J <br />c <br />/ ! ~ <br />Grego .Knell, C.P.G., C.H.M.M. <br />Environmental Compliance Coordinator <br />1845 West Dartmouth Avenue Denver, Colorado 80110-1308 <br />gales (303) 783-3000 Toll Free (800) 477-9002 Fax {303) 781-1818 <br />Web-site: www.robinsonbrick.com <br />