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STATE OF COLORADO <br />DIVISION OF MINERALS AND GEOLOGY <br />Department of Natural Resources <br />1313 Sherman St, Room 215 C ~ I. <) IUD Q <br />Denver, Colorado 80203 DIVISION O F <br />Phone: (303) 866-3567 MINERAL S <br />FAX: (303) 832-8106 GEC' I. O G Y <br /> REC LANATION•NINING <br /> SAf ETY•SGIEN<E <br /> Bill Owens <br />January 10, 2005 c°vem°` <br /> Russell George <br /> Executive Director <br /> <br />Ron Thompson Ronald W. Cattany <br />Division Director <br />Peak Project Management Natural Resource Trustee <br />34115 County Road 20.8 <br />Trinidad CO 81082 <br />RE: 15~, 2"d, and 3`d Quarter 2004 <br />Discharge Monitoring Reports <br />Lorencito Coal Company, LLC, #C-96-084 <br />Dear Mr. Thompson: <br />The Division of Minerals and Geology (DMG) has reviewed the 1St 2"d and 3`d quarter <br />2004 Discharge Monitoring Reports (DMR) for the Lorencito Canyon mine, CDPS <br />permit CO-0045080. No new outfalls were constructed during the three quarters <br />reviewed. The mine has ceased mining activities and is in the process of reclaiming all <br />areas that report to sediment treatment ponds at the site. Submittal of the reports <br />satisfies the requirement of Rule 4.05.13(2)(a)(iii)(A). File review indicates no response <br />to previous DMG review letters. Please respond to previous review letters from the <br />DMG. <br />No discharge was reported during the 1St or 2"d quarters of 2004, which is consistent <br />with DMG field inspection. Discharge was reported in the 3rd quarter from multiple <br />outfalls. Rain gauge data indicates the site experienced two storm events within a 24- <br />hour period that when combined, exceeded the 100-year, 24-hour storm of 4.20 inches. <br />Please report the date and time that the pond outtalls visited and when pond effluent <br />samples were taken subsequent to the end of the storm event(s). <br />We have no further questions at this time. Please respond as necessary within thirty <br />(30} days of receipt of this letter. Thank you for your diligence in pursuing your <br />monitoring and reporting as required. <br />Sint ely, <br />K A. Gorham <br />Environmental Protection Specialist II <br />Office of Office of Colorado <br />Mined Land Reclamation Active and Inactive Mines Geological Survey <br />