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STATE OF COLORADO <br />DIVISION OF RECLAMATION, MINING AND SAFETY <br />Department of Natural Resources <br />1313 Sherman St., Room 215 <br />Denver, Colorado 80203 <br />Phone: (303) 866-3567 . <br />FAX: (303) 832-8106 <br />September 4, 2009 v- <br />r <br />Mr. Michael Hart <br />Hart Environmental <br />P.O. Box 1303 <br />Boulder, Colorado 80306 <br />COLORADO <br />D I V IS I ON OF <br />RECLAMATION <br />MINING <br />SAFETY <br />Bill Ritter, Jr. <br />Governor <br />Harris D. Sherman <br />Executive Director <br />Ronald W. Cattany <br />Division Director <br />Natural Resource Trustee <br />V111, <br />RE: Bromley Lakes Pit, DRMS File# M-1987-049, Amendment 02 Application, Adequacy <br />Review #5P <br />Dear Mr. Hart, <br />Exhibit C <br />1.) In regard to Item #2, the topography of the entire current affected area is hard to ascertain <br />from the maps that were submitted for this section. Please submit a map that displays the <br />topography of the entire current affected area with contour intervals of sufficient quality and <br />detail that the current direction and rate of slope can be ascertained, especially for all the <br />current pit excavations in Cell No. 2, 3 and Ready Mixed Pit No. 1 areas. <br />Exhibit D <br />2.) In regard to Item #6, during the site inspection Mr. Timmons pointed out several remaining <br />stockpiles of overburden and topsoil at various locations throughout the current mining <br />operation. Please display them on the Mining plan Map for Exhibit D. <br />3.) The mining setback displayed on the Mining Plan map for Exhibit D indicates that mining will <br />occur 65 feet from the east edge of Brighton Road. According to the response given for Item 32 <br />for Exhibit S, a mining setback formula of 3:1 will be used. Given this, if the average pit depth is <br />25 feet, the setback to a structure should be 75 feet. The mining setback line on the Exhibit D <br />and C maps will need to be corrected to correspond to the 3:1 formula based on the proposed <br />depth of mining. <br />Office of <br />Office of <br />Mined Land Reclamation Denver • Grand Junction • Durango Active and Inactive Mines