Laserfiche WebLink
Greg Lewicki And Associates, PLLC <br />337.5 West Pout ers Circle <br />June 5, 2017 <br />Littleton. Co 80 12 3 <br />Michael Cunningham <br />Colorado Division of Reclamation, Mining, and Safety <br />1313 Sherman St, Room 215 <br />Denver, CO 80203 <br />RECEIVED <br />JUN 13 2017 <br />DIVISION OF RECLAMI MON <br />MIN: NG & S'AFETY <br />RE: Detroit City Mine; DRMS File No. M-2017-003; Adequacy Response 3 <br />Dear Mr. Cunningham <br />Colorado Calumet Co, Inc. has assembled the following responses to the adequacy questions <br />posed in the Division's June 5h letter. Each of the items has been addressed in line, with revised <br />permit components, such as maps, listed in a table at the end of the letter. <br />The Applicant has provided a commitment to conduct geochemical testing of the waste <br />rock. However, the Applicant has not provided a proposed timeline for conducting and <br />reporting the results of the geochemical testing. In addition, the Applicant has not <br />provided a sampling plan for the geochemical testing. Please submit a sampling plan <br />and a proposed timeline for conducting and reporting the results of the geochemical <br />testing. Waste rock may not be placed on the WRL until such time as the Division <br />determines the waste rock is not toxic or acid-forming. <br />Waste rock will be sampled at four points in mine development: <br />1. First blast deep enough in to be past weathered native rock. Estimated to be roughly 70 <br />feet in. <br />2. Two hundred feet inby. <br />3. Three hundred feet inby. <br />4. Four hundred plus feet inby, at the point where the stopes will be developed. <br />Roughly one gallon of material will be collected at each interval, and then shipped to a <br />laboratory for analysis. The results of the analysis will be presented to the Division within 30 <br />days. <br />2. The revised Map C-2 shows a topsoil windrow located above the WRL which is outside <br />of the proposed permit boundary. Please provide a revised Map C-2 which shows that <br />all topsoil windrows will be located within the proposed permit boundary. <br />See the revised Map C-2. <br />Detroit City Mine <br />