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GCC GCC Energy, LLC <br /> Telephone 970 385 4528 6473 County Road 120 <br /> Energy "Safety as a Value" Facsimile 970 385 4638 Hesperus,CO 81326 <br /> September 10, 2019 <br /> State of Colorado <br /> Division of Reclamation, Mining & Safety N0!1'1'�_, s',"MAIC] <br /> 1313 Sherman St., Room 215 r — r% <br /> Denver, CO 80203 �-, C <br /> ECE <br /> Attn: Janet Binns Specialist p Environmental Protection S � .r' i ��C D <br /> SEP 16 <br /> Re: GCC Energy, LLC, King II Mine DIVISIU.: r;=-"!$MATION X019 <br /> CDRMS Permit # C-1981-035 MINING AND SAFETY DIVISION OF RECLAMATION <br /> Technical Revision No. 27 (TR-27) MINING AND SAFETY <br /> • Reconfigure Parts of the Existing, Permitted Refuse Pile <br /> Second Adequacy Review Response <br /> Ms. Binns: <br /> In repsonse to the Division's letter of July 17, 2019, please find responses below to each item <br /> of concern (shown in italics) as listed in your letter. GCC Energy responses are show in bold <br /> test. <br /> Section 2.05 <br /> 1. DRMS July 17, 2019:No additional response required. <br /> 2. DRMS July 17, 201 9:In the discussion offill material(Section 2.05.4), GCC has added volume <br /> calculations. The Division recommends further discussion on the source(or sources)for this material. <br /> Even if GCC chooses to not put this information in the PAP, it will be necessaryfor the Division to produce <br /> an accurate Reclamation Cost Estimate. <br /> GCCE September 10, 2019: A further discussion of the sources of fill material <br /> has been added to Section 2.05.4 page 5, and new Section 2.05.4 page 5A is <br /> also included. <br /> 3. DRMS July 17, 2019:No additional response required. <br /> Appendix 10 <br /> 4. DRMS July 17, 2019:No additional response required. <br /> S. DRMS July 17, 2019:No additional response required. <br /> 6. DRMS July 17, 2019: The Division has the following follow-up comments. <br /> a. In the adequacy response, GCC states that the currently proposed underdrain sizing is based upon <br /> the original refuse pile underdrain analysis in Appendix 10(1)and the July 2014 Trautner Geotech <br /> report. This Trautner report needs to be submitted as part of TR-27. Also, as applicable,please <br /> edit the Trautner report(an addendum would suffice)to agree with the alternative design for TR- <br /> 27. <br />