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COLORADO <br /> \/ Division of Reclamation, <br /> ® Mining and Safety <br /> Department of Natural Resources <br /> April 26,2022 <br /> Tony Tennyson <br /> Colowyo Coal Company L.P. <br /> 5731 State Highway 13 <br /> Meeker,CO 81641 <br /> Re: Colowyo Coal Mine(Permit No. C-1981-019) <br /> 2021 Annual Reclamation Report(ARR)Review <br /> Dear Mr.Tennyson: <br /> The Colorado Division of Reclamation,Mining and Safety(the Division)has reviewed the 2021 ARR for <br /> the Colowyo Mine (Colowyo)in the context of Rule 2.04.13 (Regulations of the Colorado Mined Land <br /> Reclamation Board for Coal Mining),Colowyo's approved PAP and previous Colowyo ARRs. The <br /> Division has the following comments: <br /> When reviewing the 2021 ARR Report Form(Figure 2-1 in Colowyo 2021 ARR), there appears to be <br /> some discrepancies in the acreages reported. <br /> 1. The sum of the cumulative total for Acreage in Active Mining Areas,Acres Backfilled and <br /> Graded, and Totals for Acreage in Long-term Facilities does not match the Acres Disturbed. The <br /> sum of these acres must match the cumulative total for Acres Disturbed and currently there is a <br /> discrepancy of 97.4 acres. The four reported numbers need to be updated to accurately report and <br /> reflect the cumulative totals in the 2021 ARR Report Form. Please see Figure 1 at the end of this <br /> document for additional clarification. <br /> 2. Based on the Division's Findings Documents for all approved bond release applications (SL-1 <br /> through SL-20),the reported acreages in the 2021 ARR Report Form for Phase I,Phase II and <br /> Phase III Bond Releases appear incorrect. Please update the acreages for Bond Releases to report <br /> all acreages released for their associated phases for the entire Colowyo life of mine. Please see <br /> Table 1 at the end of this document for the Division's documented acreages for approved Phase I, <br /> Phase II and Phase III Bond Releases. <br /> If you have any questions,feel free to contact me. <br /> Sincerely, <br /> Zach Trujillo <br /> Environmental Protection Specialist <br /> flF'�010 <br /> 1313 Sherman Street, Room 215, Denver, CO 80203 P 303.866.3567 F 303.832.8106 http://mining.state.co.us <br /> Jared S. Polis, Governor I Dan Gibbs, Executive Director I Virginia Brannon, Director * 1876 * <br />