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COLORADO <br /> \/ Division of Reclamation, <br /> ® Mining and Safety <br /> Department of Natural Resources <br /> Apri126,2022 <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 Response <br /> Dear Mr. Tennyson: <br /> The Colorado Division of Reclamation,Mining and Safety(the Division)has reviewed Colowyo's <br /> response dated May 5,2022 to the Division's 2021 ARR review. The following details the previous <br /> comments from both the Division and Colowyo as well as any additional comments: <br /> 1. Division: The sum of the cumulative total for Acreage in Active Mining Areas,Acres Backfilled <br /> and Graded, and Totals for Acreage in Long-term Facilities does not match the Acres Disturbed. <br /> The sum of these acres must match the cumulative total for Acres Disturbed and currently there is <br /> a discrepancy of 97.4 acres. The four reported numbers need to be updated to accurately report <br /> and reflect the cumulative totals in the 2021 ARR Report Form. Please see Figure I at the end of <br /> this document for additional clarification. <br /> Colowyo: Given the different categories of acreages reported on the ARR form, the Division's <br /> request to ensure these acreages match the total disturbed acreages is not achievable. The <br /> categories on the form do not include all ground disturbances that occur at a mine site. For <br /> example, there are areas that are considered disturbance and are reflected in the total <br /> disturbance acres, but those acres not backfilled and graded, are not within the active mining <br /> areas, nor part of the long-term facilities. If the Division requires all the different categories of <br /> ground disturbances to match the total disturbed acres, then the ARR form needs to be revised to <br /> reflect each type of ground disturbance necessary to report the appropriate acreages. <br /> Any disturbed acreage that is outside of the categories of"Acreage in Active Mining Areas","Acres <br /> Backfilled and Graded",and "Permanent Facilities" still need to be reported within the ARR form to <br /> reflect what the reported Cumulative Total for Acres Disturbed is. All additional acreages that don't meet <br /> the criteria of the previously mentioned categories need to be reflected in"Non-Permanent Facilities". <br /> The total of"Acreage in Active Mining Areas"plus"Acreage in Long-term Facilities"(which includes <br /> permanent and non-permanent) should equal what is reported in"Acres Disturbed".Please provide the <br /> Division with an updated 2021 ARR form that reports the additional acreages that have been disturbed but <br /> not backfilled and graded or within active mining acres in the"Non-Permanent Facilities"row. <br /> 2. Division:Based on the Division's Findings Documents for all approved bond release <br /> applications (SL-1 through SL-20), the reported acreages in the 2021 ARR Report Form for <br /> Phase I, Phase II and Phase III Bond Releases appear incorrect. Please update the acreages for <br /> Bond Releases to report all acreages released for their associated phases for the entire Colowyo <br /> flF'�010 <br /> I n O <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 * JR76�` <br />