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November 13, 2019 C-1981-019/Colowyo Coal Mine ZTT <br />Inspection Topic Summary <br />NOTE: Y=Inspected N=Not Inspected R=Comments Noted V=Violation Issued NA=Not Applicable <br />N <br />- Air Resource Protection <br />Y <br />- Roads <br />R <br />- Availability of Records <br />Y <br />- Reclamation Success <br />R <br />- Backfill & Grading <br />Y <br />- Revegetation <br />N <br />- Excess Spoil and Dev. Waste <br />N <br />- Subsidence <br />N <br />- Explosives <br />N <br />- Slides and Other Damage <br />N <br />- Fish & Wildlife <br />Y <br />- Support Facilities On-site <br />R <br />- Hydrologic Balance <br />Y <br />- Signs and Markers <br />R <br />- Gen. Compliance With Mine Plan <br />N <br />- Support Facilities Not On-site <br />N - Other <br />N <br />- Special Categories Of Mining <br />N <br />- Processing Waste <br />R <br />- Topsoil <br />COMMENTS <br />This was a complete inspection of the Colowyo Mine conducted by Zach Trujillo of Colorado Division of <br />Reclamation, Mining and Safety (DBMS) on November 13, 2019. Angela Aalbers and Tom Fry representing <br />Colowyo Coal Company (Colowyo) accompained the inspection. The weather for inspection was clear with dry <br />ground conditions. Temperature during the inspection was around fifty degrees fahrenheit. <br />AVAILABILITY OF RECORDS —Rule 5.02.4(1): <br />All records are kept on site at the Colowyo Mine's office building. Please see the Division's Availability of <br />Records checklist at the end of this inspection report for more detailed information. <br />BACKFILL and GRADING — Rule 4.14 <br />Contemporaneous Reclamation 4.14.1; Approximate Original Contour 4.14.2; Highwall Elimination 4.14.1(2)(f); <br />Steep Slopes 4.14.2, 4.27; Handling of Acid and Toxic Materials 4.14.3; Stabilization of Rills and Gullies 4.14.6: <br />Contemporaneous backfilling continues in the South Taylor Pit. Spoil from the western end of the pit is being <br />moved by dragline and dump trucks to the east as mining progresses. <br />Active regrading work was occurring in the West Pit along the southwestern portion of the associated highwall. <br />Spoil from the South Taylor Pit was being transported to the West Pit for backfilling. <br />Number of Partial Inspection this Fiscal Year: 5 <br />Number of Complete Inspections this Fiscal Year: 2 <br />Page 2 of 8 <br />