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February 13,2020 C-1981-019/Colowyo Coal Mine ZTT <br /> w <br /> s + <br /> -�. -- - <br /> South Taylor Pit dragline operation. <br /> EXCESS SPOIL and DEVELOPMENT WASTE—Rule 4.09 <br /> Placement; Drainage Control; Surface Stabilization: <br /> The West Taylor Fill was inspected. The fill remains stable with no issues observed. <br /> The Collom Temporary Spoil Pile was inspected.The spoil pile continues being constructed in higher lifts. Spoil <br /> was being staged in preparation of haulage within the Collom Pit at the time of the inspection. Discussions with <br /> Colowyo Mine representatives stated that the spoil pile is currently at approximate 9 - 9.5 million cy. of material. <br /> The fill was stable and no issues were observed. Colowyo is approved for 13.5 million cy or the Collom <br /> Temporary Spoil Pile as shown in Exhibit 13C. <br /> Number of Partial Inspection this Fiscal Year: 8 <br /> Number of Complete Inspections this Fiscal Year: 2 <br /> Page 3 of 7 <br />