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March 15,2023 C-1981-019/Colowyo Coal Mine ZTT <br /> GENERAL MINE PLAN COMPLIANCE: <br /> The only mining activity occurring during the inspection was highwall mining. The highwall miner is currently <br /> operating in the South Taylor Pit. <br /> Backfilling was occurring in the Little Collom Gulch to create a bench for future highwall mining activities. <br /> Backfill was being taken from the previous bench along the eastern side of the gulch and being moved to the west <br /> side. The bench will be used to reach upper coal seams above the current elevation of the gulch. <br /> J <br /> Highwall mining in the South Taylor Pit. Bench development in Little Collom Gulch. <br /> ROADS—Rule 4.03 <br /> Construction 4.03.1(3)/4.03.2(3),Drainage 4.03.1(4)/4.03.2(4), Surfacing and Maintenance4.03.1(5) and <br /> (6)/4.03.2(5) and(6),Reclamation 4.03.1(7)/4.03.2(7): <br /> Road maintenance and snow removal operations were observed on site. Snow berms and drifts were being cleared <br /> by truck and loader operations. <br /> Maintenance occurred to the outslope of the embankment of the haul road near the Gossard Loadout. Erosion from <br /> runoff through a culvert caused some erosion and maintenance was conducted to fix the erosion. Silt fences were <br /> installed below the maintenance area as best management practice to prevent future erosion until the outslope <br /> stabilizes with vegetation. <br /> Number of Partial Inspection this Fiscal Year: 6 <br /> Number of Complete Inspections this Fiscal Year: 3 <br /> Page 5 of 7 <br />