2025-02-05_INSPECTION - C1981018 (5)

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January 28, 2025 C-1981-018/Deserado Mine TJ1 Number of Partial Inspection this Fiscal Year: 6 Number of Complete Inspections this Fiscal Year: 2 Page 3 of 10 The RS-1 Sump and the RR-1 Pond are located at the south side of the Rail Loadout. Both the pond and sump had minor amounts of snow at the time of the inspection. There were no indications of erosion. The embankments seem stable with no erosional features noted. (Photo 4) Refuse Disposal Area RP-A has one sediment pond located at its eastern end. The RP-A Pond was snow covered during the inspection. The embankment was stable and no erosional features were noted. (Photo 5) Pond RP-1 is located at the base of the reclaimed RP-1 Refuse Pile. The pond was snow covered during the inspection. The embankments of the pond were stable with no indications of erosion observed. There was no debris on the trash rack over the pond’s outlet. (Photo 6) Two ponds are located at the northern base of Refuse Pile RP-2/3/4. The RP -2/3 Pond (Photo 6) is located on the pile’s northeast corner. The Pond consists of three cells. Upper cells appear frozen and snow covered while the lower pond was dry. There were no erosional features identified. The channels above the ponds were partially snow covered, but clear of debris. No erosional features were noted on the embankments of the conveyance ditches. The trash rack was clear of debris. The RP-4 Pond is located at the northwest base of the pile. The pond was snow covered during the inspection. The embankments were stable and no erosional concerns were identified. The outlet for the RP-4 Pond is capped with a trash rack. The outlet was clear of debris. Pond RP-5 is located at the northern base of the RP-5a Refuse Pile. The pond was snow covered at the time of the inspection. The embankments of the pond appear stable, and no indications of erosion were observed. The outlet was clear of obstructions. (Photo 7) PROCESSING WASTE/COAL MINE WASTE PILES – Rule 4.10 and 4.11 Drainage Control; Surface Stabilization; Placement: The RP-A Refuse Pile was snow covered during the inspection. Refuse on the top of the RP-A Refuse Pile appears to have been spread and compacted. The pile was mostly snow covered during the inspection. The pile is stable and no erosional features were noted. (Photo 5) During the inspection refuse material was being placed on the RP-5 Refuse Pile in windrows. The pile was stable. Erosion on the slopes of the pile has been noted in previous Division inspection reports. The rills have not significantly enlarged since the last inspection. (Photo 7) Refuse on the top of the RP-2/3/4 Pile has been spread and compacted. The pile was snow covered on the northern embankment and stable during the inspection. Erosion on the slopes of the pile has been noted in previous Division reports. Similar to the RP-5 Refuse Pile, these rills have not significantly enlarged since the last inspection. There were no signs of displacement or slumping on the refuse pile. (Photo 7) ROADS – Rule 4.03 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 (6)/4.03.2(5) and (6), Reclamation 4.03.1(7)/4.03.2(7): The haul road was in good condition during the inspection. The road was stable and there were no erosional features identified. Access roads throughout the rest of the mine are mostly snow covered. CR-65 also