2024-10-02_INSPECTION - C1981018

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September 19, 2024 C-1981-018/Deserado Mine TJ1 Number of Partial Inspection this Fiscal Year: 2 Number of Complete Inspections this Fiscal Year: 1 Page 4 of 14 Pond RP-1 is located at the base of the reclaimed RP-1 Refuse Pile. The pond was dry at the time of the inspection. The embankments of the pond were stable with no indications of erosion observed. There were no obstructions in the outlet - the trash rack over the pond’s outlet was clean. Two ponds are located at the northern base of Refuse Pile RP-2/3/4. The RP -2/3 Pond is located on the pile’s northeast corner. The Pond consists of three cells – the upper cells were holding water at the time of the inspection (Photo 7). The channels above the ponds appear 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 dry during the inspection. Animal burrows were seen on the embankment of the pond and were filled during the inspection to prevent instability (Photo 8). 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 dry at the time of the inspection. The embankments of the ponds were vegetated and seemed stable. No indications of erosion were observed. The outlet was clear of obstructions. The Raw Water Lagoon is in the southeastern portion of the permit boundary off CR-65 and adjacent to the White River. There was no evidence of erosion or instability along pond embankments. The pump was free of obstructions/debris time of the inspection. Culverts are located around the Nitrogen Plant to divert water away from the pad and roadway. The culverts are free of obstruction and able to convey water properly (Photo 9). PROCESSING WASTE/COAL MINE WASTE PILES – Rule 4.10 and 4.11 Drainage Control; Surface Stabilization; Placement: The RP-2/3/4 and RP-5a Refuse Piles were observed during the inspection. The piles were observed to be stable with minor localized erosion. The erosion was identified on the slopes of the refuse piles in the form of rills . The size and depth of the rills are not thought to compromise the stability of the refuse piles (Photo 10). All material transported through these rills ends up in the perimeter ditches and subsequently the refuse pile ponds. The refuse pile ditches were clear of blockages and were dry. Minor amounts of volunteer vegetation were growing on the slopes of the stacks. 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 clear and well maintained. There we no sections with ruts or other road damage. The road surface was treated for dust, and no noticeable amount of dust was generated by haul trucks. The ditches that parallel the roads appear to be stable and able to convey water. CR-65 had no surface cracks or other indications of road damage due to subsidence. County crews were tarring cracks in the road that are associated with normal road wear. Access roads throughout the mine site were traversed during the inspection. Roads were stable and no erosional features were identified. RECLAMATION SUCCESS - Rule 4.15, Rule 3: The RP-1 refuse pile has been reclaimed for several years. Vegetation is well established and protects the