2023-04-07_INSPECTION - C1981018 (2)

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March 29, 2023 C-1981-018/Deserado Mine CCW Ditches throughout the main facilities are were observed to be functioning as designed,transporting runoff to the DP-1 pond. Some ditches have partly filled in with sediment. Please add cleaning the facilities/portals area ditches when ground conditions allow. The SS-1 pond and the SS-2 pond are located to the north of the Slot Storage facility. The SS-1 pond was holding water during the inspection. No discharge was observed. The discharge outlet was clear of debris. Embankments for the pond were partly covered with snow. There were no erosional concerns or indications of erosion observed. The SS-2 pond was covered with snow(Photo 1). The embankment was stable with no erosional concerns identified. There are a couple of culverts below access roads adjacent to the SS-1 pond. Both culverts are south of the SS-1 pond. The culverts were observed to be partly filled with sediment(Photo 2). Runoff was observed being conveyed to the SS-1 pond properly even with the excess sediment in the culverts and ditches. Please clean out the culverts and ditches of the excess sediment. The current ground conditions were too soft to complete these items. The operator has added the culverts to the list of items requiring maintenance when ground conditions allow. Water was observed to be impounded in the second cell of the B Seam Dewatering System No. 2 (Photo 3). The cell was frozen over and the embankments were covered with snow. The level of water and ice had not reached the primary discharge outlet. The embankment was stable and no erosional features were identified. The third cell of the system is not used. The cell was covered with snow and there was not any water observed to be impounded in the cell. The first cell was inaccessible during the inspection. All cells of the B Seam Dewatering System No. 1 were holding water. The first 4 cells were un frozen and the remaining cells were observed to be frozen over. The Discharge point at the Last Chance Pond could not be accessed. The Division was not able to determine if discharge from the system was occurring. The embankments of the cells were covered with snow. There were no observed indications of erosion or instability. The RP-2/3 pond was accessible during the inspection. The RP-2/3 pond is located at the northeastern base of the RP-2/3/4 refuse pile. There are three cells to the pond;the main cell, east cell and west cell. All three cells were observed to be holding a small amount of water in them. The level of water in the main cell was well below the primary discharge outlet. The trash rack over the discharge outlet was clear of debris. The embankments of the pond were covered with snow. No erosional features or indications of instability were observed. The Raw Water Lagoon is located in the southern portion of the permit area,north of the White River and adjacent to CR-65. The pond was holding water and frozen over during the inspection (Photo 4). The embankment was snow covered and stable. There were no erosional concerns identified. PROCESSING WASTE/COAL MINE WASTE PILES—Rule 4.10 and 4.11 Drainage Control; Surface Stabilization; Placement: The Deserado Mine has three active refuse disposal sites;the RP-2/3/4 pile, RP-5a pile and the RP-A pile. Refuse on the RP-2/3/4 and RP-5a piles had been places into windrows to allow for drying of the refuse material. The slopes of the RP-2/3/4 and RP-5a piles were covered with snow. There were no erosional features identified. No concerns of instability were seen. Refuse material was actively being placed and spread at the RP-A pile (Photo 5). The refuse material placed at the RP-A pile is continuing to fill out the base of the pile. The RP-A pile Number of Partial Inspection this Fiscal Year: 6 Number of Complete Inspections this Fiscal Year: 3 Page 3 of 11