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September 15,2022 C-1981-018/Deserado Mine CAB <br /> impact the volume of water the ditch could convey. Please clean the vegetation from the ditch to return the ditch <br /> to restore the maximum flow designs. <br /> There are two ponds located to the northwest and northeast of the Slot Storage facility. The SS-2 pond is located <br /> to the northwest(Photo 2). The pond was damp during the inspection. There was no discharge from the pond. <br /> The embankment was stable and vegetated. There were no erosional features observed. The SS-1 pond is located <br /> to the northeast of the Slot Storage. The pond was holding a small amount of water. The level of water in the <br /> pond was not high enough to reach the spillway. The embankments for the pond were vegetated and stable. There <br /> were no indications of erosional features. <br /> The B Seam Dewatering System No. 2 was inactive at the time of the inspection. The upper cell was damp (Photo <br /> 3). There was no discharge to the middle cell. The embankment for the upper cell was stable with vegetative <br /> cover. There were no erosional features noted. The middle cell was holding a small amount of water. The level <br /> of water in the pond was too low to reach the spillway. The embankment of the pond was vegetated and stable. <br /> There were no erosional concerns identified. <br /> The RP-1 pond is located at the base of the RP-1 refuse pile. The pond was muddy at the bottom. There was no <br /> indications of erosional features on the embankment. The trash rack on the outlet was clear of debris. The pond's <br /> embankment was stable with vegetative cover. <br /> Two ponds are located at the northern base of the RP-2/3/4 refuse pile. The RP-2/3 pond is located at the <br /> northeast corner of the base of the pile. The pond consists of three cells. The west and main cells were muddy. <br /> The east cell was holding a small amount of water in it. There was no discharge from the east cell into the main <br /> cell. The embankments for the RP-2/3 pond were observed to be stable with vegetative cover. There were no <br /> erosional features identified. The RP-4 pond is located at the northwestern base of the pile. The pond was muddy <br /> and damp during the inspection. The trash rack on the spillway was clear of debris. The pond's embankment was <br /> vegetated and stable. There were no erosional features seen. <br /> The RP-5 pond is located to the north of the base of the RP-5a refuse pile (Photo 4). The pond was damp and <br /> muddy. There were no obstructions on the primary spillway. The pond's embankment was stable and vegetated. <br /> No erosional concerns were identified. <br /> The Raw Water Lagoon was holding water during the inspection. The pond was full and discharging. The <br /> embankment for the pond had vegetative cover and was stable. There were no erosional features seen. <br /> PROCESSING WASTE/COAL MINE WASTE PILES—Rule 4.10 and 4.11 <br /> Drainage Control; Surface Stabilization; Placement: <br /> There are three active coal waste piles at the Deserado Mine. The RP-2/3/4(Photo 5),RP-5a(Photo 6) <br /> and RP-A piles. The RP-2/3/4 and RP-5a piles are located to the east of the intersection of the haul road and the <br /> conveyor corridor. The RP-2/3/4 pile had refuse material spread out on top of the pile. The slopes were stable <br /> with minor amounts of localized erosion. The erosion is in the form of rills. The rills are not large enough to <br /> affect the stability of the pile. The rills are included on a maintenance list to be completed this fall. Any material <br /> removed by the rills is transported in the RP-2/3/4 pile's ditches and end up settling out in the RP-2/3/4 and RP-4 <br /> ponds. Pond cleanings are placed back on the refuse piles. No off site impacts have occurred. Refuse material on <br /> the RP-5a pile has been spread out on top of the pile. The slopes of the pile are similar to those on RP-2/3/4. The <br /> Number of Partial Inspection this Fiscal Year: 2 <br /> Number of Complete Inspections this Fiscal Year: 0 <br /> Page 3 of 10 <br />