2019-04-26_INSPECTION - C1981018

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April 9, 2019 C-1981-018/Deserado Mine CCW Number of Partial Inspection this Fiscal Year: 6 Number of Complete Inspections this Fiscal Year: 4 Page 7 of 13 The rail loop sump was dry. The embankments were well vegetated and stable. There were no indications of erosion. The spillway was clear of debris. The RR-1 pond was muddy at the bottom during the inspection. The embankments of the pond were stable with no erosion. The vegetation on the embankment was well-established. The ditch on the southern side of the rail loop has become filled with sediment. The area near the culvert inlet to the sump was plugged by a small pile of sediment. The section of the ditch that continues to the RR -1 pond has also requires maintenance. The Division recommends cleaning the entire ditch. Photo 13: the RS-1 Sump. Photo 14: The RR-1 Pond Two ponds, the SS-1 and the SS-2, are located to the north of the Slot Storage Facilities. The SS-1 pond was holding water during the inspection. There was no discharge occurring. The pond’s embankments were well vegetated and stable. The inlet to the pond is a CMP culvert that is beneath the access road to the conveyor. The inlet and outlet of the culvert was approximately 1/2 full of sediment. Please clear the inlet and outlet of the culvert. The SS -2 Pond was dry at the time of the inspection. The embankments were stable and well vegetated. No evidence of erosion was observed on the embankments. The outlet for the pond was clear of debris and able to function as designed. The southwest inlet to the pond had head -cut into the ditch. Please return the inlet of the pond to original specifications. An eye will be kept on this area to ensure that the inlet does not need to be armored in the future. There are three cells in the B-Seam Dewatering System #2, an upper cell, a middle cell and a lower cell. The pump was not running during the inspection. The upper c ell had water impounded in it. There was no discharge to the middle cell. The embankments were well vegetated and stable. The embankment was noted to be damp. After conversing with the operator, the damp soil on the embankment was due to the hose for the pump becoming detached. Water from the pump for a short time was spraying on the embankment. No concerns with erosion were identified. The middle cell had water impounded in it. There was no discharge to the lower cell. The embankment was stable and there were no indications of erosion. The embankment’s vegetation was becoming well-established. The lower cell of the system was dry. The embankment was stable and becoming well vegetated. There were no indications of erosion.