_INSPECTION - C1981035 (5) - Laserfiche WebLink

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October 2, 2012 C-1981-035/King Coal Mine MLT Surface Water Monitoring 4.05.13; Drainage—Acid and Toxic Materials 4.05.8; Impoundments 4.05.6, 4.05.9; Stream Buffer Zones 4.05.18: Ground conditions at the site continue to be extremely dry. The area received very little precipitation in the previous month. King II • Sediment had been excavated from the East and West Sedimentation Ponds the previous week. Mr. Bird said they would be replacing the rods in each pond shortly, which are used to monitor sediment and water levels. He said the spillways for the west pond have discharged only once, a number of years ago, when the mine experienced a significant storm event. • Primary and emergency spillways were clear for both ponds, and appeared to be in good working order. The outlet end of the PVC pipe connecting the two ponds had been cleared since the last inspection. The end had been broken off, and Mr. Bird said it would be repaired. • Vegetation on the pond inslopes and berm tops is sparse this year, due to the dry conditions. King II • The King 11 pond has not accumulated a great deal of sediment since its construction. The sediment has not reached the level which requires its removal. Sediment in the pond appears to have a high component of coal fines. This pond has never discharged through either spillway. The pond floor is well vegetated with seeded grasses. • The inlet culverts and the north corners of the pond were both clear of debris and sediment. • The operator has recently improved the natural channel downstream of the confluence of the pond outfall and the east and west clear water diversion ditches. The ditch previously did not have positive flow away from the discharge area. A shallow"V" ditch was developed, and a series of straw wattles were placed perpendicular to the flow line for added stabilization. The gradient of the ditch was checked with an inclinometer, and was found to be 2.0% overall, from the pond culvert outlet to the end of the grading. Mr. Bird said the ditch would be seeded later this fall, when the weather is cooler. • BMP's for the Small Area Exemption at the entrance to King I have been recently repaired. Filter fabric has been erected on rod frames to filter the flow before it leaves the haul road surface. Number of Partial Inspection this Fiscal Year: 3 Number of Complete Inspections this Fiscal Year: 1 Page 3 of 4