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October 6, 2010 C-1981-035/King Coal Mine TAK <br />EXCESS SPOIL and DEVELOPMENT WASTE - Rule 4.09 <br />Placement; Drainage Control; Surface Stabilization: <br />Several piles of coal waste rock were on the top of the waste pile, awaiting incorporation into lifts. The top <br />surface of the pile was dry and gently slopes away from the face of the pile, as designed. The face of the pile was <br />seeded and mulched in fall of 2009, but little seed germination was evident by fall 2010. No problems were <br />apparent on the pile. <br />HYDROLOGIC BALANCE -Rule 4.05 <br />Drainage Control 4.05.1,4.05.2,4.05.3; Siltation Structures 4.05.5, 4.05.6; Discharge Structures 4.05.7,4.05.10; <br />Diversions 4.05.4; Effluent Limits 4.05.2; Ground Water Monitoring 4.05.13; Surface Water Monitoring 4.05.13; <br />Drainage - Acid and Toxic Materials 4.05.8; Impoundments 4.05.6, 4.05.9; Stream Buffer Zones 4.05.18: <br />King I Ponds - Both ponds contained small pools of water and the ponds appeared to have adequate storage <br />capacity. The inslopes of both ponds appeared stable. The outslope of the embankment of the west pond has been <br />mulched and appeared structurally and erosionally stable. (The east pond is fully incised and does not have an <br />embankment.) The pipe and culvert that serve as primary spillways of the ponds appeared to be clear. The open <br />channel emergency spillways of both ponds appeared erosionally stable. Both ponds had graduated staffs in place <br />for surveying sediment level. <br />King H Pond - The pond was dry and appeared to have adequate storage capacity. The inslopes of the pond <br />appeared stable. The outslope of the embankment has been mulched and appeared stable. The primary and <br />emergency spillway culverts appeared to be in good shape. A graduated staff was in place for surveying sediment <br />level. <br />King II Pond inlet and outlet culverts - The outlet end of the 24-inch diameter culvert that discharges into the pond <br />from the pond's northeast comer (culvert C-7) was approximately half full of sediment. The operator's <br />representative committed to cleaning out the sediment from the culvert and immediately below the culvert outlet <br />prior to the next DRMS monthly inspection. The culvert conveys runoff to the pond from approximately 8 acres of <br />the surface facilities area in Cochrane Canyon. Appendix 11(3) in the permit application shows the culvert is <br />designed to convey 10-year storm peak flow of 27.8 cfs, approximately twice the modelled 12.88 cfs peak flow <br />for the culvert's drainage area; therefore, the culvert appeared capable of functioning properly, although <br />maintenance is definitely needed. The two 24-inch diameter culverts that are the primary and emergency <br />spillways of the sediment control pond (culvert C-3) had sediment accumulation in their outlet ends. The <br />operator's representative committed to cleaning out this sediment before the next DRMS monthly inspection. The <br />pond has never discharged and the sediment accumulation appeared to have resulted from nearby surface flow, <br />downstream from the pond. <br />Number of Partial Inspection this Fiscal Year: 2 <br />Number of Complete Inspections this Fiscal Year: 2 <br />Page 3 of 16