2014-12-18_INSPECTION - C1981035

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December 11, 2014 C- 1981 - 035 /King Coal Mine MLT • All oil containers were protected under the roof of the 3 -sided shed. • The stockpile at Stack Tube 91 had grown in size. Mr. McFarland explained that the screen tower had been out of service for two days, which allowed coal to build up again. • Stack Tube #2 also had a sizable stockpile of coal, but there was a steady stream of haul trucks being loaded at the scales throughout the inspection, and the volume of stockpiled material was decreasing. • At King I, there is a temporary elevated tank for diesel fuel. The tank is standing in a round stock tank, which provides secondary containment. There was approximately three inches of water on the tank floor, with no oil sheen visible. HYDROLOGIC BALANCE - Rule 4.05 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; Diversions 4.05.4; Effluent Limits 4.05.2; Ground Water Monitoring 4.05.13; 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: • The West Clearwater Ditch was in good condition throughout most of its length. Upstream of 24" ADS culvert, however, Russian thistle skeletons from the water tank bench have blown into the ditch and have the potential to clog the pipe. This ditch segment needs to be cleared of weeds and woody debris. • The earthen berm surrounding the material storage area north of the water tank bench needs to be extended southward to prevent any runoff from the disturbed area from getting into the West Clearwater Ditch. • We identified specific culverts and ditches that were in need of immediate maintenance (nomenclature from Map King II- 007A): • the inlet to Culvert C 15, south of the Rock Dust Silo, was partially clogged with sediment; • a rock had fallen over the inlet to Culvert C 14, beneath the Belt Portal Access Road; • the ditch downstream of Culvert(s) C3 had been cleared, but there was still some sediment within the pipe outlets. • Runoff from the Haul Road appeared to have the potential of flowing beneath a section of concrete barrier and into the West Clearwater Ditch. This segment of road was in need of minor regrading. • Crushed limestone for use underground is stockpiled alongside the Haul Road. This material needs to be entirely contained behind silt fence in order to prevent it from washing onto undisturbed ground or into the West Clearwater Ditch. • The East Clearwater Ditch was clean and in good repair throughout its length. • Subsequent to the inspection, the Division reviewed precipitation data reported from a nearby monitoring station (CO- LP -16). For the 4th quarter, to date, the following daily totals have been reported: Oct.: 9th - 0.15 10th - 0.36 "; 11th - 0.37 20th - 0.61 21st - 0.02 23rd - 0.03" Nov.: 2nd - 0.13 "; 3rd - 0.16" Dec.: 4th - 0.07" 5th - 0.26 "; 14th - 0.40" Number of Partial Inspection this Fiscal Year: 5 Number of Complete Inspections this Fiscal Year: 2 Page 3 of 6