_INSPECTION - C1981019 (37) - Laserfiche WebLink

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=r April 26,2011 C-1981-019/Colowyo Coal Mine JHB FISH and WILDLIFE—Rule 4.18: Numerous waterfowl and wildlife were observed throughout the mine site. A medium sized(20-30 head) herd of elk were observed in the East Taylor drainage.Pronghorn were observed along the main paved haul road. American Widgeon&Cinnamon Teal pairs were noted in the West Pit pond. Mallards were noted throughout the mine site. 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; Impoundments 4.05.6,4.05.9; Stream Buffer Zones 4.05.18: Runoff was actively flowing throughout the mine site. No problems with clogged culverts were identified. Ditches were flowing well. The inspector was unable to observe disturbed area ditches at South Taylor pit due to Haul Road closures and inaccessible conditions. Even foot travel was limited by the wet muddy conditions. Some areas still retain snowdrifts,but mostly muddy conditions were pervasive. West Pit pond was accessed via the East Taylor road. The pond access road was very muddy and slick. Drainage off the main paved haul road flows onto the East Taylor access road. West Pit pond was not discharging but was holding a pool of water. No problems were noted with the pond inlet, sides or embankment. The road to East Taylor pond was impassible due to muddy conditions. Ponds accessed include Rail loop pond,not discharging. Stoker pond; discharging 0.02 on staff gauge discharge was clear. Gossard pond was discharging 0.05 on 8"flume. Section 28 pond was accessed. Pond was holding a pool of water too the bottom on the primary discharge. The water elevation was well below the weep holes but the primary discharge was leaking a trickle of water. CCC has already identified this small leak. The Division identifies this leak as a maintenance item. The outslope of Section 28 pond is still thin on vegetative cover. Evidence of fines eroding off the embankment outslope was noted by sediment fan at the bottom of the slope. Additional stabilization seed may be necessary to stabilize this outslope. Discharge from this pond flow cross country over existing vegetation prior to entering the defined drainage. Prospect pond was discharging 0.04 on the staff gauge on the 30"flume. The discharge was slightly cloudy. No maintenance concerns were noted with the Prospect pond. The culvert under State Highway 13 at Prospect pond appears to be 24"CMP. Gulch A pond was discharging 0.1 on staff gauge on the 12"flume. Discharge was very slightly cloudy. No problems were noted with this pond. CCC representative said that animal burrows had been filled in. None were observed during this inspection. Streeter Pond was discharging 0.1 on staff gauge on the 12"flume. No problems were identified with Streeter pond. Work Area Pond was discharging. A small leak on the flume was still visible at the work area pond. Number of Partial Inspection this Fiscal Year: 8 Number of Complete Inspections this Fiscal Year: 3 Page 3 of 6