INSPEC24562 - Laserfiche WebLink

Home Browse Search

Colowyo C-1981-019 8 January 2007 Pg 3/9 ~-~ Hydrologic Balance (cont.): -The West Pit Pond (NPDES 008A) contained a small pool of water and was not discharging at the time of the inspection. There was also a small pool of water in the presettling sump at the inlet of the pond. The pond embankment was well vegetated and appeared to be stable at the time of the inspection. No erosional problems noted on the embankment at the time of the inspection. The emergency spillway is an open, trapezoidal riprapped channel. The spillway was stable and well maintained at the time of the inspection. -The East Taylor Pond (NPDES O1 OA) contained a small pool of water at the bottom and was not discharging at the time of the inspection. The pond embankment was well vegetated and appeared to be stable at the time of the inspection. No erosional problems noted on the embankment at the time of the inspection. The emergency spillway is an open, trapezoidal riprapped channel. The spillway was stable and well maintained at the time of the inspection. The water that is being pumped from the Section 4 area of the West Pit is being pumped into the riprapped spillway of the East Taylor Pond. The diffuser appears to be working very well as there were no erosional problems noted in the spillway at the time of the inspection. See the pictures following this inspection report regarding the pumping. -The Rail Loop Pond (NPDES QObA) contained water approximately three feet below the spillway and was not discharging at the time of the inspection. The pond embankment was well vegetated and appeared to be stable at the time of the inspection. No erosional problems noted on the embankment at the time of the inspection. The emergency spillway is an open, trapezoidal riprapped channel. The spillway was stable and well maintained at the time of the inspection. There are two large piles of sediment/coal fines at the inlet of the pond from the cleaning of the train tunnel. -The Stoker Siding Pond (NPDES 005A) contained water approximately four feet below the discharge pipe and was discharging an immeasurable trickle through the weep hole at the time of the inspection. The pond embankment was well vegetated and appeared to be stable at the time of the inspection. No erosional problems noted on the embankment at the time of the inspection. The emergency spillway is an open, trapezoidal riprapped channel. The spillway was stable and well maintained at the time of the inspection. This pond was not cleaned this year. -The Prospect Pond (NPDES 007A) contained water approximately four feet below the discharge pipe and was not discharging at the time of the inspection. The pond embankment was well vegetated and appeared to be stable at the time of the inspection. No erosional problems noted on the embankment at the time of the inspection. The emergency spillway is an open, trapezoidal riprapped channel. The spillway was stable and well maintained at the time of the inspection.