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Colowyo C-1981-019 14 February 2007 Pg 3/ 5 ~v Hydrologic Balance (cont.): -The Rail Loop Pond (NPDES OO6A) 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 six 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. -The Streeter Pond (NPDES 001 A) contained water approximately one foot below the discharge pipe and was discharging from the weep hole on the pipe at the time of the inspection. The discharge appeared to be a bit muddy. There is an interesting condition at the Streeter pond. The weather has been very cold so the top of the pond is frozen. With the rain the previous weekend all of the snow has melted. This is all flowing into the pond, along with its associated sediment. The problem is that the top of the pond has remained frozen and all of the water coming into the pond is flowing over the ice and discharging. There is very little storage room and detention time because of this. The Division will check the quarterly DMR's for the discharge to see if any exceedences have occurred at the Streeter pond as a result. 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 Gulch A Pond (NPDES 004A) contained water approximately one-and-a-half feet below the discharge pipe and was not discharging at the time of the inspection. The pond was discharging from the weep hole in the discharge pipe. The discharge looked very muddy at the time of the inspection. As with the Streeter Pond noted above, there is an interesting condition at the Gulch A pond. The weather has been very cold so the top of the pond is frozen. With the rain the previous weekend all of the snow has melted. This is all flowing into the pond, along with its associated sediment. The problem is that the top of the pond has remained frozen and all of the water coming into the pond is flowing over the ice and discharging.