_INSPECTION - C1981019 (25) - Laserfiche WebLink

Home Browse Search

Colowyo C-1981-019 10 November 2008 z5c7— Pg 2/6 Roads (cont.): - The light-use roads in the East Pit reclamation area were all muddy but they all remained stable and well maintained at the time of the inspection. Hydrologic Balance: - The Wash Bay Pond (not a NPDES discharge point) contained water approximately five feet below the top of the embankment and was not discharging. This is a total containment pond and discharge into the Work Area Pond triggers BTEX testing (in addition to regular NPDES testing). The operator and the contractors use this pond for water for their water trucks. The pond embankment was well vegetated and appeared to be stable at the time of the inspection. No erosional problems were noted on the pond embankment at the time of the inspection. - The Work Area Pond (NPDES 002A) contained water approximately two feet below the top of 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 were noted on the embankment at the time of the inspection. The emergency spillway is a riprapped, open channel. The spillway was stable at the time of the inspection. - The Gossard Pond (NPDES 003A) contained water approximately three feet below the riser 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 a 12" culvert. The concrete sump at the inlet of the pond has some sediment in it, which is its job, and appears to be functioning as designed by keeping this sediment out of the Gossard pond. - The West Pit Pond (NPDES 008A) contained a small amount of water (approximately two feet below the bottom of the gated valve on the riser pipe at the bottom of the pond) at the time of the inspection. The presettling sump at the inlet of the pond also contained a small amount of water but it was not discharging into the main part 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 Rail Loop Pond (NPDES 006A) contained water approximately two feet below the gated 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 Stoker Siding Pond (NPDES 005A) contained water approximately four feet below the riser 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. The emergency spillway is an open, trapezoidal riprapped channel. The spillway was stable and well maintained at the time of the inspection.