_INSPECTION - C1981019 ‎(47)‎

• Permit No: C1981019
• IBM Index Class Name: INSPECTION
• Doc Name: Inspection Report
• Inspection Date: 6/15/2010
• Email Name: JRS
• Email Name: SB1
• Media Type: D
• Archive: No

Colowyo C-1981-019
15 June 10
Pg 4/12
Hydrologic Balance (cont.): - The West Taylor Pond (NPDES 011 A) contained water
approximately three feet below the top of the discharge pipe and was discharging
from the weep hole at the time of the inspection. The water discharges into the
Taylor Creek and it looked clear. There was water flowing into the pond at the inlet
(from the A-A' underdrain area of the West Taylor Fill). There was a small amount of
sediment at the inlet of the pond but it does not appear to be a problem at this time.
The pond embankment is well vegetated and stable and no erosional problems
were noted (although this pond embankment was seeded at the same time as the
Section 28 Pond, its exposure has allowed for good vegetative growth). The
emergency spillway is a riprapped, open channel, which appeared to be stable.
**See pictures at the end of this report.**
- The Gossard Pond (NPDES 003A) contained water approximately three feet below
the discharge pipe and was not discharging at the time of the inspection. The pond
embankment was well vegetated and stable and no erosional problems were noted.
The emergency spillway is a 12-inch culvert.
- The Rail Loop Pond (NPDES 006A) was almost dry at the time of the inspection. The
pond embankment was well vegetated and stable and no erosional problems were
noted. There is a fair amount of sediment (in the form of coal fines) in the pond.
Colowyo is planning on cleaning the pond this summer when it dries out. Colowyo
needs to haul the fines back to the pit area as opposed to piling them at the edge of
the pond, where they will just wash back into the pond.
- The Stoker Siding Pond (NPDES 005A) contained water approximately two feet
below the top of the discharge pipe and was discharging an immeasurable trickle
through the weep hole. There was no water flowing into the pond at the time of the
inspection. The pond embankment was well vegetated and appeared stable and
no erosional problems were noted.
- 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.
There was a small amount of water flowing into the pond from the inlet at the
northeast end of the pond. The pond embankment was well vegetated and stable
and no erosional problems were noted. The emergency spillway is a riprapped,
open channel. The spillway appeared to be stable.
- The Wash Bay Pond (not an NPDES discharge point) contained water approximately
three feet below the top of the embankment and was not discharging. This is a total
containment pond for water from the wash bay in the facilities area. Any discharge
from the pond would be from an emergency spillway and would flow into the Work
Area Pond. If this pond were to discharge into the Work Area Pond Colowyo would
be required to test the discharge for BTEX.
- The Section 16 Pond (NPDES 009A) contained water approximately eight feet below
the top of the discharge pipe and was not discharging at the top of the inspection.
There was no water flowing into the pond from either the Section 16 Perimeter Ditch
or the Section 16 Pond Ditch at the time of the inspection. The pond embankment
was well vegetated and stable and no erosional problems were noted. The
emergency spillway is a riprapped, open channel. The spillway was stable. **See
pictures at the end of this report.**