_INSPECTION - C1981019 ‎(36)‎

• Permit No: C1981019
• IBM Index Class Name: INSPECTION
• Doc Name: Inspection Report
• Inspection Date: 4/12/2010
• Email Name: JRS
• Email Name: SB1
• Media Type: D
• Archive: No

Colowyo C-1981-019
12 Apr 10
Pg 3/4
Hydrologic Balance (cont.): -Sump 2 contained a small amount of water(several feet
below the top of the sump) and was not discharging. This sump was partially cleaned but a
large amount of sediment remains in the sump. The sump appeared to be stable at the time
of the inspection.
-Sump 3 contained water approximately one foot below the top and was not discharging. -
-The sump appeared to be stable at the time of the inspection.
Sump 4 was full of sediment and needs to be cleaned. There was no water in the sump
besides what has saturated the sediment. The sump appeared to be stable at the time of
the inspection.
- Sump 5 was full but did not appear to be discharging at the time of the inspection. The
sump appeared to be stable.
- The newly constructed portion of the Taylor Tributary Ditch was observed from
above along the West Pit reclamation (above from the East) and from below, at the
East Taylor Pond. The ditch was not carrying any water and appeared to remain
stable at the time of the inspection. There was some sediment in the ditch from the
runoff from the 2009 West Pit reclamation but the ditch did not appear to be
clogged or blocked. This ditch will carry all of the runoff from the new West Pit
reclamation to the East Taylor Pond. The ditch will be inspected up close and in
more detail as ground conditions permit. **See pictures at the end of this report.**
Backfilling and Grading: - Colowyo has not conducted any additional backfilling and
grading operations in either the East Pit or West Pit since the March 2010 inspection.
There have been discussions regarding additional backfilling and grading operations
that will be completed in 2010 but nothing is concrete at this point.
- The West Pit area that was backfilled, graded, topsoiled and seeded in 2009 was
observed from above (from the east side of the draw). The area was very wet and
muddy but all of the snow had melted off at the time of the inspection. For the most
part this newly reclaimed area has held up well through the winter and runoff season.
There are some rills on some areas of the reclamation that will need to be fixed this
spring. There are also some contour ditches that have filled in with sediment that will
need to be cleaned. There were also a few locations where the contour ditches
breached, which will also need to be fixed. Colowyo will need to formulate a plan
and a timetable to get these problems fixed. The Division will inspect the West Pit
reclamation area up close and in more detail once ground conditions improve.
**See pictures at the end of this report.**
- Although the 2009 East Pit reclamation was inaccessible at the time of the
inspection, it is anticipated that there will be similar problems to those noted in the
2009 West Pit reclamation (based on the sediment present at the inlet of the Prospect
Pond). Colowyo will need to address these issues with a remediation plan and
timetable like that necessary for the West Pit.
- Colowyo continues to use the final cut of the Section 16 Pit as the dump for material
from the South Taylor Pit (from the truck/shovel and excavator/shovel operations).
Colowyo has started the fourth lift at this point. The backfill is being constructed by
end dumping the material in approximately 50-foot lifts. Colowyo plans to continue
using the Section 16 Pit area as their dump until it is backfilled to the post-mining
topography. **See pictures at the end of this report.**