INSPEC18646

• Permit No: C1994082
• IBM Index Class Name: Inspection
• Doc Name: Inspection Report
• Inspection Date: 10/5/2005
• Media Type: D
• Archive: No

III. COMMENTS -COMPLIANCE
Below are comments on the inspection. The comments include discussion of observations made
during the inspection. Comments also describe any enforcement actions taken during the inspection
and the facts or evidence supporting the enforcement action.
This was a partial inspection of the Yoast Mine conducted on October 5, 2005 by Mike Boulay of
the DMG. Dennis Jones of Seneca Coal Company was present during the entire inspection.
Weather conditions were cloudy and cold with snow at higher elevations of the mine site.
Significant rainfall had occurred at the mine site within the previous 48 hours. Ground
conditions throughout the mine site were wet and muddy.
Roads
Access to the mine site was limited due to muddy road conditions. Road surfaces were saturated
and muddy. Haul Road A was accessible. Haul Road B was not accessible beyond the turnoff
for former Haul Road D. A grader was working on Haul Road B to improve the surface of the
road. The county access road along Sage Creek was accessible to Ponds 012, 013, and 014.
Hydrolosic Balance
Sedimentation Ponds 012, 013, and 014 were inspected. Ponds 012 and 013 were dischazging
cleaz water. Dennis Jones changed out hydrographs from each dischazge flume and collected
monthly samples for laboratory analysis from Pond 013. We also collected a sample for
settleable solids from Pond 013. Utilizing an Imhoff Cone aone-liter sample of pond dischazge
was analyzed for settleable solids. The sample result showed 0 ml/I of settleable solids. Pond
014 was retaining a significant amount of water but was not discharging.
Slides and Damaee
SCC informed the DMG of additional slope failure that occurred in mid-September at the site of
the slide-damaged area above Pond 012. The slide was inspected and appeazed to be stable at the
time of the inspection. No significant additional movement has occurred below the former haul
road embankment since the recent slope failure that occurred in mid-September.
SCC is proceeding with mitigation measures including constructing an under drain where a seep
has occurred and was previously noted in DMG inspection reports. SCC also plans to cut out the
slide and move material to the east of the pond. The under drain had been constructed and
backfilled at the base of the slide neaz the pond inlet at the time of this inspection. A trackhoe
was working in the pond inlet area to reconfigure the inlet to the pond. Please continue to keep
the DMG informed of progress in mitigating the slide and stabilizing the slide-damaged area. '