_INSPECTION - C1981041 ‎(23)‎

• Permit No: C1981041
• IBM Index Class Name: INSPECTION
• Doc Name: Inspection Report
• Inspection Date: 10/7/2008
• Email Name: MPB
• Media Type: D
• Archive: No

M. 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.
use area(such as Access Road 1 backfill slopes, Access Road lA fill slopes, and highwall
backfill areas) were revegetated to provide a stabilizing vegetative cover, but the alternative land
use vegetated areas will not be required to meet the specific success criteria applicable to
reclaimed Wildlife Habitat postmining land use areas.
Within PR-3, SCC identified a material deficit for construction of Access Road I and
elimination of the highwall at the South Portal area. Material to compensate for the projected
deficit was obtained from a low hill located within the Unit Train Loadout(UTL) disturbed area.
Borrow of the material from the UTL site removed the crown of the hill, lowering the hill by
approximately 10 feet. This minor reduction in the elevation of the hill is depicted on revised
Exhibit 11 C (Unit Train Loadout Facility Post Mining Topography). The modification did not
significantly change the nature of the postmining landscape, and the amended topography still
achieves AOC in the UTL area.
Disturbed areas other than the locations described above for which the Steep Slope Variance
applies were backfilled and graded to the Approximate Original Contour.
A detailed slope stability analysis for the access road fill and the portal fill at the South Portal is
provided in Appendix 14-8 of the PAP. A cross-section L-L' of the lower parking area, Access
Road IA, and the reclaimed slope above the new access road is shown on Exhibit 26. As shown
in the cross-section the slope above the new access road was reclaimed to an approximate 2:1
slope. This was verified with field measurements using an inclinometer. An inclinometer was
used to field check gradients at various locations. A representative slope of 40%was measured
at the north end of the parking area on the reclaimed slope north of the access road, a slope of
50%was measured on the slope below the access road between the upper bench and Pond 8, and
a slope of 46%was measured on the new portal fill.
Approximately 6 months ago a drainage pipe that extends out of the sealed South Portal had
begun to leak at some point following the sealing of the pipe with 6 cubic yards of grout. The
pipe was inspected by DRMS with Tonya Hammond of SCC in April 2008. The drainage from
the pipe flowed down a ditch to Pond 8. The estimated flow from the pipe was less than 1 gpm.
Subsequently, SCC submitted Technical Revision No. 56 (TR-56) to provide a plan to
completely seal the pipe. The proposed plan was to cap off the end of the pipe and encase it in
approximately one cubic yard of concrete. TR-56 was approved in May 2008 and the pipe has
been sealed in accordance with the approved plan. SCC capped off the end of the pipe and
encased it in approximately two cubic yards of concrete. The site was then backfilled. The
repair was successful and the pipe is no longer leaking and the location is dry and stable. The
South Portal drainage pipe repair location is shown in the attached Photograph No. 9 at the end
of this report.