_INSPECTION - C1982057 ‎(82)‎

• Permit No: C1982057
• IBM Index Class Name: INSPECTION
• Doc Name: Inspection Report
• Inspection Date: 8/14/2009
• Email Name: DTM
• 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.
General Comments
This was a partial mine site inspection, focusing only on drainage structures along segments of the Tie Across
Haul Road (TAHR). Weather was clear and warm and ground conditions were dry.
I was accompanied on the inspection by Roy Karo, SCC Reclamation Manager.
Roads
In the May inspection report, the presence of gullied relief drain ditches on the large fill slope at the location
referred to by the operator(and on the 2009 Rill and Gully Map)as"Coffee Break Hill"was noted, and the need
for riprap replacement/ditch stabilization was stated on the Rill and Gully Map and reiterated in the inspection
report. In the June inspection report it was noted that large riprap had been placed along the roadsides in the
"Coffee Break Hill" location,for use in ditch repairs.
Various ditch down-drain locations and culvert installations in the"Coffee Break Hill"vicinity and other sections of
the TAHR were inspected on the morning of August 14. Locations where maintenance is warranted include the
following (listed in the order in which they were observed):
• Large rock was recently placed along the relief drain ditch on the north side of the road, on the eastern
end of"Coffee Break Hill" (this is Ditch D-9). The rock was somewhat loosely spread along the bottom
of the scoured channel. Further ditch shaping and placement, with closely spaced riprap extended up
the sides of the channel is warranted.
• The ditch steepens as it flows away from the road and is designated Ditch D-9A. Map Exhibit 13-11.4
(TAHRD "As-Built")depicts a significant length of the lower end of D-9A to be riprap lined. There is
intermittent gully incision along the entire length of D-9A, and most of the originally installed riprap has
been washed out. Maintenance(including ditch shaping and installation of designed riprap or equivalent
TRM liner) is warranted along the entire section, from the upper end of the recently placed rock on D-9,
to the lower end of D-9A.
• Large rock had been loosely spread along the south side road ditch (D-8), across from D-9. The rock
was not properly placed to be effective. The scoured ditch segment needs to be shaped, and the ditch
lined with properly placed riprap or equivalent TRM.
• The north side relief drain ditch to the west of D-9/9A is D-7. Map Exhibit 13-11.3"As Built"depicts a
significant length along the lower segment of the channel to be riprapped, with a silt fence installation at
the lower end of the ditch. As with D-9A, there is intermittent erosion along the length of the channel,
and much of the original riprap has been washed out. The silt fence has also been washed out. Large
rock was recently dumped and spread along a portion of the upper segment of the ditch, but was not
installed so as to effectively prevent downcutting and side-scour. The entire length of D-7 will require
grading/shaping and proper installation of design riprap or equivalent TRM liner. In place of the silt
fence at the lower end of the ditch, a series of trenched in large rock checks would likely be more
effective, given the concentrated flow in that location.
• On the south side of the road, across from D-7, there is another road ditch, where large rock was
recently loosely spread along the upper section of the ditch, but the lower sections of the ditch are
intermittently gullied along a several hundred foot segment down to a wheatfield at the edge of the road
corridor. Proper ditch shaping, and riprap or equivalent TRM installation is warranted.
• Erosional scour was observed at the outlet end of Culvert C-13(rock had been installed originally but
maintenance is warranted along a 30 foot segment below the outlet).
• Culvert C-16 was partially blocked at the outlet end and maintenance is warranted.
• Culvert C-18(across the Coal Hauler's Road)was partially blocked at inlet and outlet; will need to be
maintained or replaced.
The operator needs to conduct a comprehensive check of all drainage structures along the Tie Across
Road, and perform maintenance as warranted (including above noted locations),to be fully completed
by October 30, 2009.
3