_INSPECTION - C1980005 ‎(6)‎

• Permit No: C1980005
• IBM Index Class Name: INSPECTION
• Doc Name: Inspection Reports
• Inspection Date: 10/15/2008
• 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.
• Minor channel erosion was noted along a short segment of PM-6 above Stock Pond T-32, upstream of
the riprapped section. This section was marked on the 2008 Rill and Gully Survey Repair Map, but no
work has yet been conducted. An approximate 100 foot section was intermittently eroded up to 18
inches deep; the gully is beginning to recover naturally, but minor maintenance such as hand
placed rock checks or similar measures would facilitate recovery, and is recommended.
Disturbance associated with equipment access and repair work would probably be counter-productive in
this location.
• A short gully segment immediately adjacent to South Road B, north of Pond 008, has not yet been
repaired, and maintenance including riprap or rock check installation would appear to be
warranted to prevent possible headcutting.
• An intermittent gully up to 2 feet deep on reclaimed steep south facing slope in the Pond 4 watershed,
north of the South Road, was properly graded and repaired.
• A gully caused by an old temporary diversion around a shrub planting site, above Road F, south of Stock
Pond T-30, was inadvertently not checked during the inspection. The SL-3 inspection noted that both
the old diversion and the resulting gully would need to be repaired. This location will be re-checked
by the Division during the next site inspection.
• A road ditch outlet below the junction of Road C and Road F had eroded in the past, and in the SL-3
inspection, stabilization measures were requested by the Division. The location was re-checked during
the October 16 inspection, and the determination was made that the location appears to be stabilizing on
its own, and that it should be monitored, but no remedial work is necessary at present.
• A small slump that occurred within the bond release area in a former topsoil stockpile location,
immediately to the west of Channel PM-10, approximately 100 yards north of a gully reclaimed in 2007
with TRM installation, had been properly graded to eliminate the slump scarp and blend the feature back
into the surrounding terrain.
Comments Not Related to the SL-3 Bond Release
• In the inspection report dated June 5, 2008, which was written based on review of aerial photos taken
during a flight of May 29, 2008, the Division noted the presence of"an apparent sinkhole type feature",
located near the perimeter of the reclaimed area, north of Pond 008, east of the South Road Crossing
of Channel PM-8. In fact, the feature was not a"sinkhole", but was a small slump, which was
subsequently documented by the operator in the Rill and Gully Survey Map. The slump had been
properly graded and reclaimed prior to the October 2008 inspection. The slump was located within the
125.8 acre"East Wadge Pit Area", which was excluded from the SL-1 Phase 1 bond release, and was
not included in the SL-3 Phase 2 bond release area.
• Substantial gully repair grading has occurred on the steep slope of the East Wadge Pit Area in the last
couple years, and a series of cross-slope V ditches were constructed to divert slope drainage into
Channel PM-8; to minimize further slope erosion. One concern was noted within this area during
this inspection. A corridor or flow path perhaps 40 to 60 feet wide with a high density of rills
and gullies was observed on the slope between V Ditch #3 and V Ditch#4. The gullies are
apparently remnant from erosion that occurred prior to ditch construction. Further grading,
slope roughening, and seeding appears to be warranted in this location.
• An area of reclaimed Wolf Creek"pre-law" spoils in the northern portion of the permit area, which had
been excluded from the SL-2"pre-law" bond release was inspected. The excluded area
encompasses approximately 68+acres (including small areas associated with access and drainage
construction adjacent to the Wolf Creek Pit area). The area was excluded from the SL-2 bond release
due to poor vegetation establishment, extensive slope erosion, and impoundment of low pH water
within a pond in the location of the final mine pit. The problems were due to steep slopes and acid
forming surficial spoils. Remedial grading was conducted in 2007, to repair erosion damage, and
eliminate ponding by establishing positive grade in the final pit area. The remedial project also
included construction of a new drainage channel (PL-1)downstream of the Wolf
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