INSPEC26917

• Permit No: C1982057
• IBM Index Class Name: Inspection
• Doc Name: Inspection Report
• Inspection Date: 6/29/2006
• Media Type: D
• Archive: No

Ill. 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, with a focus on permanent drainage channel construction and
maintenance in the reclaimed portions of the original permit area (final grading and channel construction has not
yet been completed in the South Extension portion of the permit area). 005-E1 and 005 Gulch permanent
channels in the "D" and "C" pit areas, and 006-NE4 and 006-NE1 Gulch permanent channels in the "B" Pit were
observed from various locations, but the channels were not walked and no measurements were taken. Mike
Boulay and I had conducted a detailed inspection of these channels in October 2005. Remaining 006 watershed
permanent channels in the "A" and "B" Pit reclaimed areas were walked, and measurements were taken during
this inspection. The drainage channel inspection was initiated on the morning of June 29, with the assistance of
Sandy Brown from the DMG Denver Office. We were not accompanied by an operator contact during the
channel inspection; however Roy Kara had been notified of the inspection on June 28.
Weather was clear and warm during both days of the inspection; ground conditions were dry.
Permanent Drainaoe Channel Inspection
005-E1, 005 Gulch, 006-NE4 and 006-NE1 channels that had been closely inspected in October 2005 were
observed but were not inspected in detail and measurements were not taken. It was apparent that maintenance
work had recently been completed in these channels, and comments based on the general observations are
included. Detailed inspection was made for all of the permanent channels in the 006 watershed. On the 006
channels, cross section measurements and depths were taken at various locations. The channels were walked
from upstream end to downstream end. Slope measurements were taken using an inclinometer, sighting from
eye height to corresponding height on the second inspector, standing in the same position in the channel cross-
section, at the opposite end of the measured reach. A number of photos were taken with a digital camera to
document observations and supplement measurements and descriptions.
Digital image labels, brief description of location and site characteristics, and applicable measurements are listed
below:
005-E1 Channel
This channel was inspected in October 2005. The channel was determined to be stable and within
design limits at that time. Please refer to DMG inspection report issued October 12, 2005 for
detailed observations. Although detailed observations and measurements were not made during the
June 2006 inspection, general observation revealed no areas of excessive erosion or other concerns.
005 Gulch Channel
Please refer to DMG inspection report issued October 12, 2005 for detailed observations.
Concern was noted with rills developing between rock check structures along a segment upstream from
Stock Pond T-18, apparently due to piping beneath the cross-checks.
Based on June 2006 general observations, recommended maintenance appears to have been
performed. The operator has recently lowered the middle section of each check structure to allow high
flow to pass over. In addition, riprap has been installed along the intervals between the rock checks.
The maintenance work appears to have improved the stability and functionality of the channel segment.
Rills have been eliminated. Seeding along the channel segments re-disturbed by the repair work
is warranted. Seedmix 6 should be used, as the affected channel segment is located within a
designated upland shrub planting area. See Digital Images 0168, 0169, and 2573.
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