INSPEC30100

• Permit No: C1991078
• IBM Index Class Name: Inspection
• Doc Date: 5/2/1997
• Doc Name: COAL INSPECTION REPORT
• Inspection Date: 4/30/1997
• Media Type: D
• Archive: No

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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 partial inspection of the Hamilton Mine was conducted by Wally Erickson from the
DMG Durango office, 484 Turner Drive, Building F, Suite 101, Durango, CO 81301,
phone [phone]. No activity was observed, no mine personnel encountered.
Signs & Markers -Mine identification sign and safety signs were posted at mine
entrance. Perimeter markers were observed. Topsoil signs posted at stockpile #2.
Roads -Access to mine site is provided by Montrose County Road HH31 from Colorado
Highway 141. Mine roads were well maintained. Road side drainage ditches were well
maintained. Road drainage for mine entrance road is treated for sediment by silt fence,
silt fences were generally intact and appeared to be functioning appropriately. Road
culverts were clear of sediment and debris.
Hydrologic Balance -Sediment pond A, located at far north end, was dry. Primary
spillway was 4" PVC pipe with valve for controlling discharge. Debris guard for inlet of
primary spillway was absent. Primary spillway inlet and outlet were clear of sediment
and debris. Evidence of erosion at outlet of primary spillway was not observed.
Secondary spillway was open channel with riprap lining. Black impermeable fabric lining
was evident underlying the rock lining. Secondary spillway was stable, no evidence of
erosion was observed. Vegetative cover for pond embankment was sparse, however,
embankment appeared stable, evidence of minor erosion observed.
Sediment pond B, located at NE corner of permit area, was holding water. Water depth
was visually estimated at 2', water level was 3" below inlet of primary spillway. Two
Mallard hens were observed at pond B. Numerous deer tracks were present at water
line. Evidence of livestock located on pond embankment and pond inslopes. Two small
lizards were observed at east pond inlet. Primary spillway was 4" PVC pipe with valve
for controlling discharge. Debris guard for inlet of primary spillway was absent. Primary
spillway inlet and outlet were clear of sediment and debris. No discharge was observed.
Evidence of erosion at outlet of primary spillway was not observed. Secondary spillway
was open channel with riprap and vegetation lining. Secondary spillway was stable, no
evidence of erosion. Pond inlet on west side appeared stable, channel was lined with
rock and vegetation. Channel for east side pond inlet had been reinforced with silt
fence fabric, utilized as channel lining. Silt fence fabric had separated on channel floor,
evidence of minor erosion observed. Silt fence lining at east side inlet needs to be
repaired or removed and replaced with rock lining. Massive pond embankment was
vegetated and appeared stable. Weeds were observed on pond embankment.
Livestock pond, located at former position of sediment pond C, was dry. Pond
embankment, pond bottom and inslopes were well vegetated and stable. Spillway
structures for pond were not evident.
Revegetated areas were fenced from livestock and appeared stable, no evidence of
excessive erosion observed.