REP32134

• Permit No: C1981022
• IBM Index Class Name: Report
• Doc Date: 1/12/1996
• Doc Name: FOURTH QUARTER 1995 ENGINEERING INSPECTION EAST YARD GOB DISPOSAL PILE
• Permit Index Doc Type: Waste Pile/Fill Report
• Media Type: D
• Archive: No

• , iii iiii iii
PACIFIC BASIN RESOURCES
A Division of Oxbow Cazbon & Minerals, Inc.
FOURTH 9UARTER 1995
ENGINEERING INSPECTION
EAST YARD GOB DISPOSAL PILE
Pacific Basin Resources approved permit document includes the
requirement to inspect the coal mine waste pile for stability
quarterly. The inspection is to be performed by a registered
engineer or other qualified professional specialist experienced
in construction of earth and rockfill embankments. Both Bear
Coal Company and Pacific Basin Resources have approval to dispose
of coal mine waste in the gob pile.
On December 11, 1995, and on January 2, 1996, I performed a
visual inspection of the east yard gob disposal area at Pacific
Basin Resources, Sanborn Creek Mine. The gob disposal area was
snow covered. Nothing was observed during the inspection that
would indicate the pile has a potential for failure.
Compaction tests were performed for fourth quarter 1993, second
quarter 1994, fourth quarter 1994, second quarter 1995, and
fourth quarter 1995. Gob material has consistently passed
compaction tests. Results of the fourth quarter 1995 compaction
tests are attached.
A survey of the gob pile volume was made on December 14, 1995.
Approximately 1,900 cubic yards had been added between November
1994 and December 1995. Bear Coal Company did not haul any
material to the gob pile during the last year.
From December 26 to December 30, 1995, gob material was removed
from the pile for use as base material for the new Elk Creek Coal
stockpile. A survey of the gob pile volume was made on January
4, 1996. Approximately 900 cubic yards had been removed from the
gob pile.
A failure of the pile would probably not be a hazard to human
life. The pile is located above a large flat bench referred to
as the east yard. The bench is 80' to 100' wide directly below
the pile. If the coal mine waste pile failed, it would very
likely be contained in the east yard. The overland conveyor and
conveyor drive on the bench below the pile might be damaged by a
failure of the pile.

Tlioutas .~y7AAder.so~ Date
Cb~lo,r~}do Registered
Pri~f~ss_ional;d$hg:neer No. 14726
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Sanborn Creek Mine P.O. Box 535 Somerset, Colorado 81434 Phone [phone] Fax [phone]