PERMFILE41436

• Permit No: C1996083
• IBM Index Class Name: Permit File
• Doc Date: 12/11/2001
• Doc Name: CMWB Slope Stability Analysis, Lambert & Assoc Report, May 26, 1999
• Section_Exhibit Name: Volume IV Coal Mine Waste Bank Slope Stability Analysis
• Media Type: D
• Archive: No

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CONSULTING GEOTECHNICAL ENGINEERS AND MATEIaIAL TESTING
May 26', 1999

~.•
Bowie Resources
P.O. Box 483:
Paonia, Colorado 81428;
PN: M9A012GE
Attention: Mr'-..William"•Bear; Jr.
r
Subject: Stability Analysis-for the
BowieFNumberc2 Mine
Refuse~(GOB) Pile near
Paonia;,Coiosado.
Mr. Bear:

,.~ .:
This letter is presents the., 'stults~ of our slope stability
analysis fbr the GOB pile at .'the,oy~xe;Nurdber• ,'Mine.
The slope stability analysis'was pCrf'ormed at-the retiuest`of Mr.
Jim Stover;:. P: E'.-. in response'-. to a letter' from the Divisions of
Minerals and Geoiogy requesting~additionai. st3bility'analysie of
the GOB pile: Based on the-letter fiom"the Divisior~•of Minerals
and Geology we understand that a stability analysis was requested
to indicate that 'the calculated theoretibal factoY of safety of 1'S'
for a static .condition will be provided'w2ien'~the'=pile is completed
based on the~..existing available informaton.of the GOB pil~~in the"
existing tested condition. Our' analy9'es were based- on the-
information we obtaiTed from oLix•,test' bcSY~iYigs -and laboratory"aests
Jim Shover.
Our stability analysis ~ based 'oTi•`the`~•resulta of our three (3)
test borings advanced through the existing GOB pile on January 21
and 22, 1999, density test results of~material samples obtained
from the test borings, the results of our remolded triaxial
compression strength tests of samples obtained from our test
borings and on the pr..oposed..GOB .pi.Ze=cross s~ctio~t~prbv-ided ~by Mr~
We reviewed information~::and sol..sampla st~erigtli''.da€a~'of~~the
proposed disposal site. performed .by •WesCeC;..dat€c~ Jant~a'~'.149'6' and
February- 12, 1997. The letter. ~pYesertt3ng~tMe~=log~'~oA'-tfie-'"soi1.=
materials-and density test resulEa'dated-F6:bnlary,'24, 1999-is
presented in Appendix A ^•. The .results • of our-''labioX~tcTry triaziah
compression strength test data is:'present@d~-in ApF3enfli~'-B~ We
assume that the Westec repdi~ts ate part of -tli¢.~desi~~•'rAcords and -
therefore.are not included in this letter-:.•
P. O. BO% 7986'
GRAND JUNCTION, CO 81507
(970) 2<5-6506
FA%: (970)7<8-9756
P. o. eoz'ao~s
MONTROSE, CO 8107 -
(970) 79.7151
FA%: (970) 2~9J767
7u eooo Da:
DURANOO. CO b1701
(9701759-5095
FA%: (9701797.7515
A