2014-04-07_REVISION - C1996083 ‎(5)‎

• Permit No: C1996083
• IBM Index Class Name: Revision
• Doc Date: 4/7/2014
• Doc Name: 3rd Adequacy Response
• From: J.E. Stover & Associates, Inc
• To: DRMS
• Type & Sequence: TR85
• Email Name: SLB
• Email Name: SB1
• Media Type: D
• Archive: No

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STOVER ASSOCIATE4 INC.
2352 NORTH 7T" STREEET, UNIT B
(BRAND ]UNCTION, COLORADO 81501
PHONE: [phone], FAX: [phone]
MINE ENGINEERING
MINE RECLAMATION
April 7, 2014
Susan Burgmaier
Division of Reclamation, Mining & Safety
1313 Sherman St., Room 215
Denver, CO 80203
Re: Bowie Resources, LLC, Bowie No. 2 Mine
Technical Revision #85, Gob Pile #2 drying area
Adequacy response #3
Permit C -1996 -083
Dear Ms. Burgmaier:
CIVIL ENGINEERING
CONST. MANAGEMENT
The DRMS' email dated March 25, 2014 requested additional information. On behalf of
Bowie Resources, LLC, enclosed are the requested data.
❑ DRMS: The final paragraph on revised page 19 should be revised to say that of
the first five VWPs, only VWP -05 is currently in operation. VWP -07 has also
ceased to function.
BOW: Please see revised page 19.
❑ DRMS: On Page 1, under Referenced Documents, I notice that Buckhorn's TR-
42 analysis (dated Feb. 15, 2006) is not listed. I believe it would be helpful for
HBET to review this report at some point, since it was foundational to a number
of the later Buckhorn analyses. (This is a general comment only; I do not
anticipate that anything in the Feb -2006 would cause HBET to revise the current
TR -85 analysis.)
BOW: HBET reviewed the February 2006 report and is now included in Section 1.1
Referenced Documents. Please see the revised HBET stability analysis dated April
4, 2014.
❑ DRMS: At the bottom of page 3, HBET notes that angles of internal friction of
33.5 and 34 degrees were used in various analyses for drained conditions.
While true, it should also be mentioned that Buckhorn's Sep. 22, 2008 report
(for TR -56) also evaluated the sensitivity to this parameter by evaluating internal