2009-12-03_REVISION - C1996083 ‎(3)‎

• Permit No: C1996083
• IBM Index Class Name: REVISION
• Doc Date: 12/3/2009
• Doc Name: Adequacy Review #2
• From: J.E. Stover & Associates, Inc
• To: DRMS
• Type & Sequence: TR64
• Email Name: JJD
• Media Type: D
• Archive: No

J. E. STOVER & ASSOCIATES, INC.
2352 NORTH 71h STREET, UNIT B
GRAND JUNCTION, COLORADO 81501
PHONE: [phone], FAX [phone]
MINE ENGINEERING
MINE RECLAMATION
December 1, 2009
J. J. Dudash
Division of Reclamation, Mining & Safety
1313 Sherman St., Room 215
Denver, CO 80203

DEC 0 : `9

CIVIL ENGINEERING
CONST. MANAGEMENT
Re: Bowie Resources, LLC, Bowie No. 2 Mine
TR-64 - Increase Height of Coal Refuse Pile No. 4, Adequacy Review #2
Permit C-1996-083
Dear Mr. Dudash:
The DRMS' letter dated November 9, 2009 transmitted its adequacy comments
regarding the subject technical revision. On behalf of Bowie Resources LLC (BRL)
following are its responses to the DRMS' comments and concerns.
Adequacy Items 1 - 7, 9- 16, 17 - 27 and 29: The Division has no further concerns.
8. DRMS - CMWDA-4 has been designed with the intention of first excavating
native soils in order to create an available area for placement of the coal mine
waste. The Buckhom Geotech report dated February 1, 2007 evaluated overall
excavation slopes of 2.51-1: 1V and 2H: 1V. These slopes resulted in acceptable
upper waste fill slopes of 2.51-1:1 V and 31-1:1 V, respectively (page 3, paragraph).
The May 2009 Buckhorn Geotech report steepens the acceptable excavation
slope (assuming a 3:1 upper waste fill slope of 31-1:1 V) from 21-1:1 V to 3H:1 V.
Presumably it is this steepening of the acceptable excavation slope that accounts
for much of the potential increase in the volume of CMWDA-4. Section D-D' of
Volume IX Figure 1 illustrates the relative locations of the original ground surface
and the proposed ground surface. Missing from this Section is a line showing the
proposed excavation surface. Please modify Section D-D' to represent the
approximate limits of excavation that have preceded or are expected to precede
the placement of coal mine waste in CMWDA-4.
BRL: The Operator believes the 2:1 cut slope shown on Figure 1 is
representative of the construction that occurred and therefore does not plan to
revise Figure 1.
16 A. DRMS - Based on BRL's responses in the October 1, 2009 submittal, the
Division has calculated the reclamation cost estimate for TR-64. The revised
liability estimate for TR-64 is $93,936.00 and consists of a summary sheet, a task