HYDRO20139

• Permit No: C1980007
• IBM Index Class Name: Hydrology
• Doc Date: 12/12/2005
• Doc Name: Discharge Permit CO-0038776
• From: Colorado Department of Public Health
• To: Mountain Coal Company, LLC
• Permit Index Doc Type: NPDES
• Media Type: D
• Archive: No

COLORADO DISCHARGE PERMIT SYSTEM (CDPS)
SUMMARYOF RATIONALE
MO UNTAIN COAL COMPANY, LLC, WEST ELK MINE
CDPS PERMIT NUMBER CO-0038776, GUNMSON COUNT]'
L T}PE OFPERM/T ..................__.................................. Error!Bookmark not defined
II FACIIJTYINFORMATION .......................................... Error!Bookmark not defined
Hd RECEIVING STREAM .................................................. Error! Bookmark not defined
IV FAC/L/TYDESCRIPTION ............................................ Error! Boobnark not defined
V. PERFORMANCEHISTORY ......................................................................................1
Vl TERMSAND CONDITIONS OF PERA9T .................................................................. 3
VII REFERENCES ........................................................................................................... 11
VIII PUBLIC NOTICE COMMENTS ................................................................................71
L TYPEOFPERMIT Renewal
IL FA CILITY INFORMATION
A. Facility Type: Industrial, Minor
Fee Category:
or
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Cate Coal Mining, Category 02, Subcateggory 2
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nnua $1,5
B. SIC Code: 1222 (Coal Mining Underground)
C. Legal Contact: Gene Di Claudio, President
PO Box 591
Somerset, CO 81434
[phone]
D. Facility Contact: Henry Barbe, Environmental Engineer -
[phone] Fax [phone]
E. Facility Location: In the NE'/., Section 16, T13S, R90W, approx. one mile east of Somerset, CO on Highway 133.
F Discharge Point: Table II-7 shows all relevant information for outfalls at this facility.
Table II-1 -Discharge Points
m ~ _-..<_

004 x'~ , m*
,.k+'.
MB-2R ~' N,(3 .
~ ". sr~~a~2t%'~Q'
MW, SR, misc. ~ ~ ~Xa' ` .
~~.{~ -. YY
0.142 ~ ].. ~
.rL'Y~ i~Tt~~ s
1.603 MG ~ "'~ -CS '
.fit
x5.706 MG t t tea r r w
..§C:.,. i. $~'Ce3~t~~~.2tef~+ "~
North Fork of the Gunnison River
MB-3 SR ND 0.169 MG 0.746 MG North Fork of the Gunnison River
(/vi * N/A Domestic 0.02** NA 0.0105 MGD North Fork of the Gunnison River
008 MB-4 SR (Loadout) 0.020 0.007MG 0.026 MG North Fork of the Gunnison River
009 MB-5 SR 0.001 0.182 MG 0.489 MG North Fork of the Gunnison River
011 N/A MW ND NA No Discharge Sylvester Gulch
012 N/A MW ND NA No Discharge Dry Fork of Minnesota Creek
013 N/A MW ND NA 2.88 MGD Lone Pine Gulch
014 SG-1 SR ND 0.42 MG 0.75 MG Sylvester Gulch
015 RPE SR ND 0.46 MG 2.12 MG North Fork of the Gunnison River
- ort or o t e nntson cues
017 MWTF MW 0.62 NA 2.88 MGD West Fork of Sylvester Gulch
018 Borehole SR ND N/A N/A West Fork ofSylvesier Gulch
- s ace run o -mine water, es a ce water rom [ e or or o t e rtnu on ver, re nave [ o averse ow, means norms m u a e occurs
(discharge m occur intermiaendy), -mine w¢[er treatment facility, "Outfa 007 discharger fo Pond MB-2R, which subsequently discharges via Outjall 004 to the
arch Forkaf the Gusmisort Rlver, 'Design capacity
G. CMLRB Permit No.: C-80-007
HI. RECEIVING STREAM
An assessment of the steam standards, low flow data and ambient srream data has been petfonned to determine the assimilative
capacities for the Nonh Fork of the Gunnison River, Sylvester Gulch, West Sylvester Gulch, the Dry Fork of Minnesota Creek and Lone
Pine Gulch for potential pollutants of concern. This information, which is contained in Appendix A to this rationale, also includes an
antidegradation review, where appro state. The Division's Permits Unit has reviewed the assimilative cappacmes to. determine the
appropnate wafer 9ualiry-based effluent limitations as well as potential limits based on the anrideggrradation evaluation, where
a hcable. The limitations based on the assessment and other evaluations conducted as part of this rahbnale can be found in Tables VI-
I, YI-2, VI-3, VI-4, and VI-S of this rationale.
N FACILITYDESCRIPTION
. ~. Industry Description
1. T e o Indus The facility is an urzderground coal mining operation producing bituminous coal. The maximum production
rate u prolecte at 8.2 million tons per year. In 1999, 7.0 million tons were produced.
ISSUED: APRIL 19.2004 EFFECTIVE: JUNE 1, 2004 EXPIRATION: MAY 31, 2009