HYDRO27744

• Permit No: C1981041
• IBM Index Class Name: Hydrology
• Doc Date: 2/11/1993
• Doc Name: EVALUATION OF ALTERNATIVES FOR MANAGEMENT OF SALT IN MINE WATER DISCHARGES
• Permit Index Doc Type: OTHER SURFACE WATER
• Media Type: D
• Archive: No

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POWDERHORN
' COAL COMPANY
1
February 26, 1993

Colorado Department of Health MAI2 11993
Water Quality Control Division
Permits and Enforcement Section Mlrvt,~
4300 Cherry Creek Drive South ~~~3 GEpLpGy
Denver, CO 80220
RE: Salinity Report, CDPS Permit No. CO-0027146
To Whom It May Concern:
P.O. Bo. 130
Palbatla, Coloratlo 81526
(9031 ~84~7951
Faa (3091 X647161
In accordance with part A.5 of Powderhorn's permit, a "Salinity.
Report" has been prepared to evaluate possible methods and costs
for salt reduction or elimination.
The report was prepared for two salt loading scenarios: The
current level as calculated in the rationale to our CDPS permit
and the projected long term discharge which includes outfall 002.
The following tables have been prepared to show the minimum and
maximum economic affects at coal production levels of 320,000
clean tons/year, 1992 level, and 800,000 clean tons/year,
a former typical level.
IInderground Injection (Min.)
Current Salt Loading Projected Salt Loading
Elimination Reduction Elimination Reduction
Tons of salt/year 472 122 946 596
5 year cost ($000,000) $3.6 1.3 7.0 3.6
Cost/ton of salt $1526 2132 1479 1207
Cost/ton of coal-320K $2.25 0.81 4.38 2.25
Cost/ton of coal-800K $0.90 0.33 1.75 0.90
Natural Evaporation (Max.)
Current Salt Loading Projected Salt Loading
Elimination Reduction Elimination Reduction
Tons of salt/year 472 122 946 596
5 year c ost ($000,000) $21.9 5.7 45.6 17.5
Cost/ton of salt $9281 9348 9847 5868
Cost/ton of coal-320K $13.69 3.56 28.50 10.94
Cost/ton of coal-800K $5.48 1.43 11.40 4.38