PERMFILE40010

• Permit No: C1981038
• IBM Index Class Name: Permit File
• Doc Date: 12/11/2001
• Section_Exhibit Name: VOLUME 5A - INFLOW MITIGATION
• Media Type: D
• Archive: No

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measured as 0.276 cfs (123.9 gpm). Therefore, the maximum
depletion of the stream due to the inflow into the mine would
amount to only 4 percent during the low flow period. This impact
on stream depletion is considered insignificant.
CWI is working on the relocation of the irrigation diversion
from East Roatcap Creek into West Roatcap Creek. The mitigation
plans for the replacement of 5.4 gpm will be presented in a
separate document.
3.2 Impact on Water Quality
At this stage of mining no water is being discharged from
the mine. During 1984, a total of 10 million gallons of water
were imported into the mine. This amount of water was used in
the following way:
o increased coal moisture, 6 million gallons;
o .evaporation and seepage on roadways, 3
million gallons;
o sanitary, 1 million gallons.
Zt is assumed that with the expansion of the mined area the
need for additional water will increase. However, this increase
of water consumption will not be directly proportional to the
size of the mine and will depend mainly on the coal production
rate. The in-mine water consumption in 1984 is based on a mining
rate of 1.3 million tons of coal per year (1984 production). At
the present time, the mining rate is only 0.3 million tons of
coal per year and, therefore, the water consumption can change
substantially. However, the mining rate of 1.3 million tons of
coal per year was used in the future water consumption estimates
because this is the projected long term mining rate. By the end
of 1989, the mined area will total approximately 1,415 acres and
the water consumption is estimated at a minimum of 15 million
gallons per year or 28.5 gpm. Total inflow at the same time was
estimated at 8.7 gpm, therefore, it is assumed that no water will
be discharged from the mine by the end of 1989.
By the end of the mine-life, as planed at this time, the
mine area will increase by an additional 2,122 acres and the
estimated water consumption could amount to approximately 22
million gallons per year (42.0 gpm). At that time the total
water inflow into the mine will be about 33.5 gpm and, therefore,
no discharge from the mine is anticipated.
If, in the case of reduced mining rates or other reasons
during the mine life, it is necessary to discharge water out of
the mine, the effluent water will be pumped into a sedimentation
pond and discharged into Stevens Gulch. This has been approved
by the NPDS No. 0033685.
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