GENERAL53077

• Permit No: C1981041
• IBM Index Class Name: General Documents
• Doc Date: 12/1/1982
• Doc Name: Proposed Decision and Findings of Compliance
• Permit Index Doc Type: FINDINGS
• Media Type: D
• Archive: No

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VI. Ground Water Hydrology(cont'd)
To further quantify mine inflows, and to refine the assessment of hydrologic
impacts, the applicant must document the quality, quantity and source of mine
inflows. Thus, the Division is requiring the following stipulation to the permit:
STIPULATION No. 3
THE PERMITTEE SHALL SUBMIT 2YJ THE DIVISION AN ANNUAL REPORT OF INFLOWS,
DISCHARGES AND CONSUMPTION OF WATER WITHIN THE MINE. THIS REPORT IS
TO INCLUDE A MINE WORKINGS MAP SHOWING THE LOCATION AND QUANTITY OF
INFLOWS; A TABLE KEYED TO THE MINE MAP WHICH SHALL CONTAIN THE SOURCE
(I.E., FAULTS, FRACTURES, ETC.), QUANTITY, DURATION, AND QUALITY (p H,
ELECTRICAL CONDUCTIVITY, AND TEMPERATURE) OF ALL INFLOWS; R TABLE
CONTAINING RECORDS OF WATER DISCHARGED FROM THE MINE, CONSUMED IN THE
MINE AND IMPORTED FOR USE WITHIN TXE MINE; AND A DISCUSSION OF THE WATER
BALANCE IN THE MINE.
With satisfactory resolution of the stipulations, the proposed operation will be
in crompliance with ground water hydrology requirements.
VII. Cumulative Hydrologic Impacts (2.05.6(3))
The applicant's statement of hydrologic effects in Section 2.05.6 of Volume V of
the application has been reviewed by the Division for compliance.
There are no other mines in the vicinity of the Roadside and Cameo mines and no
mines are anticipated in the vicinity.
The applicant states that approximately 0.47 cfs of mine discharge water is added to
the Colorado River, increasing the flow by an average of 0.01. However, the Division
has determined, based on all available information, that the mine discharge will not
increase the flow in the Colorado River. As previously discussed, most of the water
pumped from the Cameo mine ultimately comes from the Colorado River by way of
aquifers which subcrop below the alluvium of the river. In addition, the water
pumped from the Roadside mine would naturally contribute to base flows in the
Colorado River through aquifer discharges to the river. Therefore, the mining
operation should have an insignificant effect on the quantity of water in the surface
and ground water systems of the Colorado River.
The effects of mine discharge on river water quality, based on averages weighted by
flow, is to increase soluble salts in the Colorado River by an average of 0.1~,
increase dissolved iron by an average of 0.2~ and have no measurable affect on pH.
Heavy metal concentrations should not be increased because metals are relatively
insoluble at the pH level of the discharge water. A11 these effects are minimal and
will not significantly decrease water quality in the Colorado River. Surface and
ground water monitoring will determine if the effects are minimal, as expected.
As previously discussed, the effects on ground water attributable to the disposal
of coal processing waste in abandoned underground workings will be negligible. The
water used in the disposal process will be reused and what ground water comes in
contact with the waste would not be significantly affected because this ground
water would be in contact with the same material under natural conditions. In
addition, the workings will be flooded, creating anaerobic conditions, which will
slow the dissolution of exposed minerals.
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