GENERAL32617

• Permit No: C1981020
• IBM Index Class Name: General Documents
• Doc Date: 9/7/1982
• Doc Name: PROPOSED DECISION AND FINDINGS OF COMPLIANCE
• Permit Index Doc Type: Findings
• Media Type: D
• Archive: No

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saturated to the northeast of the five-year permit area. The zone of saturation
in the Cameo seam is probably recharged at the point where the Cameo seam
subcrops below the Salt Creek alluvium, approximately 3 miles upstream of
the mine. Very little recharge of water in coal seams and sandstones will
occur along the outcrops due to the low annual precipitation rate (8.8 inches)
and the steep slopes which favor runoff over infiltration.
The applicant has no monitoring well completed in strata overlying the under-
ground mine workings. This is because of the inaccessibility of the character-
istically steep terrain of the "Book Cliffs" region to truck-mounted drill
rigs. Previous exploration drill holes in the area of the McClane Canyon Mine
have been dry to a depth in excess of 200 feet below the Cameo seam. The
Cameo seam's associated roof and floor strata are not saturated in the area of
the mine. The mine is not a recharge area for these strata (see Figure 4.4-1
and Appendix G). The Munger Canyon lfine is Located updip of the McClane Canyon
Mine, which suggests that the same situation will be the case.
The rock strata within the permit and mine plan areas dip uniformly to the
northeast at 2 degrees. No faults have been identified in the permit and
mine plan areas of the Munger Canyon Mine, but two high angle faults form a
graben structure into which the adjacent McClane Canyon Mine is developed.
These faults may contribute to the equilibrium of ground water levels in the
bedrock aquifers in the region. One set of entries in the McClane Canyon Mine
encountered a fault on the south side of the graben structure. Water flowed
from the fault into this mine. The fault eventually dewatered, and all of the
water produced was contained within the mine workings.
Minor unmapped faults may be encountered by the mine at a future time and may
produce mine inflows. In order to monitor the effect of the operation on
ground water resources and to assist in the prediction of hydrologic impacts
of future permit terms, the following stipulation is required:
Stipulation No. 3
THE PERMITTEE MUST SUBMIT TO THE REGULATORY AUTHORITY AN ANNUAL
REPORT CHARACTERIZING THE INFLOWS, DISCHARGES AND THE CONSUMPTION
OF WATER WITHIN THE PfINE. THIS REPORT TS TO INCLUDE A CURRENT AfINE
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 (i .e., pH,
ELECTRO-CONDUCTIVITY AND TEMPERATURE) OF ALL NON-SEEP INFLOWS; A
TABLE CONTAINING RECORDS OF WATER DISCHARGED FROM THE PQINE, CONSUMED
IN THE MINE AND IMPORTED FOR USE WITHIN THE MINE; A DISCUSSION OF
THE WATER BALANCE WITHIN THE MINE; AND, A PROJECTION OF HYDROLOGIC
IMPACTS OF MINING IN THE UPCOMING YEAR.
Examples of the type of inflow report requested are on file at the Division
office (see inflow reports for the U.S. Steel Somerset Mine and Western Slope
Carbon's Hawk's Nest Mine).