GENERAL54180

• Permit No: C1981022
• IBM Index Class Name: General Documents
• Doc Date: 9/10/1993
• Doc Name: PROPOSED DECISION & FINDINGS OF COMPLIANCE FOR RN2
• Permit Index Doc Type: FINDINGS
• Media Type: D
• Archive: No

Surface and Ground Water Monitoring
The applicant will conduct monitoring
manner approved by the Division. The
plan is specified on Page 2.05-4fiiii
(4.05.13(1)).
The applicant will conduct monitoring
manner approved by the Division. The
submitted under 2.05.6(s)(b)(iv) and
2.05-46iii of the permit document (4.
of ground water in a
ground water monitoring
of the permit document
of surface water in a
monitoring plan was
as specified on page
05.13(2)).
Discharge of Water into an Underground Mine
Discharge of water to underground workings will not occur.
Stream Buffer Zones
The Division has approved surface and underground mining
activities within 100 feet or through perennial streams. This
decision was based on a finding that on Hubbard Creek the
original stream channel will be restored, water quality and
quantity shall not be adversely affected, and appropriate
riparian vegetation will be reestablished. On the North Fork
of the Gunnison, the decision was based on the fact that the
original stream channel would not be affected and water quality
and quantity would not be adversely affected. The buffer zone
variance was granted for the areas located at the stream
crossing and pre-law bench area at the lower Hubbard Creek site
and the topsoil stockpile at the upper Hubbard Creek site. The
buffer zone variances on the North Fork of the Gunnison are
located at the alluvial well and leach fields just above and
below the town of Somerset (4.05.18(1)).
Probable Hydrologic Consequences of Mining (2.05.6(3)(b)(iii))
This section reviews the Probable Hydrologic Consequences (PHC) of
mining at the Somerset Mine location. The review includes the
probable consequences which will result from the entire Somerset
Mine, including the Sanborn Tracts. The Cumulative Hydrologic
Impact Study (CHIS) for the North Fork of the Gunnison River
contains a detailed analysis of the cumulative impacts of all
currently permitted mine activities within the North Fork of the
Gunnison River drainage basin. The CHIS document is available for
review at the Division office. This PHC is based upon information
contained within Permit No. C-81-022 (Somerset Mine) and upon the
analyses contained within the CHIS for the North Fork Gunnison
River. The PHC separately addresses potential effects on
groundwater and surface water.
Effects on Groundwater
Mining of the Sanborn Creek Tracts of the Somerset tdine will impact
the ground water regime within the immediate area of the proposed
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