GENERAL30475

• Permit No: C1981019
• IBM Index Class Name: General Documents
• Doc Date: 5/4/2007
• Doc Name: Proposed Decision & Findings of Compliance for PR2
• Permit Index Doc Type: Findings
• Media Type: D
• Archive: No

No transfer of wells is proposed. All monitoring wells will be reclaimed prior to bond release.
I. Water Rights and Replacement -Rule 4.05.15
The Applicant has demonstrated that no owner of a vested water right is proximately injured.
J. Discharge of Water into an Underground Mine -Rule 4.05-16
No surface water will be discharged into underground mine workings.
K. Stream Buffer Zones -Rule 4.05.18
The Division approved surface or underground mining activities within 100 feet or through a
perennial stream or stream with a biological community. This decision was based on a finding that
the original stream channel will be restored, water quality and quantity shall not be adversely
affected, and appropriate riparian vegetation will be reestablished. The buffer zone variance is
granted for portions of Goodspring Creek near the sediment ponds which dschazge into that creek,
and that portion of Taylor Creek near the loadout [4.05.18(1)].
L. Probable Hydrologic Consequences
A discussion of the probable hydrologic consequences of mining and reclamation operations is
contained in pages 2.04.7-85 through 101 of the PAP. The original findings document (1982), an
Amended Findings Document for Permit Renewal (1987), and Technical Revision No. 14 (1989)
also include discussions of probable hydrologic consequences. Section 2.04.7 of the PAP and
Section VI ofthe 1982 Findings Document contain extensive discussion ofthe hydrologic balance of
the permit area. Probable Hydrologic Consequences for the South Taylor area are included in
Section 2.05.6(3)(b)(iii) of Volume 12
1. Potential Effects on Surface Water Quantity
Based on the hydrologic balance calculations for the drainages in the general azea and the fact that all
runoff from the mine area is to be either diverted around the mine or retained in sedimentation ponds
for a maximum of 36 hours (Division of Water Resources), no change in the hydrologic balance will
occur. Since the azea to be mined is a fraction of the total watershed azeas, the general area will not
be affected.
The probable hydrologic consequences (PHC) section of the 1982 Findings Document predicted that
there would be no significant effects to the hydrologic balance of Taylor, Wilson or Goodspring
Creeks as a result of mining. Monitoring data in the mine's Annual Reclamation Reports (ARR's) to
date confirms that there have been no significant impacts on water quantity of these streams to date
due to mining operations at the Colowyo Mine.
Proposed Decision and Findings of Compliance 4 May 2007
Permit Revision 02 Page 36