REV96987

• Permit No: M1980244
• IBM Index Class Name: Revision
• Doc Name: 1.0 INTRODUCTION
• Type & Sequence: AM8
• Media Type: D
• Archive: No

. March 2000
- Appendix D
- Appendix E
• Appendix E-1
• Appendix E-2
- Appendix F
• Appendix F-1
• Appendix F-2
• Appendix F-3
- Appendix G
• Appendix G-1
• Appendix G-2
• Appendix G-3
- Appendix H
1.1 Project Description
-3- 993-2099.150
Assessment of Underground Workings within Limits
of Phase IV Valley Leach Facility
Phase IV Slope Stability Results
Infinite Slope Analysis
Slope Stability Files
Surface Water Hydrology
Letter To OMLR Pertaining to SCS Runoff Curve
Numbers
Output From HEC-1 Models
Culvert Sizing
Water Balance Model Tabular Output Data
Precipitation Data
Evaporation Data
Phase IV Probabilistic Water Balance Model
Technical Specifications
• The existing ore beneficiation facility is located approximately one-mile southwest of the
Cresson Mine. CC&V presently uses a primary and secondary crushing operation to
reduce the ore to a nominal 1-1/2 inch minus material. A conveyor system is used to
transport the crushed ore to a truck loadout bin (LOB) where haul trucks are then used to
place the ore in lifts on the VLF. Phases I, II, and III of the current VLF consists of
approximately 9.8 million square feet (plan area) of lined and active leach area.
The Phase IV design was developed using 1.6H:1 V overall sideslopes in all areas around
the perimeter of the VLF, with the exception of the area upgradient of the Phase II Toe
Berm which would remain at a 2.SH:1V overall slope to an elevation of 9,620 feet. Above
this elevation, the overall slopes would be 2H:1V. The Phase IV design also includes
increasing the maximum ore depth over liner to 590 feet, based on recent testing of the
liner materials, as reported herein.

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