2019-12-13_REVISION - M1980244 ‎(37)‎

• Permit No: M1980244
• IBM Index Class Name: Revision
• Doc Date: 12/13/2019
• Doc Name Note: Exhibit N - Appendix 1
• Doc Name: Request For Amendment To Permit
• From: CC&V
• To: DRMS
• Type & Sequence: AM13
• Email Name: TC1
• Email Name: MAC
• Email Name: BFB
• Email Name: ERR
• Email Name: JPL
• Media Type: D
• Archive: No

TABLE OF CONTENTS
1. INTRODUCTION........................................................................................................................ 1
1.1. Project Description........................................................................................................... 1
1.2. Scope of Work.................................................................................................................. 2
2. SITE DESCRIPTION.................................................................................................................... 3
2.1. Location and Topography................................................................................................. 3
2.2. Climate ............................................................................................................................. 3
2.3. Underground Workings.................................................................................................... 3
2.4. Seismicity.......................................................................................................................... 4
3. SITE SUBSURFACE CONDITIONS .............................................................................................. 4
3.1. Site Investigation.............................................................................................................. 4
3.2. Site Geotechnical Conditions ........................................................................................... 5
3.3. Laboratory Testing Program............................................................................................. 5
4. VALLEY LEACH FACILITY DESIGN.............................................................................................. 6
4.1. General............................................................................................................................. 6
4.2. Staged Construction......................................................................................................... 7
4.3. PSSA Embankment........................................................................................................... 8
4.4. Valley Leach Facility Foundation...................................................................................... 8
4.5. Liner System..................................................................................................................... 9
4.5.1. Lined Pad Area................................................................................................... 9
4.5.2. Pregnant Solution Storage Area...................................................................... 10
4.6. Leak Detection System................................................................................................... 10
4.7. Solution Collection System............................................................................................. 10
4.7.1. High Volume Solution Collection System........................................................ 10
4.7.2. Low Volume Solution Collection System......................................................... 11
4.8. Appurtenant Structures ................................................................................................. 11
4.9. Reclamation/Closure..................................................................................................... 12
4.10. Technical Specifications .............................................................................................. 12
5. GEOTECHNICAL ANALYSIS...................................................................................................... 13
5.1. Stability Analysis............................................................................................................. 13
5.1.1. General ............................................................................................................ 13
5.1.2. Design Ground Motions .................................................................................. 13
5.1.3. Model Development........................................................................................ 14
5.1.4. Material Properties ......................................................................................... 14
5.1.5. Results ............................................................................................................. 16
5.2. Settlement Evaluation.................................................................................................... 16
5.2.1. General ............................................................................................................ 16
5.2.2. Model Development........................................................................................ 17
5.2.3. Results ............................................................................................................. 17
5.2.4. Conclusion ....................................................................................................... 18
6. WATER BALANCE ................................................................................................................... 18
6.1. System Analysis.............................................................................................................. 18
6.1.1. System Inflow Evaluation ................................................................................ 18