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Record of Decision

Volume 1

• Table of Contents, Summary, and Chapters 1 and 2
• Chapter 3
• Chapters 4 thru 6
• Chapter 7, and Index
• References
• Glossary
• Acronyms and Abbreviations

Volume 2 (Figures and Appendices)

Chapter 1

• Figure 1-1. Dos Pobres/San Juan Project Regional Location
• Figure 1-2. Dos Pobres/San Juan Project area
• Figure 1-3. Decision processes of federal permit agencies

Chapter 2

• Figure 2-1. Detailed site plan of Dos Pobres/San Juan project
• Figure 2-2. Ore process flow diagram
• Figure 2-3. Typical cross section and design details - leach pad
• Figure 2-4. Leach pad internal PLS collection system detail
• Figure 2-5. SX/EW plant site plan
• Figure 2-6. Current and projected peak distribution of daily vehicle round trips during construction
• Figure 2-7. Projected peak distribution of daily vehicle trips during operations for trucks and employee traffic compared to year 2011 projections
• Figure 2-8. Typical diversion channel cross-section
• Figure 2-9. Typical riprap-reinforced channel transition
• Figure 2-10. Plan view and typical cross-section for curve reduction alignments
• Figure 2-11. Lower west diversion channel plan and profile
• Figure 2-12. Upper west diversion channel plan and profile
• Figure 2-13. South diversion channel plan and profile
• Figure 2-14. Peterson Wash diversion channel plan and profile
• Figure 2-15. Peterson Wash diversion dam - cross section
• Figure 2-16. Stormwater impoundment plan view
• Figure 2-17. Stormwater dam locations within the Dos Pobres area
• Figure 2-18. Retention dams downstream of East Development Rock Stockpile
• Figure 2-19. Typical cross section retention dam
• Figure 2-20. Development rock stockpile slope typical section
• Figure 2-21. Partial backfill alternative (1.7M)
• Figure 2-22. Selected lands photos
• Figure 2-23. Foreseeable uses of selected lands
• Figure 2-24. Regional locations of offered lands
• Figure 2-25. Base package of offered lands photos
• Figure 2-26. Optional package offered lands photos
• Figure 2-27. Amado and Curtis properties offered lands
• Figure 2-28. Musnicki property offered lands
• Figure 2-29. Schock property offered lands
• Figure 2-30. Feulner property offered lands
• Figure 2-31. Tavasci Marsh property offered lands
• Figure 2-32. Freeland and Bulter-Borg properties offered lands
• Figure 2-33. Norton property offered lands
• Figure 2-34. Clyne I and Clyne II properties offered lands

Chapter 3

• Figure 3-1. Topography, springs and major drainages in the project area
• Figure 3-2. Rights-of-way and state-owned mineral estate in the project area
• Figure 3-3. BLM grazing allotments and range improvements within the project area
• Figure 3-4. Process boundary for air quality analysis (1M)
• Figure 3-5. Class 1 areas within 100 kilometers of the project area
• Figure 3-6. Geologic map
• Figure 3-7. Geological cross section (schematic) through project area
• Figure 3-8. Mineral potential blocks of selected lands
• Figure 3-9. Conceptual model of groundwater flow
• Figure 3-10. Locations of wells in the project area and observed water table
• Figure 3-11. Location of pilot-wells and observed water table
• Figure 3-12. 100 year floodplain within the project area
• Figure 3-13. Biotic communities within the project area
• Figure 3-14. Mine adits and caves and Pima Indian mallow location in the project area
• Figure 3-15. Distribution of low income census blocks relative to the project area
• Figure 3-16. Transportation study area
• Figure 3-17. Powerline routing detail and constraints analysis
• Figure 3-18. Civil airport imaginary surface definitions for the Safford airport

Chapter 4

• Figure 4-1. Portions of allotments fenced off and unavailable for grazing
• Figure 4-2. Estimated sound pressures and ground motion (peak particle velocities, PPV) emanating from proposed pit mines
• Figure 4-3. Sound pressure levels and range expected from air blasts
• Figure 4-4. Computer-generated photographic visual simulation of the project (400' leach pad)
• Figure 4-5. Water balance for calibrated steady-state model
• Figure 4-6. Scatter plot of predicted vs. observed water level elevations for steady-state conditions
• Figure 4-7. Predicted steady-state water table
• Figure 4-8. Proposed Action predicted water table decline after 16, 100, 800, and 3000 years
• Figure 4-9. Pre-mining groundwater flow conditions and predicted impacts to groundwater beneath the San Carlos Apache Reservation
• Figure 4-10. Modeled impact of altered groundwater flow on Gila River and Bonita Creek flows
• Figure 4-11. Total predicted impact on the Gila River compared to historic flow rates
• Figure 4-12. Fallowing program mitigation compared to total predicted impact on the Gila River (peak and cumulative net volumes)
• Figure 4-13. Outfall and recovery points for washes with altered flows
• Figure 4-14. Modeled water levels in Dos Pobres and San Juan pit lakes
• Figure 4-15. Modeled pit lake water chemistry compared to water quality standards
• Figure 4-16. Cross sections showing relationship of proposed powerlines to horizontal and conical surfaces -- Sections A-A' and B-B'
• Figure 4-17. Cross sections showing relationship of proposed powerlines to horizontal and conical surfaces -- Section C-C'
• Figure 4-18. Past, present and foreseeable future actions

Appendices

• APPENDIX A. 404 (b)(1) Alternatives Analysis (Document split to reduce load time)
  • 1st half (2.5M)
  • 2nd half (4.2M)
• APPENDIX B. Legal Description of Selected and Offered Lands
• APPENDIX C. VRM CLASS OBJECTIVES
• APPENDIX D. Archaeological Sites in the Project Area
• APPENDIX E. Descriptions of Offered Lands not Selected for Inclusion in the Land Exchange Alternative (1.9M)
• APPENDIX F. Clean Water Act Section 404 Mitigation and Monitoring Plan (6.9M)
• APPENDIX G. Comparative Summary of the Impacts of Parameter Changes in Model Sensitivity Analysis

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