1. Pennsylvania Mine Removal Strategy Snake River Task Force Meeting May 29, 2013

2. Objectives Reduce exposure levels and control off-site migration of contaminants Phased approach to deal with surface and sub-surface sources Successful collaboration (combine resources) Removal Action under 40 CFR, Section 300.415(b)(2)

3. Phase 1. Site Preparation (2013-2014) F-level drainage over giant waste pile

4. Phase 2. Underground Rehab & Recon (2013) Newly constructed portal access at level F Level F Level C collapsed stopes

5. Phase 3. F-Level Bulkhead (2014) Bulkhead #1 Location Bulkhead #2 Location (optional) View of F-level Cross Cut

6. Phase 4. Waste Rock & Tailings Consolidation (2014-2015) C-Level F-Level

7. Optional Phases (2014….) Phase 5. Seal-off C Level Surface Water Pathways Phase 6. Bulkhead #2 (F-level) Phase 7. Passive Treatment System Phase 8. Post Removal Site Control View of C-Level Cross Cut

8. Next Steps Finalize Action Memo (May 2013) Determine partnership roles & responsibilities (Feb-May 2013) Draft any necessary agreements (2013) Start Phase 1, weather permitting (June/July 2013) Project Schedule