ONTARIO’S ABANDONED MINES REHABILITATION PROGRAM Presentation for IAEA/CNSC Workshop Elliot Lake, ON May 1, 2014

Ministry of Northern Development and Mines Mining in Ontario…  Annual mineral production topping $5.5 billion/yr.  Creates an estimated 90,000 jobs.  Produces $1.8 billion in exports.  Typical base metal mine annually contributes $50 million into Ontario’s economy.

Ministry of Northern Development and Mines Ontario Mining Act Rehabilitation of Mining Lands is addressed in Part VII of the Mining Act Proponents must file a Closure Plan before mining can commence Proponents must estimate the costs for mine closure and provide Financial Assurance to implement the closure plan Requirements for Mine Closure are stipulated by Ontario Regulation 240/00 and the Mine Rehabilitation Code 5

Ministry of Northern Development and Mines Mine Rehabilitation Code Schedule 1 1. Protection of Mine Openings to Surface 2. Limit hazards of Open Pits 3. Stability of Crown Pillars (rock left above underground workings) 4. Tailings Dams 5. Surface Water Monitoring 6. Ground Water Monitoring 7. Metal Leaching and Acid Rock Drainage 8. Physical Stability Monitoring 9. Revegetation 6

Ministry of Northern Development and Mines Abandoned Mines Rehabilitation Program Objectives/Goals  Ensure public safety.  Protect the environment.  Invest in the rehabilitation of abandoned mine sites on Crown held lands.

Ministry of Northern Development and Mines Ontario’s Abandoned Mines  Approximately 5,700 known abandoned mine sites located within Ontario containing more than 17,000 documented mine features.  30 to 40% of all of Ontario’s abandoned mine sites are estimated to be on Crown land.  Rehabilitation Costs of all Crown held abandoned mines will likely cost several hundred million dollars.

Ministry of Northern Development and Mines Abandoned Mines Rehabilitation Program (1999 – Present)  Funding to be primarily applied to the rehabilitation of Crown-held abandoned mine sites.  The Abandoned Mines program continues to date with current funding at $4 million per year.  To date, $138 million has been dedicated to the Program.

Ministry of Northern Development and Mines Timminco Mine Site – Haley, ON Magnesium producer Implemented mine closure plan Went into receivership, property abandoned in 2012 MNDM is implementing the closure plan using the Financial Assurance Issues: Ongoing operation of the groundwater containment and treatment system Complete capping of the tailings Removal/disposal of thorium contaminated building materials Hydrocarbon contamination Ground and surface water assessment and monitoring Building demolition 10

Ministry of Northern Development and Mines Timminco Mine Site – Haley, ON 11

Ministry of Northern Development and Mines Questions?