Mary River Project Phase 2 Proposal Cumulative Effects Technical Meetings April 8-10, 2019 Mary River Project Phase 2 Proposal Cumulative Effects

Introduction & Overview Confidential

Relevant Projects or Activities Potential Interactions of Other Projects and Activities Relevant Projects or Activities Climate Change Air Quality Noise and Vibration Landforms, Soil and Permafrost Vegetation Migratory Birds and Habitat Terrestrial Wildlife and Habitat Water Quantity Water Quality Freshwater Fish, Fish Habitat and Biota Marine Ice, Water and Sediment Quality Marine Habitat and Biota Marine Mammals Population Demographics Education and Training Livelihood and Employment Economic development and self-reliance Human Health and Well-Being Community Infrastructure and Public Service Culture, Resources and Land Use Contracting and Business Opportunities Benefits, Taxes and Royalties Governance and leadership Past Nanisivik Mine (Decommissioned) X Mary River Project Definition Phase Diamond Exploration Existing Nanisivik Naval Facility and Military Exercises Back River and Hope Bay Projects Regional Ship Traffic Regional Air Transport Communities, Traditional/Recreational Land Use Regional Monitoring Programs Baffinland Regional Exploration Reasonably Foreseeable Tullurutiup Imanga/ Lancaster Sound NMCA Potential Future Development Mine Deposits No. 2 to 5 until 2055

Community Feedback No concerns raised specifically about cumulative effects Concerns raised that are relevant to the cumulative effects assessment: Project effects on Inuit land use activities: travel around railway, and harvesting; Project effects on marine mammals; Project effects on caribou;

Summary of FEIS Results Confidential

Summary of Effects Assessment VEC/VSEC Characterization of Residual Effect(s) Significance Rating Terrestrial Environment Majority of biophysical cumulative effects identified are associated with the potential future development scenario Cumulative effects to wildlife as the result of climate change are not significant Cumulative effects will occur to vegetation abundance, diversity, and health Climate change is expected to result in an increase in vegetation biomass Increased biomass provides minor offsetting effects Vegetation species composition will change with the expansion of shrub and graminoid coverage due to climate change Health effects on vegetation associated with dust deposition are not significant Cumulative effects on vegetation are not significant Phase 2 Proposal has minor effects on caribou that are manageable by mitigation Majority of cumulative effects are related to minor contributions to habitat loss or sensory disturbance Potential future development scenario has the potential to create cumulative effects to caribou Regional exploration by Baffinland also creates disturbance outside of the PDA Not significant Human Environment Cumulative socio-economic effects are largely positive, with adverse effects associated with the potential future development Not significant, Significant (positive) Atmospheric Environment GHG emissions will contribute incrementally to global climate change Air quality, noise and vibration, and landforms, soils, and permafrost have localized effects but no significant cumulative effects Difficult to assess climate change effects Freshwater Environment Cumulative effects to water quantity could occur from water withdrawal from expanded camps during potential future development Cumulative effects to water quality may occur from increased effluent during potential future development Mitigation for water quantity and water quality to reduce effects Offsetting measures and design changes will address the cumulative effects of potential future development on freshwater fish habitat Marine Environment Cumulative effects to marine ice, water, and sediment quality are not significant Under the potential future development scenario, cumulative effects will result from ice breaking but are not significant Ringed seals are affected by ice disturbance during potential future development Narwhals, beluga, and bowhead whales in offshore Baffin Bay are affected by potential future development Cumulative effects on Inuit land use from ice breaking and increased regional ship traffic may result from potential future development Confidential

Information Request and Technical Comment Review Confidential

Information Request

Technical Recommendation Summary Technical Recommendation Category Main Issues Recommendation IDs Summary of Response and Discussion Items Cumulative Effects Information requested on potential cumulative effects of project alternatives CIRNAC 18 Such an analysis would be hypothetical, and would not support a meaningful assessment of cumulative effects Alternatives were evaluated in TSD 01, including their effects Baffinland will work with CIRNAC to determine approach to consideration of potential cumulative interactions of project alternatives Information requested on cumulative effects of water crossings DFO 3.11.2 All crossings, temporary or permanent, will be modelled and designed according to requirements for fish passage. This information and design criteria will reduce potential for cumulative impacts with any other crossing structures on the same waterways. Confirm that all CEA TCs are considered discussion items. No “Technical Recommendations Summary” slide(s) produced. Confidential

Technical Recommendation Summary Technical Recommendation Category Main Issues Recommendation IDs Summary of Response and Discussion Items Cumulative Effects Requests additional analysis of cumulative caribou habitat loss GN 15 A revised CEA has been prepared and includes direct and indirect caribou habitat loss. Recommendation to expand cumulative effects assessment to include Baffinland’s plans for future development GN 26 Future development scenarios are not reasonably foreseeable, as per NIRB’s definition; therefore, expansion of CEA not required. Additional clarity on project and cumulative shipping PC 03 Additional discussion on the number of types of ships in the area has been provided in an updated CEA. Additional information on the cumulative effects of wind turbines QIA 02 Wind turbines have been removed from the Project. “Revised CEA was to be ready for the technical meetings.” Confidential