EAST TOBA & MONTROSE HYDROELECTRIC PROJECT

1. EAST TOBA & MONTROSE HYDROELECTRIC PROJECT

2. Toba Site Montrose Powerhouse East Toba Powerhouse Transmission Line Toba Inlet Project Overview

3. Toba Site Project Overview 3

4. Installed capacity of the two projects will be 196 MW with expected average energy generation of 745 GW.h/yr. • These projects will have the potential to produce enough electricity for • 75,000 homes • will potentially displace an estimated 455,000 tonnes of greenhouse gases annually. • This is the equivalent of • taking 80,000 cars off the road per year or • planting 60,000 hectares of trees. Environment 4

5. Environmental Involvement/Challenges: • High priority for key stakeholders (Owner, Agencies, First Nations, Local Communities) • Operational Challenges • Camp Waste, Batch Plant Operations, Fuel / Oil Storage • Species at Risk • goats, grizzly bears, Northern Goshawks, Marbeled Murrelets, Fish and amphibians Environment

6. Schedule

7. Access Roads Total access road length: 65.0 km Access road completion to date: 62.0 km Bridge completions: 52 of 58 Construction Overview 7

8. East Toba Powerhouse Excavation volume: 62,500 m3 Concrete volume: 7,900 m3 Excavation to date: 38,995 m3 Construction Overview

9. East Toba Penstock • Penstock length: 5,376 m • Estimated cut: 354,000 m3 • Estimated fill: 114,000 m3 • Weholite pipe section: 650 m, 3,048 mm ID • Total sections: 49 pieces • Steel pipe section: 4,726 m • Outer diameter: 2,540 mm – 3,048 mm • Thickness: 9.7mm – 36.6mm • Total sections: 299 pieces • To date excavation: 66,500 m3 Weholite Pipe Section Construction Overview Steel Pipe Section

10. East Toba Intake • Rubber dam design • Intake structure: • Structural excavation: 21,000 m3 • Structural backfill: 24,000 m3 • Concrete volume: 2,080 m3 • Diversion channel: • Excavation: 30,000 m3 • Fill: 17,000 m3 • Rip rap: 14,000 m3 • Liner: 15,000 m2 3 m high Rubber Dam Intake Project Overview Diversion Channel Earthworks

11. Montrose Powerhouse Excavation volume: 45,000 m3 Concrete: 5,800 m3 Excavation to date: 31,300 m3 Project Overview

12. Montrose Penstock • Penstock length: 4,232 m • Estimated cut: 342,000 m3 • Estimated fill: 109,000 m3 • Exposed penstock: 250 m • Slope: 120 % • Steel pipe section: 4,232 m • Outer diameter: 2133 mm – 2743 mm • Wall thickness: 8.6 mm – 24.9 mm • Total welds: 3,900 kg • Total sections: 247 pieces • To date excavation: 100,000 m3 Typical Exposed Penstock and Support Project Overview Typical Exposed Penstock and Support

13. Montrose Intake Coanda Screen Design Structural excavation: 10,500 m3 Structural backfill: 10,300 m3 Concrete Volume: 2,680 m3 Project Overview Geotechnical surveyors at Intake

14. Mechanical Components • 1 Bifurcation pipe per powerhouse • 2 Turbine inlet valves (TIV) per powerhouse • 2 6 nozzle scroll cases per power house • 2 vertical pelton turbines per powerhouse • East Toba: • 78.54 MW max. rated capacity (each unit) • Head: 575.0 m • Montrose: • 47.13 MW max. rated capacity (each unit) • Head: 459.4 m Bifurcation Pipe Construction Overview Installation of Mechanical Components TIV’s and Scroll Cases

15. Transmission Line Total length: 156.8 km Total structures: 760 ea. Excavation to date: 309 ea. Poles installed: 185 ea. Conductors installed: 4 km Project Overview

16. Transmission Line :Types of structures Project Overview Metal Structure Wooden Structures 16 Anchors

17. Major Equipment • Excavators: • Cat 385 1 ea • Cat 365 2 ea • Cat 345 4 ea • JD 450 4 ea • Cat 330 3 ea • Dozers: • D9 2 ea • D8 2 ea • D6 1 ea • Rock Trucks: • Volvo A40 7 ea • Cat 740 3 ea Equipment 17

18. Major Equipment • Drills: • Tamrock 800 4 ea • Hoe Drill 3 ea • Loaders: • Cat 988 1 ea • Cat 980 2 ea • Cat 966 1 ea • Cat 950 2 ea • Crusher/Batch Plants • Portable 1 ea • Track Jaw 1 ea • Batch Plants 2 ea Equipment 18