1. HYDROELECTRIC PROJECT
EAST TOBA & MONTROSE
HYDROELECTRIC PROJECT

2. Toba Site Project Overview 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. Environment 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. Construction Overview
Access Roads
Total access road length: km
Access road completion to date: 62.0 km
Bridge completions: 52 of 58
Construction Overview 7

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

9. Construction Overview
East Toba Penstock
Penstock length: ,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. Diversion Channel Earthworks
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 Project Overview Excavation volume: 45,000 m3
Concrete: 5,800 m3
Excavation to date: 31,300 m3
Project Overview

12. Montrose Penstock Project Overview Penstock length: 4,232 m
Estimated cut: 342,000 m3
Estimated fill: 109,000 m3
Exposed penstock: 250 m
Slope: %
Steel pipe section: 4,232 m
Outer diameter: 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. Geotechnical surveyors at Intake
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 Construction Overview
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: m
Montrose:
47.13 MW max. rated capacity (each unit)
Head: m
Bifurcation Pipe
Construction Overview
Installation of Mechanical Components
TIV’s and Scroll Cases

15. Transmission Line Project Overview 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
Anchors 16

17. Equipment Major Equipment Excavators: Cat 385 1 ea Cat 365 2 ea
JD ea
Cat ea
Dozers:
D ea
D ea
D ea
Rock Trucks:
Volvo A ea
Cat ea
Equipment 17

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