EAST TOBA & MONTROSE
HYDROELECTRIC PROJECT
Toba SiteEast Toba
Project Overview
Montrose
Powerhouse
Toba Inlet
Powerhouse
Transmission
Line
2
Project Overview
Toba Site
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Environment
•
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.
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•
Environmental Involvement/Challenges:
–
Environment
–
–
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
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6
Schedule
Construction Overview
Access Roads
Total access road length:
65.0 km
Access road completion to date:
62.0 km
Bridge completions:
52 of 58
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Construction Overview
East Toba Powerhouse
Excavation volume:
Concrete volume:
62,500 m3
7,900 m3
Excavation to date:
38,995 m3
8
Construction Overview
East Toba Penstock
Penstock length:
Estimated cut:
Estimated fill:
5,376 m
354,000 m3
114,000 m3
Weholite pipe section:
•Total sections:
650 m, 3,048 mm ID
49 pieces
Steel pipe section:
•Outer diameter:
•Thickness:
•Total sections:
4,726 m
2,540 mm – 3,048 mm
9.7mm – 36.6mm
299 pieces
To date excavation:
66,500 m3
Weholite Pipe Section
Steel Pipe Section
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Project Overview
East
Toba
Intake
Rubber dam design
Intake structure:
•Structural excavation:
•Structural backfill:
•Concrete volume:
21,000 m3
24,000 m3
2,080 m3
Diversion channel:
•Excavation:
•Fill:
•Rip rap:
•Liner:
30,000 m3
17,000 m3
14,000 m3
15,000 m2
3 m high
Rubber Dam
Intake
Diversion Channel Earthworks
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Project Overview
Montrose Powerhouse
Excavation volume:
Concrete:
45,000 m3
5,800 m3
Excavation to date:
31,300 m3
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Project Overview
Montrose Penstock
Penstock length:
Estimated cut:
Estimated fill:
4,232 m
342,000 m3
109,000 m3
Exposed penstock:
•Slope:
250 m
120 %
Steel pipe section:
•Outer diameter:
•Wall thickness:
•Total welds:
•Total sections:
4,232 m
2133 mm – 2743 mm
8.6 mm – 24.9 mm
3,900 kg
247 pieces
To date excavation:
100,000 m3
Typical Exposed Penstock
and Support
Typical Exposed Penstock
and Support
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Montrose Intake
Project Overview
Coanda Screen Design
Structural excavation:
10,500 m3
Structural backfill:
10,300 m3
Concrete Volume: 2,680 m3
Geotechnical surveyors at
Intake
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Construction Overview
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
Installation of Mechanical Components
Bifurcation Pipe
TIV’s and Scroll Cases
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Transmission Line
Project Overview
Total length:
Total structures:
156.8 km
760 ea.
Excavation to date: 309 ea.
Poles installed:
185 ea.
Conductors installed: 4 km
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Transmission Line :
Project Overview
Types of structures
Metal Structure
Wooden Structures
Anchors
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Equipment
Major Equipment
Excavators:
•Cat 385
•Cat 365
•Cat 345
•JD 450
•Cat 330
1 ea
2 ea
4 ea
4 ea
3 ea
Dozers:
•D9
•D8
•D6
2 ea
2 ea
1 ea
Rock Trucks:
•Volvo A40
•Cat 740
7 ea
3 ea
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Equipment
Major Equipment
Drills:
•Tamrock 800
•Hoe Drill
4 ea
3 ea
Loaders:
•Cat 988
•Cat 980
•Cat 966
•Cat 950
1 ea
2 ea
1 ea
2 ea
Crusher/Batch Plants
•Portable
•Track Jaw
•Batch Plants
1 ea
1 ea
2 ea
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