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Ottawa Light Rail Transit - Design
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Ottawa Light Rail Transit - Design
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| Service: | Tender design, preliminary and full detailed design including execution drawings for the mined twin track running tunnel, three mined station caverns and access shafts.
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| Estimated cost: | Commencement: | March 01, 2012
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Completion date: | Ongoing
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| Location: | 529 Albert St Ottawa, ON K1R 7Z0 Canada |
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| Geology description: | The geology varied between competent limestone and fractured shale. A soft ground section included highly variable glacial till deposits comprising sand, silt and clay layers and a groundwater table close to ground surface. |
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| Bid cost: | Final cost: | $2.1 billion CAD
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| Tunnel length: | 2.5km
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Description
Ottawa's Confederation Line runs from Tunney's Pasture station in the west to Blair station in the east, is 12.5 km long and includes 15 stations. The central piece is a 2.5 km long tunnel, running under the central business district of the city and including three underground stations. The twin track running tunnel and the three underground stations were constructed using the mined construction method in order to minimise surface disruption. The underground stations are located directly adjacent to existing, sensitive and sometimes historic buildings and required detailed studies of risks and risk mitigation measures during design and construction.
