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Edmonton Light Rail

Dr. Sauer and Partners provided construction support services and supervision of the excavation of the Light Rail Tunnels, which were constructed using NATM.
Estimated cost: Commencement:
August 01, 2011
Completion date:
January 01, 2013
1 Sir Winston Churchill Sq NW
Edmonton, AB T5J 2R7
Technical data:
Geology description:

Glacially controlled terrain comprising clay, silt and sand deposits underlain by Mesozoic bedrock consisting of sandstone and shale.

Geology types:
Bid cost: Final cost:
$300 million CAD
Service areas:
Construction methods:
Tunneling under:

The City of Edmonton built a 3.3km Light Rail Train extension from Churchill Station to the Northern Alberta Institute of Technology. Approximately 670m of the extension are underground consisting of ca. 430m of twin tunnels of 6m nominal diameter. NATM/SEM tunneling was applied. The software 2DOC, which was at that point used in North America for the first time, allowed real-time tracking of all geotechnical instruments on the project, as well as the recording of the actual geotechnical conditions and the grout support elements installed.

Excavation under way
Tunnel face