e-mosty June 2018 American Bridges American Bridges | Page 54
Herold Engineering was selected as the Prime
Consultant and bridge designers for the project for
the Municipality of Saanich and the Town of View
Royal who were dual owners of the bridge.
The 120-metre-long bridge replaces a very narrow
and busy 80-year-old two-lane creosoted timber
trestle bridge with a four-span structure using
continuous Vierendeel steel trusses and a non-
symmetric partial precast and composite cast-in-place
concrete deck that varies from 20 m to 22 m.
Being in a semi-marine environment, it was desired
that welded connections minimize the use of mouse-
holes and other openings. Connections were
therefore specified using a combination of CPJ and
PJP weld methods.
Surespan was contracted by Ruskin Construction to
supply & deliver Architectural arched steel trusses &
half-depth concrete deck panels for the Craigflower
bridge in Victoria, BC. The arched steel trusses were
metallized to protect them from the elements and the
process provides them with a lovely silvery/grey
appearance. Surespan received an award from the
CISC (Canadian Institute of Steel Construction) for the
steel trusses.
Key challenges on the project were design, schedule,
budget, traffic disruption on a very busy roadway,
First Nations archeological constraints, a very
environmentally sensitive marine crossing of the
Gorge Waterway, and the maintaining of pedestrian
access during construction, including access to both
an adjacent elementary school and a secondary
school.
Construction of the piers also required the relocation
of existing oyster beds to adjacent areas.
DEH CHO BRIDGE PROJECT
Project Team
The $200 million bridge is the first built over the
Mackenzie River, Canada’s longest river, and is the
largest bridge project undertaken in the Northwest
Territories.
Structural Engineer: Sargent & Associates Engineering
Ltd., Infinity Engineering Group Ltd.
Project Manager / General Contractor: Ruskin
Construction Ltd.
The bridge provides year-round service for cars and
trucks along Highway 3, connecting Yellowknife in the
Northwest Territories with Highway 1 in the South.
Fabricator: Rapid-Span/Structal JV
Detailer: Tenca Steel Detailing
2/2018