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