DESCRIPTION: Passing through the heart of Southwestern Ontario, Highway 4 is a major collector highway linking several communities including Clinton, Ontario, where this new bridge over the Bayfield River was constructed. The community’s 1932 bridge had reached the end of its service life. The GiGo (Get in Get Out) involves the off-site construction of superstructure supermodules. This accelerated bridge construction system minimizes inconvenience to the community. The project included:
Construction of supermodules, consisting of steel box girders and concrete deck on each girder, adjacent to existing bridge.
Two-stage construction: Close 1 lane of existing bridge and remove half of existing bridge utilizing barrier wall separation, cofferdam/dewatering systems around abutments, and a roadway shoring protection system to support and maintain traffic. Construct half of new bridge - drive piles, construct new abutments, transport supermodules to bridge and hoist into place, pour concrete closures, and install railing system. Divert public traffic onto new bridge. Remove remaining half of existing bridge and construct as described above.
Construction of new storm sewer systems, removal and construction of curbs, sidewalks and asphalt road.