McIntosh Perry was retained by the Ministry of Transportation (MTO) to act as Total Project Management to provide detail design services, and to complete a Class Environmental Assessment (Class EA) activities under a Group ‘C’ undertaking as required for the Environmental Clearance for the replacement of the Bayfield River Bridge (Site 12-188).
The existing structure was a 61.7m two-span steel Warren type deck-truss bridge built in 1949. The replacement structure was an 85m half through arch, with two (2) 70m long free-standing trapezoidal steel arches. The new structure is to be replaced on the alignment of the existing bridge.
Long-term full closures of the road were not acceptable due to long detours in the area. Traffic analysis was carried out to assess detour and staging options. It was determined that the best option was maintaining one-lane of traffic in each directions at all times. McIntosh Perry designed the use of an on-site detour using a 72m two-lane, 9.14m wide temporary modular bridge (TMB). The TMB was constructed within MTO ROW, to the west of the existing bridge.
The transportation design component included design of the temporary detour alignment approaching the structure, improved cross-section of new structure to new standards including a separated pedestrian walkway and shoulders to accommodate cycling. Traffic component included field reviews, inspection of signs and hazards, staging design of the bridge replacement, traffic analysis report, traffic management plans, detour review and signing plans, pedestrian crossing review, sightline analyses, and preparation of traffic control SPs.
Other services provided included: environmental services, utility coordination and constructability review.
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