Notice of Upcoming Project
PortsToronto (Toronto Port Authority) would like to make bidders aware of an upcoming Construction Contract at the Cherry Street Strauss Trunnion Bascule Bridge (https://goo.gl/maps/HBxVRCpZFcWwkGQM7). The Contract will involve structural, cleaning and coating, mechanical and electrical repairs/upgrades to the existing Bascule Bridge. Other miscellaneous work shall also be included. The Contract is anticipated to Tender in the last week of August/first week of September 2023. The following paragraphs provide additional details regarding the project scope.
General Scope of Work Expected
Structural
Work is anticipated to include, but not be limited to the following: complete sidewalk replacement, deck system repair/localized replacement, various steel strengthening repair details, miscellaneous steel repairs, grating replacement, upgrading of the existing ladder and platform system, expansion of the existing Operator’s House and re-finishing of the existing Machine Room among other repairs.
Additionally, the bascule span steel will be cleaned and coated as part of the Contract. Cleaning and coating of the structural steel on the bascule span will involve providing access, containment and coating of more than 7500m2. Work will take place during two (2) winter navigation closures of approximately twelve weeks each.
Mechanical
The mechanical rehabilitation scope of work includes removal and disposal of existing machinery; precision surveying and alignment work using a laser tracker; fabrication and installation of new mechanical machinery including, but not limited to a custom enclosed gear reducer, shafts, bearings, couplings, open gearing, hydraulic power units, and hydraulic cylinders; and rehabilitation of existing plain bearings by installing new bronze bushings and field machining/line boring the bushings. The execution of the mechanical rehabilitation will require engineering to maintain the balance of the movable span during construction, to coordinate the mechanical work with other elements of work, to rig/lift existing and new components during removal or installation, and for the development of installation procedures to meet the technical requirements of the work.
Electrical
The existing bridge power and control systems is of legacy technology and was installed during the early 1930’s. Today the systems do not meet current code requirements. The goal of the project is to return the bridge electrical systems to a safe operating condition with a life expectancy of at least 30 years. The electrical systems to consist of new electric utility service equipment, power distribution, modern motors and drives, brakes, provision of a state-of-the-art control system and control console. The electrical contractor will be responsible for systems procurement, installation and control systems, testing, commissioning and returning the bridge to service.
