Next phase of structural and seismic upgrades to Granville Bridge begin this month
Work will soon become more visible along Granville Bridge, as the City continues upgrading the essential infrastructure we all depend on daily.
As part of the 2019-2022 Capital Plan, construction has been underway since fall 2018 to maintain the structural integrity and improve the seismic resilience of Granville Bridge. These upgrades will help to ensure that the bridge continues to serve us well into the future.
Funding for the project includes $23.8 million from the Capital Plan with another $10.6 million contributed by TransLink.
Construction will be underway until 2021 to replace bearings and expansion joints, and repair concrete and steel to the:
- Steel span
- South approach ramps
- North approach ramps
Until now, work has been relatively limited to the underside of the structure at the north end, but later this month will shift to the south end, followed by the marine span.
About Granville Bridge
Built in 1954, Granville Bridge is a seven-span, 537 metre-long steel deck truss bridge, and is supported on concrete piers with a concrete deck. The bridge is showing signs of aging common to bridges of its age and construction type.
The bridge is inspected regularly as part of the City’s Bridge Inspection Program, and as per standard industry practice:
- City crews conduct routine maintenance inspections every six months
- Monitoring inspections are conducted on annual basis
- Detailed inspections of the bridge are conducted by engineering consultants on a five-year cycle
Previous repairs and upgrades to the bridge
- 2016: localized repairs to the Gantry System
- 2013: replacement of the steel truss span bearings
- 2012: repairs to one of the north-end piers
- 2009/2010: shear capacity upgrades
- 1997: seismic retrofit of the Granville main north and south approaches, which included pier strengthening, bearing replacement, adding seismic restraints, and bracing to the truss spans
The City’s construction process includes isolating construction zones to ensure public safety, as well as the safe containment and disposal of materials. As part of these current upgrades, crews have not detected any debris falling from the girders of the bridge. City staff have also been in contact with the Operations Coordinator for Granville Island, who has advised of no recent observations or evidence of falling rust or debris from the bridge.
In response to the recent report, crews have inspected the bridge and only found evidence of minor surface rust, which is typical of a coated steel structure. The surface rust was removed and then recoated.