Construction starts on new Lower Don Bridge for Ontario Line subway
Metrolinx has announced the start of major construction works on the new Lower Don Bridge.
Once complete, the bridge will carry Ontario Line trains across the Don River between the Corktown and Riverside communities.
In 2023, construction crews cleared the area, relocated a watermain that went beneath the railway, and shifted the existing train tracks. Doing so helped prepare the site for the start of bridge construction.
The tracks needed to be shifted because the Ontario Line will run alongside GO Trains in the shared rail corridor in the area. Shifting the tracks makes it possible for continued GO service during Ontario Line construction and makes space for new Ontario Line tracks.
With the site now cleared and utilities moved, construction on the new bridge’s east support structure is starting with installation of two concrete and steel piers that will support the foundation of the bridge. Work on the west support structure will begin once the east side is completed.
The new bridge will be built north of the existing Lower Don Bridge over the Don Valley Parkway and the Don River.