Highway 20 Bridge
As of June 9, 2026, the Highway 20 bridge in Thorold usually stays closed about 12 minutes each time it opens for a ship (typically 11–13 minutes), based on 290 recorded closures and closing-soon alerts.
The Highway 20 bridge crosses the Welland Canal at Allanburg, in Thorold just south of St. Catharines. It's Bridge 11, a vertical-lift bridge from around 1930 that raises its deck for passing ships. In 2001 the laker Windoc was struck by the lowering span here, and the crossing stayed shut for months while it was rebuilt.
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Scheduled closures
Planned closures for construction or repairs. Dates can change.
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Typical closures
Typical closure
12 min
11–13 min
Closing-soon warning
11 min
9–12 min
Status changed
…
How long closures last
1–9 min
5%
10–15 min
93%
16–30 min
2%
31–60 min
0%
60 min+
0%
Based on 290 recorded closures and closing-soon alerts. Durations are measured per lift; the bars are a share of completed closures.