Allanburg Bridge 11 Closure : October 13 to November 11

The bridge will be fully closed to traffic Monday to Friday, from 7 a.m. - 7 p.m. from October 13 to November 11. The bridge will reopen evenings and weekends. 
During the closure, traffic will be detoured via the Thorold Tunnel and the East Main Tunnel.
For questions or comments, please use the Great Lakes St. Lawrence Seaway Contact Form below. 

Seaway Management Form

Temporary Road Closure : Sullivan Avenue : October 2

Sullivan Avenue from Towpath Street to Front Street temporarily closed on Friday, October 2 and will remain closed for approximately three weeks. 

Bridge 11 (Hwy 20) Closure : September 23 to 24

By City of Thorold - Sep 18, 2026

Bridge 11 (Hwy 20) will be closed on Wednesday, September 23 and Thursday, September 24 from 9 a.m. to 4 p.m. due to bridge and road maintenance. All vehicle and pedestrian traffic are prohibited. For questions or comments, please use the Great Lakes St. Lawrence Seaway Contact Form below.

Great Lakes Seaway Contact Form

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3540 Schmon Parkway, PO Box 1044, Thorold ON, L2V 4A7

Phone: 905-227-6613

Email: contact@thorold.ca 

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