Thorold Tunnel
Encyclopedia
The Thorold Tunnel, located in Thorold
Thorold
Thorold may refer to:Places* Thorold, Ontario* Thorold Tunnel, OntarioSport* Thorold Blackhawks, Canadian junior ice hockey teamAnimals*Thorold's deerPeople...

, Ontario
Ontario
Ontario is a province of Canada, located in east-central Canada. It is Canada's most populous province and second largest in total area. It is home to the nation's most populous city, Toronto, and the nation's capital, Ottawa....

, Canada
Canada
Canada is a North American country consisting of ten provinces and three territories. Located in the northern part of the continent, it extends from the Atlantic Ocean in the east to the Pacific Ocean in the west, and northward into the Arctic Ocean...

, is an underwater tunnel, carrying Highway 58 underneath the Welland Canal
Welland Canal
The Welland Canal is a ship canal in Canada that extends from Port Weller, Ontario, on Lake Ontario, to Port Colborne, Ontario, on Lake Erie. As a part of the St...

. Built between 1965 and 1967, the tunnel is 840 metres in length. It consists of two separate tubes, each two lanes wide. The westbound side has a sidewalk for pedestrians.

It is one of three tunnels under the Welland Canal (the other two being Main Street Tunnel and Townline Tunnel
Townline Tunnel
The Townline Tunnel, located in Welland, Ontario, Canada, is an underwater tunnel, carrying Highway 58A as well as the Canadian Pacific Railway under the Welland Canal. The "A" suffix is a misnomer since it is more of a connector than an alternative route. Highway 58A is a two-lane freeway in its...

 in Welland), and the only one constructed after the waterway opened.

This tunnel also had its concrete poured during the Winter months of the year, which led to over-expansion of the concrete, resulting in some cracks in the concrete. Extensive work has been done to correct this issue during the Summer months of the year, closing half the tunnel down, diverting traffic to the other tube, reducing traffic to one lane.

External links

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