Main Street Tunnel Main Street Tunnel The Main Street Tunnel, located in Welland, Ontario, Canada, is an underwater tunnel, carrying Niagara Road 27 and the unsigned designation of Highway 7146 under the Welland Canal. It is named as a part of East Main Street. The structure was built as a part of the Welland By-Pass project. Its construction was relatively easy since, like the Townline Tunnel, it was constructed at the same time as the channel above it and a simple cut and cover. The tunnel was officially opened on May 20, 1972. The tunnel links Highway 406 on the west side of
Canning Tunnel 1940s and constructed in conjunction with the opening of the dam. 110 men were employed in the first year of construction after which the workforce reduced to 60. The tunnel was built at a cost of $3.5 million and was officially opened in 1975 by Hon. D. H. O'Neil MLA the Minister for Works and Housing on Friday 17 January 1975. The Canning Contour Channel was maintained and partially operated for two years after the tunnel's opening as a precautionary measure. Canning Tunnel The Canning Tunnel is a tunnel that originates just west of Canning Dam and runs for approximately