Main Street Tunnel technique, whereby the tunnel was excavated, the concrete poured, and the structure buried, on top of which the canal channel was built. This avoided costly boring beneath an active waterway; the structure cost C$11 million. This price was split 50–50 between Transport Canada and the St. Lawrence Seaway Authority. The tunnel opened with a parade featuring the Welland Police pipe band and various officials on the morning of May 20, 1972. 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
Channel Tunnel favoured a drive-through tunnel, but ventilation issues, concerns about accident management, and fear of driver mesmerisation led to the only shortlisted rail submission, CTG/F-M, being awarded the project in January 1986. Among reasons given for the selection was that it caused least disruption to shipping in the Channel, least environmental disruption, was the best protected against terrorism, and was the most likely to attract sufficient private finance. The British "Channel Tunnel Group" consisted of two banks and five construction companies, while their French counterparts, "France–Manche", consisted of three banks and five construction companies. The role of the banks was to