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
Waterloo Tunnel Waterloo Tunnel The Waterloo Tunnel in Liverpool, England, is a former railway tunnel, long, which opened in 1849. Its western end was at 53.414829, -2.994385, underneath Pall Mall. From here the line continued under Great Howard Street to Waterloo Goods railway station, now the site of the Kingsway Tunnel Ventilation Shaft, after 1895 continuing beyond to the dock railway system and on to Liverpool Riverside at the Pier Head for direct connection to the passenger liners. The eastern end opens into a short () cutting, four tracks wide between Byrom Street and Fontenoy Street, which connects to the Victoria Tunnel,