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
Pressure Tunnel and Shafts In 1831 Michael Ryan was granted 100 acres in Bankstown, which included this site, and for many years the area was called Ryan's Paddock. The Church of England School established here in 1862, becoming the first public school in 1868, but was moved to North Bankstown in 1913. The first post office opened in 1863, but closed in 1918. Investigation for a large pressure tunnel was begun in 1914, to assist the trunk mains between Potts Hill and Crown Street. The tunnel was to extend from Potts Hill Reservoir to the Waterloo pumping station, approximately 16 kilometres. To allow for