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
England European continent than any other part of mainland Britain. It is separated from France (Hauts-de-France) by a sea gap, though the two countries are connected by the Channel Tunnel near Folkestone. England also has shores on the Irish Sea, North Sea and Atlantic Ocean. The ports of London, Liverpool, and Newcastle lie on the tidal rivers Thames, Mersey and Tyne respectively. At , the Severn is the longest river flowing through England. It empties into the Bristol Channel and is notable for its Severn Bore (a tidal bore), which can reach in height. However, the longest river entirely in England