Merritton Tunnel
Built in 1876, the tunnel is located between locks 18 and 19 of the former third Welland Canal, was built using Queenston limestone and spans a total length of 713 feet when including the winged stone work at either end. Hundreds of men armed with picks and shovels, as well as several horses were used in the excavation of the tunnel. The tunnel was used periodically until 1915, when Harry Eastwood was the last official engineer to pilot a train through the tunnel. It was sealed in 2007. -from Wikipedia
abandoned
