The tunnel is located between locks 18 and 19 of the former third Welland Canal and was built using Queenston limestone, spanning 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.
The tunnel is situated between locks 18 and 19 of the former third Welland Canal, constructed from Queenston limestone and measuring 713 feet in length, including the wing stonework at each end.  Hundreds of workers used picks and shovels, along with horses, to excavate the tunnel. The tunnel was utilized intermittently until 1915 when Harry Eastwood was the last engineer to operate a train through it.