Harecastle Railway Tunnel
1,763 Yards. Harecastle Tunnel - North Staffordshire Railway
Harecastle Tunnel is a canal tunnel on the Trent and Mersey Canal at Kidsgrove in Staffordshire. It is made up of two separate, parallel, tunnels described as Brindley (2,880 yards) and the later Telford (2,926 yards) after the engineers that constructed them. Today only the Telford tunnel is navigable.
The tunnel is only wide enough to carry traffic in one direction at a time and boats are sent through in groups, alternating northbound and southbound. Ventilation is handled by a large fan at the south portal.
The Brindley tunnel was constructed by James Brindley between 1770 and 1777. Brindley died during its construction. At the time of its construction it was twice the length of any other tunnel in the world.
Sources of Information
-  Wikipedia