It covers a distance of 127 miles (204 km), it crosses the Pennines, and includes 91 locks on the main line.
[2] The canal was planned by James Brindley and authorised by an Act of Parliament in 1768.
[1] They are built with stone retaining walls with steps to enable access for those opening the lock gates.
There are overflow channels in the top two chambers, that run into the by-wash that flows alongside.
Hand-crafted English oak gates made at Stanley Ferry in Wakefield and weighing 4.5 tonnes (5.0 tons) were swung into place on the locks in a £3.5 million restoration programme.