In the period that little work was happening on the Leeds Liverpool the Lancaster canal company seemed to be building bits of canal and linking them with tramways. Walton summit and the piece across from wigan being examples of the Lancaster tramways. Passing over the Ribble on a large trestle bridge.
This led to the eventual leasing and taking over of the Johnson Hillocks to Wigan section of Lancaster Canal by the Leeds Liverpool, hence the dad end at the top of Wigan Locks, a lovely bridge over a canal that goes nowhere. It was a fascinating time for canal builders and tram roads that would be replaced by railways.