Shropshire Union Canal links are to the Llangollen Canal (at Hurleston Junction), the Middlewich Branch (at Barbridge Junction), which itself connects via the Wardle Canal with the Trent and Mersey Canal, and the River Dee (in Chester). With two connections to the Trent and Mersey (via the Middlewich Branch and the Staffordshire and Worcestershire Canal) the SU is part of an important circular and rural holiday route called the Four Counties Ring. The SU main line was the last trunk narrow canal route to be built in England. It was not completed until 1835 and was the last major civil engineering accomplishment of
Llangollen Canal Llangollen Marina and the final section is used only by horse drawn trip boats. The current boats maintain a long tradition, which was first offered to visitors in 1884. The towpath beside the feeder is in good condition, and walkers can reach the weir at Horseshoe Falls. British Waterways maintains a gravel shoal immediately upstream of the marina entrance past Llangollen Wharf. This maintains a draught which most narrowboats cannot pass, but which is passable by the shallow draughted trip boats. In 2005, a marina was constructed by British Waterways, just upstream from Llangollen Wharf, to relieve the acute shortage