Llangollen Canal agreement had been reached in 1802 on a route from Tilstock Park to Hurleston Junction, on which work started immediately. It was completed on 25 March 1805. In order to keep the system supplied with water, an Act of Parliament obtained in 1804 had authorised the construction of a navigable feeder from the north end of Pontcysyllte aqueduct to LLangollen on onwards to Llantisilo, where the Horseshoe Falls weir would be constructed on the River Dee. Once this opened in 1808, the system was not short of water. The Ellesmere company attempted to buy out the Chester Canal in 1804,
Llangollen water from the River Dee at Llantysilio (at the weir called "Horseshoe Falls"). After company mergers, the canal became part of the Shropshire Union System. Until recently it was properly called the Llangollen Branch of the Shropshire Union Canal, though it is now known as the Llangollen Canal. The canal supplied enough Dee water to supply Crewe and Nantwich, and when commercial traffic failed in the 1940s, it was its function as a water supply which kept it open. The canal is unusual amongst Britain's artificial waterways in having a strong flow (up to 2 miles per hour). Since the