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,
Prees Branch Canal Nature Reserve Canal (now the Llangollen Canal) to Prees, but was only constructed as far as Quina Brook. It is only navigable as far as a marina, beyond which the reserve is effectively a long pond and its banks. Prees Branch Canal Nature Reserve Prees Branch Canal Nature Reserve is a Shropshire Wildlife Trust nature reserve in the civil parish of Whixall, Shropshire, England. It is a Site of Special Scientific Interest due to the presence of rare pondweeds (Potamogeton), and also is the home of watervoles. Dragonflies and other invertebrates occur in the water, on the banks and in the air