Llangollen Canal an Act of Abandonment in 1944, allowing it to close of canals, including much of the Shropshire Union system. However, the line from Hurleston to Llangollen and onwards to Llantisilio was saved, as it was the main supply of water to the rest of the system. On 6 September 1945, due to inadequate maintenance, the canal breached its banks east of Llangollen near Sun Bank Halt. The flow of hundreds of tons of water washed away the embankment of the railway further down the hill, creating a crater which was long and deep. This caused the first traffic of the
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