Geograph - photograph every grid square

The River Medlock flows west from Tameside & Oldham into Manchester. It runs for 13 miles (including passing through Clayton Vale) before merging with the Irwell at Castlefield. The Industrial revolution exacted a heavy toll on the river, factories & waste tips lining its banks decreased the water quality to such an extent that the river stopped being able to support a fish population. Recent restoration has, however, improved water quality, the river was restocked with fish, and wildlife such as herons and kingfishers can often be seen now.