"17.72"^^ . . "River Irwell"@en . . "The River Irwell (/\u02C8\u025Crw\u025Bl/ UR-well) is a 39-mile (63 km) long river which flows through the Irwell Valley in North West England. Its source is at Irwell Springs on Deerplay Moor, approximately 1.5 miles (2.4 km) north of Bacup. It forms the boundary between Manchester and Salford and empties into the River Mersey near Irlam.During the 17th and 18th centuries the Irwell's lower reaches were a trading route that became part of the Mersey and Irwell Navigation."@en . . . . . . . . "400.0"^^ . . . "30.0"^^ . . . .