Volme
The Volme is a river in North Rhine-Westphalia, Germany, and is a tributary of the river Ruhr. It is long, of which about lie within the city limits of Hagen. Its largest tributary is the Ennepe. The Volme rises at above sea level in the southeastern part of the Ruhr region, southeast of the town Meinerzhagen. It flows through the municipalities of Meinerzhagen, Kierspe, Halver (Oberbrügge), Lüdenscheid (Brügge), Schalksmühle and Hagen and empties into the Ruhr at above sea level. In the city of Hagen, the Volme is predominantly canalised, and since 2004 has been under restoration. Tributaries  of the Volme are, from the mouth upstream: Industrial development. In the pre-industrial age, numerous mills, smithies and foundries arose along the Volme, from which the iron industry developed during the 19th and the 20th centuries. The Hagen–Dieringhausen railway runs through the valley.