Kolbäcksån is a

river A river is a natural flowing watercourse, usually freshwater, flowing towards an ocean, sea, lake or another river. In some cases, a river flows into the ground and becomes dry at the end of its course without reaching another body of wate ...

located in

Bergslagen Bergslagen is a historical, cultural, and linguistic region located north of Lake Mälaren in northern Svealand, Sweden, traditionally known as a mining district. In Bergslagen, the mining and metallurgic industries have been important since th ...

in the middle of

Sweden Sweden, formally the Kingdom of Sweden,The United Nations Group of Experts on Geographical Names states that the country's formal name is the Kingdom of SwedenUNGEGN World Geographical Names, Sweden./ref> is a Nordic country located on ...

. It is about 180 kilometres long, arises in the province

Dalarna Dalarna () is a '' landskap'' (historical province) in central Sweden. English exonyms for it are Dalecarlia () and the Dales. Dalarna adjoins Härjedalen, Hälsingland, Gästrikland, Västmanland and Värmland Värmland () also known a ...

and flows through the province of

Västmanland Västmanland ( or ), is a historical Swedish province, or ''landskap'', in middle Sweden. It borders Södermanland, Närke, Värmland, Dalarna and Uppland. Västmanland means "(The) Land of the Western Men", where the "western men" (''västerm ...

into the

Mälaren Mälaren ( , , or ), historically referred to as Lake Malar in English, is the third-largest freshwater lake in Sweden (after Vänern and Vättern). Its area is 1,140 km2 and its greatest depth is 64 m. Mälaren spans 120 kilometers from e ...

. The river drains an area of approximately 3,100 km² and has an average discharge of 27 m³/s. The city of

Fagersta Fagersta is a locality and the seat of Fagersta Municipality in Västmanland County, Sweden, with 11,130 inhabitants in 2010. Geography The city is located at the junction of two railways between Ludvika-Västerås and Avesta (Krylbo)-Örebro, ...

lies on the river and the

Strömsholm Canal The Strömsholm Canal ( sv, Strömsholms kanal) runs from Smedjebacken to Lake Mälaren near Strömsholm Strömsholm () is a locality situated, in the vicinity of Herrskogen, in Hallstahammar Municipality, Västmanland County, Sweden with 664 inh ...

follows the river about 100 kilometres.

References

Rivers of Västmanland County Norrström basin Rivers of Dalarna County {{Sweden-river-stub