Hojum Power Station is the second hydroelectric power station in Trollhättan

Trollhättan

Trollhättan is a city and the seat of Trollhättan Municipality, Västra Götaland County, Sweden with 44,498 inhabitants in 2005. It is located 75 km north of Sweden's second-largest city, Gothenburg....

, the first one being the older Olidan Power Station

Olidan Power Station

Olidan Power Station is the name of a hydroelectric power station located in Trollhättan, Sweden. First opened in 1910, it was the first large scale attempt at generating electricity from water in Sweden...

. While the first two turbines were taken into service in 1938, a third one was built and started in 1992. The first two are rated at 50 MW, while the third is rated at 70 MW.

The station is mainly located underground in a large mountain hall. This design was chosen because of the political instability in Europe

Europe

Europe is, by convention, one of the world's seven continents. Comprising the westernmost peninsula of Eurasia, Europe is generally 'divided' from Asia to its east by the watershed divides of the Ural and Caucasus Mountains, the Ural River, the Caspian and Black Seas, and the waterways connecting...

 at the time, which later led to the second world war

World War II

World War II, or the Second World War , was a global conflict lasting from 1939 to 1945, involving most of the world's nations—including all of the great powers—eventually forming two opposing military alliances: the Allies and the Axis...

. The relatively small building above ground was drawn by the Swedish

Sweden

Sweden , officially the Kingdom of Sweden , is a Nordic country on the Scandinavian Peninsula in Northern Europe. Sweden borders with Norway and Finland and is connected to Denmark by a bridge-tunnel across the Öresund....

 architect

Architect

An architect is a person trained in the planning, design and oversight of the construction of buildings. To practice architecture means to offer or render services in connection with the design and construction of a building, or group of buildings and the space within the site surrounding the...

Erik Hahr.