Oulujoki river system

Oulujoki is a 107 km long river in the Oulu province in Finland. Fortum has eleven hydro power plants in the Oulujoki river system: Aittokoski, Ala-Utos, Jylhämä, Leppikoski, Montta, Nuojua, Pyhäkoski, Pälli, Seitenoikea, Utanen and Ämmä.

Oulujoki river system, Montta hydro power plant

Aittokoski hydro power plant

The Aittokoski hydro power plant, completed in 1960, is located along the Emäjoki river in Suomussalmi.

The output of the Aittokoski hydro power plant is 45 MW and the head is 30 meters. One Kaplan turbine. Average annual production covers the annual electricity use 6,000+ households with electric heat.

Aittokoski hydro power plant

Ala-Utos hydro power plant

The Ala-Utos hydro power plant, completed in 1957, is located in Utajärvi.

The Ala-Utos hydro power plant is the smallest in the Oulujoki water system and utilises the elevation difference of two water channels. The output of the power plant is 1 MW and the head is about 6 meters. One Francis turbine. Average annual production covers the annual electricity use of about 70 households with electric heat.

Ala-Utos hydro power plant

Jylhämä hydro power plant

The Jylhämä hydro power plant, completed in 1952, is located in Vaala.

Jylhämä is the first hydro power plant downstream from Oulujärvi lake, and it regulates the water level in Oulujärvi lake. The output of the power plant is 55 MW and the head is 11-14 meters. Three Kaplan turbines. Average annual production covers the annual electricity use of 10,000+ households with electric heat.

Jylhämä hydro power plant

Leppikoski hydro power plant

The Leppikoski hydropower plant, completed in 1963, is located along the Emäjoki river in Paltamo.

The output of the Leppikoski hydro power plant is 21 MW and the head is 11.1-13.3 meters. Two Kaplan turbines. Average annual production covers the annual electricity use of about 4,000 households with electric heat.

Leppikoski hydro power plant