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

Montta hydro power plant

The Montta hydropower plant, completed in 1957, is located in Muhos.

The Montta hydro power plant is the second plant upstream from the sea, after the Oulun Energia Merikoski power plant. The output of our Montta hydropower plant is 47 MW and it has a head of 12.2 meters. Three Kaplan turbines. Average annual production covers the annual electricity use of 9,000+ households with electric heat.

Montta hydro power plant

Nuojua hydro power plant

The Nuojua hydropower plant, completed in 1955, is located in Vaala.

The output of the Nuojua hydro power plant is 81 MW and head is 22 meters. Three Kaplan turbines. Average annual production covers the annual electricity use of about 18,000 households with electric heat.

Nuojua hydro power plant

Pyhäkoski hydro power plant

The Pyhäkoski hydro power plant, completed in 1951, is located in Muhos and is the third power plant upstream in the Oulujoki river.

The output of the Pyhäkoski hydro power plant is 149 MW and the head is 32.4 meters. Our Pyhäkoski plant is the biggest hydropower plant in the Oulujoki water system. Three Kaplan turbines. Average annual production covers the annual electricity use of nearly 30,000 households with electric heat.

Pyhäkoski hydro power plant

Pälli hydro power plant

The Pälli hydropower plant, completed in 1954, is located in Muhos. The plant is the fourth hydro power plant upstream in the Oulujoki river.

The output of the Pälli hydro power plant is 51 MW and head is about 14 meters. Three Kaplan turbines. Average annual production covers the annual electricity use of about 12,000 households with electric heat.

Pälli hydro power plant

Seitenoikea hydro power plant

The Seitenoikea hydro power plant, completed in 1961, is located along the Emäjoki river in Ristijärvi.

The output of the Seitenoikea hydro power plant is 39 MW and the head is 15.6 meters. One Kaplan turbine. Average annual production covers the annual electricity use of about 7,000 households with electric heat.

Seitenoikea hydro power plant

Utanen hydro power plant

The Utanen hydro power plant, completed in 1957, is located in Utajärvi.

The output of the Utanen hydro power plant is 58 MW and the head is 15.7 meters. Three Kaplan turbines. Average annual production covers the annual electricity use of about 13,000 households with electric heat.

Utanen hydro power plant

Ämmä hydro power plant

The Ämmä hydro power plant, completed in 1959, is located along the Emäjoki river in Suomussalmi.

The output of the Ämmä hydro power plant is 16 MW and the head is 10-13 meters. One Kaplan turbine. Average annual production covers the annual electricity use of about 2,000 households with electric heat.

Ämmä hydro power plant