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.
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.