Kymijoki hydropower plants
Mankala hydropower plant
The Mankala hydropower plant on the Kymijoki River was built in 1948. Its electricity output is 25 MW. The Mankala plant belongs to Helsingin Energia.
Ahvenkoski hydropower plant
The Ahvenkoski power plant was commissioned in 1933. This remotely controlled hydropower plant situated on the Kymijoki River utilises modern technology in an old facility. Its electricity output is 24 MW. Helsingin Energia bought the power plant in 2000.
Ediskoski power plant
The small-scale hydropower plant of Ediskoski in the Kymijoki River was built in 1990. Its propeller turbine output is 473 kW. Helsingin Energia has owned the facility since the year 2000.
Klåsarö hydropower plant
The Klåsarö power plant was built in 1983, the year the old facility next to it was decommissioned. Helsingin Energia bought the power plant in 2000. Its electricity output is approximately 5 MW.