Limestone Generating Station

Limestone Generating Station

Limestone is Manitoba Hydro’s fifth generating station built on the Nelson River in northern Manitoba. It is also the largest in the province. Limestone is located 750 km north of the City of Winnipeg and 260 km south of the northern town of Churchill. On the lower arm of the Nelson River, it is 23 km downstream from the Long Spruce Generating Station, which in turn is 18 km downstream from the Kettle Generating Station.


  • Located on Nelson River;
  • Construction started 1985;
  • Construction completed 1990;
  • Cost $1.43 billion;
  • Capacity 1,350 MW;
  • Powerhouse 299 metres long, 56.5 metres wide;
  • Unit spacing 26.5 metres;
  • 10 turbine generators (units);
  • First unit in service September 1990;
  • All 10 units in service September 1992;
  • Transmission lines:
    • 230-kV AC to the Henday Converter Station;
    • 500-kV DC to Winnipeg.
  • 30 intake gates, each measuring 5.5 metres by 14 metres;
  • 7 spillway gates, each measuring 13 metres by 16 metres;
  • Total dam and dyke volume 2,900,000 m3.
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Nelson River generating stations: Limestone

Watch a short video on the history and development of this generating station.

Play video: Nelson River: Limestone. (2:13)