McArthur Generating Station

Photo of McArthur Generating Station

In 1952, 50 years after the waters of the Winnipeg River were first used for the generation of electricity, construction began on McArthur Falls Generating Station. Its 8 turbine generators (called units) have a 54 MW capacity and can produce, when water conditions are ideal, an average of about 380 million kilowatt-hours (kWh) of electricity per year.

Now known as McArthur Generating Station, it is the smallest and newest of the 6 generating stations operating on the Winnipeg River.

McArthur is located about 120 km northeast of the City of Winnipeg.


  • Construction started 1952;
  • Construction completed 1955;
  • Cost $24 million;
  • Capacity 56 MW;
  • Average annual generation 380 million kWh;
  • Waterfall drop 7 metres;
  • Powerhouse 177 metres long;
  • 8 turbine generators (units) (each turns at 85.7 rpm);
  • First unit in service 1954;
  • Units’ discharge capacity 996 m3/s of water;
  • Forebay area 115 km2;
  • Forebay’s normal water level 254.8 metres;
  • 8 spillway gates, each measuring 13.1 metres wide and 11.3 metres tall (structure is .8 km east of powerhouse);
  • Spillway’s discharge capacity 4,528 m3/s of water;
  • Transmission lines:
    • 2 115-kV (one each to Pine Falls and Seven Sisters generating stations).