Sundance 6

The Sundance 6 is located 70 kilometres west of Edmonton, Alberta, on the south shore of Wabamun Lake.

This is the first of six coal-fired generating units at Sundance was commissioned in 1970, and the sixth and final generating unit was commissioned in 1980. TransAlta converted the fuel source for Unit 6 at Sundance from coal to natural gas, allowing the plant to provide Albertans with clean, reliable and affordable electricity.

Sundance Units 1-5 have been retired permanently. Unit 6 was mothballed on April 1, 2025.

Unit #	Maximum output (MW)		Status & details
	Coal	Natural gas
1	–	Unit retired	First commissioned – 1970 Permanently retired January 1, 2018
2	–	Unit retired	First commissioned – 1973 Mothballed on Jan. 1, 2018, it was permanently retired July 31, 2018
3	–	Unit retired	First commissioned – 1976 Mothballed on April 1, 2018, it was permanently retired July 31, 2020
4	–	Unit retired	First commissioned – 1977 Permanently retired April 1, 2022
5	–	Unit retired	First commissioned – 1978 Permanently retired November 1, 2021
6	–	401	First commissioned – 1980 Unit 6 was fully converted to natural gas on February 1, 2021 Unit 6 was temporarily mothballed effective April 1, 2025, for a period of up to two years depending on market conditions. TransAlta maintains the flexibility to return the mothballed unit to service when market fundamentals or opportunities to contract are secured.

Wabamun water production table

January to December 2025 – Download

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February 2026 production

Related pages

• Lake Wabamun Community Page
• Wabamun Watershed Management Council
• Summer Village of Seba Beach