Power plants in the Puget Sound Energy balancing area

The Puget Sound Energy balancing area takes in 34 power plants with 3,339 MW of nameplate capacity, the 33rd-largest of the 40 areas covered here. Its plants sit in two states, with Washington holding 89% of the capacity. Natural gas makes up 62% of the mix, and the largest plant is Fredonia (WA) (376 MW). Since 2020, 516 MW has come online here, 97% of it wind.

Natural gas2,072 MW62%
Wind868 MW26%
Hydroelectric340 MW10%
Biomass and waste37.9 MW1.1%
Solar15.5 MW0.5%
Oil and petroleum2.7 MW0.1%
Battery storage2 MW0.1%

Capacity by decade it came online

Natural gasOil and petroleumHydroelectricWindSolarBattery storageBiomass and waste

Above the line: capacity operating in 2025. Below: capacity retired at plants that still run.

The 25 largest plants in the area

Rank	Plant	State	Runs on	Capacity	First unit
1	Fredonia (WA)	Washington	Natural gas	376 MW	1984
2	Clearwater Wind I	Montana	Wind	366 MW	2022
3	Mint Farm Generating Station	Washington	Natural gas	319 MW	2008
4	Goldendale Generating Station	Washington	Natural gas	303 MW	2004
5	Ferndale Generating Station	Washington	Natural gas	286 MW	1994
6	Wild Horse	Washington	Wind	273 MW	2006
7	Frederickson	Washington	Natural gas	178 MW	1981
8	Encogen	Washington	Natural gas	176 MW	1993
9	Whitehorn	Washington	Natural gas	169 MW	1981
10	HF Sinclair Puget Sound Refining	Washington	Natural gas	140 MW	1991
11	Skookumchuck Wind Facility	Washington	Wind	136 MW	2020
12	Sumas Power Plant	Washington	Natural gas	126 MW	1993
13	Upper Baker	Washington	Hydroelectric	105 MW	1959
14	Lower Baker	Washington	Hydroelectric	104 MW	1960
15	Vantage Wind Energy LLC	Washington	Wind	90 MW	2010
16	Snoqualmie 2	Washington	Hydroelectric	38.7 MW	1957
17	Sierra Pacific Burlington Facility	Washington	Biomass and waste	28 MW	2007
18	Twin Falls Hydro	Washington	Hydroelectric	24 MW	1989
19	Electron	Washington	Hydroelectric	22.8 MW	1904
20	Snoqualmie	Washington	Hydroelectric	12.8 MW	1898
21	Koma Kulshan	Washington	Hydroelectric	12 MW	1990
22	Calligan Creek Hydroelectric Project	Washington	Hydroelectric	6 MW	2018
23	Hancock Creek Hydroelectric Project	Washington	Hydroelectric	6 MW	2018
24	Cedar Hills	Washington	Biomass and waste	5.4 MW	2009
25	Camas Solar Project	Washington	Solar	5 MW	2022

States

State	Plants	Capacity
Washington	33	2,974 MW
Montana	1	366 MW

Operators with the most capacity

Operator	Plants	Capacity
Puget Sound Energy Inc	15	2,470 MW
Clearwater Energy Resources LLC	1	366 MW
HF Sinclair Corporation	1	140 MW
Southern Power Co	1	136 MW
Invenergy Services LLC	1	90 MW
Sierra Pacific Industries	1	28 MW
Central Rivers Power US, LLC	1	24 MW
Electron Hydro LLC	1	22.8 MW
Eagle Creek Renewable Energy, LLC	2	16.3 MW
Altus Power America Management, LLC	3	15 MW