How many biomass power plants are in Washington?

13, with 291 MW of nameplate capacity between them, spread over 10 counties. That is the EIA-860M operating count for 2026-07.

Is there a map of Washington biomass power plants?

Yes — the map above. Each dot is one biomass power plant, sized by nameplate capacity and placed at the coordinates EIA files for it.

Which is the largest biomass power plant in Washington?

Nippon Dynawave Packaging Longview WA, at 62 MW. The table is sorted largest first, so the rest follow it.

Is there a biomass power plant near me in Washington?

The county roll-up below groups every plant by county, which is the quickest way to find the one closest to a given town.

Which grid operator runs Washington's biomass power plants?

No single ISO or RTO covers most of them. EIA files each plant against its own balancing authority, which in Washington is largely a vertically integrated utility rather than an organised market.

How current is this, and what is left out?

EIA-860M for 2026-07. Wood and wood waste, landfill gas, municipal solid waste and other waste biomass. Plants below 1 MW are not surveyed by EIA and so are absent; retirements and additions after 2026-07 arrive with the next monthly release.

Biomass Power Plants in Washington

Every operating biomass power plant in Washington on EIA-860M for 2026-07: 13 plants, 39 generating units and 291 MW of nameplate capacity across 10 counties.

As of 2026-07 (inventory dated 2026-07-31) · EIA-860M Preliminary Monthly Electric Generator Inventory · eia.gov/…/july_generator2026.xlsx · eia.gov/…/eia860m

Plants: 13; 39 generating units
Nameplate capacity: 291 MW
Counties: 10
Grid operator: Mixed; no single ISO covers a majority

Map of biomass power plants in Washington

Every one of the 13 plants is drawn at the coordinate EIA files for it.

Loading map…

Biomass · 13

List of biomass power plants in Washington

Sort by any column. Capacity is nameplate, summed across every generating unit EIA lists at the site.

biomass power plants in Washington

Nippon Dynawave Packaging Longview WAWood/Wood Waste Biomass	Nippon Dynawave Packaging Co.	Cowlitz	62.4	4	1948	Operating
Kettle Falls Generating Station2 technologies	Avista Corp	Stevens	57.9	2	1983	Operating
Longview FibreWood/Wood Waste Biomass	Longview Fibre Co	Cowlitz	45	2	1958	Operating
Sierra Pacific Burlington FacilityWood/Wood Waste Biomass	Sierra Pacific Industries	Skagit	28	1	2007	Operating
Spokane Waste to EnergyMunicipal Solid Waste	City of Spokane - (WA)	Spokane	26	1	1991	Operating
Sierra Pacific AberdeenWood/Wood Waste Biomass	Sierra Pacific Industries	Grays Harbor	18	1	2003	Operating
Cosmo Specialty Fibers PlantWood/Wood Waste Biomass	Cosmo Specialty Fibers	Grays Harbor	15	2	1957	Out of service but expected to return to service in next calendar year
McKinley Paper Co. - Washington MillWood/Wood Waste Biomass	McKinley Paper Co. - Washington Mill	Clallam	12.6	1	2022	Out of service but expected to return to service in next calendar year
Port Townsend PaperWood/Wood Waste Biomass	Port Townsend Paper Co	Jefferson	7.5	1	1986	Operating
Cedar HillsLandfill Gas	King County Solid Waste Division	King	5.4	18	2009	Operating
West Point Treatment PlantOther Waste Biomass	King County Dept-Natural Res - (WA)	King	4.6	2	2012	Operating
DarringtonWood/Wood Waste Biomass	Hampton Lumber Mills - Washington Inc	Snohomish	4.5	1	2007	Operating
LRI LFGTE FacilityLandfill Gas	Frontier Operation Services	Pierce	4.5	3	2013	Operating

Largest biomass power plants in Washington

1Nippon Dynawave Packaging Longview WACowlitz County, Washington62.4 MW
2Kettle Falls Generating StationStevens County, Washington57.9 MW
3Longview FibreCowlitz County, Washington45 MW
4Sierra Pacific Burlington FacilitySkagit County, Washington28 MW
5Spokane Waste to EnergySpokane County, Washington26 MW
6Sierra Pacific AberdeenGrays Harbor County, Washington18 MW
7Cosmo Specialty Fibers PlantGrays Harbor County, Washington15 MW
8McKinley Paper Co. - Washington MillClallam County, Washington12.6 MW
9Port Townsend PaperJefferson County, Washington7.5 MW
10Cedar HillsKing County, Washington5.4 MW

Biomass power plants by county in Washington

The county EIA files against each plant. It is the fastest way to find the plant nearest a given town.

County	Plants	Nameplate MW
Cowlitz	2	107.4
Stevens	1	57.9
Grays Harbor	2	33
Skagit	1	28
Spokane	1	26
Clallam	1	12.6
King	2	10
Jefferson	1	7.5
Pierce	1	4.5
Snohomish	1	4.5

Biomass Power Plants in Washington: FAQ

How many biomass power plants are in Washington?: 13, with 291 MW of nameplate capacity between them, spread over 10 counties. That is the EIA-860M operating count for 2026-07.
Is there a map of Washington biomass power plants?: Yes — the map above. Each dot is one biomass power plant, sized by nameplate capacity and placed at the coordinates EIA files for it.
Which is the largest biomass power plant in Washington?: Nippon Dynawave Packaging Longview WA, at 62 MW. The table is sorted largest first, so the rest follow it.
Is there a biomass power plant near me in Washington?: The county roll-up below groups every plant by county, which is the quickest way to find the one closest to a given town.
Which grid operator runs Washington's biomass power plants?: No single ISO or RTO covers most of them. EIA files each plant against its own balancing authority, which in Washington is largely a vertically integrated utility rather than an organised market.
How current is this, and what is left out?: EIA-860M for 2026-07. Wood and wood waste, landfill gas, municipal solid waste and other waste biomass. Plants below 1 MW are not surveyed by EIA and so are absent; retirements and additions after 2026-07 arrive with the next monthly release.