Encogen — United States of America
Gas power plant in Washington, United States of America. Approximate location 48.746, -122.486.
GasWashingtonUnited States of AmericaCCGT · HRSGCO₂ measured
Encogen is a 176.4 MW gas power station in Washington, United States of America. It is operated by Puget Sound Energy Inc. Based on reported annual generation of 401 GWh, it can supply roughly 115k homes. It ranks #2098 of 10,884 United States of America power plants by installed capacity. Commissioned in 1993, it is around 33 years old — long-established. Its annual emissions of 427,032 t CO₂/yr (US EPA GHGRP) are equivalent to about 100k cars driven for a year. In context, gas supplies about 40.0% of United States of America's electricity; the national grid averages 384 gCO₂/kWh (43.0% low-carbon) (2025).
Plant data: WRI Global Power Plant Database (CC BY 4.0), id USA0007870.
Data status
Known data
Calculated from dataset
Known, modelled and calculated values are kept separate. Missing fields are shown as unavailable.
Data provenance
Source of the capacity and fuel values:
capacity: GEM · 2026 · L100000402239; fuel: WRI GPPD
In context: how this plant compares
At 176.4 MW, Encogen is well above the median gas plant in United States of America (121.2 MW). Technically it is described as CCGT; combined-cycle with a heat-recovery steam generator (HRSG). Gas plants burn natural gas either in open-cycle turbines for fast peaking, or in combined-cycle units that recover exhaust heat in an HRSG to reach roughly 55–62% efficiency — the cleanest-burning fossil option.
Capacity comparison computed from the WRI Global Power Plant Database; fuel-type context is general engineering background.
427,032 t CO₂/yr — in everyday terms
This facility's annual emissions are roughly equivalent to:
Equivalencies via US EPA Greenhouse Gas Equivalencies; emissions per US EPA GHGRP (measured for US EPA/EU ETS, modelled for Climate TRACE).
Key facts
- Load factor
- 26%, from 401 GWh of reported generation, in line with the 26% median for 1622 gas plants in United States of America
- Generation trend
- 284 GWh in 2013 and 401 GWh in 2019 (+42%)
- Highest and lowest year
- 2019: 401 GWh; 2018: 200 GWh
- Share of United States of America gas capacity
- less than 0.1% of 789,950 MW across 2,165 plants in this dataset
- Age among peers
- 643 of 1,973 dated gas plants in United States of America are older
Calculated from the capacity and generation records in this dataset (WRI Global Power Plant Database (CC BY 4.0)).
Reported generation trend
Annual generation (GWh), WRI Global Power Plant Database (CC BY 4.0).
Owner
Operated by Puget Sound Energy Inc. All plants by this company →
Local climate & thermal context
This gas plant burns natural gas in a turbine — often in a combined-cycle setup — to generate electricity. It sits in a temperate oceanic climate (Köppen Cfb) — Northern Hemisphere, latitude 48.7°N — which shapes how much energy it can produce and how its output varies through the year.
Monthly mean temperature
Heating degree-days here run 19% above the median power plant in this dataset — a proxy for how much extra energy heated equipment must replace through its surfaces in winter.
Climate heat-demand index: 61/100 — this site sits in the mid third of the power plants we cover by heating degree-days.
A gas turbine here also runs ~0% below its ISO (15°C) rating at this annual mean (typical CCGT curve, estimate).
Climate normals: WorldClim 2.1 (1970–2000 monthly normals, 10 arc-min, CC BY 4.0); zone: Köppen-Geiger world climate classification (Kottek et al. 2006, 0.5° grid). Degree-days & heat-demand index computed by PowerAtlas — a modelled heat-demand proxy, not a measured site figure.
Site climate & environmental severity
This site sits in a mild atmospheric environment (estimated ISO 9223 class C2 — Low), with humidity / wetness the leading environmental stress.
Indicative estimate via the ISO 9223:2012 informative method (atmospheric corrosivity from temperature, time-of-wetness and airborne salinity), using WorldClim climate normals, the Köppen-Geiger class and coast distance. Indicative, not a measured corrosion rate.
How it compares & nearby plants
The #952 largest gas power plant of 2165 in United States of America by capacity.
United States of America has 2165 gas power plants in this dataset, together about 789,950 MW of capacity.
Nearby power plants
- Ferndale Generating Station · Gas · 285.5 MW · Washington
- Whitehorn · Gas · 170 MW · Washington
- March Point Cogeneration · Gas · 139.8 MW · Washington
- HF Sinclair Puget Sound Refining · Gas · 139.8 MW · Washington
- Sumas Power Plant · Gas · 125.5 MW · Washington
- Fredonia · Gas · 376 MW · Washington
Location
Coordinates 48.746, -122.486 from WRI Global Power Plant Database (CC BY 4.0). View on OpenStreetMap.
Frequently asked questions
What type of power plant is Encogen?
Encogen is a 176.4 MW gas power plant in Washington, United States of America, commissioned in 1993.
How much electricity does Encogen generate?
Encogen generates about 401 GWh of electricity per year.
Who operates Encogen?
Encogen is operated by Puget Sound Energy Inc.
How much CO₂ does Encogen emit?
Encogen has measured emissions of about 427,032 tonnes of CO₂ per year (US EPA GHGRP).