Editing Puget Sound Energy (section)

== Facilities ==

PSE's electric supplies include utility-owned resources as well as those under long-term contract, for a total capacity of 5,044 [[megawatts]] (MW), of which 3,597 MW is PSE-owned generating capacity.<ref>[https://pse.com/aboutpse/PseNewsroom/MediaKit/020_About_PSE_web.pdf Factsheet], About PSE</ref>

PSE owns coal, hydroelectric, natural gas and wind power-generating facilities, with more than 3,500&nbsp;MW of capacity. In 2018, PSE's generation was 36% coal, 32% hydroelectric, 20% natural gas, and 10% wind derived. Less than one percent originated from other [[efficient energy use|energy efficiency]] programs.<ref name=":0">{{Cite web|url=https://www.pse.com/pages/energy-supply/electric-supply|title=Electricity Supply|website=pse.com|language=en-us|access-date=2020-08-30}}</ref>

Coal accounted for 36% of PSE's electricity fuel mix in 2018.<ref name=":0" /> PSE's partial ownership of Eastern Montana's [[Colstrip, Montana|Colstrip]] Generating Station represents the single largest power-generating facility PSE owns, approximately 700&nbsp;MW of generating capacity. In 2010, the Colstrip Generating station was the 8th largest greenhouse gas emitter among power plants in the United States.<ref>U.S. EPA ghgdata, [http://ghgdata.epa.gov/ghgp/main.do#/treeSector/?q=Facility%20or%20Location&st=&fid=&lowE=15400000&highE=23000000&&g1=1&g2=1&g3=1&g4=1&g5=1&g6=1&g7=1&s1=1&s2=0&s3=0&s4=0&s5=0&s6=0&s7=0&s8=0&s9=0&s301=1&s302=1&s303=1&s304=1&s305=1&s306=1&s401=1&s402=1&s403=1&s404=1&s601=1&s602=1&s701=1&s702=1&s703=1&s704=1&s705=1&s706=1&s707=1&s708=1&s709=1&s710=1&s711=1&s801=1&s802=1&s803=1&s804=1&s805=1&s901=1&s902=1&s903=1&s904=1&s905=1&ss=&so=0&ds=E&yr=2010 2010 Greenhouse Gas Emissions from Large Facilities], 2010</ref> In 2019, the Washington Clean Energy Transformation Act mandated that all power utilities remove coal from their generation mix, including "coal by wire" from out of state. As of May 2024, PSE has proactively removed coal from its portfolio by choosing not to purchase energy generated from the Colstrip plant.<ref>{{Cite web |title=Grid Status |url=https://www.gridstatus.io/eia/PSEI?date=2024-01-01to2024-05-28 |access-date=2024-05-30 |website=www.gridstatus.io |language=en}}</ref> It intends to sell its 25% stake in the Colstrip plant, but plans to do so have repeatedly fallen through.<ref>{{Cite web |last=Ernst |first=Steve |date=2024-05-10 |title=PSE Deal to Unload Last Shares of Colstrip Collapses |url=https://www.newsdata.com/clearing_up/pse-deal-to-unload-last-shares-of-colstrip-collapses/article_74b2ca88-0e31-11ef-856f-539c333faadf.html |access-date=2024-05-30 |website=NewsData, LLC |language=en}}</ref>

Hydroelectricity generated 31% of PSE's power supply in 2016.<ref>[http://www.commerce.wa.gov/Documents/Fuel%20Mix%202010%20compiled%20reports.pdf  State of Washington Department of Commerce, 2010 Electric Utility Fuel Mix Disclosure Report] {{webarchive|url=https://web.archive.org/web/20130620193831/http://www.commerce.wa.gov/Documents/Fuel%20Mix%202010%20compiled%20reports.pdf |date=2013-06-20 }}</ref> The company operates three hydroelectric facilities:

* The Baker River Hydroelectric Project on the [[Baker River (Washington)|Baker River]], generating 170&nbsp;MW of electricity.
* [[Snoqualmie Falls Hydroelectric Plant]], two power plants on the [[Snoqualmie River]] in King County, generating 44&nbsp;MW.
* The [[Electron Hydroelectric Project]] on the [[Puyallup River]] in Pierce County generates 22&nbsp;MW of electricity.<ref>[http://pse.com/inyourcommunity/pierce/Pages/Electron-Hydro.aspx Electron Hydroelectric Project] {{webarchive|url=https://web.archive.org/web/20121117192858/http://pse.com/inyourcommunity/pierce/Pages/Electron-Hydro.aspx |date=2012-11-17 }}, Puget Sound Energy</ref>

Natural gas-fired power generation accounted for 22% of the utility's electricity fuel mix in 2016.<ref name=":0" /> The company operates these natural gas-fired facilities:

* The Sumas Generating Station in Whatcom County is a cogeneration natural gas-fired plant capable of generating 125&nbsp;MW of electricity.<ref>{{Cite web|url=https://www.pse.com/-/media/PDFs/001-Energy-Supply/007-Thermal-Power/4153_065_wb_Sumas_dcg.pdf|title=Sumas Generating Station|website=Puget Sound Energy}}</ref>
* The Ferndale Generating Station in Whatcom County is a combined-cycle natural gas-fired plant capable of generating 270&nbsp;MW of electricity.<ref>{{Cite web|url=https://www.pse.com/-/media/PDFs/001-Energy-Supply/007-Thermal-Power/4153_097_wb_Ferndale_dcg.pdf|title=Ferndale Generating Station|website=Puget Sound Energy}}</ref>
* The Encogen Generating Station in Whatcom County is a combined-cycle natural gas-fired plant capable of generating 167&nbsp;MW of electricity.<ref>{{Cite web|url=https://www.pse.com/-/media/PDFs/001-Energy-Supply/007-Thermal-Power/4153_055_wb_Encogen_dcg.pdf|title=Encogen Generating Station|website=Puget Sound Energy}}</ref>
* The Goldendale Generating Station in Klickitat County is a combined-cycle natural gas-fired plant capable of generating 277&nbsp;MW of electricity.<ref>{{Cite web|url=https://www.pse.com/-/media/PDFs/001-Energy-Supply/007-Thermal-Power/4153_066_wb_Goldendale_dcg.pdf|title=Goldendale Generating Station|website=Puget Sound Energy}}</ref>
* The Mint Farm Generating Station in Cowlitz County is a combined-cycle natural-gas-fired plant capable of generating 310&nbsp;MW of electricity.<ref>{{Cite web|url=https://www.pse.com/-/media/PDFs/001-Energy-Supply/007-Thermal-Power/4153_053_wb_Mint-Farm_dcg.pdf|title=Mint Farm Generating Station|website=Puget Sound Energy}}</ref>
* The Fredonia Generating Station in Skagit County is a simple-cycle natural gas-fired plant capable of generating 316&nbsp;MW of electricity.<ref>{{Cite web|url=https://www.pse.com/-/media/PDFs/001-Energy-Supply/007-Thermal-Power/4153_047_wb_Fredonia_dcg.pdf|title=Fredonia Generating Station|website=Puget Sound Energy}}</ref>
* The Frederickson Generating Station in Pierce County is a simple-cycle natural gas-fired plant capable of generating 147&nbsp;MW of electricity.<ref>{{Cite web|url=https://www.pse.com/-/media/PDFs/001-Energy-Supply/007-Thermal-Power/4153_067_wb_Frederickson_dcg.pdf|title=Frederickson Generating Stations|website=Puget Sound Energy}}</ref> 
* The Frederickson 1 Generating Station in Pierce County is a combined-cycle natural gas-fired plant capable of generating 275&nbsp;MW of electricity.  PSE owns a 50% share, or 137&nbsp;MW.<ref>{{Cite web|url=https://www.pse.com/-/media/PDFs/001-Energy-Supply/007-Thermal-Power/4153_067_wb_Frederickson_dcg.pdf|title=Frederickson Generating Stations|website=Puget Sound Energy}}</ref> 
* The [[Whitehorn Generating Station]] in Whatcom County is a simple-cycle natural gas-fired plant capable of generating 147&nbsp;MW of electricity.

Wind power and other generation sources, such as biomass and [[landfill gas]], account for 1% of the utility's electricity fuel mix.<ref>[http://www.commerce.wa.gov/Documents/Fuel%20Mix%202010%20compiled%20reports.pdf  State of Washington Department of Commerce, 2010 Electric Utility Fuel Mix Disclosure Report] {{webarchive|url=https://web.archive.org/web/20130620193831/http://www.commerce.wa.gov/Documents/Fuel%20Mix%202010%20compiled%20reports.pdf |date=2013-06-20 }}</ref> PSE owns and operates these wind-power facilities:

* The Hopkins Ridge Wind Facility in southeast Washington's [[Columbia County, Washington|Columbia County]] began commercial production in 2005. Hopkins Ridge's 87 wind turbines have the capacity to generate 157&nbsp;MW of electricity.
* The [[Wild Horse Wind Farm|Wild Horse Wind and Solar Facility]] in central Washington's Kittitas County began production in 2006 and was expanded to include 22 turbines in 2009. Wild Horse's 149 wind turbines have the capacity to generate 273&nbsp;MW of electricity.
* In 2012, the first phase of the [[Lower Snake River Wind Project]] began in Southeast Washington's Garfield County. Lower Snaker River Phase 1's 149 turbines have the capacity to generate 343&nbsp;MW of electricity.

Coal-fired power is a major contributor to PSe's fuel mix at 36% of PSE's 2018 [[electricity generation]] sources, the largest share in 2018. The company owns a stake of the Colstrip Unit 3 coal power plant in eastern Montana.<ref>{{cite web | url=https://www.pse.com/pages/energy-supply/thermal-power | title= Thermal Power}}</ref>

A [[net metering]] program allows residential and business customers to return extra renewable energy solar power to the grid. An additional approximately 1% per year of generation comes from—or actually is reduced by—state mandated [[I-937]] energy efficiency programs, adding an average 25 additional "[[Negawatts]]" generation capacity per year.

For its natural gas service to customers, PSE purchases a portfolio of natural gas supplies originating in western Canada and the U.S. Rocky Mountain states.