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). While PSE-owned generating capacity is at 3,597 MW.[2]
PSE owns coal, hydroelectric, natural gas and wind power-generating facilities, with more than 3,500MW 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 energy efficiency programs.[3]
Coal accounted for 36% of PSE's electricity fuel mix in 2018.[3] PSE's partial ownership of Eastern Montana's Colstrip Generating Station represents the single largest power-generating facility PSE owns, approximately 700MW of generating capacity. In 2010, the Colstrip Generating station was the 8th largest greenhouse gas emitter among power plants in the United States.[4]
Hydroelectricity generated 31% of PSE's power supply in 2016.[5] The company operates three hydroelectric facilities:
The Baker River Hydroelectric Project on the Baker River, generating 170MW of electricity.
Natural gas-fired power generation accounted for 22% of the utility's electricity fuel mix in 2016.[3] 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 125MW of electricity.[7]
The Ferndale Generating Station in Whatcom County is a combined-cycle natural gas-fired plant capable of generating 270MW of electricity.[8]
The Encogen Generating Station in Whatcom County is a combined-cycle natural gas-fired plant capable of generating 167MW of electricity.[9]
The Goldendale Generating Station in Klickitat County is a combined-cycle natural gas-fired plant capable of generating 277MW of electricity.[10]
The Mint Farm Generating Station in Cowlitz County is a combined-cycle natural-gas-fired plant capable of generating 310MW of electricity.[11]
The Fredonia Generating Station in Skagit County is a simple-cycle natural gas-fired plant capable of generating 316MW of electricity.[12]
The Frederickson Generating Station in Pierce County is a simple-cycle natural gas-fired plant capable of generating 147MW of electricity.[13]
The Frederickson 1 Generating Station in Pierce County is a combined-cycle natural gas-fired plant capable of generating 275MW of electricity. PSE owns a 50% share, or 137MW.[14]
The Whitehorn Generating Station in Whatcom County is a simple-cycle natural gas-fired plant capable of generating 147MW of electricity.
Wind power and other generation sources, such as biomass and landfill gas, account for 1% of the utility's electricity fuel mix.[15] PSE owns and operates these wind-power facilities:
The Hopkins Ridge Wind Facility in southeast Washington's Columbia County began commercial production in 2005. Hopkins Ridge's 87 wind turbines have the capacity to generate 157MW of electricity.
The 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 273MW 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 343MW 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.[16]
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.
The PSE began construction on the controversial Energize Eastside power line project in 2020.
History
PSE was formed in 1997 when two of its largest ancestral companies – Puget Sound Power & Light Company and Washington Energy Company – merged.[17]
In 2009 Puget Sound Energy was sold to foreign investors led by Macquarie Group,[18] in a leveraged private equity buyout. Puget Holdings, the U.S. title of this group of long-term infrastructure investors, merged with Puget Energy, PSE's parent company to form the current business structure. Puget Energy is a holding company incorporated in the State of Washington. All of its operations are conducted through its utility subsidiary, PSE, which is regulated by Washington Utilities and Transportation Commission.
Puget Sound Energy rates show a typical residential electrical bill (at 1000 kwh per month) of $102.56 and typical a gas bill (at 68 therms per month) of $86.[20] In 2018, PSE reported total carbon-dioxide-equivalent emissions of 10,512,364 metric tons due to electricity operations and 4,989,403 metric tons due to natural gas operations, which equate to 9 and 6 metric tons per customer respectively. PSE figures emissions of 0.169 metric tons per user according to EPA GHG MRR Subpart DD.[21]
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