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950 MW Hydro operating in Grant, WA
950 MW
Nameplate Capacity
10
Generators
units
Conventional Hydroelectric
Technology
1959
Operating Since
Coordinates
46.6451, -119.9080
County
Grant, WA
Nearby Plants
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Owner data does not fully agree across sources.
EIA typically reports the operating utility, while GEM resolves to the financial owner or parent corporation. Both can be correct.
| Field | EIA | GEM | Wikidata |
|---|---|---|---|
| Operator | PUD No 2 of Grant County - (WA) | Grant County Public Utility District | — |
| Owner(s) | PUD No 2 of Grant County | Grant County Public Utility District | — |
| Status | Operating | operating | — |
GEM identifies the owner as Grant County Public Utility District
This entity is not yet in the GEM ownership database — chain unavailable.
Priest Rapids Dam is a hydroelectric, concrete gravity dam; located on the Columbia River, between the Yakima Firing Range and the Hanford Nuclear Reservation, and bridges Yakima County and Grant County, in the U.S. state of Washington. The dam is 24 miles south of the town of Vantage, and 47 miles northwest of the city of Richland. It is located at mile marker 397.1 from the mouth of the Columbia. It is owned by the Grant County Public Utility District (PUD). Priest Rapids, for which the dam was named, are now submerged beneath the dam's reservoir.
Read more on WikipediaPriest Rapids is a 950 MW hydroelectric power plant located in Grant County, Washington. The plant began operating in 1959 and utilizes conventional hydroelectric technology. It consists of 10 generators and is owned and operated by PUD No 2 of Grant County. The primary fuel source for electricity generation is water (WAT).
In the most recent year of available data, Priest Rapids generated 4,164,860 MWh of electricity, achieving a capacity factor of 50.0%. The plant is connected to the grid within the Bonneville Power Administration balancing authority and the Western Electricity Coordinating Council (WECC) NERC region. Priest Rapids ranks as the 6th largest power plant out of 23 in Washington state, and 25th out of 194 hydroelectric plants nationally.
Generated from EIA, GEM, and public data sources
Grid Region
Pacific Northwest
Market
WEIM Participant
NERC Region
WECC — Western Electricity Coordinating Council
Balancing Authority
Bonneville Power Administration (BPAT)
Grid Voltage
230.0 kV
Regulatory Status
RE — Regulated
Entity Type
Political Subdivision
Sector
Electric Utility
Monthly net generation as reported to EIA-923 — useful for historical context. Confidence varies sharply by fuel type; the band above and the “About this data” button explain the caveats specific to this plant and how InfraSure’s in-house model handles them.
504.6K MWh
Latest Month
4.2M MWh
Annual Generation
50.0%
Capacity Factor
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2013
$2,294/kW
Est. Construction Cost
Total estimated cost: $2.2B
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This plant's balancing authority participates in CAISO's Western Energy Imbalance Market (WEIM). Direct nodal pricing data is not yet available.
No wholesale contracts disclosed in FERC EQR for this plant.
FERC EQR captures bilateral wholesale energy + capacity contracts ≥$1M/yr filed quarterly by jurisdictional sellers — covers renewable PPAs, thermal energy sales agreements, capacity contracts, and tolling agreements alike. Many plants don't appear: regulated-utility output flows to ratepayers via cost-of-service rather than bilateral contracts; small projects fall below the filing threshold; tax-equity-financed renewables route offtake to investors not utilities; merchant plants sell into ISO clearing markets without bilateral contracts. News-extracted buyer facts (below) may surface contracts disclosed only through announcements.
Last updated 2026-04-19
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Mineral oil spilled from Priest Rapids Dam into the Columbia River; state and federal agencies launched an investigation and cleanup concluded by late December 2025.