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2456.2 MW Hydro operating in Douglas, WA
2,456.2 MW
Nameplate Capacity
27
Generators
units
Conventional Hydroelectric
Technology
1955
Operating Since
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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 | USACE Northwestern Division | US Army Corps of Engineers - Seattle District | — |
| Owner(s) | USACE Northwestern Division | US Army Corps of Engineers - Seattle District | — |
| Status | Operating | operating | — |
GEM identifies the owner as US Army Corps of Engineers - Seattle District
This entity is not yet in the GEM ownership database — chain unavailable.
The Chief Joseph Dam is a concrete gravity dam on the Columbia River, 2.4 km (1.5 mi) upriver from Bridgeport, Washington. The dam is 877 km (545 mi) upriver from the mouth of the Columbia at Astoria, Oregon. It is operated by the USACE Chief Joseph Dam Project Office and the electricity is marketed by the Bonneville Power Administration.
Read more on WikipediaChief Joseph Dam is a hydroelectric power plant located in Douglas County, Washington. The plant has a total capacity of 2456.2 MW across 27 generators, making it the second-largest power plant in Washington state (out of 23) and the third-largest hydroelectric plant nationally (out of 194). It is operated by the USACE Northwestern Division. The plant began operating in 1955, utilizing conventional hydroelectric technology with water as its primary fuel source.
In the most recent year with available data, Chief Joseph generated 9,806,156 MWh of electricity, achieving a capacity factor of 45.5%. The plant operates within the Western Electricity Coordinating Council (WECC) NERC region and is under the balancing authority of the Bonneville Power Administration.
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
500.0 kV
Regulatory Status
RE — Regulated
Entity Type
Federal
Sector
Electric Utility
Historic generation and capacity factor for this asset — the foundation for forward forecasts on the InfraSure platform.
1.0M MWh
Latest Month
9.8M MWh
Annual Generation
45.5%
Capacity Factor
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2013
$2,294/kW
Est. Construction Cost
Total estimated cost: $5.6B
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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.
Last updated 2026-03-26
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