Where is Rock Island?

In Chelan County, Washington (WA). The map on this page is placed at the coordinates EIA files for the plant, which locate the site rather than any individual unit.

How big is Rock Island?

629 MW of nameplate capacity across 19 units, as of the EIA-860M release for 2026-07.

Who owns Rock Island?

EIA-860M names PUD No 1 of Chelan County - (WA) as the reporting entity. That is the operator of record on the survey, which is not always the ultimate owner.

Is this the same as Rock Island LLC?

Probably, but EIA-860M does not say. The survey records a plant name and a reporting entity — PUD No 1 of Chelan County - (WA) here — not the project company that holds the asset. Project companies are commonly registered as an LLC carrying the plant's name, so a search for "Rock Island LLC" usually means this site. This page shows only what EIA files, and does not assert a corporate structure it cannot see.

Is Rock Island still running?

EIA-860M files it as "Operating" for 2026-07. Statuses change monthly, and this page follows the monthly release.

Rock Island

Rock Island is a 629 MW hydroelectric power plant in Chelan County, Washington, operated by PUD No 1 of Chelan County - (WA). EIA-860M lists 19 generating units here. Its units entered service between 1931 and 1979.

As of 2026-07 (inventory dated 2026-07-31) · EIA-860M Preliminary Monthly Electric Generator Inventory · eia.gov/…/july_generator2026.xlsx · eia.gov/…/eia860m

Nameplate capacity: 629.4 MW; 503.2 MW net summer
Generating units: 19
In service: 1931–1979
EIA plant ID: 6200

Where it is

Loading map…

County: Chelan County, Washington
Coordinates: 47.3461, -120.0917
Balancing authority: CHPD
Sector: Electric Utility

Units, technology and status

Operator of record: PUD No 1 of Chelan County - (WA)
Primary energy source: Hydro
Technologies: Conventional Hydroelectric
Status: Operating (15) · Out of service and NOT expected to return to service in next calendar year (4)

Every plant PUD No 1 of Chelan County - (WA) reports to EIA →

Rock Island: FAQ

Where is Rock Island?: In Chelan County, Washington (WA). The map on this page is placed at the coordinates EIA files for the plant, which locate the site rather than any individual unit.
How big is Rock Island?: 629 MW of nameplate capacity across 19 units, as of the EIA-860M release for 2026-07.
Who owns Rock Island?: EIA-860M names PUD No 1 of Chelan County - (WA) as the reporting entity. That is the operator of record on the survey, which is not always the ultimate owner.
Is this the same as Rock Island LLC?: Probably, but EIA-860M does not say. The survey records a plant name and a reporting entity — PUD No 1 of Chelan County - (WA) here — not the project company that holds the asset. Project companies are commonly registered as an LLC carrying the plant's name, so a search for "Rock Island LLC" usually means this site. This page shows only what EIA files, and does not assert a corporate structure it cannot see.
Is Rock Island still running?: EIA-860M files it as "Operating" for 2026-07. Statuses change monthly, and this page follows the monthly release.