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450 MW Hydro operating in Whatcom, WA — Seattle City Light
450 MW
Nameplate Capacity
4
Generators
units
Conventional Hydroelectric
Technology
1952
Operating Since
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 | City of Seattle - (WA) | Seattle City Light | — |
| Owner(s) | City of Seattle - (WA) | Seattle City Light | — |
| Status | Operating | operating | — |
GEM identifies the owner as Seattle City Light
This entity is not yet in the GEM ownership database — chain unavailable.
Ross Dam is a 540-foot (160 m)-high, 1,300-foot (400 m)-long concrete thin arch dam across the Skagit River, forming Ross Lake. The dam is in Washington state, while Ross Lake extends 23 miles (37 km) north to British Columbia, Canada. Both dam and reservoir are located in Ross Lake National Recreation Area, is bordered on both sides by Stephen Mather Wilderness and combined with Lake Chelan National Recreation Area they make up North Cascades National Park Complex.
Read more on WikipediaThe Ross Power Plant, located in Whatcom County, Washington, is a 450 MW conventional hydroelectric facility. It began operating in 1952 and consists of 4 generators. The plant's primary fuel source is water (WAT). It is owned and operated by the City of Seattle - (WA). Ross ranks as the 13th largest power plant in Washington out of 23, and 53rd nationally out of 194 plants.
In the latest year of reported data, Ross generated 531,608 MWh of electricity, achieving a capacity factor of 13.5%. The plant operates within the Western Electricity Coordinating Council (WECC) NERC region, and its balancing authority is Seattle City Light.
Generated from EIA, GEM, and public data sources
Grid Region
Pacific Northwest
Market
WEIM Participant
NERC Region
WECC — Western Electricity Coordinating Council
Balancing Authority
168.0K MWh
Latest Month
531.6K MWh
Annual Generation
13.5%
Capacity Factor
2013
$2,294/kW
Est. Construction Cost
Total estimated cost: $1.0B
Market Position
LMP Node
ROSS_SCL_2_GEN41GNODE
Pricing Hub
—
Last updated 2026-03-26
View all articlesNo ask pi reports yet for this entity.
ask pi about RossSeattle City Light (SCL)
Grid Voltage
230.0 kV
Regulatory Status
RE — Regulated
Entity Type
Municipal
Sector
Electric Utility