Ross — Plant Summary
- EIA Plant ID
- 6202
- Capacity
- 450 MW
- Primary Fuel
- Hydro
- Technology
- Conventional Hydroelectric
- Status
- Operating
- Location
- Whatcom, WA
- Operating Since
- 1952
- Generators
- 4
- Operator
- City of Seattle - (WA)
- Parent Company
- —
- Annual Generation
- 531,608 MWh
- Capacity Factor
- 13.5%
- Balancing Authority
- Seattle City Light
- ISO/RTO
- —
- NERC Region
- WECC
Ross
OperatingHydro
Ranked #13 of 75 Hydro plants in WA#53 of 1454 nationally
450 MW Hydro operating in Whatcom, WA — Seattle City Light
EIAGEMWD
450 MW
Nameplate Capacity
4
Generators
units
Conventional Hydroelectric
Technology
1952
Operating Since
Location
Ownership & Operator
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 [100%] | — |
| Status | Operating | operating | — |
Ownership Chain
GEM identifies the owner as Seattle City Light [100%]
This entity is not yet in the GEM ownership database — chain unavailable.
About
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
Engineering & Generators
Grid Context
NERC Region
WECC
Balancing Authority
Seattle City Light
Grid Voltage
230 kV
Regulatory Status
RE
Entity Type
Municipal
Sector
Electric Utility
Generation
168.0K MWh
Latest Month
531.6K MWh
Annual Generation
13.5%
Capacity Factor
Jan 2023 – Dec 2025
Financial Data
No financial data available for this plant.
Pricing & Market Data
Market Position
LMP Node
ROSS_SCL_2_GEN41GNODE
Pricing Hub
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