Snoqualmie — Plant Summary
- EIA Plant ID
- 3860
- Capacity
- 12.8 MW
- Primary Fuel
- Hydro
- Technology
- Conventional Hydroelectric
- Status
- Operating
- Location
- King, WA
- Operating Since
- 1898
- Generators
- 5
- Operator
- Puget Sound Energy Inc
- Parent Company
- PUGET HOLDINGS
- Annual Generation
- 65,857 MWh
- Capacity Factor
- 58.5%
- Balancing Authority
- Puget Sound Energy
- ISO/RTO
- —
- NERC Region
- WECC
Snoqualmie
OperatingHydro
Ranked #48 of 75 Hydro plants in WA#583 of 1454 nationally
12.8 MW Hydro operating in King, WA — Puget Sound Energy
EIAWD
12.8 MW
Nameplate Capacity
5
Generators
units
Conventional Hydroelectric
Technology
1898
Operating Since
Location
Coordinates
47.5401, -121.8370
County
King, WA
Nearby Plants
- Snoqualmie 2Hydro38.7 MW · 0.6 km
- Black CreekHydro3.7 MW · 9.6 km
- Hancock Creek Hydroelectric ProjectHydro6 MW · 11.6 km
Ownership & Operator
| Field | EIA | GEM | Wikidata |
|---|---|---|---|
| Operator | Puget Sound Energy Inc | Puget Sound Energy | — |
| Owner(s) | Puget Sound Energy Inc | PUGET HOLDINGS | — |
| Status | Operating | — | — |
Ownership Chain
About
The Snoqualmie hydroelectric plant, located in King County, Washington, has a total capacity of 12.8 MW across 5 generators. The plant began operating in 1898 and is owned by Puget Holdings and operated by Puget Sound Energy Inc. The primary fuel source is water (WAT), and the plant utilizes conventional hydroelectric technology. Snoqualmie ranks as the 47th largest power plant in Washington out of 75, and 595th nationally out of 1464 plants.
In the most recent year with available data, the plant generated 65,857 MWh, achieving a capacity factor of 58.5%. The plant operates within the Western Electricity Coordinating Council (WECC) NERC region, and its balancing authority is Puget Sound Energy. Financial data indicates an installed cost of $6,280.35 per kW.
Generated from EIA, GEM, and public data sources
Engineering & Generators
Grid Context
NERC Region
WECC
Balancing Authority
Puget Sound Energy
Grid Voltage
115 kV
Regulatory Status
RE
Entity Type
Investor-Owned Utility
Sector
Electric Utility
Generation
6.9K MWh
Latest Month
65.9K MWh
Annual Generation
58.5%
Capacity Factor
Jan 2022 – Dec 2024
Financial DataBeta
Source: FERC Form 1HIGH
$6,316/kW
Installed Cost
$18.7/MWh
Operating Cost
Puget Sound Energy, Inc.
Reporting Utility
Cumulative Installed Cost
Per-Unit Cost Trends
Pricing & Market Data
This plant is outside organized wholesale electricity markets (ISOs/RTOs). Nodal pricing data is not available.
News & Articles (10)Beta
Hazards·ice storm
Seattle weather updates: Snoqualmie Pass, Sea-Tac airport conditions amid winter advisory
Here's how snow is affecting Seattle area schools, Crystal Mountain, roads and more.
Snoqualmie Pass (other)Sea-Tac airport (other)
The Seattle Times·Yesterday
Grid·outage
More than 50,000 without power in Washington as snow hampers restoration efforts
The Friday morning snow in Washington is creating issues for Puget Sound Energy crews trying to restore customers' power after Wednesday's...
Washington (other)Puget Sound Energy (operator)
MyNorthwest.com·Yesterday
Grid·outage
Winds, heavy rain leave thousands without power across western Washington
WASHINGTON STATE — Strong winds and steady rain moved through western Washington on Wednesday, knocking out power to tens of thousands of...
Washington (other)
KOMO·2 days ago
General
Residents question Snoqualmie-area lithium battery storage project as evaluation begins
A proposed battery energy storage project in unincorporated King County near Snoqualmie Ridge remains in the early stages of review,...
KOMO·1 weeks ago
Last updated 2026-03-14
View all 10 articles