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70 MW Hydro operating in Lincoln, WA — Avista Corporation
70 MW
Nameplate Capacity
4
Generators
units
Conventional Hydroelectric
Technology
1915
Operating Since
Coordinates
47.8366, -117.8408
County
Lincoln, WA
Nearby Plants
| Field | EIA | GEM | Wikidata |
|---|---|---|---|
| Operator | Avista Corp | Avista | — |
| Owner(s) | Avista Corp | Avista | — |
| Status | Operating | operating | — |
Long Lake Dam is a concrete gravity dam on the Spokane River, between Lincoln County and Stevens County about 30 miles (48 km) northwest of Spokane in eastern Washington. It forms Long Lake (Washington), a 23.5 mi (37.8 km) long reservoir, and has a hydroelectric generating capacity of 71 megawatts. The dam was built by Washington Water Power, which operates five other dams along the Spokane.
Read more on WikipediaLong Lake is a 70 MW hydroelectric power plant located in Lincoln County, Washington. The plant began operating in 1915 and consists of four generators utilizing conventional hydroelectric technology. It is owned and operated by Avista Corporation. The plant's primary fuel source is water (WAT). Long Lake is within the Avista Corporation balancing authority and the Western Electricity Coordinating Council (WECC) NERC region.
In the most recent year with available data, Long Lake generated 456,166 MWh, achieving a capacity factor of 68.9%. According to available data, the installed cost per kW for the plant was $897.19. Long Lake ranks as the 28th largest power plant in Washington out of 75, and nationally it ranks 254th out of 1464 plants.
Generated from EIA, GEM, and public data sources
Grid Region
Pacific Northwest
Market
WEIM Participant
NERC Region
WECC — Western Electricity Coordinating Council
Balancing Authority
41.9K MWh
Latest Month
456.2K MWh
Annual Generation
68.9%
Capacity Factor
Energy storage · Avista Corporation · Data from 2015–2024
$953/kW
Installed Cost
$3.2/MWh
Operating Cost
Annual Capital & Operating Expenses
Cumulative Installed Cost
Per-Unit Cost Trends
This plant's balancing authority participates in CAISO's Western Energy Imbalance Market (WEIM). Direct nodal pricing data is not yet available.
Last updated 2026-03-14
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ask pi about Long LakeAvista Corporation (AVA)
Grid Voltage
115.0 kV
Regulatory Status
RE — Regulated
Entity Type
Investor-Owned Utility
Sector
Electric Utility