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487.8 MW Hydro operating in Sanders, MT — Avista Corporation
487.8 MW
Nameplate Capacity
5
Generators
units
Conventional Hydroelectric
Technology
1959
Operating Since
| Field | EIA | GEM | Wikidata |
|---|---|---|---|
| Operator | Avista Corp | Avista | — |
| Owner(s) | Avista Corp | Avista | — |
| Status | Operating | operating | — |
Noxon Rapids Dam is an earthfill gravity-type hydroelectric dam on the Clark Fork river, in the northwest part of the U.S. state of Montana.
Read more on WikipediaNoxon Rapids is a hydroelectric power plant located in Sanders County, Montana. The plant, which began operating in 1959, has a total capacity of 487.8 MW distributed across five generators. It is owned and operated by Avista Corporation. The plant is the second-largest of six hydroelectric facilities in Montana, and ranks 50th out of 194 nationally.
Noxon Rapids operates within the Western Electricity Coordinating Council (WECC) NERC region, and is under the balancing authority of Avista Corporation. The plant's latest annual generation was 1,324,290 MWh, resulting in a capacity factor of 30.9%. Financial data indicates an installed cost of $432.78 per kW.
Generated from EIA, GEM, and public data sources
Grid Region
Pacific Northwest
Market
WEIM Participant
NERC Region
WECC — Western Electricity Coordinating Council
Balancing Authority
89.6K MWh
Latest Month
1.3M MWh
Annual Generation
30.9%
Capacity Factor
Energy storage · Avista Corporation · Data from 2015–2024
$454/kW
Installed Cost
$1.7/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 2026-03-26
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ask pi about Noxon RapidsAvista Corporation (AVA)
Grid Voltage
230.0 kV
Regulatory Status
RE — Regulated
Entity Type
Investor-Owned Utility
Sector
Electric Utility