Noxon Rapids — Plant Summary
- EIA Plant ID
- 2199
- Capacity
- 487.8 MW
- Primary Fuel
- Hydro
- Technology
- Conventional Hydroelectric
- Status
- Operating
- Location
- Sanders, MT
- Operating Since
- 1959
- Generators
- 5
- Operator
- Avista Corp
- Parent Company
- Avista
- Annual Generation
- 1,324,290 MWh
- Capacity Factor
- 30.9%
- Balancing Authority
- Avista Corporation
- ISO/RTO
- —
- NERC Region
- WECC
Noxon Rapids
OperatingHydro
Ranked #2 of 23 Hydro plants in MT#50 of 1454 nationally
487.8 MW Hydro operating in Sanders, MT — Avista Corporation
EIAGEMWD
487.8 MW
Nameplate Capacity
5
Generators
units
Conventional Hydroelectric
Technology
1959
Operating Since
Location
Ownership & Operator
| Field | EIA | GEM | Wikidata |
|---|---|---|---|
| Operator | Avista Corp | Avista | — |
| Owner(s) | Avista Corp | Avista | — |
| Status | Operating | operating | — |
Ownership Chain
About
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
Engineering & Generators
Grid Context
NERC Region
WECC
Balancing Authority
Avista Corporation
Grid Voltage
230 kV
Regulatory Status
RE
Entity Type
Investor-Owned Utility
Sector
Electric Utility
Generation
89.6K MWh
Latest Month
1.3M MWh
Annual Generation
30.9%
Capacity Factor
Jan 2022 – Dec 2024
Financial DataBeta
Source: FERC Form 1HIGH
$454/kW
Installed Cost
$1.7/MWh
Operating Cost
Avista Corporation
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 (4)Beta
Hazards·extreme cold
Where’s the snow? Warm winter leaves Inland Northwest in the midst of a snow drought
The Spokane area is in the midst of a low snowpack this winter that's being called a “snow drought.”
The Spokesman-Review·4 weeks ago
Grid·capacity addition
For massive Great Falls data center proposal, energy supply is crucial to push project forward
The data center's projected electricity needs of up to 600 megawatts will likely require new power sources, transmission upgrades or both.
Montana Free Press·9 months ago
Deals·m and a
NorthWestern Energy to increase ownership share in Colstrip
NorthWestern Energy says the deal will likely keep Colstrip coal power plant operational through the end of the decade.
NorthWestern Energy (buyer)Colstrip (seller)
Montana Free Press·3 years ago
Industry·other
Improving chemical control of nonnative aquatic plants in run-of-the-river reservoirs
Current dam discharge patterns in Noxon Rapids Reservoir reduce concentration and exposure times (CET) of herbicides used for aquatic plant...
Cambridge University Press & Assessment·3 years ago
Last updated 2026-03-14
View all articles