Mystic
Hydro power plant in Stillwater County, Montana. 12 MW of nameplate capacity across 2 generators, operated by NorthWestern Energy (MT Hydro).
Also known as EIA plant 2192
Analyst: free account, 1 question a day.
Key facts
- Capacity
- 12 MWNameplate
- Generators
- 2 operatingEIA-860M, August 2026
- Operating since
- May 1925First generator online
- Operator
- NorthWestern Energy (MT Hydro)EIA operator ID 13902
- Grid
- NWMTBalancing authority NWMT
- Price nodes
- None linkedNo verified ISO node
- Location
- Stillwater County, MT45.2257, −109.7625
- EIA plant ID
- 2192EIA plant page
Data as of EIA-860M August 2026 (published 2026-09-24). Capacity is nameplate, not live output.
How much power Mystic produces
Free · EIA-923Net generation, 2025
52.5 GWh
52,456 MWh, final
Capacity factor, 2025
49.9%
2024: 51.0%
January to July 2026
Not reported
Provisional. 0 of 7 months reported
Range, 2015 to 2025
38.2–62.3
GWh a year. Low 2022, high 2023
| Year | Net generation, MWh | Capacity factor | Months reported |
|---|---|---|---|
| 2000 | Not reported | Not reported | 0 of 12 |
| 2001 | 38,751 | Not reported | 12 of 12 |
| 2002 | 40,652 | Not reported | 12 of 12 |
| 2003 | 45,052 | Not reported | 12 of 12 |
| 2004 | 43,319 | Not reported | 12 of 12 |
| 2005 | 42,622 | Not reported | 12 of 12 |
| 2006 | 43,252 | Not reported | 12 of 12 |
| 2007 | 48,577 | Not reported | 12 of 12 |
| 2008 | 53,487 | Not reported | 12 of 12 |
| 2009 | 54,439 | Not reported | 12 of 12 |
| 2010 | 46,138 | 52.7% | 12 of 12 |
| 2011 | 50,609 | Not reported | 12 of 12 |
| 2012 | 49,084 | 46.6% | 12 of 12 |
| 2013 | 54,124 | 51.5% | 12 of 12 |
| 2014 | 57,106 | 54.3% | 12 of 12 |
| 2015 | 57,481 | 54.7% | 12 of 12 |
| 2016 | 51,416 | 48.8% | 12 of 12 |
| 2017 | 61,891 | 58.9% | 12 of 12 |
| 2018 | 61,328 | 58.3% | 12 of 12 |
| 2019 | 57,802 | 55.0% | 12 of 12 |
| 2020 | 56,432 | 53.5% | 12 of 12 |
| 2021 | 52,949 | 50.4% | 12 of 12 |
| 2022 | 38,248 | 36.4% | 12 of 12 |
| 2023 | 62,332 | 59.3% | 12 of 12 |
| 2024 | 53,734 | 51.0% | 12 of 12 |
| 2025 | 52,456 | 49.9% | 12 of 12 |
| 2026 (provisional, partial year) | Not reported | Not reported | 0 of 7 |
* 2026 covers January to July and is provisional. Capacity factor is net generation divided by nameplate capacity times the hours of each reported month.
Power prices and basis
Free accountNo verified ISO price node is linked to this plant, or its price history could not load.
Emissions
Free · EPA CAMPDNo EPA emissions units are linked to this plant.
Water use
Free · EIA-923 cooling, USGSNo EIA cooling-water record for this plant in 2024. Plants without steam cooling, such as wind, solar and batteries, do not report cooling water.
Generators
Free · EIA-860M| Generator | Technology | Nameplate MW | Online since |
|---|---|---|---|
| MYS1 | Conventional Hydroelectric | 6.0 | May 1925 |
| MYS2 | Conventional Hydroelectric | 6.0 | May 1925 |
Ownership and offtake
ProOwnership and offtake are part of Pro
Owners and their shares, parent companies, and power purchase agreements with their buyers. EIA-860M lists NorthWestern Energy (MT Hydro) as the operator, which is not always the owner.
Modeled data
ProPro adds modeled values for this plant. Everything above stays free.
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Power plants near Mystic
More plants operated by NorthWestern Energy (MT Hydro)
Questions about Mystic
How much power does Mystic produce?
Mystic reported 52,456 MWh (52.5 GWh) of net generation in 2025, a 49.9% capacity factor on 12 MW of nameplate capacity.
Where is Mystic?
Mystic is in Stillwater County, Montana, at 45.2257, −109.7625. It is in the NorthWestern Energy (NWMT) balancing area (NWMT).
Who operates Mystic?
EIA-860M for August 2026 lists NorthWestern Energy (MT Hydro) as the operator (EIA operator ID 13902). The operator is not always the owner.
When did Mystic start operating?
Its first generator began operating in May 1925, according to EIA-860M.
Sources
- EIA-860 2025 (final) and EIA-860M August 2026: plant, generators, capacity, operator and location
- EIA-923 monthly net generation, 2000 to July 2026 (2026 provisional)
Page updated 2026-10-04 from the InfraMap data build. Methodology · Data sources · EIA plant page