- Clean firm
- Retired
- 10 · 100 · 1,000 MW
Map
- Clean firm
- Retired
Milltown: location. Basemap: Protomaps, © OpenStreetMap contributors, ODbL.
Milltown
Power plant · Hydro
Key facts
Power plant · Hydroran 24% of 2003 Retired- Capacity
- Capacity: sourceEIA-860M · Open licenseMW
- Commissioned
- 1908
- Net generation, 2003
- 6,429 MWh
- Grid
- NorthWestern Corporation (NWMT)
- Location
- Missoula County, Montana
- Operated by
- NorthWestern Energy (MT Hydro)SourceEIA-860M Preliminary Monthly Electric Generator Inventory
Output
Details
Who’s behind it
No companies named in filings yet.
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- Technology
- Hydro source: “Conventional Hydroelectric”
- Age
- 118 years since 1908
1 attribute from EIA-860M Preliminary Monthly Electric Generator Inventory
| Attribute | Value |
|---|---|
| Balancing authority code | NWMT |
Retirement
EIA-860M September 2026StatusEvery generator EIA lists at this plant has retired. As of EIA-860M for September 2026.- Retired
- December 2007
- Capacity retired
- 3 MW
- Generators retired
- 5
| Generator | Technology | Nameplate | State | Date |
|---|---|---|---|---|
| 1 | Conventional Hydroelectric | 0.6 MW | Retired | December 2007 |
| 2 | Conventional Hydroelectric | 0.6 MW | Retired | December 2007 |
| 3 | Conventional Hydroelectric | 0.6 MW | Retired | December 2007 |
| 4 | Conventional Hydroelectric | 0.6 MW | Retired | December 2007 |
| 5 | Conventional Hydroelectric | 0.6 MW | Retired | December 2007 |
Grid
EIA-860 2025Grid fieldsAs the plant reported them to EIA-860 for 2025 (Schedule 2).- Transmission or distribution system owner
- NorthWestern Corporation
- Balancing authority
- NorthWestern Energy (NWMT)
- NERC region
- WECC
Can the connection be reused?
A plant that retires usually leaves its substation, transmission connection and interconnection agreement behind, and those may be reusable by a new project at the same site. FERC Order No. 845 lets an interconnection customer use surplus interconnection service at an existing site, and some transmission providers' tariffs let a replacement resource take over a retiring unit's interconnection service, usually within a set time after the retirement. Whether any such right still exists here, who holds it and on what terms depends on the owner, the transmission provider and timing; this page does not establish any of that.
Timeline
- Stated Units 1, 2, 3, 4, 5 scheduled to retire, 3 MW · EIA-860M
- In service · EIA-860M
Sources
3 sourcesSources EIA-860M · EIA · EIA-860M Preliminary Monthly Electric Generator Inventory
Sources
- EIA-860M Preliminary Monthly Electric Generator Inventory
- EIA Open Data bulk file — Electricity (ELEC.zip; monthly plant net generation and fuel consumption since 2001)Source: U.S. Energy Information Administration, Electricity bulk data (Form EIA-923 monthly plant series)
- EIA-860M Preliminary Monthly Electric Generator Inventory