- Clean firm
- Operating
- 10 · 100 · 1,000 MW
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- Clean firm
- Operating
Superior Falls: location. Basemap: Protomaps, © OpenStreetMap contributors, ODbL.
Superior Falls
Power plant · Hydro
Key facts
Power plant · Hydroran 67% of 2025 Retiring- Capacity
- Capacity: sourceEIA-860M · Open licenseMW
- Commissioned
- 1917
- Net generation, 2025
- 8,176 MWh
- Grid
- 34 kV to Northern States Power Co (MISO)
- Location
- Gogebic County, Michigan
- Operated by
- Northern States Power Co - MinnesotaSourceEIA-860M Preliminary Monthly Electric Generator Inventory
Output
Details
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- Technology
- Hydro source: “Conventional Hydroelectric”
- Age
- 109 years since 1917
All 4 attributes from EIA-860M Preliminary Monthly Electric Generator Inventory
| Attribute | Value |
|---|---|
| Fuel burned (MMBtu), 2025 | 27,896 |
| Capacity factor, 2025 | 0.667 |
| Net generation (MWh), 2025 | 8,176 |
| Balancing authority code | MISO |
Retirement
EIA-860M September 2026StatusAt least half of the plant's in-service nameplate capacity is scheduled to retire, on dates its owner has reported to EIA. As of EIA-860M for September 2026.- Next scheduled retirement
- December 2064
- Capacity scheduled to retire
- 1.4 MW
- Generators scheduled to retire
- 2
- Share of in-service capacity scheduled
- 100%
- Capacity still in service
- 1.4 MW
| Generator | Technology | Nameplate | State | Date |
|---|---|---|---|---|
| 1 | Conventional Hydroelectric | 0.7 MW | Scheduled to retire | December 2064 |
| 2 | Conventional Hydroelectric | 0.7 MW | Scheduled to retire | December 2064 |
Grid
EIA-860 2025Grid fieldsAs the plant reported them to EIA-860 for 2025 (Schedule 2).- Grid voltage at the plant
- 34 kV
- Transmission or distribution system owner
- Northern States Power Co
- Balancing authority
- Midcontinent Independent Transmission System Operator, Inc..
- NERC region
- RFC
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 scheduled to retire, 1.4 MW · EIA-860M
- In service · EIA-860M
Sources
3 sourcesSources EIA-860M · EIA · EIA-860M Preliminary Monthly Electric Generator Inventory
Sources
- EIA-860M
- EIASource: U.S. Energy Information Administration, Electricity bulk data (Form EIA-923 monthly plant series)
- EIA-860M Preliminary Monthly Electric Generator Inventory