- Combustion
- Retired
- 10 · 100 · 1,000 MW
Map
- Combustion
- Retired
Huron: location. Basemap: Protomaps, © OpenStreetMap contributors, ODbL.
Huron
Power plant · Gas, combustion turbine
Key facts
Power plant · Gas, combustion turbine Retired- Capacity
- Capacity: sourceEIA-860M · Open licenseMW
- Commissioned
- 1961
- Net generation, 2021
- -126 MWh
- Grid
- 69 kV to NorthWestern Energy - (SD) (SWPP)
- Location
- Beadle County, South Dakota
- Operated by
- NorthWestern Energy - (SD)
Output
- Gas
- Oil
Details
Who’s behind it
- Owner
- Northwestern Corp
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- Technology
- Gas, combustion turbine source: “Natural Gas Fired Combustion Turbine”
- Age
- 65 years since 1961
All 2 attributes from EIA-860M Preliminary Monthly Electric Generator Inventory
| Attribute | Value |
|---|---|
| EPA greenhouse gas reporting (GHGRP) |
|
| Balancing authority code | SWPP |
Retirement
EIA-860M September 2026StatusEvery generator EIA lists at this plant has retired. As of EIA-860M for September 2026.- Retired
- April 2022
- First unit retired
- December 2019
- Capacity retired
- 57.9 MW
- Generators retired
- 2
| Generator | Technology | Nameplate | State | Date |
|---|---|---|---|---|
| 2A | Natural Gas Fired Combustion Turbine | 42.9 MW | Retired | December 2019 |
| 1 | Natural Gas Fired Combustion Turbine | 15 MW | Retired | April 2022 |
Grid
EIA-860 2025Grid fieldsAs the plant reported them to EIA-860 for 2025 (Schedule 2).- Grid voltage at the plant
- 69 kV
- Transmission or distribution system owner
- NorthWestern Energy - (SD)
- Balancing authority
- Southwest Power Pool
- NERC region
- MRO
Transmission lines within 25 km (1)
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.
Ownership
2 companies2| Company | Role | Share | As of | Source |
|---|---|---|---|---|
| NorthWestern Energy - (SD) | Operator | EIA-860M | ||
| NORTHWESTERN CORP | Owner | 100.0% | 31 Dec 2023 | EPA GHGRP |
Timeline
- Stated Unit 1 scheduled to retire, 15 MW · EIA-860M
- Stated Unit 2A scheduled to retire, 42.9 MW · EIA-860M
- In service · EIA-860M
Sources
5 sourcesSources EIA-860M · LBNL · EIA · EIA-860M Preliminary Monthly Electric Generator Inventory · EPA Greenhouse Gas Reporting Program — facility register with parent-company shares (Envirofacts pub_dim_facility; FLIGHT)
Sources
- EIA-860M Preliminary Monthly Electric Generator Inventory
- LBNL — A Harmonized Geospatial Dataset of U.S. Transmission Lines: Linking FERC Form 1 and HIFLD, 1994-2024 (OEDI submission 8742)Yin, Nait Belaid & Heleno (2026), Lawrence Berkeley National Laboratory, OEDI, CC BY 4.0: A Harmonized Geospatial Dataset of U.S. Transmission Lines: Linking FERC Form 1 and HIFLD, 1994-2024. Modified by Inframation: HIFLD-side fields only, names re-cased, coordinates rounded.
- 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
- EPA Greenhouse Gas Reporting Program — facility register with parent-company shares (Envirofacts pub_dim_facility; FLIGHT)