Oil-Fired Power Plants in South Dakota
Every operating oil-fired power plant in South Dakota on EIA-860M for 2026-07: 8 plants, 13 generating units and 244 MW of nameplate capacity across 7 counties, most of it inside SPP.
As of 2026-07 (inventory dated 2026-07-31) · EIA-860M Preliminary Monthly Electric Generator Inventory · eia.gov/…/july_generator2026.xlsx · eia.gov/…/eia860m
- Plants
- 8
- 13 generating units
- Nameplate capacity
- 244 MW
- Counties
- 7
- Grid operator
- SPP
- covers most of these plants
Map of oil-fired power plants in South Dakota
Every one of the 8 plants is drawn at the coordinate EIA files for it.
Loading map…
- Petroleum · 8
List of oil-fired power plants in South Dakota
Sort by any column. Capacity is nameplate, summed across every generating unit EIA lists at the site.
| Spirit MoundPetroleum Liquids | Basin Electric Power Coop | Clay | 135 | 2 | 1978 | Operating |
| Watertown Power PlantPetroleum Liquids | Missouri Basin Muni Power Agny | Codington | 67.5 | 1 | 1978 | Operating |
| Lake PrestonPetroleum Liquids | Otter Tail Power Co | Kingsbury | 24.1 | 1 | 1978 | Standby/Backup |
| Ft. PierrePetroleum Liquids | City of Fort Pierre - (SD) | Stanley | 6 | 3 | 2004 | Operating |
| Valley Queen CheesePetroleum Liquids | Valley Queen Cheese Factory, Inc. | Grant | 4.5 | 3 | 2002 | Standby/Backup |
| Clark (SD)Petroleum Liquids | NorthWestern Energy - (SD) | Clark | 2.7 | 1 | 1970 | Standby/Backup |
| FaulktonPetroleum Liquids | NorthWestern Energy - (SD) | Faulk | 2.7 | 1 | 1969 | Standby/Backup |
| State Auto InsurancePetroleum Liquids | SLB Milbank LLC | Grant | 1.7 | 1 | 2001 | Standby/Backup |
Largest oil-fired power plants in South Dakota
- 1Spirit MoundClay County, South Dakota135 MW
- 2Watertown Power PlantCodington County, South Dakota67.5 MW
- 3Lake PrestonKingsbury County, South Dakota24.1 MW
- 4Ft. PierreStanley County, South Dakota6 MW
- 5Valley Queen CheeseGrant County, South Dakota4.5 MW
- 6Clark (SD)Clark County, South Dakota2.7 MW
- 7FaulktonFaulk County, South Dakota2.7 MW
- 8State Auto InsuranceGrant County, South Dakota1.7 MW
Oil-fired power plants by county in South Dakota
The county EIA files against each plant. It is the fastest way to find the plant nearest a given town.
| County | Plants | Nameplate MW |
|---|---|---|
| Clay | 1 | 135 |
| Codington | 1 | 67.5 |
| Kingsbury | 1 | 24.1 |
| Grant | 2 | 6.2 |
| Stanley | 1 | 6 |
| Clark | 1 | 2.7 |
| Faulk | 1 | 2.7 |
Oil-Fired Power Plants in South Dakota: FAQ
- How many oil-fired power plants are in South Dakota?
- 8, with 244 MW of nameplate capacity between them, spread over 7 counties. That is the EIA-860M operating count for 2026-07.
- Is there a map of South Dakota oil-fired power plants?
- Yes — the map above. Each dot is one oil-fired power plant, sized by nameplate capacity and placed at the coordinates EIA files for it.
- Which is the largest oil-fired power plant in South Dakota?
- Spirit Mound, at 135 MW. The table is sorted largest first, so the rest follow it.
- Is there a oil-fired power plant near me in South Dakota?
- The county roll-up below groups every plant by county, which is the quickest way to find the one closest to a given town.
- Which grid operator runs South Dakota's oil-fired power plants?
- Most of them sit inside SPP, according to the balancing-authority code EIA files against each plant. Live conditions for that market are on this site.
- How current is this, and what is left out?
- EIA-860M for 2026-07. Petroleum liquids and petroleum coke. Many are peakers or standby units. Plants below 1 MW are not surveyed by EIA and so are absent; retirements and additions after 2026-07 arrive with the next monthly release.