Yankton
Yankton County, South Dakota · EIA plant ID 8034 · Operator: NorthWestern Energy - (SD)
Nameplate13MWSummer 14 MW
Generators4in service
Net generation-0GWh12 mo to Dec 2025
Capacity factor-0%!gas/coal/oil units, summer MW
Heat rate—Btu/kWhfossil units, electric fuel, HHV
First online1963Runs as rarely runs
Monthly net generation
EIA-923, all units at the plant. Net of station use; storage can go negative.
FinalPreliminary
Capacity factor by year
Net MWh ÷ (summer MW × hours), gas/coal/oil units. Each year uses that year's EIA-860 ratings; the hollow dot is the latest 12 months.
Heat rate by year
Electric fuel MMBtu × 1000 ÷ net MWh (Btu/kWh, HHV), fossil units only; CT + CA counted as one combined-cycle block.
Annual data table
| Year | Net GWh | Capacity factor | Heat rate (Btu/kWh) |
|---|---|---|---|
| 2001 | 0 | 0.0% | — |
| 2002 | 0.2 | 0.2% | 10,941 |
| 2003 | -0.1 | -0.1% | — |
| 2004 | -0.1 | -0.1% | — |
| 2005 | -0.2 | -0.1% | — |
| 2006 | -0.2 | -0.2% | — |
| 2007 | 0.5 | 0.4% | 24,646 |
| 2008 | 0.3 | 0.2% | 26,723 |
| 2009 | -0 | 0.0% | — |
| 2010 | 0.1 | 0.1% | — |
| 2011 | -0.1 | -0.1% | — |
| 2012 | 0.2 | 0.2% | 19,188 |
| 2013 | -0.5 | -0.4% | — |
| 2014 | -0.4 | -0.3% | — |
| 2015 | -0.5 | -0.4% | — |
| 2016 | -0.3 | -0.3% | — |
| 2017 | -0.3 | -0.2% | — |
| 2018 | -0.3 | -0.3% | — |
| 2019 | -0.3 | -0.3% | — |
| 2020 | -0.3 | -0.3% | — |
| 2021 | -0.2 | -0.1% | — |
| 2022 | -0.3 | -0.3% | — |
| 2023 | -0.3 | -0.2% | — |
| 2024 | -0.2 | -0.1% | — |
| 2025 | -0.1 | -0.0% | — |
Generators
EIA-860 (annual) with EIA-860M updates through Sep 2026. EIA-923 reports generation by plant, prime mover and fuel, not by unit, so unit-level output isn't shown.
| Gen ID | Technology | Prime mover | Nameplate MW | Summer MW | Online | Status | Planned retirement | OEM / model |
|---|---|---|---|---|---|---|---|---|
| 1 | Natural Gas Internal Combustion Engine | IC | 2.2 | 2.2 | Aug 1974 | Operating (Standby / backup) | — | coming soon |
| 2 | Petroleum Liquids | IC | 2.7 | 2.8 | Aug 1974 | Operating (Standby / backup) | — | coming soon |
| 3 | Natural Gas Internal Combustion Engine | IC | 6.5 | 6.5 | Mar 1975 | Operating (Standby / backup) | — | coming soon |
| 4 | Petroleum Liquids | IC | 2 | 2 | Feb 1963 | Operating (Standby / backup) | — | coming soon |
Owner / operator
Operator: NorthWestern Energy - (SD). Ownership shares by in-service nameplate MW (EIA-860 Schedule 4; units not listed there are wholly owned by the operator).
| NorthWestern Energy - (SD) | 100.0% | 13 MW |
Nearby plants
Within 80 km.
| Gavins Point | 132 MW | 11.6 km |
| Prevailing Wind Park | 220 MW | 21.4 km |
| Crofton Bluffs Wind LLC | 40 MW | 28.5 km |
| Spirit Mound | 135 MW | 29.6 km |
| Elkhorn Ridge Wind LLC | 81 MW | 30.7 km |
| Laurel | 4 MW | 55.8 km |