State Auto Insurance
Grant County, South Dakota · EIA plant ID 56244 · Operator: SLB Milbank LLC
Nameplate2MWSummer 2 MW
Generators1in service
Net generation—GWh12 mo
Capacity factor—no 923 generation in the last 12 months
Heat rate—Btu/kWhfossil units, electric fuel, HHV
First online2001
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), primary-fuel 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) |
|---|---|---|---|
| 2005 | 0 | 0.0% | — |
| 2007 | 0 | 0.0% | — |
| 2008 | 0 | 0.3% | 6,878 |
| 2009 | 0 | 0.3% | 6,980 |
| 2010 | 0 | 0.2% | 13,837 |
| 2011 | 0 | 0.2% | 13,837 |
| 2012 | 0 | 0.0% | — |
| 2013 | 0 | 0.2% | 13,755 |
| 2014 | 0 | 0.2% | 13,755 |
| 2015 | 0 | 0.2% | 15,306 |
| 2016 | 0 | 0.1% | — |
| 2017 | 0 | 0.0% | — |
| 2018 | 0 | 0.1% | 17,474 |
| 2019 | 0 | 0.1% | 8,707 |
| 2021 | 0 | 0.0% | 18,000 |
| 2022 | 0 | 0.1% | 11,571 |
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 | Petroleum Liquids | IC | 1.7 | 1.7 | Apr 2001 | Operating (Standby / backup) | — | coming soon |
Owner / operator
Operator: SLB Milbank LLC. Ownership shares by in-service nameplate MW (EIA-860 Schedule 4; units not listed there are wholly owned by the operator).
| SLB Milbank LLC | 100.0% | 2 MW |
Nearby plants
Within 80 km.
| Valley Queen Cheese | 5 MW | 1.6 km |
| Big Stone | 451 MW | 12.4 km |
| Crowned Ridge Wind Energy Center | 200 MW | 18.7 km |
| Dakota Range Wind | 304 MW | 31.8 km |
| Crowned Ridge Wind II Energy Center | 201 MW | 34.3 km |
| Dakota Range III Wind Project | 154 MW | 38.5 km |