State Auto Insurance
State Auto Insurance is a 2 MW oil-fired power plant in Grant County, South Dakota, operated by SLB Milbank LLC. EIA-860M lists 1 generating unit here, inside MISO. Its unit entered service in 2001.
As of 2026-07 (inventory dated 2026-07-31) · EIA-860M Preliminary Monthly Electric Generator Inventory · eia.gov/…/july_generator2026.xlsx · eia.gov/…/eia860m
- Nameplate capacity
- 1.7 MW
- 1.7 MW net summer
- Generating units
- 1
- In service
- 2001
- EIA plant ID
- 56244
Where it is
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- County
- Grant County, South Dakota
- Coordinates
- 45.2207, -96.6168
- Balancing authority
- MISO
- Sector
- Commercial Non-CHP
Units, technology and status
- Operator of record
- SLB Milbank LLC
- Primary energy source
- Petroleum
- Technologies
- Petroleum Liquids
- Status
- Standby/Backup
State Auto Insurance: FAQ
- Where is State Auto Insurance?
- In Grant County, South Dakota (SD). The map on this page is placed at the coordinates EIA files for the plant, which locate the site rather than any individual unit.
- How big is State Auto Insurance?
- 2 MW of nameplate capacity across 1 unit, as of the EIA-860M release for 2026-07.
- Who owns State Auto Insurance?
- EIA-860M names SLB Milbank LLC as the reporting entity. That is the operator of record on the survey, which is not always the ultimate owner.
- Is this the same as State Auto Insurance LLC?
- Probably, but EIA-860M does not say. The survey records a plant name and a reporting entity — SLB Milbank LLC here — not the project company that holds the asset. Project companies are commonly registered as an LLC carrying the plant's name, so a search for "State Auto Insurance LLC" usually means this site. This page shows only what EIA files, and does not assert a corporate structure it cannot see.
- Is State Auto Insurance still running?
- EIA-860M files it as "Standby/Backup" for 2026-07. Statuses change monthly, and this page follows the monthly release.