Diamond Willow Wind Facility
Diamond Willow Wind Facility is a 30 MW wind farm in Fallon County, Montana, operated by Montana-Dakota Utilities Co. EIA-860M lists 1 generating unit here, inside MISO. Its unit entered service in 2007.
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
- 30 MW
- 30 MW net summer
- Generating units
- 1
- In service
- 2007
- EIA plant ID
- 56782
Where it is
Loading map…
- County
- Fallon County, Montana
- Coordinates
- 46.2753, -104.1836
- Balancing authority
- MISO
- Sector
- Electric Utility
Units, technology and status
- Operator of record
- Montana-Dakota Utilities Co
- Primary energy source
- Wind
- Technologies
- Onshore Wind Turbine
- Status
- Operating
Diamond Willow Wind Facility: FAQ
- Where is Diamond Willow Wind Facility?
- In Fallon County, Montana (MT). 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 Diamond Willow Wind Facility?
- 30 MW of nameplate capacity across 1 unit, as of the EIA-860M release for 2026-07.
- Who owns Diamond Willow Wind Facility?
- EIA-860M names Montana-Dakota Utilities Co 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 Diamond Willow Wind Facility LLC?
- Probably, but EIA-860M does not say. The survey records a plant name and a reporting entity — Montana-Dakota Utilities Co 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 "Diamond Willow Wind Facility LLC" usually means this site. This page shows only what EIA files, and does not assert a corporate structure it cannot see.
- Is Diamond Willow Wind Facility still running?
- EIA-860M files it as "Operating" for 2026-07. Statuses change monthly, and this page follows the monthly release.