Diamond Willow Wind Facility
Wind power plant in Fallon County, Montana. 30 MW of nameplate capacity across 1 generator, operated by Montana-Dakota Utilities Co.
Also known as Diamond Willow Wind Farm · Diamond Willow Wind · Diamond Willow extension · EIA plant 56782
Analyst: free account, 1 question a day.
Key facts
- Capacity
- 30 MWNameplate
- Generators
- 1 operatingEIA-860M, August 2026
- Operating since
- December 2007First generator online
- Operator
- Montana-Dakota Utilities CoEIA operator ID 12199
- Grid
- MISOBalancing authority MISO
- Price nodes
- 1 MISO nodeResource nodes with prices
- Location
- Fallon County, MT46.2753, −104.1836
- EIA plant ID
- 56782EIA plant page
Data as of EIA-860M August 2026 (published 2026-09-24). Capacity is nameplate, not live output.
How much power Diamond Willow Wind Facility produces
Free · EIA-923Net generation, 2025
88.0 GWh
87,973 MWh, final
Capacity factor, 2025
33.5%
2024: 32.6%
January to July 2026
Not reported
Provisional. 0 of 7 months reported
Range, 2015 to 2025
82.1–100.1
GWh a year. Low 2023, high 2016
| Year | Net generation, MWh | Capacity factor | Months reported |
|---|---|---|---|
| 2000 | Not reported | Not reported | 0 of 12 |
| 2001 | Not reported | Not reported | 0 of 12 |
| 2002 | Not reported | Not reported | 0 of 12 |
| 2003 | Not reported | Not reported | 0 of 12 |
| 2004 | Not reported | Not reported | 0 of 12 |
| 2005 | Not reported | Not reported | 0 of 12 |
| 2006 | Not reported | Not reported | 0 of 12 |
| 2007 | 16 | Not reported | 12 of 12 |
| 2008 | 64,997 | Not reported | 12 of 12 |
| 2009 | 67,691 | Not reported | 12 of 12 |
| 2010 | 67,902 | Not reported | 12 of 12 |
| 2011 | 98,867 | 37.6% | 12 of 12 |
| 2012 | 90,956 | 34.5% | 12 of 12 |
| 2013 | 93,175 | 35.5% | 12 of 12 |
| 2014 | 96,542 | 36.7% | 12 of 12 |
| 2015 | 89,144 | 33.9% | 12 of 12 |
| 2016 | 100,119 | 38.0% | 12 of 12 |
| 2017 | 93,502 | 35.6% | 12 of 12 |
| 2018 | 85,815 | 32.7% | 12 of 12 |
| 2019 | 94,948 | 36.1% | 12 of 12 |
| 2020 | 98,541 | 37.4% | 12 of 12 |
| 2021 | 92,522 | 35.2% | 12 of 12 |
| 2022 | 90,872 | 34.6% | 12 of 12 |
| 2023 | 82,092 | 31.2% | 12 of 12 |
| 2024 | 85,972 | 32.6% | 12 of 12 |
| 2025 | 87,973 | 33.5% | 12 of 12 |
| 2026 (provisional, partial year) | Not reported | Not reported | 0 of 7 |
* 2026 covers January to July and is provisional. Capacity factor is net generation divided by nameplate capacity times the hours of each reported month.
Power prices and basis
Free account · MISOEmissions
Free · EPA CAMPDNo EPA emissions units are linked to this plant.
Water use
Free · EIA-923 cooling, USGSNo EIA cooling-water record for this plant in 2024. Plants without steam cooling, such as wind, solar and batteries, do not report cooling water.
Generators
Free · EIA-860M| Generator | Technology | Nameplate MW | Online since |
|---|---|---|---|
| DIAW | Onshore Wind Turbine | 30.0 | December 2007 |
Ownership and offtake
ProOwnership and offtake are part of Pro
Owners and their shares, parent companies, and power purchase agreements with their buyers. EIA-860M lists Montana-Dakota Utilities Co as the operator, which is not always the owner.
Modeled data
ProPro adds modeled values for this plant. Everything above stays free.
Modeled curtailment
A range, not one number. The lower bound counts hours inside the production tax credit window; the upper bound is the no-credit case.
Expected vs reported generation
Monthly modeled expected output and physical potential next to EIA-923 reported output.
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Power plants near Diamond Willow Wind Facility
More plants operated by Montana-Dakota Utilities Co
Questions about Diamond Willow Wind Facility
How much power does Diamond Willow Wind Facility produce?
Diamond Willow Wind Facility reported 87,973 MWh (88.0 GWh) of net generation in 2025, a 33.5% capacity factor on 30 MW of nameplate capacity.
Where is Diamond Willow Wind Facility?
Diamond Willow Wind Facility is in Fallon County, Montana, at 46.2753, −104.1836. It is in the Midcontinent Independent Transmission System Operator, Inc.. balancing area (MISO).
Who operates Diamond Willow Wind Facility?
EIA-860M for August 2026 lists Montana-Dakota Utilities Co as the operator (EIA operator ID 12199). The operator is not always the owner.
When did Diamond Willow Wind Facility start operating?
Its first generator began operating in December 2007, according to EIA-860M.
Does InfraMap have power prices for Diamond Willow Wind Facility?
Yes. InfraMap has MISO day-ahead and real-time prices at 1 price node linked to Diamond Willow Wind Facility, with the hub price and node-to-hub basis. Prices are free with an InfraMap account; pricing node names are part of InfraMap Pro.
Sources
- EIA-860 2025 (final) and EIA-860M August 2026: plant, generators, capacity, operator and location
- EIA-923 monthly net generation, 2000 to July 2026 (2026 provisional)
- MISO day-ahead and real-time prices; node and hub assignments as of 2026-10-05
- Plant names from OpenStreetMap, © OpenStreetMap contributors (ODbL)
- Project names from the USGS U.S. Wind Turbine Database
Page updated 2026-10-04 from the InfraMap data build. Methodology · Data sources · EIA plant page