Alliant Energy has filed an application with the Public Service Commission of Wisconsin seeking approval for a 277-megawatt wind farm in Columbia County, marking one of the utility’s most significant renewable energy proposals in the state to date. The Columbia Wind project would add new generating capacity to Wisconsin’s grid and expand the company’s utility-owned wind fleet if regulators grant approval.
The plan for the development includes the erection of more than 40 turbines on farmland and rural land. The company claims to have reached voluntary land use agreements with more than 300 participating land owners after conducting extensive planning, environmental assessments, and outreach. Alliant Energy states that the plan has been under development for close to five years as part of the utility’s overall transition plan.
“Columbia Wind will have more production capacity than any other wind facility in the state of Wisconsin, yet it will have fewer turbines in operation,” said Ben Lipari, Vice President of Commercial Operations for Alliant Energy.
Economic Impact
According to the documents provided by the project, the wind farm would be able to meet the electricity demand of around 100,000 homes once the project becomes fully operational. Apart from providing electricity to the community, the Columbia Wind project would also be beneficial to the local government in terms of fiscal benefits. In an update provided to Construction Review Online, Alliant Energy confirmed that the project is expected to generate around $41.5 million in tax revenue for Columbia County over the life of the project, and that construction would create near 200 temporary jobs.
Alliant Energy has awarded the turbine supply contract to Nordex. The company recently restarted production at a plant in Iowa, so that the larger components can be assembled in the Midwest.
A decision on the proposal by the Public Service Commission is expected to be made early next year, 2027, but if approved, Alliant Energy has already set a schedule to construct the plant, expecting to be up and running by the end of 2028. The plant would be part of the 1,800 megawatt wind energy that the company already has in Wisconsin, Iowa, and Minnesota.
Onshore wind capacity in the Midwest
While Columbia Wind reflects continued growth in onshore wind capacity in the Midwest, the broader U.S. wind sector has navigated regulatory barriers in recent months. The Trump administration in late 2025 issued suspension orders targeting several offshore wind developments, citing national security and permitting concerns. The actions stalled construction timelines and injected uncertainty into long-term planning for coastal projects.
The offshore segment has since seen a partial reversal. In January 2026, a federal court granted a preliminary injunction lifting the suspension on the Revolution Wind project off the Northeast coast, ruling the government had not provided adequate justification to halt work already underway. The decision allows construction to resume while litigation continues, restoring some momentum to offshore development and underscoring the extent to which federal policy shifts and legal rulings are influencing progress across both onshore and offshore wind initiatives.
Additionally, Columbia Wind fits into a broader mix of new energy generation taking shape across the Midwest, where utilities on the same regional grid are meeting demand through very different technologies. In Missouri, Ameren Missouri has filed for approval of the West Alton Energy Center, a 2,100-megawatt gas plant that offers firm, around-the-clock output — a contrast to Columbia Wind’s cheaper but weather-dependent generation. Both utilities operate within the MISO footprint, and West Alton’s targeted 2031 completion trails Columbia Wind’s expected early-2027 decision by about two years, reflecting how much faster wind projects typically clear state review compared with large thermal builds.
Columbia Wind Project Factsheet
Project Overview
Project Name: Columbia Wind
Developer: Alliant Energy
Location: Columbia County, Wisconsin
Capacity: 277 megawatts (MW)
Status: Application filed with Wisconsin Public Service Commission (PSC)
Project Specifications
Number of Turbines: More than 40
Turbine Manufacturer: Nordex
Development Timeline: Nearly 5 years
Expected Operational Date: End of 2028 (pending PSC approval)
Annual Energy Production: Enough to power approximately 100,000 Wisconsin homes
Key Features
- Highest production capability of any Wisconsin wind site
- Significantly fewer turbines compared to similar capacity projects
- Utilizes best practices for minimizing landowner and community impacts
- Part of Alliant Energy’s Energy Blueprint strategy for balanced energy mix
Economic Impact
- Landowner Partnerships: Over 300 landowners with voluntary lease agreements
- Tax Revenue: Approximately $41.5 million for Columbia County over the life of the project
- Construction Jobs: Near 200 temporary positions
- Local Benefits: Diversified income opportunities and strengthened local economy
Strategic Importance
- Strengthens grid reliability for customers
- Adds new renewable capacity to the regional grid
- Reinforces Alliant Energy’s position as a top-five regulated utility owner/operator of wind generation in the U.S.
- Complements existing portfolio of 1,800 MW wind capacity across Iowa, Wisconsin, and Minnesota
Strategic Importance
Project Timeline
PSC Application Filed: 2026
Expected PSC Decision: Early 2027
Projected Commercial Operation: Late 2028
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