employee at a battery storage facility

Energy for the future

A resilient future starts with smart investments in wind energy and battery storage – to strengthen the grid, fuel local economies and ensure safe, reliable power for generations to come.

We're proud to build on our strong roots in Franklin County, Iowa with a growing portfolio of energy projects.


Our existing wind farms

Today, we own and operate three wind projects in Franklin County. These facilities generate enough electricity to power the equivalent of 160,000 homes annually – delivering safe, cost-effective, homegrown energy across the region.

Since our first project in the county became operational in 2009, our projects have already contributed over $41 million in local tax revenue and over $18 million in lease payments to participating landowners, strengthening and supporting rural communities.

Two new proposed wind projects

Our two new proposed projects — Wild Rose and Whispering Willow South — continue this legacy, expanding upon Franklin County’s exceptional wind resources and valued community partnerships.  

Once operational, these projects will generate an estimated $150 million in tax revenue over the first 20 years of their lives. They will also provide predictable income streams for voluntarily-participating landowners.

Battery energy storage system (BESS)

To complement this generation, we’re also building a battery energy storage system (BESS) at our Whispering Willow North Wind Farm. Once operational, excess energy will be captured when demand is low and released when demand peaks. By storing renewable energy for use when it’s needed most, BESS positions us to maximize the value and reliability of our wind resources.

Together, with our existing and proposed wind projects and our battery storage site, we’re building a resilient energy future for generations to come.

wind turbines in the air

Whispering Willow South wind project

Size: 200 megawatts

Number of turbines: 34-45

Homes powered: About 80,000

Learn more about Whispering Willow South
Wind turbines in an open field.

Wild Rose wind project

Size: 200 megawatts

Number of turbines: 34-40

Homes powered: About 80,000

Learn more about Wild Rose
Alliant Energy employee near a storage battery

Whispering Willow North battery energy storage system (BESS)

Location: Whispering Willow North Wind Farm

Phase one storage capacity: 75 megawatts
Phase one operational date: Late 2026

Phase two storage capacity: 125 megawatts
Phase two operational date: 2027

Learn more about the Whispering Willow North BESS

Map of our Franklin County projects

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