Iowa Clean Energy Blueprint

Solar projects in support of our Clean Energy Blueprint in Iowa are currently being identified and will be announced.

Duane Arnold Solar Project

In November 2021, we announced our intent to acquire 200 megawatts of solar energy from the Duane Arnold Solar Project that NextEra Energy Resources is developing in Linn County. The project also includes 75 megawatts of battery energy storage at the same location.

This will repurpose a portion of the land and infrastructure at the former Duane Arnold nuclear energy facility into the state’s largest solar and battery storage facility.

We filed an application with the Iowa Utilities Board and expect a decision in 2022.

Learn more about the Duane Arnold Solar Project.

Dubuque Solar project

The Dubuque Solar project is a combination of two sites, the West Dubuque Solar Garden and the Downtown Dubuque Solar Garden. This project earned the Envision Platinum rating for sustainable infrastructure – the highest Envision award level. This is the first solar project to receive Envision recognition.

Watch our video about the Dubuque Solar Project

West Dubuque Solar Garden

The West Dubuque Solar Garden is the largest single solar project in Iowa. In September 2017, the West Dubuque Solar Garden came online to bring clean energy to customers. This 3.9-megawatt site uses more than 15,000 panels.

The annual output of this solar garden is equal to the annual usage of about 727 average Iowa homes. The site covers 21.1 acres of land in a new industrial park in Dubuque, Iowa. This land was sloped and not ideal to build a large manufacturing facility. However, this slope is ideal for a solar garden. Because of the slope, we are able to place the panels closer together without casting shade on the back rows – just like stadium seating.

The West Dubuque Solar Garden and the Downtown Dubuque Solar Garden are the result of innovative partnership with the city of Dubuque and the Greater Dubuque Development Corporation.

Downtown Dubuque Solar Garden

The Downtown Dubuque Solar Garden welcomes travelers from the tri-states (Iowa, Wisconsin and Illinois). This project is located between downtown Dubuque and the Mississippi River. The Downtown Dubuque Solar Garden features an educational display and information to teach visitors about advancements in clean energy technology.

This is a 901-kilowatt AC solar garden, and its annual output is equal to the annual usage of about 126 average Iowa homes. It started generating clean energy in September 2017.

The Downtown Dubuque Solar Garden is located on a former industrial site, currently owned by A.Y. McDonald Co.

Indian Creek Nature Center solar project

The Amazing Space facility at the Indian Creek Nature Center in Cedar Rapids reached Net Zero status in 2018. An Alliant Energy owned solar array, built on site, delivers enough energy to account for the buildings annual usage. This achievement puts the building in a class of its own as Indian Creek Nature Center is the first commercial building in Iowa to pursue Net Zero Energy certification.

There are 420 solar panels on site, some on the roof and some on the ground. You can see real-time information on how much energy the panels are producing today, this month and even this year. This data helps  us identify what works best in our climate. This helps us plan to meet the energy needs of our customers as efficiently and cleanly as possible.

Visit Indian Creek Nature Center’s website to learn how they built sustainability into every aspect of Amazing Space!

Marshalltown Generating Station solar project

In spring 2017, our 706-megawatt, highly efficient natural gas generating station went into operation in Marshalltown, Iowa. In early 2020, a 2.5-megawatt solar system that provides clean energy to our customers became operational. The solar garden’s power offsets local electric demand and improves our sustainability footprint in Marshalltown.

Learn more about the Marshalltown Generating Station

Perry Customer-Hosted Solar

In spring 2021, Alliant Energy and the city of Perry reached agreement to install a 1-megawatt solar facility on a 7-acre site on the western edge of the city. Alliant Energy will oversee construction of the solar facility and will own, operate and maintain it. The solar system will provide clean energy to our customers in the area when it becomes operational by mid-2022.

Learn more about the Perry customer-hosted solar project