Iowa utility plans largest solar + storage project in the state

In a filing with the Iowa Utilities Board (IUB), Alliant Energy announced plans to add the first portion of its planned 400 MW of solar power generation in Iowa. In the filing, Alliant Energy describes its intention to acquire 200 MW of solar and 75 MW of battery energy storage from Phase I and II of the Duane Arnold Solar Project to be developed by wholly owned indirect subsidiaries of NextEra Energy Resources in Linn. District.

Once operational, Alliant Energy will own and operate both projects. This announcement is the first major milestone for Alliant Energy in the execution of its Blueprint for clean energy in Iowa. Once operational, expected by the end of 2024, the project positions Alliant Energy as the largest combined solar and battery storage operator in the state.

“It’s part of our purposeful strategy to serve customers and build stronger communities,” said Terry Kouba, president of Iowa energy company Alliant Energy. “Our plan also keeps customer affordability at the forefront. We are excited to convert the land’s decommissioned nuclear facility into the largest solar and battery storage facility in Iowa.”

The development and construction of the 200 MW solar and 75 MW battery storage facility at the Duane Arnold Solar Project will create up to 200 new construction jobs. The projects also repurpose some of the land and infrastructure of the former Duane Arnold nuclear power plant. The existing transmission infrastructure already in place on the site is expected to be used.

“This is good for our customers, the communities we serve and the environment while providing solar power to tens of thousands of homes,” said Mayuri Farlinger, director of operations at Alliant Energy. “In addition, these projects assure our customers that we have a diverse mix of reliable power generation to meet their ongoing demand.”

The company expects to outline plans for the remaining 200 MW of solar power generation in Iowa at a future date.

Alliant Energy submitted its application to the Iowa Utilities Board today (November 2, 2021) to advance these projects. The announcement coincides with the filing of subsidiaries of NextEra Energy Resources with the IUB, seeking approval for the location of the facilities. A decision from the IUB is expected in the second half of 2022.

News item from Alliant Energy

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