Alliant Energy plans CO2 energy storage near Portage
Jul 21, 2025 · Alliant Energy plans to build the first CO2 energy storage system in the United States. The project will be located at the Columbia Energy Center near Portage. Alliant
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6 Frequently Asked Questions about “Columbia Power Station Energy Storage”
What is the Columbia Energy Storage Project?
Utilizing cutting-edge technology designed by Energy Dome, the Columbia Energy Storage Project will boost grid stability, improve resilience and deliver enough electricity to power approximately 18,000 Wisconsin homes for 10 hours on a single charge.
What is Alliant Energy's Columbia Energy Storage Project?
Alliant Energy's revolutionary Columbia Energy Storage Project, using Energy Dome's safe, reliable CO2 battery, represents a significant advancement in energy storage while bolstering the power grid to benefit Wisconsin customers.
How much electricity does the Columbia Generating Station produce?
The Columbia Generating Station produces 1,190 gross megawatts of electricity. This accounts for 10% of all energy demands in Washington and is enough to power the entire city of Seattle.
What type of power plant does Columbia have?
About Columbia Generating Station Type: General Electric boiling water reactor Generation: 1,207 megawatts (gross) Location: 10 miles north of Richland, Washington
How do energy storage systems work?
Then, when the stored energy is needed, the system converts the liquid CO2 back to a gas, which powers a turbine to create electricity. The energy storage system will be built south of Portage, Wisconsin in the town of Pacific and near Alliant Energy's existing Columbia Energy Center.
Where will a new energy storage system be built?
The energy storage system will be built south of Portage, Wisconsin in the town of Pacific and near Alliant Energy's existing Columbia Energy Center. Construction is expected to begin in 2026 and be completed by the end of 2027.