Wisconsin regulators on Thursday approved a one-off contract between Alliant Energy and the Meta subsidiary building a data center campus in Beaver Dam, but with a major caveat: Alliant must return with a standardized plan to power future data centers — and shield other customers from resulting costs.
The agreement bears little resemblance to the model We Energies proposed for its hyperscale data center customers in Mount Pleasant and Port Washington. That model covers all future We Energies data center customers and was approved last month with major modifications by the three-member Wisconsin Public Service Commission.
Both the PSC and ratepayer advocates expressed reservations about allowing Alliant to proceed without a standardized payment structure for data center customers. Negotiating contracts one-by-one, Commission Chair Summer Strand argued, would undermine the public’s interest in transparency and consistency.
Strand and fellow commissioners Kristy Nieto and Marcus Hawkins approved a modified version of the agreement, acknowledging that the Beaver Dam campus will open in 2027 with or without a tailored contract with Alliant. Sending the utility back to the drawing board for another year, they reasoned, could expose other customers to greater financial risk. The commissioners directed Alliant to propose a standardized payment structure for large data center customers similar to the We Energies arrangement approved last month.
Wisconsin Power and Light, an Alliant subsidiary, filed its case with the PSC last spring, months before Meta joined state and local officials in announcig its Beaver Dam data center campus.
The Beaver Dam facility, the first of its kind in Alliant’s Wisconsin service territory, is smaller than the soon-to-open Microsoft and Vantage data centers. Meta projects the facility will use 220 megawatts at peak, less than half the projected use of the Mount Pleasant and Port Washington campuses. But even that comparatively modest demand would be six to eight times the current peak for all of Beaver Dam.
In testimony to the PSC in November, Rebecca Valcq, Alliant’s assistant vice president for regulatory affairs and data center services, said the Beaver Dam campus would benefit other customers by “making more efficient use of existing infrastructure” and “spreading fixed costs” across a larger base. She also urged commissioners to consider the data center’s projected $2.1 million in annual local, state and federal tax revenue, among other economic benefits.
Alliant is a founding member of the Wisconsin Data Center Coalition, which promotes the state as a destination for data center developers.
Unlike We Energies, Alliant says it does not expect to immediately build new power plants to serve the Beaver Dam campus. Instead, Meta would purchase electricity from the same generators as the rest of Alliant’s customers. Hawkins noted on Thursday that even if the new data center doesn’t immediately require new generators, it might change the retirement timelines for Alliant’s existing power plants.
