Iowa Clean Energy Group Presses Alliant on Data Center Costs

What's happening in Iowa

A fight over who pays for Iowa's data-center boom has moved into public view, with a clean-energy advocacy group accusing Alliant Energy of using confidential contracts and a regulatory sequencing quirk to shift financial risk from tech companies onto ordinary ratepayers. Iowa Business for Clean Energy, led by executive director Bob Rafferty, said in a news release that Alliant is exploiting "loopholes" in state law to build new natural-gas "peaker" plants tied to data-center growth without first proving the projects serve the public interest 16. Alliant has pushed back firmly, insisting existing customers will not subsidize new large energy users and that big customers help spread costs across a wider base 1614.

The dispute centers on three proposed gas plants: the Morgan Valley Energy Center near Cedar Rapids, the Bobcat Energy Center near Marshalltown, and the Riverhawk Energy Center in Cerro Gordo County 614. Alliant maintains these are general reliability investments, not data-center-specific projects, even as its own earnings disclosures show 3.4 gigawatts of contracted data-center demand and a projected 60% load growth by 2031 614. Yahoo News adds a dollar figure to the fight, reporting that Iowa Business for Clean Energy pegs the buildout at roughly $3.5 billion and characterizes it as an eightfold increase in Alliant's Iowa peaker capacity 15.

The regulatory sequencing problem

At the heart of Rafferty's complaint is timing. He argues Iowa law lets Alliant build the plants before the Iowa Utilities Commission ever determines whether they're the best option for ratepayers — that scrutiny doesn't arrive until a future rate case, by which point the infrastructure already exists 1615. Alliant counters that costs aren't automatically loaded onto bills; they still require IUC review in a later proceeding, and a five-year base-rate freeze protects customers in the meantime 615. Growing Iowa's Economy, a coalition that includes Alliant among roughly 40 members, argues it's misleading to suggest billions could simply appear on household bills without oversight 615.

A parallel controversy involves confidential "Individual Customer Rate" agreements Alliant has filed with the IUC covering QTS's Cedar Rapids data-center campus. These agreements are designed to recover at least the marginal cost of serving a customer — not necessarily the full cost of new generation, transmission and infrastructure built to support it 6. Rafferty, citing Lazard's levelized-cost data, argues marginal costs could run roughly half of what it actually costs to build and operate a peaker plant, leaving the gap exposed to ordinary ratepayers if projected data-center usage doesn't pan out 615. Alliant says the opposite is true — that its agreements ensure large users pay the full cost of their own growth, with protections standard tariffs don't offer 6.

Is gas even the right comparison?

Lazard's cost analysis, cited across the reporting, puts new gas peaking generation at $144 to $276 per megawatt-hour, averaging near $210 — a figure Iowa Business for Clean Energy uses to argue peakers are the most expensive way to add capacity 16814. Growing Iowa's Economy disputes the comparison itself, noting peaker plants are built for occasional, rapid dispatch during demand spikes, not continuous output, so measuring them against baseload resources understates their value 6. Alliant's own filings for the Morgan Valley plant describe its operation as contingent on seasonal loads, market conditions and the availability of solar and battery capacity — framing gas as a complement to renewables rather than a replacement 614.

That framing lines up with what Iowa's utilities are simultaneously building elsewhere. MidAmerican has approval for up to 800 MW of new solar, Alliant for up to 1,000 MW of new wind, and Alliant's territory is expected to gain at least 400 MW of battery storage 7. Alliant's Wever battery project in southeastern Iowa is already operating, storing solar power for release during high-demand periods, with capacity to power roughly 100,000 homes for four hours 9. Elsewhere in the Midwest, longer-duration storage is advancing too: Form Energy's iron-air batteries, capable of 100-hour discharge, are set to support a Google data center in Minnesota through a 300-MW Xcel Energy deployment beginning in 2028 10. Startups like Redwood Materials, repurposing second-life EV batteries, are also racing to offer utilities and data-center developers cheaper storage alternatives to new gas capacity 11.

Why data centers are flooding into Iowa in the first place

Iowa's appeal to hyperscale developers rests on cheap land, extensive fiber, generous tax incentives and, above all, wind power that now supplies about 60% of the state's electricity — the highest share of any state 12. Google, Microsoft, Meta and Apple have collectively invested nearly $17 billion in Iowa campuses, with Google alone announcing another $7 billion over two years 12. A resource hub compiled by Clean Energy Districts counts roughly 1,246 MW of large operational hyperscale capacity already running in the state and another 3,750 MW planned or under construction, alongside a proposed gas-fired pipeline of nearly 3,845 MW across Alliant, MidAmerican and cooperative territory 7. That would more than double the roughly 3,264 MW of gas capacity the two big investor-owned utilities already operate 7.

Google is also financing the restart of the Duane Arnold nuclear plant near Palo, signing a 25-year power agreement tied to the roughly 600-MW reactor — a project one Iowa-focused site frames as the financial anchor bringing back the state's only nuclear baseload generation since 2020 13. That restart isn't without cost: Clean Energy Districts estimates it would draw 8.1 to 9.6 million gallons of water daily from the Cedar River 7.

Where the reporting agrees

Every outlet covering the Alliant dispute directly — KCCI, Iowa Capital Dispatch, KCRG and Yahoo — agrees on the core shape of the conflict: Iowa Business for Clean Energy says Alliant is using data centers as cover to build gas peaker plants under confidential rate deals, while Alliant insists existing customers are shielded and new large users pay their own way 161415. All four also identify the same three plants by name and location, cite the same 3.4-gigawatt contracted data-center demand figure, and reference the same Lazard levelized-cost data to frame peakers as an expensive generation choice 161415. There's also consistent agreement, extending to the Clean Energy Districts resource hub and Inside Climate News, that Iowa's wind resources and low electricity rates are what drew hyperscale developers to the state in the first place 712.

Where it doesn't

The clearest divergence is in specificity and dollar figures. Yahoo News is alone in attaching a $3.5 billion price tag to the buildout and describing it as an "eightfold increase" in Alliant's peaker capacity — both figures attributed to Iowa Business for Clean Energy rather than independently verified utility cost filings 15. KCCI, Iowa Capital Dispatch and KCRG report the same underlying dispute without repeating those specific numbers, sticking closer to the plant-by-plant megawatt figures and the marginal-cost argument 1614.

Framing also differs. Iowa Capital Dispatch's account reads as the most complete, incorporating direct statements from Growing Iowa's Economy spokesperson Jesse Harris defending the existing regulatory protections — a voice that gets less room in KCCI's and KCRG's versions, which compress the same material 1614. The Clean Energy Districts hub takes a broader advocacy posture, situating the Alliant fight inside wider concerns about water use, tax-incentive transparency and a 60% projected increase in Alliant's statewide load, while noting that a 2026 bill requiring public energy and water reporting for data centers failed to advance — a legislative detail none of the news outlets mention 7. Inside Climate News, meanwhile, is the only source connecting this fight to federal policy, reporting that the One Big Beautiful Bill Act's cuts to renewable-energy incentives could raise Iowa electricity rates by 14 to 26 percent and potentially push future data-center investment to other states 12.

What the evidence supports

The throughline across every account is that the actual dispute is not whether data centers will pay something — both sides agree they will — but whether confidential contracts recover the full long-term cost of the infrastructure built to serve them, and whether the Iowa Utilities Commission's after-the-fact review comes too late to matter once plants are already under construction. Alliant's own filings, which describe peaker output as contingent on seasonal demand and renewable availability, support the utility's claim that gas is being used as flexible backup rather than a wholesale substitute for clean generation. But Alliant has not published the terms of its individual customer rate agreements, and no outlet reports independent verification that those contracts cover full infrastructure costs rather than marginal energy costs alone. Until that confidentiality is resolved, Rafferty's core transparency argument — that ratepayers can't evaluate a deal they aren't allowed to see — stands unrebutted on the facts as reported, regardless of which side's framing of "who benefits" one finds more persuasive.