Iowa as a compute superpower

In 2020 the Duane Arnold Energy Center, Iowa's only nuclear plant, shut down. In October 2025 NextEra Energy announced that it would bring the 615-megawatt plant back, expecting it to deliver power again by early 2029, under a 25-year agreement in which Google buys its output.¹ Two Iowa power cooperatives that owned 30 percent of the plant agreed to sell their share to NextEra, which is headquartered in Florida.¹

Reopening a closed reactor is an expensive way to get electricity. That a technology company would pay for it says something about what has become scarce. It is not land in Iowa, and it is not computers. It is power.

Capacity

The physical case for Iowa is familiar. Google says it has been in Iowa since 2007, when it built its data center in Council Bluffs, and that it has invested more than $20 billion in the state since.² Meta's data center in Altoona came online in 2014.³ Microsoft operates data centers in the Des Moines area and is building more.⁴ Those are the companies' own figures and descriptions, not an audit, but the buildings are not in dispute.

Iowa's electricity explains much of it. In 2024 the state's primary source of electricity was wind, its average retail price was 9.34 cents per kilowatt-hour, ranked 45th in the country, and it generated about 70.5 million megawatt-hours while selling about 54.9 million to retail customers in the state.⁵ A state that makes more power than it sells at home, cheaply, and from wind, is exactly where a company would put a building that is mostly an electricity bill.

By that measure, "compute superpower" is fair. A lot of computing lives in Iowa.

Leverage

A superpower is supposed to have power: the ability to set terms. The oil states have it because the resource is theirs, hard to move and scarce. Hosting something is not the same as having leverage over it.

For most of the period, Iowa behaved like a host competing with other hosts. Its Department of Revenue lists sales and use tax exemptions for qualifying data centers, those investing at least $200 million, covering computers, cooling systems, power infrastructure, backup generation and the electricity itself.⁶ For data centers that began operating before June 6, 2025, those exemptions are permanent.⁶

The return to the state is harder to see than the investment. Data centers are expensive to build and cheap to staff. Microsoft says its operational Iowa data centers employ about 540 people, while a new building can take more than 1,660 construction jobs at peak.⁴ Billions in capital, hundreds of permanent jobs: the host's lasting return has to come mainly through taxes and electricity sales. Iowa exempted much of the first. Much of the second runs through MidAmerican Energy, which serves about 0.8 million retail electric customers in parts of Iowa, Illinois and South Dakota and is an indirect subsidiary of Berkshire Hathaway.⁷ What a regulated utility earns on a data center's power accrues mainly to its shareholders, and here those shareholders are not in Iowa.

Nor was the state counting much. Iowa's Department of Natural Resources says exact water use by data centers is not reported to it, because most buy water from city utilities that do not report individual customers.⁸ For years, a state supplying the water had no public ledger of how much it was giving, and until 2025 none for the power either.

2025

Then the terms moved. House File 976, signed on June 6, 2025, limited the electricity and backup-fuel exemption for new data centers to ten years in cities over 30,000 people and fifteen years elsewhere, and required data centers to register and report their electricity and backup-fuel purchases every year.⁹ The Department of Revenue's new annual report asks each location for the kilowatt-hours it bought, what it paid and how it separated data-center electricity from other uses.¹⁰ Individual reports stay confidential, but the department says anonymized aggregates may be disclosed.¹⁰

This is what a host that has started to learn its own value would do: put an end date on the subsidy for the scarce input and start measuring how much of it is used. The legislature's reasons are not in the sources read for this piece, so that reading is an interpretation, not a finding; budget pressure would explain the same change just as simply. It is also limited. Existing data centers keep their permanent exemptions.⁶ The tightening applies to newcomers, and the largest operators are already there.

Why the bargaining position might change

The national numbers say why power is the input to watch. A Lawrence Berkeley National Laboratory report, released by the Department of Energy, found that data centers used about 4.4 percent of US electricity in 2023, 176 terawatt-hours, and projected 6.7 to 12 percent by 2028, with an estimate of 325 to 580 terawatt-hours.¹¹ That 2028 estimate is between about 4.6 and 8.2 times all the electricity Iowa generated in 2024.

Two conclusions follow, pulling in opposite directions. Iowa cannot power the AI buildout by itself; its surplus is a rounding error against that demand. But when the input is scarce everywhere, every place with spare generation, a willing utility and room to build has something others want, and a place that already hosts the operators has more of it than most. Duane Arnold is the clearest sign: Google has signed on to buy 25 years of output from generation reopened in Iowa.¹ Whether Iowa gets much of the value is another matter. Under the announcement, Iowa energy customers will not bear the costs of the power Google buys, and an economic study cited in the announcement projects about 400 direct, full-time jobs in Linn County during operations.¹ The plant itself will be wholly owned by a Florida company.¹

Where this breaks

The case that Iowa was a price-taker rests partly on what it gave away, and what it gave away is not measured here. The cost of the exemptions to the state is not in the sources read for this piece, so "generous" is a judgment about terms, not a dollar figure.

Iowa may also be getting more than this piece counts: property taxes, local contracts, a larger and better-paid construction trade, the reopened plant. The companies' and the plant's economic studies say so, and they are interested parties.¹²⁴

And leverage may be the wrong frame for a state that wants to be chosen. A place that drives a hard bargain can lose the next campus to Nebraska or Texas. The 2025 law changed terms only at the margin, which may be as far as a competing host can push.

What would make it a superpower

The phrase "compute superpower" assumes that where the computing happens is where the power lies. So far the evidence points the other way. The value of computation accrues to whoever owns the models, the chips and the contracts, and the host keeps a share decided mostly by what it negotiated when it was eager.

What could change that is the thing AI is now shortest of. If electricity stays scarce, the places that can supply it gain something close to the position the slogan imagines. Iowa has started, carefully, to act as if it knows that. Whether it turns being where the compute is into having a say over it is the open question, and the next few contracts will answer it more clearly than any study.