Iowa consumer advocate challenges up to $3.2 billion in Alliant gas projects

A $3.2 billion question reaches regulators

An Iowa fight could influence who carries the risk for up to $3.2 billion in gas projects. The consumer advocate wants stronger proof before regulators approve Riverhawk.

Alliant says need and cost effectiveness belong in a later rate case. The timing matters because construction could advance before regulators examine alternatives, fuel expenses, and customer impacts.

The consumer advocate demands proof

Iowa’s Office of Consumer Advocate represents customers and the public interest. In a September 11 filing, it requested more information and a hearing.

The filing targets Interstate Power and Light’s application for Riverhawk, the proposed gas plant. The advocate says regulators should test the project’s necessity, cost-effectiveness, and affordability before granting its generating certificate.

Riverhawk would add 1,200 megawatts

Riverhawk would be a 1,200-megawatt gas turbine facility in Cerro Gordo County. Alliant plans to build it beside the existing Emery Generating Station.

The company says shared infrastructure could reduce costs and land impacts. If regulators approve the project, Alliant expects Riverhawk to begin operating in 2031 as a fast-acting source for high-demand periods.

Morgan Valley adds another 720 megawatts

Morgan Valley is a separate 720-megawatt gas project planned west of Cedar Rapids. Its design includes three simple-cycle combustion turbines.

Alliant says the facility would respond quickly when electricity demand rises or renewable output falls. Pending required approvals, Morgan Valley is expected to begin operating in 2030, 1 year before Riverhawk’s planned launch.

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The estimate excludes operating costs

The consumer advocate estimates Riverhawk and Morgan Valley would cost between $2.1 billion and $3.2 billion to build. That range excludes their continuing operating expenses.

Fuel, maintenance, financing, and other costs could continue after construction. Interstate Power and Light’s September 17 response did not address the advocate’s multibillion-dollar estimate, according to Iowa Capital Dispatch.

Two reviews sit at the heart of the fight

Iowa uses generating certificate dockets to review proposed power plants producing at least 25 megawatts. Riverhawk’s application is now in that process.

Alliant argues that a certificate case is not the forum in which regulators decide whether a project is prudent, necessary, and cost-effective. It says those questions belong in a separate future proceeding that determines customer rates.

Little-known fact: An economic analysis submitted by Alliant estimated Morgan Valley could support approximately 200 construction jobs and nearly $90 million in local economic output.

The advocate wants an earlier cost test

The consumer advocate says waiting for a rate case could delay scrutiny until construction advances. It wants evidence comparing Riverhawk with other generation choices.

The requested analysis would examine need, costs, fuel expenses, and customer effects. The filing says the commission should deny the certificate if Alliant cannot demonstrate that its proposal is cost-effective.

Alliant wants the hearing waived

The consumer advocate, Clean Energy Districts of Iowa, and Iowa Business Energy Coalition want testimony and a hearing. They seek a resource evaluation study.

Alliant says those objections raise legal questions that have been settled in commission cases. The utility asked regulators to waive a hearing and decide that need and cost-effectiveness fall outside the certificate proceeding.

The $3.2 billion is not a current bill

The upper estimate does not mean customers have received a $3.2 billion charge. Project costs cannot enter rates automatically after a certificate.

Alliant says regulators must review cost recovery in a future rate proceeding. The consumer advocate argues that a later review may come after construction commitments, making the timing of oversight central to the dispute.

Data center growth sharpens the stakes

Alliant reported about 3.4 gigawatts of contracted data center demand across its system in April 2026. It later forecast 60% load growth by 2031.

Critics want proof that large users are driving and paying for new capacity. Alliant says Riverhawk supports the broader grid and that existing customers will not fund new large-user growth.

Confidential rates fuel the debate

Alliant has special rate agreements with QTS for a data center in Cedar Rapids. Filings say those rates recover at least the marginal cost of service.

Alliant says the commission reviews the agreements and that the agreements protect other customers. Critics argue that confidential terms make it harder to judge whether large users cover the full cost of plants.

Fast response comes with a tradeoff

Simple-cycle gas turbines can start quickly and help meet demand peaks. Alliant says Riverhawk would support the grid when renewable output is lower.

Federal energy data show simple-cycle plants use more fuel per unit of electricity than combined-cycle plants. That makes operating frequency and gas prices important to long-term customer costs.

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Iowa’s gas buildout is already growing

Riverhawk and Morgan Valley are not Alliant’s only new gas plants in Iowa. Construction is underway on the 720-megawatt Bobcat Energy Center in Marshalltown.

Bobcat is expected to operate in 2029. Together, Bobcat, Morgan Valley, and Riverhawk would add about 2,640 megawatts if the 2 proposed facilities are approved and all 3 projects are completed.

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Do you think Alliant should prove its gas projects are affordable before construction begins, or is a later rate review enough to protect Iowa customers? Share your view in the comments.

This slideshow was made with AI assistance and human editing.

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