DOE Lends Alliant $5.1 Billion for 2.6 GW in Iowa and Wisconsin, Led by Gas Where the 2025 Offer Backed Wind
- FERC & Federal News Policy & Markets
Marin Holt
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- 9 minutes read
- Loan package: $5.1 billion (about $3.5 billion IPL, about $1.6 billion WPL)
- Capacity: more than 2.6 GW new or upgraded
- Mix: approximately 1,500 MW gas, 240 MW upgrades, approximately 1,000 MW batteries
- Claimed savings: $1.2 billion over the life of the loans
- Earlier offer: exceeding $3 billion, January 2025, wind and storage
The U.S. Department of Energy closed a $5.1 billion loan package to Alliant Energy on October 28. The money goes to two Alliant utilities, Interstate Power and Light in Iowa and Wisconsin Power and Light. DOE says the loans will add more than 2.6 GW of new or upgraded generation. The list covers new natural gas-fired power plants, energy storage systems, and upgrades to existing generation facilities.
An Alliant filing with the Securities and Exchange Commission splits the package, Utility Dive reported. About $3.5 billion goes to Interstate Power and Light and about $1.6 billion goes to Wisconsin Power & Light. Reuters reported that the loans run 30 years. DOE’s Office of Energy Dominance Financing (EDF), the renamed Loan Programs Office, made the loans.
What the Package Contains
The EDF project page gives the mix. It lists approximately 1,500 MW of new natural gas generation and 240 MW of increased capacity at existing generating units. It also lists approximately 1,000 MW of battery energy storage systems and 2 billion cubic feet of liquefied natural gas storage. EDF puts construction jobs at 1,630 and permanent jobs at 46.
The package is not the one first offered to Alliant. In January 2025, the Loan Programs Office outlined conditional commitments exceeding $3 billion for approximately 2,000 megawatts of wind generation and battery storage in Iowa and Wisconsin, Construction Review Online reported. The closed package is larger, and gas now leads it. Power Technology reported that energy storage stays eligible under both the original and the current loan agreements.
Alliant has announced three Iowa gas projects: the Bobcat Energy Center in Marshalltown, the Morgan Valley Energy Center in Linn County and the Riverhawk Energy Center in Cerro Gordo County. Construction Review Online cautioned that the loan close does not confirm that every listed project has completed construction or entered service.
The Savings Claims
DOE says the projects will deliver more than $1 billion in electricity cost savings. The EDF page uses a different figure: $1.2 billion over the life of the loans. It adds that the loans could cut Alliant’s interest expense by more than $46 million per year, subject to project advancement, qualification and financing terms. Alliant CEO Lisa Barton said the financing lowers the cost of building generation, according to Reuters. Power Technology reported that DOE itself said any decrease in electricity prices will take many years to arrive.
DOE and Reuters also differ on homes served. DOE’s release says the capacity equals nearly 2 million homes. Reuters quoted nearly 1.8 million homes. Alliant serves close to one million electric customers and about 430,000 retail gas customers, Power Technology reported.
The Alliant close came a day after EDF offered Constellation Energy a conditional loan commitment of up to $5 billion for nuclear uprates, which would add almost 1.1 GW. DOE calls the Alliant deal the administration’s tenth financial close, and the sixth and seventh utility financing in the program. EDF has also announced loans to AEP Texas, Southern Co. and DTE Gas this year.
Why It Matters
Federal credit now backs gas plants, a class of project that Power Technology says has typically secured conventional financing. For Iowa and Wisconsin customers, the test is the rate case. A cheaper loan lowers the carrying cost only if regulators pass the interest savings through, and EDF attaches conditions to its interest-expense estimate. The two savings numbers in DOE’s own materials do not match, and neither comes with a published method.
The mix also matters for storage developers in MISO. Battery storage survived the switch from the wind-led 2025 offer. The package does not name sites, sizes or in-service dates for those batteries. Until Alliant files project-level schedules, the capacity total is a financing ceiling, not a construction plan.
Critical Perspective
The closed package replaces a January 2025 offer for approximately 2,000 megawatts of wind and storage with one led by approximately 1,500 MW of new gas. DOE’s release and its own project page then quote different savings, more than $1 billion and $1.2 billion, and neither shows a method. EDF ties the interest cut of more than $46 million per year to project advancement, qualification and financing terms, and the release gives no in-service date for any of the three Iowa gas plants. If state regulators approve these plants partly because federal money is cheaper, who carries the fuel and construction risk while the savings remain a projection over 30 years?
Sources
- U.S. Department of Energy: Energy Department Closes $5.1 Billion Loan to Lower Electricity Costs and Strengthen Grid Reliability in Iowa and Wisconsin (Oct 28, 2026)
- DOE Office of Energy Dominance Financing project page: Alliant (Oct 2026)
- Utility Dive: DOE announces $10.1B in loans to Constellation, Alliant, for 3.7 GW (Oct 2026)
- Reuters via WHBL: US closes $5.1 billion loan to Alliant Energy for new gas power generation, energy storage (Oct 28, 2026)
- Power Technology via Yahoo Finance: US DOE approves $5.1bn loan to Alliant Energy for power projects (Oct 28, 2026)
- Construction Review Online: DOE Closes $5.1 Billion Loan Package for Alliant Energy’s Gas, Battery and Grid Projects (Oct 2026)
