LNT · 10-Q · 2026Q3 · Full report
Generation Investment Plan
ALLIANT ENERGY CORP · 2026-10-30 · Importance 58 · Surprise 42 · In source text
Alliant Energy plans over the next six years to develop or acquire approximately 2,800 MW of natural gas resources, 1,300 MW of energy storage, and 1,300 MW of renewable generation, while also improving existing gas-fired units and refurbishing wind farms. In March 2026, the Iowa Utilities Commission (IUC) approved advance rate-making principles for up to 1,000 MW of IPL wind generation, with a fixed cost cap of $3,020 per kilowatt including AFUDC and transmission costs. IPL filed applications in 2026 for gas generation and energy storage projects in Iowa, with IUC decisions expected from the fourth quarter of 2026 through the second quarter of 2027; WPL also received Wisconsin Public Service Commission (PSCW) authorization for the 153 MW Bent Tree North wind farm and expects a decision on Riverside capacity improvements in the second quarter of 2027. In October 2026, the PSCW authorized WPL to construct a 2 billion cubic feet liquefied natural gas facility in Rock County, Wisconsin.
Key facts
- Over the next six years, Alliant Energy plans to develop and/or acquire approximately 2,800 MW of new natural gas resources, 1,300 MW of new energy storage, 1,300 MW of new renewable generation, improve approximately 280 MW at existing natural gas-fired EGUs, and refurbish approximately 450 MW of existing wind farms.
- In March 2026, the IUC approved advance rate-making principles for IPL for up to 1,000 MW of new wind generation in Iowa, with a fixed cost cap of $3,020 per kilowatt including AFUDC and transmission costs.
- WPL plans to continue coal operations at Edgewater Unit 5 (414 MW) and Columbia Units 1 and 2 (595 MW aggregate) at least through 2030.
- IPL and WPL’s renewable project development costs may not be recoverable if projects are delayed, modified or discontinued due to changes in customer interest, market conditions, approvals, permitting, interconnection arrangements, or other economic and operational factors.
Impact estimates
| metric | direction | stage | expected | basis |
|---|---|---|---|---|
| cash | negative | probable | -2.9% | In March 2026, the IUC approved advance rate-making principles for IPL for up to 1,000 MW of new wind generation in Iowa, with a fixed… |
| assets | positive | probable | +2.9% | In March 2026, the IUC approved advance rate-making principles for IPL for up to 1,000 MW of new wind generation in Iowa, with a fixed… |
| cash | negative | contingent | — | Over the next six years, Alliant Energy plans to develop and/or acquire approximately 2,800 MW of new natural gas resources, 1,300 MW of… |
| assets | positive | contingent | — | Over the next six years, Alliant Energy plans to develop and/or acquire approximately 2,800 MW of new natural gas resources, 1,300 MW of… |