Alliant Energy Corporation · NASDAQ:LNT
Alliant Energy — Corporate Update (2026)
28 slides from Alliant Energy's corporate update, 2026
Slide 1: Morgan Valley Energy Center
Morgan Valley Energy Center Linn County Board of Supervisors
Slide 2: Project Overview
Project Overview Key facts about the proposed Morgan Valley Energy Center. Capacity Electric Interconnection Transmission Owner 720 MW natural gas-fired generation Morgan Valley Substation ties into two ITC Midwest ITC transmission lines Natural Gas Pipeline Water Land Use Built, owned and operated
Slide 3: Regulatory Review Process
Regulatory Review Process The project is subject to a multi-layer, independent review by three separate bodies. Linn County Board of Linn County Public Health Iowa Utilities Commission Supervisors & Iowa DNR Local Zoning Application Air Permit Application Generating Certificate (GCU) The project wil
Slide 4: Transparency and Public Responses
Transparency and Public Responses We share project information publicly and respond to questions throughout the review. All questions from Linn County's Numerous filings and FAQs published June public meeting answered and on our public website posted online Public engagement Public information Ongoi
Slide 5: Evaluating the Need for New Resources
Evaluating the Need for New Resources Before proposing any project, we ask three fundamental questions to make sure it is the right thing to do for customers and communities. “Is the energy supply “Does this provide “Will it benefit reliable?” value for our communities we customers?” serve?” Reliabi
Slide 6: Energy Demand is Increasing
Energy Demand is Increasing • Electric utilities in the Midcontinent Independent System Operator (MISO) footprint must secure energy capacity sufficient to meet forecasted load with a reserve margin. • Load is growing in Alliant Energy's service territory and across MISO. Reliability obligations are
Slide 7: Resource Adequacy in the Midwest and US
Resource Adequacy in the Midwest and US Alliant Energy is in the Midwest Reliability Organization (MRO) and the resources are dispatched by the Midcontinent Independent System Operator (MISO) Meeting reliability needs relies on implementation of 50 GW of expedited resource additions Source: NERC 202
Slide 8: Topics for Further Review
Topics for Further Review Five areas where more information has been requested from Alliant Energy. Water Revised supply proposal, water use and treatment, tank location and delivery plans. Boland Farm Requested setback reductions, landowner waiver and hazard assessment. setbacks Sound Sound modelin
Slide 9: Designed to Minimize Water Use
Designed to Minimize Water Use Projected water use for the Morgan Valley Energy Center, in context. 4.2 – 9.4 million gallons About 1-2 conveyor car wash facilities Projected total water use per year Equivalent annual use Two primary uses of water Seasonal, not constant In perspective Potable water
Slide 10: Water Use in Context
Water Use in Context 97.8% of annual hours below 100 gpm of process water Even in a year with high total water use Over 80% of hours use no process water Morgan Valley Energy Center’s water use will fall below that of Linn County’s top 25 permitted well users 81.6% 9.4 MGY MVEC upper estimate Would
Slide 11: Revised Water / Wastewater Proposal
Revised Water / Wastewater Proposal We heard the community. Our proposal now relies on delivered water and onsite tank storage. STEP 1 STEP 2 STEP 3 STEP 4 Delivered water Onsite storage Project use Wastewater Water is trucked to the Held in an onsite tank Drawn from storage as Will be stored in a t
Slide 12: Water Hauling: Volumes and Seasonality
Water Hauling: Volumes and Seasonality Process-water hauling: 2–8 truckloads per day during April–October Water / timing Supply delivered to MVEC Disposal hauled from MVEC Process water 2–8 truckloads / day 1–3 truckloads / day Evaporative coolers From Prairie Creek Blowdown to CR Water April–Octobe
Slide 13: Boland Farm Setback Request
Boland Farm Setback Request The landowner waiver and engineering safety response address different questions. Requested Setbacks At Owner’s Request Engineering Review Dwelling setback: 1,000 to 650 Owner wants to remain in RFI asked about a safety feet farmhouse and continue assessment related to th
Slide 14: Sound analysis and enhancements
Sound analysis and enhancements MVEC is designed with low-sound upgrades to reduce far-field sound levels. Indoor design Enclosures Stack silencer MVEC’s indoor building envelope Additional enclosures surround Each stack includes an advanced absorbs equipment sound. the exhaust ductwork and stack. i
Slide 15: Sound levels for nearest neighbors
Sound levels for nearest neighbors Modeled sound levels for dBA and dBC comply with Linn County EU-2 zoning ordinance. Boland Farm (R1) Waiver from Boland increasing limit from 75 to 85 dBC Provided design flexibility during initial design Not for future combined cycle Ced Rel Motel (R2) Ced Rel sou
Slide 16: Sound Level Monitoring
Sound Level Monitoring EU-2 zoning requires sound evaluation before construction, after construction and throughout operation. Completed sound study included in the Pre-construction rezoning application. Sound evaluation will verify compliance after Post-construction construction. To be completed wi
Slide 17: Spill Prevention
Spill Prevention Oil containment and broader stormwater controls require coordinated design. SPCC Framework Federal rules (40 CFR Part 112) govern oil-spill prevention. SPCC plans, secondary containment, and PE certifications are required in most cases. Alliant Energy Experience 743 SPCC plans curre
Slide 18: Air Permit Review and Compliance
Air Permit Review and Compliance Alliant Energy models emissions, including startup and shutdown and completes BACT 1 Analysis analyses. July 21 filing includes emissions estimates, modeling and Best Available Control 2 Application Technology (BACT) analysis. LCPH and IDNR review the application, re
Slide 19: Air Quality Screening and Standards
Air Quality Screening and Standards PZC question: How do potential PM2.5 and NOx SMC exceedances affect the compliance demonstration? SIL SMC NAAQS Significant Impact Level Significant Monitoring National Ambient Air Quality Concentration Standards SCREENING LEVEL SCREENING LEVEL HEALTH-BASED STANDA
Slide 20: Why Use Existing Air Monitors?
Why Use Existing Air Monitors? PZC question: What air-quality evidence shows the project, as proposed, can meet applicable requirements? PM10 and PM2.5 Nitrogen Dioxide Carbon Monoxide Cedar Rapids Public Health Lake Sugema State Park Davenport monitor AQS 19-113-0040 AQS 19-177-0006 DNR: Urban data
Slide 21: Stack Design and Air Quality Compliance
Stack Design and Air Quality Compliance PZC question: Which stack parameters and downwash-related changes could alter the Major Site Plan? Submitted design The submitted air permit application identifies stack parameters, facility configuration and the emission controls incorporated into the Project
Slide 22: 2050 Goals and Resource Transition
2050 Goals and Resource Transition Morgan Valley Energy Center plays a crucial role in Alliant Energy’s long-term transition Net-zero carbon emissions by 2050 Solar ~400 MW in service; considering An aspirational and voluntary goal with an adaptable path for net-zero greenhouse gas emissions from ou
Slide 23: Current Standards and Long-Term Planning
Current Standards and Long-Term Planning MVEC is designed to meet Linn County’s current EU-2 requirements. County staff recommended approval based on those standards. 2013 Comprehensive Plan 2026 Updated EU-2 ordinance Adopted 13 years ago, the plan provides the The more recent ordinance provides sp
Slide 24: Our Commitment to the Community
Our Commitment to the Community Alliant Energy has signed the President's Ratepayer Protection Pledge and has a strong track record of meeting, and often exceeding, the requirements that protect customers, the environment and public health. Ratepayer Protection Independent Review OUR COMMITMENT TO Y
Slide 25: Appendix
SUPPORTING INFORMATION APPENDIX 25
Slide 26: Appendix: Economic Tax Update
Appendix: Economic Tax Update The updated analysis qualifies the earlier long-term local-tax illustration. Scenario Analysis Local Allocation Budget Effect Future generation and levy rates The statutory local amount Replacement taxes may reduce affect actual replacement-tax allocates taxable value a
Slide 27: Appendix: Source Record
Appendix: Source Record Principal materials supporting this discussion draft. County review PR26-0006 staff report, PZC information request, and EU-2 rezoning application. IUC filings GCU application and Farlinger, El-Zein, Myhre, and Maxted direct testimony. Air quality July 21, 2026 PSD Air Constr
Slide 28: Water Use at the Morgan Valley Energy Center
Water Use at the Morgan Valley Energy Center Simple-Cycle Facility with Closed-Loop Cooling and Turbine Inlet Air Evaporative Cooling Morgan Valley Energy Center Water Delivery and Storage (Simple-Cycle, Natural Gas-Fired) Water is delivered to the site by truck a and stored in an on-site tank. Peer