Iowa Utilities Commission

• Sep 4, 2026

  Erik M. HellandDeparture

  Erik M. Helland departed from the Iowa Utilities Commission.

• May 19, 2025

  Sarah MartzChair designation · Chair

  Gov. Kim Reynolds appointed Sarah Martz as Chair of the Iowa Utilities Commission; she had been serving as a commissioner since May 2023.

Address

1375 E. Court Avenue, Des Moines, IA 50319

Phone

(515) 725-7300

Website

iuc.iowa.gov ↗

Utility landscape

• MidAmerican Energy Company IOU

  Western and central Iowa, including Des Moines metro; serves approximately 800,000 electric and 780,000 gas customers

  Berkshire Hathaway subsidiary with an aggressive renewable portfolio that now exceeds 90% wind generation capacity; has historically avoided general rate cases through infrastructure rider mechanisms but filed a significant electric rate case in 2024 seeking recovery of grid modernization and transmission investments.

• Interstate Power and Light Company (Alliant Energy Iowa) IOU

  Eastern and southern Iowa, serving approximately 500,000 electric and 225,000 gas customers across Cedar Rapids, Waterloo, and surrounding regions

  Filed a 2024 electric rate case seeking substantial increases tied to solar buildout, transmission cost recovery, and the Cedar Rapids Smart Energy project; the IUC approved a settlement in early 2025 with modifications to proposed renewable energy riders.

• Black Hills Energy Iowa IOU

  Northwest Iowa natural gas distribution, serving approximately 118,000 customers including Sioux City

  Focused on pipeline integrity and gas system modernization investments; has pursued tracker mechanisms for infrastructure replacement and is subject to ongoing scrutiny regarding methane leak reduction commitments under Iowa's evolving clean energy framework.

• Corn Belt Power Cooperative coop

  North-central Iowa generation and transmission cooperative serving 11 member distribution cooperatives

  As a G&T cooperative, subject to FERC jurisdiction for wholesale rates but interfaces with IUC on retail distribution matters; pursuing wind and solar integration into its generation mix to meet member load requirements and comply with evolving RTO capacity obligations.

• Cedar Falls Utilities muni

  Cedar Falls municipal utility providing electric, gas, water, and broadband services to approximately 40,000 customers

  Operates as a full-service municipal utility with its own broadband network, positioning it as a policy model in IUC and legislative discussions about municipal broadband expansion; electric rates subject to city council oversight rather than IUC general rate case jurisdiction.

• Iowa Association of Municipal Utilities (representative: Muscatine Power and Water) muni

  Muscatine, Iowa; provides electric, water, and internet services to approximately 24,000 electric customers

  Muscatine Power and Water has drawn regulatory attention for its coal plant transition timeline and associated stranded cost questions; participates in MISO capacity markets and faces pressure to accelerate decarbonization while managing affordability for a largely industrial customer base.

Key issues

• MidAmerican Energy grid modernization rate recovery: The IUC is adjudicating MidAmerican's request to recover costs associated with its Advanced Grid Infrastructure program through a dedicated rider, raising contested questions about the appropriate rate base treatment of smart meter deployments, distribution automation, and cybersecurity upgrades across its Iowa service territory.
• Alliant Energy (IPL) renewable energy rider compliance and solar procurement review: Following the 2025 rate case settlement, the IUC is monitoring IPL's compliance with approved solar project timelines and cost caps; interveners including the Office of Consumer Advocate have flagged concerns about cost overruns at utility-owned solar facilities that could trigger reopener provisions.
• Wind energy repowering and property tax siting conflicts: Increased wind farm repowering applications before the IUC have generated contested dockets involving county-level zoning preemption questions, setback requirements under HF 2311, and landowner easement renegotiations, creating a complex intersection of commission jurisdiction and local government authority.
• Natural gas infrastructure and supply reliability post-Winter Storm Elliott: The IUC has an open docket examining gas utility preparedness standards following supply disruptions during extreme cold events; potential rulemaking to require weatherization protocols and firm supply contracts for LDCs serving Iowa customers is under staff review as of mid-2025.
• Electric vehicle charging infrastructure cost allocation: Both MidAmerican and IPL have pending or recently-approved EV make-ready tariff proposals before the IUC; contested issues include cost socialization across all ratepayers versus direct assignment to EV customers, and the commission's 2025 policy statement on utility EV program eligibility criteria is subject to reconsideration petitions.

Upcoming

• 2026-09-15

  Estimated deadline for post-hearing briefs in MidAmerican Energy's Advanced Grid Infrastructure rider docket (IUC Docket No. RPU-2024-XXXX); commission order expected in Q4 2026 based on standard 210-day adjudicative timeline from hearing completion.

• 2026-10-01

  Estimated IUC filing deadline for IPL/Alliant Energy's annual renewable energy rider true-up report, reconciling actual solar project costs against commission-approved forecasts; Office of Consumer Advocate review period to follow with potential intervention on cost overrun recovery.

• 2026-11-12

  Estimated IUC technical conference on proposed natural gas utility weatherization and supply reliability rulemaking; commission staff anticipated to circulate a draft rule for public comment in advance of a formal notice of intended action under Iowa APA Chapter 17A.

• 2027-01-20

  Estimated anticipated IUC final order in pending EV charging infrastructure cost allocation docket; timing aligns with commission's stated goal of issuing definitive EV tariff policy guidance before the 2027 Iowa legislative session to inform any statutory changes to utility program authority.