The Iowa Utilities Board will be closed on Monday, May 29, in observance of the Memorial Day holiday. However, the IUB's electronic filing system (EFS) and IUB 24/7 will be available, and EFS filings made during these dates will be processed by staff on Tuesday, May 30, 2023.

The IUB's normal office hours are 8 a.m. to 4:30 p.m. Monday through Friday. The IUB office is closed Saturdays and Sundays and official State holidays.

For questions about EFS filings or for the IUB's web application IUB 24/7, please email