A bill for an act relating to hazardous liquid pipelines, including common carrier requirements, proceedings under the Iowa utilities commission, including commission member attendance at hearings and informational meetings, including allowing certain persons to intervene in such proceedings, including sanctions on intervenors in contested cases, and permit, permit renewal, and operation limitations, and including effective date and applicability provisions. (Formerly HF 240.) Vetoed 6-11-25.

IA HF639 aimed to regulate hazardous liquid pipelines in Iowa by establishing requirements for common carriers and outlining procedures for the Iowa Utilities Commission. It included provisions for commission member attendance at hearings, allowed certain individuals to intervene in proceedings, and set sanctions for intervenors in contested cases. The bill also addressed permits, permit renewals, and operational limitations before being vetoed on June 11, 2025.

Supporters of IA HF639 would argue that the bill was a necessary step to ensure the safe and responsible management of hazardous liquid pipelines in Iowa. They would highlight its provisions for increased oversight and transparency in the regulatory process, which would protect communities and the environment from potential risks associated with these pipelines.

Critics of IA HF639 would contend that the bill could hinder the development of essential infrastructure by imposing excessive regulations on hazardous liquid pipelines. They might argue that the veto reflects a missed opportunity for economic growth and energy security, as the bill's requirements could stifle innovation and investment in the sector.