SB 301 revises Montana law governing electric transmission lines and related utility facilities. The bill allows a public utility, or other entity subject to state certification requirements, to request a certificate of public convenience and necessity from the Public Service Commission before beginning construction of an electric transmission facility rated above 69 kilovolts. It also defines “advanced transmission technology” broadly to include underground cables, advanced conductors, high-voltage direct current systems, energy storage, monitoring tools, and other technologies the commission deems appropriate.
The bill creates optional, expedited commission review procedures and timelines for transmission projects. The commission must decide within 300 days whether a proposed facility is in the public interest, and it must consider reliability, customer access to cost-effective generation or storage, costs and benefits, and the use of advanced transmission technology. SB 301 also establishes an advanced cost-approval process for transmission lines and related facilities, under which approved costs may create a presumption of prudence in later rate proceedings if actual costs stay within approved limits. The bill states that it does not alter existing Title 75, chapter 20 siting requirements and does not require the commission to approve cost recovery.
In practical terms, the bill affects utility planning, transmission siting, and future ratemaking by giving utilities a clearer path to early commission approval and potentially reducing later disputes over prudence for certain project costs. It also interacts with Department of Environmental Quality certification review by allowing a commission certificate to satisfy some siting application requirements when applicable. The act takes effect immediately upon passage and approval.
The overall sentiment appears strongly favorable. The bill advanced through both chambers with unanimous or near-unanimous votes at multiple stages, including unanimous Senate passage and strong House concurrence, suggesting broad legislative support for faster transmission development and grid modernization. The findings in the bill emphasize reliability, wildfire risk reduction, and congestion relief as reasons for the legislation.
The main points of contention, as reflected in the text and amendments, center on how much authority the Public Service Commission should have over transmission approval and cost recovery, and how to balance expedited infrastructure development against ratepayer protections. The bill preserves existing environmental and siting law, and it explicitly says commission approval does not guarantee cost recovery, indicating concern about limiting utility cost pass-through and maintaining oversight of reasonable rates.
SB 301 amends Montana utility and transmission facility law by adding a new framework in Title 69, chapter 4, part 1 for pre-construction commission certification and optional advanced cost approval for electric transmission projects above 69 kilovolts. It also affects the relationship between the Public Service Commission and the Department of Environmental Quality by allowing a commission-issued certificate of public convenience and necessity to satisfy certain siting-related requirements under Title 75, chapter 20, when applicable. The bill authorizes rulemaking by the commission and establishes new procedural deadlines that could speed approval of transmission infrastructure while preserving existing siting and cost-recovery standards.
The legislative sentiment was overwhelmingly supportive. The bill passed committee and floor votes with strong margins, including several unanimous votes in the Senate and near-unanimous final passage in both chambers. The bill’s findings and structure show a policy preference for accelerating transmission upgrades, improving reliability, and addressing congestion and wildfire risk, while still maintaining commission oversight of costs and ratepayer impacts.
The principal tension in SB 301 is between expedited transmission development and regulatory safeguards for ratepayers and environmental review. Supporters appear to favor faster approval timelines, broader use of advanced transmission technology, and early cost certainty for utilities. Any concerns likely focused on preserving the Public Service Commission’s discretion, ensuring that the Department of Environmental Quality’s siting authority is not displaced, and preventing automatic cost recovery for projects that may not be prudent or fully justified. The bill addresses these concerns by stating that it does not alter Title 75 siting requirements and does not require cost-recovery approval.