This bill creates a new categorical exemption in the State Environmental Policy Act (chapter 43.21C RCW) for upgrading or rebuilding existing electric powerlines within existing powerline rights-of-way. The exemption covers actions such as relocating small segments of lines within an existing right-of-way or previously disturbed lands and widening a right-of-way within previously disturbed lands only into a small additional area as needed to meet electrical standards. The exemption does not apply when exempt and nonexempt actions are part of a related series, when a lead agency determines exempt actions together could cause a probable significant adverse environmental impact, or when the work includes installation in or under lands covered by water. Utilities must notify the Department of Archaeology and Historic Preservation (DAHP) and affected federally recognized tribes before starting an exempt project; DAHP may require a coordinated survey and must ensure protection of identified archaeological, cultural, or tribal resources under chapter 27.53 RCW. Information provided by tribes is to be kept confidential under chapter 42.56 RCW. The bill defines “previously disturbed or developed” and “upgrading or rebuilding existing electric powerlines,” but the terms “small segments” and “small area” are not quantified in the provided text and the excerpt does not fully show how this exemption interacts with other SEPA provisions. The bill also amends RCW 19.280.030 to restate and specify integrated resource plan (IRP) requirements for electric utilities, adding transmission assessment requirements, a 20-year generation and transmission forecast, and a 10-year clean energy action plan (CEAP) with specified elements including evaluation of reconductoring where it would meaningfully improve system function and reliability. It requires transmission assessments to identify needs for long-term firm rights and for development, expansion, or upgrade of bulk transmission facilities. The amendment includes timing and filing references (notably an initial plan deadline stated as September 1, 2008, recurring progress reports and updates, and a provision about using a mapping tool that applies only to plans due after September 1, 2023), but the provided excerpt ends partway through a subsection and omits some subsequent text. Procedural and planning changes require utilities to incorporate the social cost of greenhouse gas emissions as a cost adder in evaluating conservation, selecting resource options, and developing IRPs and CEAPs; the commission sets that value for investor‑owned utilities and the department for consumer‑owned utilities. The bill treats certain landfill/waste methane gas and qualified biomass energy as “nonemitting resources.” It permits consumer‑owned utilities to jointly develop a CEAP with a joint operating agency or nonprofit. Utilities that do not prepare a full IRP must at minimum prepare a resource plan with 5‑ and 10‑year load estimates, identified resources, explanations for choices, and, starting December 31, 2020 and thereafter, a 10‑year plan to implement specified provisions in chapter 19.405 RCW and to account for modeled forecasts including anticipated zero-emission vehicle use and electrification plans cited in other RCWs. The bill adds procedural and transparency provisions: plans must be updated at intervals approved by the commission or department or at least every two years, final plans must be published and may require native-format data disclosure for transparency, protections for commercial records remain in place, and the commission retains authorities to approve, reject, or condition integrated system plans and to require incorporation of these requirements into certain large utility plans. The provided facts do not identify exactly which department is referenced in some provisions, do not fully define which utilities are covered in every instance, and the excerpt omits the remainder of subsection (3)(a) and any additional implementation or penalty provisions that may appear later in the bill.

If enacted, the bill makes it easier for utilities to upgrade or rebuild powerlines inside existing rights-of-way or on already disturbed land by giving those projects a categorical exemption from a full environmental review, but utilities must notify the state archaeology office and affected tribes first and may have to fund and allow archaeological surveys and protections if cultural resources are found. At the same time, utilities will have stronger and more specific planning obligations: longer-range transmission and generation forecasts, a 10-year clean energy action plan that must evaluate reconductoring and include the social cost of greenhouse gases in resource choices, and recognition of landfill/waste gas and qualified biomass as nonemitting resources; consumer-owned utilities can partner on joint plans. The groups most affected are electric utilities (investor-owned, consumer-owned, and large combination utilities), the Department of Archaeology and Historic Preservation, and federally recognized tribes. Utilities will likely face more planning and modeling work, possibly higher near-term consulting, survey, or mitigation costs and some project delays when archaeology or tribal concerns arise, but they may also realize faster environmental approvals for many routine upgrades. Including the social cost of greenhouse gases in decisions could shift utility investments toward lower-emitting options over time and change how transmission needs are met, though key details—such as what counts as a “small” relocation or area and which department sets some requirements—are not specified in the available text.