The bill aims to enhance transmission capacity by amending existing laws and introducing new provisions under chapter 43.21C RCW. It establishes categorical exemptions for utility-related actions, specifically for upgrading or rebuilding electric powerlines within existing rights-of-way, provided certain conditions are met. These conditions include the absence of significant adverse environmental impacts and the requirement for utilities to notify the Department of Archaeology and Historic Preservation and relevant Indian tribes before commencing projects. The bill also clarifies definitions related to previously disturbed lands and the scope of upgrading or rebuilding electric powerlines.

Additionally, the bill amends RCW 19.280.030 to require electric utilities to develop integrated resource plans that account for various factors, including customer demand forecasts, resource assessments, and the integration of renewable resources. It emphasizes the importance of considering the social cost of greenhouse gas emissions in planning and mandates regular updates to these plans. The bill also allows for collaboration among consumer-owned utilities to develop joint clean energy action plans, ensuring a comprehensive approach to meeting the state's energy needs while maintaining environmental and cultural protections.

Statutes affected:
Original Bill: 19.280.030
Substitute Bill: 19.280.030
Engrossed Substitute: 19.280.030