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 existing electric powerlines within established right-of-ways. These exemptions apply to actions such as relocating small segments of powerlines or widening right-of-ways to meet current electrical standards, provided they remain within previously disturbed or developed lands. However, the exemptions do not apply if certain conditions are met, such as the presence of a series of related actions that may have significant adverse environmental impacts or if the proposed action involves construction in or under water-covered lands.

Additionally, the bill mandates that utilities notify the Department of Archaeology and Historic Preservation and relevant federally recognized Indian tribes before commencing projects that fall under the categorical exemptions. This notification aims to ensure that any archaeological, cultural, or tribal resources are identified and protected. The bill also amends RCW 19.280.030, requiring electric utilities to develop integrated resource plans that include assessments of demand forecasts, resource adequacy, and the integration of renewable resources, among other requirements. Notably, it emphasizes the importance of considering the social cost of greenhouse gas emissions in planning and decision-making processes.

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