Requiring proof of adequate water supply before permitting new energy facilities.

SB 5640 requires new energy facilities in Washington to provide proof of adequate water supply before receiving permits. It directly affects developers of new energy projects, including biofuel plants, clean energy manufacturing facilities, and major electrical transmission projects (e.g., 500,000-volt lines). Applicants must submit detailed water plans showing sources, conservation methods, air-cooling alternatives, and valid water rights permits or applications to the Department of Ecology. The bill updates existing permitting rules to mandate this water supply verification as a condition for certification, replacing the previous process.