In County of Butte v. Dep’t of Wat. Resources (2022) 13 Cal.5th 612, issued on August 1, 2022, the California Supreme Court carved out a role for the California Environmental Quality Act (“CEQA”) even where the project is largely governed by a federal proceeding. The case arose in connection with the relicensing of the Oroville Dam by the Federal Energy Regulatory Commission (“FERC”). The Federal Power Act (“FPA”) (16 U.S.C. § 791, et seq.) delegates to FERC the authority to license hydroelectric dams; the FPA has “a significant preemptive sweep.” Despite a comprehensive federal process for licensing dams, the Supreme Court held that state agency review under CEQA was not entirely preempted.