On December 9, 2019, the U.S. Supreme Court decided not to revisit the U.S. Court of Appeals for D.C. Circuit’s decision in Hoopa Valley Tribe v. FERC, 913 F.3d 1099 (2019), allowing the lower court’s ruling to stand.  The key holding of the D.C. Circuit’s opinion, which concerned the ongoing Federal Energy Regulatory Commission’s (“FERC”) relicensing of the Klamath Hydroelectric Project, is that the States of California and Oregon waived their authorities under section…