Southern California Edison Company (SCE) owns and operates Huntington Lake Dam No. 1, which is part of the Big Creek Nos. 1 and 2 Hydroelectric Project. Huntington Lake Dam No. 1 is a concrete gravity arch dam that is 1,335 feet in length and 170 feet in height and impounds approximately 90,000 acre-feet of water in Huntington Lake for hydropower. On June 27, 2022, SCE applied for a water quality certification from the State Water Resource Control Board. SCE also applied for United States Army Corps of Engineers Nationwide Permits for the Project: 3(a) – Maintenance, 5 – Scientific Measuring Devices, and 13 – Bank Stabilization. The Project involves: (1) repair and replacement of the upstream and downstream valves, gates, and operators, (2) dredging of accumulated sediment and debris in front of the low-level outlet intake gates, and (3) installation of a Parshall Flume. The proposed repairs and upgrades will not result in a change to the design or function of the dam. By restoring the functionality of the low-level outlet system, the Project repairs will address public safety concerns downstream of Huntington Lake Dam. The installation of the Parshall Flume will allow flow releases to be measured accurately in accordance with minimum instream flow requirements of the Federal Energy Regulatory Commission (FERC) license for the Big Creek Hydroelectric Project Nos. 1 and 2, FERC Project No. 2175.