Southern California Edison Submits Monthly Construction Report for Big Creek Dam No. 1 LLOV Replacement Project

Strategic Insights -

As part of its Big Creek No. 1 and No. 2 Hydroelectric Project (FERC No. 2175), Southern California Edison (SCE) has been working on the Low-Level Outlet Valve (LLOV) Replacement Project for Big Creek Dam No. 1. In response to a letter from the Federal Energy Regulatory Commission (FERC) dated August 16, 2024, SCE has begun submitting monthly construction reports to provide FERC with timely information on construction progress. This letter presents SCE's first monthly construction report for the month of July 2025, detailing the construction work activities completed during that time.

Key Takeaways:

  • The project aims to replace the Low-Level Outlet Valve (LLOV) at Big Creek Dam No. 1 as part of the Big Creek No. 1 and No. 2 Hydroelectric Project (FERC No. 2175).
  • SCE is submitting monthly construction reports to FERC to provide timely information on construction progress, as requested in a letter dated August 16, 2024.
  • The first monthly construction report for the month of July 2025 has been submitted and reviewed and approved by SCE's Dam & Public Safety Department.
  • The project is part of SCE's efforts to maintain and improve its facilities, including the Big Creek Dam No. 1 facility, with appreciation expressed for FERC's continued support.
  • The construction report has been reviewed and approved by SCE's Dam & Public Safety Department and can be requested by contacting Douglas Raigosa at 626-260-1723 or douglas.raigosa@sce.com.

Statistics:

  • The project is part of the Big Creek No. 1 and No. 2 Hydroelectric Project (FERC No. 2175).
  • The LLOV Replacement Project is the focus of the monthly construction report.
  • No specific statistics or numerical data are provided in the report.
  • The project involves the replacement of the Low-Level Outlet Valve (LLOV) at Big Creek Dam No. 1.
  • SCE is responsible for maintaining and improving its facilities, including the Big Creek Dam No. 1 facility.

Sources:

  • August 16, 2024, Letter from Mr. Frank L. Blackett, P.E., Regional Engineer, Federal Energy Regulatory Commission to Mr. Wayne P. Allen, Principal Manager, Southern California Edison, titled, "Huntington Lake No. 1 Dam Low-Level Outlet Valve Replacement Project Response to Request for Work Authorization Comments".
  • Document submitted to FERC on August 14, 2025, titled "Dam 1 LLOV July 2025 Monthly Construction Report (CUI//CEII)".