Pacific Gas and Electric Company Submits Updated Operating Procedure Manual for Halsey Afterbay Dam

Pacific Gas and Electric Company (PG&E) has completed the update of the operating procedure manual (OPM) for Halsey Afterbay Dam, a part of the Drum-Spaulding Hydroelectric Project, Federal Energy Regulatory Commission (FERC) No. 2310. The updated OPM addresses Recommendation 1 (R-1) from the sixth 5-year Part 12D safety inspection report, which was dated November 2023. PG&E's efforts to address R-1 are detailed in the summary and conclusion provided in the letter, and the updated OPM is included as an enclosure.

Key Takeaways:

• PG&E has submitted an updated operating procedure manual for Halsey Afterbay Dam, addressing Recommendation 1 from the sixth 5-year Part 12D safety inspection report.
• The updated OPM is provided in Enclosure 2 of the letter, and it includes the changes made to address R-1.
• PG&E believes that R-1 has been satisfactorily addressed based on the information enclosed with the letter.
• Contact information is provided for PG&E staff members who can be reached for technical and general questions regarding the update.
• The updated OPM is part of the Drum-Spaulding Hydroelectric Project, FERC No. 2310.

Statistics:

• The sixth 5-year Part 12D safety inspection report was dated November 2023.
• PG&E submitted its original plans and schedules for addressing R-1 in a letter to FERC dated January 30, 2024.
• PG&E's most recent letter regarding R-1 was submitted on September 26, 2024.
• The updated OPM is dated July 30, 2025.

Sources:

• Pacific Gas and Electric Company. (August 2025). Letter to Frank L. Blackett. (Exact date)
• Federal Energy Regulatory Commission. (2023). Sixth 5-year Part 12D Safety Inspection Report. (Exact date)
• PG&E. (January 30, 2024). Letter to FERC regarding plans and schedules for addressing Recommendation 1.
• PG&E. (September 26, 2024). Letter regarding update on Recommendation 1.