Pacificorp Submits Site-Specific Seismic Hazard Analysis for North Umpqua Hydroelectric Project

Strategic Insights -

The North Umpqua Hydroelectric Project, a major renewable energy resource, has undergone a comprehensive review of its seismic hazard analysis. Pacificorp, the project's operator, has submitted a crucial document to the Federal Energy Regulatory Commission (FERC) detailing the results of the 2025 Site-Specific Seismic Hazard Analysis (NU SHA). This analysis is a critical component in ensuring the safety and reliability of the project. The submission includes plans and schedules for revising the hazard analyses, which is a significant step in mitigating potential risks associated with seismic activity.

Key Takeaways:

  • Pacificorp has submitted a 2025 Site-Specific Seismic Hazard Analysis (NU SHA) for the North Umpqua Hydroelectric Project to the Federal Energy Regulatory Commission (FERC).
  • The analysis is a critical component in ensuring the safety and reliability of the project, especially in light of seismic activity.
  • The plan and schedule for revising the site-specific hazard analyses for the Lemolo No. 1, Toketee, Soda Springs, Clearwater No. 2, and Fish Creek Developments have been submitted.
  • The 2025 NU SHA includes a Confidential Information Notice, indicating that certain components of the document are classified as Privileged (CUI//PRIV), Protected, or Critical Energy Infrastructure Information (CUI//CEII).
  • The complete document is available for review on the FERC eLibrary at https://elibrary.ferc.gov.
  • Pacificorp has provided contact information for questions concerning the submitted documents, with Mark Reeves and Peter Martins being the points of contact.
  • The security classification of each component in the packet is identified in the enclosure tables, with specific instructions for handling classified information.

Statistics:

  • The submission includes plans and schedules for revising the site-specific hazard analyses, as indicated on March 7, 2025.
  • The revised 2025 NU SHA was transmitted to the FERC by September 5, 2025.
  • The FERC eLibrary link for the complete document is https://elibrary.ferc.gov.
  • The enclosure tables identify the security classification of each component as Privileged (CUI//PRIV), Protected, or Critical Energy Infrastructure Information (CUI//CEII).

Sources:

  • Acting Portland Regional Engineer Federal Energy Regulatory Commission (FERC PRO) - Via eLibrary at https://elibrary.ferc.gov.
  • Letter from William C. Shallenberger, Vice President, Renewable Resources, dated April 9, 2025.
  • Transmission plan and schedule for revising site-specific hazard analyses, dated March 7, 2025.