Posted by: Bonnie Phelps | March 13, 2026

500kV Transmission Line Update & You’re invited!

Proposed Transmission Line & SDG&E Meeting

We recently met with SDG&E leadership to get the latest details on the proposed 500kV transmission line project running between the existing Imperial Valley Substation and the border of San Diego and Orange Counties (Golden Pacific Powerlink Project). Here is what you need to know:

1. Route Status: Palomar Mountain

We expect SDG&E to release their preferred route for the transmission line in upcoming public meetings and, going forward, to focus primarily on that path. It is our hope and expectation it will not be Palomar Mountain, but we want to continue to prepare to respond in any event.

2. Mark Your Calendars: Upcoming Meetings

  • Virtual Forums: SDG&E will host four virtual sessions in late April and early May (two at 12:00 PM and two at 5:00 PM). They will be announced here.
  • In-Person Sessions: Additional community meetings will be held at a centralized location this summer. They will be announced here.
  • PMPO Meeting (May 23): Please plan to join us at the Pancake Breakfast/PMPO Meeting on May 23rd where SDG&E’s Director of Project Development and engineering staff will be present to share updates and answer your technical questions.

From the Save Palomar Mountain Task Force, a working group of the Palomar Mountain Planning Organization.


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