Save Palomar Mountain!!
Home
500kV line NEWS
FAQs
People are talking
Donation
About Us
Experience Palomar
Resources
Save Palomar Mountain!!
Home
500kV line NEWS
FAQs
People are talking
Donation
About Us
Experience Palomar
Resources
More
  • Home
  • 500kV line NEWS
  • FAQs
  • People are talking
  • Donation
  • About Us
  • Experience Palomar
  • Resources
  • Home
  • 500kV line NEWS
  • FAQs
  • People are talking
  • Donation
  • About Us
  • Experience Palomar
  • Resources

Have You Heard?

Have You Heard?Have You Heard?Have You Heard?

A 500 kV transmission line may have cut through Palomar to bring power to LA Basin from AZ/NM. We are opposing this route.

Click here to share your testimonials
Click here to see the 2,100+ name of our supporters

Have You Heard?

Have You Heard?Have You Heard?Have You Heard?

A 500 kV transmission line may have cut through Palomar to bring power to LA Basin from AZ/NM. We are opposing this route.

Click here to share your testimonials
Click here to see the 2,100+ name of our supporters

Click HERE to sign our petition

Click HERE to sign our petition

Click HERE to sign our petition

Click HERE to sign our petition

Click HERE to sign our petition

Click HERE to sign our petition

Click here for a TEMPLATE letter to send to CPUC
Palomar Mountain Island in the SKy

Palomar Mountain: The Island in the Sky

 Our pristine, mixed conifer forest and lush meadows, unmatched in the southwest, is a significant draw for many.  People from around the world come to enjoy this Nature gem.

Find out more

What are the routes for the 500 kV Golden Powerlink?

Preliminary Route Corridor per SDGE on April 2026

Go to the SDGE project page

Alternative Route (in blue) per SDGE on August 2026

The green of Palomar Mountain, below the blue line, should say it all on the major environmental and fire risk impacts.

Learn more

A new 500 kV transmission line was proposed to deliver power from Arizona and New Mexico to the Los Angeles Basin. 

In April 2024, Horizon West Transmission (a NextEra Energy subsidiary) was named the project sponsor; however, as of August 2025, project leadership has transitioned to SDG&E.


For the past two years, our Save Palomar Mountain Task Force has worked tirelessly to prevent any proposed routes from crossing Palomar Mountain. Our mission is to preserve this "Island in the Sky" for the enjoyment of visitors from Southern California and around the world.

Read more on the project update on this dedicated SDGE website

This project doesn't align with the CPUC mission:

" To empower California through access to safe, clean, and affordable utility services and infrastructure "

Would it be SAFE? NO

Damages of high voltage transmission lines

High Wind Potential Damages

 Palomar Mountain's history of strong 100 +mph winds is very similar to what happened in Houston, Texas May 2024.  Palomar Mountain has had small tornado touch-downs that have turned huge oak branches into kindling and split and toppled trees hundreds of years old in seconds.  Having 500,000 Volt transmission lines on a small 6000 foot elevation mountain makes no sense.  

Fire risk due to high voltage transmission line in forested and mountain area

Wildfire Impact

High voltage transmission lines can be a severe fire danger.  According to  CalFire, "a faulty transmission line" caused the Paradise Fire in 2018 that burned over 150,000 acres and killed 89 people. But this is not the only fire created by high voltage lines. As recently as January 2025, the Eaton Fire in Alta Dena, killed 19 people. Click here for a more complete list. The same thing could happen here with our 100 mph winds out of the rim where this line might cut through. Let's not forget, Palomar is on the Elsinore fault line and are subject to earthquakes, which could lead to tower collapses!

Native indian griding holes

Historic Native American Sites

Palomar has so many historic Indian sites with hundreds of grinding holes and areas where many pottery shards and arrowheads have been found. This picture shows some the grinding holes that can be found in the State Park, but you can find many others all over Palomar Mountain, especially on the rim where the native women used to enjoy the breath taking views of the ocean.

Endangered butterfly

Endangered and Protected Species

Numerous endangered species are native to Palomar Mountain. We have nesting habitat for bold and golden eagles. You will find the Laguna Skipper Butterfly in meadows and around the ponds. We also have plants, frogs, birds and other sensitive species. More to come on this issue, please stay tuned for updates.

Would it be CLEAN? NO

High Voltage transmission line right of way in dense forest

Clear-cutting destruction

Our old-growth forest, a LUNG for San Diego County, would be permanently scarred by the need to clear-cut at least 200ft wide right-of-way. These would need to be maintained with pesticides that would go straight into our aquafer from which we get our community water.

A little bit of greenwashing?

CAISO is pushing for this type of project to bring clean energy to CA. The Imperial Valley Substation would receive Solar from Arizona or WInd energy from New Mexico. Is SDGE trying to make us believe that the energy produced at low cost in Mexicali by the SEMPRA managed Natureal Gas Burning plant [conveniently already connected to this substation thank to a 230kV lines] wouldn't go onto the Golden Pacific Powerlink?

Would it be AFFORDABLE? NO

There is a precedent for cost and possible alternatives

 The Serrano-Del Amo-Mesa 500-kilovolt (kV) Transmission Reinforcement project was officially canceled by the California Independent System Operator (CAISO) Board of Governors in May 2026.

COST:  When the project was originally approved in the 2022-2023 planning cycle, the estimated cost was $1.125 billion. However, after Southern California Edison (SCE) completed its detailed engineering phase, updated cost projections skyrocketed to $5 billion—nearly a 350% increase.  What will it be for the Golden Pacific Powerlink with a starting price tag of $1.6-2.3B?


ALTERNATIVES which SDGE should consider for this project:

 

  • Smaller, Lower-Cost Upgrades: CAISO shifted focus toward 12 discrete reconductoring projects across the state. These upgrades increase existing line capacity instead of requiring new, disruptive corridors.
  • Advanced Conductors & Grid-Enhancing Technologies (GETs): Three of the proposed reconductoring projects utilize advanced conductors to maximize power flow over existing infrastructure safely.
  • Increased Reliance on Energy Storage: CAISO is placing a heavier emphasis on modeling and deploying strategic battery storage development (such as modeling ~2 GW of baseline batteries in the regional base cases) to manage grid congestion locally.




Template for your letter to CPUC

We are providing in the attached a template for a letter that you can send to CPUC. We recommend that you modify it, perhaps using only one or two of the points and/or add your own perspective or additional issues. To send it you have a few options:

 

  1. The simplest and easiest way is to submit your letter electronically to: public.advisor@cpuc.ca.gov.
  2. You can also postal mail it to:
    California Public Utilities Commission
    Public Advisor's Office
    505 Van Ness Avenue
    San Francisco, CA 94102

Resident Letters to the CPUC [one page] (pdf)

Download

Palomar Mountain needs the help of the Public!


Tell us why you believe this very unique old growth forest with the beauty of the Four Seasons, should  be preserved for future generations. 

As someone who appreciates Palomar, you likely have lots of reasons you love this Mountain. Please share why it is so special to you, your family traditions and memories. 


Do you have a photo to include?  We get even more points when there are people in the photos. Then, please share with all your social media groups and ask them to do the same!   YOU are much appreciated! 


And don't forget to share this call for support with your various networks. Forward this URL, or download the flyer at the bottom of this page to post where people can use the QR code to participate to protecting Palomar Mountain.

Share your comments on Palomar Mountain and your thoughts on the prospect of a high voltage transmission line on the mountain:

Your images
Attachments (0)

This site is protected by reCAPTCHA and the Google Privacy Policy and Terms of Service apply.

Connect With Us - info@savepalomarmountain.org

Copyright © 2026 Save Palomar Mountain - All Rights Reserved. 


Privacy Policy


Powered by

  • Privacy Policy

This website uses cookies.

We use cookies to analyze website traffic and optimize your website experience. By accepting our use of cookies, your data will be aggregated with all other user data.

DeclineAccept

Palomar Mountain Needs your Help!

Tell us why you believe Palomar Mountain, with its very unique old-growth forest and the beauty of the Four Seasons, should be preserved for future generations.

Send your testimonial