STATE OF CALIFORNIA
PUBLIC UTILITIES COMMISSION

Southern California Edison's Transmission Line Rating Remedition (TLRR) Program
Eagle Mountain-Blythe 161kV Subtransmission Line Project

Application No. A.24-07-021

Updated: August 2025


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Welcome to the California Public Utilities Commission (CPUC) website for environmental review of Southern California Edison's (SCE's) Transmission Line Rating Remediation (TLRR) Eagle Mountain-Blythe 161 kV (kilovolt) Project (project). The Project is located entirely within the Chuckwalla Valley in Riverside County, California. The circuit extends approximately 53 miles (approximately 279,840 feet) and encompasses 581 acres from the Eagle Mountain Substation near Desert Center, California to the Blythe Substation in Blythe, California. The Project falls within the Victory Pass, East of Victory Pass, Corn Spring, Sidewinder Well, Aztec Mines, East of Aztec Mines, Hopkins Well, Roosevelt Mine, and Ripley 7.5-minute U.S. Geological Survey (USGS) topographic quadrangles. A map is provided here.

SCE submitted a Permit to Construct (PTC) application for the project to the CPUC on July 31, 2024 (A.24-07-021). The PTC application can be viewed by following the links below under Environmental Review.

The CPUC will be the lead agency for review of the project in compliance with the California Environmental Quality Act (CEQA).

This website provides access to public documents and information relevant to the CEQA environmental review process. An overview of the project is provided below. For additional information on the CPUC proceeding, contact the Public Advisor's Office.

 

Project Information

Please review the following for information about the project:

1. Eagle Mountain Blythe TLRR Project Description

2. Project Map

 

Description of the Proposed Project

SCE is proposing to construct and operate the project. The project would be located in Riverside County, to the west of Blythe. SCE is required to file an application for PTC with an accompanying Proponent’s Environmental Assessment (PEA) with the CPUC for the project. The project would involve a compliance-based effort addressing 300 circuits throughout Southern California Edison’s (SCE) service territory approximately 53 miles from the Eagle Mountain Substation near Desert Center, California, to the Blythe Substation in Blythe, California.

Environmental Review

SCE filed their PTC application and PEA (including appendices) on July 21, 2024. See links for the PTC application, PEA and appendices below.

PEA Deficiency Letters, CPUC Data Requests, and Application Responses

CPUC Request Description Date of Approval
Deficiency Letter #1 (November 4, 2024) Response #1 (February 14, 2025)  
Deficiency Letter #2 (April 16, 2025) Response #2 (May 25, 2025)  

 

For Additional Information

If you have comments, compliants, or questions regarding the project, please contact us using the CPUC's Eage Mountain-Blythe TLRR Project email.

The CPUC's Project Manager is:
Eric Chiang, CPUC Project Manager
Project e-mail: EMB@ecorpconsulting.com
California Public Utilities Commission
505 Van Ness Avenue
San Francisco, CA 94102

 

   

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