Docket Number
Project Status
Facility Closure
Project Type
Application for Certification
Project Description

The Solar Energy Generating System (SEGS) VIII project is located at 43880 Harper Lake Road, 7 miles northeast of Highway 58 on a 500-acre site. Additional SEGS projects were planned in the immediate vicinity, but were cancelled for various reasons, one important one being the lack of transmission capacity from the area.

SEGS VIII is an 80-megawatt (MW) field of parabolic mirrors supplemented by natural gas to produce electricity. Heat from the mirrors is concentrated on tubes of heat transfer fluid (HTF) which is circulated to steam boilers to produce electricity. During the peak season, the project generates 80 MW of electricity to the Southern California Edison transmission grid. Mirror washing takes place Monday through Friday from 8:00 pm to 5:30 am.

On June 29, 2011, the California Energy Commission (CEC) approved a Post-Certification Amendment for additional loops of mirrors to be added within the SEGS VIII plant boundary.

On July 8, 2020, the CEC approved a PCA (TN 233901) approving the construction of a battery energy storage system (BESS), with a maximum capacity of up to 80 MW, between the SEGS VIII and IX facilities.

On May 4, 2020, the CEC approved a Final Decommissioning (TN 234364) for the SEGS VIII facility.

Power Plant Certification and Exemption Processes

As required by the Warren-Alquist Act, the Energy Commission monitors Commission-certified energy projects throughout construction, operation, and closure to ensure compliance with the conditions of certification imposed by the Commission’s Final Decision for approving the projects.

Original Proceeding

e-Commenting has been closed. Please submit your comments in compliance proceeding above.

Docket Log (88-AFC-01)

Exhibit List

Proof of Service List

Search All Power Plant Documents


Project Manager

John Heiser
(916) 628-5566

Public Participation Questions

Public Advisor

Media Enquiries

Media & Public Communications Office

Subscribe SEGS VIII - Harper Lake List Serve

Automated Email Notifications
Please enter your first name.
Please enter your last name