TRTP Undergrounding

Southern California Edison's project to underground the Tehachapi Renewable Transmission began in September of 2013 and is essentially complete. Multiple contractors constructed the project in order to reduce the impact on Chino Hills residents. The TRTP line was energized in the fourth quarter of 2016.

SCE Fourth Quarter 2016 NewsLetter (PDF)

This project is the first of its kind in the United States. SCE and the City of Chino Hills wants to thank Chino Hills residents for their patience as the final milestone of the project was reached. If you have any questions about the project, please contact SCE on the project hotline at 877-795-8787 or visit the SCE website.

Energizing Activities

SCE energized the 500kV line, and there are two transition stations; the Eastern Transition Station (Pipeline Avenue north of Chino Hills Parkway) and Western Transition Station (southwest of western end of Eucalyptus Avenue).

Transition Station Brochure (PDF)

TRTP History

September 2016 - SCE Letter to Adjacent (300 feet) Residents Regarding Energizing

October 2016 - SCE Letter to Residents (700 feet) Regarding Energizing

TRTP History

TRTP Chino Hills Undergrounding Project Area

The project area proposed was within SCE's existing right-of-way corridor from the City's western border near Tonner Canyon, proceeding northeast (south of Eucalyptus Avenue) to Peyton Drive then continuing east to the Chino Valley Freeway (SR-71).

Construction Notice on Chino Hills Underground Construction for TRTP 9 3 13.jpg

SCE Undergrounding Presentation

For a general overview of the undergrounding plans for the Southern California Edison (SCE) Tehachapi Renewable Transmission Project (TRTP), review the SCE update which was presented at the Tuesday, September 23, 2014 City Council meeting: 

Undergrounding Construction Update Video (September 23, 2014)
Undergrounding Construction Update PowerPoint (PDF)