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TRTP Undergrounding
Current Undergrounding Work Area and Details
Project Hotline Graphic

Construction Activities - September 12, 2014 Update

Southern California Edison (SCE) has resumed work in the TRTP right-of-way. SCE has hired multiple contractors to start the underground construction in multiple locations in order to keep the project on time to meet deadlines to deliver renewable energy. It is anticipated that work will continue through late 2016 / early 2017.

For the Next Two Weeks:  
Residents can expect to see a subcontractor filming or videotaping along the right-of-way (ROW) and at access roads. At times the production company may be zooming in on private driveways to obtain the street house number for location purposes only.

Construction Activities to Expect:
• Clearing of vegetation and any impeding structures within the project area
• Installation of chain-link fencing along the project area to ensure safety of the public and project personnel during construction
• Trenching and underground drilling
• Installation of underground electric transmission wires (500 kV), conduit, vaults and related equipment
• Installation of two (2) transition stations to enable wires to go from overhead towers to underground conduits at each end of the underground area; each station will be approximately three (3) acres in size, with an 8-foot perimeter wall with some equipment approximately 133 feet in height
• Installation of two (2) new lattice steel transmission structures, one adjacent to each transition station described above, to feed the overhead wires into the stations
• Use of large construction equipment, including cranes and drilling equipment
• Periods of temporary lane closures and traffic control on:
Chino Hills Parkway (between Carbon Canyon Road and Eucalyptus Avenue) and;
Pipeline Avenue (between Chino Hills Parkway and Eucalyptus Avenue)

Project Area:
From the western end of Eucalyptus Avenue, proceeding northeast (south of Eucalyptus Avenue to Peyton Drive, then east to the Chino Valley Freeway (SR71) at Pipeline Avenue. 
Tips for Minimizing Construction Impacts 
SCE is committed to minimizing any inconvenience and ensuring the safety of both the public and project personnel during this work. In addition to SCE and contractor efforts to minimize the impacts to residents and businesses during construction, here are some simple tips that may help you reduce construction disturbance:

  • Close windows and doors facing the construction area in order to reduce noise and dust
  • Watch for project information updates to ensure you have the most up-to-date information about construction activities taking place in your area.

Stay Informed:

Encourage your neighbors to sign up to receive updates too! They can send a request to .

SCE Town Hall Was Held on October 9, 2013
Southern California Edison held a Town Hall Meeting back on October 9, 2013 regarding the Chino Hills Undergrounding of the Tehachapi Renewable Transmission Project.

If you missed the Town Hall Meeting or attended and have questions about the project, please call the TRTP project hotline at (877) 795-8787 and leave a message with your specific question and your call will be returned.  
TRTP History 

TRTP Chino Hills Undergrounding Project Area
Construction Area Map