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TRTP Undergrounding
TRTP Hotline Website and Email Card

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.

SCE Undergrounding Update 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 by clicking on the links below: 

Undergrounding Construction Update Video (September 23, 2014) 

Undergrounding Construction Update PowerPoint

Southern California Edison TRTP 3rd Quarter Newsletter

Construction Update:

Tuesday, December 16th - Special Update
SCE contractors will deliver splice vaults on Tuesday, December 16 at Garden Court east of Lobelia Dr. A splice vault consists of eight sections of concrete block which are each about 10 ft. tall and 10 ft. wide. Each individual section will be transported separately on a 40-foot flatbed truck.

December 15 - December 21, 2014
Construction activities as part of Southern California Edison’s (SCE’s) Tehachapi Renewable Transmission Project (TRTP) will include the following: 

  • Surveying throughout the project route
  • Clearing of vegetation and grubbing between Western Hills Country Club and Avenida Cabrillo
  • Installation of chain-link fencing along the edge of the utility right-of-way along Garden Court, west of Cork Drive through east of Lobelia Drive    
  • Grading work at the Western Transition Station (WTS), west of Canon Lane  at the terminus of Eucalyptus Avenue   
  • Trenching work on Avenida Cabrillo, Calle Madrid, Maplewood Drive, and Foxwood Drive - there will be street lane closures at these locations
  • Demolition work at the Eastern Transition Station (ETS), between Pipeline Avenue and the 71 Fwy
  • Vault excavation/installation work at Garden Court (west of Cork Drive and east of Lobelia Drive)
  • Horizontal directional drilling - west of Pipeline Avenue (south of Yellowstone Circle, and Garden Court (east of Lobelia Drive); equipment mobilization at HDD site east of Lost Trails Drive (includes installation of a sound wall) 

Eastern Transition Station 
Demolition work at the eastern transition station, located between Pipeline Avenue and the Chino Valley Fwy (71) has begun.  There will be periods of night work at this location in order to reduce construction noise impacts to the Montessori School of Chino Hills.

*Please Note: Schedule is tentative and may change depending on weather and other factors.

A water truck will be on the utility right-of-way to help control fugitive dust. If at any time you have concerns, please call SCE at (877) 795-8787. While dust is a part of construction and cannot be completely eliminated, SCE implements measures to minimize impact and to ensure compliance with dust level requirements. A water truck will be used in the utility right-of-way to minimize such dust. 

Horizontal Directional Drilling
Horizontal Directional Drilling (HDD) is a method of installing underground utilities when trenching work is impractical to perform.  The 500 kV underground project in Chino Hills will require two HDD sites along the route.  Southern California has developed an informational brochure that provides additional information.  HDD construction activity is anticipated to begin in November of 2014 and continue through the end of 2015.

Construction hours are:
Chino Hills locations: 7:00 a.m. - 7:00 p.m., Monday – Friday; 8:00 a.m. – 6:00 p.m., Saturday
Chino locations: 7:00 a.m. – 8:00 p.m., Monday – Saturday  
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 and Encourage your neighbors to sign up to receive updates, too! 

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