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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:

Vault Deliveries Wednesday January 28th and Friday, January 30th
SCE contractors will deliver vaults on Wednesday, January 28th north of Paseo Del Palacio (west of Calle Madrid); and on Friday, January 30th south of Garden Court, (west of Cork Drive).  A 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.  Parking will be restricted to ensure safety during the deliveries.

January 26 - February 1, 2015
Construction activities as part of Southern California Edison’s (SCE’s) Tehachapi Renewable Transmission Project (TRTP) will include the following:        

  • Grading work east of Calle Madrid (south of Paseo Tortuga), west of Chino Hills Pkwy (north of Avenida Marguerite), south of Hawk Road (east of Little Bend Road), south of Hidden Spring Circle (west of Sleepyglen Circle), Eastern Transition Station (Pipeline Ave), and Western Transition Station (west of Canon Lane at the Terminus of Eucalyptus Ave)  
  • Fence installation throughout the project route
  • Surveying throughout the project route    
  • Trenching work on Foxwood Road, Calle Madrid, and Chino Hills Parkway - there will be street lane closures at these locations 
  • Vault excavation/installation south of Garden Court (east of Lobelia Drive);  south of Garden Court (west of Cork Drive);north of Paseo Del Palacio (west of Calle Madrid and west of Avenida Marguerite; South of Prairieview Circle (west of Lost Trail Drive); west of Pipeline Avenue (south of Yellowstone Circle)
  • Horizontal directional drilling - south of Garden Court (west of Cork Drive); south of Garden Court (east of Lobelia Drive); west of Pipeline Avenue (south of Yellowstone Circle); south of Prairieview Circle (west of Lost Trail Drive) 
  • Excavating to verify location and depth of existing utilities (potholing) - Chino Hills Parkway and Pipeline Avenue

Eastern Transition Station (ETS)
Demolition work at the ETS, located between Pipeline Avenue and the Chino Valley Freeway (SR71) at the former City Yard is underway.  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