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TRTP Undergrounding
TRTP Hotline Website and Email Card

Southern California Edison (SCE) is working in the TRTP right-of-way. SCE has hired multiple contractors to complete 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.

Vault Deliveries
SCE contractors will deliver vaults to the following locations: on Tuesday, April 21st south of Hawk Road (east of Little Bend Road); and on Thursday, April 23rd south of Eucalyptus Avenue (west of Cannon Lane).  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.

April 20 - 26, 2015
Construction activities as part of Southern California Edison’s (SCE’s) Tehachapi Renewable Transmission Project (TRTP) will include the following:            

  • Surveying, dust control, and vegetation net inspection throughout the project route
  • Grading work south of Eucalyptus Avenue (east and west of Western Hills Country Club); west of Canon Lane (south of Eucalyptus Avenue); and at the Western Transition Station (west of Canon Lane at the Terminus of Eucalyptus Ave).  
  • Mainline trenching and increased truck traffic on adjacent streets on Cork Drive, Calle Madrid, and north of Paseo Del Palacio and south of Paseo Tortuga (east of Calle Madrid and west of Avenida Marguerite).
  • Trenching at street crossings on Pipeline Avenue, Calle Madrid, Avenida Cabrillo, Lobelia Drive, Foxwood Drive, Maplewood Drive, Morningfield Drive, and Little Bend - there will be street lane closures at these locations.
  • Vault excavation/installation south of Hawk Road and east of Little Bend Road; south of Hiddenspring Circle and west of Sleepyglen Circle; south of Eucalytpus Avenue and west of Avenida Cabrillo, souoth of Eucalyptus Avenue and west of Canon Lane, and east of Calle Madrid and south of Paseo Tortuga.
  • Horizontal directional drilling - south of Garden Court (west of Cork Drive); and south of Prairieview Circle (west of Lost Trail Drive).          

*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. 

Eastern Transition Station
Demolition work at the Eastern Transition Station, located between Pipeline Avenue and the Chino Valley Freeway (SR71) 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.

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

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 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:
Southern California Edison Construction Traffic Impacts Update (February 2015)