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To support LADWP's goal of providing 100% renewable energy to the LA electrical grid by 2045, Barnard is increasing the power transmission capacity between Haskell Canyon Switching Station and Sylmar Switching Station.

Barnard is demolishing 13 miles of existing double-circuit 115kV transmission line and installing 13 miles of new, double-circuit 230kV transmission line between the substations. After demolishing the 84 existing structures and foundations, Barnard will install 11 new double-circuit lattice foundations and towers, as well as 64 new double-circuit tubular steel pole foundations and structures. Up to six of the existing lattice structures will be modified for reuse. Additionally, the project includes multiple freeway and bridge crossings. As part of this EPC contract model, Barnard partnered with Black & Veatch to complete the final project designs.


Location: Santa Clarita, California

Owner: Los Angeles Department of Water and Power (LADWP)

Engineer: Black & Veatch

Contract type: Engineer, Procure, Construct (EPC)

Status: Currently under construction


  • Grading, foundation, and transmission line engineering

  • Micropile foundation due to limited site access

  • Structure erection via Skycrane helicopter due to limited site access

  • Procurement of lattice steel towers, monopoles, conductor, OPGW, and hardware

  • Demolition of 13 miles of double-circuit 115kV transmission line

  • Demolition of 84 existing lattice structures and foundations

  • Aqueduct bridge crossing

  • Pre- and post-construction LiDAR surveys

13 miles of 115kV transmission line removal

13 miles of new 230kV transmission line

64 tubular steel poles

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