LADWP Tackles Major Transmission

By Published On: October 9, 2014

Los Angeles Department of Water & Power has contracted for construction of a 61-mile long transmission line to deliver power to the city from renewable energy projects in the Tehachapi Mountains and Mojave Desert. The line is to run from the muni’s Barren Ridge Switching Station in the north to the planned Haskell Canyon Switching Station in the south—where power can be directed through the department’s grid. The muni’s board of commissioners Oct. 7 approved a $184.3 million contract with Barnard Construction to build most of the line. Known as the Barren Ridge Renewable Transmission Project, it will run along an existing transmission line. Work is to be substantially completed in 2016. Department senior power system assistant general manager Randy Howard noted the construction contract is considerably less than the initial $307 million estimate for the line. He said the savings stem from additional work muni staff has performed on preliminary engineering and environmental analysis that have eliminated some risks for the contractor. He also noted the department’s staff is building facilities needed to connect the line at each end. The main components of the transmission project are: • Expanding the existing Barren Ridge Switching Station; • Building the new Haskell Canyon Switching Station; • Constructing a new 230 kV double circuit transmission line connecting these two stations; • Re-conductoring the existing 230-kV transmission line between Barren Ridge and the Rinaldi Receiving Station; and • Adding an additional 230-kV circuit between Castaic Switching Station and Haskell Canyon Switching Station. When completed, the project should allow the muni to tap power from four renewable energy projects being developed around the Barren Ridge Switching Station. In a separate action, the board okayed a budget of $2 million for the muni to purchase renewable energy credits and other environmentally-oriented credits in the coming year.

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