LADWP Completes Construction of the Largest Underground Transmission Line in the City of Los Angeles

The 60,000 foot Scattergood-Olympic Cable A is the Longest Underground Transmission Line in LADWP’s Power System

LOS ANGELES (September 26 , 2018) – The Los Angeles Department of Water and Power (LADWP)  has completed the Scattergood-Olympic Cable A Transmission Project, a critical piece of the Department’s plan to replace aging power infrastructure. The Scattergood-Olympic Cable A Transmission Line is the longest underground transmission line in the Department’s power system, measuring 11.4-miles. The cable is more than 6-inches in diameter and weighs 35 pounds per foot. The $130 million transmission line starts in West Los Angeles to the north to past Westchester to the south, and serves communities along that corridor as well as those as far north as the Pacific Palisades. It also connects to the larger high-transmission grid throughout the city, ensuring reliable electric service for millions of Angelenos.

“The Scattergood-Olympic Transmission Line increases our ability to provide safe and reliable power 24/7/365,” said Reiko Kerr, LADWP Senior Assistant General Manager of the Power System.“This project and other transmission line upgrades are critical parts of transforming LA’s power supply and rebuilding our aging power grid infrastructure so that we can effectively deliver increasing amounts of renewable power to our valued customers.”

The new transmission line is an addition to the original line which began commercial service in 1974 and had been experiencing reliability issues. The original line will be used a backup, should it be needed. With the completion of Scattergood-Olympic Cable A, power system reliability for western Los Angeles has been enhanced with improved system flexibility.

The new line also allows for more efficient utilization of power generation resources, including LADWP’s Scattergood Generation Station. The project started in 2008 and the line stretches from Scattergood Generating Station near LAX to the Olympic Receiving Station in West LA.

The Scattergood-Olympic Cable A line operates at 230 kilovolts (kV) and can transfer 656 megavolt amperes (MVA). The cable is connected through underground vaults that are located less than half a mile apart, which reduced the cost of installation and will improve reliability.

Completing the project required close coordination with multiple agencies, including Caltrans, the Federal Aviation Administration, Coastal Commission, Los Angeles Department of Transportation, Los Angeles Bureau of Engineering, Los Angeles Council District 11, five neighborhood councils, and the City of Culver City.