Projects - TRED
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TRED is in early stage development of two high-capacity transmission systems designed to serve the Los Angeles area. The projects advance California’s commitment to a zero-carbon electric system by 2045 and aggressive commitments by the City of Los Angeles to:

    • A zero-emissions transportation network including more electric car chargers and zero-carbon new buildings, and
    • Zero-carbon electricity with 80% clean energy by 2036 and 100% renewable energy by 2045.

Widespread electrification, particularly in transportation, will increase electricity use in Los Angeles by about 50%. Our power grid projects provide much-needed additional transmission capacity and promote the resilience needed to achieve state and city goals.

TRED’s projects provide a stronger connection to the LA Basin and bypass existing congestion on the power grid, allowing more clean power to flow where and when it is needed.




Connected to existing strong transmission lines at the Diablo Canyon substation, TRED’s projects use high-capacity circuits on the seabed to traverse almost the entire route to coastal substations in the Los Angeles metropolitan area. Short cable segments on land are installed underground. Submarine and buried land cables will not trigger wildfires. In addition, the additional capacity provided by TRED’s projects gives utilities important operating flexibility to temporarily shut down land-based lines to reduce wildfire danger.
Power without Pollution

Power without Pollution

TRED’s projects use advanced HVDC transmission technology. They can reliably deliver power to the LA Basin where old, polluting natural-gas-fired generation is located.
Today, many of these plants are needed for reliability. Our projects will allow many of the old fossil-fueled generators to close and allow long-burdened communities to breath easier.

Cost and Timing

Cost and Timing

At about $2 billion each, these transmission projects are significant investments. But they are a good value for ratepayers. The transmission projects save money for ratepayers by reducing:

  • The cost of maintaining old gas plants for reliability purposes
  • The cost of significant transmission upgrades in Los Angeles that will otherwise be required when in-basin power plants are retired

The projects could be in service in 2027-2029, given timely regulatory approvals.