SDG&E plans new transmission line running to San Diego County border ...Middle East

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SDG&E plans new transmission line running to San Diego County border
A SDG&E transmission line under construction in 2018. (File photo courtesy of SDG&E)

San Diego Gas & Electric has announced plans to build, own and operate a new 500-kV transmission line connected to San Diego County.

The line is set to run between the existing Imperial Valley Substation and the border of San Diego and Orange counties, but construction isn’t expected to start until the end of the decade.

    According to the California Independent System Operator, this new project is essential for the state to achieve its ambitious carbon reduction goals while modernizing and increasing the resilience of the electrical grid.

    SDG&E officials, in a Friday news release, describe the resources available to the area as “currently constrained.”

    The project, they added, will help reduce costs from congestion, while expanding access to resources in the Imperial Valley and the Southwest.

    “We must continue to strengthen our energy grid to meet the growing demand for electricity in the Southern California region and to advance the state’s clean energy goals – all whilekeeping affordability front and center,” said SDG&E President Scott Crider. “We willwork closely with customers and communities through a robust stakeholderengagement process to ensure this critical line gets built responsibly.”

    SDG&E will begin what it called “an extensive community engagement process” in which thepublic will have multiple opportunities to submit feedback on ways “to ensure the projectis built responsibly.” The company, however, offered no further details on the process.

    This transmission line was included in CAISO’s 2022-2023 Transmission Plan, which identified the need for a total of 45 such projects throughout the state.

    Costs to build and upgrade high-voltage transmission lines (200kV or higher) thatprovide statewide benefits are proportionately distributed among all Californiacustomers within CAISO’s Balancing Authority Area and governed by the FederalRegulatory Energy Commission.

    That distribition helps to limit the cost impact on SDG&E customers to approximately 9%, based on current data, the utility said.

    The company also will integrate its wildfire safety program into the project. The initiative hashelped prevent a catastrophic utility-caused wildfire for nearly 18 years, officials said.

    Construction on the transmission line is expected to begin in 2029, and is estimated to be in service by 2032, subject to securing state and federal approvals and permits.

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