Mesa Substation Project

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Southern California Edison (SCE) is proposing the Mesa Substation Project to ensure that the electric grid will continue to serve the needs of its customers in the region. Upgrading the existing Mesa Substation and connecting existing transmission lines to the substation will address future reliability concerns related to the projected retirement of older coastal power plants and the previous retirement of the San Onofre Nuclear Generating Station (SONGS), without requiring new transmission lines or substations.