TRC East Grand Substation (2021)

Caltrain’s existing South San Francisco Station is being replaced with a new center boarding platform and pedestrian underpass. Pacific Gas & Electric Company’s TRC East Grand Substation project includes an underground 115kV transmission line to support the new station. Underground Electric Construction Company is providing layout, excavation, and restoration services, and installing duct banks, riser foundations, and concrete vaults.

In progress are two electrical circuits starting from the East Grand Substation and ending just before the Caltrain Station where it transitions to overhead UECCo began mechanical excavation for the two circuits in March 2021, set to be completed by the end of 2021.