230/70kV Estrella Substation Project

In March 2015, the CAISO selected Horizon West Transmission, LLC (Horizon West) as the Approved Project Sponsor to permit, construct, own, operate and maintain the Estrella Substation Project. Located approximately 5 miles east of Paso Robles, California, the project will help ensure safe, reliable power to the local electric system and will:

  • Provide the Paso Robles Substation with more reinforced 70kV sources from Templeton and Estrella
  • Mitigate thermal and voltage concerns which will improve service reliability for electric customers in Paso Robles, San Miguel, Templeton, Creston, Atascadero and Santa Margarita
  • Position the region to meet expected growth in energy demand through investment in new electricity infrastructure
  • Increase the potential to integrate and deliver renewable energy to support California's renewable energy goals meet the CAISO’s project need in a cost-effective manner

In January 2017, Horizon West and Pacific Gas and Electric jointly filed the Proponents Environmental Assessment (PEA) with the California Public Utilities Commission (CPUC).  On July 24, 2017, the CPUC deemed the PEA complete.  The CPUC is the lead agency preparing the Environmental Impact Report.