Corby Battery Energy Storage System Project

North Bay Interconnect, LLC and Corby Energy Storage, LLC (applicant), propose to construct, own, and operate the Corby Battery Energy Storage System (BESS) Project (Corby BESS or project). The BESS facility would be constructed on an approximately 40.3-acre parcel in Solano County, California. The project would include a 300-megawatt (MW), 1,200-megawatt-hour (MWh) battery energy storage system (BESS), associated project substation, inverters, and other ancillary facilities, such as fencing, sound barrier, roads, optional groundwater well, water tank, stormwater retention basins, storage containers, and a supervisory control and data acquisition (SCADA) system. The project would connect to the Pacific Gas and Electric Company (PG&E;) Vaca-Dixon Substation, northwest of the project site and across Interstate 80 (I-80), via a 1.1-mile-long 230-kilovolt (kV) generation tie (gen-tie) line, portions of which would be installed overhead and underground. The underground portions of the gen-tie line would run east-west parallel to and crossing Kilkenny Road, either within acquired easements on adjacent parcels or within the City of Vacaville roadway right-of-way. The overhead portions would include two structures on the project site, four structures between Kilkenny Road and I-80 on private land owned by the applicant, and up to four structures north of I-80 on PG&E;’s Vaca-Dixon Substation property, for a total of up to 10 overhead gen-tie structures. To accommodate the interconnection of the project and other future projects, PG&E; is currently performing network upgrades which include grading, construction of concrete pads, and relocating existing structures within the Vaca-Dixon Substation. Specifically for the project, PG&E; would install a new 230-kV double bus bay structure (hereinafter “Corby Bay”) with associated foundations and supports on approximately 0.6 acres p