2. Background
SCE is an investor-owned public utility operating an interconnected and integrated electric utility system that generates, transmits, and distributes electric energy in portions of Central and Southern California.2 In addition to its California properties, SCE separately or jointly owns facilities in Nevada, Arizona, and New Mexico that produce power and energy for use in California.
The Proposed Project will provide additional transmission capacity serving the Cities of Chino, Ontario and unincorporated western Riverside County to ensure customer electrical demand is met safely and reliably. In conjunction with the filing of Application (A.) 06-12-032 (Application), SCE filed its Proponent's Environmental Assessment (PEA).
The electrical needs of the Cities of Chino, Ontario and unincorporated western Riverside County (the Electrical Needs Area) are currently served from SCE's main electrical grid via a portion of SCE's Chino and Mira Loma 220 kV systems, which are comprised of 220/66 kV transformers, 66 kV subtransmission lines, 66/12 kV transformers, and 12 kV distribution lines. The Chino 66/12 kV, Soquel 66/12 kV, Archibald 66/12 kV, and Mira Loma 66/12 kV Substations currently provide electrical service to approximately 37,000 metered customers and are the source substations for the new large residential, commercial, and light industrial developments within the Electrical Needs Area (ENA) with some distributions lines ranging in length from five to seven miles. The existing Chino-Corona-Pedley 66 kV subtransmission line will be the source line for the new Kimball Substation, and will be looped into the proposed substation. The existing lines to be modified are located in either SCE-owned rights-of-way or public street rights-of-way, and modifications include replacement of the existing wood poles with 160 light weight steel (LWS) poles and replacement of the conductor.
2 SCE's service territory is located in 15 counties in Central and Southern California, consisting of Fresno, Imperial, Inyo, Kern, Kings, Los Angeles, Madera, Mono, Orange, Riverside, San Bernardino, Santa Barbara, Tulare, Tuolumne and Ventura Counties, and includes approximately 179 incorporated communities and outlying rural territories. SCE also supplies electricity to certain customers for resale under tariffs filed with the Federal Energy Regulatory Commission.
