PGE Corporation through its subsidiary Pacific Gas and Electric Company engages in the sale and delivery of electricity and natural gas to customers in northern and central California the United States It generates electricity using nuclear hydroelectric fossil fuelfired fuel cell and photovoltaic sources As of December 31 2021 the company owns and operates approximately 18000 circuit miles of interconnected transmission lines 33 electric transmission substations approximately 108000 circuit miles of distribution lines 67 transmission switching substations and 753 distribution substations and natural gas transmission storage and distribution system consisting of approximately 43800 miles of distribution pipelines approximately 6200 miles of backbone and local transmission pipelines and various storage facilities It serves residential commercial industrial and agricultural customers as well as natural gasfired electric generation facilities The company was incorporated in 1905 and is headquartered in San Francisco California