National Grid plc transmits and distributes electricity and gas to residential, commercial, and industrial customers. The company operates high voltage electricity transmission and gas transmission networks in Great Britain; a gas distribution system in the United Kingdom; regulated gas and electricity distribution, and high voltage electricity transmission networks in New York and New England; electricity generation facilities in New York and Massachusetts; and liquefied natural gas (LNG) storage facilities in the United Kingdom. It also owns an electricity interconnector in France and the Netherlands; and a 224 kilometer (km) transmission interconnector between New England and Canada. It operates an electricity transmission system comprising approximately 7,200 kilometers of overhead line, 1,400 kms of underground cable, and 325 substations; gas transmission system that consists of approximately 7,660 kms of high pressure pipe and 23 compressor stations connecting to 8 distribution networks and third party independent systems; and gas distribution system consisting of approximately 131,000 kms of gas distribution pipeline transporting gas to approximately 10.9 million consumers in the United Kingdom. The company also operates an electricity distribution network of approximately 116,250 circuit kms in New England and upstate New York; and a network of approximately 56,630 kms of gas pipeline distributing gas to approximately 3.5 million customers in northeastern United States. In addition, it owns 50 oil and gas fired electricity generation units on Long Island with a generation capacity of 3.8 GW; and 4.6 MW unit of solar generation in Massachusetts. Further, the company engages in property management, gas and electricity metering, unregulated transmission pipelines, LNG import terminal, and other LNG operations, as well as offers installation and maintenance services to energy suppliers. The company was founded in 1990 and is based in London, the United Kingdom.