Provan Gas Works is an industrial gas holding plant in the city of Glasgow, Scotland. The plant is in the Provanmill area of the city, and was built by Glasgow Corporation between 1900 and 1904. It later became part of British Gas, and subsequently Transco and most recently Scotia Gas Networks (a subsidiary of Scottish and Southern Energy) who operate it today.
Originally the plant was a gasworks, manufacturing town gas via the coking of coal. The plant was expanded after 1919. Following nationalisation of the gas supply in 1948, the plant passed to the Scottish Gas Board, and then to British Gas in 1973. In 1972, supplies of inexpensive natural gas from North Sea oilfields became available. The gasworks was downsized significantly in the 1980s in response to changing economic conditions arising as the British gas industry was privatised under Prime Minister Margaret Thatcher. Today the plant is largely unmanned, used solely for gas storage and distribution.
The plant has become significant for its two massive column-guided gasometers and an additional spiral-guided gasometer, which have become an iconic industrial landmark in Glasgow's East End. Among the largest of their kind in the UK, each of the towers can hold 283,000 m3 (9,994,000 cu ft) of gas, and is 85.4 metres (280 ft) in diameter. Their combined storage capacity is 566,000 m3 (19,988,000 cu ft) – each enough to supply a city the size of York for an entire day.