BP Kent refinery closed in 1982 after which some of the site was taken over by British Gas for a liquefied natural gas facility. In 1957 the South Eastern Gas Board (SEGAS) constructed a catalytic reformer plant adjacent to the BP Refinery to use light distillates (naphtha) from the refinery to reform into town gas. The SEGAS process was a low pressure cyclic catalytic process which used a catalyst based on lime or magnesia to promote the reaction between hydrocarbons and steam to produce town gas. The plant was made redundant when the British gas industry converted from town gas to natural gas during the period 1967–77. The 2,000 MW Kingsnorth power station (TQ810721) opened in 1967 and burnt coal or oil, according to the economics of each. As with others in this area, the site has proved challenging. During building the reclaimed marshland was found to have poor load-bearing properties. Kingsnorth's ground level was some four feet below the highest tide even then, and tide levels are expected to rise another three feet in coming years. For the planners, these disadvantages were outweighed by the proximity to London, the availability of cooling water from the River Medway, and deep-water berthing for oil tankers and colliers. Between 1971 and 1981 the Burmah-Total oil company planned to build an oil refinery on Cliffe marshes (TQ720786). However, the oil crises of 1973-4 and 1979-81 made the project uneconomic and the plans were abandoned. Grain oil-fired power station was constructed on a 100 ha site (TQ886755) for the CEGB. It was commissioned in 1979 and had a projected output capacity of 3,300 MW. The power station was closed in 2015 and was subsequently demolished. Medway Power Station (TQ8707467 is a 735 megawatts gas-fired power station on the Isle of Grain in Medway next to the River Medway, it was commissioned in 1995. Damhead Creek (TQ809728) is a 792 MWe gas-fired Combined Cycle Gas Turbine (CCGT) power station, commissioned in 2001. Grain LNG Terminal (TQ862759) is a facility for the import, storage and export of liquefied natural gas (LNG). It was developed from 2002 and is now a major facility for the British gas supply industry. Grain CCGT power station is a 1,275 MW plant consisting of three natural gas-fired Combined Cycle Gas Turbine units, it was commissioned in May 2010, and cost £580 million. The power station is able to transfer up to