The south bank of the Humber Estuary in England is a relatively unpopulated area containing large scale industrial development built from the 1950s onward, including national scale petroleum and chemical plants as well as gigawatt scale gas fired power stations. From the 1950s onwards a number of chemical plants were built between Immingham and Grimsby, and two major oil refineries built south of Immingham Dock in the 1960s. Growth and development of the oil and chemical industries took place through the 20th century with some contraction of chemical works occurring in the late 20th century.