where it was re-processed to obtain minerals. In 1982 Carnon Consolidated (RTZ) purchased Billiton's freehold interest in the Mount Wellington, Wheal Maid and Hydraulic Tin sites. By 1984 100% of South Crofty had been purchased by Carnon Consolidated, a subsidiary of Rio Tinto Zinc, and the three mines of Crofty, Mount Wellington and Wheal Jane operated as one unit. Production at Wheal Jane had already restarted in 1980 reaching 1499 tonnes of tin in 1981 and 1863 tonnes in 1984. The Wheal Maid Decline was started, on land originally owned by Mount Wellington Mine. 1984 operations produced an estimated 35,000 tons of ore. The length of the Decline is 655 meters, and reached over towards Cornwall County Council's waste dump at United Downs. The Decline suffered from ingress of Methane gas from the dump, which gave rise to safety concerns over possible underground fires or explosion. In March 1991 Wheal Jane, incorporating Mount Wellington Mine, the Wheal Maid Decline and the Wheal Maid Tailings Lagoons, were finally closed for the last time. On 16 January 1992 the UK's most infamous mine water outburst disaster occurred when 320 million litres of untreated acidic mine water and sludge burst from the Nangiles adit at the Wheal Jane Mine site in Cornwall into the Carnon River. This resulted in a major pollution plume that discoloured the estuary and deposited high concentrations of Cd and Zn. Cadmium levels reached 600 mg 1-1, relative to UK water quality standards of 1 mg 1-1 In 1998 Mount Wellington Mine was bought by David Shrigley of DRS Demolition from South Crofty PLC. DRS submitted multiple planning applications for change of use for the Mount Wellington Mine site, however all were rejected. 2000s-Present Carrick District Council gave planning consent for retention of the Mount Wellington Mine buildings in 2003. By 15 April 2004, Carrick District Council was reviewing the future of Mount Wellington Mine at Twelveheads, Bissoe. Councillors discussed what could be done with the former mine so future possible developers could have a clear idea of its potential. In his report to the committee, Carrick's head of development, Karl Roberts, said the site was clearly unsuitable for a residential development. The committee's comments and the report's findings were to be looked at by Carrick's full cabinet. Mount Wellington Mine had not operated for more than 10 years, and at one point, looked set to be turned into