The new “Irish Salt Mining Corporation” Headquarters at Kilroot, Carickfergus are progressing well. This 10,000 sq. ft. building overlooks Belfast Lough and will house the above-ground operations of the company. 400 metres below ground, and extending inland through a maze of tunnels, are the company’s salt mines – the only salt mining operation on the island of Ireland. Approximately 500,000 tonnes of rock salt (for de-icing roads) are produced each year from the mines, 1/5th of which is used annually to grit our roads.