The first railway in colonial South Australia was a line from the port of Goolwa on the River Murray to an ocean harbour at Port Elliot, which first operated in December 1853, before its completion in May 1854. Today the state has 1,600 mm (5 ft 3 in) broad gauge suburban railways in Adelaide, a number of country freight lines, and key 1,435 mm (4 ft 8+1⁄2 in) standard gauge links to other states.