Question: when did they finish building the sydney harbour bridge
Answer: of tracks Track gauge 1,435 mm ( 4 ft 8 ⁄ in ) standard gauge Electrified 1500 V DC overhead History Constructed by Dorman Long & Co Construction start 28 July 1923 ( 1923 - 07 - 28 ) Construction end 19 January 1932 ( 1932 - 01 - 19 ) Inaugurated 19 March 1932 ( 1932 - 03 - 19 ) Opened 19 March 1932 ( 1932 - 03 - 19 ) Statistics Toll Time of day tolling ( southbound only ) Sydney Harbour Bridge Location in Sydney