Sydney Harbour Tunnel
Constructed to alleviate congestion on Sydney Harbour Bridge, the Sydney Harbour Tunnel was Australia's first underwater tunnel. This four-lane road totaling 2,280 meters in length crosses Port Jackson in Sydney via an immersed tube structure consisting of eight connected reinforced concrete units. The tunnel was constructed by Kumagai Gumi Co., Ltd. in partnership wtih a local company. After completion of the project, New Real Property Corporation expanded its business operate and maintain the tunnel under a long-term contract.
An underwater tunnel providing a second vehicular crossing of Sydney Harbour as an alternative to the Sydney Harbour Bridge
Immersed tube section: 960m
Land tunnel section: 1,320m
Contract Period: 35 years