Fact sheet Spring 2017

Western Harbour Tunnel Initial corridor options assessment

Selecting the concept design The Western Harbour Tunnel has been identified as a priority transport infrastructure project for . Initial corridor options assessment Future Transport, released by the Four corridors were evaluated • Potential impacts on NSW Government in October (see map) to identify the most Goat Island 2017 includes Western Harbour acceptable corridor. Tunnel and Beaches Link. • Potential impacts to Key factors were: Harbour’s main Previously, the 2012 NSW Long shipping channel Term Transport Master Plan and • Likely geology, geotechnical stability and suitability for the 2014 State Infrastructure Orange option Strategy Update referenced tunnel construction the need for a new crossing • Tunnel depths, geometry and Similar to the red option, of Sydney Harbour. ability to achieve acceptable it connected with the near Artarmon and In 2015, Roads and Maritime road gradients not the Services started assessment work • Connectivity with the broader at North Sydney. on this new harbour crossing. road network Disadvantages included: The concept of a new • Contructability • The need for a relatively across western Sydney Harbour • Minimise property disturbance was discontinued early because long tunnel • Minimise environmental impacts of the high visual, tourist and • Poor road connection heritage values of the Sydney compared with other options Harbour Bridge. Red option A tunnel under western Sydney Tunnels between Balmain, Goat Brown option Island and McMahons Point. Harbour provides similar Crossing of Sydney Harbour connectivity, capacity and Disadvantages include: further west – broadly design outcomes as a new bridge. • Steep gradients with adverse under and the It also avoids the impacts of a outcomes for traffic flow and Gladesville Bridge. bridge including environmental, tunnel air quality This option was discounted property and visual • North Sydney connections during initial assessment amenity issues. required long, circular access as it did not provide viable ramps with adverse impacts network connectivity. on traffic performance Selected option – Blue corridor The blue option was selected as the concept design option to be tested further, due to: • Good connectivity to North Sydney, Beaches Link and the Gore Hill Freeway • Flatter tunnel gradients • Avoids the Sydney Harbour National Park • Constructability • Minimising property impacts of the project • Reduces interface with Sydney Metro tunnels

Fullers Middle Dehli Road Bridge Chatswood Cove Benefits: • Cut travel times

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Indicative map of options assessed Key Blue option corridor Road network Brown option corridor Park Orange option corridor Water YouRed optioncan corridor have your say at any time Surface To findTunnel out more about the project, or to have your say: www.rms.nsw.gov.au/whtbl 1800 931 189 This document contains important information [email protected] about transport projects in your area. If you need an interpreter, please call the Translating and Interpreting Customer feedback Service on 131 450 and ask them to call the Project Team on 1800 931 189. The interpreter will then help Roads and Maritime Services you with translation. Locked Bag 928, North Sydney NSW 2059

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