Can the Northside Storage Tunnel help us save stormwater: Has the Berejiklian Govt ignored the Tunnel's water catchment capabilities

by Ganesh Sahathevan




Source: Tunnel Talk ,November 2002



The Northside Storage Tunnel improves water quality in Sydney Harbour by storing wastewater and stormwater that would have otherwise overflowed into the harbour during heavy rain.

The wastewater system is built with overflow points that act as 'relief valves' when pipes reach their capacity. The largest of these overflow points are at:
  • Lane Cove River West
  • Scotts Creek

The tunnel has apparently been built  to allow stormwater to be pumped back from the Manly outlet to a catchment. 
Much has been said about the "climate emergency", but the Berejiklian Government has been silent about how existing infrastructure may be used to conserve water.

END 



















Diagram of Northside Storage Tunnel route from Lane Cove to North Head
The tunnel stretches 16 km from Lane Cove to North Head.

Key facts

  • The tunnel's diameter ranges from 3.8 m to 6.6 m.
  • The tunnel starts 40m below sea level west of Lane Cove River and runs 16 km east to end 100 m below sea level at North Head. 
  • Tunks Park
  • Quakers Hat Bay.




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