tags: #publish links: [[Sydney]], [[Engineering]] created: 2021-10-16 Sat --- # Sydney Northside Storage Tunnel https://www.sydneywater.com.au/sw/water-the-environment/how-we-manage-sydney-s-water/wastewater-network/northside-storage-tunnel/index.htm https://www.tunneltalk.com/TunnelTalk-Australia-May2000-Sydney-Northside-Storage-Tunnel-alliance-holding-up-under-pressure.php A 20km+ network of large 3-6m tunnels, 40-100m under Sydney northern suburbs and harbour. It provides overflow storage (500,000m3) for wastewater and stormwater overflow, and transports it to North Head sewerage works, avoiding heavy rains from filling Sydney Harbour with sewage. (As much.) Quite the engineering project, completed in the early 2000s, 4 tunnel boring machines.