1.Lake Illawarra Entrance Options Study
Environmental & Disaster Management
PlanningA two-stage study by Wollongong City Council and Shellharbour City Council, conducted by the UNSW Water Research Laboratory, to assess long-term management options for the Lake Illawarra entrance channel. Since the lake was permanently opened in 2007, erosion along the Windang foreshore, increased tidal range, seagrass and saltmarsh impacts, and undermining of jetties and boat ramps have become significant issues. More than 50 options were assessed and narrowed to a shortlist of five. In May 2025, both councils resolved to call on the NSW Government to resource and undertake a Strategic Business Case for a long-term solution, focusing on Option 4 (low rock barriers into the channel, estimated $145-240 million) and Option 5 (return to intermittent opening, estimated $35-70 million).
Source 1 for Lake Illawarra Entrance Options Study (opens in new tab)Source 2 for Lake Illawarra Entrance Options Study (opens in new tab)