Council is working to clear their name, as Thirroul residents clean up following last week’s torrential rain, which left several local streets under water.
Homes around Lachlan Street were inundated in the storm, which saw 200 mm of rain fall on the Thirroul area. That’s classified a ‘one-in-five-year event’.
That story is HERE.
Council says three creeks come together to exacerbate the problem in the area on the southern side of town, including Hewitt’s Creek. These creeks have a catchment of about 150 hectares so when it rains heavily a lot of water makes its way to the ocean.
But it looks like it’s up to local residents to work together to alleviate future risks.
A spokesman says Council’s hands are tied because the majority of the creek that flows behind Lachlan Street runs through people’s backyards, and they have no power to undertake work on private property.
Council recently carried out flood mitigation work at the Lachlan Street culvert, designed to increase the ‘hydraulic capacity’ of the culvert under Lachlan street, but before the water gets that far, they say there’s not much they can do.
Council has carried out the Hewitt’s Creek Flood Study in 2002, and conducted another study last year, which is still being reviewed which classifies properties in the High and Medium Flood Risk zone. (see attached pic).
Council’s flood study can be viewed HERE