Flood protection is on the agenda
By EMMA CORNFORD
THE Clarence Valley's lack of protection against a 1-in-100-year flood will be on the agenda for the Clarence Valley Council engineering committee meeting today.
A report, prepared by Ian Dinham from council's floodplain services, indicated that both the Grafton and South Grafton levees would not protect the area in a 1-in-100-year flood, and identified areas at risk.
Flood levels were calculated using a computer-imaging technique.
According to the study, such a flood would overtop the levee at Pine Street first, then at the end of Fry Street and the sailing club.
The first major overtopping would be at the end of Villiers Street and then at Maud Street and over the railway lines north of Grafton. Filling inside the Grafton levee would continue from numerous locations.
In South Grafton, the first flooding would occur at the end of McLennans Lane and Freemans Road which would fill the floodplain basin to the north of the Gwidyr Highway. Major overflowing at Hay Street would then occur, then minor flooding at Bank Street, James Street and Butters Lane.
According to the report, Grafton and South Grafton have only a 20- to 50-year flood immunity.