Dredging of Tweed River to Resume Shortly
Operators of the Tweed Sand Bypassing (TSB) system will soon commence dredging of the Tweed River entrance. Weather permitting, dredging should start between the 17th and 21st of August, and will take approximately four to eight weeks.
In total, 150,000 cubic metres of sand will be dredged from the Tweed River entrance and delivered offshore of Bilinga, Snapper Rocks, Duranbah, and Fingal.
However, sand is not being placed at Kirra, in fact there is an exclusion zone around Kirra Reef (and also at Cook Island) to prevent any sand deposition affecting the reef environment. TSB claim the reef is regularly monitored to ensure that dredging does not create any adverse effects.
The Tweed River entrance gets dredged each year, usually in late winter as this presents the most favourable weather for dredging. If the swell is too large the dredge can't operate and the vessel needs to shelter and wait for conditions to improve.
Dredging of the entrance is done in conjunction with automatic sand bypass from Letitia Spit. If there were no dredging, the bar would gradually build up making the entrance difficult to navigate. Owing to the bypass system, the process of shoaling happens much more slowly, yet it still occurs.