Waiau township has been subject to many flood events from both the Mason and Waiau Uwha Rivers. Numerous ad-hoc stopbanks have been constructed over the past century, the earliest dating between 1907 and 1922 by the Waiau Riverside Protection Board.
This project will improve the level of flood protection to Waiau through the remediation and strengthening of two existing stopbanks on Inland Road, and through the construction of a new stopbank which will border the eastern side of the town. It is expected that these works would protect Waiau from flooding in a 200-year ARI flood event.
