The Patawalonga Lake System (PLS) receives between 4,000m3 and 8,000m3 of sediment every year in its catchment basins, from the Sturt River and Brown Hill Creek. Sediment accumulation has been a significant issue at the PLS since it was commissioned in 2001. If sediment in the PLS is not properly managed, it poses a threat to Patawalonga Lake water quality and aesthetic quality also contributing to the sediment load at Gulf St Vincent.
Maritime Constructions was contracted to remove the build-up of sediment material from the PLS Basin A and Diversion basin, dewater, treat and dispose of it in a beneficial manner. Maritime Constructions also provided the DEWNR with a long term option for the management of the PLS.
This project involved the use of a cutter suction dredge “Calamity” to remove over 3260 dry tonnes from the Patawalonga Lakes System (PLS). Sediment removed was piped to an approved dewatering system consisting of geotextile bags/tubes that separated water from the dredge slurry. Upon completion of the dewatering process, the sediment is loaded into trucks for transport offsite to Integrated Waste Services (IWS) Northern Balefill site for remediation and reintroduction into the environment as treated fill.
Department of Environment, Water and Natural Resources
© Maritime Constructions 2015
Another self-managed site by Caston Design