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The next featured finalist in the 2023 WA Earth Awards is the Onslow Boating Precinct Stage 1A delivered by Ertech for client the Department of Transport, Western Australia.
This multi-stage upgrade to the boating facility and supporting infrastructure included the dredging of 45,000 cu. m of material to facilitate the construction of a rock wall revetment; two new boat ramps; and a floating pontoon holding jetty.
Also included were a new stormwater drainage line, gross pollutant traps, sealed carpark and driveway, solar-powered street lighting, and associated road furniture.
Ertech’s alternative construction methodology involved a temporary earth bund, complete with dewatering systems, to protect the work area from the influence of tides.
This allowed work to be performed up to 8m below high tide level, with 70% of the dredging and rock revetment works able to be completed in dry conditions. The entire boat ramp construction was performed in the dry, hugely improving safety and efficiency.