This project consisted of constructing and upgrading 6 bio retention basins for Gold Coast City Council. The scope of works included testing and confirming hydraulic permeability of existing basins, supply and installation of clay capping layers as required, underdrainage installation and upgrades, acid sulphate management, concrete structure construction, specialist sand layers and extensive landscaping. The 6 basins included Burleigh Heads, Pimpama, Ormeau, Reedy Creek and 2 in Coomera. The works require significant temporary drainage and erosion and sediment control planning to limit impacts on existing waterways.