Geotechnical Investigation & Construction Monitoring of Reclamation Project Harrington Waters Estate, Harrington, Australia

This paper describes some of the geotechnical and construction aspects involved with a large-scale reclamation project at Harrington, which is situated over a deep alluvial profile containing soft / loose compressible soils. The combined residential and golf course development comprised dredging of one million cubic metres of sand from the adjacent Manning River to raise site levels, and facilitate ground improvement by means of preload to limit post construction settlements. Construction monitoring of the preload, together with the hydraulically placed fill which contained a high proportion of pyritic silt, was successfully undertaken to meet both the geotechnical and environmental objectives of the project.