Earthworks For Waterside Green, Penrith, NSW, Australia

A residential and commercial subdivision, known as Waterside Green Development, in Penrith NSW, is situated in low- lying land affected by high groundwater table and the presence of saline and sodic soils. The subdivision comprises a commercial area, a residential area, internal roads and several lakes and laterals. The Development Control Plan (Penrith City Council, 2004) states that the drainage and stormwater management system across the site should be improved and future dwellings and roads should be constructed on ground higher than the 1 in 100 year flood level, without the necessity to import fill material. Therefore, earthworks for the subdivision comprised excavation of a series of lakes and laterals to improve drainage and stormwater management systems and use the materials gained from the excavations to construct fill platforms in order to raise ground levels above the 1 in 100 year flood level. This paper presents earthworks specifications and procedures for construction of fill platforms and clay liner.