Abstract
The Magenta Shores development fronts 2.3 km of Tuggerah Beach on a formerly sand mined and landfill site in an urban growth area on the central coast of New South Wales. To increase the natural defences against storm waves and mass sand movements, the incipient foredune was retained and the parallel beach ridge landform was re-established by mimicking natural processes. Analysis of waste and resources led to a coordinated large-scale onsite re-use, recycling and waste management program that reduced landfill, transportation and natural resource requirements. Bitou bush removed from the Coastal Protection Zone was incorporated into golf course soils to improve grass growth. Leachate in the groundwater from the former landfill was diverted away from Tuggerah Lake and re-used in golf course irrigation. Upgrade of the local sewer treatment plant and installation of a public dual pipeline servicing Magenta and the adjoining township satisfied irrigation demands and provided non-potable water for the existing and expanding urban community. The sustainability challenges of the project were met through clear identification of existing environmental risks, application of scientific research, integrated team management and stakeholders’ cooperation.
Highlights
This paper describes how an Australian construction company sustainably redeveloped a coastal environmentally degraded sand-mined and former landfill site
Sand Volume In June 2007, there was an east coast low with wind speeds up to 135 km/hr [24] and a monthly rainfall of 574.6 mm [24]. This major storm event resulted in beach erosion along the coast, including the formation of a 10 m deep sand cliff adjoining homes fronting Tuggerah Beach at North Entrance
The sustainability challenges of the project were met through clear identification of existing environmental risks, application of scientific research, integrated team management and stakeholders’ cooperation
Summary
This paper describes how an Australian construction company sustainably redeveloped a coastal environmentally degraded sand-mined and former landfill site. Restoration of the natural dune was fundamental to protection of the built assets, remnant significant vegetation and sensitive estuarine ecosystems, and the sustainability of the project. The 100 ha Magenta Shores development is situated east of Wyrrabalong National Park and the estuarine Tuggerah Lakes complex; north of the township of The Entrance and natural opening of Tuggerah Lakes; west of a 40 ha strip of Coastal Protection Zone adjoining Tuggerah Beach; and south of the National Park and Norah Head (Figure 1). In the National Park and on the site, there is remnant littoral rainforest supporting Syzygium paniculatum (magenta lilly pilly) and banksia woodland/eucalypt forest providing habitat for Squirrel. Australian National and State legislation and the squirrel glider is listed as a vulnerable fauna species under State legislation
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