in agricultural applications. watering process. in the area requiring clean fill. The material is suitable for the Some wetlands close to Abbot Point may Risk of environmental Transport of sediments to the HABITAT RESTORATION and construction of artificial wetlands or benefit from restoration (e.g. Caley Valley impacts on existing wetland wetland and dewatering to the DEVELOPMENT bird roost sites. Wetland). For migratory waders, values. Change in natural required standard would be the construction of suitable roosting sites needs habitat types within the Great biggest logistical constraint. to be aligned with the existence of high Barrier Reef World Heritage value feeding sites. No guarantee that site Area. Impacts are depended would be used and have ongoing upon location and could environmental value. Sediments would need generally be managed during to be dewatered first, with little flat spare construction. Environmental land available. benefits would need to be high to outweigh impacts (e.g. provide habitat for threatened species) Material will need to be dewatered Drying ponds required. Most of the land at Areas most suited to Existing, developed, flat land is LANDFILL (capping and blending for prior to transport. High salt content Abbot Point is constrained due to construction of storage and at a premium and unlikely to beneficial use) may present problems at mine or environmental values and existing or dewatering facilities are of be of sufficient size to land fill site. Sediments are proposed uses. Only small sections of flat high environmental values accommodate treatment, uncontaminated and generally have land are available, but these are too small to (e.g. Clare Valley Wetland). dewatering and storage prior a low acid potential, which can be accommodate large volumes of dredged Impacts on terrestrial to transporting away. Loading managed through treatment. material. Available land is quite undulating. ecology. and unloading facilities Flat land tends to have high environmental required for transportation of values (wetlands and dune vegetation). material to landfill site. Existing landfill sites required that need
in agricultural applications. watering process. in the area requiring clean fill. HABITAT RESTORATION and DEVELOPMENT The material is suitable for the construction of artificial wetlands or bird roost sites. Some wetlands close to Abbot Point may benefit from restoration (e.g. Caley Valley Wetland). For migratory waders, construction of suitable roosting sites needs to be aligned with the existence of high value feeding sites. No guarantee that site would be used and have ongoing environmental value. Sediments would need to be dewatered first, with little flat spare land available. Risk of environmental impacts on existing wetland values. Change in natural habitat types within the Great Barrier Reef World Heritage Area. Impacts are depended upon location and could generally be managed during construction. Environmental benefits would need to be high to outweigh impacts (e.g. provide habitat for threatened species) Transport of sediments to the wetland and dewatering to the required standard would be the biggest logistical constraint. LANDFILL (capping and blending for beneficial use) Material will need to be dewatered prior to transport. High salt content may present problems at mine or land fill site. Sediments are uncontaminated and generally have a low acid potential, which can be managed through treatment. Drying ponds required. Most of the land at Abbot Point is constrained due to environmental values and existing or proposed uses. Only small sections of flat land are available, but these are too small to accommodate large volumes of dredged material. Available land is quite undulating. Flat land tends to have high environmental values (wetlands and dune vegetation). Existing landfill sites required that need Areas most suited to construction of storage and dewatering facilities are of high environmental values (e.g. Clare Valley Wetland). Impacts on terrestrial ecology. Existing, developed, flat land is at a premium and unlikely to be of sufficient size to accommodate treatment, dewatering and storage prior to transporting away. Loading and unloading facilities required for transportation of material to landfill site.
gbr-dredge-material-management-appendixa.docx