during works as part of the de constraint. retention pond) watering process. Terrestrial land lost to non-beneficial land fill use, therefore, deeming it unavailable in the future for other purposes. Rosslyn Bay Boat Harbour LAND Sediments would be suitable for use Highly constrained as lands immediately Extending the existing Only available area is RECLAMATION as reclamation fill, although the surrounding the harbour have a diversity of reclamation area would result extension of existing (sub-tidal creation structural properties of sediments uses, from National Park, farm land, park in impacts upon a narrow reclamation area. This would of land) would need further investigation if land and residential. The only viable location fringe of mangroves, direct impact local residents and not the land was to be developed. potentially suitable for reclamation would be disturbance to soft bottom possible due to future Capital dredging sediments were an extension of the existing reclaimed habitats. Waste water proposed uses of park area used in construction of the harbour. parkland, by extending it to the north and discharges during (developments). Sediments from ongoing west. Topography of areas surrounding the construction would increase maintenance dredging are of a finer harbour are undulating and not suitable for turbidity, which may have grain size, due to settlement of reclamation. impacts on coral reef suspended sediments from the communities at the nearby water column. Sediments generally Bluff Rock and Wreck Point. uncontaminated with a small amount potential requiring treatment for ASS. CONSTRUCTION Sediments derived from capital Highly constrained as lands immediately While the reuse of dredge No existing dewatering, drying dredging projects are likely to have surrounding the harbour have a diversity of spoil for construction or storage areas for treatment
retention pond) during works as part of the de watering process. Terrestrial land lost to non-beneficial land fill use, therefore, deeming it unavailable in the future for other purposes. constraint. Rosslyn Bay Boat Harbour LAND RECLAMATION (sub-tidal creation of land) Sediments would be suitable for use as reclamation fill, although the structural properties of sediments would need further investigation if the land was to be developed. Capital dredging sediments were used in construction of the harbour. Sediments from ongoing maintenance dredging are of a finer grain size, due to settlement of suspended sediments from the water column. Sediments generally uncontaminated with a small amount potential requiring treatment for ASS. Highly constrained as lands immediately surrounding the harbour have a diversity of uses, from National Park, farm land, park land and residential. The only viable location potentially suitable for reclamation would be an extension of the existing reclaimed parkland, by extending it to the north and west. Topography of areas surrounding the harbour are undulating and not suitable for reclamation. Extending the existing reclamation area would result in impacts upon a narrow fringe of mangroves, direct disturbance to soft bottom habitats. Waste water discharges during construction would increase turbidity, which may have impacts on coral reef communities at the nearby Bluff Rock and Wreck Point. Only available area is extension of existing reclamation area. This would impact local residents and not possible due to future proposed uses of park area (developments). CONSTRUCTION Sediments derived from capital dredging projects are likely to have Highly constrained as lands immediately surrounding the harbour have a diversity of While the reuse of dredge spoil for construction No existing dewatering, drying or storage areas for treatment
gbr-dredge-material-management-appendixa.docx