Boat Harbour Development Case Study
Shell Cove Boat Harbour Development, NSW
Greg Britton1
Director, Haskoning Australia (a company of Royal HaskoningDHV), Sydney, Australia
1
Abstract
Shell Cove is a large scale, masterplanned, beachside, urban development originally approved in the 1990s located on the New South Wales South Coast in the Shellharbour City region (Figure 1).
The Boat Harbour element of the project is proposed to be developed in three stages and includes an Inner
Harbour, Outer Harbour, Entrance Channel linking the Boat Harbour to the sea across Shellharbour South
Beach, a Breakwater and a Groyne. Substantial excavation/dredging is required to create the Boat Harbour, much of which is within an area of actual and potential acid sulfate soils.
A …show more content…
This wet method of removal and transport of ASS was proposed in order to reduce the risk of oxidation of the ASS.
Two main geotechnical issues were identified with the ASS management strategy proposed in the
EIS based on field and laboratory investigations undertaken by Coffey Geosciences on behalf of
Patterson Britton:
the lengthy time necessary to achieve adequate consolidation of the hydraulically placed ASS material in the burial pits under the future land platform and hence the time delay before commencement on the development of public and private infrastructure, estimated to be from 4 to 70 years; the shallower rock levels determined over the site compared to those adopted in the EIS, which substantially restricted the opportunity for reburial of ASS below the Boat Harbour and significantly increased the required lateral extent of burial pits under the future land platform thereby exacerbating the consolidation issue above.
Rotation of the Boat Harbour by approximately 15o in an anti-clockwise (westerly) direction …show more content…
Aboriginal middens are shown hatched and shaded.
Figure 4 View of the 3D physical model testing of the entrance configuration conducted in the wave basin at UNSW
Water Research Laboratory
slight modification to the head of the Northern
Groyne, thus providing greater wave protection to the Access Channel and to the boating facilities located upstream.
Construction of the Stage 1 section of the
Breakwater and Northern Groyne, which are located across the sandy beach above high water mark, is now underway. These works are being constructed within a temporary steel sheet pile cofferdam which incorporates temporary rock and sand ground anchors.
Deletion of Boat Harbour Flushing Pipe
System
The EIS proposed a flushing pipe system for the
Boat Harbour on the basis that, adopting conservative assumptions, a pump may
Greg Britton1
Director, Haskoning Australia (a company of Royal HaskoningDHV), Sydney, Australia
1
Abstract
Shell Cove is a large scale, masterplanned, beachside, urban development originally approved in the 1990s located on the New South Wales South Coast in the Shellharbour City region (Figure 1).
The Boat Harbour element of the project is proposed to be developed in three stages and includes an Inner
Harbour, Outer Harbour, Entrance Channel linking the Boat Harbour to the sea across Shellharbour South
Beach, a Breakwater and a Groyne. Substantial excavation/dredging is required to create the Boat Harbour, much of which is within an area of actual and potential acid sulfate soils.
A …show more content…
This wet method of removal and transport of ASS was proposed in order to reduce the risk of oxidation of the ASS.
Two main geotechnical issues were identified with the ASS management strategy proposed in the
EIS based on field and laboratory investigations undertaken by Coffey Geosciences on behalf of
Patterson Britton:
the lengthy time necessary to achieve adequate consolidation of the hydraulically placed ASS material in the burial pits under the future land platform and hence the time delay before commencement on the development of public and private infrastructure, estimated to be from 4 to 70 years; the shallower rock levels determined over the site compared to those adopted in the EIS, which substantially restricted the opportunity for reburial of ASS below the Boat Harbour and significantly increased the required lateral extent of burial pits under the future land platform thereby exacerbating the consolidation issue above.
Rotation of the Boat Harbour by approximately 15o in an anti-clockwise (westerly) direction …show more content…
Aboriginal middens are shown hatched and shaded.
Figure 4 View of the 3D physical model testing of the entrance configuration conducted in the wave basin at UNSW
Water Research Laboratory
slight modification to the head of the Northern
Groyne, thus providing greater wave protection to the Access Channel and to the boating facilities located upstream.
Construction of the Stage 1 section of the
Breakwater and Northern Groyne, which are located across the sandy beach above high water mark, is now underway. These works are being constructed within a temporary steel sheet pile cofferdam which incorporates temporary rock and sand ground anchors.
Deletion of Boat Harbour Flushing Pipe
System
The EIS proposed a flushing pipe system for the
Boat Harbour on the basis that, adopting conservative assumptions, a pump may