CCA6.1 Greystones to Newcastle
CCA6.1 is the section of coast that stretches from south Greystones to Newcastle. At this frontage the trainline runs along a natural embankment at the back of the beach. Coastal protection measures currently in place comprise long sections of rock revetment.
The Emerging Preferred Scheme to be taken forward to public consultation is a combination of rock revetments and wave walls
The top advantages identified with the Emerging Preferred Scheme are:
- Non-complex and comparatively low-cost construction; and
- Minimal maintenance burden and expenditure.
Rock revetment
- A rock revetment will be constructed for some of the unprotected frontage to prevent erosion and stabilise the shoreline alignment. These structures will also reduce wave overtopping onto the railway line.
- The rock revetment will comprise a minimum of two layers of natural rock boulders overlaying a rock underlayer. The rock size has been selected to provide stability in the long term and to accommodate climate change. The geometry of the rock revetments limits wave overtopping.
Beach Access Steps
- Concrete beach access steps will be built through the new rock revetments to provide safe access to and from the beach.
Concrete Revetment
- In the location around The Breaches, a concrete revetment is proposed rather than a rock revetment. The concrete revetement will comprise a concrete slope with a sheet pile at the toe and rock toe protection.
Wave Walls
- Some of the rock revetments require a wave wall immediately behind them to provide an impermeable barrier at the back of the permeable rock revetments. It has been assumed at this stage of the design that the wave wall will predominantly be precast reinforced concrete. The alignment and size of the walls will be determined during the next stage of design.
Useful Material and Downloads
- CCA6.1 Brochure
- Emerging Preferred Scheme CCA6.1 Plan
- Cross Section Concrete Revetment at the Breaches
- Cross Section Extension of Rock Revetments
- Emerging Preferred Scheme CCA6.1 Preliminary Options Selection Report
Appendices
To make a submission please visit the How to Engage section.