CCA1 Merrion to Dún Laoghaire
CCA1 is the section of coast that stretches from Merrion to Dún Laoghaire Harbour. This frontage is mainly urban with the trainline corridor running along the coastline.
The Emerging Preferred Scheme to be taken forward to Public Consultation 1 consists of; Raised walls across the majority of the frontage and raised walkways and new walls at the amenity areas of Seapoint and Blackrock.
The main advantages identified with the Emerging Preferred Scheme are:
- Delivers the project objectives;
- Low maintenance burden over its lifetime;
- Reduced direct impacts on archaeology, architectural and cultural heritage in comparison to other options;
- Reduced environmental impact on important intertidal and reef habitats; and
- Retains the amenity function and shoreline character at Blackrock and Seapoint.
Wall raising
- The raising and rebuilding of existing vertical walls is unavoidable to provide protection of the railway. The walls are currently experiencing wave overtopping during storm events, and this is without considering future sea level rise.
- The existing walls are largely masonry walls from the original railway construction and of good quality. Many of these existing walls have the capacity to be raised.
- At this early stage in the design process, it has been assumed the wall will be raised with reinforced concrete by a height of approximately 1m to 1.5m. At locations where the existing wall is in poor condition the walls will be taken to ground level and rebuilt with reinforced concrete.
Walkways and steps raising
- At Blackrock and Seapoint, there is existing provision for public access for general amenity, bathing and water sports. The Emerging Preferred Scheme seeks to provide similar amenity provision.
- The existing footpaths, walkways and steps (over and along the revetment) will be rebuilt and raised where needed.
- New and raised seawalls will be incorporated at the back of the sea defences to manage the wave overtopping risk. The level transitions and beach access will be remodelled to retain all amenity areas and access along the shore and to the beach. This remodelling will take into consideration the proposed use of the steps, accessibility requirements and health and safety requirements.
- The area around the Martello Tower to the west of Seapoint will remain unchanged and the new works will tie into these areas to maintain amenity areas and access.
- The swimming piers and the beach will remain unchanged.
Useful Material and Downloads
- CCA 1 Brochure
- Emerging Preferred Scheme CCA1 Plan
- Cross Section Wall Raising at Blackrock
- Cross Section Wall Raising at Seapoint Beach
- Emerging Preferred Scheme CCA1 Preliminary Options Selection Report
Appendices
To make a submission please visit the How to Engage section.