A combined promenade, cycleway and flood defence project.
Summary
Roughan & O’Donovan undertook the feasibility study, preliminary design, and detailed design for this combined promenade, cycleway and flood defence project. We also prepared the Environmental Impact Statement (EIS) and Appropriate Assessment (AA) for the scheme. The EIS was approved by An Bord Pleanála in 2011.
Solution
Promenade and cycleway design
The 6.5m wide combined promenade and cycleway is located on the seaward side of, contiguous and at grade with, the existing James Larkin Road. It links the North Bull Island causeway and the Wooden Bridge at Dollymount.
Flood defence design
- Demountable barriers
- Flood defence gates
- An earth flood bund
- Extensive repairs to the existing sea wall
- 582m of new, reinforced concrete, sea defence wall
Road improvement works
- Upgrade of pedestrian footways
- Introduction of traffic calming measures
- Extended 50km/h speed restriction zone
- Enhanced car parking facilities at St Anne’s Park
- New pedestrian crossings for ease of access to the new promenade
Challenge
The principal design constraint of the scheme was the ecological importance of the South Bull lagoon, one of Ireland’s most protected sites.
Our solution satisfied the requirements of key consultees by:
- minimising the footprint in the lagoon and thereby loss of habitat
- creating more intertidal mudflats than would be lost by the construction of the promenade
Services provided:
- Civil and structural engineering design
- Environmental engineering consultancy
- Flood risk management
- Environmental Impact Assessment
- Appropriate Assessment
- Contract documents
- PSDP
- Archaeological Assessment
- Construction supervision
