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Services

Coastal Engineering

RPS has over 30 years experience of providing specialist Coastal Engineering services to public and private sector clients.

RPS has a team of over 50 marine and coastal experts based in 10 offices across the UK and Ireland, as well as marine teams based in Australia, the US and Canada. This makes RPS well placed to take on any project. The team has extensive experience of holistic assessments for projects in seas, coasts and estuaries, providing developers with advice on all phases of a project lifecycle.

We have over 30 years experience of providing support for coastal engineering projects, including coast and flood protection, marine outfalls, dredging and land reclamation, due protection, beach nourishment, breakwaters, seawalls and revetments. We undertake management of large-scale multi-disciplinary projects and we provide survey and consultancy support for planning applications, consent issues under the environmental permitting regulation (EPR) and marine construction consents through environmental impact assessments where required.

Our comprehensive range of services includes strategic studies, scheme design, real time forecasting, sea level rise impact assessment, environmental impact assessment and hydraulic modelling in the following fields:

Coastal Protection and Flood Defence

Dredging and Reclamation

Water Quality & Eutrophication

Coastal Process

Harbour Disturbance Modelling

Thermal Plume Modelling

Computational, Environmental and Physical Modelling

Case Studies

Dredging of Sligo Harbour Entrance Channel

Dredging of Sligo Harbour Entrance Channel

Sligo County Council

RPS was commissioned by Sligo County Council to prepare a feasibility study and subsequently undertake an Environmental Impact Assessment (EIA) to gain the necessary consents for dredging the entrance channel to Sligo Harbour.

A feasibility study was undertaken to determine a scope for dredging the entrance channel to Sligo Harbour to an optimum depth within a constrained budget. Detailed hydrodynamic modelling was undertaken to ascertain the influence and extent of the dredging plume within Sligo Harbour. It was eventually determined that the optimum depth for the navigation channel was to dredge to -3.0m C.D. which would allow the passage of vessels up to 4,000 DWT to the quay during high water.

The proposed dredging would generate 250,000m³ of dredge spoil and RPS undertook a feasibility study to examine the alternatives for disposing of the dredge spoil in detail. The spoil was considered to be unsuitable for reuse in engineering projects or reclamation and consequently it was proposed that the material be disposed at an offshore dump site. An Environmental Impact Study was completed for submission with a Foreshore Licence and Dumping at Sea Licence application in May 2011.

Irish Coastal Protection Strategy

Irish Coastal Protection Strategy

Office of Public Works

RPS and DHI were appointed to provide a strategic review of coastal protection requirements and policy in Ireland on behalf of the Office of Public Works (OPW).

Responsibilities included: review of coastal protection requirements in Ireland; classification of the nature of the Irish coastline; identification of assets at risk on a National basis; developing appropriate policies and procedures for the implementation of future coastal protection in Ireland; establishing an effective basis for decision making with specific regard to resource allocation; development of a pilot strategy for the South East Coast; development of a coastal GIS database and the preparation of tender documentation and supervision of a National Coastal Survey.

Irish Storm Surge Forecasting Service

Irish Storm Surge Forecasting Service

Office of Public Works

RPS was commissioned by the Office of Public Works (OPW) to undertake a real-time storm-surge forecasting service for the Republic of Ireland.

RPS utilises our previously developed MIKE 21 storm surge model to generate storm surge forecasts from October to April for various locations around the Irish coast. RPS have automated the process whereby Met data pertaining to wind and atmospheric pressure is downloaded daily from the Met Eireann FTP site and used to inform the storm surge forecasting model. The model is run daily from October to April and once post processing is completed the forecast data is uploaded to a designated secure website which is only accessed by OPW and other restricted organisations. The OPW then make a decision based on the predicted tidal levels on whether to issue a flood warning.

Loch Ryan Port Hydraulic Modelling

Loch Ryan Port Hydraulic Modelling

RPS was appointed by Stenaline to undertake a Hydraulic Modelling Study/EIA that would inform the design of the new £50m port at Loch Ryan.

The new port development included the dredging, reclamation, new jetty and port working area. In addition to engineering design, RPS undertook the assessment of the physical processes, morphology and dredging issues relating to the EIA for this project. In relation to these aspects of the project RPS coastal engineering team undertook the following:

Hydraulic modelling of waves, tides, sediment transport and dredging plumes.

Assessment of impacts of the development on the coastal processes of Loch Ryan.

Siltation and maintenance dredging assessment including optimisation of the harbour

Layout to reduce ongoing maintenance dredging requirements.

Assessment of the impacts of capital dredging and land reclamation particularly in regards to the adjacent shellfish beds.

Consultation with stakeholders.

Discussions and agreements with SEPA and SNH regarding the monitoring requirements for suspended sediment concentrations during dredging operations.

Advised on navigational issues including discussions with ships masters and other navigational interests.

Production of data for Harbour Order, discharge consents and potential public inquiry.


Strandhill, WWTW Coastal Defences

Strandhill, WwTW Coastal Defences

Sligo County Council

RPS was appointed to undertake the design, project management and construction supervision of coastal works to protect the extended WwTW at Strandhill.

The beach extends from the rocky Killaspug Point at its northern end to Portcurry Point at the entrance to inner Ballysodare Bay. The beach is backed by an extensive system of sand dunes which hold the designation of Special Area of Conservation. The proposed coastal works had to provide protection for the waste water treatment works for both the present day and future water levels and wave climate.

The fixed grey dunes in the area between the fenced sewage treatment works and the sea, in addition to being a priority habitat for the SAC, was also found to be of the highest quality optimum habitat for the Annex I feature SAC species Vertigo angustior. Therefore, the protection works had to be carefully designed and implemented, and the construction methodology subjected to a full Appropriate Assessment to ensure that no adverse impacts were encountered to the surrounding SAC habitats and species.