PUNCH Consulting Engineers was appointed by IRES REIT to carry out a Stage 3 Site Specific Flood Risk Assessment (SSFRA) study for this residential development in Sandyford, Co. Dublin, in full compliance with the requirements of “The Planning System & Flood Management Guidelines” published by the Department of Environment in November 2009. This flood risk assessment involved detailed 1D-2D flood modelling of the Carysfort Maretimo River which is predominantly culverted through the area.

CFRAMS mapping for the area demonstrated that the site currently stores floodwaters during 1 in 1000 year events. At the request of Dún Laoghaire-Rathdown County Council, flood modelling was undertaken to assess the nature of the displacement of these waters as a result of the proposed development. This was carried out using detailed survey, as well as a detailed hydrological and hydraulic assessment of the catchment. The hydraulic modelling used the TUFLOW and Flood Modeller software packages.

The SSFRA was prepared to the satisfaction of Dún Laoghaire-Rathdown County Council and An Bord Pleanála.