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The Drainage Operations Section is based at Deansrath Depot, Clondalkin.

This Section is responsible for the South Dublin County Council Drainage System which comprises approximately 1,200 km of foul and surface water public sewers. 

The drainage system in most modern housing estates, comprise two separate systems - a foul drainage system and a surface water system. The foul drainage system is designed to collect wastewater not only from toilets but also from wash-hand basins, sinks, washing machines and dishwashers. All this effluent is transported via piped systems to the wastewater treatment plant at Ringsend.

On the other hand, the surface water system is designed to channel stormwater (rainwater) to the nearest suitable river. Rivers and streams are natural surface water channels.

The drainage system in some older estates have a single system, 'combined sewerage system', where foul drainage and surface water enter the same pipes and everything is transported through the trunk piped system to the wastewater treatment plant at Ringsend.

The Council is also an active participant in the Greater Dublin Strategic Drainage Study (GDSDS). The GDSDS was set up in 2001 to analyse the existing drainage system in the Greater Dublin Area and to make recommendations on future drainage practices. Dublin City Council (DCC) is the Contracting Authority acting on behalf of Fingal, South Dublin, Dun Laoghaire Rathdown, Meath, Kildare and Wicklow County Councils. The GDSDS recommendations (Insert link) were presented in 2005 and have been adopted by South Dublin County Council.

See the Eastern River Basin District Website

Contact Us:
Drainage Maintenance Depot
Deansrath House
St Cuthbert's Road
Nangor Road
Dublin 22
Ph (01) 4138500
Fax (01) 4574878

Drainage Section
County Hall
Dublin 24
Ph (01) 4149000
Fax (01) 4149024

A selection of FAQ's relating to drainage are in related documents below.


Statutory Consultation on Draft Flood Maps

Consultation dates - from Friday 20th November, 2015 to Wednesday 23rd December, 2015 inclusive

The Office of Public Works (OPW) has developed draft flood maps under the national CFRAM (Catchment Flood Risk Assessment and Management) Programme and, with its partners, through other projects to provide a general overview of the flood risk in the future across Ireland from rivers and extreme sea levels. The OPW and Dublin City Council have also developed draft flood maps for pluvial flooding for certain areas. The main purposes of these draft maps are to increase awareness among the general public, local authorities and other organisations, of the likelihood of flooding and to inform flood risk management plans being prepared by the Government to prevent and reduce the risk and impact from future flooding.

The draft flood maps for public consultation have also been produced in accordance with the requirements of the European Communities (Assessment and Management of Flood Risks) Regulations 2010, S.I. No 122 of 2010, as amended by the European Communities (Assessment and Management of Flood Risks) (Amendment) Regulations 2015, S.I. No 495 of 2015, that transposed the EU Floods Directive 2007 into Irish law, and of the Government's 2004 Flood Risk Management Policy.

Purpose of this Consultation

The OPW is now inviting members of the public to make submissions or comments on these draft flood maps using their local knowledge of these areas, to help finalise the maps. The OPW and its engineering consultants have recently held Public Consultation Days in many of the Areas for Further Assessment (AFAs) and if you have already attended one of these events and commented on the draft flood maps, there is no need to make a further submission, unless you have more comments to make.

Draft Flood Maps are available to view in South Dublin County Council offices from Friday 20th November, 2015 to Wednesday 23rd December, 2015, both dates inclusive, during normal opening hours. An Information Booklet is available with the draft flood maps.

Observations or comments on the draft flood maps may be sent to the Commissioners of Public Works to arrive no later than 5pm on Wednesday 23rd December, 2015. Questionnaires for completion are available in the local authority offices, or online at https://maps.opw.ie/flood_draftmap_consult/ The questionnaire contains the OPW address for observations or comments.

Objections to the draft flood hazard maps must be made in writing by post on the Form to Lodge Objections to the Draft Flood Hazard Maps to arrive no later than 5pm on Monday 21st December 2015 to: Draft Flood Maps Objections, Engineering Services, OPW HQ, Jonathan Swift S., Trim, Co. Meath.

Persons intending to make an objection should read the Procedures for Processing Objections to the Draft Flood Maps. These procedures and the Form are available on the consultation website https://maps.opw.ie/flood_draftmap_consult/ or at local authority offices where the draft maps are on display.

Further information:

Please email draftmaps@opw.ie

Or call 046 9426468