Flood Risk Management County Summary

County: Mayo

Report Produced:

Major Flood Relief Schemes

Historically, flood risk management focused on arterial drainage for the benefit of agricultural improvement. Arising from increasing flood risk, the Arterial Drainage Act, 1945, was amended in 1995 to permit the Office of Public Works (OPW) to implement localised flood relief schemes to provide flood protection for cities, towns and villages.

Some schemes have been carried out by the Local Authorities under their own powers using the Planning and Development legislative code. The OPW either works in association with the relevant Local Authorities or funds Local Authorities directly to undertake flood relief works.

Scheme Properties Protected Current Status
Crossmolina Flood Relief Scheme 116 Stage IV: Implementation/Construction
Ballina Flood Relief Scheme 297 Stage II: Planning Process
*This information has been extracted from the 2018 Flood Risk Management Plans as more up todate information is not currently available.

FRM "Small Projects"

Information on Local Authority led FRMP "Small Projects" (any project costing up to €1M or protecting 10 or more properties)

Scheme Stage/Gateway Properties Protected
Westport (Cois Abhainn & Ashwood) Flood Relief Scheme Completion 36
*This information has been extracted from the 2018 Flood Risk Management Plans as more up to date information is not currently available.

Minor Flood Mitigation Works and Coastal Protection Scheme

The Minor Flood Mitigation Works & Coastal Protection Scheme (the “Minor Works Scheme”) was introduced by the Office of Public Works in 2009. The purpose of the scheme is to provide funding to Local Authorities to undertake minor flood mitigation works or studies to address localised flooding and coastal protection problems within their administrative areas. The scheme generally applies where a solution can be readily identified and achieved in a short time frame.

Under the scheme, applications are considered for projects that are estimated to cost not more than €750,000 in each instance. Funding of up to 90% of the cost is available from the OPW for approved projects. The commencement and progression of any works for which funding is approved is a matter for each Local Authority concerned.

Local Authority Project Location Project Details Approved Funding (€) Year of Approval
Mayo County Council Cloonmore & Carrowntober, Carracastle, Co. Mayo Construction of new earth embankment, approximately 0.8 metres in height extending over a length of 75 metres. Cleaning of 186 linear metres of an existing open drainage ditch (along the west side of the L-1306-0) and the construction of a new road crossing/culvert on the L-13063-0, to allow for discharge of the excess flood waters. Accommodation works will be required, involving reconstruction of an existing cattle pin and improvement of an existing culvert at a field entrance. 14,667 2025
Mayo County Council Glenisland River Removal of debris/vegetation and associated works 21,375 2011
Mayo County Council Carrowholly Upgrading 3 embankments and road raising 126,000 2022
Mayo County Council Foxford Works 31,500 2009
Mayo County Council Seasonmaster Straide 175m long raised embankment at site perimeter Raise road surface above adjacent watercourse 28,575 2016
Mayo County Council Crossmolina Car Park To remove existing railing, construct wall & flood barrier & associated works 95,220 2016
Mayo County Council Carrowholly Addition of embankments to the existing flood defences, associated works 358,787 2019
Mayo County Council Crossmolina Walkway To remove existing shrubbery, construct walls, supply & install flood gate & associated works 64,350 2016
Mayo County Council Barnagreggaun / Mossbrook, Balla Clean drains, install pipe & construct banking alongside road 5,760 2015
Mayo County Council Bunnadober Ballinrobe Deepen & widen the existing open drain for 150m & extend it for 35m south westwards. Extend the roadside embankment along the western side of the channel & associated works 138,079 2017
Mayo County Council Neale-Cross A prefeasibility study, stage 1feasibility study, preferred option identification & surveys 51,850 2022
Mayo County Council Owenwee River Westport Drainage of river, repair weir & provide fencing 52,200 2010
Mayo County Council Crossmolina Chapel Street To reconstruct part of the existing stone wall 12,207 2017
Mayo County Council Crossmolina Chapel Street To repoint/repair existing stone wall 29,700 2016
Mayo County Council Tullinacurra Works – construct drain 20,000 2009
Mayo County Council Tonrehown Construct new wall 10,000 2009
Mayo County Council Devlin North Works - Repair bridge & channel 36,000 2009
Mayo County Council Newport Replace ditch with box culvert /Clean, repair and remove debris from rest of drainage system 180,000 2010
Mayo County Council Derryguillinan Cloghans Install new culvert under road 31,500 2010
Mayo County Council Ballyhankeen Claremorris Deepen existing drains & excavate short length of new open drains & upgrade culverts 56,765 2017
Mayo County Council Copper Beech Straide Raise embankment at site- 35m embankment 5600 high with slopes 1:1 5,490 2016
Mayo County Council Crossmolina Provide two pump sumps to utilise when river levels are elevated and flooding is occurring 8,190 2020
Mayo County Council Cong / Drumsheel Installation of culverts, construct chambers & trash screens & channel improvement works (as outlined in report) 324,819 2017
Mayo County Council Rosturk Mallaranny Clean existing drainage channel adjacent to the road 4,500 2011
Mayo County Council Killateeam Tourmakeady Replacement of culvert 16,200 2012
Mayo County Council Bellavary Works – Renforce earth banks, install piping 37,845 2009
Mayo County Council Dookinelly Acill Island Provide an outlet open drain to the sea & provide roadside drainage 45,000 2010
Mayo County Council Neale-Cross A prefeasibility study, stage 1 feasibility study, preferred option identification & surveys 151,635 2018
Mayo County Council Bohola Village Replacement of existing steam culvert, installation of a field drainage culvert, maintenance / river cleaning & associated works 58,666 2020
Mayo County Council Kilmurray National School Crossmolina Replace existing riverside wall with reinforced concrete wall to specified height, and provide pump sump 20,000 2020
Mayo County Council Frenchbrook Kilmaine Road re-instatement with 100mm diameter pipe, drainage piping & accommodation works 14,850 2014
Mayo County Council Doolough Works to sea wall 45,500 2009
Mayo County Council Ballisnahyny/Glasvally Installation of 450mm & 600mm diameter pipe Deepening of channel including re-instatement & accommodation works 30,600 2014
Mayo County Council Dowagh Ballinrobe Pipeline from flood area to stream or sink hole including reinstating and accommodating works for landowners 60,000 2011
Mayo County Council Creggaunbaun Louisburg Provide embankment around dwelling house & sheds with non-return valves on drainage outlets 28,333 2019
Mayo County Council Shore Rd Bunacurry Achill Clear vegetation downstream of access bridge to house where flooding occurred 5,400 2011
Mayo County Council Downpatrick Head Works 45,500 2009
Mayo County Council Cloondaff Glenhest Vegetation clearance & wall repairs 6,660 2020
Mayo County Council Leenane Owenwee Study & Works (Study only funded) 8,000 2009
Mayo County Council Salmon Leap Cottage Belclare Divert flood waters away from house back into main channel 9,000 2016

Maintenance carried out under Arterial Drainage Act, 1945

The OPW has statutory responsibility for and carries out a programme of Arterial Drainage Maintenance. These maintenance works relate to arterial drainage schemes completed by the OPW under the Arterial Drainage Acts 1945, with the primary purpose to improve the drainage of agricultural lands. Local Authorities are responsible for the maintenance of Drainage Districts, which were completed up to 1943.

The OPW’s annual Arterial Drainage Maintenance Works Programme protects 260,000 hectares (650,000 acres) of agricultural lands and comprises 11,500km (7,150 miles) of river channel and approximately 800km (500 miles) of embankments.

Completed Scheme Scheme Type County(s) Duration of Works Benefitting Area (Acres)
Boyle Major Arterial Drainage Scheme Mayo, Roscommon, Sligo 1982-1992 26,800
Corrib Group Scheme Galway, Mayo, Roscommon None
Corrib-Clare Major Arterial Drainage Scheme Galway, Mayo, Roscommon 1954-1964 74,900
Corrib-Headford Major Arterial Drainage Scheme Galway, Mayo 1967-1973 19,400
Corrib-Mask-Robe Major Arterial Drainage Scheme Galway, Mayo 1979-1986 24,000
Moy Major Arterial Drainage Scheme Mayo, Roscommon, Sligo 1960-1971 61,000

2018 Flood Risk Management Plans Overview

The following table sets out the communities in this county that are covered by the Flood Risk Management Plans launched in May 2018 and provides an indication of the proposed flood relief schemes contained in the Plans for these communities. It should be noted that this table provides the position from May 2018 and the status of some schemes may have changed since then. Any changes will be reflected elsewhere in the county summary. In some instances, a technically viable flood relief scheme has been identified, however, a more detailed assessment of the costs and benefits will be completed to determine if the proposed Scheme is feasible. For other communities, there is a relatively low level of flood risk from rivers and/or the sea, and no structural flood relief measures are therefore proposed at this time. The current level of risk will be reviewed, along with all areas, on a regular basis into the future. In addition to the implementation of proposed flood relief schemes, funding will continue to be available for localised projects under the Minor Works Scheme. The Plans also set out those non-structural measures in place or proposed, for example Flood Forecasting, which benefit all at risk communities and properties. The Interdepartmental Flood Policy Co-ordination Group will continue its work now greatly informed by the wealth of knowledge in the Plans to bring forward further feasible proposals for Government’s consideration to support and assist households and communities through non-structural flood risk management and mitigation measures.

Area Name Existing Scheme in Place Scheme in Construction, Design or Pending New Scheme Proposed in the Plans Potential Scheme subject to further assessment No Scheme Proposed as Community at Low Risk or Scheme Not Viable
Ballina & Environs
Ballyhaunis
Castlebar
Charlestown & Environs (Incl Bellaghy)
Crossmolina
Foxford
Louisburgh
Newport
Swinford
Westport
Westport Quay