In 2018, the Office of Public Works, (OPW), completed the National Catchment Flood Risk Assessment and Management (CFRAM) Programme - the largest ever flood risk study in Ireland to date. This study involved an engineering assessment for 300 communities identified as areas of potentially significant flood risk, produced a range of flood maps for potential future as well as present-day conditions, and resulted in 29 Flood Risk Management Plans (FRMPs) which are published on the OPW flood portal, www.floodinfo.ie.
The 29 FRMPs set out both structural and non-structural measures to manage the flood risk in the communities at potentially significant flood risk and elsewhere around the country. The FRMPs identified some 150 new and additional flood relief schemes to protect 95% of the properties at risk within those communities. The residual risk is being addressed by the Minor Flood Mitigation Works and Coastal Protection Scheme, enhanced preparedness and flood forecasting.
The Government has committed €1.3 billion to the delivery of flood relief schemes over the lifetime of the National Development Plan to protect some 23,000 properties in communities that are under threat from river and coastal flood risk. Since 2018, as part of a phased approach to scheme delivery, this funding has allowed the OPW, in partnership with local authorities throughout the country, to treble the number of schemes at design, planning or construction to some 100 schemes at this time.
Nationally, 56 schemes have been completed to date which are providing protection to some 13,580 properties and an economic benefit to the State in damages and losses avoided estimated to be in the region of €2 billion. Consequently, work to protect 80% of all at-risk properties nationally is completed or underway.
As it is not feasible to deliver all flood relief schemes concurrently, due to constraints on the specialised engineering skills, the flood-relief delivery programme was sub-divided into two tranches, focusing initially on Tranche I schemes and those already in the delivery pipeline. The prioritisation of the first tranche of schemes was based on three criteria including: scale of projects, capacity to deliver a national programme, and maximising return on investment by reference to property numbers. Under the national programme, work has yet to commence on the design of some 50 Tranche II flood relief schemes.
There are five stages to delivering a flood relief scheme from feasibility through design, planning, and construction as follows:
• Stage 1 – Scheme Development and Preliminary Design
• Stage 2 – Planning Process or Public Exhibition & Confirmation
• Stage 3 – Detailed Design
• Stage 4 – Construction
• Stage 5 – Handover of Works
The OPW is also piloting a new delivery model for flood relief schemes through four Tranche II schemes in counties Kilkenny and Donegal, which is referred to as the Tranche II Pilot. There are two Tranche II Pilot Schemes in County Kilkenny (Freshford and Piltown) and two schemes in County Donegal (Donegal Town and Letterkenny).
The Tranche II Pilot will transfer the management of data gathering, as a first step in designing a scheme, from consultant engineers for a single scheme to the local authorities for all schemes in the Pilot and, where feasible, within their areas of responsibility. The Pilot means that data gathering may be scaled up from individual communities to all schemes in a county. The Pilot will better inform the prioritisation of future schemes nationally and the scope of services required from consultants to design and construct flood relief schemes.
Throughout County Galway five schemes are completed and four schemes are currently progressing through Stage I: Scheme Development and Preliminary Design and there is one Tranche II scheme. Two of the schemes currently underway are being led by Galway County Council with two staff funded by the OPW for the Council to project manage their delivery. One scheme in County Galway, Ballinasloe Flood Relief Scheme, is an OPW led scheme which is being progressed through the Arterial Drainage Acts 1945 and 1995, as amended. The other scheme is the Galway City Flood Relief Scheme that is led by Galway City Council and the OPW fund one staff member in Galway City Council to project manage delivery of the scheme.
Once all schemes are completed, these will provide protection to over 1,600 properties. Tabulated lists are given below of Completed Schemes (Table 1), ongoing Active Schemes with the current programme for their substantial completion (Table 2) and proposed Tranche II Schemes (Table 3). Details of which are also publicly available on www.floodinfo.ie/scheme-info/.
Table 1: Completed Flood Relief Schemes
|
Completed Schemes
|
Completion Date
|
Properties Protected
|
|
Clare River (Claregalway) Flood Relief Scheme
|
2019
|
77
|
|
Dunkellin & Aggard Stream Flood Relief Scheme
|
2019
|
23
|
|
Gort River (Bridge Street) Drainage Scheme
|
1997
|
21
|
|
Lacken/Ardrahan Flood Relief Scheme
|
1997
|
5
|
|
Maam Valley
|
2001
|
2
|
Table 2: Ongoing / Active Flood Relief Schemes
|
Active Schemes
|
Status
|
Substantial Completion
|
Properties to be protected
|
|
Ballinasloe Flood Relief Scheme
|
Stage I: Scheme Development and Preliminary Design
|
2029
|
309
|
|
Galway City (Coirib go Cósta), Flood Relief Scheme
|
Stage I: Scheme Development and Preliminary Design
|
2033
|
1079
|
|
South Galway (Gort Lowlands) Flood Relief Scheme
|
Stage I: Scheme Development and Preliminary Design
|
TBC
|
115
|
|
Clifden Flood Relief Scheme (Small Project)
|
Stage I: Scheme Development and Preliminary Design
|
TBC
|
24
|
Table 3: Proposed Tranche II Schemes
|
Proposed / Future Schemes
|
Properties to be protected
|
|
Portumna Flood Relief Scheme
|
22
|