Location: , Co. Unique ID: 240364 (from PFRA database) Initial OPW Designation APSR AFRR IRR Co-ordinates Easting: 146500 Northing: 146750 River / Catchment / Sub-catchment River Maigue Type of Flooding / Flood Risk Fluvial non-tidal Fluvial tidal Coastal (identify all that apply)

Stage 1: Desktop Review

1.1 Flood History River Flow Path (include review of The River Maigue borders the east and north of the town. A small unnamed Floodmaps.ie) tributary (watercourse A) of the Maigue flows through the centre of town, merging with the Maigue north of the town at the rear of the Manor Court Estate (next to WWTP). The river is tidal up to around the weir at the existing N21 road bridge in Adare. Flood Event Records Seven flood records are listed in floodmaps.ie mainly associated with tidal embankment breaches near Islandea (d/s of Adare) and in the vicinity of the railway bridge.

1.2 Relevant PFRA database comments (in italics): information on flooding issues from OPW comments OPW and LA staff Designated APSR on the basis of predictive analysis and LA comments. Residential flooding, large number of houses protected by opw defences

LA comments (am) Embankment protecting well under high tide level.(pm) All agreed

Meeting / discussion summary comments:

OPW comments • There are large areas of benefiting land (green area on GIS layer). • Estate close to river has flooded. • Significant embankments – green on GIS layer. • Lots of land drains for agricultural purposes, dug essentially to provide storage of surface water. • Embankment construction was for agricultural land protection, and embankments have been there for around 50 years. • Tidal limit of the Maigue is just upstream of Adare. • Mixed fluvial and tidal problem. • There are numerous back drains at the Adare scheme, draining land behind the embankments. • Development pressure south of river. • Hole in embankment u/s of school. • Raised embankment by Manor Court Estate.

Flood Risk Review Report – UoM 24 Adare V0_A 1

LA comments • The northwest corner of Manor Court housing estate is known to flood approx every 2 years. This is mainly on the roads and at present is seen as a more of a nuisance. • The adjacent sewage treatment works was recently upgraded. A proposal to pump sewage from Adare, through Patrickswell and on to Limerick has not progressed. This has not flooded, but is currently protected by the embankments. • Proposed development at Blackabbey has planning permission and can proceed if funded. However, the current planning permission may have expired.

1.4 PFRA Data

1.4.1 PFRA hazard PFRA mapping available in GIS layer: Yes No mapping PFRA mapping included on FRR map: Yes No

1.4.2 Summary of Type FRI score Principal Receptors (if available)

WWTP 25

Monuments 24 (LV)

Total: 1888.09

1.7 Stage 1 Aspect Clearly APSR Uncertain Evaluation Flood History (1.1) X OPW / LA Information (1.2) X PFRA Evaluation (1.4) X Overall Desktop Evaluation (if any above aspect is uncertain X then overall designation is uncertain)

1.8 Proposed level of Level A Site Visit assessment for Stage 2 site visits Level B Site Visit X

Flood Risk Review Report – UoM 24 Adare V0_A 2

Stage 2: Site Inspection Level B Assessment

Date and Time of Inspection Date: 13/04/11 Time: 10:00

Names of inspection team Iain Blackwell (including OPW/LA staff if present) Kelly Kasperczyk

2.3 Local No on-site comments. knowledge - on-site comments (OPW, LA and any info volunteered by local residents during visit)

2.4 Comments on 10-arch bridge on the Maigue, next to the School and Church could potentially hydraulic act as a restriction during significant fluvial flows as the arches are not large constrictions compared to the channel cross-sectional area. (bridges, etc.) and The tributary (watercourse A) is culverted twice in the town (twin culverts) for conveyance routes various road / access crossings.

2.6 Defence Assets

Formal and Open Channel Watercourses Informal Flood Man-made river channel Flood relief channel Canal Defence Assets Mill leat Drainage channels / back drains (include effective and ineffective Bridges and Culvert crossings assets to inform Single Arch bridge Multi-Arch bridge asset survey and Single Span bridge Multi-Span bridge potential Box culvert(s) Pipe culvert(s) Arch Culvert(s) mitigation measures) Culverted Watercourses (culvert length is greater than just a crossing) Box culvert(s) Pipe culvert(s) Arch Culvert(s) Irregular Culvert(s) Walls and Embankments Embankment(s) Raised wall(s) Retaining wall(s) Control Structures – weirs, gates, dams Fixed crest weir Adjustable weir Dam / Barrage Sluice gates Lock gates Radial gates Storage On-line storage (natural) On-line storage (artificial) Off-line storage Outfalls Flapped outfall(s) into watercourse Unflapped outfall(s) into watercourse i.e. from smaller watercourses, drains etc. into river / estuary / sea Tidal flap(s) Tidal sluice(s) i.e. from main watercourse into estuary / sea Other Pumping Station Erosion Protection Sand Dunes

Flood Risk Review Report – UoM 24 Adare V0_A 3

Additional notes (if required): Most FD assets in Adare are associated with the River Maigue. There is an additional tributary which flows through the centre of town and into the Maigue from the left bank which also has embankments and crossings / culverts associated with it. Some of these embankments are not effective as they are not tied into high ground (or other defences).

2.8 Initial Potential Mitigation Measures

Non-structural Planning and Development control measures Sustainable Urban Drainage Systems Flood forecasting / warning Change in Operating Procedures for water level control: Public awareness campaign Individual property protection Land use management Structural Strategic development management for floodplain development: measures (integration of measures into strategic development proposals) Storage: On-line Off-line Flow diversion: Flood relief channel Flood relief culvert Increase conveyance: Bridge works Channel works Floodplain Flood defences: Walls Embankments Localised works: Defence raising In-fill gaps Trash screen Maintenance works: Culvert / channel clearance Asset maintenance Relocation of properties: Improve existing defences: (describe) Other (describe):

Outcomes

Recommended APSR not an APSR IRR Designation

Summary comments (if Significant number of properties located behind the River Maigue required) Embankments along a tidal reach.

Flood Risk Review Report – UoM 24 Adare V0_A 4

Photo 2: Adare Castle and weir looking Photo 1: Main bridge over the River Maigue in Adare looking d/s u/s from main bridge in Adare

Photo 3: River Maigue embankment (left Photo 4: Typical drainage outfall through bank), d/s of main bridge the Maigue embankments

5 Flood Risk Review Report – UoM 24 Adare V0_A

Photo 6: Embankment adjacent to small Photo 5: River Maigue embankment (left bank) protecting properties behind tributary on left bank of the River Maigue

6 Flood Risk Review Report – UoM 24 Adare V0_A 143500 144000 144500 145000 145500 146000 146500 147000 147500 148000 148500 149000 149500 Adare 0 0 5 8 4 1 0 0 0 8 4 1 0 0 5 7 4 1

Legend APSR Boundary Rail Network 0 0

0 for CARs only Roads 7 4

1 Historic Flooding (National Roads Authority) Incidents Airport Land Water bodies mapped OPW Embankments from RADARSAT-2 * Historic Flood Data 0

0 Hydrometric Gauging 5

6 Architectural Heritage

4 Stations 1 EPA River Network UNESCO Sites Rail Stations Special Protection Area Special Area for Nursing Homes 0 Conservation 0 0

6 Residential Care Proposed National 4 1 for the Elderly Heritage Area Schools National Heritage Area Ports and Harbours Benefiting Lands

0 Flood Extents (PFRA, 2010) 0

5 OPW Buildings 5

4 10% AEP Flood Extent 1 Health Centres (1 in 10 chance in any given year) Garda Stations 1% AEP Flood Extent Hospitals (1 in 100 chance in any 0 0

0 given year)

5 Fire Stations 4

1 0.1% AEP Flood Extent Civil Defence (1 in 1000 chance in any Head Quarters given year)

Airports * Data Source - Service Régional de Traitement d’Image et de Télédétection (SERTIT) (acquired on the 5th of December 2009). 0 0 5 4 4 1

Client 0 0

0 Project

4 Shannon CFRAM Study 4

1 The PFRA Flood Extents shown are indicative. They have been developed using Flood Risk Review Map Title simple and cost-effective methods that are suitable for the PFRA. They should not be Adare used for local decision-making or any other purpose without verification. Drawing Status FINAL Job No. 32102500 Figure No. Revision CAR 3 0

0 Scale 1:20,000 @ A3 Jun 28, 2011

5 Checked Review Approved Drawn

3 AD/SF JC KK/JM IB/PS 4

1 Copyright reserved 0 0.2 0.4 0.8 Includes Ordnance Survey data reproduced under OSi Licence number EN0021011. Jacobs UK Ltd Km Unauthorised reproduction infringes Ordnance Survey Ireland and Government of Ireland copyright, © Ordnance Survey Ireland, 2011. 95 Bothwell Street, Glasgow, G2 7HX