Location: , Co. Westmeath Unique ID: 250431 (from PFRA database) Initial OPW Designation APSR AFRR IRR Co-ordinates Easting: 243908 Northing: 252942 River / Catchment / Sub-catchment / Brosna / Shannon 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 Brosna flows south through Mullingar. Its source is Lough Owel, Floodmaps.ie) just upstream of Mullingar. Land upstream of Mullingar is low lying and there are a significant number of drainage ditches collecting surface water which all flow into the Brosna upstream of Mullingar. The Brosna flows south from Mullingar into Lough Ennel. Flood Event Records Nine flood records are listed in floodmaps.ie. The only dated events were in November of 1965. The Mullingar sewerage improvement scheme was implemented after this flooding in an effort to alleviate future flood risk.

PFRA database comments (in italics): 1.2 Relevant information on OPW comments flooding issues from Flood Relief works currently in progress Designated APSR on the basis of OPW and LA staff predictive analysis. FRS

LA comments Brosna not posing a massive risk, but elevated to the South of the low lying town. (150 years old).Lough Owel is the supply of the Canal.Cusack Park, CommercialResidential /SligoLocal Area OfficesAlso stormwater/pluvial issuesFeed f

Meeting / discussion summary comments:

OPW comments • The scheme in Mullingar was completed in 2010 and alleviates flood risk to the 100 year level. • Tony Cawley has a hydro model for Mullingar. • There is a risk of flooding from the canal – not historic. • In 1967 there was a flood from the royal canal when there may have been excessive flow from the supply canal.

LA comments • Westmeath CC is looking at issues relating to potential breaches in the canal embankment. • Westmeath CC considers there to be a flood risk from the Brosna in Mullingar. • Previous scheme completed due to historical flood risk. Westmeath CC is not convinced that the scheme has fully alleviated the flood risk in Mullingar.

Flood Risk Review Report – UoM 25 26 Mullingar V0_A 1

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) Monument_LV 22.1

Arch_Regional 20

Arch_Local 0.1

Total 590.3

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

2 Flood Risk Review Report – UoM 25 26 Mullingar V0_A

Stage 2: Site Inspection Level B Assessment

Date and Time of Inspection Date:13/04/11 Time:09:00

Names of inspection team Peter Smyth (including OPW/LA staff if present) James Murray

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 There are several hydraulic constrictions through Mullingar and the area will hydraulic require significant investigation and ground proofing of hydraulic models to constrictions ensure these constraints are considered correctly. (bridges, etc.) and One significant area noted is in the centre of Mullingar where the Brosna is conveyance routes split. The main river channel is culverted through a park area near the school. The culvert has an overflow off it’s right wall to allow water to flow through a man made channel which acts as a water feature for the adjacent hotel. The culvert discharges downstream of the hotel where the channel rejoins with the Brosna.

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)

Flood Risk Review Report – UoM 25 26 Mullingar V0_A 3

i.e. from main watercourse into estuary / sea Other Pumping Station Erosion Protection Sand Dunes Additional notes (if required):

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 Mullingar has a history of flooding. The PFRA mapping predicts an (if required) ongoing significant flood risk with this conclusion supported by both the Local Authority and the OPW. Mullingar was confirmed as an APSR following a desk based assessment, with no on-site verification required.

Flood Risk Review Report – UoM 25 26 Mullingar V0_A 4

Photo1: Screen on the River Brosna Photo 2: River Brosna downstream of upstream of Mullingar town centre, looking Mullingar town centre, looking upstream. downstream.

Photo 3: River Brosna upstream of Photo 4: River Brosna downstream of Council office in Mullingar, looking Mullingar in area earmarked for industrial downstream. development, looking downstream.

5 Flood Risk Review Report – UoM 25 26 Mullingar V0_A 240000 240500 241000 241500 242000 242500 243000 243500 244000 244500 245000 245500 246000 246500 247000 247500 Mullingar 256500

256000 ± 255500 255000

Legend

254500 APSR Boundary Rail Network for CARs only Roads Historic Flooding (National Roads Authority) @@! Incidents Airport Land

254000 Water bodies mapped OPW Embankments from RADARSAT-2 * Historic Flood Data H Hydrometric Gauging G ! Stations Architectural Heritage EPA River Network ^_ UNESCO Sites 253500 !R Rail Stations Special Protection Area Special Area for N ! Nursing Homes Conservation Residential Care Proposed National

253000 N ! for the Elderly Heritage Area !E Schools National Heritage Area !] Ports and Harbours Benefiting Lands Flood Extents (PFRA, 2010) 252500 !O OPW Buildings 10% AEP Flood Extent !!H Health Centres (1 in 10 chance in any given year) !G Garda Stations 1% AEP Flood Extent 252000 !H Hospitals (1 in 100 chance in any given year) !F Fire Stations 0.1% AEP Flood Extent # Civil Defence (1 in 1000 chance in any ! Head Quarters given year) 251500 o ! Airports * Data Source - Service Régional de Traitement d’Image et de Télédétection (SERTIT) (acquired on the 5th of December 2009).

251000 Client

Project Shannon CFRAM Study

250500 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 Mullingar used for local decision-making or any other purpose without verification. Drawing Status FINAL Job No. 32102500 Figure No. Revision CAR 42 Scale 1:25,000 @ A3 Jun 28, 2011 250000 Checked Review Approved Drawn AD/SF JC KK/JM IB/PS Copyright reserved 0 0.25 0.5 1 Includes Ordnance Survey Ireland 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