Location: , Co. Roscommon Unique ID: 260445 (from PFRA database) Initial OPW Designation APSR AFRR IRR Co-ordinates Easting: Northing: River / Catchment / Sub-catchment River / Boyle / 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 area for flood risk review is immediately downstream of Lough Gara on Floodmaps.ie) the Boyle River which flows easterly towards the town of Boyle and . This length of watercourse is unmodified with no significant hydraulic constrictions. Flood Event Records No flood records are listed in floodmaps.ie PFRA database comments (in italics): 1.2 Relevant information on OPW comments flooding issues from Not designated APSR. Included in MPW OPW and LA staff LA comments Historical, Flood scheme carried out in 1980’s – 1990’s * Local Authority water scheme source (North Roscommon Regional Water Scheme)

Meeting / discussion summary comments:

OPW comments • No properties are at risk, PFRA score is based on Cultural Heritage.

LA comments • Lough Gara is drained by the Boyle - -not an issue for Roscommon County Council – no further information.

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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 1296

Total 1556

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 X assessment for Stage 2 site visits Level B Site Visit

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Stage 2: Site Inspection Level A Assessment Date: 12/05/11 Date and Time of Inspection Time: 18:00 Peter Smyth Names of inspection team (including OPW/LA staff if present) James Murray

2.1 Ground- Fluvial non-tidal Fluvial tidal Coastal Not available truthing of Hazard Hazard mapping seems reasonable through the Lough Gara area for flood risk Mapping review

2.2 Spot check Receptor Type Location description Exists? Overall ground-truthing of (if not obvious) Vulnerability selected receptor / Risk vulnerability (L / M / H) Crannogs Series of crannogs on Yes Low (also note any key both banks of the Boyle receptors noted downstream of Lough during visit that are Gara not identified by PFRA)

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 None. hydraulic constrictions (bridges, etc.) and conveyance routes

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2.5 SVRS Assessment Matrix

Weightings: A - x1 - reasonable expectation of flooding B - x2 - high expectation of flooding C - x5 - risk to life Approx. Number 1 to 4 5 to 20 >20 Weighting A B C A B C A B C

Property 10 100 200 (domestic) Property 20 200 400 (small retail or business) Property 50 500 1000 (large retail or business) Road or Rail Infrastructure 30 300 600

Critical Infrastructure (local) 50 500 1000 [hospital, school, police/fire/ambulance station, substation, WTW/WWTW, gov bldg, other (specify)] Critical Infrastructure (national 250 1000 2000 importance) Cultural Heritage Site 20 X 200 400

Environmental Designated Site 20 200 400

Hazardous Substances Site 50 500 1000

Total SVRS 20

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

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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

PFRA Designation APSR not an APSR IRR FRI Score: 1556 Site Ground-truthing of High Uncertain Low Not available PFRA Assessment Confidence Confidence (hazard mapping and (good) (poor) receptors) X Site Visit Review Score 20 Recommended APSR not an APSR IRR Designation

Summary Comments The Lough Gara area for flood risk review is uninhabited. Lough Gara is (if required) included in this flood risk review as a result of flood risk to Crannogs which are classified as historic monuments. For the purposes of this risk review the entire area has been considered a cultural heritage site – individual Crannogs have not been scored. The risk associated with these Crannogs is considered to be low. This is mainly due to the unmodified nature of the River Boyle through the site. There are an insufficient number of critical receptors at significant risk of flooding to warrant designation as an APSR.

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Photo1: Outlet from Lough Gara. Photo 2: Immediately downstream of Lough Gara.

Photo 3: Landscape at the AFRR Lough Photo 4: River Boyle further downstream Gara. at the AFRR Lough Gara.

6 Flood Risk Review Report – UoM 25 26 Lough Gara V0_A 173000 173500 174000 174500 175000 175500 176000 176500 177000 Lough Gara 303000

302500 302000

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

301500 Water bodies mapped OPW Embankments from RADARSAT-2 * Historic Flood Data Hydrometric Gauging Stations Architectural Heritage EPA River Network UNESCO Sites Rail Stations Special Protection Area Special Area for Nursing Homes

301000 Conservation Residential Care Proposed National for the Elderly Heritage Area Schools National Heritage Area Ports and Harbours Benefiting Lands Flood Extents (PFRA, 2010) OPW Buildings 10% AEP Flood Extent 300500 Health Centres (1 in 10 chance in any given year) Garda Stations 1% AEP Flood Extent Hospitals (1 in 100 chance in any given year) Fire Stations 0.1% AEP Flood Extent Civil Defence (1 in 1000 chance in any Head Quarters given year) 300000

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

Client 299500 Project Shannon CFRAM Study 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 Lough Gara used for local decision-making or any other purpose without verification. Drawing Status FINAL Job No. 32102500 Figure No. Revision AFRR31 Scale 1:15,000 @ A3 Jul 01, 2011 Checked Review Approved Drawn AD/SF JC KK/JM IB/PS Copyright reserved 299000 0 0.15 0.3 0.6 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