Location: Carrick on Shannon, Co. Leitrim Unique ID: 260455 / Cortober Co. (from PFRA database) Initial OPW Designation APSR AFRR IRR Co-ordinates Easting: 193796 Northing: 299561 River / Catchment / Sub-catchment / 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 Shannon flows through Carrick on Shannon on the left bank and Floodmaps.ie) Cortober on the right bank. Many small tributaries to the River Shannon are located within the Carrick on Shannon / Cortober town boundary. The River Shannon is crossed by the N4 Sligo Road just south of the town centre. Several tributaries to the River Shannon are located within the Carrick on Shannon/Cortober town boundaries, which are crossed at various locations. Cortober in is considered as part of the Carrick on Shannon study area. Flood Event Records Seven flood records are listed in floodmaps.ie. These events in include events in 1954 and 1999 detailing flooding from the Shannon.

PFRA database comments (in italics): 1.2 Relevant information on OPW comments flooding issues from Designated APSR on the basis of predictive analysis and LA comments. OPW and LA staff Combine with Cortober. Approved – APSR

LA comments Flooding here affects commercial properties, limited residential properties as the residential properties affected here tend to be built in past 10 years and the finished floor level was thus specified to be above the 0.1% AEP flood level. Parts of t Flood risk mapping, strategic drainage areas & blocked roads provided by LA. Foul sewer pumping stations & water treatment plant under threat, R280 closed (20/11/09), N4 flooded and kept open by pumping. Cortober (Roscommon) worst affected area.

Meeting / discussion summary comments:

OPW comments • Not all Shannon floodplain-related flooding; e.g. Park Lane where water passing along a former river channel didn’t reach the Shannon. • Cortober is severely affected by flooding. Newer buildings don’t flood, but their access roads do. SuperValu is known to have flooded.

LA comments • Water intake for public water supply to 18-20,000 people in South Leitrim (9000m3 per day). Wasn’t flooded in 2009, but was only “2

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inches (50mm) off”. Had to provide alternative intake. • Doctors surgery was cut off • Cryan’s hotel was flooded. The hotel was built to a lower Final Floor Level, contrary to planning recommendations. These were adopted just prior to Nov 09 event. • Cinema, medical centre and SuperValu affected. • Roads to north of town centre cut off. • Tesco planning application included Flood Risk Assessment. Tesco was constructed on stilts and did not flood in the 2009 event.

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) Fire Station 250

Civil Defence 25

Arch_Local_ 10

Arch_Regional_ 31.1

Monument_LV 20

Total 1434.55 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

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Stage 2: Site Inspection Level B Assessment Date: 27/04/11 Date and Time of Inspection Time: 10:00 Mathieu Valois Names of inspection team (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 The N4 crossing of the Shannon is a brick arch bridge comprised of five arches hydraulic in bank and one additional relief arch. The bridge has a high spring and soffit constrictions level with good conveyance capacity. When considering the magnitude of (bridges, etc.) and flooding from the Shannon it is likely that the bridge acts as a constriction to conveyance routes flow in extreme events. There are several other bridges and culverts on the tributaries to the Shannon on both left and right banks. The tributary on the right bank near the fire station is culverted for a long distance under a rugby pitch. The inlet to the culvert is within 200m of the fire station.

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)

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

Flood Risk Review Report – UoM 25 26 Carrick On Shannon V0_A 4

Photo1: Shannon at Carrick on Shannon, Photo 2: Upstream face of bridge over the looking upstream Shannon at Carrick on Shannon

Photo 3: Downstream face of bridge over Photo 4: Tributary to the Shannon at the Shannon at Carrick on Shannon Carrick on Shannon

5 Flood Risk Review Report – UoM 25 26 Carrick On Shannon V0_A 191500 192000 192500 193000 193500 194000 194500 195000 195500 196000 196500 197000 197500 Carrick on Shannon / Cortober 0 0 0 2

0 3 ± 0 0 5 1 0 3 0 0 0 1 0 3 Legend APSR Boundary Rail Network

0 for CARs only

0 Roads 5

0 Historic Flooding (National Roads Authority) 0 @! 3 @ Incidents Airport Land Water bodies mapped OPW Embankments from RADARSAT-2 * Historic Flood Data Hydrometric Gauging 0 H G 0 ! Architectural Heritage 0 Stations 0 0

3 EPA River Network ^_ UNESCO Sites !R Rail Stations Special Protection Area Special Area for N ! Nursing Homes Conservation 0 0 Residential Care Proposed National 5 N 9 ! 9 for the Elderly Heritage Area 2 !E Schools National Heritage Area !] Ports and Harbours Benefiting Lands Flood Extents (PFRA, 2010)

0 !O OPW Buildings 0 !

0 10% AEP Flood Extent 9

9 !H Health Centres (1 in 10 chance in any 2 ! given year) !G Garda Stations 1% AEP Flood Extent !H Hospitals (1 in 100 chance in any

0 given year)

0 F Fire Stations

5 !

8 0.1% AEP Flood Extent 9 2 # Civil Defence (1 in 1000 chance in any ! Head Quarters given year) o ! Airports * Data Source - Service Régional de Traitement d’Image et de Télédétection (SERTIT) (acquired on the 5th of December 2009). 0 0 0 8 9 2 Client

0 Project

0 Shannon CFRAM Study 5

7 The PFRA Flood Extents shown are indicative. They have been developed using Flood Risk Review Map 9

2 Title simple and cost-effective methods that are suitable for the PFRA. They should not be Carrick on Shannon / Cortober used for local decision-making or any other purpose without verification. Drawing Status FINAL Job No. 32102500 Figure No. Revision CAR 16 Scale 1:20,000 @ A3 Jun 30, 2011 Checked Review Approved Drawn AD/SF JC KK/JM IB/PS Copyright reserved 0 0.3 0.6 1.2 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