Midleton to Youghal Greenway Flood Risk Assessment

 
 
Midleton to Youghal Greenway
Flood Risk Assessment

Cork County Council




September 2018
Midleton to Youghal Greenway Flood Risk Assessment                                               Cork County Council




Quality information
Prepared by                                Checked by                          Approved by




Joanne Titterington                        Richard Reid                        Karol McCusker




Revision History
Revision              Revision date         Details             Authorized   Name               Position
0                     27-09-2017            Draft First Issue                Karol McCusker     Associate
1                     12-10-2017            Final Issue                      Karol McCusker     Associate
2                     03-09-2018            Route                            Karol McCusker     Associate
                                            Amendment




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Midleton to Youghal Greenway Flood Risk Assessment                           Cork County Council




Prepared for:




Prepared by:
Joanne Titterington

AECOM Infrastructure & Environment UK Limited
Beechill House
Beechill Road
Belfast
BT8 7RP

T: +44(28)9070 5111
aecom.com




© 2017 AECOM Infrastructure & Environment UK Limited. All Rights Reserved.
This document has been prepared by AECOM Infrastructure & Environment UK Limited
(“AECOM”) for sole use of our client (the “Client”) in accordance with generally accepted
consultancy principles, the budget for fees and the terms of reference agreed between
AECOM and the Client. Any information provided by third parties and referred to herein has
not been checked or verified by AECOM, unless otherwise expressly stated in the document.
No third party may rely upon this document without the prior and express written agreement
of AECOM.




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Midleton to Youghal Greenway Flood Risk Assessment                                                             Cork County Council




Table of Contents
1.  INTRODUCTION ......................................................................................................... 1
    1.1 Background ........................................................................................................ 1
    1.2 Scope of Services ............................................................................................... 1
2.  SITE INFORMATION ................................................................................................... 2
    2.1 Site Description................................................................................................... 2
    2.2 Proposed Works ................................................................................................. 2
    2.3 Visual Survey ...................................................................................................... 2
    2.4 Site Survey ......................................................................................................... 3
    2.5 Local Hydrology, Land Use and Existing Drainage .............................................. 4
3.  STAGE 1 – FLOOD RISK IDENTIFICATION ................................................................ 5
    3.1 Hydrometric Data ................................................................................................ 5
    3.2 OPW Flood Hazard Maps ................................................................................... 5
    3.3 Groundwater Wells and Springs.......................................................................... 6
    3.4 OSi Flood Mapping ............................................................................................. 7
    3.5 OPW Draft Predictive Flood Mapping.................................................................. 7
    3.6 Irish Coastal Protection Strategy Study (ICPSS) ................................................. 9
    3.7 OPW Draft CFRAM Mapping ............................................................................ 10
    3.8 Cork County Council County Development Plan ............................................... 13
    3.9 Ordnance Survey Historic Mapping ................................................................... 13
    3.10 Screening Assessment Conclusion ................................................................... 14
4.  STAGE 2 – INITIAL FLOOD ASSESSMENT .............................................................. 16
    4.1 Context ............................................................................................................. 16
    4.2 Determination of Flood Zone............................................................................. 17
    4.2.1 Coastal Flooding ............................................................................................... 17
    4.2.2 Pluvial Flooding ................................................................................................ 17
    4.2.3 Fluvial Flooding................................................................................................. 17
    4.2.4 Determination of Flood Zone – Findings ........................................................... 17
    4.3 Justification Test................................................................................................ 17
    4.4 Mitigation Measures .......................................................................................... 18
5.  CONCLUSIONS AND RECOMMENDATIONS ........................................................... 19
Appendix A Photographs ........................................................................................................ I
Appendix B Drawings ............................................................................................................ II
Appendix C Flood Maps ....................................................................................................... III




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Figures
Figure 1. Midleton-Youghal Proposed Greenway Route ........................................................ 1
Figure 2. Typical Condition of the Disused Railway at Ballinascartha .................................... 3
Figure 3. Typical Condition of the Disused Railway at Clashdermot ...................................... 3
Figure 4. Existing Youghal Coastal Defences ........................................................................ 4
Figure 5. Gauging Stations between Midleton and Youghal................................................... 5
Figure 6. OPW Flood Hazard Map - Historical records of flood events near Mogeely ............ 6
Figure 7. OPW Flood Hazard Map - Historical records of flood events in Youghal ................. 6
Figure 8. Rising Wells or Springs along the Proposed Greenway .......................................... 7
Figure 9. OSi Flood Maps showing Known Risk Areas along Proposed Greenway ............... 7
Figure 10. PFRA Predictive Flooding Extents – Midleton ...................................................... 8
Figure 11. PFRA Predictive Flooding Extents - Mogeely & Killeagh....................................... 8
Figure 12. PFRA Predictive Flooding Extents - Youghal ........................................................ 9
Figure 13. ICPSS Flood Extent Extract - Youghal................................................................ 10
Figure 14. ICPSS Depth Map Extract - Youghal .................................................................. 10
Figure 15. CFRAM Coastal and Fluvial Flood Maps along the Proposed Greenway ............11
Figure 16. CFRAM Extract - Midleton Railway Station Fluvial Flood Risks ...........................11
Figure 17. CFRAM Extract – Fluvial Flood Risk at Moanlahan Viaduct, Killeagh ................. 12
Figure 18. Moanlahan Viaduct over the Dissour River ......................................................... 12
Figure 19. CFRAM Extract – Coastal Flood Risk, Youghal .................................................. 13
Figure 20. 25inch Historic Map ............................................................................................ 14
Figure 21. 6inch Historic Map at Ballyvergan Bog ............................................................... 14


Tables
Table 1. CFRAM Predicted Flood Levels ............................................................................. 12
Table 2. Possible Flood Mechanisms – Proposed Greenway .............................................. 15
Table 3. Flood Zone Description .......................................................................................... 16
Table 4. Justification Test Matrix .......................................................................................... 17




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Midleton to Youghal Greenway Flood Risk Assessment                                 Cork County Council




1.           INTRODUCTION
Cork County Council has appointed AECOM to prepare a Flood Risk Assessment (FRA) to
accompany a planning application for a proposed greenway between Midleton and Youghal
along a disused railway corridor.
The proposed Greenway extends from Midleton Train Station to the former Youghal Train
Station within the footprint of the disused railway corridor. The proposed greenway is
intended to serve as a public amenity for recreation, transportation and tourism purposes.
In accordance with the planning process there is a requirement to undertake a Stage 1 & 2
Flood Risk Assessment Report, which will accompany the planning application.
The extent of the proposed route between Midleton and Youghal is shown below in Figure 1.


                                                                                      Youghal


       Midleton



                                                 Midleton-Youghal Railway




Figure 1. Midleton-Youghal Proposed Greenway Route


1.1          Background
A site-specific flood risk assessment in respect of the proposed development is required as
part of the planning process for the works.

1.2          Scope of Services
AECOM is required to undertake a site-specific Flood Risk Assessment (FRA) for the
proposed Midleton to Youghal Greenway route.
This FRA study has been undertaken in consideration of the following guidance document:

              ‘The Planning System and Flood Risk Management – Guidelines for Planning
               Authorities’ DOEHLG 2009.
The assessment will demonstrate that the proposed development will:
     1. Not increase flood risk elsewhere and, if practicable, will reduce overall flood risk.
     2. Include measures to minimise flood risk to people, property, the economy and the
        environment as far as reasonably possible.
     3. Include measures to ensure that residual risks to the area and/or development can
        be managed to an acceptable level as regards the adequacy of existing flood
        protection measures or the design, implementation and funding of any future flood
        risk management measures and provisions for emergency services access.




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Midleton to Youghal Greenway Flood Risk Assessment                              Cork County Council




2.           SITE INFORMATION
2.1          Site Description
The Cork Cycle Network Plan identifies the designation of a pathway from Youghal to
Midleton as a relevant strategy in the Cork City and County Development Plans. The
pathway is a considerable element to the greenway of the south coast of Ireland as it lies
along the EuroVelo 1 route (EV1), a project of the European Cyclists’ Confederation,
spanning from North Cape in Norway to Sagres in Portugal.
The Midleton to Youghal Greenway route commences at a proposed car park on Council
owned lands adjacent to the northern entrance of Midleton train station, in Midleton town.
This 630m stretch of proposed route is located outside the operational area of the railway in
overgrown lands to the north of the existing railway footprint. The greenway then connects
into the original railway alignment and continues within the line of the disused railway
embankments and within cuttings. The route runs through agricultural lands and small
villages, including Mogeely (where there is a proposed car park adjoining the former station)
and Knockeagh, terminating at the disused Youghal train station.
Initial drawings of the proposed works can be found in Appendix B of this report.

2.2          Proposed Works
The proposed works consists of:

              Clearing the existing site of overgrown vegetation and extant railway apparatus
               along the route from Youghal to Midleton. Where the route profile has been
               defeated by vegetation it is assumed that the pathway will be restored to an
               appropriate level.
              Localised repair or, where necessary, replacement of bridges and culverts
               associated with the railway.

              Constructing approximately 22.75km of new 3-4m wide pedestrian and cycle
               pathway on the footprint of the disused railway.

              Road crossings will be provided in accordance with standards and signage and
               ancillary amenity facilities will be installed along the route.

              Additional works will include the provision of accommodation measures where
               required (e.g. fencing and agricultural crossings).

2.3          Visual Survey
A visual examination of the disused railway line has been obtained from Google Streetview
imagery where the vehicular road network intersects the proposed route. Figure 2 and
Figure 3 below give an overview of the typical current condition of the disused railway line.
More images of the condition of the disused railway can be seen in Appendix A.




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Midleton to Youghal Greenway Flood Risk Assessment                            Cork County Council




Figure 2. Typical Condition of the Disused Railway at Ballinascartha




Figure 3. Typical Condition of the Disused Railway at Clashdermot


2.4         Site Survey
A survey was of the study area was provided to AECOM by Cork County Council. All levels
are relative to Ordnance Datum (O.D.).
The level of the old railway varies above and below the level of the adjacent land with the
exception of a few locations where the vehicular network intersects at grade. The western
section of the route from Midleton to Mogeely appears to have land drains either side of the
route. From Mogeely to Youghal the route is less defined with minimal land drains running
adjacent to the railway line.




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Midleton to Youghal Greenway Flood Risk Assessment                               Cork County Council




2.5         Local Hydrology, Land Use and Existing Drainage
The proposed site crosses several water channels between Youghal and Midleton, namely
the River Dissour, Kiltha, Dungourney and their tributaries. The river channels flow from
north to south east, draining the higher lands and discharging into the Celtic Sea. The former
rail corridor bridges all of the aforementioned rivers but is mostly intersected by agricultural
drains. Survey levels suggest that most of these drains are in adequate condition. Where
necessary, it is assumed that drains will be retained and restored along the greenway.
Figure 4 below shows the proposed route finishing at Youghal, a coastal town on the estuary
of the River Blackwater. The town has approximately a 330m stretch of stepped concrete
sea wall providing protection to the promenade. This was improved as part of a 1970s
initiative, along with timber groynes, to provide increased protection from coastal flooding
and erosion. To the south of the promenade and sea wall, coastal protection is in part
achieved through natural means by sand dunes.



                                                                         Sea Wall


                                                                                    Elevated
            Approximate Rail Corridor                                                 Land




     Claycastle Beach
                                                     Sand Dunes


Figure 4. Existing Youghal Coastal Defences




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Midleton to Youghal Greenway Flood Risk Assessment                                 Cork County Council




3.          STAGE 1 – FLOOD RISK IDENTIFICATION
The purpose of Stage 1 is to establish whether a flood‐risk issue exists or may exist in the
future. If there is a potential flood risk issue then, in accordance with ‘The Planning System
and Flood Risk Management – Guidelines for Planning Authorities (DOEHLG 2009)’, the
flood risk assessment procedure should move to ‘Stage 2 – Initial flood risk assessment’. If
no potential flood risk is identified during Stage 1 then the overall flood risk assessment can
be concluded.
The following information and data was collated as part of the screening assessment for the
proposed greenway.

3.1         Hydrometric Data
Existing sources of hydrometric data from the OPW (www.waterlevel.ie) were investigated.
This investigation has determined that the closest gauging station to the proposed greenway
route is Ballycotton (19068), located approximately 15 km southeast of Midleton as shown in
Figure 5 below.


                              Approximate Rail Corridor




                                                     Ballycotton Gauging Station




Figure 5. Gauging Stations between Midleton and Youghal

The presence of the gauging station is noted however the information is of limited benefit to
this study as the station only monitors coastal levels.



3.2         OPW Flood Hazard Maps
The OPW Flood Hazard Maps Website (www.floodmaps.ie) was consulted in relation to
available historical or anecdotal information on any flooding incidences or occurrence in the
vicinity of the proposed development area. Figure 6 and Figure 7 below show mapping from
the aforementioned website, which indicates that there are a few historical records of
flooding which have occurred in close proximity to the proposed greenway.




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                                    Pluvial                 Coastal
                                Flooding Event           Flooding Event

Figure 6. OPW Flood Hazard Map - Historical          Figure 7. OPW Flood Hazard Map - Historical
records of flood events near Mogeely                 records of flood events in Youghal

On the 19th of November 2009, there was a recorded flood event in Garranejames, Co. Cork,
as indicated in Figure 6. This was a pluvial flood event caused by poor surface water
drainage occurring in the Dower/Womanagh catchment. The flood event impacted a 300m
stretch of a local road and pasture land. The flood report did not mention any effects on the
nearby railway. The maximum flood level was recorded as 18.3mOD. The survey measured
the minimum level of the existing rail corridor ranging from approximately 18.5m to 21.3m in
the immediate area of this historical flood event. Based on these levels it can be presumed
that the flood event would not have impacted the proposed greenway route.
Flooding has also been recorded along Youghal Strand at times of extreme high tides and
wind surges, in particular in 1962 and 2004. Figure 7 shows the locations where roads and
properties have experienced flooding and damage due to coastal surges. The flooding report
from 1962 details an extreme coastal surge causing destruction to sea front properties and
existing sea defences. This flooding event has encouraged gradual repairs and
improvements to the sea wall and defences. The 2004 report discusses the impact of a
storm surge on multiple locations along the coast and inland. Relative to the proposed
greenway route, there were reports of coastal surges at Claycastle beach (location identified
in Figure 4) and Youghal town caused by high tides and extreme wind surges.



3.3         Groundwater Wells and Springs
An investigation into the rise and abstraction of water from underground wells and springs
around the site was taken from the Department of Communications, Climate Change and
Environment (http://dcenr.maps.arcgis.com). This was to identify if there are any areas of
rising groundwater that could contribute to flooding.




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Midleton to Youghal Greenway Flood Risk Assessment                             Cork County Council




                                                     Proposed Greenway



Figure 8. Rising Wells or Springs along the Proposed Greenway

Figure 8 shows that there are multiple springs or wells along the route of the proposed site.
There have been no recorded issues with these groundwater sources contributing to flooding
within the area.

3.4         OSi Flood Mapping
Figure 9 below shows the areas identified in the OSi Flood Maps GeoHive viewer
(http://map.geohive.ie/) as being susceptible to flooding and marshy ground conditions. The
section of the proposed route within this area is between Colerenagh and Summerfield, with
Ballyvergan Bog to the north of the disused railway line and a known floodplain to the south.



                                                          Proposed Greenway



                                    Ballyvergan Bog



                                                               Floodplain




Figure 9. OSi Flood Maps showing Known Risk Areas along Proposed Greenway

The mapping suggests that the proposed route passes through the area of risk but is not
affected. This is the only area specifically identified along the proposed greenway route in
this data source.

3.5         OPW Draft Predictive Flood Mapping
Preliminary Flood Risk Assessment (PFRA) Mapping has been produced by the OPW for
Ireland. The PFRA predictive flood map number 2019/MAP/39/A, 2019/MAP/40/A and
2019/MAP/41/A are included in Appendix C. These illustrate predicted flood zones within the
area.
Figure 10 to Figure 12 below are extracts from the above PFRA maps in the vicinity of the
proposed route.


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Midleton to Youghal Greenway Flood Risk Assessment                              Cork County Council




                      Midleton-Youghal Railway




Figure 10. PFRA Predictive Flooding Extents – Midleton




                                                     Midleton-Youghal Railway




Figure 11. PFRA Predictive Flooding Extents - Mogeely & Killeagh




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Midleton to Youghal Greenway Flood Risk Assessment                              Cork County Council




                      Midleton-Youghal
                          Railway




Figure 12. PFRA Predictive Flooding Extents - Youghal

The PFRA predictive mapping above indicates that there is a risk from potential coastal and
fluvial flooding. It should be noted that the predicted extent of flooding illustrated on these
maps was developed in 2011 using a low resolution digital terrain model (DTM) and is
intended to be indicative only. The PFRA mapping was produced to locate which areas were
to be taken forward for the CFRAM Study.

3.6         Irish Coastal Protection Strategy Study (ICPSS)
The Irish Coastal Protection Strategy Study (IPCSS) was undertaken between 2005 and
2011 to produce an overview of coastal flood hazards at a strategic level. The findings of
this study were then incorporated in to the OPW PFRA mapping.
The ICPSS data provides flood levels for a number of flood event probabilities in terms of
percentage Annual Exceedance Probability (AEP). Depth data is provided for the 0.5% AEP
event and flood extents are provided for the 0.1% and 0.5% AEP events. Figure 13 and
Figure 14 provide extracts of the ICPSS mapping. These maps illustrate the same coastal
flood extents as the OPW PFRA maps and are included in Appendix B.




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Midleton to Youghal Greenway Flood Risk Assessment                          Cork County Council




       Midleton-Youghal Railway




Figure 13. ICPSS Flood Extent Extract - Youghal




            Midleton-Youghal Railway




Figure 14. ICPSS Depth Map Extract - Youghal


3.7         OPW Draft CFRAM Mapping
Draft mapping has been produced under the Catchment Flood Risk Assessment and
Management (CFRAM) project by OPW. The CFRAM mapping is the most recent published
publically available information. The CFRAM project utilised a 1D-2D hydraulic model which
is seen as more accurate than 1D modelling alone.
The Midleton-Youghal area falls under the South West CFRAM study with the proposed site
covered on the following drawings:

     I19MBC_EXFCD_F1_Sht038
     MMD/296235/E/DR/I19HKL/EXFCDEXF/F/Sht001
     MMD/296235/E/DR/I19HKL/EXFCDEXF/F/Sht002
     MMD/296235/E/DR/I19HCR/EXFCDEXF/F/Sht001
     MMD/296235/E/DR/I18HYL/EXCCDEXC/F/Sht006
     MMD/296235/E/DR/I18HYL/EXCCDEXC/F/Sht007


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Midleton to Youghal Greenway Flood Risk Assessment                                        Cork County Council




These drawings are included in Appendix C with extracts of area of interest included below.




                 Approximate Midleton-Youghal
                     Proposed Greenway




Figure 15. CFRAM Coastal and Fluvial Flood Maps along the Proposed Greenway

Figure 15 shows the fluvial and coastal flood risk zones along the proposed greenway
determined from the CFRAM maps. Figure 16-18 below illustrate extracts from the above
CFRAM flood extent maps in the vicinity of the proposed route.



                                                                          Midleton Railway
                                                                               Station




                                                                 End of Line for currently in-use
                                                                 railway/Beginning of greenway




Figure 16. CFRAM Extract - Midleton Railway Station Fluvial Flood Risks

Figure 16 to Figure 18 shows that the current railway to the west of the Midleton Railway
Station is located in high risk and medium risk zones. The railway to the west of the Midleton
Railway station is still in use and would not form a part of the proposed greenway route. The
start of the greenway route is proposed to be located to the east, outside of the flood extent
zones.




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Midleton to Youghal Greenway Flood Risk Assessment                                            Cork County Council




                                                                                        Midleton-
                                                                                     Youghal Railway




Figure 17. CFRAM Extract – Fluvial Flood Risk at Moanlahan Viaduct, Killeagh

Figure 17 indicates that the disused railway passes across the Dissour River and is located
in a high flood risk zone. The elevation survey is of poor quality around this section and
cannot be used to confirm the presence of a bridge. Further investigation shows that there is
a railway bridge set on twin piers over the Dissour River (shown below in Figure 18). This is
the location for the monitoring point 19EAGH00242A shown in the CFRAM extract.




Figure 18. Moanlahan Viaduct over the Dissour River

Table 1 below provides the predicted flood levels for the node located at the river crossing
below Killeagh, indicated in Figure 18.
Table 1. CFRAM Predicted Flood Levels

                                                           Water Levels (mOD Malin) per AEP
                                                       3
    Node Label              WL 10%         Flow (m /s)     WL 1%     Flow (m 3/s)   WL 0.1%      Flow (m 3/s)

 19EAGH00242A                 12.18             13.5       12.37         19.9        12.56             28.9




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Midleton to Youghal Greenway Flood Risk Assessment                                       Cork County Council




                                            Midleton-Youghal Railway




                                                                       End of greenway at Youghal




Figure 19. CFRAM Extract – Coastal Flood Risk, Youghal

Figure 19 indicates the coastal flood risks near the former Youghal Train Station. The coastal
promenade is located in a 10% AEP flood extent zone; however the presence of a sea wall
and embankment currently protects the railway from coastal flooding.
While no additional mapping is available from the CFRAM studies, this does not mean that
there is no risk of flooding at other locations along the route. The CFRAM studies focused on
population centres where the impact of flooding is greatest. The proposed scheme runs
mostly throughout a rural area and no mapping was produced.



3.8         Cork County Council County Development Plan
The Cork County Council Development Plan 2014 outlines flooding objectives to be applied
in the preparation of future town development plans and in the assessment of planning
applications, making reference to ‘The Planning System and Flood Risk Management –
Guidelines for Planning Authorities (DOEHLG 2009)’. The document does not reference any
specific flood risk details along the proposed route between Midleton and Youghal.
The main objectives include:
         Avoid development in areas at risk of flooding
         Where development within flood risk areas is unavoidable, employ flood risk
          management based on avoidance, reduction and mitigation of risk
For more information about the Cork County Development Plan, all documents can be
accessed at http://www.corkcocodevplan.com/. The County Development Plan does not
include flood maps.



3.9         Ordnance Survey Historic Mapping
Historic mapping for the area was assessed for evidence of historical flooding incidents
along the proposed greenway. The historic maps assessed were the pre-1900’s 25inch
(Figure 20) and 6inch mapping (http://map.geohive.ie/). The historical mapping identifies the
area north and south of the railway line through Ballyvergan Bog as ‘liable to floods’, as
shown in Figure 21.


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Midleton to Youghal Greenway Flood Risk Assessment                                    Cork County Council




                                    Midleton-Youghal Railway




Figure 20. 25inch Historic Map




                                                                Midleton-Youghal Railway


                                              Ballyvergan Bog




Figure 21. 6inch Historic Map at Ballyvergan Bog

Despite the railway running through the Ballyvergan Bog and the area being liable to
flooding, Figure 21 shows that there are noticeable clear cut drainage channels either side of
the railway tracks. This suggests that measures were in place to drain the railway line and
mitigate flooding.

3.10        Screening Assessment Conclusion
The possible flooding mechanisms in consideration of the proposed greenway are
summarised in Table 2 below.
The purpose of this screening assessment was to identify whether a potential risk of flooding
exists and to what extent along the proposed greenway. This assessment is based on the
collation and analysis of existing current information, historical information and data which
may indicate the level or extent of any flood risk.




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Table 2. Possible Flood Mechanisms – Proposed Greenway

Source of Flooding                   Significant?    Comment / Reason
Tidal / Coastal                      Yes             Site is within a defended coastal area. Site has mitigation
                                                     efforts against coastal flooding. Historical breach identified in
                                                     coastal defences.
Fluvial                              Yes             Flooding is likely to occur from multiple fluvial flows.
Pluvial (Urban Drainage)             No              The existing site is a brownfield site. There are no records and
                                                     no known instances of failure of the associated drainage
                                                     systems.
Pluvial (Overland Flow)              Yes             Flooding is likely to occur from overland flow.
Groundwater                          No              There are springs and groundwater discharges recorded in the
                                                     immediate vicinity of the site, but no recorded flood risk.


In consideration of the data sources assess, this flood risk assessment is required to
proceed to ‘Stage 2 - Initial flood risk assessment’. The screening assessment shows that
there is a potential flooding risk to the proposed site.




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4.          STAGE 2 – INITIAL FLOOD ASSESSMENT
The proposed greenway is shown to be located within a Flood Zone. In accordance with
‘The Planning System and Flood Risk Management – Guidelines for Planning Authorities
(DOEHLG 2009)’, there are three flood zones designated in the consideration of flood risk to
a particular site.

4.1         Context
The three flood zones are described in Table 3 below.
Table 3. Flood Zone Description

Flood Zone                           Description
Flood Zone A                         Where the probability of flooding from watercourses is the highest (greater
                                     than 1% or 1 in 100 year for watercourse flooding or 0.5% or 1 in 200 for
                                     coastal flooding)
Flood Zone B                         Where the probability of flooding from watercourses is moderate (between
                                     0.1% or 1 in 1000 year and 1% or 1 in 100 year for watercourse flooding and
                                     between 0.1% or 1 in 1000 year and 0.5% or 1 in 200 for coastal flooding)
Flood Zone C                         Where the probability of flooding from watercourses and the sea is low or
                                     negligible (less than 0.1% or 1 in 1000 year for both watercourse and coastal
                                     flooding). Flood Zone C covers all areas which are not in Zones A or B.


The planning implications for each of the flood zones are:
Zone A - High probability of flooding. Most types of development would be considered
inappropriate in this zone. Development in this zone should be avoided and/or only
considered in exceptional circumstances, such as in city and town centres, or in the case of
essential infrastructure that cannot be located elsewhere, and where the Justification Test
has been applied. Only water-compatible development, such as docks and marinas,
dockside activities that require a waterside location, amenity open space, outdoor sports and
recreation, would be considered appropriate in this zone.
Zone B - Moderate probability of flooding. Highly vulnerable development, such as hospitals,
residential care homes, Garda, fire and ambulance stations, dwelling houses and primary
strategic transport and utilities infrastructure, would generally be considered inappropriate in
this zone, unless the requirements of the Justification Test can be met. Less vulnerable
development, such as retail, commercial and industrial uses, sites used for short-let for
caravans and camping and secondary strategic transport and utilities infrastructure, and
water-compatible development might be considered appropriate in this zone. In general
however, less vulnerable development should only be considered in this zone if adequate
lands or sites are not available in Zone C and subject to a flood risk assessment to the
appropriate level of detail to demonstrate that flood risk to and from the development can or
will adequately be managed.
Zone C - Low probability of flooding. Development in this zone is appropriate from a flood
risk perspective (subject to assessment of flood hazard from sources other than rivers and
the coast) but would need to meet the normal range of other proper planning and
sustainable development considerations.
In consideration of the above guidelines, the 1% AEP flood event is to be taken into account
in order to assess whether which flood zone the site is located within.




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4.2         Determination of Flood Zone

4.2.1       Coastal Flooding

The PFRA and ICPSS mapping shows a low resolution representation of a 0.5% AEP
coastal flooding event occurring throughout the section of proposed greenway approaching
Youghal town. Further investigation into this flooding along the proposed route shows that it
is within an area identified as defended by coastal protection in the CFRAM models. It can
be concluded that the historic flooding event in 2004 was a one-off incident and the recent
CFRAM study identifies that the site is not in an area at risk from coastal flooding. The area
can therefore be considered to be within Flood Zone ‘C’ from a coastal flood risk
perspective.

4.2.2       Pluvial Flooding

The PFRA Map indicates that some sections of the proposed greenway may be exposed to
pluvial flooding during a 1% AEP flood event. No additional information is available from the
CFRAM study, and is therefore identified as within Flood Zone ‘A’.

4.2.3       Fluvial Flooding

The PFRA Map indicates that some sections of the proposed greenway may be exposed to
fluvial flooding during a 1% AEP flood event. The CFRAM study shows that there is a flood
risk in Killeagh where the proposed greenway passes over the Dissour River at the
Moanlahan Viaduct. Further investigation found that there is a large bridge structure at this
location and that the topographical survey has not recorded this.
Based on the bankside levels recorded in the topographical survey and visual inspection of
the height of the bridge, it can be assumed that the pathway over the Dissour River is well
above flood levels and therefore at a reduced risk of flooding. No additional information is
available from the CFRAM study relating to other flood risks along the greenway, and is
therefore identified as within Flood Zone ‘A’.

4.2.4       Determination of Flood Zone – Findings

The proposed greenway has been determined to fall within Flood Zone ‘A’ as outlined in
Sections 4.2, 4.2.2 and 4.2.3 above.

4.3         Justification Test
The requirement for a justification test was reviewed for this study to determine whether the
proposed greenway would be considered acceptable in terms of flood risk. The results of
the flood risk assessment noted that the works will be located within Flood Zone A.
The requirement for a Justification Test is determined based on the type of development and
flood zone designation as indicated in Table 4.
Table 4. Justification Test Matrix

                                                Flood Zone A           Flood Zone B           Flood Zone C
 Highly Vulnerable Development                Justification Test      Justification Test       Appropriate
  Less Vulnerable Development                 Justification Test        Appropriate            Appropriate
 Water-Compatible Development                    Appropriate            Appropriate            Appropriate
Source: The Planning System and Flood Risk Management - Guidelines for Planning Authorities




Prepared for: Cork County Council                                                                            AECOM
                                                                                                                 17
Midleton to Youghal Greenway Flood Risk Assessment                             Cork County Council




‘The Planning System and Flood Risk Management – Guidelines for Planning’ indicate that
this type of proposed development (pedestrian/cycle pathway) is considered to be a water-
compatible development and therefore its construction within Flood Zone ‘A’ is acceptable.
The Stage 1 analysis of the proposed pathway identified several sections of the path at risk
of flooding from different sources. The Stage 2 analysis of the risks along the proposed
greenway has categorised the site to be within Flood Zone ‘A’. The greenway can be
identified as a ‘Water-Compatible Development’ suggesting that there is scope for sections
of the pathway to be submerged during flood events as there is minimal risk to the built
infrastructure associated with the pathway. There remains a risk to users of the pathway;
however this should be mitigated against as much as possible.

4.4         Mitigation Measures
Whilst not explicitly applicable to Ireland, Sustrans (a UK charity promoting walking, cycling
and the use of greenways, https://www.sustrans.org.uk/) acknowledges that sections of
greenways may be completely inundated during flood events.
It is therefore recommended that the sections of pathway at risk of flooding should provide
users with warnings well in advance, at a point where they are able to exit the path safely
and take an alternative route. Pathway design should identify a sufficient level at which
sections of the pathway should be maintained to prevent islands forming during a flood
event. This will allow for sections to be fully inundated during a flood event.




Prepared for: Cork County Council                                                          AECOM
                                                                                               18
Midleton to Youghal Greenway Flood Risk Assessment                                   Cork County Council




5.          CONCLUSIONS AND RECOMMENDATIONS
AECOM was appointed to undertake a site-specific Flood Risk Assessment (FRA) to support
the planning application for the proposed Midleton to Youghal Greenway along the existing
route of the disused railway line. It is understood that the proposed works will include the
following:
     -    Provision of car parking facilities and approximately 630m of new pathway on council
          lands to the north of Midleton station, connecting into the existing disused railway line
     -    Proposed car parking adjoining the former station at Mogeely
     -    Restoration of existing associated infrastructure (bridges and culverts)
     -    General vegetation clearance
     -    Construction of an appropriate pathway surface for the greenway along the entire
          route.
It is assumed that there will be no additional built structures along this route as part of this
project other than those that improve drainage associated with the proposal. Any works to
culverts or watercourses are likely to require Section 50 approval from OPW prior to
commencement of works.
The information available was deemed to be sufficient to assess the potential flood risk to
the proposed greenway and also the impact that the proposed greenway may have on the
hydrologic regime of the surrounding environment. Sections of the proposed greenway will
be located within Flood Zone ‘A’.
The proposed greenway is defined as a ‘Water-Compatible Development’ in accordance with
‘The Planning System and Flood Risk Management – Guidelines for Planning’ and therefore
its construction within Flood Zone ‘A’ is acceptable. It is expected that the pathway may be
inundated in part during a flood event. This is acceptable providing pathway design takes
this into consideration and the risks are adequately mitigated.
The following mitigation measures should be in put in place to mitigate the risk of flooding to
the users of the greenway:
     Adequate signage should be used to alert pathway users of the flooding risk
     Alternative exit and entry points to the greenway to be provided specifically around
      known flood risk sections
     Greenway design to consider maintaining a sufficient level to prevent islands occurring
      leading to potential entrapment of users.
The flood risk assessment concludes the development of the greenway can be inundated
during a flood event. This will cause disruption to users of the pathway; however measures
should be taken to make this safe to the public.




Prepared for: Cork County Council                                                                AECOM
                                                                                                     19
Midleton to Youghal Greenway Flood Risk Assessment   Cork County Council




Appendix A Photographs




Prepared for: Cork County Council                                AECOM
                                                                      I
Midleton to Youghal Greenway Flood Risk Assessment                                 Appendix A - Photographs




                                    Point 1 – To Youghal   Point 1 – To Midleton




Prepared for Cork County Council                                                                    AECOM
                                                                                                        A1
Midleton to Youghal Greenway Flood Risk Assessment                                 Appendix A - Photographs




                                    Point 2 – To Youghal   Point 2 – To Midleton




                                    Point 3 – To Youghal   Point 3 – To Midleton




Prepared for Cork County Council                                                                    AECOM
                                                                                                        A2
Midleton to Youghal Greenway Flood Risk Assessment                                 Appendix A - Photographs




                                    Point 4 – To Youghal   Point 5 – To Midleton




                                    Point 6 – To Youghal   Point 6 – To Midleton




Prepared for Cork County Council                                                                    AECOM
                                                                                                        A3
Midleton to Youghal Greenway Flood Risk Assessment                                           Appendix A - Photographs




                                      Point 7 – To Youghal        Point 7 – To Midleton




                                   Point 8 – Railway Sideview   Point 8 – Railway Sideview




Prepared for Cork County Council                                                                              AECOM
                                                                                                                  A4
Midleton to Youghal Greenway Flood Risk Assessment                                  Appendix A - Photographs




                                    Point 9 – To Youghal   Point 9 – To Midleton




                                   Point 10 – To Youghal   Point 10 – To Midleton




Prepared for Cork County Council                                                                     AECOM
                                                                                                         A5
Midleton to Youghal Greenway Flood Risk Assessment   Cork County Council




Appendix B Drawings




Prepared for: Cork County Council                                AECOM
                                                                     II
Rev. Date                   By               Description


                              CORK COUNTY COUNCIL
                              Divisional Services, South
                                                                                                     M. Manning
                                                                                                     Director of Services,
                                                                                                     Divisional Services South



  Project:
                   Midleton - Youghal Greenway


  Title:
                   Location Map


Designed: DC                    Checked:                          Scales: NTS                                   Drawing No:

Drawn:     jw                    Approved:                                    Date:                                          GW-001
Surveyed: jw cs                                                                           July 2014
 File Path: \\Cohall2\divisional_services_south\Recreation_Amenity\Greenways\Midleton Youghal Greenway\Dwg\Mid-YgLMap.dwg
                                                                                                                       Status:      Rev: b
Midleton to Youghal Greenway Flood Risk Assessment   Cork County Council




Appendix C Flood Maps




Prepared for: Cork County Council                                AECOM
                                                                     III
© Government of Ireland
                                                                                                                                                 Location Plan :
        Osi permit number EN-002-1011




    ¯


                                                                                                                                                 Legend:
                                                                                                                                                 Flood Extents
                                                                                                                                                             Fluvial - Indicative 1% AEP (100-yr) Event

                                                                                              CARRIGTWOHILL                                                  Fluvial - Extreme Event


                                                                                        j
                                                                                        k                              MIDDLETON& BALLYNACORRA               Coastal - Indicative 0.5% AEP (200-yr) Event

                                              No Fluvial Data Available For Area                                   j
                                                                                                                   k                                         Coastal - Extreme Event



j
k                                                                                                                                                            Pluvial - Indicative 1% AEP (100-yr) Event
                                                                                                                                                             Pluvial - Extreme Event

                                                             No Fluvial Data Available For Area
                                                                                                                                                             Groundwater Flood Extents


                                                                                                                                                               Lakes / Turloughs

                                                                                                                                                 PFRA Outcomes

                                                                                                                                                   k
                                                                                                                                                   j            Probable Area for Further Assesment



                                                                                                                                                   j
                                                                                                                                                   k            Possible Area for Further Assesment

                                                                                                                                                 Important User Note:

                                                                                                                                                 The flood extents shown on these maps are based on broad-
                                                                                                                                                 scale simple analysis and may not be accurate for a specific
                                                                                                                                                 location. Information on the purpose, development and
                                                                                                                                                 limitations of these maps is available in the relevant reports
                                                                                                                                                 (see www.cfram.ie). Users should seek professional advice if
                                                                                                                                                 they intend to rely on the maps in any way.

                                                                                                                                                 If you believe that the maps are inaccurate in some way please
                                                                                                                                                 forward full details by contacting the OPW (refer to PFRA
                                                                                                                                                 Information leaflets or ‘Have Your Say’ on www.cfram.ie).




                                                                                                                                                 Office of Public Works
                                                                                                                                                 Jonathon Swift Street
                                                                                                                                                 Trim
                                                                                                                                                 Co Meath
                                                                                                                                                 Ireland


                                                                                                                                                 Project :
                                                                                                                                                 PRELIMINARY FLOOD RISK ASSESMENT (PFRA)
                                                                                                                                                 Map :
                                                                                                                                                 PFRA Indicative extents and outcomes
                                                                                                                                                 - Draft for Consultation
                                                                                                                                                 Figure By :      PJW                  Date : July2011
                                                                                                                                                 Checked By : MA                       Date : July 2011

                                                                                                                                                 Figure No. :                                       Revision
                                                                                                                                                 2019 / MAP / 39            /A                            0
                                                                                                                                                 Drawing Scale : 1:50,000          Plot Scale : 1:1 @ A3


    0.5 0.25    0        0.5       1    1.5     2      2.5       3      3.5      4      4.5       5
                                                                                                      Kilometers
© Government of Ireland
                                                                                                                                               Location Plan :
    Osi permit number EN-002-1011




¯                                         No Fluvial Data Available For Area
                                                                                              No Fluvial Data Available For Area

                                                             MOGEELY                                                         KILLEAGH
                                                       j
                                                       k                                                                j
                                                                                                                        k
                                                                                                          No Fluvial Data Available For Area




                                                                                                                                               Legend:
                                                                                                                                               Flood Extents
                                                                                                                                                           Fluvial - Indicative 1% AEP (100-yr) Event

                                                                                                                                                           Fluvial - Extreme Event
                                                       CASTLEMARTYR
                                                  j
                                                  k                                                                                                        Coastal - Indicative 0.5% AEP (200-yr) Event
                                                                                                                                                           Coastal - Extreme Event


                                                                             LADYSBRIDGE                                                                   Pluvial - Indicative 1% AEP (100-yr) Event

                                                                      j
                                                                      k                                                                                    Pluvial - Extreme Event


                                                                                                                                                           Groundwater Flood Extents


                                                                                                                                                             Lakes / Turloughs

                                                                                                                                               PFRA Outcomes

                                                                                                                                                 k
                                                                                                                                                 j            Probable Area for Further Assesment



                                                                                                                                                 j
                                                                                                                                                 k            Possible Area for Further Assesment

                                                                                                                                               Important User Note:

                                                                                                                                               The flood extents shown on these maps are based on broad-
                                                                                                                                               scale simple analysis and may not be accurate for a specific
                                                                                                                                               location. Information on the purpose, development and
                                                                                                                                               limitations of these maps is available in the relevant reports
                                                                                                                                               (see www.cfram.ie). Users should seek professional advice if
                                                                                                                                               they intend to rely on the maps in any way.

                                                                                                                                               If you believe that the maps are inaccurate in some way please
                                                                                                                                               forward full details by contacting the OPW (refer to PFRA
                                                                                                                                               Information leaflets or ‘Have Your Say’ on www.cfram.ie).




                                                                                                                                               Office of Public Works
                                                                                                                                               Jonathon Swift Street
                                                                                                                                               Trim
                                                                                                                                               Co Meath
                                                                                                                                               Ireland


                                                                                                                                               Project :
                                                                                                                                               PRELIMINARY FLOOD RISK ASSESMENT (PFRA)
                                                                                                                                               Map :
                                                                                                                                               PFRA Indicative extents and outcomes
                                                                                                                                               - Draft for Consultation
                                                                                                                                               Figure By :      PJW                  Date : July2011
                                                                                                                                               Checked By : MA                       Date : July 2011

                                                                                                                                               Figure No. :                                       Revision
                                                                                                                                               2019 / MAP / 40            /A                            0
                                                                                                                                               Drawing Scale : 1:50,000          Plot Scale : 1:1 @ A3


0.5 0.25    0        0.5       1    1.5   2      2.5     3      3.5      4     4.5   5
                                                                                         Kilometers
© Government of Ireland
                                                                                         Location Plan :
    Osi permit number EN-002-1011




¯


                                                                                         Legend:
                                                                                         Flood Extents
                                                                                                     Fluvial - Indicative 1% AEP (100-yr) Event

                                                                                                     Fluvial - Extreme Event


                                                                                                     Coastal - Indicative 0.5% AEP (200-yr) Event
                                                                                                     Coastal - Extreme Event


                                                                                                     Pluvial - Indicative 1% AEP (100-yr) Event
                                                                                                     Pluvial - Extreme Event


                                                                                                     Groundwater Flood Extents


                                                                                                       Lakes / Turloughs

                                                                                         PFRA Outcomes

                                                                                           k
                                                                                           j            Probable Area for Further Assesment



                                                                                           j
                                                                                           k            Possible Area for Further Assesment

                                                                                         Important User Note:

                                                                                         The flood extents shown on these maps are based on broad-
                                                                                         scale simple analysis and may not be accurate for a specific
                                                                                         location. Information on the purpose, development and
                                                                                         limitations of these maps is available in the relevant reports
                                                                                         (see www.cfram.ie). Users should seek professional advice if
                                                                                         they intend to rely on the maps in any way.

                                                                                         If you believe that the maps are inaccurate in some way please
                                                                                         forward full details by contacting the OPW (refer to PFRA
                                                                                         Information leaflets or ‘Have Your Say’ on www.cfram.ie).




                                                                                         Office of Public Works
                                                                                         Jonathon Swift Street
                                                                                         Trim
                                                                                         Co Meath
                                                                                         Ireland


                                                                                         Project :
                                                                                         PRELIMINARY FLOOD RISK ASSESMENT (PFRA)
                                                                                         Map :
                                                                                         PFRA Indicative extents and outcomes
                                                                                         - Draft for Consultation
                                                                                         Figure By :      PJW                  Date : July2011
                                                                                         Checked By : MA                       Date : July 2011

                                                                                         Figure No. :                                       Revision
                                                                                         2019 / MAP / 41            /A                            0
                                                                                         Drawing Scale : 1:50,000          Plot Scale : 1:1 @ A3


0.5 0.25    0        0.5       1    1.5   2   2.5   3   3.5   4   4.5   5
                                                                            Kilometers
Location Plan :

 © Government of Ireland
 Osi permit number EN-002-1006




±


                                                                                                                              DEPTH MAP 0.5%AEP
                                                                                                                            Legend:
                                                                                                                            Depth Grid
                                                                                                                                    0 -0.25 m
                                                                                                                                    0.25 - 0.50 m
                                                                                                                                    0.50 - 1 m
                                                                                                                                    1.00 - 1.50 m
                                                                                                                                    1.50 - 2.00 m
                                                                                                                                    > 2.00 m
                                                                                                                                    Inland DTM Extent

                                                                                                                                    High Water Mark (HWM)

                                                                                                                                    Node Point

                                                                                                                            Point 34 Node Label (refer to table)




                                                                                                                            USER NOTE :

                                                                                                                            USERS OF THESE MAPS SHOULD REFER TO THE DETAILED
                                                                                                                            DESCRIPTION OF THEIR DERIVATION, LIMITATIONS IN
                                                                                                                            ACCURACY AND GUIDANCE AND CONDITIONS OF USE
                                                                                                                            PROVIDED AT THE FRONT OF THIS BOUND VOLUME. IF THIS
                                                                                                                            MAP DOES NOT FORM PART OF A BOUND VOLUME, IT
                                                                                                                            SHOULD NOT BE USED FOR ANY PURPOSE.




                                                                                                                            Elmwood House                              Office of Public Works
                                                                                                                            74 Boucher Road                            17-19 Lower Hatch Street
                                                                                                                            Belfast                                    Dublin 2
                                                                                                                            BT 12 6RZ                                  Ireland
                                                                                                                            Northern Ireland



                                                                                                                            Project :
                                                                                                                            IRISH COASTAL PROTECTION STRATEGY
                                                                                                                            STUDY - PHASE III
                                                                                                                            Map :
                                                                                                                            SOUTH COAST FLOOD DEPTH MAP
                                                                                                                            Map Type :        DEPTH
                                                                                                                            Return Period 0.5% AEP EVENT
                                                                                                                            Source :          TIDAL FLOODING
                                                                                                                            Map area :        RURAL AREA
                                                                                                                            Scenario :        CURRENT
                                                                                                                            Figure By :       PJW                     Date : May 2009
                                                                      S_31
                                                                                          Water Level (mOD Malin) per AEP
                                                                                                                            Checked By : JMC                          Date : May 2009
                                                                  !          Node Label   WL 10%      WL 0.5% WL 0.1%
                                                                                S_31         2.36        2.65       2.81    Figure No. :                                           Revision

                                                                                                                             S / RA / DEP / 26                                          0
                                                                                                                            Drawing Scale : 1:25,000               Plot Scale : 1:1 @ A3


0.5     0.25       0             0.5   1   1.5   2
                                                     Kilometers
Location Plan :

 © Government of Ireland




                           !
 Osi permit number EN-002-1010
                   ! !




                   !
                       !


           !       !

               !




±


                                                                                                                               EXTENT MAP
                                                                                                                              Legend:
                                                                                                                                           0.5% AEP FLOOD EXTENT
                                                                                                                                           (1 in 200 chance in any given year)

                                                                                                                                           0.1% AEP FLOOD EXTENT
                                                                                                                                           (1 in 1000 chance in any given year)

                                                                                                                                           Very High Confidence (0.1% AEP)

                                                                                                                                           High Confidence (0.1% AEP)

                                                                                                                                           Medium Confidence (0.1% AEP)

                                                                                                                                           Low Confidence (0.1% AEP)

                                                                                                                                           Very Low Confidence (0.1% AEP)

                                                                                                                                           Very High Confidence (0.5% AEP)

                                                                                                                                           High Confidence (0.5% AEP)

                                                                                                                                           Medium Confidence (0.5% AEP)

                                                                                                                                           Low Confidence (0.5% AEP)

                                                                                                                                           Very Low Confidence (0.5% AEP)

                                                                                                                                           High Water Mark (HWM)

                                                                                                                                           Node Point

                                                                                                                              Point 34     Node Label (refer to table)


                                                                                                                              USER NOTE :

                                                                                                                              USERS OF THESE MAPS SHOULD REFER TO THE DETAILED
                                                                                                                              DESCRIPTION OF THEIR DERIVATION, LIMITATIONS IN
                                                                                                                              ACCURACY AND GUIDANCE AND CONDITIONS OF USE
                                                                                                                              PROVIDED AT THE FRONT OF THIS BOUND VOLUME. IF THIS
                                                                                                                              MAP DOES NOT FORM PART OF A BOUND VOLUME, IT
                                                                                                                              SHOULD NOT BE USED FOR ANY PURPOSE.




                                                                                                                              Elmwood House                              Office of Public Works
                                                                                                                              74 Boucher Road                            17-19 Lower Hatch Street
                                                                                                                              Belfast                                    Dublin 2
                                                                                                                              BT 12 6RZ                                  Ireland
                                                                                                                              Northern Ireland



                                                                                                                              Project :
                                                                                                                              IRISH COASTAL PROTECTION STRATEGY
                                                                                                                              STUDY - PHASE III
                                                                                                                              Map :
                                                                                                                              SOUTH COAST FLOOD EXTENT MAP
                                                                                                                              Map Type :        FLOOD EXTENT
                                                                                                                              Source :          TIDAL FLOODING
                                                                                                                              Map area :        RURAL AREA
                                                                                                                              Scenario :        CURRENT
                                                                                                                              Figure By :       PJW                      Date : FEB 2010
                                                                                                                              Checked By : JMC                           Date : FEB 2010
                                                                          S_31
                                                                      !                     Water Level (mOD Malin) per AEP
                                                                                                                              Figure No. :                                           Revision
                                                                                 Node Label WL 10%      WL 0.5% WL0.1%
                                                                                    S_31       2.36        2.65       2.81    S / RA / EXT / 26                                            1
                                                                                                                              Drawing Scale : 1:25,000               Plot Scale : 1:1 @ A3


0.5     0.25                   0   0.5   1   1.5   2   2.5
                                                         Kilometers
209400.000000         209600.000000         209800.000000              210000.000000   210200.000000      210400.000000           210600.000000           210800.000000
                                                                                                                                                                                                       Location Plan:
77000.000000




                                                                                                                                                                                        77000.000000
                                                                                                                                                                                                        Legend:
76800.000000




                                                                                                                                                                                        76800.000000
                                                                                                                                                                                                          !
                                                                                                                                                                                                          (     Model Nodes
                                                                                                                                                                                                                Modelled River Centreline
                                                                                                                                                                                                                AFA Boundary
                                                                                                                                                                                                                10% AEP Flood Extent
                                                                                                                                                                                                                0.5% AEP Flood Extent
                                                                                                                                                                                                                0.1% AEP Flood Extent
                                                                                                                                                                                                                Flood Defence - Embankment
                                                                                                                                                                                                                Defended Area
76600.000000




                                                                                                                                                                                        76600.000000
                                                                                                                                                                                                        IMPORTANT USER NOTICE: THE VIEWER OF THIS MAP
                                                                                                                                                                                                        SHOULD REFER TO THE DISCLAIMER, GUIDANCE NOTES
                                                                                                                                                                                                        AND CONDITIONS OF USE THAT ACCOMPANY THIS MAP.
                                                                                                                                                                                                                                                !
                                                                                                                                                                                                                                                (
                                                                                                                                                                                                        THIS AREA IS AT RISK FROM FLUVIAL AND TIDAL
76400.000000




                                                                                                                                                                                        76400.000000
                                                                                                                                                                                                        FLOODING. PLEASE REFER TO THE CORRESPONDING
                                                                                                                                                                                                        FLUVIAL/TIDAL MAP.
76200.000000




                                                                                                                                                                                        76200.000000
                                                                                                                                                                                                        Office of Public Works               Mott MacDonald Ireland
                                                                                                                                                                                                        Jonathan Swift Street                5 Eastgate Avenue
                                                                                                                                                                                                        Trim Co. Meath                       Little Island
                                                                                                                                                                                                                                             Co. Cork
                                                                                                                                                                                                       Project:
                                                                                                                                                                                                       South Western CFRAM Study
                                                                                                                                                                                                       Map:
                                                                                                                                                                                                       Youghal - Flood Extent
76000.000000




                                                                                                                                                                                        76000.000000
                                                                                                                                                                                                       Map type:            Flood Extent
                                                                                                                                                                                                       Source:              Tidal Flooding
                                                                                                                                                                                                       Map area:            Urban Area
                                                                                                                                                                                                       Scenario:            Current

                                                                                                                                                                                                       Drawn by:       Lee Cutting             Date: June 2016
                                                                                                                                                                                                       Checked by: Marianne Piggott            Date: June 2016
                                                                                                                                                                                                       Approved by: Christian Hetmank          Date: June 2016
                                                                                                                                                                                                       Map No.: MMD/296235/E/DR/I18HYL/EXCCDEXC/F/Sht006
        209400.000000         209600.000000         209800.000000              210000.000000   210200.000000      210400.000000           210600.000000           210800.000000
                                                                                                                                                                                                       Sheet:      6 of 7                           Revision:   F
               0        100   200             300   400             500
                                                                      Meters    [                              © Ordnance Survey Ireland. All rights reserved. License number EN-002-1016              Drawing Scale:         1:5,000        Plot Scale: 1:1@A3
208400 .000000         208600 .000000         208800 .000000              209000 .000000   209200 .000000      209400 .000000           209600 .000000          209800 .000000
                                                                                                                                                                                                               Location Plan:
76200.000000




                                                                                                                                                                                                76200.000000
76000.000000




                                                                                                                                                                                                76000.000000
                                                                                                                                                                                                                Legend:

                                                                                                                                                                                                                  (
                                                                                                                                                                                                                  !      Model Nodes
                                                                                                                                                                                                                         Modelled River Centreline
                                                                                                                                                                                                                         AFA Boundary
                                                                                                                                                                                                                         10% AEP Flood Extent
                                                                                                                                                                                                                         0.5% AEP Flood Extent
75800.000000




                                                                                                                                                                                                75800.000000
                                                                                                                                                                                                                         0.1% AEP Flood Extent
                                                                                                                                                                                                                         Flood Defence - Embankment
                                                                                                                                                                                                                         Defended Area




                                                                                                                                                                                                                IMPORTANT USER NOTICE: THE VIEWER OF THIS MAP
75600.000000




                                                                                                                                                                                                75600.000000
                                                                                                                                                                                                                SHOULD REFER TO THE DISCLAIMER, GUIDANCE NOTES
                                                                                                                                                                                                                AND CONDITIONS OF USE THAT ACCOMPANY THIS MAP.


                                                                                                                                                                                                                THIS AREA IS AT RISK FROM FLUVIAL AND TIDAL
                                                                                                                                                                                                                FLOODING. PLEASE REFER TO THE CORRESPONDING
                                                                                                                                                                                                                FLUVIAL/TIDAL MAP.
75400.000000




                                                                                                                                                                                                75400.000000
                                                                                                                                                                                                                Office of Public Works               Mott MacDonald Ireland
                                                                                                                                                                                                                Jonathan Swift Street                5 Eastgate Avenue
                                                                                                                                                                                                                Trim Co. Meath                       Little Island
                                                                                                                                                                                                                                                     Co. Cork
75200.000000




                                                                                                                                                                                                75200.000000
                                                                                                                                                                                                               Project:
                                                                                                                                                                                                               South Western CFRAM Study
                                                                                                                                                                                                               Map:
                                                                                                                                                                                                               Youghal - Flood Extent
                                                                                                                                                                                                               Map type:            Flood Extent
                                                                                                                                                                                                               Source:              Tidal Flooding
                                                                                                                                                                                                               Map area:            Urban Area
                                                                                                                                                                                                               Scenario:            Current
75000.000000




                                                                                                                                                                                                75000.000000
                                                                                                                                                                                                               Drawn by:       Lee Cutting             Date: June 2016
                                                                                                                                                                                                               Checked by: Marianne Piggott            Date: June 2016
                                                                                                                                                                                                               Approved by: Christian Hetmank          Date: June 2016
                                                                                                                                                                                                               Map No.: MMD/296235/E/DR/I18HYL/EXCCDEXC/F/Sht007
           208400 .000000         208600 .000000         208800 .000000              209000 .000000   209200 .000000      209400 .000000           209600 .000000          209800 .000000
                                                                                                                                                                                                               Sheet:      7 of 7                           Revision:   F
               0            100   200              300   400              500
                                                                            Meters   [                                 © Ordnance Survey Ireland. All rights reserved. License number EN-002-1016              Drawing Scale:         1:5,000        Plot Scale: 1:1@A3
195400.000000          195600.000000                  195800.000000           196000.000000                 196200.000000              196400.000000           196600.000000            196800.000000
74800.000000




                                                                                                                                                                                                                      74800.000000
                                                                                                                                                                                                                                      Legend:

                                                                                                                                                                                                                                        !
                                                                                                                                                                                                                                        (     Model Nodes

                                                                                                                                                                                                                                              Flood Defence - Embankment
                                                                                                        19KILT00304H
                                                                                                                                                                                                                                              Modelled River Centreline
                                                                                                      !
                                                                                                      (
                                                                                                                                                                                                                                              Defended Area
74600.000000




                                                                                                                                                                                                                      74600.000000
                                                                                                                                                                                                                                              AFA Boundary
                                                                                                                                                                                                                                              10% AEP Flood Extent
                                                                                                                                                                                                                                              1% AEP Flood Extent
                                                                                                                                                                                                                                              0.1% AEP Flood Extent
74400.000000




                                                                                                                                                                                                                      74400.000000
                                                                                                                                                                                                                                      IMPORTANT USER NOTICE: THE VIEWER OF THIS MAP
                                                                                                                                                                                                                                      SHOULD REFER TO THE DISCLAIMER, GUIDANCE NOTES
                                                                                                                                                                                                                                      AND CONDITIONS OF USE THAT ACCOMPANY THIS MAP.
74200.000000




                                                                                                                                                                                                                      74200.000000
                                                                                                                  19KILT00255H
                                                                                                                  !
                                                                                                                  (
                                                                                                             19KILR00179H
                                                                                                           !
                                                                                                           (
                                                                                                                                                                                                                                      Office of Public Works                 Mott MacDonald Ireland
                                                                                                                                                                                                                                      Jonathan Swift Street                  5 Eastgate Avenue
                                                                                                                                                                                                                                      Trim Co. Meath                         Little Island
74000.000000




                                                                                                                                                                                                                      74000.000000
                                                                                                                                                                                                                                                                             Co. Cork
                                                                                                                       19KILT00236H
                                                                                                                                                                                                                                     Project:
                                                                                                                       !
                                                                                                                       (                                                                                                             South Western CFRAM Study
                                                                                   19KILR00149H                                                                                                                                      Map:
                                                                                                                                                                                                                                     Castlematyr - Flood Extent
                                                                                 !
                                                                                 (
                                                                                                                                                                                                                                     Map type:            Flood Extent
                                                                                                                                                                                                                                     Source:              Fluvial Flooding
                                                                                                                                                                                                                                     Map area:            Urban Area
                                                                                                                                                                                                                                     Scenario:            Current
73800.000000




                                                                                                                                                                                                                      73800.000000
                                                                 19KILR00130A
                                                                                                                            19KILT00217H
                                                             !
                                                             (                                                                                                                                                                       Drawn by:       Lee Cutting              Date: June 2016
                                                                                                                           !
                                                                                                                           (                                                                                                         Checked by: Marianne Piggott              Date: June 2016
                                                                                                                                                                                                                                     Approved by: Christian Hetmank            Date: June 2016
                                                                                                                                                                                                                                     Map No.: MMD/296235/E/DR/I19HCR/EXFCDEXF/F/Sht001
                    195400.000000          195600.000000                  195800.000000           196000.000000                 196200.000000              196400.000000           196600.000000            196800.000000
                                                                                                                                                                                                                                     Sheet:      1 of 3                             Revision:   F
               0   100              200   300              400          500

                                      !
                                      (
                                                                          Meters
                                                                                          [                                                © Ordnance Survey Ireland. All rights reserved. License number EN-002-1016                Drawing Scale:         1:5,000          Plot Scale: 1:1@A3
200000.000000         200200.000000          200400.000000              200600.000000       200800.000000                  201000.000000    201200.000000
77200.000000




                                                                                                                                                                                                77200.000000
                                           19EAGH00379H
                                          !
                                          (




                                                                                                                                                                                                                Legend:
77000.000000




                                                                                                                                                                                                77000.000000
                                                                                                                                                                                                                  !
                                                                                                                                                                                                                  (     Model Nodes

                                                                                                                                                                                                                        Flood Defence - Embankment

                                                       19EAGH00350H                                                                                                                                                     Modelled River Centreline
                                                     !
                                                     (                                                                                                                                                                  Defended Area
                                                                                                                                                                                                                        AFA Boundary
                                                                                                                                                                                                                        10% AEP Flood Extent
                                                                                                                                                                                                                        1% AEP Flood Extent
76800.000000




                                                                                                                                                                                                76800.000000
                                                                                                                                                                                                                        0.1% AEP Flood Extent



                                                                        19EAGH00320H
                                                                       !
                                                                       (
                                                                                                                                                                                                                IMPORTANT USER NOTICE: THE VIEWER OF THIS MAP
                                                                                                                                                                                                                SHOULD REFER TO THE DISCLAIMER, GUIDANCE NOTES
                                                                                  19EAGH00302A
                                                                                                                                                                                                                AND CONDITIONS OF USE THAT ACCOMPANY THIS MAP.
                                                                                            !
                                                                                            (! 19EAGH00300A
                                                                                             (
76600.000000




                                                                                                                                                                                                76600.000000
76400.000000




                                                                                                                                                                                                76400.000000
                                                                                                                 19EAGH00268H
                                                                                                                 !
                                                                                                                 (
                                                                                                                                                                                                                Office of Public Works                 Mott MacDonald Ireland
                                                                                                                                                                                                                Jonathan Swift Street                  5 Eastgate Avenue
                                                                                                                                                                                                                Trim Co. Meath                         Little Island
                                                                                                                                                                                                                                                       Co. Cork
                                                                                                                                                                                                               Project:
                                                                                                                                                                                                               South Western CFRAM Study
                                                                                                                                                                                                               Map:
76200.000000




                                                                                                                                                                                                76200.000000
                                                                                                                                      19EAGH00242A                                                             Killeagh - Flood Extent
                                                                                                                                     !
                                                                                                                                     (                                                                         Map type:            Flood Extent
                                                                                                                                                                                                               Source:              Fluvial Flooding
                                                                                                                                                                                                               Map area:            Urban Area
                                                                                                                                                                                                               Scenario:            Current

                                                                                                                                                                                                               Drawn by:       Lee Cutting              Date: June 2016
                                                                                                                                     19EAGH00226H                                                              Checked by: Marianne Piggott              Date: June 2016
76000.000000




                                                                                                                                                                                                76000.000000
                                                                                                                                 !
                                                                                                                                 (                                                                             Approved by: Christian Hetmank            Date: June 2016
                                                                                                                                                                                                               Map No.: MMD/296235/E/DR/I19HKL/EXFCDEXF/F/Sht001
                         200000.000000         200200.000000          200400.000000              200600.000000       200800.000000                  201000.000000    201200.000000
                                                                                                                                                                                                               Sheet:      1 of 2                             Revision:   F
               0   100         200       300         400        500
                                                                  Meters
                                                                             [                                         © Ordnance Survey Ireland. All rights reserved. License number EN-002-1016              Drawing Scale:         1:5,000          Plot Scale: 1:1@A3
200400.000000         200600.000000         200800.000000                  201000.000000   201200.000000              201400.000000           201600.000000            201800.000000
76200.000000




                                                                                                                                                                                                              76200.000000
                                                                                19EAGH00242A
                                                                               !
                                                                               (



                                                                               19EAGH00226H
76000.000000




                                                                                                                                                                                                              76000.000000
                                                                           !
                                                                           (

                                                                                                                                                                                                                              Legend:

                                                                                                                                                                                                                                !
                                                                                                                                                                                                                                (     Model Nodes

                                                                                                                                                                                                                                      Flood Defence - Embankment
                                                                                                                                                                                                                                      Modelled River Centreline
                                                                                                                                                                                                                                      Defended Area
75800.000000




                                                                                                                                                                                                              75800.000000
                                                                                                                                                                                                                                      AFA Boundary
                                                                                                                                                                                                                                      10% AEP Flood Extent
                                                                                                                                                                                                                                      1% AEP Flood Extent
                                                                                                                                                                                                                                      0.1% AEP Flood Extent




                                                                                                                                                                                                                              FLOOD MAPPING FOR WOMANAGH CAN BE FOUND ON
                                                                                                                                                                                                                              DRAWING NO. I19MWH
75600.000000




                                                                                                                                                                                                              75600.000000
                                                                                                                              19EAGH00156H                                                                                    IMPORTANT USER NOTICE: THE VIEWER OF THIS MAP
                                                                                                                                                                                                                              SHOULD REFER TO THE DISCLAIMER, GUIDANCE NOTES
                                                                                                                              !
                                                                                                                              (                                                                                               AND CONDITIONS OF USE THAT ACCOMPANY THIS MAP.
75400.000000




                                                                                                                                                                                                              75400.000000
                                                                                                                                                                                                                              Office of Public Works                 Mott MacDonald Ireland
                                                                                                                                                                                                                              Jonathan Swift Street                  5 Eastgate Avenue
                                                                                                                                                                                                                              Trim Co. Meath                         Little Island
                                                                                                                                                                                                                                                                     Co. Cork
75200.000000




                                                                                                                                                                                                              75200.000000
                                                                                                                                                                                                                             Project:
                                                                                                                                                                                                                             South Western CFRAM Study
                                                                                                                                                                                            19EAGH00062H
                                                                                                                                                                                                          !
                                                                                                                                                                                                          (                  Map:
                                                                                                                                                                                                                             Killeagh - Flood Extent
                                                                                                                                                                                                                             Map type:            Flood Extent
                                                                                                                                                                                                                             Source:              Fluvial Flooding
                                                                                                                                                                                                                             Map area:            Urban Area
                                                                                                                                                                                                                             Scenario:            Current
75000.000000




                                                                                                                                                                                                              75000.000000
                                                                                                                                                                                                                             Drawn by:       Lee Cutting              Date: June 2016
                                                                                                                                                                                                                             Checked by: Marianne Piggott              Date: June 2016
                                                                                                                                                                                                                             Approved by: Christian Hetmank            Date: June 2016
                                                                                                                                                                                                                             Map No.: MMD/296235/E/DR/I19HKL/EXFCDEXF/F/Sht002
                   200400.000000         200600.000000         200800.000000                  201000.000000   201200.000000              201400.000000           201600.000000            201800.000000
                                                                                                                                                                                                                             Sheet:      2 of 2                             Revision:   F
               0            100    200            300    400            500
                                                                          Meters
                                                                                        [                                         © Ordnance Survey Ireland. All rights reserved. License number EN-002-1016                 Drawing Scale:         1:5,000
                                                                                                                                                                                                                                                           !
                                                                                                                                                                                                                                                           (
                                                                                                                                                                                                                                                                     Plot Scale: 1:1@A3
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