Belgard Gardens, Tallaght PROJECT NO. xxx
SITE-SPECIFIC FLOOD RISK ASSESSMENTINSERT REPORTDATE
for ATLAS GP LIMITED
PROJECT NO. A557
th 19 DECEMBER 2018
Belgard Gardens, Tallaght
SITE -SPECIFIC FLOOD RISK ASSESSMENT REPORT
for ATLAS GP LIMITED
PROJECT NO. A557 19 th DECEMBER 2018
Site-Specific Flood Risk Assessment Report
for
Belgard Gardens, Belgard Square,
Tallaght, Dublin 24.
NOTICE
This document has been produced by O’Connor Sutton Cronin & Associates for its client
Atlas GP Limited . It may not be used for any purpose other than that specified by any other person without the written permission of the authors.
DOCUMENT CONTROL & HISTORY
OCSC Job No.: Project Project Code Originator Zone Volume Level Type File Type Role Number / Status Suitability Code Revision A557 A557 OCSC XX XX RP C 0002 A1 C03
Rev. Status Authors Checked Authorised Issue Date
C03 A1 MK PR AH 19.12.2018 C02 A1 MK PR AH 12.11.2018 P04 S3 MK PR AH 25.10.2018 P03 S3 MK PR AH 28.09.2018 C01 A1 MK PR AH 18.06.2018 P02 S3 MK PR AH 01.06.2018 P01 S3 MK PR AH 01.06.2018
SITE-SPECIFIC FLOOD RISK ASSESSMENT
19 th December 2018
TABLE OF CONTENTS PAGE
1 INTRODUCTION ...... 1
1.1 Appointment...... 1
1.2 Administrative Jurisdiction ...... 1
1.3 Site Location ...... 1
1.4 Information Consulted ...... 2
2 SITE CONTEXT ...... 3
2.1 Site Area ...... 3
2.2 Site Overview and Topography ...... 3
2.3 Site Access ...... 4
2.4 Site Zoning ...... 4
2.5 Proposed Development Context ...... 4
3 LEVEL OF SERVICE ...... 6
3.1 Flood Risk & Service Level ...... 6
3.2 Climate Change ...... 6
3.3 Flood Risk Zones ...... 7
3.4 Development Vulnerability ...... 8
3.5 Development ‘Appropriateness’ ...... 9
3.6 Proposed Development ...... 10
4 FLOOD RISK AND MITIGATION MEASURES ...... 11
4.1 Historical Flooding ...... 11 4.1.1 OPW’s Historical Flood Mapping ...... 11
4.2 Fluvial Flooding ...... 11 4.2.1 Site Location ...... 11 4.2.2 Catchment Flood Risk Assessment and Management ...... 12
4.2.3 Proposed Development Context ...... 13
4.3 Tidal Flooding...... 13 4.3.1 Site Location ...... 13 4.3.2 Catchment Flood Risk and Assessment Mapping ...... 14 4.3.3 Proposed Development Context ...... 15
4.4 Pluvial Flooding ...... 15 4.4.1 Preliminary Flood Risk Assessment ...... 15 4.4.2 Proposed Development Context ...... 16
4.5 Existing Public Drainage Infrastructure ...... 16
4.6 Proposed Drainage Infrastructure ...... 17
4.7 Groundwater Flooding ...... 18
5 CONCLUSIONS AND RECOMMENDATIONS ...... 20
5.1 Flood Risk Assessment Overview ...... 20
5.2 Proposed Development Infrastructure ...... 20
5.3 Recommendations ...... 20
APPENDICES
APPENDIX A. FLOODMAPS.IE REPORT
APPENDIX B. OPW PFRA INDICATIVE EXTENTS & OUTCOMES MAP
APPENDIX C. CFRAM FLUVIAL FLOOD EXTENT MAPS
APPENDIX D. INDICATIVE PLUVIAL FLOOD EXTENT MAPPING
APPENDIX E. SOUTH DUBLIN COUNTY COUNCIL DRAINAGE MAPS
O’Connor Sutton Cronin & Associates Site-Specific Flood Risk Assessment Report Multidisciplinary Consulting Engineers Belgard Gardens, Tallaght, Dublin 24.
SITE-SPECIFIC FLOOD RISK ASSESSMENT
19 th December2018
1 INTRODUCTION 1.1 Appointment
O’Connor Sutton Cronin & Associates (OCSC) have been appointed by Atlas GP Limited ; to carry out a Site-Specific Flood Risk Assessment Report for the new- build planning application of a proposed mixed-use, regeneration development, located west of Belgard Road, Tallaght, Dublin 24.
1.2 Administrative Jurisdiction
The proposed development is located in the jurisdiction of South Dublin County Council (SDCC), and therefore the Site-Specific Flood Risk Assessment Report was carried out with reference to the following:
• South Dublin County Council Development Plan 2016 – 2022; • Strategic Flood Risk Assessment for South Dublin County Council Development Plan, 2016 – 2022; • The Planning System and Flood Risk Management Guidelines for Planning Authorities (Department of Environment, Heritage and Local Government and the Office of Public Works); • Greater Dublin Strategic Drainage Study; • Tallaght Local Area Plan 2008 (South Dublin County Council) o Now expired.
1.3 Site Location
The subject site is located west of Belgard Road, Tallaght, Dublin 24; less than 500m north of The Square, Tallaght, as shown in Figure 1.1 - Site Location , and is immediately bound by:
• Airton Road and Belgard Retail Park, to the north; • R113, Belgard Road, to the east; • SDCC St. Maelruans Site, to the west; • Belgard Square North road, to the south.
1 Project No. A557 Issued: 19.12.2018 O’Connor Sutton Cronin & Associates Site-Specific Flood Risk Assessment Report Multidisciplinary Consulting Engineers Belgard Gardens, Tallaght, Dublin 24.
Belgard Retail Park
Property Ownership Boundary (Blue)
Phase I Extent (Red)
IT Tallaght Campus
St. Maelruans Site (SDCC Property)
Tallaght University Hospital
Tallaght LUAS Stop
The Square, Tallaght
Figure 1.1 - Site Location
1.4 Information Consulted
The Flood Risk Assessment was based on the following available information:
• C624 Development and Flood Risk (Construction Industry Research and Information Association, CIRIA); • OPW website www.floodmaps.ie ; • DECLG website www.myplan.ie ; • OPW website www.floodinfo.ie ; • OPW National Preliminary Flood Risk Assessment; • OPW Dublin Pluvial Study. Flood Resilient City; • OPW Irish Coastal Protection Strategy Study; • SDCC and Irish Water Drainage Records; • Public utility services records; • DCC GDSDS System Performance Records; • Geological Survey of Ireland (GSI) Maps; • Architectural floor plan drawing provided by the client and; • Topographical and Ground Penetrating Radar Surveys of the site and adjacent roads.
2 Project No. A557 Issued: 19.12.2018 O’Connor Sutton Cronin & Associates Site-Specific Flood Risk Assessment Report Multidisciplinary Consulting Engineers Belgard Gardens, Tallaght, Dublin 24.
2 SITE CONTEXT 2.1 Site Area
The subject site, 6.64 hectares in area (property ownership), is located west of Belgard Road, Tallaght Dublin 24; less than 500m north of The Square, Tallaght, as shown in Figure 1.1 - Site Location , and is immediately bound by:
• Airton Road and Belgard Retail Park, to the north; • R113, Belgard Road, to the east; • SDCC-owned St. Maelruans Site, to the west; • Belgard Square North road, to the south. Additional works are also to be carried out in the public area, in order to facilitate upgrades to the adjoining Belgrade Square North road, resulting in a total development area of c7.2 hectares.
2.2 Site Overview and Topography
The overall site area is approximately 6.64-hectares, with approximately 3.15- hectares, in the southern part of the site, which is to be developed as part of the Phase I application, as denoted by the red-line boundary in Figure 1.1 - Site Location . This Site-Specific Flood Risk Assessment Report assesses the context of the overall site area.
The existing site comprises three former commercial / industrial properties, which had been previously occupied by Kerry Group, Cuisine de France and UniPhar, along with associated hardstanding, landscaping and infrastructure.
The existing building’s footprints and hardstanding area cover approximately 75% of the overall site area, with approximately 1.5-hectare of existing green open space in the north-west area of the site.
The existing ground levels across the overall site are typically graded in an east to north-east direction, with a local high-point of approximately +102.50m near the mid-west of the site.
Adjacent to the site, the existing road levels are as follows:
• Airton Road, along the northern boundary, is graded from +98.8m to +97.3m AOD from the west;
3 Project No. A557 Issued: 19.12.2018 O’Connor Sutton Cronin & Associates Site-Specific Flood Risk Assessment Report Multidisciplinary Consulting Engineers Belgard Gardens, Tallaght, Dublin 24.
• Belgard Square North Rd, along the southern boundary, is graded from +101.3m AOD to +99.1m AOD from the west;
• The R113 Belgard Road, along the eastern boundary, is graded from +99.1m AOD to +97.3m AOD from the south.
The above illustrates that the existing site is currently at a raised level relative to the adjacent public roads. It is intended that the new development will retain a similar profile to the existing.
2.3 Site Access
The existing site is currently accessed, at ground level, from 3nr. separate access locations that serve the existing buildings i.e. 2nr. from Belgard Square North Road, at the south, and 1nr. from Airton Road, to the north.
2.4 Site Zoning
The subject site is zoned by South Dublin County Council for regeneration , with a General Zone Type classification scheme of M1: Mixed Use, general development, opportunity / proposal site in the South Dublin County Development Plan 2016 – 2022 . This zoning seeks to ‘To facilitate enterprise and / or residential led regeneration’ .
2.5 Proposed Development Context
The proposed development will consist of the demolition of all existing buildings on the site ranging from one to three storeys in height and the removal of hardstanding throughout. The development itself is to consist of the construction of:
• 5 no. blocks ranging from 4 – 10 storeys comprising a new urban quarter and streets to provide 438 no. apartment units consisting of 158 no. 1 beds, 230 no. 2 beds and 50 no. 3 beds (total apartment units include 8 no. live/work units; • 403nr. bed-space student accommodation and associated student amenity space and staff facilities; • Childcare facility and external playing area; • 6nr. retail / commercial units; • Security Room;
4 Project No. A557 Issued: 19.12.2018 O’Connor Sutton Cronin & Associates Site-Specific Flood Risk Assessment Report Multidisciplinary Consulting Engineers Belgard Gardens, Tallaght, Dublin 24.
• 107nr. below podium car parking spaces (a temporary car park at grade will be provided until such time as the completion of the permanent below podium car park); • 22nr. surface level car parking spaces; • 1,227nr. bicycle parking spaces located below podium and at surface level; • Civic Plaza and associated public realm & landscaping.
The proposed development will include the provision of a new north – south street bisecting the site (to later connect to the planned Airton Road Extension), a shared surface street running west east from Belgard Road (no vehicular connection to Belgard Road) to later connect to lands in ownership of SDCC if required, and works to public realm and public roads to include upgraded signalised junction to Belgard Square North and Belgard Square East, cycle track on Belgard Square North and new pedestrian crossing at Belgard Road.
The proposed development will also include boundary treatments, green roofs, solar panels, ESB substations and switch rooms, CHP plant, commercial and residential waste facilities and all ancillary works and services necessary to facilitate construction and operation. The proposed development will also include provision of site boundary protection where required to facilitate development phasing.
5 Project No. A557 Issued: 19.12.2018 O’Connor Sutton Cronin & Associates Site-Specific Flood Risk Assessment Report Multidisciplinary Consulting Engineers Belgard Gardens, Tallaght, Dublin 24.
3 LEVEL OF SERVICE 3.1 Flood Risk & Service Level
The risk of a flood event is a function of the probability of occurrence in any given year. Traditionally, this has been expressed as a return period (e.g. 1- in-100-year return period). However, this has led to misconceptions about the likelihood of repeat occurrences. A less ambiguous expression of probability is the Annual Exceedance Probability (AEP), which may be defined as the probability of a flood event being exceeded in any given year. A 1-in-100-year return period flood event is therefore expressed as a 1% AEP flood event. Likewise, a 1-in-1year return period flood event is expressed as a 100% AEP flood event.
The Greater Dublin Strategic Drainage Study (GDSDS), published by the Local Authorities in the Greater Dublin Region, and The Planning System and Flood Risk Management Guidelines for Planning Authorities (PSFRM) set out the best practice standards for flood risk in Ireland. These are summarised in Table 1 - Summary Level of Service , below.
Flooding Source Drainage River Tidal/Coastal
Residential 1% AEP 0.1% AEP 0.1% AEP
Commercial 1% AEP 1% AEP 0.5% AEP
Water-compatible – >1% AEP >0.5% AEP
Table 1 - Summary Level of Service
In addition, the GDSDS requires that ground floor levels of houses be provided with a 500mm freeboard over the 1% AEP fluvial flood level.
3.2 Climate Change
Both the GDSDS and PSFRM Guidelines require that account be taken of the effects of climate change over the design life of a development, typically 100 years. Design parameters to take account of climate change were established in the GDSDS and revised following later studies (as advised by Dublin City Council). These parameters are set out in Table 2 - Climate Change - Impact on Design Parameters , below.
6 Project No. A557 Issued: 19.12.2018 O’Connor Sutton Cronin & Associates Site-Specific Flood Risk Assessment Report Multidisciplinary Consulting Engineers Belgard Gardens, Tallaght, Dublin 24.
Design Category Impact of Climate Change
Drainage 10% increase in rainfall
Fluvial (River) 20% increase in flood flow
Tidal/Coastal Min FFL of 4.0m
Table 2 - Climate Change - Impact on Design Parameters
3.3 Flood Risk Zones
The PSFRM Guidelines adopt a sequential approach to managing flood risk by reducing exposure to flooding through land-use planning. The approach adopted by the PSFRM Guidelines establishes three zones ( PSFRM Guidelines paragraph 2.23 ) on a sliding scale of flood risk – refer to Table 3 - Flood Risk Zones, below.
High Probability of Flooding Where the annual probability of flooding is: Zone A greater than 1% for fluvial flooding or greater than 0.5% for coastal flooding
Moderate Probability of Flooding Where the annual probability of flooding is: Zone B between 0.1% and 1% for fluvial flooding or between 0.1% and 0.5% for coastal flooding
Low Probability of Flooding Where the annual probability of flooding is: Zone C less than 0.1% for fluvial flooding and less than 0.1% for coastal flooding
Table 3 - Flood Risk Zones
Flood risk zones are determined on the basis of the probability of river and coastal flooding only ( PSFRM Guidelines paragraph 2.24 ). Other sources of flooding (such as groundwater, infrastructure and pluvial) do not affect the delineation of flood risk zones. These other sources of flooding should be
7 Project No. A557 Issued: 19.12.2018 O’Connor Sutton Cronin & Associates Site-Specific Flood Risk Assessment Report Multidisciplinary Consulting Engineers Belgard Gardens, Tallaght, Dublin 24.
considered and mitigated in design. Flood risk zones are determined on the basis of the current flood risk, i.e. without the inclusion of climate change factors ( PSFRM Guidelines paragraph 2.24 ).
3.4 Development Vulnerability
The PSFRM Guidelines classify potential development in terms of its vulnerability to flooding. The types of development falling within each vulnerability class are described in Table 3.1 of the PSFRM Guidelines , which is reproduced in Table 4 - Development Vulnerability Class, below.
Vulnerability Land uses and types of development which include: Class
Highly Garda, ambulance and fire stations and command centres vulnerable required to be operational during flooding; development Hospitals; (including essential Emergency access and egress points; infrastructure) Schools; Dwelling houses , student halls of residence and hostels; Residential institutions such as residential care homes, children’s homes and social services homes; Caravans and mobile home parks; Dwelling houses designed, constructed or adapted for the elderly or, other people with impaired mobility; and Essential infrastructure, such as primary transport and utilities distribution, including electricity generating power stations and sub-stations, water and sewage treatment, and potential significant sources of pollution (SEVESO sites, IPPC sites, etc.) in the event of flooding.
Buildings used for: retail, leisure, warehousing, commercial, industrial and non-residential institutions; Land and buildings used for holiday or short-let caravans and camping, subject to specific warning and evacuation plans; Less vulnerable development Land and buildings used for agriculture and forestry; Waste treatment (except landfill and hazardous waste); Mineral working and processing; and Local transport infrastructure.
8 Project No. A557 Issued: 19.12.2018 O’Connor Sutton Cronin & Associates Site-Specific Flood Risk Assessment Report Multidisciplinary Consulting Engineers Belgard Gardens, Tallaght, Dublin 24.
Flood control infrastructure; Docks, marinas and wharves; Navigation facilities; Ship building, repairing and dismantling, dockside fish processing and refrigeration and compatible activities requiring a waterside Water- location; compatible Water-based recreation and tourism (excluding sleeping development accommodation); Lifeguard and coastguard stations; Amenity open space, outdoor sports and recreation and essential facilities such as changing rooms; and Essential ancillary sleeping or residential accommodation for staff required by uses in this category (subject to a specific warning and evacuation plan).
Table 4 - Development Vulnerability Class
Therefore, the proposed development is considered Highly Vulnerable .
3.5 Development ‘Appropriateness’
The PSFRM Guidelines define the zones in which each class of development is appropriate – this is summarised in Table 5 - "Appropriateness" Matrix, below. The PSFRM Guidelines recognises that flood risks should not be the only deciding factor in zoning for development. They also recognise that circumstances will exist where development of a site within a floodplain is desirable; in order to achieve compact and sustainable development of the core of urban settlements. In order to allow consideration of such development, the PSFRM Guidelines provide a Justification Test , which establishes the criteria under which desirable development of a site in a floodplain may be warranted.
9 Project No. A557 Issued: 19.12.2018 O’Connor Sutton Cronin & Associates Site-Specific Flood Risk Assessment Report Multidisciplinary Consulting Engineers Belgard Gardens, Tallaght, Dublin 24.
Flood Zone A Flood Zone B Flood Zone C
Highly Vulnerable Justification Test Justification Test Appropriate Development
Less Vulnerable Justification Test Appropriate Appropriate Development
Water- compatible Appropriate Appropriate Appropriate Development
Table 5 - "Appropriateness" Matrix
3.6 Proposed Development
The proposed development is to consist of the demolition of existing buildings followed by the construction of a mixed-use development, over partial basement. The proposed development is a mix of residential and commercial and retail uses and therefore is classed as a ‘Highly Vulnerable Development’ in accordance with Table 3.1 of the PSFRM Guidelines and as per Section 3.4 .
The information outlaid in the following chapters also illustrate that the proposed development is located within ‘Flood Zone C ’; therefore indicating that the proposed development is appropriate for purpose.
10 Project No. A557 Issued: 19.12.2018 O’Connor Sutton Cronin & Associates Site-Specific Flood Risk Assessment Report Multidisciplinary Consulting Engineers Belgard Gardens, Tallaght, Dublin 24.
4 FLOOD RISK AND MITIGATION MEASURES 4.1 Historical Flooding
4.1.1 OPW’s Historical Flood Mapping
The Office of Public Works (OPW) collates available reports on flooding from all sources (e.g. fluvial, pluvial, coastal, infrastructure) on a nationwide basis. The OPW’s floodmaps.ie website was consulted to obtain reports of historical flooding within the vicinity of the subject site; refer to Figure 4.1, below. The Flood Map Report Summary, included in Appendix A , lists reports of historical flooding within 2.5km of the subject site, none of which caused impact to the subject site or adjacent roads.
Site Location
Figure 4.1 - OPW floodmaps.ie Reports
4.2 Fluvial Flooding
4.2.1 Site Location
The site is located approximately 750m north from a branch of the River Dodder, which is bound on its northern bank (i.e. the side closest to the proposed development) by the N81. The Tymon River, which rises at Cookstown, discharges its upper reaches, via a 1050mm diameter pipe from the northerly direction (Refer to the SDCC and IW public records in Appendix E), approximately 200m to the east of the proposed
11 Project No. A557 Issued: 19.12.2018 O’Connor Sutton Cronin & Associates Site-Specific Flood Risk Assessment Report Multidisciplinary Consulting Engineers Belgard Gardens, Tallaght, Dublin 24.
development, within the grounds of the Institute of Technology, Tallaght. Refer to Figure 4.2, below, for context.
River Tymon
Site Location
~200m R113
N81
~750m
River Dodder Branch
Figure 4.2 - Site Proximity to Rivers
The River Tymon is the origin of the River Poddle, which discharges to the River Liffey at Dublin City Centre.
4.2.2 Catchment Flood Risk Assessment and Management
The OPW, in conjunction with South Dublin County Council, Dublin City Council and other Local Authorities have developed the ‘ Final Flood Hazard and Risk Maps (Volume II) ’ as part of the ‘ Catchment Flood Risk Assessment and Management ’ (CFRAM) programme. More specifically, fluvial-flood extent mapping for the both the River Poddle and the River Dodder’s catchment is available through the OPW’s CFRAM website and within the Strategic Flood Risk Assessment (SFRA) for Dublin City Development Plan 2016-2022 . The excerpt below, refer Figure 4.3, is taken from the online mapviewer www.floodinfo.ie and clearly demonstrates that the subject site is not at risk of fluvial flooding from the predicted 1.0% and 0.1% flood extents of the adjacent rivers.
12 Project No. A557 Issued: 19.12.2018 O’Connor Sutton Cronin & Associates Site-Specific Flood Risk Assessment Report Multidisciplinary Consulting Engineers Belgard Gardens, Tallaght, Dublin 24.
River Poddle 1.0% & 0.1% Flood Extent
River Poddle
Site Location
River Dodder
River Dodder 1.0% & 0.1% Flood Extent
Figure 4.3 - Fluvial Flood Extents (from www.floodinfo.ie )
Figure 4.3, above, indicates that the proposed site is located outside of the predicted fluvial flood extent for both the 1% AEP and 0.1% AEP events for the River Liffey, the River Camac and the River Poddle. Refer to OPW’s CFRAM Fluvial Flood Extent Maps E09POD_EXFCD_F0_0 and TS/EXT/UA/CURS/102 , for the River Poddle and River Dodder respectively, in Appendix C for full details.
4.2.3 Proposed Development Context
Based on the above, it is concluded that the site of the proposed ‘Highly Vulnerable Development’ is not located within either Flood Zones A and B (i.e. is in Flood Zone C ) for fluvial flooding, in accordance with The Planning System and Flood Risk Management Guidelines for Planning Authorities and there is therefore no significant risk of fluvial flooding.
4.3 Tidal Flooding
4.3.1 Site Location
The proposed development is located approximately 11-kilometers west of the eastern-coastline. Refer to Figure 4.4, below, for context. This also
13 Project No. A557 Issued: 19.12.2018 O’Connor Sutton Cronin & Associates Site-Specific Flood Risk Assessment Report Multidisciplinary Consulting Engineers Belgard Gardens, Tallaght, Dublin 24.
shows that the site is not in the vicinity of the tidally influenced areas of the rivers that are described above in Section 4.2 Fluvial Flooding .
~11km
Site Location
Figure 4.4 - Site Proximity to Coastline
4.3.2 Catchment Flood Risk and Assessment Mapping
The OPW’s Preliminary Flood Risk Assessment (PFRA) mapping for Coastal flooding is available on the Department of Environment, Community and Local Government’s (DECLG) website www.myplan.ie . Refer to Figure 4.5 for further details.
Predicted Coastal Flood Extent
Site Location
Figure 4.5 - Coastal Flooding Extent (www.myplan.ie)
14 Project No. A557 Issued: 19.12.2018 O’Connor Sutton Cronin & Associates Site-Specific Flood Risk Assessment Report Multidisciplinary Consulting Engineers Belgard Gardens, Tallaght, Dublin 24.
4.3.3 Proposed Development Context
From Section 4.3.2 , the subject site is not located within the predicted tidal flood extent for up to, and including, a 0.1% AEP event. Furthermore, the proposed development site has a typical existing level of approximately +100.0mAOD to +101.5mAOD, which considerably above the tidal flood risk zone.
Therefore, in accordance with The Planning System and Flood Risk Management Guidelines for Planning Authorities, the subject site is located within Flood Zone C for tidal flooding and there is no significant risk of tidal flooding.
4.4 Pluvial Flooding
4.4.1 Preliminary Flood Risk Assessment
Indicative localised pluvial flood extent mapping for the South Dublin area area is available for viewing, in Appendix D of the Strategic Flood Risk Assessment for South Dublin County Council Development Plan, 2016 – 2022. Figure 4.6 - Indicative Pluvial Flood Extent , indicates the indicative flood risk areas for the predicted pluvial flood extent from 1% AEP and extreme rainfall events over the vicinity of the proposed development.
Site Location
Indicative Pluvial 1.0% AEP and Extreme Flood Extent
Figure 4.6 - Indicative Pluvial Flood Extent
15 Project No. A557 Issued: 19.12.2018 O’Connor Sutton Cronin & Associates Site-Specific Flood Risk Assessment Report Multidisciplinary Consulting Engineers Belgard Gardens, Tallaght, Dublin 24.
The above figure illustrates that there is indicative pluvial flood extent within the existing site boundary. However, these indicative locations appear to be situated on the existing buildings. The proposed development comprises the demolition of the existing buildings and existing infrastructure, with the construction of an entire new development and surface water network across the entire site area, which will be designed to accommodate up to, and including, the 1% AEP rainfall event including a 10% allowance for climate change. This is detailed further in Section 4.6 of this report.
4.4.2 Proposed Development Context
The proposed development is to contain a private surface water network that is to discharge an attenuated flow, designed to restrict outflows to a
maximum QBAR URBAN flow rate of 10.27 l/s/ha (68.2 l/s total) with attenuation to account for a design rainfall event up to , and including, the 1% AEP (including 10% allowance for climate change). Refer Section 3.4 and the Engineering Services Report, A557-OCSC-XX-XX-RP-C-0001, which is submitted under separate cover as part of this application, for further details of the proposed surface water drainage strategy.
Subsequently, and further to Section 4.4.1 of this report, it can be seen that the proposed development is not at risk from flooding due to the predicted 1% AEP and extreme rainfall events, based on the Dublin Pluvial Study. Refer to the OPW’s Pluvial Flood Map MDW0657_00028 in Appendix D for further details.
Therefore, in accordance with The Planning System and Flood Risk Management Guidelines for Planning Authorities, there is no significant risk of pluvial flooding within the subject site.
4.5 Existing Public Drainage Infrastructure
There is significant existing public surface water sewer networks in the immediate vicinity of the site. Refer to South Dublin County Council and Irish Water records in Appendix E for further details. Appendix E also contains details of the GDSDS Sewer Performance Assessment mapping for both the current scenario (Map Nr. GDSDS/NE02057/S1005/P3-002/TILE 1 ) and
16 Project No. A557 Issued: 19.12.2018 O’Connor Sutton Cronin & Associates Site-Specific Flood Risk Assessment Report Multidisciplinary Consulting Engineers Belgard Gardens, Tallaght, Dublin 24.
the year-2031 future scenario (Map Nr. GDSDS/NE02057/S1005/P3- 003/TILE 1 ).
Further topographical and ground penetrating radar surveys were also carried out to confirm the existing drainage infrastructure.
The existing site is currently served by its own internal surface water drainage networks that discharge to the public surface water network at 5nr. locations i.e. 2nr. at the northern end of the site to an existing 600mm diameter sewer and 3nr. at the southern end of the site to an existing 600mm diameter sewer.
The 600mm diameter concrete sewer, to the south of the site, augments to a 1050mm diameter pipe downstream prior to discharging to the branch of the River Dodder, to the south of the N81.
The 600mm dimeter concrete sewer, to the north of the site, augments to a 1050mm diameter pipe downstream prior to discharging to the River Tymon, within the grounds of the Institute of Technology, Tallaght.
As described in Section 2.2 , the site is at a relatively higher level than the adjacent roads, which appear to be graded away from the site, towards the north-east. Therefore, any potential flooding of adjacent public surface water manholes (due to possible blockages), would be directed away from the site by overland flow. Therefore flood risk from the existing public drainage infrastructure is considered negligible, with no further mitigation required.
4.6 Proposed Drainage Infrastructure
It is proposed to separate the surface water and wastewater drainage networks, which will serve the proposed development, and provide independent connections to the adjacent public surface water and combined sewer networks respectively.
At roof level, within the development, the rainfall runoff is to be collected by a series of downpipes, as part of an extensive & intensive green roof system that serves the development’s roofs, where practicable, prior to discharging to the proposed surface water network within the developments road carriageways.
17 Project No. A557 Issued: 19.12.2018 O’Connor Sutton Cronin & Associates Site-Specific Flood Risk Assessment Report Multidisciplinary Consulting Engineers Belgard Gardens, Tallaght, Dublin 24.
All road and associated hardstanding areas are to discharge to the proposed surface water network via an aligned bio-retention strip that has a filter trench underneath.
The proposed surface water drainage network will then discharge attenuated flows to the public surface water network at Airton Road, to the north of the site through the provision of flow control chambers and attenuation storage structures.
The proposed surface water drainage network has been designed to cater for the rainfall runoff resulting from a 1% AEP rainfall event (Including 10% increase for climate change). Refer to the Engineering Services Report, A557- OCSC-XX-XX-RP-C-0001, and associated drawings, which have been submitted under separate cover as part of this application for further details.
Provided that the proposed drainage system is to be constructed as designed (in accordance with the relevant standards and regulations), the flood risks arising from the proposed drainage infrastructure will be negligible and no further mitigation is required.
4.7 Groundwater Flooding
As outlined in the Strategic Flood Risk Assessment for South Dublin County Council Development Plan, 2016 – 2022, ‘the OPW Preliminary Flood Risk Assessments Groundwater Flooding Report concludes that ground water flooding is largely confined to the West Coast of Ireland due to the hydrogeology of the area’, and that ‘ground water flooding is not at risk for South Dublin Council’ .
The OPW’s Draft Preliminary Flood Risk Assessment (DPFRA) includes an assessment of groundwater flood risk. The DPFRA flood risk map included in Appendix B indicates no groundwater flood risk to the site or to the surrounding area.
There is no anecdotal record of groundwater flooding for the subject site. According to data obtained from the Geological Survey of Ireland mapviewer (http://www.gsi.ie ), the subject site is located on made ground subsoil on top of till that was derived from limestones, with a bedrock of Lucan Formation - Dark Limestone and Shale (calp). It is located on a locally important aquifer
18 Project No. A557 Issued: 19.12.2018 O’Connor Sutton Cronin & Associates Site-Specific Flood Risk Assessment Report Multidisciplinary Consulting Engineers Belgard Gardens, Tallaght, Dublin 24.
with bedrock, which is moderately productive only in local zones. The groundwater vulnerability assessment of the site indicates a moderately to poor productive bedrock aquifer in the locality.
The probability of groundwater rising above ground levels is considered extremely low. In any such event, water would follow overland flow routes (Refer to Section 4.4 ) and not collect at or near proposed buildings.
It is therefore concluded that the potential flood risk represented by ground water is negligible and no further mitigation is required.
19 Project No. A557 Issued: 19.12.2018 O’Connor Sutton Cronin & Associates Site-Specific Flood Risk Assessment Report Multidisciplinary Consulting Engineers Belgard Gardens, Tallaght, Dublin 24.
5 CONCLUSIONS AND RECOMMENDATIONS 5.1 Flood Risk Assessment Overview
As detailed within Section 4 of this report, the proposed development is clearly located within Flood Zone C for both fluvial and tidal flooding and is not at risk from pluvial flooding nor groundwater. Therefore, in accordance with The Planning System and Flood Risk Management Guidelines for Planning Authorities , there is no significant risk of flooding within the subject site .
5.2 Proposed Development Infrastructure
All rainfall runoff within the proposed site development area is to discharge an attenuated flow of 10.3 l/s/ha (68.2 l/s total) to the existing public surface water network at Airton Road, to the north of the proposed development. The on-site attenuation is to be designed for rainfall events up to, and including the 1% AEP (including 10% increase for climate change). Refer to the Engineering Services Report A557-OCSC-XX-XX-RP-C-0001 and associated civil engineering drawings, which have been submitted under separate cover as part of this application, for further details.
5.3 Recommendations
It is recommended that the proposed drainage system, to serve the development, is designed in accordance with the relevant standards (Refer Section 1.4 ) and as outlined in the Engineering Services Report, A557-OCSC- XX-XX-RP-C-0001 , and associated civil engineering drawings that form part of this submission; in order to ensure that potential flood risks arising from the proposed development are negligible and no further mitigation measures are required.
MARK KILLIAN MSc BE CEng MIEI For OCSC MULTIDISCIPLINARY CONSULTING ENGINEERS
20 Project No. A557 Issued: 19.12.2018
APPENDIX A. FLOODMAPS.IE REPORT
Appendix A Floodmaps.ie Report
Summary Local Area Report This Flood Report summarises all flood events within 2.5 kilometres of the map centre. The map centre is in: County: Dublin NGR: O 087 280
This Flood Report has been downloaded from the Web site www.floodmaps.ie. The users should take account of the restrictions and limitations relating to the content and use of this Web site that are explained in the Disclaimer box when entering the site. It is a condition of use of the Web site that you accept the User Declaration and the Disclaimer. Map Legend Flood Points
Multiple / Recurring Flood Points Areas Flooded
Hydrometric Stations
Rivers
Lakes
River Catchment Areas
Land Commission *
Drainage Districts *
Benefiting Lands * * Important: These maps do not indicate flood hazard or Map Scale 1:15,208 flood extent. Thier purpose and scope is explained in the 9 Results Glossary.
1. Flooding at Knockmore, Tallaght, Co. Dublin on 24th Oct 2011 Start Date: 24/Oct/2011 County:Dublin Flood Quality Code:3
Additional Information: Reports (1) More Mapped Information
2. Flooding at Tallaght Pass, N81, Dublin 24 on 24th Oct 2011 Start Date: 24/Oct/2011 County:Dublin Flood Quality Code:2
Additional Information: Reports (1) More Mapped Information
3. Dodder Avonmore Park Nov 2000 Start Date: 05/Nov/2000 County:Dublin Flood Quality Code:3
Additional Information: Reports (1) More Mapped Information
4. Flooding at Blessington Road, Tallaght, Dublin 24 on 1st May Start Date: 05/Jan/2012 2012 County:Dublin Flood Quality Code:2
Additional Information: Reports (1) More Mapped Information
5. Flooding at Bawnlea Crescent and Avenue, Tallaght, Co. Dublin Start Date: 24/Oct/2011 on 24th Oct 2011 County:Dublin Flood Quality Code:2
Report Produced: 17-May-2018 11:44 Additional Information: Reports (1) More Mapped Information
6. Flooding at Whitestown Way, Tallaght, Dublin 24 on 24th Oct Start Date: 24/Oct/2011 2011 County:Dublin Flood Quality Code:2
Additional Information: Reports (1) More Mapped Information
7. Dodder Kiltipper Road Nov 2000 Start Date: 05/Nov/2000 County:Dublin Flood Quality Code:3
Additional Information: Reports (1) More Mapped Information
8. Killinarden Stream Jobstown recurring Start Date: County:Dublin Flood Quality Code:4
Additional Information: Reports (1) Press Archive (1) More Mapped Information
9. Killinarden Stream N81 Jobstown Recurring Start Date: County:Dublin Flood Quality Code:4
Additional Information: Reports (1) Press Archive (1) More Mapped Information
Report Produced: 17-May-2018 11:44
APPENDIX B. OPW PFRA INDICATIVE EXTENTS & OUTCOMES MAP
Appendix B OPW PFRA Indicative Extents and Outcomes Map
kjFINGLAS, GLASNEVIN © Government of Ireland Location Plan : Osi permit number EN-002-1011 kj ¯
CLONTARF kj
Legend: Flood Extents DUBLIN CITY Fluvial - Indicative 1% AEP (100-yr) Event kj Fluvial - Extreme Event
No Fluvial Data Available For Area 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 kj Probable Area for Further Assesment kj 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 No Fluvial Data Available For Area Trim No Fluvial Data Available For Area Co Meath Ireland
Project : PRELIMINARY FLOOD RISK ASSESMENT (PFRA) No Fluvial Data Available For Area No Fluvial Data Available For Area Map : PFRA Indicative extents and outcomes - Draft for Consultation No Fluvial Data Available For Area Figure By : PJW Date : July2011 Checked By : MA Date : July 2011
Figure No. : Revision 2019 / MAP / 238 / A No Fluvial Data Available For Area 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
APPENDIX C. CFRAM FLUVIAL FLOOD EXTENT MAPS - River Poddle
- River Dodder
Appendix C CFRAM Fluvial Flood Extent Maps
308800 309000 309200 309400 309600 309800 310000 310200 310400 310600 !(
09PODD00882J !( 0 0 0 0 4 4 09PODD00865J 8 8 2 2 2 !( 2 Poddle
!(
09PODD00951 09PODD00905 0 0 0 0 2 2
8 09PODD01005 8 2 2 2 !( 2 IMPORTANT USER NOTE: THE VIEWER OF THIS MAP SHOULD REFER TO THE DISCLAIMER, GUIDANCE NOTES !( AND CONDITIONS OF USE THAT !( ACCOMPANY THIS MAP. !( Legend 10% Fluvial AEP Event 09PODD01054
0 0 1% Fluvial AEP Event 0 0
0 09PODD00994J 0
8 8 0.1% Fluvial AEP Event 2 2 2 2 Modelled River Centreline AFA Extents !( Node Point Node ID Node Label 0 0 0 0 8 8 7 7 2 2 2 2 0 0 0 0 6 6 7 7 2 2 2 2 FINAL REV: NOTE: DATE: 0 0 0 0 4 4 7 7 2 2 2 2 0 0 0 0 2 2
7 7 The Office of Public Works Elmwood House T +44(0) 28 90 667914
2 2 Jonathan Swift Street 74 Boucher Road F +44(0) 28 90 668286 2 2 Trim Belfast W www.rpsgroup.com Co Meath BT12 6RZ E [email protected]
Map: Poddle River Fluvial Flood Extents Map Type: EXTENT Source: FLUVIAL
0 Node Label Water Level (OD) Flow (m³/s) Water Level (OD) Flow (m³/s) Water Level (OD) Flow (m³/s) 0 Map Area: HPW 0 10% AEP 10% AEP 1% AEP 1% AEP 0.1% AEP 0.1% AEP 0 0 0 Scenario: CURRENT 7 09PODD01005 87.92 1.94 87.97 2.15 87.99 2.31 7 2 2
2 09PODD01054 92.74 2.19 92.91 3.09 93.03 3.86 2 Drawn By : F.M.C. Date : 11 August 2016 09PODD00994J 86.23 2.2 86.32 2.68 86.43 3.37 Checked By : A.S. Date : 11 August 2016 09PODD00951 80.46 2.77 80.59 3.93 80.73 5.38 Approved By : S.P. Date : 11 August 2016 09PODD00905 75.51 3.36 75.75 5.03 76.25 7.2 Drawing No. : E09POD_EXFCD_F0_01 308800 309000 309200 309400 309600 309800 310000 310200 310400 310600 0 60 120 240 360 480 600 Map Series : Page 1 of 6 [ Drawing Scale : 1:6,050 @A3 Metres © Ordnance Survey Ireland. All rights reserved. Licence number EN 0021016/OfficeofPublicWorks. "
" " © Ordnance Survey Ireland. Licence number " 2010/22/CCMA/Dublin City Council Location Plan: "
" " " TS1_3471
TS1_3111 Duubblliinn Dublin ± TS1_3165 TS1_3475 TS1_3051 TS1_3570
" TS1_3047 TS1_3320
" TS1_3010 " Legend: " 10 % AEP Flood Extent (1 in 10 chance in any given year)
1 % AEP Flood Extent (1 in 100 chance in any given year) " 0.1 % AEP Flood Extent " (1 in 1000 chance in any given year) Defended Area
" High Confidence (<20m) (10% AEP)
" " Medium Confidence (<40m) (10% AEP)
! ! ! ! ! ! ! ! ! !
!
! ! ! ! ! ! ! !
TS1_2790 ! Low Confidence (>40m) (10% and 0.1% AEP)
" " High Confidence (<20m) (1% AEP)
Medium Confidence (<40m) (1% AEP) TS1_2488
! ! ! ! ! ! ! ! ! !
!
! ! ! ! ! ! ! !
" ! Low Confidence (>40m) (1% AEP) TS1_2590 River Centreline Node Point TS1_2320 "
" " OS_2975 Node Label (refer to table) ! TS1_2209 " ! ! Flow reporting location
TS1_2503 " 10% Flow = 1.20 " 1% Flow = 1.56 Peak flow during design flood extent ! TS1_2092 0.1% Flow = 2.17 10% Flow = 13.2 m3/s 1% Flow = 21.758 m3/s
3 " USER NOTE: ! " 0.1% Flow = 35.557 m /s 10% Flow = 10.68 m3/s TS1_2300 USERS OF THESE MAPS SHOULD REFER TO THE DETAILED 1% Flow = 18.846 m3/s DESCRIPTION OF THEIR DERIVATION, LIMITATIONS IN 3 " ACCURACY AND GUIDANCE AND CONDITIONS OF USE 0.1% Flow = 29.867 m /s " " TS2_560 PROVIDED AT THE FRONT OF THIS BOUND VOLUME. IF THIS MAP DOES NOT FORM PART OF BOUND VOLUME, IT
! SHOULD NOT BE USED FOR ANY PURPOSE. TS1_2115 !
! " " 3 Client: 10% Flow = 3.57 m /s " TS1_1820 1% Flow = 5.9 m3/s 3 " 0.1% Flow = 9.34 m /s " TS1_1990 22 TS2_360 Project: DODDER CATCHMENT FLOOD RISK " " ASSESSMENT AND MANAGEMENT STUDY
Map: PRESENT DAY TALLAGHT STREAM
" " " Map Type: FLOOD EXTENT _1456 Source: FLUVIAL FLOODING " Map Area: URBAN AREA " Scenario: CURRENT TS2_180 Drawn By : A.A.B Date : 26 November 2010
Checked By : A.J. " " Date : 26 November 2010 Approved By : A.G.B Date : 26 November 2010 3
10% Flow = 3.58 m /s " ! ! 3 Figure No. : 1% Flow = 5.96 m /s " 0.1% Flow = 9.71 m3/s TS/EXT/UA/CURS/102
" " Map Series : Page 2 of 3 " Drawing Scale : 1: 5,000 Plot Scale : 1:1 @ A3 TS2_0 0 0.1 0.2 " " Kilometers
ELMWOOD HOUSE TEL : 028 9066 7914
" 74 BOUCHER ROAD FAX : 028 9066 8286 BELFAST BT12 6RZ www.rpsgroup.com/Ireland
" "
APPENDIX D. INDICATIVE PLUVIAL FLOOD EXTENT MAPPING
Appendix D Indicative Pluvial Flood Risk Map
APPENDIX E. SOUTH DUBLIN COUNTY COUNCIL DRAINAGE MAPS - Irish Water Public Drainage Maps
- GDSDS 2011 System Performance Assessment Map
- GDSDS 2031 System Performance Assessment Map
Appendix E
South Dublin County Council Drainage Maps
Iris h W ate r W e bm ap ´
1:5,000 Re pr od uc e d f ro m the Or d n an c e 0 0.05 0.1 0.2 m i Sur ve y Of I re la nd by Pe r m is s io n o f t he Gove rn m e nt . Lic e ns e N o. 3 -3-34
0 0.075 0.15 0.3 km
June 20, 2017 © Ord nanc e Surve y Ire land | Ord nanc e Surve y Ire land | Iris h W ate r give s this inform ation as to the pos ition of its und e rground ne twork as a ge ne ral guid e only on the s tric t und e rs tand ing that it is bas e d on the be s t available Le ge nd inform ation provid e d by e ac h Loc al Authority in Ire land . It Stormwater Gravity Mains (Irish Water Owned) Storm Fittings Sewer Gravity Mains (Non-Irish Water owned) s hould not be re lie d upon in the e ve nt of e xc avations or othe r works be ing c arrie d out in the vic inity of the ne twork. The Surfac e Ve nt/Col Com bine d onus is on the partie s c arrying out the works to e ns ure the Stormwater Gravity Mains (Non-Irish Water Owned) Othe r; U nknown Foul e xac t loc ation of the ne twork is id e ntifie d prior to m e c hanic al works be ing c arrie d out. Se rvic e pipe s are not ge ne rally Surfac e Storm Discharge Points Ove rflow s hown but the ir pre s e nc e s hould be antic ipate d . Storm Manholes Outfall Unknown Cas c ad e “Gas N e tworks Ire land (GN I), the ir affiliate s and as s igns , ac c e pt no Ove rflow Sewer Pressurized Mains (Irish Water owned) re s pons ibility for any inform ation c ontaine d in this d oc um e nt c onc e rning Catc hpit Soakaway Com bine d loc ation and te c hnic al d e s ignation of the gas d is tribution and trans m is s ion Hatc hbox ne twork (“the Inform ation”). Any re pre s e ntations and warrantie s e xpre s s or Othe r; U nknown Foul im plie d , are e xc lud e d to the fulle s t e xte nt pe rm itte d by law. N o liability s hall be Lam phole Storm Culve rts Ove rflow ac c e pte d for any los s or d am age inc lud ing, without lim itation, d ire c t, ind ire c t, s pe c ial, inc id e ntal, punitive or c ons e que ntial los s inc lud ing los s of profits , Stand ard Storm Cle an Outs Unknown aris ing out of or in c onne c tion with the us e of the Inform ation (inc lud ing m aps or m apping d ata). N OTE: DIAL BEFORE Y OU DIG Phone 1850 427 747 or e -m ail Othe r; U nknown Sewer Gravity Mains (Irish Water owned) Sewer Pressurized Mains (Non-Irish Water owned) d ig@gas ne tworks .ie – The ac tual pos ition of the gas /e le c tric ity d is tribution and Storm Inlets Com bine d Com bine d trans m is s ion ne twork m us t be ve rifie d on s ite be fore any m e c hanic al Gully e xc avating take s plac e . If any m e c hanic al e xc avation is propos e d , hard c opy Foul Foul m aps m us t be re que s te d from GN I re gas . All work in the vic inity of the gas Stand ard Ove rflow Ove rflow d is tribution and trans m is s ion ne twork m us t be c om ple te d in ac c ord anc e with the c urre nt e d ition of the He alth & Safe ty Authority public ation, ‘Cod e of Othe r; U nknown Unknown Unknown Prac tic e For Avoid ing Dange r From U nd e rground Se rvic e s ’ whic h is available from the He alth and S afe ty A uthority (1890 28 93 89) or c an be d ownload e d fre e of c harge at www.hs a.ie .”
ER OW Factory L
AD RO Legend NT RK OU PA M LY AL use B Ho ay S kw AA ar N P Industrial S B ND A WLA L NE L Estate Y M
O U AD N RO T
IVE DR Wastewater Treatment Works
Car Park
E
V
I
R
D
S Industrial
D
N A
L Estate W
E
N
D
A
O
R
W
E Car Park N SD004ISD004I County Council Boundaries Westway Centre Crosslands Business Park
R
O A D B County Council Boundaries A L Car Park AD L RO Y M
O S U ND LA N W T E N A V Western E N U Parkway E Business Park Rising Main (Coloured as sewer) Industrial Estate
Car Park AS NA
ER Sewer not included in hydraulic model W LO
AD RO AD RO AD RO Mound
T UN MO LY Direction of Flow (on sewer line) L BA Business T Centre UN O M Calmount AL C Business
Park
C
A
L
M
O
U N River/Watercourse T
Hotel A
V
E
N
U
E
Culverted River/Watercourse Tower
S T B A L LY M O U N J T O S E P D H A 'S O R 1:1000 OS Grid Line Boundaries Ballymount Park
AD O R R ' S O ES A M D AS A NA J R T O S AD
ST OAD B R RI DG E 1:5000 OS Grid Line Boundaries U T' P S PE DR R I VE
T EN C ES CR Combined Sewer Overflow
S L 'S L Y I N H O N H B T E N A E A L R L Y G M
O U N T T S
BA B L E LY L M G O Foul/Combined Pumping Station A U N R T D
D
A R O O R A 'S D A B M U L O C T S
R Newlands Cross Cemetery O T A N D Golf Course E C
S
E
R
C Foul/Combined Bifurcation
A V E N U E
S ' U N PP A E D R N
E
R B Foul/Combined Apex Manhole T
S
1
.
8
3
m
F B
F A LL YM OU NT
RO AD U PP ER Foul/Combined Flow Management Chamber Kingswood Castle Pa RK rk PA w ST E ay Recycling Centre UND OR B NM us MALACHY'S DU in es s C 1.83m FF en tr e Industrial Estate
ARK RE P NMO DU T N U E N C D S E R C Storm Water Overflow to Foul/Combined K AR P RE D MO U UN T N D N M E O C R S E E R P C A R K
F 1.83m F S' MOOREENARUGGAN Y N
D O H A T 80.19 O N R A Storm Water Pumping Station
'S N K A T R D S PA N E Westgate Business R B Park FF 1.83m
RE MO UN Storm Water Bifurcation D T S
Ballymount Park
Indusrial Estate S
L
L 80.17 I
H
N Storm Water Apex Manhole E
E
R
G E OV GR
T IBR AD Westgate DE
1 N
.
8 3
m Business Park
F F
D D Storm Water Flow Management Chamber R A E IVE R O
O R M D UN U D N M O R E
E G E U S N R O E O L V V C A E E
D S L O IE L
F C
S H ' S
A S
E M
E A J U N E E V U V O ND N A R
U D W A G
N A F
O D L O R R
E S T T S E L 80.24 R A T
O W S F N Flooding Performance Key 1.83 E m FF E K Convent A L I K
N A E E S R H T D F N D O IE U M L O A D R N M U Y B N P LL I D A T A E RK B F O E R E D S A T E K
BA LLY MO UN Flooding greater than 25m3 Volume for 79.62 T A VEN UE
E
U
N
E
V
E A
U N W N E V AL A A N V C U L T L Y 5yr Return Period Event (Volume m3) A A O S V S S H E E E F N S 1 IE U . L E O 8 D L 3 C m D R E I V F S E T F E U S O O L N L L C C A ST UND W E R UE FO N VE A 'S EL M ST
79.54 D L School IE E F A G S S I H H O R S F L A IE R LD LU C D GN O R A C IV Q Flooding less than 25m3 Volume for 5yr E UI D LL A A O AV R EN UE F O R E S W T A A L V N E ST U F T N U F D E U Return Period Event A RI S VE D H N J F AM IE O ES LD T 'S
C L T O N S E U RO O AD U M N Y D L L A B
E
S G LE O N
L D E O S C O S O L Y L M L U C V O A GN A N O N AQ U D O IL 79.65 LA N R E Church L Modelled Manhole does not flood for 5 CL G OS E
'S C 1.8 D R L 3m O FF A R
A S E F O AV U D R B E R O E N N IV R NU I E E E E E F OV V S R A T G
L year Return Period Event L W A A H L NU N T A E C R V L O N O AN Y O S T M T R E S G
T Church K U R N A E T P PL S D M E R E H T IV C E TY L N S IM College A L EK N L IL Fire Station I N H N E E R HA G LL
A VE NU GR E OV E E S All Historically Reported Flooding Incidents Car Park O L T C S E T R U O N F F L O A E R E W U S N T E Tymon Park V N A A E V E E R N G U caused by Hydraulic Overloading E
80.58 ROAD UNT BALLYMO
81.46
N E A U V EN L AV Y S F O R W E E S ST K T E IL Lis-na-Creive T R M N School S G P E A E R AR UR S R E KW PP H O E A KI O C F N Y G E Foul/Combined Hydraulic Performance Key U D E A R
A V E L N IM U TY E N E O K N W I H E L AL ST N L E SE PA R L O R N C K PA UE RK OG W SH AY MA KIL S Y L V A D N A O R S Y C U A D N M Limekiln Green D R O I R V E E Foul/Combined Sewer surcharges for 1 AD C O L R O S K E R PA A EE V R E T N
U 1.83 TY E m FF N ON E IV HA R L D L P or 2 year return period events A T RK S E R O D F 82.34 R IV E
T THR R EE EE E P R L AR OC A K K D RO CLOSE K A S D KILM Tennis I ASHOGUE GROVE K R S R A L A L P M I E A H Ground R T O N M E CA E Y R S G 84.02 29.4m³29.4m³ Foul/Combined Sewer floods for 30 year
29.4m³29.4m³ E
UE EN U AV N RE T E
O T V M A RE CA M E LIM A SY A PA EKILN R RK ROA IS R D Tennis Grounds K OA D Kingswood return period or less. U N Heights D
W A LK
S Y S C Y A C M HP12HP12 A LI O HP12HP12 M M EKIL R HP12HP12 N O E E R V S E I Y R
L D V RO Car Park AD A
N
N L E I U K N E E
V M T A I L K I S D R A R E I M V U N A 86.17 E VE T Foul/Combined Sewer does not surcharge A K S D I R A A D CW O M R R A I T V
E
T AM for 1 or 2 year return period events and Tymon Park AR IS K CL TH O E SE
TH does not flood for a 30 year return period E D OA R PA RK
E GA U R N TH E V A event or below. (eg 1,2,5,10,20) B E L K Y G AR A A P W R EE K D R IS T R A M T A HE T K Kilnamanagh IS R TA A T M M HE A A G R T Estate R IS EE K N
K R DA A K L P R E A E P H E T L T S A ver C ddle Ri M FP05FP05Po AV L FP05FP05 EN E FP05FP05 U Lake E
E L A E D T T IV R N TH A U E M Sports Ground R O D A O A D E R D M A Y S I L S O L O K R L Storm System Hydraulic Performance Key A
B C P AR N K A
V
E L
U Y
N S
E
V
A E L T T EL T HE S M H A C E C C A C O M S O E L T U T U L H H R E E 65.9m³65.9m³ R T E T P T 65.9m³65.9m³ AR 65.9m³65.9m³ K Belgard Castle D A L D T E H O E O W K S IN G N HP06HP06 G S I K HP06HP06 Lake W HP06HP06 O O Storm Sewer surcharges for 1 C D O G U R E R O I V T V E R D Kingswood Heights
T A RT or 2 year return period events M OU Tallaght TH A K C Lake E R S E K I RI E IN CR S A V H G E K AM O T S S T Theatre R W C H E L G O EN E M O T I C D G A H S T T S LE FB
N W A L Sports Ground
E D C H R LO GREENHILLSGREENHILLS T IV S GREENHILLSGREENHILLS E E GREENHILLSGREENHILLS K E S S RI O A L M C A T T A M Storm Sewer floods for 30 year A R IS K T V H K E IE AR G W P
R E O H V T E TH E
D A return period or less. O v R k 0 1 SK RI MA TA E L M C A S E T U N L N W E r E A T e AV L Y iv M R E R O S IS N le O E d L d C o P
T PAR H KVIEW E T Playground A Storm Sewer does not surcharge L M E IL A H H R T E K I Tymon Park S AR S I P K R R U G S Kilnamanagh R HB O R V O Estate E W OK A LA R L NE O K AD for 1or 2 year return period events and E L A E M V H C T A E S N T U L E E E E K S L R O M A L C P Tymon Park C A E S C T E L L R O E T S P does not flood for a 30 year return period E G A R R E K E N
E Sports Ground H T D B O E O L W G S A G S R IN L K L D I
H N event or below. (eg 1,2,5,10,20)
E
E
R
G PAR KVIEW
E L M C P A A S R T L K E H E G B I OS R E L L E L L C G ILL E A KH N R R D PA Tymon Park Important Hydraulic Considerations C L O S E
G A T R R R E Y E N I P S A K R K C K I L N O G S S C E D P W O A A O U O R D O R R A D T K O H R I L L TymonTymon ParkPark Location of Known Basements P A P A R R K R H K O V H Y IL A A I I W D E L P L W A L Weir R A School N K E V U W H E N O G I T R A L N E R V P S O R L U A ARK K A R D I V O D Y A C E S K IEW N O E R O O A C IS R U K P R E L E T HIL R RK T PA P A R
K H I L L
T R E G E R P E A E ST R N WE K LL KHI E AR U P P T N YM B A E O R N Assumed Location of Basements V E V I K L L A LE H G G I RO A L V L E R W
D A
Y
Tymon Sports Ground C L E O Castle IV S R E D D L A L P E I I O H N V I R 30.2m³30.2m³ R H K E R 30.2m³30.2m³ C E R T T E FB A R D L 30.2m³30.2m³ I R G P E E L E E I H E D A L V T G P O L R I N S R A K O R V O R B V K A N E EP IR M D O D E C Y R R T R T H M IV V I V I Y E E T E W W FP06FP06 E L I FP06FP06 Sports Ground A W V FP06FP06 L N H L C HI R RK I PA B Structural Condition Assessment Sports Ground
ISE TY R T MON R VIL E B LE E IR DRIV TY ST P C E MO T E A H NV H W R V IL (Previously Reported/Graded Defects) K I L E E E L W A IL V KH L EN AR A UE P W N
LL Church HI RK PA TS Sports Ground EIGH OD H DWO RE D O R L IV D E B E L G G A L R D R A B D R E E T E T E O L S D Y G U A E W M D A N O R W P O B N D A ILL I E O R R H V L K C D A R K D A R H A N O H A R E A V O I P E D L IE W R L D W E R I W V TY O M E Hazelbrook T A O O H NV L Structural Condition - Grade 5 D D H O IL R C LE L E I D I R V V I CR V D E E S N B C I A E E NT O W B O M IR R Y C T R HV E IE P W S I D T N W C E O H 73.7m³73.7m³ O U T R IG 73.7m³73.7m³ R O T E 73.7m³73.7m³ E H E D
C R W L W E A E A I S W W R V C Y H E E N E T C S D N ' R S R 62.2m³62.2m³ T T E I ISE W E P B 62.2m³62.2m³ R E R E O H A P 62.2m³62.2m³ N T T O R A N D HP05HP05 E D K R A HP05HP05 C K P S O HP05HP05 A E C R R Car Park R TH L K Structural Condition - Grade 4 A C E O W H E RISE THE E S A R E Y T E IN P OOD EDW R S T H IG E H E DRIV
S
L
L
I
H K OD R N WO E RED A P E E E R E IS G R R T
Catchment Deficiency Reference Key PA W R E KH I ILL Shopping Centre V H
C
R I School D
B A AD O PARKHILL RO R
H T R
R O W O N E I A RE V N D D 26.5m³26.5m³ W OO H 26.5m³26.5m³O D AV C 26.5m³26.5m³M E T N R YM Y U I O TYMONTYMON NORTHNORTH E NVILL T B E TYMONTYMON NORTHNORTH NUE CRES VE CE TYMONTYMON NORTHNORTH A NT Hydraulic Deficiency Reference No.
K
R
A
P OD E EDWO AL R TYM E Tymon Castle D ONV L HP 1 E ILLE LA TH WN L I
V
N
O R O M S Y T A T A D ON GU URT S Belgard Heights D CO G WOO RO RED V E
T H E Structural Deficiency Reference No.
C O SD095RSD095R T ALK U UR OD W SD095RSD095R CO EDWO R OD R SD095RSD095R T WO RED MA YBER SCD 1 RY ROA T D H T E R
M U
E O A B C D E O L E G L W AD O L A R I S R V
D N
O R O M Tymon Park A Y RY T D YBER MA D CSO Deficiency Reference No. ROA
Y BERR MAY CSO 1
REDW M OOD A D M YB ER A O A R O L Y Y R (Hydraulic or Environmental) D B B TYM ON NORTH E ONV TYM E VIEW ILLE C R BIR OU L CHVIE RT A G R W C V A LOS ROAD E Y E ILLE N R ROAD TYMONV U D Y E RR E P AYB S R M A T O S R AONGUS A RO U D K AD G N C O RESCE A ST NT AO NG US L FP08FP08 T Y A M W FP08FP08 O N T FP08FP08 N S M50M50
NO M50M50 RT M50M50 H G RO Operational Deficiency Reference No. VE OP 1
Tymon Park
Broomhill
D A Business O GEN 1 R General Deficiency Reference No.
E T Park A T S E Greenhills
N W O T Industrial Estate S K O O C
ST Belgard A Hydraulic Deficiency Reference No. ON GU S Industrial CO UR T FP 1 Estate
ST
AO NG U (In relation to river channel) S GR EE W N E S L T OMHIL E BRO R R N OA D T Y M O N P A R K W A Y NO RT H 2011 Future Development Key
N E E R G S U G N O A BR OOM T HIL S 28m³28m³ L RO 28m³28m³ AD 28m³28m³ B
R
O
O
M H T I N Zoned Residential Land L CE L S RE C US S G T N AO
A T UE O S EN N AV G ST U IR S F
P A R K HP17HP17
B Industrial Estate
R
O
O
M D
H R
I I L V T L E Y
M D Library O A N O R L S A U N E G N O A Zoned Science/Technology Parks/Land T S
Shopping Centre
RACE TER MHILL BROO
D
B A
E O
L R
G
A S R L D E L OS I CL T R ILL Y OMH H M O RO O B N N A 27.8m³27.8m³ HP18HP18 E D HP18HP18 27.8m³27.8m³ E HP18HP18 27.8m³27.8m³ R G NO R R TH School O Castletymon A R D OAD HibernianHibernian IndustrialIndustrial EstateEstate Court Zoned Industrial Land
School
T YM O N N OR TH
LA W N
E NU VE D A ON SEC
COLBERT'S FORT Zoned Commercial Land BELG T YM FP09FP09 O N FP09FP09
Colberts AR FP09FP09 School D
40.4m³40.4m³ Fort RO N 40.4m³40.4m³ O R 40.4m³40.4m³ A T D H
E NU G AVE A R A D
I E R N T B S O R K N O R
O A P M H H
I T L R L O
N
N O ND CO M SE Y HP15HP15 T
T E Zoned Land for Mixed Development
R R Greenhills
A
C
E Business Park
C
O R O O K A S D T
O
W N Sports Centre
R
O
A
D
Tennis Grounds Sports Ground AIRT ON R OAD
Church Recently Completed Developments
D ROA
ON AirtonAirtonAIRT RoadRoad
Hibernian Industrial Estate UE EN AV
C
O
O
K IRD TH S D School T A 2011 Development Reference O O SD088RSD088R W R SD088RSD088R National Basketball N S SD088RSD088R L
E L
S I BalrotheryBalrothery
T H BalrotheryBalrothery Arena A N BalrotheryBalrothery
T E
E E
R
R G
O
A
D
A
I School R
T
O
N
Car
Park BancroftBancroft ParkPark Castle BancroftBancroft ParkPark Lawns 2011 100 year ARI Flood Extent
C
L
O
S
E
Car Park Notes
Playground 1. Results are based on assessment of sewer system Car
Park
Car Park Balrothery Estate 42.9m³42.9m³ Castle Park under 1, 2, 5, 10, 20, 30, 50 and 100 year return period E ENU 42.9m³42.9m³ AV
RTH VERED BY 1:1000 MAPPING FOU rainfall events.
NT CE ES FP07FP07 CR FP07FP07 FT FP07FP07 CRO N HP10HP10 BA HP10HP10 Institute Of Technology 2. For colour coding, flooding takes priority over
BELG
AR
D BelgardBelgard RoadRoad Car Park surcharging.
MOUNT BROOK
A V E N U E 3. Where pipe is not predicted to surcharge or flood for
R
O
A
D SE B LO A C N C B FT R O A R O C School N AN F C B T R
O F the return periods analysed, the pipe has not been labeled. T
D Castle Park
A
O 73.6m³73.6m³ R
Tallaght 4. Levels referenced in metres to Ordnance Survey R ROAD O A D Apts E ALLAGHT AVENU T Hospital G HP13HP13 61.7m³61.7m³ R HP13HP13 61.7m³61.7m³ O 61.7m³61.7m³ NCROFT V A HP13HP13 B E Halting Datum, which is Mean Sea Level at Malin Head,
C Site O B
O R
K O HP14HP14 S S
O HP14HP14 L T
L
K O HP14HP14 I
W M N H
O N
E U
E N
R Bancroft T Car G Co. Donegal (1970 Adjustment). Court Park SD066RSD066R Glenview Lawns SD066RSD066R LAWNS Alderwood Green 5. All dimensions given in metric units. Car Park W A Y TH R B NO E L G A R BA D NC R S O E Q FT OV U P GR A A Project R R K RE E A U E Glenview SQ A S PARK T FT T CRO Park BANCROF BAN
B AN D C AR RO LG F E T B AD PA T RO R LLAGH K TA
TON ROAD BLESSING
B E GREATER DUBLIN STRATEGIC DRAINAGE STUDY L AD A G RO L A D RK R A E P B R D A W N R O C O O Church R A D O D F
B OFT T G C L BAN CR E R R O B S O E O E E S N K L IN A S G G D T A O T R O W AD D N RO N
R O SS S A A W Q D Y P U B A HT Y A RK AG R 116.8m³116.8m³ W PA LL E HP13HP13 T VIE A 116.8m³116.8m³ LAGH GLEN T HP13HP13 AL T 116.8m³116.8m³ HP13HP13 H ORT E N A RE QUA S S T ARD ELG N Catchment B O GT SIN ES BL
Priory G
L
E
N
V
I
E
W
PODDLE RIVER P
D A A R
O K
R
Springfield
D OA Burial Ground N R S TO L G L IN I AY SS W E H BL OWN N KST E O E CO R
G
Car Park r Dodder Parish Hall Rive SEWER CATCHMENT Glenview V I R
G I Park N I 00 0.50.5 11 A Moynihan
00 0.50.5 11
H SD067RSD067R
E SD067RSD067R Court 00 0.50.5 11 I SD067RSD067R G H D H OA T T R S GH LA AL T S B PAS E Y Title B L GHT G A ALL A T R Church
D
ROAD S TALLAGHT
Q
U
A
R
E
T EE TR W S
E
S
T
Car PHASE 3 - 2011 Hydraulic Performance
Park Car Park MAIN
S HT EIG H S PAS BY HT T LAG EE TAL TR H S IG IVE H DR Drg. No. A GINI VIR
EW NVI GLE
O
L GDSDS/NE02057/S1005/P3-002/TILE 1 Car D
Park
Hotel
B
TALLAGHTTALLAGHT A Car Park TALLAGHTTALLAGHT W TS TALLAGHTTALLAGHT N H IG HE SD062RSD062R Bank SD062RSD062R
R
O Bank IA N A A RGI I V V D O
N
M Westpark O Drawn SD057RSD057R R Chk'd SD057RSD057R E
SD057RSD057R R O
A
D
AD RO EG PD B LF N kilometreskilometresAVO
kilometreskilometresB O kilometreskilometresL B R
O O K Approved
B Shopping O
L
B
T
T R S
S AD O
A Centre A RO
Village O E
E K
JS AVONBEG
E
E Green D R
R R
A A I E
V S U
U LO
E C
Q Q
S S
D D
R R
A A
G G
L L
E E B B Scale REVISION N.T.S.
Date A Ordnance Survey Ireland Licence Number EN5001 Copyrightightight GovernmentGovernmentGovernment ofofof Ireland.Ireland.Ireland. 12.01.04
ER OW Factory L
AD RO
T UN Legend RK O PA M LY AL use B Ho ay S kw AA ar N P Industrial S B ND A WLA L NE L Estate Y M
O U AD N RO T
IVE DR
Car Park Wastewater Treatment Works
E
V
I
R
D
S Industrial
D
N A
L Estate W
E
N
D
A
O
R
W
E Car Park N SD004ISD004I County Council Boundaries Westway Centre
Crosslands Business Park
R
O A D
B A L AD L County Council Boundaries Car Park RO Y M
O S U ND LA N W T E N A V Western E N U Parkway E
Business Park Rising Main (Coloured as sewer) Industrial Estate Car Park AS NA
ER W LO Sewer not included in hydraulic model
AD RO AD RO AD RO Mound
NT OU YM LL BA Direction of Flow (on sewer line) Business T Centre UN O Calmount LM CA Business Park
C
A
L
M
O
U
N
T Hotel A River/Watercourse V
E
N
U
E
Tower Culverted River/Watercourse
S T B A L LY M O U N J T O S E P D H A 'S O R Ballymount Park 1:1000 OS Grid Line Boundaries
AD O R R ' S O ES A M D S A NAA J R T O S AD
ST OAD B R RI DG E U T P 'S P D 1:5000 OS Grid Line Boundaries E R R I VE
T EN C ES CR Combined Sewer Overflow S L 'S L Y I N H O N H B T E A N L E A L R Y G M
O U N T T S
BA B L E LY L M G O A U N R T Foul/Combined Pumping Station D
D
A R O O R A 'S D A B M U L O C T S
R T Newlands Cross Cemetery O A N Golf Course D E C
S
E
R C Foul/Combined Bifurcation A V E N U E
S ' U N PP A E D R N
E
R
B
T
S Foul/Combined Apex Manhole
1
.
8
3
m
F B
F A LL YM OU NT
RO AD U PP ER Kingswood Castle Pa RK rk Foul/Combined Flow Management Chamber A w ST E P ay Recycling Centre UND R B MO u UN sin MALACHY'S D es s C 1.83m FF en tre Industrial Estate K PAR ORE UNM D T N U E N C D S E R C
K AR Storm Water Overflow to Foul/Combined P RE D MO U UN T N D N M E O C R S E E R P C A R K
F 1.83m F S' MOOREENARUGGAN Y N
D O H A T 80.19 O N R A
'S Storm Water Pumping Station N K A T R D S PA N E Westgate Business R B Park FF 1.83m
E OR NM DU T Storm Water Bifurcation S
Ballymount Park
Indusrial Estate S L
L 80.17 I
H
N
E
E Storm Water Apex Manhole
R
G E OV GR
T IBR AD
Westgate DE 1 29.5m³29.5m³
N
. 8 29.5m³29.5m³
3 29.5m³29.5m³
m Business Park
F F
D D R A E IVE Storm Water Flow Management Chamber R O
O R M D UN U D N M O R E
E G E U S N R O E O L V V C A E
E D S L O IE L HP22HP22
F C S
H HP22HP22 ' S
HP22HP22 S A
E
M 26.8m³26.8m³ A E 26.8m³26.8m³ J U 26.8m³26.8m³ N E E V U V O ND N A R
U D W A G
N A F
O D L O R R
E S T T S 80.24 E L R A T
O W S F N 1 .83m E F E Flooding Performance Key F Convent K A L I K N AS E E D R HF T O IE N D U A M L D O R N M Y B U I PA LL N D T RK BA F E O E R E D S A T E
K B ALL YM OU NT 79.62 AVE Flooding greater than 25m3 Volume for N UE
E
U
N
E
V
E A
U N E W N V AL A A N V C U L T L Y A A O S V S E S 5yr Return Period Event (Volume m3) H E E F N S 1 I U . E O 8 L E L 3 D C m D R E I F V E S F T E U S O O L N L L C C A ST UND W E R UE FO N VE A 'S EL M ST
79.54 D L School IE E A S F G S I H H O
F L S I R A E R LD LU C D GN O R A C IV Q E UI D L Flooding less than 25m3 Volume for 5yr L A A O AV R EN UE F O R E S W T A A L V N E ST U N F T U F D E A R U S IV D Return Period Event H E N J F AM IE O ES LD T 'S
C L T O N S E U RO O AD U M N Y D L L A B
E
S G LE O N
L D E O S C O S O
Y L L LU C M V O A GN A N O AQ N D UI O L N 79.65 L R A E Church L CL G O Modelled Manhole does not flood for 5 S E
'S C 1.83m D R L FF O A R
A S E F O AV U D R B E R O E N N N IV R U I VE E E E E F O V S R A T G
L L W A year Return Period Event A H L NU N T E R A V C O N LO N O A Y S T M T R E S G
T Church K U R N A T P E S PL E D M R E H T C IV T E Y L NA S IM College N L EK L IL Fire Station I N H N E E R HA G LL
A VE NU GR E OV E E S Car Park O L T All Historically Reported Flooding Incidents C S E T R U O N F F L O A R E E W U S N T
E Tymon Park V N A A E V E E R N U G E caused by Hydraulic Overloading
80.58 ROAD UNT BALLYMO
81.46
N E A U V EN L AV Y S F O R W E E S ST K T E I Lis-na-Creive R L T N M School S G P E A E R AR UR S R E K PP H E W I O C O N A K E F Y G D U Foul/Combined Hydraulic Performance Key A E R
A V E L N IM T U E Y E NO K N W IL H E N AL ST L E SE PA R L O R N C K PA UE RK OG W SH AY MA KIL S Y L V A D N A O R S Y C U A D N M R Limekiln Green D O I R V E E D A Foul/Combined Sewer surcharges for 1 C L RO O S K E R PA A EE V R E T N
U 1.83m FF TY E N ON E IV HA R LL D
P AR T or 2 year return period events K S E R O D F 82.34 R IV E
T THR R EE EE E P L AR ROC A K K D RO CLOSE K A S D KILM Tennis I ASHOGUE GROVE K R S R A L A L P M I E A H Ground R T O N M E E CA Y R S G 84.02 34.8m³34.8m³ Foul/Combined Sewer floods for 30 year 34.8m³34.8m³ E E NU 34.8m³34.8m³ U E AV N RE T E MO A TR V CA M EE LIM A SY A PA EKILN R RK ROA IS R D Tennis Grounds K OA D Kingswood
U return period or less. N Heights D
W A LK
S Y S C Y HP12HP12 A C HP12HP12 M A HP12HP12 LIM O E M KILN R O E E R V S E I Y R D L RO V Car Park AD A
N
N L E I U K N E E
V M T A I L K I S D R
R A E M I U V N A 86.17 E VE T A K Foul/Combined Sewer does not surcharge S D I R A A D CW O M R R A I T V
E
TA M Tymon Park for 1 or 2 year return period events and AR IS K CL TH O E SE
TH E does not flood for a 30 year return period D OA R PA RK
E GA U R N TH E V A event or below. (eg 1,2,5,10,20) B E L K Y G AR A A EP W R E K D R IS T R A M TH A E T K Kilnamanagh IS R TA A T M M HE A A G R T Estate R IS EE K N
K R DA A K L P R E A E P H T E L T S A r C FP05FP05le Rive M Podd A L FP05FP05 V E E FP05FP05 N U Lake E
E L A E D T T T IV R N H A Sports Ground U E M R O D A O A D E R D M A Y S I L S O L O K R A L Storm System Hydraulic Performance Key B C P AR N K A
V
E L
U Y
N S
E
V
A E L T T EL T HE S M H A C E C C A S C O M T O E U L L U H TH E E R T E R T P T 84.2m³84.2m³ AR 84.2m³84.2m³ K 84.2m³84.2m³ Belgard Castle D A L D T E H O E O W K S IN G N G I S K HP06HP06 Lake W O HP06HP06 O C HP06HP06 Storm Sewer surcharges for 1 D O G U R E R O I V T V E R D Kingswood Heights
T A RT M U or 2 year return period events O Tallaght T A K C Lake H R S E E RI E KI C IS A V H N R M T G E K A O S S T Theatre R W C H E L G O EN E M O T I C D G A H S T T S LE FB
N W A L Sports Ground
C E D L H R O T IV S GREENHILLSGREENHILLS E E GREENHILLSGREENHILLS K GREENHILLSGREENHILLS E S S RI O A L M C A T T A M A Storm Sewer floods for 30 year R IS K T V H K E IE AR G W P
R E O H V T E TH E
D A O return period or less. v R k 0 1 SK RI MA TA E L M C A S E T U L N N E r E AW e V L T iv A YM O R E R e S I N l SE d O d L o C P
T PAR H KVIEW E T Playground A Storm Sewer does not surcharge L M E IL A H H R T E K I Tymon Park S AR S I P K R R U G S Kilnamanagh R HB O R V O Estate E W OK A LA R L NE K O AD for 1or 2 year return period events and E L A E M V H C T A E S N T U L E E E E K S L O M R L C A Tymon Park C A P S E C T E L L R O E T S P does not flood for a 30 year return period E G A R R E K E N
E H Sports Ground T D B O E O L W G S A G S R IN L D K L I H N event or below. (eg 1,2,5,10,20) E
E
R
G PAR KVIEW
E L M C P A A S R T L K E H E G B I OS R E L L E L L C G ILL E A KH N R R D PA C Tymon Park Important Hydraulic Considerations L O S E
G A T R R R E Y E N I P S A K R K C K I L N O G S S E D C W A O P O O U A D O R R R A D T K O R H I L L TymonTymon ParkPark FP10FP10 P Location of Known Basements A P A R R K R H K O V H Y IL A A I I W D E L P L W A L Weir R A School N K E V U W H E N O G I T R A L N E R V S O R L U A PA K R I RK A D C E S V O D Y A K IE N O E R W O O A C IS R U K P R E L E T HIL R RK T PA P A R
K H I L L
T R E G E R P E A E ST R N WE K LL KHI E AR U P P T N YM A E O B R N V V Assumed Location of Basements E I K L A LE L H G G R IL OV A L E R W
D A
Y
Tymon Sports Ground C L E O Castle IV S R E D D L A L P E I I O H N V I R R H K E R C E R T T E FB A R R D L I G P E E L 37.5m³37.5m³
E E I H E D L 37.5m³37.5m³ P A V T G O L I N 37.5m³37.5m³ A R S R K O R V O R B V K A N P I M E D E R D R E C O Y R T T H M R IV V I V E I Y E T E W W
E L I A Sports Ground W V L N H L C HI R RK I PA B Structural Condition Assessment Sports Ground FP06FP06 E TY RIS T MON R VIL E B LE E IR DRIV TY ST P C E MO T E A H NV H W R V I 41.2m³41.2m³ L (Previously Reported/Graded Defects) K I L E E E 41.2m³41.2m³ W A ILL V 41.2m³41.2m³
KH L EN AR A UE P W N
LL Church HI RK A TS Sports Ground P EIGH OD H DWO RE D O R L IV D E B E L G G A L R D R A B D R E E T E T E O L D Y G S U M A E W D A W N O R P B N O E HP19HP19 D A L IL IR R O V L HP19HP19 H C D A K K A R D A N HP19HP19 R H O H A R E V O A I P E L W D IE R L D W E R I W O V T Y E T O M Hazelbrook A H O NV L Structural Condition - Grade 5 D H O D I C LL L E R E I D R V I I V CR V D E N E B S I C A E E NT O W B O M IR R Y CH T R VI E E P W S D IN C T W O E U H O G T RT I R O E E H E D
85m³85m³ C R W L W A 85m³85m³ E E A I W 85m³85m³ W S R V C Y E H E E N T D C S N ' R S I R 70.6m³70.6m³ T T ISE W E E P E B 70.6m³70.6m³ R R E O H A P 70.6m³70.6m³ N T T O R A N D E D K R A C K P S O A E C R Car Park R TH R L K Structural Condition - Grade 4 A C O HP05HP05 W
HE E ISE E S R HP05HP05 A TH E R E HP05HP05 Y T E IN P OOD EDW R S T H IG E H E DRIV
S
L
L
I
H K OD R N WO E RED A P E E E R E IS G R R T
Catchment Deficiency Reference Key
PA W R E KH I ILL Shopping Centre V H
C
R I 34.3m³34.3m³School D B A 34.3m³34.3m³ O L ROAD 34.3m³34.3m³ R PARKHIL
H T R
R O W O N E I R A E V N DW D OO H O D AVE C M TYMONTYMON NORTHNORTH N TY U R MO Y E I NV TYMONTYMON NORTHNORTH ILLE T E B CR TYMONTYMON NORTHNORTH ENU ESC AV EN Hydraulic Deficiency Reference No. T
K
R
A
D P OO LE REDW Tymon Castle DA TYM E L HP 1 ON HE VILLE LA T WN L I
V
N
R O O M S Y T A T A D ON GU URT S Belgard Heights D CO G WOO RO RED V E
T H Structural Deficiency Reference No. E
C O K U RT WAL COU WOOD R RED SD095RSD095R OOD T DW SD095RSD095R E M R AY SCD 1 BER SD095RSD095R RY ROA T D H T E R
M U
E O A B C D E O L E G L W AD O L A R I S R V
D N
O R O M Tymon Park A Y Y RR T D AYBE M CSO Deficiency Reference No. D ROA
Y BERR MAY CSO 1
REDW M OOD A D M YB ER A O A RY O L Y (Hydraulic or Environmental) D R B B T ON NORTH E YMO TYM E VIE NVILLE R W BIR CO L CHVIE URT A G R W C V A LOS ROAD E Y E ILLE N R ROAD TYMONV U D Y E RR E P AYB S R M A T O S R AONGUS A RO U D K AD G N C O RESCE A ST NT AO NG US T L YM AW O N T N S FP08FP08 N FP08FP08 OR FP08FP08 M50M50 TH M50M50 G M50M50 R Operational Deficiency Reference No. O V OP 1 E
Tymon Park
Broomhill
D A Business O GEN 1 General Deficiency Reference No. R
E T Park A T S E Greenhills
N W O T Industrial Estate S K O O C
ST Hydraulic Deficiency Reference No. Belgard A ON GU S Industrial CO UR T FP 1 Estate
ST
AO NG (In relation to river channel) U S GR EE W N E S L T OMHIL E BRO R R N OA D T Y M O N P A R K W A Y NO RT H Future Development Key
N E E R G S U G N O BR A OO T MH S ILL RO AD 25.6m³25.6m³ B
R 25.6m³25.6m³
O 25.6m³25.6m³
O
M H T I N L 2011 Zoned Residential Land E L SC RE C US S G T ON A
E A ST NU O VE N A G ST U FIR S
P A R K HP17HP17
B Industrial Estate
R
O
O
M D
H R
I I L V T L E Y
M D Library O A N O R L S A U N E 25.2m³25.2m³ G 25.2m³25.2m³ N O 25.2m³25.2m³ A 2011 Zoned Science/Technology Parks/Land T S
Shopping Centre
RACE TER MHILL BROO
D
B A
E O L R HP26HP26 G
HP26HP26 A HP26HP26 R S L D E OS L CL I R HILL TY OM H M O BRO O N N A E D E
R
HP18HP18 35.9m³35.9m³ G NO R R HP18HP18 35.9m³35.9m³ TH School HP18HP18 35.9m³35.9m³ O Castletymon A RO D AD HibernianHibernian IndustrialIndustrial EstateEstate Court 2011 Zoned Industrial Land
School
T YM O N N OR TH
LA W N
E NU VE D A ON SEC
COLBERT'S FORT 2011 Zoned Commercial Land BELG T YM O N Colberts AR FP09FP09 School D FP09FP09
Fort RO N FP09FP09 O R 53m³53m³ A T D H 53m³53m³
E NU G AVE A R A D
I E R N T B S O R K N O R O A
M P
H H I T L R L
O N
N O ND CO M HP15HP15 SE Y HP15HP15 T
T E 2011 Zoned Land for Mixed Development
R R Greenhills
A
C
E Business Park
C
O
R O
O K
S A
T D
O
W N Sports Centre
R
O
A
D
Tennis Grounds Sports Ground AIRT ON R 26.3m³26.3m³ OAD HP24HP24 Church Recently Completed Developments D ROA
ON AirtonAirtonAIRT RoadRoad
Hibernian Industrial Estate UE EN AV
C
O
O
K IRD TH S D School T A
O O
W R
N National Basketball S
SD088RSD088R 2011 Development Reference L
E L
S SD088RSD088R I BalrotheryBalrothery T H SD088RSD088R Arena A BalrotheryBalrothery N
T E BalrotheryBalrothery
E E
R
R G
O
A
D
A
I School R
T
O
N
Car
Park Castle BancroftBancroft ParkPark Lawns 2031 100 year ARI Flood Extent C
L BancroftBancroft ParkPark
O
S
E
Car Park Notes
Playground 1. Results are based on assessment of sewer system
Car
Park Car Park under 1, 2, 5, 10, 20, 30, 50 and 100 year return period Balrothery Estate
Castle Park E 51m³51m³ U VEN 51m³51m³ A 51m³51m³
RTH FOU rainfall events. ERED BY 1:1000 MAPPING
NT CE ES CR
T HP10HP10 FP07FP07 OF HP10HP10 FP07FP07 NCR HP10HP10 FP07FP07 BA Institute Of
Technology 2. For colour coding, flooding takes priority over
BELG
AR D surcharging. BelgardBelgard RoadRoad Car Park
MOUNT BROOK
A V E N 3. Where pipe is not predicted to surcharge or flood for U E
R
O
A
D SE B LO A C N C B FT R O A R O C N N the return periods analysed, the pipe has not been labeled. School A F C B T R
O
F
T
D Castle Park
A
O 88.1m³88.1m³ R 4. Levels referenced in metres to Ordnance Survey Tallaght
R OAD O R A D Apts E ALLAGHT AVENU T Hospital G
R O Datum, which is Mean Sea Level at Malin Head, FT V ANCRO Halting B E 69.5m³69.5m³ C Site
69.5m³69.5m³ B O
O R
K O HP14HP14 S S
O T HP14HP14 L L
K O HP14HP14 I
W M N H
O N E U Co. Donegal (1970 Adjustment).
E N
R HP13HP13 Bancroft T Car G HP13HP13 Court Park
Glenview Lawns LAWNS Alderwood SD066RSD066R 5. All dimensions given in metric units. Green
Car Park W A Y TH OR B N E L G A R BA D NC R S O E Q F V Project T RO U P G A AR R K RE E A U E Glenview SQ A S PARK T T OF Park OFT CR BANCR BAN B AN D C R RO GA F EL T B D PA ROA R LAGHT K TAL
TON ROAD BLESSING GREATER DUBLIN STRATEGIC DRAINAGE STUDY B
E L AD A G RO L A D RK R A E P B R D A W N R O C O O Church R A D O D F
B OFT T G C L BAN CR E R R O B S O E O E E S N K L IN A S G G D T A O T R O W AD D N RO N
R O SS S A A W Q D Y P U B A HT Y A K AG R PAR L IEW AL E AGHT LENV T LL G TA
H ORT E N A RE A S HP13HP13 137m³137m³ U SQ T Catchment HP13HP13 137m³137m³ D GAR HP13HP13 137m³137m³ EL B ON GT SIN ES BL
Priory G
L
E
N
V
I E PODDLE RIVER W
P
D A A R
O K
R
Springfield
D OA Burial Ground N R S TO L G L IN I Y SS A E H W BL N WN STO E OK E CO R
G
Car Park odder Parish Hall River D SEWER CATCHMENT
Glenview
V I R 00 0.50.5 11 G I Park N 00 0.50.5 11 I A Moynihan
00 0.50.5 11
H SD067RSD067R E Court I SD067RSD067R G SD067RSD067R H AD H O T R T HT S LAG TAL Title S B PAS E Y T B L H AG G L TAL A R Church
D
ROAD S TALLAGHT
Q
U
A
R
E
T EE TR W S
E
S T PHASE 3 - 2031 Hydraulic Performance Car
Park Car Park MAIN
S HT EIG H S PAS BY HT LAG ET AL RE T ST Drg. No. IGH IVE H DR A GINI VIR
EW NVI GLE
O
L Car D GDSDS/NE02057/S1005/P3-003/TILE 1
Park
Hotel
B
A Car Park
W TS TALLAGHTTALLAGHT H N G TALLAGHTTALLAGHT EI TALLAGHTTALLAGHT H
Bank SD062RSD062R R
O SD062RSD062R Bank IA A A SD062RSD062R N RGI I V V D O N Drawn M Chk'd
Westpark O
R
E
R SD057RSD057R O SD057RSD057R A SD057RSD057R D PD AD LF RO EG NB kilometreskilometresAVO B O
L B R
O Approved O
K
B Shopping O
L
B
T
T R S
S O JS
AD
A Centre A RO
Village O E
E K
ONBEG
AV E
E D R
R R A
A I
V U U
E
Q Q
S S
D D
R R
A A
G G
L L E
E Scale REVISION B B N.T.S.
Date A Ordnance Survey Ireland Licence Number EN5001 Copyrightightight GovernmentGovernmentGovernment ofofof Ireland.Ireland.Ireland. 12.01.04