CLOSING DATE FOR PUBLIC CONSULTATION 19th MAY 2021
Lot 2 – Munster Bridges Term Maintenance Contract No. 3 Culvert Inverts – Group 3 (Derryreag Culvert), Natura Impact Statement Transport Infrastructure Ireland
19/03/2021
Notice
This document and its contents have been prepared and are intended solely as information for Transport Infrastructure Ireland and use in relation to the proposed project. WS Atkins Ireland Limited assumes no responsibility to any other party in respect of or arising out of or in connection with this document and/or its contents. This document has 54 pages including the cover.
Document history Origin- Revision Purpose description ated Checked Reviewed Author-ised Date Rev 0 Draft for Comment NS NS POD MJ 16/07/2020 Rev 1 For Issue NS NS POD MJ 13/11/2020 Rev 2 Minor Amendments – For NS NS POD MJ 09/02/2021 Issue Rev 3 Minor Amendments – For NS NS POD MJ 19/03/2021 Issue
Client signoff Client Transport Infrastructure Ireland Project Lot 2 – Munster Bridges Term Maintenance Contract No. 3 Job number 5162555
Client signature / date
5162555DG0025 | 3 | 19/03/2021 Atkins | 5162555DG0025 rev 3 - Derryreag NIS.docx Page ii of 54
Contents
Chapter Page 1. Introduction 1 1.1. Project Context 1 1.2. Project Description 2 2. Scope of Study 8 2.1. Legislative Context 8 2.2. Appropriate Assessment Process 8 3. Methods 10 3.1. Legislation & Guidance Documents 10 3.2. Desk Study 10 3.3. Site Visit 11 3.4. Consultation 11 3.5. Statement of Authority 11 4. Existing Environment 13 4.1. Desktop Review 13 4.2. Site Visit 13 5. Screening for Appropriate Assessment 16 5.1. Connectivity of Proposed Project to European Sites 16 5.2. Brief Description of European sites 21 6. Appropriate Assessment 27 6.1. Introduction 27 6.2. Impact Evaluation 27 6.3. Mitigation Measures 38 7. Conclusions 42 References 44
Appendices 45 Appendix A. Design Detail 46 Appendix B. Contractor Method Statement 47 Appendix C. Hydraulic Assessment 48 Appendix D. Section 50 Consent 49
Tables Table 1-1 - Grouping of Structures in Munster 1 Table 5-1 - SACs within potential ZoI of the proposed project. 17 Table 5-2 - SPAs within potential ZoI of the proposed project. 18 Table 5-3 - Qualifying interests of the SAC within the ZoI of the proposed project. 24 Table 6-1 - Site-specific conservation objectives for QIs within ZoI of the proposed project. 30
5162555DG0025 | 3 | 19/03/2021 Atkins | 5162555DG0025 rev 3 - Derryreag NIS.docx Page iii of 54
Figures Figure 1-1 – Dam set up for water management 3 Figure 1-2 - Site Location 7 Figure 2-1 - Appropriate Assessment Process (Source: DEHLG, 2009). 9 Figure 5-1 – SACs within potential ZoI of the proposed project. 19 Figure 5-2 - SPAs within potential ZoI of the proposed project 20
5162555DG0025 | 3 | 19/03/2021 Atkins | 5162555DG0025 rev 3 - Derryreag NIS.docx Page iv of 54
1. Introduction
Atkins have been commissioned by Transport Infrastructure Ireland (TII) to install concrete inverts at three culvert structures in Co. Kerry; Killaha Culvert (KY-N22-024.00) and Curraglass Culvert (KY-N22-025.00), Derryreag Culvert (KY-N22-028.00).
The scope of this Natura Impact Statement (NIS) is for the proposed project at Derryreag Culvert. The proposed project falls under the TII Munster Bridges Term Maintenance Contract No. 3. 1.1. Project Context
The Eirspan Bridge Management System covers all aspects of bridge management including routine maintenance. Over the past number of years TII have undertaken routine bridge maintenance contracts under Bridge Term Maintenance Contracts. A TII Bridges Term Maintenance Contract is currently being delivered for all National Road Bridges in Munster.
Under the Munster Bridges Term Maintenance Contract No. 3, Atkins has been appointed as the Consultant to carry out services under the Contract such as bridge inspections and reporting, ecological assessment, production of contract documents, tender assessment, contract administration and site supervision. The Contract involves the annual inspection and undertaking of routine and reactive maintenance works to all National Road Bridges across all counties in the Munster region, namely counties Cork (City & County), Kerry, Waterford, Tipperary, Limerick and Clare. This contract will run until 2021, where it is intended to carry out annual routine maintenance work between circa June and December in each year. All works from each year will be subject to the Appropriate Assessment (AA) process.
It is proposed to install concrete inverts to all existing corrugated steel culverts under National Roads in Munster. These culverts were installed during the 1970s and 80s. The culverts now show signs of significant corrosion and to maintain their structural integrity, a concrete invert liner is to be installed. Under the current Bridges Routine Term Maintenance Contract TII have selected 5 corrugated steel culverts for concrete invert lining. These culverts are presented in Table 1-1 below.
The culverts proposed for concrete invert installation initially underwent Screening for Appropriate Assessment in 2018. TII determined that likely significant effects to European sites, in view of their conservation objectives, could not be ruled out and thus required Appropriate Assessment. Thus, the proposed concrete invert installation at Derryreag Culvert requires further assessment.
For the purposes of assessment, the 5 culverts in Munster have been grouped according to their potential zone of influence and location within Water Framework Directive (WFD) catchments. Using this system, 3 groups were established. These groups are detailed in Table 1-1. Where European sites are located within the potential zone of influence of more than one grouping, the potential for cumulative impacts shall also be considered. Derryreag Culvert is assigned to Group 3, which is located in the Laune – Maine – Dingle Bay WFD catchment.
Table 1-1 - Grouping of Structures in Munster Group No. Structure Name & No. WFD Catchment Group 1 Knockakip Culvert (KY-N21-016.00) Tralee Bay - Feale Group 2 Anner Bridge (TS-N24-007.00) Suir Group 3 Killaha Culvert (KY-N22-024.00) Laune – Maine – Dingle Bay Curraglass Culvert (KY-N22-025.00) Derryreag Culvert (KY-N22-028.00)
5162555DG0025 | 3 | 19/03/2021 Atkins | 5162555DG0025 rev 3 - Derryreag NIS.docx Page 1 of 54
1.2. Project Description
The proposed project comprises the provision of a concrete lining and associated instream works to the invert of Derryreag Culvert (KY-N22-028.00), Co. Kerry. Derryreag Culvert is located on the N22, between Coom and west of Ballyvourney. Derryreag Culvert is a single span structure situated on the Derryreag stream, a tributary of the River Flesk. Derryreag Culvert is located approximately 150m upstream of the River Flesk.
This corrugated steel structure has been identified as having durability and structural issues as a result of the erosion of previous bitumen protection linings and progressive corrosion of the metal particularly in the lower region. The purpose of the concrete invert is to mitigate further corrosion and section loss to the invert of the culvert and to restore and maintain it structural integrity.
It should be noted that the scope of the proposed project is the replacement of the existing concrete lining at the base of the culvert. Given engineering constraints for the structure, it is not feasible to retrofit a ledge for mammal passage within the existing structure. The design and installation of an entirely new structure would be required for this to be achieved, which is outside the scope of the proposed project.
The culvert will be dammed upstream and downstream within 10m of the culvert using double lined sand bags, filled with clean sand, tied and wrapped in heavy gauge polyethene.
There will be three dams erected in the stream; dam 1 upstream of the culvert and dam 2 &3 situated downstream of the culvert (Figure 1-1). Dam 2 and 3 will be erected first, 300mm high on the stream bed. Dam 1 will then be erected, and the stream flow pumped downstream of dam 3. The intake will be fitted with a filter to ensure no fish enter the pipeline. The outfall pipeline will be fitted with a silt sock. This will dissipate flow and prevent scour of the river bed. The stream between dam 1 & 2 will be electro fished and the fish placed in the pool created between dam 2 and 3. On completion of the electro fishing dam 2 will be raised to full height and a silt fence will be erected between dam 2 and dam 3 and a second silt fence will be erected just upstream of dam 3. The water between dam 1 and dam 2 will be pumped into the pooled area between dam 2 and dam 3 in advance of the silt fences. A shallow sump will be excavated (or naturally occurring) in the stream bed upstream of dam 2 to catch surface water and cleaning water from power washing the culvert. The collected water in the sump will be pumped downstream between dam 2 and dam 3 and discharge in advance of the silt fences.
Large boulders will be removed from the riverbed prior to placing a heavy-duty geotextile on the river substrate and stored within the works area for reinstatement on completion of the works. A hardstanding working platform will be placed over the geotextile upstream and downstream of the culvert. The working platform will consist of clean gravel/ crushed rock (typically 250mm thick depending on the riverbed ground conditions). Existing stream bed material within the metal culvert will be captured and stored within the works area for reinstatement on completion of the concrete lining. The corrugated steel culvert will be cleaned by power washing and hand-held mechanical tools such as wire brushing and grinding. The power washing water will be collected in a sump within the works area (i.e. upstream of dam 2) and discharged through the double silt fencing and dam 3 before entering the downstream waters. Arisings from the corrugated metal culvert cleaning will be collected within the culvert and disposed off-site to a licensed waste facility. Prior to placement of the lining, the corrugated steel culvert invert area to be lined will be primed with anti-corrosion primer, prior to placing 150mm thick (nominal) reinforced (stainless steel) concrete to circa one-third of the culvert height. On completion of the culvert lining works the temporary working platform and geotextile will be removed. The culvert bed will be reinstated with stream bed material that was removed from the culvert prior to the works and the stream bed will be regraded locally to the culvert ends with clean natural gravels to realign the culvert and stream bed levels.
The drawing detail of the proposed works is included in Appendix A.
The Contractor’s method statement details how the works will be carried out and the works sequence. The Contractor’s method statement is included in Appendix B and is summarised in the text below along with general specifications of the works from the contract’s Works Requirements Specifications.
5162555DG0025 | 3 | 19/03/2021 Atkins | 5162555DG0025 rev 3 - Derryreag NIS.docx Page 2 of 54
Figure 1-1 – Dam set up for water management
1.2.1. Working Methods
Under the Munster Bridges Term Maintenance Contract No. 3, the works are carried out according to the Works Requirements Specifications. This details the general specifications of the works, which includes the installation of concrete inverts to corrugated structures:-
“The contractor shall remove all silt/debris and deposit build-ups from the structure ensuring appropriate downstream silt containment measures are in place. The existing invert shall be prepared for the installation of the sprayed concrete invert (HTR-DR 1006 & 1007) by cleaning back to bright steel. Removal of all detrimental contamination and corrosion products using handheld tools to produce a generally bright appearance overall. The surfaces shall be free of embedded abrasive particles and corrosion products when viewed through a x10 illuminated magnifying glass. The invert shall then be coated with the corrosion inhibitor Galvafroid manufactured by Fosroc. An anti-corrosion steel primer, Nitoprime Zincrich Plus by Fosroc, will be used to prime the steel”.
Fosroc were contacted regarding the above products proposed to be used during the installation of the concrete invert, as the Safety Data Sheets (SDS) for Galvafroid and Nitoprime Zincrich Plus categorise these products as ‘Aquatic Acute (1-H400) and Aquatic Chronic (1-H410)’. The SDS states that the products ‘contain a substance which is toxic to aquatic organisms and which may cause long-term adverse effects in the aquatic environment’. Fosroc confirmed that the danger to aquatic organisms arises from chlorinated paraffin, which is used as a plasticiser for the product when in a liquid state. These products will be applied during the installation of the concrete culvert in a dry working area. Once cured this material is bound in a polystyrene matrix and no longer mobile. Therefore, it is not regarded as a pollutant in its cured and solid state. These products are not epoxide resin-based coatings, which have been shown to potentially have adverse effects on the aquatic environment (Bell et al., 2020).
As stated in the Contract, existing deposits within the corrugated steel culvert will be removed and disposed of off-site, with the corrugated invert being cleaned back to bare steel using hand held tools. The exposed steel under the proposed concrete lining shall be treated with a corrosion inhibitor followed by an anti-corrosion steel primer. All shotcreting works shall be undertaken in accordance with ‘BS EN 14487: Sprayed Concrete – Execution’.
The installation of the culvert invert lining will be carried out during low water conditions in the months of July to September inclusive.
The Contractor’s method statement details how the works will be carried out in the works sequence. The Contractor’s method statement is included in Appendix B and is summarised in the text below.
5162555DG0025 | 3 | 19/03/2021 Atkins | 5162555DG0025 rev 3 - Derryreag NIS.docx Page 3 of 54
The proposed project is anticipated to last approximately 2 weeks. The existing carriageway over the culvert shall remain in service at all times.
Typical sequence of works
The sequence of proposed works is sourced from the contractor’s method statement and detailed below:
• In relation to existing bed gravels immediately upstream and downstream of structure: Existing river bed gravels shall be retained. Lay Terram 2000GT on existing riverbed gravel and construct temporary 300mm thick clean Class 6F granular capping over to form working platform. On completion of the works remove the granular working platform and geotextile. Supplement the existing gravels to IFI requirements local to the culvert ends.
• Existing stream bed material within culvert to be removed using shovels and wheel barrows. Kango hammer to be used where necessary.
• Concrete lining to be removed using a 1.5T excavator and rock breaker. Kango hammers and jack hammers will also be used where necessary.
• The excavator will be lowered into the culvert with a 100T crane that will be set up on the hard shoulder of the carriageway.
• Material that is to be taken out of the culvert will be put into 1T bags and lifted to roadside using the crane.
• Material to be disposed of in Conhor Construction Tip in Ballincollig.
• Power Washing of Culvert Lining: -
o The lining will be cleaned using a 25.000PSI Hydro Power Washer removing the loose / decayed material and exposing a clean Sa3 finish on the existing steel lining.
o The washing unit generator will be positioned in the works area on the road with the lance hose running down the bank into the mouth of the culvert.
o The washing will commence on upstream side, washing in the downstream direction.
o It is predicted that the power washing will remove all loose / decayed material but if required small angle grinders and wire brushes will be used to remove any small pockets that remain. This area will then be power washed again to ensure it is completely clean.
o A silt fence will be erected at the outfall of the culvert on the downstream side to ‘filter’ the resultant water from the washing of the steel lining.
o Arisings from the cleaning of the culvert lining will be collected within the culvert and disposed of off-site to a Conhor construction tip.
o A small pump will then be placed on the down – stream side to pump the water into the area between Dam 2 and Dam 3.
o A layer of silt fencing will be wrapped around the intake pipe of the pump as an additional filter layer and the outfall will have a de-watering bag placed around the end of hose.
• The invert shall then be coated with the corrosion inhibitor Galvafroid manufactured by Fosroc;
• An anti-corrosion steel primer, Nitoprime Zincrich Plus by Fosroc, will be used to prime the steel;
• Shotcreting: -
5162555DG0025 | 3 | 19/03/2021 Atkins | 5162555DG0025 rev 3 - Derryreag NIS.docx Page 4 of 54
o All shot-creting works shall be undertaken in accordance with "BS EN 14487 : sprayed concrete - execution";
o Nominal 200mm Thick C25/30 Shotcrete Lining with A393 Stainless Steel Mesh Reinforcement to 1/3 diameter height;
o The culvert lining works shall be executed during the low water flow in the months July to September inclusive;
o Set up pump on road within works area;
o Pump hoses will always be located within dry works area so there is no chance of concrete spillage entering the watercourse;
o Care to be taken when working beside live road;
o Direct concrete lorry to pump;
o One man to act as pump operative;
o 2 men required for nozzle and spraying;
o Spotter to stand at mouth of culvert and act as communicator between pump man and nozzle man;
o Googles or glasses to be worn at all times when shotcreting;
o Nominal 200mm to be sprayed on culvert face;
o Pump hoses etc. to be completely cleaned ready for next days pour.
• Works will take approximately 2 weeks;
• Excess concrete to be put in skip;
• Upon demobilisation all plant and materials to be taken away in Cumnor hiab truck with hiab crane. Terram to be disposed of in skip.
• Flume to be removed from river and Dam 1 & 2 dismantled;
• Silt fences and dam 3 to be left in place until the sediment upstream of same has dissipated;
• Small step in river bed outside culvert to be reinstated with washed gravel as required;
• All sandbags to be lifted from river and taken to Conhor Construction tip in Ballincollig;
• River bed outside culvert to be reinstated with clean gravels as required.
5162555DG0025 | 3 | 19/03/2021 Atkins | 5162555DG0025 rev 3 - Derryreag NIS.docx Page 5 of 54
1.2.2. Hydraulic Assessment
A hydraulic impact assessment was prepared for the proposed project. The hydraulic assessment report is included in Appendix C. The hydraulic assessment was conducted to analyse the impact of the proposed lining on the culvert’s flow capacity, change in predicted water levels upstream and downstream of the culvert, and changes in the velocities during low flow events. The hydraulic model shows that the proposed works to the existing culvert will not have a significant impact on the hydrological and hydraulic regime of the watercourse. The hydraulic impact assessment supported a Section 50 licence application to the Office of Public Works (OPW). Section 50 consent has been obtained for the proposed project at Derryreag Culvert (Appendix D), granted on 19th March 2021. A recommendation of the consent was that the proposed project should be designed to be resistant to scour and erosion, especially in a flood situation. The design of the proposed project incorporates this recommendation.
The following conclusions, based on the hydrology estimations and further hydraulic model assessment for the baseline and proposed scenarios, were made in the hydraulic assessment for Derryreag Culvert: -
• ‘This hydraulic capacity assessment has been prepared in consideration of the requirements under Section 50 of the Arterial Drainage Act 1945.
• FSR3 methodology has been used to derive flows for QMED, Q100 and Q100C1 and their magnitudes are 8.84m3/s, 18.53 m3/s and 22.24 m3/s respectively.
• The proposed works, due to the reduced flow area, results in increase in water levels at upstream of the Derryreag culvert. No changes in the maximum water levels are predicted at the downstream.
• For the three events analysed, the predicted increase in the maximum stage is in the range of 166 mm to 293 mm. The change due to the proposed works is within the OPW limit of 300 mm.
• A minimum freeboard of 2.523 m is available in the culvert under all conditions, and this meets the OPW minimum threshold criteria.
• During low flows, minimum depth in the culvert will increase from 1.513 m to 1.679 m and flow velocity reduce from 1.442 m/s to 1.271 m/s. The impact of these changes on fish passage and any necessary mitigation works will be discussed and agreed with Inland Fisheries Ireland before commencement of the works.
• The nearby properties and N22 road are not expected to be affected due to the proposed works’.
Atkins consulted with Inland Fisheries Ireland (IFI) in May 2020. IFI were of the opinion that Derryreag Culvert is impassable to the upward movement of fish due to a high perched outfall, which would need significant modification of the channel for an extended distance downstream to make the culvert passable. It was IFI’s view that due to the limited catchment upstream of the culvert, these extensive works may not be justified. Prevention of loss of sediment and cementitious material to the watercourse were raised as a concern during the proposed installation of the concrete invert. These concerns will be addressed through the implementation of measures detailed in the working methods, contractor’s method statement (Appendix B) and mitigation measures set out in Section 6.3 of this NIS.
5162555DG0025 | 3 | 19/03/2021 Atkins | 5162555DG0025 rev 3 - Derryreag NIS.docx Page 6 of 54
Legend Derryreag Bridge
River Network Derryreag Flesk
Client: Transport Infrastructure Ireland
Project: Munster Bridges Term Maintenance Title: Derryreag Bridge Site Location
Drawn: Checked: Authorised: EN NS PO'D Date: Date: 11/06/2020 Date: 11/06/2020 11/06/2020
Drawing No: 1.2 Rev: 1.0
Ordnance Survey Ireland Licence No. AR 0082517 © Ordnance Survey Ireland and Government of Ireland
2. Scope of Study
The proposed project was previously subject to Screening for AA, where TII determined that the proposed project required Appropriate Assessment.
Thus, the aim of this report is to provide supporting information to assist the competent authority to carry out an Appropriate Assessment with respect to the proposed project. 2.1. Legislative Context
Directive 92/43/EEC on the Conservation of Natural Habitats and Wild Fauna and Flora, known as the ‘Habitats Directive’ provides legal protection for habitats and species of European importance. Article 2 of the Directive requires the maintenance or restoration of habitats and species of European Community interest, at a favourable conservation status. Articles 3 – 9 provide the legislative means to protect habitats and species of Community interest through the establishment and conservations of an EU-wide network of sites known as European sites. European sites are Special Areas of Conservation (SACs) designated under the Habitats Directive and Special Protection Areas (SPAs) designated under the Conservation of Wild Birds Directive (79/409/EEC).
Articles 6(3) and 6(4) of the Habitats Directive set out the decision-making tests for plans or projects that could potentially affect European sites. Article 6(3) establishes the requirement for Appropriate Assessment: -
“Any plan or project not directly connected with or necessary to the management of the site but likely to have a significant effect thereon, either individually or in combination with other plans or projects, shall be subject to appropriate assessment of its implications for the site in view of the site's conservation objectives. In the light of the conclusions of the assessment of the implications for the site and subject to the provisions of paragraph 4, the competent national authorities shall agree to the plan or project only after having ascertained that it will not adversely affect the integrity of the site concerned and, if appropriate, after having obtained the opinion of the general public.”
Article 6 (4) deals with the steps that should be taken when it is determined, as a result of Appropriate Assessment, that a plan or project will adversely affect a European site. Alternative solutions, imperative reasons of overriding public interest (IROPI) and compensatory measures need to be addressed in this case. Article 6(4) states: -
“If, in spite of a negative assessment of the implications for the site and in the absence of alternative solutions, a plan or project must nevertheless be carried out for imperative reasons of overriding public interest, including those of a social or economic nature, the Member State shall take all compensatory measures necessary to ensure that the overall coherence of Natura 2000 is protected. It shall inform the Commission of the compensatory measures adopted.
Where the site concerned hosts a priority natural habitat type and/or a priority species, the only considerations which may be raised are those relating to human health or public safety, to beneficial consequences of primary importance for the environment or, further to an opinion from the Commission, to other imperative reasons of overriding public interest.” 2.2. Appropriate Assessment Process
Guidance on the AA process was produced by the European Commission (EC, 2001; 2018), which was subsequently used to develop guidance for Ireland by the Department of Environment, Heritage and Local Government in 2009 (DEHLG, 2009) and also by the National Parks and Wildlife Service in 20181 (NPWS 2018). These guidance documents set out a staged approach to complete the AA process and outlines the issues and tests at each stage. The stages outlined below are taken from the guidance document Appropriate Assessment of Plans and Projects in Ireland – Guidance for Planning Authorities (DEHLG, 2009).
1 https://www.npws.ie/development-consultations
5162555DG0025 | 3 | 19/03/2021 Atkins | 5162555DG0025 rev 3 - Derryreag NIS.docx Page 8 of 54
Figure 2-1 - Appropriate Assessment Process (Source: DEHLG, 2009).
2.2.1. Screening for Appropriate Assessment
Screening is the process that addresses and records the reasoning and conclusions in relation to the first two tests of Article 6(3): -
i. Whether a plan or project is directly connected to or necessary for the management of the site, and ii. Whether a plan or project, alone or in combination with other plans and projects, is likely to have significant effects on a European site in view of its conservation objectives.
If the effects are deemed to be significant, potentially significant, or uncertain, then the process must proceed to Appropriate Assessment.
2.2.2. Appropriate Assessment
Appropriate Assessment considers whether the plan or project, alone or in combination with other projects or plans, will have adverse effects on the integrity of a European site, and includes any necessary mitigation measures.
The competent authority can only agree to the plan or project after having ascertained that it will not adversely affect the integrity of the site(s) concerned. If this cannot be determined, and where sufficient mitigation cannot be achieved, the alternative solutions need to be considered and the process proceeds to the consideration of alternative solutions.
2.2.3. Alternative Solutions
This examines any alternative solutions or options that could enable the plan or project to proceed without adverse effects on the integrity of a European site. The process must return to AA as alternatives will require assessment in order to proceed. Demonstrating that all reasonable alternatives have been considered and assessed, and that the least damaging option has been selected, it is necessary to examine whether there are imperative reasons of overriding interest (IROPI).
2.2.4. IROPI
This examines whether there are imperative reasons of overriding public interest for allowing a plan or project that will have adverse effects on the integrity of a European site to proceed in cases where it has been established that no less damaging alternative solution exists. Compensatory measures must be proposed and assessed, of which the Commission must be informed.
The AA process only progresses through each of the full process for certain plans and projects. For example, for a project not connected with the management of a European site and where no likely significant effects on a European site in view of its conservation objectives are identified, the process stops at Screening for AA. Throughout the process the precautionary principle must be applied, which requires that the conservation objectives of Natura 2000 should prevail where there is uncertainty (EC, 2001; 2018).
5162555DG0025 | 3 | 19/03/2021 Atkins | 5162555DG0025 rev 3 - Derryreag NIS.docx Page 9 of 54
3. Methods
3.1. Legislation & Guidance Documents
This report was prepared with reference and due consideration to the following documents and due regard for relevant case law, including but not limited to: -
• Council Directive 92/43/EEC of 21 May 1992 on the conservation of natural habitats and of wild flora and fauna (Habitats Directive);
• Statutory Instrument No. 477/2011 — European Communities (Birds and Natural Habitats) Regulations 2011;
• National Parks and Wildlife Service - Development Consultations2 (NPWS 2018)
• European Commission (2018). Managing Natura 2000 sites: the provisions of Article 6 of the ‘Habitats’ Directive 92/43/EEC;
• European Commission (2001). Assessment of plans and projects significantly affecting Natura 2000 sites: Methodological guidance on the provisions of Articles 6(3) and (4) of the Habitats Directive 92/43/EEC;
• Department of the Environment, Heritage and Local Government (2009). Appropriate Assessment of Plans and Projects in Ireland. Guidance for Planning Authorities; and,
• Case C-323/17 People Over Wind & anor. V. Coillte. 3.2. Desk Study
A desk study was carried out to collate information available on European sites in the vicinity of the proposed project. These areas were viewed using Google Earth, Google maps3 and Bing maps4 (last accessed on 09/06/2020).
The National Parks and Wildlife Service (NPWS) and National Biodiversity Data Centre (NBDC) online databases were reviewed concerning European sites and their features of interest in the vicinity of the proposed project. The Environmental Protection Agency (EPA) mapping5 system was used to identify any hydrological connection between the proposed project and European sites.
Locations and boundaries of all European sites within the potential zone of influence of the proposed project were identified and reviewed using the NPWS online map viewer. Boundary shapefiles were also downloaded from this site to facilitate the preparation of project graphics.
Desktop information on relevant European sites were reviewed on the NPWS website, including the site synopsis for each SAC/SPA, the conservation objectives, the site boundaries as shown on the NPWS online map viewer, the standard Natura 2000 Data Form for the SAC/SPA which details conditions and threats of the sites, and published information and unpublished reports on the relevant European sites.
Relevant planning information for the surrounding area was reviewed using the planning enquiry systems of Kerry County Council. Search criteria were implemented to determine whether such projects or plans that would not be relevant to this study. This information was used to determine potential cumulative impacts from other plans / projects with the proposed project.
2 https://www.npws.ie/development-consultations 3 https://www.google.ie/maps 4 http://www.bing.com/maps/ 5 https://gis.epa.ie/EPAMaps/
5162555DG0025 | 3 | 19/03/2021 Atkins | 5162555DG0025 rev 3 - Derryreag NIS.docx Page 10 of 54
3.2.1. Geographical Information System
Under the Munster Bridges Term Maintenance Contract No. 3, Atkins developed a Geographic Information System (GIS) to store all ecological data relating to the Munster bridges and to facilitate easy interrogation of data both within the dataset and spatially. The GIS was used during the assessment of the 16 structures proposed for the installation of concrete inverts for geospatial analysis of all data using MapInfo V. 16. This included the examination of the locations and boundaries of European sites within 15km of all structures and determination of surface water connectivity between structures and European sites, using the EPA’s river network data.
Under the Munster Bridges Term Maintenance Contract No. 3, Atkins submitted a data request to NPWS with regard to freshwater pearl mussel Margaritifera margaritifera. This dataset was also used in the GIS. 3.3. Site Visit
An ecological walkover survey of the site was conducted by an Atkins ecologist during September 2019. The purpose of the survey was to survey the site for invasive plant species and to record the habitats and flora in the vicinity of the proposed project. The survey was chiefly concerned with recording the presence or likely presence of protected species and recording protected habitats or those habitats suitable to support protected species, in particular qualifying interests of European sites. The survey had regard for guidance sources such as NRA (2009) and Smith et al. (2011).
Aerial photos and site maps assisted the ecological walkover survey. Mammals and birds were surveyed based on incidental sightings, signs of activity during the survey and the identification of possible suitable habitats to support these species. Habitats were classified and named according to Fossitt (2000).
During the ecological survey the presence of invasive plant species such as Japanese knotweed Fallopia japonica, Himalayan balsam Impatiens glandulifera and Giant Hogweed Heracleum mantegazzianum were recorded. 3.4. Consultation
Consultation took place with IFI and the OPW regarding the proposed installation of the concrete invert at Derryreag Culvert. Concerns raised by IFI were in relation to the loss of sediment and cementitious material to the watercourse during the installation of the proposed concrete invert, which are addressed in the working methods, contractor’s method statement (Appendix B) and mitigation measures set out in Section 6.3 of this report. Consultation with the OPW was with respect to the findings of the hydraulic assessment (Appendix C). Section 50 consent has been obtained for the proposed project at Derryreag Culvert (Appendix D). 3.5. Statement of Authority
This report was prepared by Niamh Sweeney under the direction of Paul O’Donoghue, who also provided peer review support.
Niamh Sweeney (BSc, MSc (Res)) is a freshwater ecologist with over 10 years’ experience in ecological consultancy, with specialisms in macroinvertebrate and diatom taxonomy. Niamh has worked on numerous Screenings for Appropriate Assessment, Natura Impact Statements and Ecological Impact Assessments for private architect firms, waste companies, numerous County Councils, the OPW and Inland Fisheries Ireland. Niamh carried out the site visit and preparation of this report.
Emma Nickelsen has a BSc (Hons) in Environmental Biology and an MSc in Marine Biology. Emma has worked in ecological and environmental consultancy since 2017, working on a wide range of projects including bridge works, road construction, local amenity development and renewable energy. A focus of Emma’s work to date has been on conducting Appropriate Assessment screenings, ecological appraisals and supporting the preparation of Natura Impact Statements and Ecological Impact Statements. Emma assisted in the preparation of this report.
5162555DG0025 | 3 | 19/03/2021 Atkins | 5162555DG0025 rev 3 - Derryreag NIS.docx Page 11 of 54
Paul O’Donoghue has a BSc (Zoology), MSc (Behavioural Ecology) and a PhD in avian ecology and genetics. Paul is a chartered member of the Society for the Environment (CEnv) and a full member of the Chartered Institute of Ecology and Environmental Management (MCIEEM). Paul has over 18 years’ experience in ecology; including extensive experience in the preparation of Habitat Directive Assessments / Natura Impact Statements (i.e. Appropriate Assessment under Article 6(3) of the EU Habitats Directive). Paul carried out the technical review of this report.
5162555DG0025 | 3 | 19/03/2021 Atkins | 5162555DG0025 rev 3 - Derryreag NIS.docx Page 12 of 54
4. Existing Environment
4.1. Desktop Review
Derryreag Culvert is situated on a tributary of the River Flesk. The River Flesk is ‘High’ status (as categorised under the WFD) in its upper reaches and ‘Good’ status along the reaches where the Derryreag stream joins the River Flesk.
Fish species recorded in the lower reaches of the River Flesk, upstream of Lough Leane, were salmon (Salmo salar), European eel (Anguilla anguilla) and brown trout (Salmo trutta) (CRFB, 2008).
The National Biodiversity Data Centre does not show any records for white-clawed crayfish (Austropotamobius pallipes) on the River Flesk and its tributaries. This is most likely due to the underlying sandstone bedrock, resulting in conditions that are sub-optimal for crayfish, which need sufficient calcium concentrations in the water column to grow and harden their exoskeleton.
The Flesk River catchment is situated within the Laune Margaritifera Sensitive Area. )
t d There are no pearl mussel records for the Derryreag stream, which the culvert spans.
Otter activity signs were recorded on the River Flesk approximately 2km upstream of the Derryreag-Flesk confluence during the National Otter Survey of Ireland 2010/2012 (Reid et al., 2013). Given the nature of the River Flesk and the fish community it supports, the Flesk would provide very good supporting habitat for otter. There are no road kill records for otter in the vicinity of the culvert on the Road Kill Survey 2020 database6. 4.2. Site Visit
Derryreag culvert carries the N22 over the Derryreag stream. The culvert is located in a rural setting, mainly surrounded by agricultural lands. Conifer plantations are also present in the general area.
The Derryreag stream is an upland stream with a medium to steep gradient. The channel is approximately 2m in width. The flow type consists of shallow runs, cascades and pools. Upstream of the culvert, bedrock is very prominent. A step and cascade is present approximately 20m upstream of the culvert. Downstream of the culvert bedrock is prominent again, with large rocks and boulders. A significant step and cascade is located approximately 10m downstream of the culvert.
The riverbanks both upstream and downstream of the culvert are high and steep. The lands upstream of the culvert are agricultural grassland fields containing rushes. These are bordered by conifer plantations. The vegetation of the upstream riverbanks consisted of willow (Salix spp.), bramble (Rubus fructicosus), ferns (Polypodiopsida), bracken (Pteridium aquilinum), herb-robert (Geranium robertianum), ragwort (Senecio jacobaea) and angelica (Angelica archangelica). Japanese knotweed (Reynoutria japonica) was extensive on both banks ca. 5m upstream of the culvert. The stands on the right bank (facing downstream) covered approximately 20m of the bank in length. Japanese knotweed stands on the left bank extended into the adjacent agricultural grassland field.
Downstream of the culvert, the right bank is planted with conifer trees. There is little to no understory vegetation on the right bank. An agricultural grassland field is adjacent to the right riverbank. The vegetation of the left downstream bank consisted of willow, beech (Fagus sylvatica), ferns, bramble, and Japanese knotweed. A stand of Japanese knotweed is located ca. 1m downstream of the culvert. The extent of this stand could not be determined due to its located adjacent to significant step in the riverbed and associated cascade.
6 2020 Road Kill Survey - http://www.biology.ie/mapv.php?m=npws
5162555DG0025 | 3 | 19/03/2021 Atkins | 5162555DG0025 rev 3 - Derryreag NIS.docx Page 13 of 54
Due to the nature of the channel, the downstream cascade acts as a natural barrier to fish passage. Thus, it is not anticipated that the upper reaches of the Derryreag stream support salmonids and lamprey species. However, as outlined in Section 4.1 above, the River Flesk support these species.
Floating river vegetation habitat (3260) was not recorded within the channel in the vicinity of the culvert that will be within the works area of the proposed project. The cascades located upstream and downstream of the culvert were not surveyed due to health and safety reasons. However, these cascades are outside the working area of the proposed project. It should also be noted that the proposed project is not located within a European site.
Otter activity was not recorded at the time of the site visit. Otter could commute upstream from the River Flesk along the riverbanks. No otter holts were recorded.
Plate 4-1 Channel upstream of Derryreag culvert.
Plate 4-2 Downstream side of Derryreag culvert (note Japanese knotweed stand in right photo).
5162555DG0025 | 3 | 19/03/2021 Atkins | 5162555DG0025 rev 3 - Derryreag NIS.docx Page 14 of 54
Plate 4-3 Japanese knotweed on upstream right and left banks respectively.
5162555DG0025 | 3 | 19/03/2021 Atkins | 5162555DG0025 rev 3 - Derryreag NIS.docx Page 15 of 54
5. Screening for Appropriate Assessment
5.1. Connectivity of Proposed Project to European Sites
The ‘zone of influence’ (ZoI) for a project is the area over which ecological features may be subject to significant effects as a result of the proposed project and associated activities. This is likely to extend beyond the project site, for example where there are ecological or hydrological links beyond the site boundaries. The zone of influence will vary for different ecological features depending on their sensitivity to an environmental change (CIEEM, 2019).
A distance of 15km is recommended in the case of plans, as a potential zone of influence and this distance is derived from UK guidance (Scott Wilson et al., 2006). However, for projects the distance could be much less, and in some cases less than 100m. National Parks and Wildlife Service guidance7 advises that this must be evaluated on a case-by-case basis with reference to the nature, size and location of the project, the sensitivities of the ecological receptors, and the potential for in-combination effects.
Thus, given the nature, scale and extent of the proposed project, the potential zone of influence will consider European sites with regard to the location of a European site, the QIs of the site and their potential mobility outside that European site, the Cause-Pathway-Effect model and potential environment effects of the proposed project.
5.1.1. Special Areas of Conservation
There is one SAC located within the potential zone of influence of the proposed project. This SAC is listed in Table 5-1 along with its features of interest.
Killarney National Park, Macgillycuddy's Reeks And Caragh River Catchment SAC (000365) is located approximately 100m downstream of Derryreag Culvert. Therefore, this SAC is within the zone of influence of the proposed project.
5.1.2. Special Protection Areas
There are two SPAs located within the potential zone of influence of the proposed project. These SPAs are listed in Table 5-2 along with their features of interest.
Mullaghanish to Musheramore SPA (004162) is located approximately 7.5km to the east of Derryreag Culvert. This SPA is designated for hen harrier (Cirus cyaneus). Hen harrier forage up to ca. 5km from the nest site (NPWS, 2012). The activities associated with the construction phase of the proposed project at Derryreag culvert will be temporary in nature and will not result in loss or disturbance of supporting habitat regarding nesting sites and hunting ground for Hen Harrier, which is typically open bog, moorland, young conifer plantation and hill farmland (NPWS, 2012). Thus, given the nature and extent of the proposed works at Derryreag culvert, likely significant effects to the SPA are not anticipated. Thus, likely significant effects are not anticipated as a result of the proposed project and thus, this SPA is not considered further in this assessment.
Killarney National Park SPA (004038) is located 14.5km to the west of Derryreag culvert. The SPA does have hydrologically connectivity to the SPA. The SPA is located ca. 28km downstream of the proposed project. This SPA is designated for merlin (Falco columbarius) and Greenland white-fronted goose (Anser albifrons flavirostris). Greenland white-fronted geese migrate to Ireland during the winter months. The proposed project must be carried out during the summer months due to the instream fishery working window and hence, the construction phase of the proposed project and the overwintering period of the geese in Ireland will not coincide. Killarney National Park is estimated to support 5 pairs of Merlin (NPWS, 2014). Merlin typically breed from approximately May onwards in upland areas, i.e. Killarney National Park and it is unlikely that Merlin will forage a distance of 14km during the breeding season. Given the nature and extent of the proposed works at Derryreag
7 DoEHLG (2009). Appropriate Assessment of Plans and Projects in Ireland. Guidance for Planning Authorities. Department of Environment, Heritage and Local Government, Dublin, Ireland.
5162555DG0025 | 3 | 19/03/2021 Atkins | 5162555DG0025 rev 3 - Derryreag NIS.docx Page 16 of 54
culvert, loss or disturbance of supporting habitat regarding nesting sites and hunting ground will not occur. Thus, likely significant effects are not anticipated as a result of the proposed project and thus, this SPA is not considered further in this assessment.
Table 5-1 - SACs within potential ZoI of the proposed project.
Site Name Approximate Features of Interest Within ZoI distance Killarney National 100m • Oligotrophic waters containing very few Yes minerals of sandy plains (Littorelletalia Park, Macgillycuddy's Hydrologically uniflorae) [3110] Reeks And Caragh connected to the River Catchment SAC SAC • Oligotrophic to mesotrophic standing waters with vegetation of the Littorelletea uniflorae and/or Isoeto-Nanojuncetea [3130] • Water courses of plain to montane levels with the Ranunculion fluitantis and Callitricho- Batrachion vegetation [3260] • Northern Atlantic wet heaths with Erica tetralix [4010] • European dry heaths [4030] • Alpine and Boreal heaths [4060] • Juniperus communis formations on heaths or calcareous grasslands [5130] • Calaminarian grasslands of the Violetalia calaminariae [6130] • Molinia meadows on calcareous, peaty or clayey-silt-laden soils (Molinion caeruleae) [6410] • Blanket bogs (* if active bog) [7130] • Depressions on peat substrates of the Rhynchosporion [7150] • Old sessile oak woods with Ilex and Blechnum in the British Isles [91A0] • Alluvial forests with Alnus glutinosa and Fraxinus excelsior (Alno-Padion, Alnion incanae, Salicion albae) [91E0] • Taxus baccata woods of the British Isles [91J0] • Geomalacus maculosus (Kerry Slug) [1024] •
• Euphydryas aurinia (Marsh Fritillary) [1065] • Petromyzon marinus (Sea Lamprey) [1095] • Lampetra planeri (Brook Lamprey) [1096] • Lampetra fluviatilis (River Lamprey) [1099] • Salmo salar (Salmon) [1106] • Rhinolophus hipposideros (Lesser Horseshoe Bat) [1303] • Lutra lutra (Otter) [1355] • Trichomanes speciosum (Killarney Fern) [1421] • Najas flexilis (Slender Naiad) [1833] • Alosa fallax killarnensis (Killarney Shad) [5046
5162555DG0025 | 3 | 19/03/2021 Atkins | 5162555DG0025 rev 3 - Derryreag NIS.docx Page 17 of 54
Table 5-2 - SPAs within potential ZoI of the proposed project. Site Name Approximate Features of Interest Within ZoI distance
Mullaghanish to 7.5km • Hen Harrier (Circus cyaneus) [A082] No Musheramore SPA No hydrological connectivity Killarney National Park 14.5km • Merlin (Falco columbarius) [A098] No SPA Instream distance • Greenland White-fronted Goose (Anser albifrons ca. 28km flavirostris) [A395]
5162555DG0025 | 3 | 19/03/2021 Atkins | 5162555DG0025 rev 3 - Derryreag NIS.docx Page 18 of 54
Legend Derryreag Bridge
Rivers
15km Buffer
Special Area of Conservation Blackwater River (Cork/ Waterford) SAC Killarney National Park, Macgillycuddy's Reeks And Caragh River Catchment SAC St. Gobnet's Wood SAC Old Domestic Building, Curraglass Wood SAC Kilgarvan Ice House SAC
Mullaghanish Bog SAC
Client: Transport Infrastructure Ireland
Project: Munster Bridges Term Maintenance
Title: SACs within ZOI of Derryreag Bridge
Drawn: Checked: Authorised: EN NS PO'D Date: Date: 11/06/2020 Date: 11/06/2020 11/06/2020
Drawing No: 5.1 Rev: 1.0
Ordnance Survey Ireland Licence No. AR 0082517 © Ordnance Survey Ireland and Government of Ireland Legend Derryreag Bridge
15km Buffer
Special Areas of Conservation Killarney National Park SPA Mullaghanish to Musheramore Mountains SPA
Client: Transport Infrastructure Ireland
Project: Munster Bridges Term Maintenance Title: SPAs within ZOI of Derryreag Bridge
Drawn: Checked: Authorised: EN NS PO'D Date: Date: 11/06/2020 Date: 11/06/2020 11/06/2020
Drawing No: 5.2 Rev: 1.0
Ordnance Survey Ireland Licence No. AR 0082517 © Ordnance Survey Ireland and Government of Ireland
5.2. Brief Description of European sites
5.2.1. Killarney National Park, Macgillycuddy's Reeks and Caragh River Catchment SAC (000365)
NPWS (2013) site synopsis describes the site and is summarised as follows:-
‘This very large site encompasses the mountains, rivers and lakes of the Iveragh Peninsula, and the Paps Mountains which stretch eastward from Killarney towards Millstreet. The majority of the site is in Co. Kerry, with a small portion in Co. Cork. This is the most mountainous region in Ireland and includes Carrauntoohil, the highest peak in the country at 1,039 m.
The Oak woodlands, occurring mostly around the Killarney lakes, are the habitat for which the area is perhaps best known. They form the most extensive area of native woodland remaining in Ireland and include Derrycunihy Wood, described as perhaps the most natural Sessile Oak (Quercus petraea) wood in the country. The woods are typically dominated by Sessile Oak, with an understorey of Holly (Ilex aquifolium). The Strawberry-tree (Arbutus unedo) is a notable component of the woods and there are scattered areas of Yew (Taxus baccata).
The only sizeable Yew woodland in Ireland is found on the limestone of the Muckross peninsula. Here, some of the trees are up to 200 years old. The dense shade beneath the tree results in few herbs in the ground flora, but the bryophyte layer is well-developed and almost continuous.
Wet woodland, or carr, occurring on the low-lying limestone areas within the floodplain of Lough Leane, forms one of the most extensive areas of this woodland type in Ireland. The dominant canopy species are Alder (Alnus glutinosa), willows (Salix spp.), Ash (Fraxinus excelsior) and Downy Birch (Betula pubescens), while the field layer is dominated by Remote Sedge (Carex remota) and Creeping Bent (Agrostis stolonifera).
The most common habitat types within the overall site are blanket bog, heath and upland grassland. The heath and grassland generally occur on areas with shallow peat and on the mineral soils of the steep mountain sides, while the blanket bog occurs on the more gentle slopes, plateaux and other level ground. Often the habitats occur in a mosaic, with exposed rock frequently occurring.
A variety of blanket bog types are represented from lowland valley to mountain blanket bog. Some of the best include: Cummeragh River Bog Nature Reserve, a domed bog which is perhaps the most southern intact blanket bog in the country; Ballygisheen, which contains one of the most extensive areas of intact lowland blanket bog in Co. Kerry; Coomacheo/Caherbarnagh, which combine to form the largest mountain blanket bog in the south-west; Eirk Bog Nature Reserve, a classic example of a bog intermediate between a raised and blanket bog; Mangerton Bog, an upland bog which grades into an unusual lichen heath seen at no other site; and Oolagh East, a quaking basin mire.
The site contains many lakes, but these can be broadly divided into two types: small upland corrie lakes and larger lowland lakes. Examples of the first type are Lough Murtagh and Lough Gortavehy in the Paps Mountains. The lowland lakes are mostly oligotrophic, although Lough Leane, the largest freshwater body in the region, has become somewhat mesotrophic as a result of pollution from Killarney town.
The rivers associated with these lakes are also of importance. The Caragh is relatively unpolluted from headwater to estuary, a rare phenomenon in Europe. The Flesk runs over Old Red Sandstone in its upper reaches and limestone as it nears Lough Leane. Both rivers support floating and submerged vegetation and rare invertebrates. Rocks around the smaller mountain streams often support a lush vegetation of ferns and bryophytes, most notably at Torc Waterfall.
The site is valuable for its rare fish species, five of which are listed on Annex II of the E.U. Habitats Directive: Brook Lamprey (Lampetra planeri), River Lamprey (Lampetra fluviatilis), Sea Lamprey (Petromyzon marinus), Atlantic Salmon (Salmo salar) and Killarney Shad (Alosa fallax killarnensis). The Killarney Shad is a unique land-locked subspecies confined to the Killarney lakes. Also of note is the
5162555DG0025 | 3 | 19/03/2021 Atkins | 5162555DG0025 rev 3 - Derryreag NIS.docx Page 21 of 54
glacial relict, Arctic Char (Salvelinus alpinus), a Red Data Book species, a unique form of which is found in Lough Coomasaharn.
There are numerous rare invertebrates within the site. These include three E.U. Habitats Directive Annex II species: Kerry Slug (Geomalacus maculosus), and the Marsh Fritillary (Euphydryas aurinia). The Kerry Slug populations are of particular importance in a national context. Other species of note include: three chironomids of international importance found in the River Flesk; a wood ant (Formica lugubris) at one of only four Irish sites; a snail (Limnaea involuta), in Lough Crincaum, at its only known location; two dragonflies (Cordulea aenea and Somatochlora arctica), the former at one of only two known sites in Ireland and the latter at its only known Irish location; and several other aquatic and woodland species at their only known Irish locations.’
5.2.1.1. Features of Interest
Killarney National Park, Macgillycuddy's Reeks and Caragh River Catchment SAC is designated for the habitats and species listed in Table 5-3. Due to the size and geographic range of the SAC, not all qualifying interests of the SAC are within the ZoI of the proposed project. It is important to note that the proposed project is hydrologically connected to the SAC and therefore, potential impacts will be indirect in nature to habitats and species in the vicinity of the bridge and indirect in nature via surface water pathways.
Given the location of the proposed project and the nature and scale of the proposed works, the qualifying interests of the SAC that are within the ZoI are habitats and species that are present in the vicinity of the bridge and surface water dependent habitats and species. These are summarised in Table 5-3 and are listed below:-
• Oligotrophic waters containing very few minerals of sandy plains (Littorelletalia uniflorae)
• Oligotrophic to mesotrophic standing waters with vegetation of the Littorelletea uniflorae and/or Isoeto- Nanojuncetea
• Water courses of plain to montane levels with the Ranunculion fluitantis and Callitricho-Batrachion vegetation
•
• Sea Lamprey Petromyzon marinus
• Brook Lamprey Lampetra planeri
• River Lamprey Lampetra fluviatilis
• Salmon Salmo salar
• Otter Lutra lutra
• Slender Naiad Najas flexilis
• Killarney Shad Alosa fallax killarnensis
5.2.1.2. Conservation Objectives
The conservation objectives of the qualifying interests within the ZoI of the proposed works are broadly summarised below for Killarney National Park, Macgillycuddy’s Reeks and Caragh River Catchment SAC:-
• To restore the favourable conservation condition of Oligotrophic waters containing very few minerals of sandy plains (Littorelletalia uniflorae);
5162555DG0025 | 3 | 19/03/2021 Atkins | 5162555DG0025 rev 3 - Derryreag NIS.docx Page 22 of 54
• To restore the favourable conservation condition of Oligotrophic to mesotrophic standing waters with vegetation of the Littorelletea uniflorae and/or Isoeto-Nanojuncetea;
• To maintain the favourable conservation condition of Water courses of plain to montane levels with the Ranunculion fluitantis and Callitricho-Batrachion vegetation;
• To restore the favourable conservation condition of Freshwater Pearl Mussel Margaritifera margaritifera
• To maintain the favourable conservation condition of Sea Lamprey Petromyzon marinus;
• To maintain the favourable conservation condition of Brook Lamprey Lampetra planeri;
• To maintain the favourable conservation condition of River Lamprey Lampetra fluviatilis;
• To maintain the favourable conservation condition of Atlantic Salmon Salmo salar;
• To maintain the favourable conservation condition of Otter Lutra lutra;
• To maintain the favourable conservation condition of Slender Naiad Najas flexilis;
• To restore the favourable conservation condition of Killarney Shad Alosa fallax killarnensis.
5.2.1.3. Potential Threats
‘The main land use within the site is grazing by sheep. In and around the National Park deer grazing is also common. The extensive grazing has caused damage to many of the terrestrial habitats, resulting in degradation of heath and blanket bogs and prevention of woodland regeneration. In the upland habitats the erosion caused by grazing is exacerbated by the exposed nature of the terrain. Apart from grazing, the woodlands are particularly threatened by Rhododendron (Rhododendron ponticum) invasion: approximately two thirds of the Oak woodlands are affected, although a Rhododendron removal programme is underway in the National Park. The Yew wood has been adversely affected by heavy grazing for many years, but it is intended to control this in the near future by erection of a deer fence. The bogs are sensitive to grazing and are also threatened by turbary, burning and afforestation. Most of the lakes are very acid-sensitive and therefore vulnerable to afforestation within the catchment areas. Lough Leane has been subject to some eutrophication, although water quality appears to have improved since phosphates were removed from the sewage in 1985’ (NPWS, 2013).
5162555DG0025 | 3 | 19/03/2021 Atkins | 5162555DG0025 rev 3 - Derryreag NIS.docx Page 23 of 54
Table 5-3 - Qualifying interests of the SAC within the ZoI of the proposed project. Qualifying Interest Location Within Zone of Influence Oligotrophic waters containing very few minerals of Lake habitat 3110 is likely to cooccur with lake habitat 3130 in Leane, Caragh, Muckross, the Yes sandy plains (Littorelletalia uniflorae) [3110] Upper Lake and Acoose (NPWS, 2017). The River Flesk flows into Lough Leane. Although the proposed culvert is located ca. 28km upstream of Lough Leane, the precautionary principle is being applied and this lake habitat is considered to be within the potential ZoI of the proposed project. Oligotrophic to mesotrophic standing waters with Lake habitat 3130 is considered likely to occur in Loughs Acoose, Caragh, Leane, The Long Yes vegetation of the Littorelletea uniflorae and/or Isoeto- Range and the Upper Lake in Killarney National Park (NPWS, 2017). Nanojuncetea [3130] The River Flesk flows into Lough Leane. Although the proposed culvert is located ca. 28km upstream of Lough Leane, the precautionary principle is being applied and this lake habitat is considered to be within the potential ZoI of the proposed project. Water courses of plain to montane levels with the The River Flesk is likely to support this habitat type associated with flowing waters. Thus, this Yes Ranunculion fluitantis and Callitricho-Batrachion habitat is considered to be within the potential ZoI of the proposed project. vegetation [3260] Northern Atlantic wet heaths with Erica tetralix [4010] This habitat is not in the vicinity of the proposed project (NPWS, 2017) and as determined by the No site visit. Thus, this habitat is not considered to be within the potential ZoI of the proposed project. European dry heaths [4030] This habitat is not in the vicinity of the proposed project (NPWS, 2017) and as determined by the No site visit. Thus, this habitat is not considered to be within the potential ZoI of the proposed project. Alpine and Boreal heaths [4060] This habitat is not in the vicinity of the proposed project (NPWS, 2017) and as determined by the No site visit. Thus, this habitat is not considered to be within the potential ZoI of the proposed project. Juniperus communis formations on heaths or This habitat is not in the vicinity of the proposed project (NPWS, 2017) and as determined by the No calcareous grasslands [5130] site visit. Thus, this habitat is not considered to be within the potential ZoI of the proposed project. Calaminarian grasslands of the Violetalia This habitat is not in the vicinity of the proposed project (NPWS, 2017) and as determined by the No calaminariae [6130] site visit. Thus, this habitat is not considered to be within the potential ZoI of the proposed project. Molinia meadows on calcareous, peaty or clayey-silt- This habitat is not in the vicinity of the proposed project (NPWS, 2017) and as determined by the No laden soils (Molinion caeruleae) [6410] site visit.
5162555DG0025 | 3 | 19/03/2021 Atkins | 5162555DG0025 rev 3 - Derryreag NIS.docx Page 24 of 54
Qualifying Interest Location Within Zone of Influence Thus, this habitat is not considered to be within the potential ZoI of the proposed project. Blanket bogs (* if active bog) [7130] This habitat is not in the vicinity of the proposed project (NPWS, 2017) and as determined by the No site visit. Thus, this habitat is not considered to be within the potential ZoI of the proposed project. Depressions on peat substrates of the This habitat is not in the vicinity of the proposed project (NPWS, 2017) and as determined by the No Rhynchosporion [7150] site visit. Thus, this habitat is not considered to be within the potential ZoI of the proposed project. Old sessile oak woods with Ilex and Blechnum in the This habitat is not in the vicinity of the proposed project (NPWS, 2017) and as determined by the No British Isles [91A0] site visit. Thus, this habitat is not considered to be within the potential ZoI of the proposed project. Alluvial forests with Alnus glutinosa and Fraxinus This habitat is not in the vicinity of the proposed project (NPWS, 2017) and as determined by the No excelsior (Alno-Padion, Alnion incanae, Salicion site visit. albae) [91E0] Thus, this habitat is not considered to be within the potential ZoI of the proposed project. Taxus baccata woods of the British Isles [91J0] This habitat is not in the vicinity of the proposed project (NPWS, 2017) and as determined by the No site visit. Thus, this habitat is not considered to be within the potential ZoI of the proposed project. Geomalacus maculosus (Kerry Slug) [1024] The distribution of Kerry slug is to the west of Lough Leane (NPWS, 2017). The habitats in the No vicinity of Derryreag culvert are not suitable to support Kerry slug. Thus, this species is not considered to be within the potential ZoI of the proposed project.
Euphydryas aurinia (Marsh Fritillary) [1065] The lands in the vicinity of Derryreag culvert do not have potential suitable habitat for marsh No fritillary (i.e. devil’s bit scabious present with mean height less than 50cm and with less than 10% cover of scrub more than 1m tall). Thus, this species is not considered to be within the potential ZoI of the proposed project. Petromyzon marinus (Sea Lamprey) [1095] Adult sea lamprey spawning has been recorded in at the upper reaches of the Laune catchment Yes and no barriers to passage have been found in the River Flesk (NPWS, 2017). Thus, this species is considered to be within the potential ZoI of the proposed project. Lampetra planeri (Brook Lamprey) [1096] The River Flesk has the potential to support river and brook lamprey. Yes Lampetra fluviatilis (River Lamprey) [1099] Thus, this species is considered to be within the potential ZoI of the proposed project.
5162555DG0025 | 3 | 19/03/2021 Atkins | 5162555DG0025 rev 3 - Derryreag NIS.docx Page 25 of 54
Qualifying Interest Location Within Zone of Influence Salmo salar (Salmon) [1106] The River Flesk has the potential to support salmon and salmon have been recorded in the Yes River Flesk (CFB, 2008). Thus, this species is considered to be within the potential ZoI of the proposed project. Rhinolophus hipposideros (Lesser Horseshoe Bat) Lesser horseshoe bat summer and winter roosts and the associated 2.5km foraging buffers are No [1303] not in the vicinity of Derryreag culvert. Thus, this species is not considered to be within the potential ZoI of the proposed project. Lutra lutra (Otter) [1355] The River Flesk and its tributaries have the potential to support otter. Yes Thus, this species is considered to be within the potential ZoI of the proposed project. Trichomanes speciosum (Killarney Fern) [1421] Hectads in which Killarney fern has previously been recorded are all located west or south west No of Killarney town and thus are not in the vicinity of the proposed project. Thus, this species is not considered to be within the potential ZoI of the proposed project. Najas flexilis (Slender Naiad) [1833] Slender Naiad is present in Lough Leane. Applying the precautionary principle, the lake habitats Yes that Lough Leane supports are within the ZoI of the proposed project. Therefore, the same approach is being applied to this species as it is dependent on water quality and water colour. Thus, this habitat is considered to be within the potential ZoI of the proposed project. Alosa fallax killarnensis (Killarney Shad) [5046] Killarney shad is unique to Lough Leane. The proposed project is hydrologically linked to Lough Yes Leane. Although the proposed culvert is located ca. 28km upstream of Lough Leane, the precautionary principle is being applied and this species is considered to be within the potential ZoI of the proposed project.
5162555DG0025 | 3 | 19/03/2021 Atkins | 5162555DG0025 rev 3 - Derryreag NIS.docx Page 26 of 54
6. Appropriate Assessment
6.1. Introduction
This section of the report assesses the European site in more detail and examines where likely significant effects may arise. Where these effects are identified, avoidance and mitigation measures are proposed to offset these effects. These are discussed below in the following sections. 6.2. Impact Evaluation
6.2.1. ‘Do Nothing’ Impact
In the case of the proposed project the ‘do nothing’ approach would be not to repair the existing culvert and not to install the concrete invert to its base. In the absence of the proposed project, Derryreag culvert will continue to convey flows under the N22. As the existing culvert is experiencing corrosion, in the absence of repair works, this corrosion will continue and may ultimately result in structural failure of the culvert.
The significant step in the riverbed and cascade downstream of the culvert is a natural barrier to fish passage. Therefore, the ‘do nothing’ approach would not affect the status of the culvert regarding fish passage.
Derryreag Culvert is located ca. 100m upstream of the SAC. Otter from the SAC could travel upstream and travel through the culvert. Given the nature of Derryreag Culvert, the sides of the culvert are dry at normal flows. Therefore, otter can freely pass through the culvert during normal flows. It is possible that during high flows, where the sides of the culvert are no longer dry, otter may not be able to travel through the culvert and may access the N22 road as a result. The proposed project is for the installation of a concrete invert at Derryreag Culvert. The hydraulic assessment demonstrates that the proposed project will not significantly affect the hydrological regime of the watercourse, nor the capacity of the culvert. Therefore, the installation of the concrete invert will not change the conditions under which Derryreag Culvert is passable to otter.
6.2.2. Potential impacts during the works
In summary and as outlined in Section 5 above, the features of interest that are within the zone of influence of the proposed works are: - • Oligotrophic waters containing very few minerals of sandy plains (Littorelletalia uniflorae) • Oligotrophic to mesotrophic standing waters with vegetation of the Littorelletea uniflorae and/or Isoeto- Nanojuncetea • Water courses of plain to montane levels with the Ranunculion fluitantis and Callitricho-Batrachion vegetation • • Sea Lamprey Petromyzon marinus • Brook Lamprey Lampetra planeri • River Lamprey Lampetra fluviatilis • Salmon Salmo salar • Otter Lutra lutra • Slender Naiad Najas flexilis • Killarney Shad Alosa fallax killarnensis
The attributes and targets for the conservation objectives of the qualifying interests within the zone of influence of the proposed project listed above are set out in Table 6-1.
5162555DG0025 | 3 | 19/03/2021 Atkins | 5162555DG0025 rev 3 - Derryreag NIS.docx Page 27 of 54
. The proposed project is not located within these catchments.
6.2.2.1. Direct impacts
The proposed project is located approximately 100m upstream of the SAC boundary. Given the nature and extent of the proposed project, direct impacts to the qualifying interests of the SAC will not occur during the construction phase of the proposed project.
6.2.2.2. Indirect impacts
The site of the proposed project is hydrologically linked to the SAC via surface water pathways. The mobilisation of silts, nutrients, hydrocarbons and concrete materials, could potentially occur during the works. Spillages of products in their liquid state, e.g. primer products, could also potentially occur during the works.
The release and entry of these materials to the Derryreag stream, and in turn the River Flesk, has the potential to result in localised impacts of sedimentation and increased algal and macrophyte growth in the watercourses downstream, which in turn could impact on the aquatic biota that the watercourses support and hence, their ecological status.
Qualifying interests such as salmon, lamprey and freshwater pearl mussel may be impacted by the release of sediments as they are sensitive to changes in water quality. Mobilisation of sediments may affect lamprey and salmon spawning beds due to sedimentation of river substrates and the increase of fine sediments to spawning habitats. Freshwater pearl mussel requires very good water quality with cobble and gravel substrate containing very little fine sediment, and algal and plant growth. Increases in turbidity of the water column would affect the filter-feeding of pearl mussel and may cause stress to adult mussels, which could result in the mussels clamming up. Floating river vegetation is also sensitive to siltation and changes in substrate composition as this affects the rooted structure of the plants and their ability to photosynthesise.
The potential impacts to species such as salmon and lamprey may also indirectly affect otter and the availability of a food source (fish biomass). Salmon and lamprey are important food sources for otter and a decline in these would have an indirect negative impact on otter.
The lake habitats, slender naiad and Killarney shad, are also surface water dependent habitats and species. The water quality of the Lough Leane is important to maintain the habitats and species that it supports. This lake habitat is mainly impacted by decreased water clarity, eutrophication and changes to hydrological regime and morphology. The proposed project has the potential to impact of the water quality of the River Flesk, and hence potentially the water quality of Lough Leane.
The potential entry of polluting materials such as hydrocarbons and concrete material into the Derryreag stream would have a negative impact on all aquatic qualifying interests of the SAC that are within the zone of influence of the proposed project.
Due to the presence of site staff at the culvert for 2 weeks, i.e. the duration of the works, there is potential for temporary disturbance of otter that may travel upstream from the SAC. However, given the scale, extent and duration of the works, this impact is not anticipated to be significant. The dam setup will not cause fragmentation of the riparian corridor and thus, otter will be free to travel through the culvert. However, it is acknowledged that this will most likely be when the work crew is not present at the site, i.e. at the end of each working day until the following morning when works re-commence and at weekends.
Japanese knotweed is present on the top of the riverbanks ca. 5m upstream of Derryreag Culvert and a stand of Japanese knotweed is also present on the downstream left bank. It is important that avoidance measures and biosecurity protocols are implemented during the works to ensure that the stands of Japanese knotweed are not disturbed. It is important to note that due to the nature of the watercourse channel with exposed bedrock and the culvert structure, the rhizomes of the Japanese knotweed stands are contained within the soils of the riverbank and not within the instream working area.
5162555DG0025 | 3 | 19/03/2021 Atkins | 5162555DG0025 rev 3 - Derryreag NIS.docx Page 28 of 54
6.2.3. Potential impacts post completion of the works
As shown by the hydraulic impact assessment, the proposed repair works to the existing culvert will not impact on the hydrological and hydraulic regime of the watercourse. The installation of the concrete invert at Derryreag Culvert will not alter the conditions under which the culvert is passable to otter, nor will it alter the status of the culvert regarding fish passage. The operation of the proposed project will not generate further emissions to the watercourse.
5162555DG0025 | 3 | 19/03/2021 Atkins | 5162555DG0025 rev 3 - Derryreag NIS.docx Page 29 of 54
Table 6-1 - Site-specific conservation objectives for QIs within ZoI of the proposed project. Qualifying Interest Attribute Measure Target Oligotrophic waters containing very Habitat area Hectares Area stable or increasing, subject to natural processes. few minerals of sandy plains (Littorelletalia uniflorae) Habitat distribution Occurrence No decline, subject to natural processes. Typical species Occurrence Typical species present, in good condition, and demonstrating typical abundances and distribution. Vegetation composition: Occurrence All characteristic zones should be present, correctly distributed and in characteristic zonation good condition. Vegetation distribution: Metres Maintain maximum depth of vegetation, subject to natural processes. maximum depth Hydrological regime: water Metres Maintain appropriate natural hydrological regime necessary to level fluctuations support the habitat. Lake substratum quality Various Maintain appropriate substratum type, extent and chemistry to support the vegetation. Water quality: transparency Metres Maintain/restore appropriate Secchi transparency. There should be no decline in Secchi depth/transparency. Water quality: nutrients μg/l P; mg/l N Maintain/restore the concentration of nutrients in the water column to sufficiently low levels to support the habitat and its typical species. Water quality: phytoplankton μg/l Chlorophyll a Maintain/restore appropriate water quality to support the habitat, biomass including high chlorophyll a status. Water quality: phytoplankton EPA phytoplankton Maintain/restore appropriate water quality to support the habitat, composition composition metric including high phytoplankton composition status. Water quality: attached algal Algal cover and EPA Maintain/restore trace/absent attached algal biomass (<5% cover) biomass phytobenthos metric and high phytobenthos status. Water quality: macrophyte EPA macrophyte metric (The Maintain/restore high macrophyte status status Free Index) Acidification status pH units; mg/l Maintain appropriate water and sediment pH, alkalinity and cation concentrations to support the habitat, subject to natural processes. Water colour mg/l PtCo Maintain appropriate water colour to support the habitat. Dissolved organic carbon mg/l Maintain appropriate organic carbon levels to support the habitat. (DOC)
5162555DG0025 | 3 | 19/03/2021 Atkins | 5162555DG0025 rev 3 - Derryreag NIS.docx Page 30 of 54
Qualifying Interest Attribute Measure Target Turbidity Nephelometric turbidity units/ Maintain appropriate turbidity to support the habitat. mg/l SS/ other appropriate units Fringing habitat: area and Hectares Maintain the area and condition of fringing habitats necessary to condition support the natural structure and functioning of habitat 3110. Oligotrophic to mesotrophic Habitat area Hectares Area stable or increasing, subject to natural processes. standing waters with vegetation of the Littorelletea uniflorae and/or Habitat distribution Occurrence No decline, subject to natural processes. Isoeto-Nanojuncetea Typical species Occurrence Typical species present, in good condition, and demonstrating typical abundances and distribution. Vegetation composition: Occurrence All characteristic zones should be present, correctly distributed and in characteristic zonation good condition. Vegetation distribution: Metres Maintain maximum depth of vegetation, subject to natural processes. maximum depth Hydrological regime: water Metres Maintain appropriate natural hydrological regime necessary to level fluctuations support the habitat. Lake substratum quality Various Maintain appropriate substratum type, extent and chemistry to support the vegetation. Water quality: transparency Metres Maintain/restore appropriate Secchi transparency. There should be no decline in Secchi depth/transparency. Water quality: nutrients μg/l P; mg/l N Maintain/restore the concentration of nutrients in the water column to sufficiently low levels to support the habitat and its typical species. Water quality: phytoplankton μg/l Chlorophyll a Maintain/restore appropriate water quality to support the habitat, biomass including high chlorophyll a status. Water quality: phytoplankton EPA phytoplankton Maintain/restore appropriate water quality to support the habitat, composition composition metric including high phytoplankton composition status. Water quality: attached algal Algal cover and EPA Maintain/restore trace/absent attached algal biomass (<5% cover) biomass phytobenthos metric and high phytobenthos status. Water quality: macrophyte EPA macrophyte metric (The Maintain/restore high macrophyte status. status Free Index) Acidification status pH units; mg/l Maintain appropriate water and sediment pH, alkalinity and cation concentrations to support the habitat, subject to natural processes.
5162555DG0025 | 3 | 19/03/2021 Atkins | 5162555DG0025 rev 3 - Derryreag NIS.docx Page 31 of 54
Qualifying Interest Attribute Measure Target Water colour mg/l PtCo Maintain appropriate water colour to support the habitat. Dissolved organic carbon mg/l Maintain appropriate organic carbon levels to support the habitat. (DOC) Turbidity Nephelometric turbidity units/ Maintain appropriate turbidity to support the habitat. mg/l SS/ other appropriate units Fringing habitat: area and Hectares Maintain the area and condition of fringing habitats necessary to condition support the natural structure and functioning of habitat 3130. Water courses of plain to montane Habitat area Kilometres Area stable or increasing, subject to natural processes. levels with the Ranunculion fluitantis and Callitricho-Batrachion Habitat distribution Occurrence No decline, subject to natural processes. vegetation Hydrological regime: river flow Metres per second Maintain appropriate hydrological regime. Substratum composition: Millimetres Maintain/restore appropriate substratum particle size range, quantity particle size range. and quality, subject to natural process. Water quality Various Maintain/restore appropriate water quality to support the natural structure and functioning of the habitat. Typical species Occurrence Typical species of the relevant habitat sub-type should be present and in good condition. Floodplain connectivity: area Hectares The area of active floodplain at and upstream of the habitat should be maintained. Riparian habitat: area and Hectares Maintain the area and condition of fringing habitats necessary to condition support the habitat and its sub-types. s
e
5162555DG0025 | 3 | 19/03/2021 Atkins | 5162555DG0025 rev 3 - Derryreag NIS.docx Page 32 of 54
Qualifying Interest Attribute Measure Target Population structure: Percentage per size class Restore to at least 20% of each population no more than 65mm in recruitment length; and at least 5% of each population no more than 30mm in length. Population structure: adult Percentage No more than 5% decline from previous number of live adults mortality counted; dead shells less than 1% of the adult population and scattered in distribution. Suitable habitat: extent Kilometres See targets below and map 8. Note that the suitable habitat target lengths include the perimeters of lakes in each catchment. Suitable habitat: extent - Kilometres Restore suitable habitat in more than 33.18km in the Caragh and any Caragh additional stretches necessary for salmonid spawning. Suitable habitat: extent - Kilometres Restore suitable habitat in more than 6.86km in the Currane and any Currane additional stretches necessary for salmonid spawning. Suitable habitat: extent - Kilometres Restore suitable habitat in more than 4.45km in the Gearhameen and Gearhameen any additional stretches necessary for salmonid spawning. Water quality: Ecological quality ratio (EQR) Restore water quality - macroinvertebrates: EQR greater than 0.90 macroinvertebrate and (Q4-5 or Q5); phytobenthos: EQR greater than 0.93. phytobenthos (diatoms) Substratum quality: Percentage Restore substratum quality - filamentous algae: absent or trace (less filamentous algae than 5%); macrophytes: absent or trace (less than 5%). (macroalgae); macrophytes (rooted higher plants) Substratum quality: sediment Occurrence Restore substratum quality - stable cobble and gravel substrate with very little fine material; no artificially elevated levels of fine sediment. Substratum quality: oxygen Redox potential Restore to no more than 20% decline from water column to 5cm availability depth in substrate. Hydrological regime: flow Metres per second Restore appropriate hydrological regime. variability Host fish Number Maintain sufficient juvenile salmonids to host glochidial larvae. Fringing habitat: area and Hectares Maintain the area and condition of fringing habitats necessary to condition support the population. Sea lamprey Distribution: extent of Percentage of river accessible Greater than 75% of main stem length of rivers accessible from anadromy estuary.
5162555DG0025 | 3 | 19/03/2021 Atkins | 5162555DG0025 rev 3 - Derryreag NIS.docx Page 33 of 54
Qualifying Interest Attribute Measure Target Population structure of Number of age/size groups At least three age/size groups present. juveniles Juvenile density in fine Juveniles/m² Juvenile density at least 1/m². sediment Extent and distribution of m² and occurrence No decline in extent and distribution of spawning beds. spawning habitat Availability of juvenile habitat Number of positive sites in 3rd More than 10% of sample sites positive. order channels (and greater), downstream of spawning areas Brook and River lamprey Distribution Percentage of river accessible Access to all water courses down to first order streams. Population structure of Number of age/size groups At least three age/size groups of brook/river lamprey present. juveniles Juvenile density in fine Juveniles/m² Mean catchment juvenile density of brook/river lamprey at least 5/m². sediment Extent and distribution of m² and occurrence No decline in extent and distribution of spawning beds. spawning habitat Availability of juvenile habitat Number of positive sites in 2nd More than 50% of sample sites positive. order channels (and greater), downstream of spawning areas Salmon Distribution: extent of Percentage of river accessible 100% of river channels down to second order accessible from anadromy estuary. Adult spawning fish Number Conservation limit (CL) for each system consistently exceeded. Salmon fry abundance Number of fry/5 minutes Maintain or exceed 0+ fry mean catchment-wide abundance electrofishing threshold value. Currently set at 17 salmon fry/5 minutes sampling. Out-migrating smolt Number No significant decline abundance Number and distribution of Number and occurrence No decline in number and distribution of spawning redds due to redds anthropogenic causes.
5162555DG0025 | 3 | 19/03/2021 Atkins | 5162555DG0025 rev 3 - Derryreag NIS.docx Page 34 of 54
Qualifying Interest Attribute Measure Target Water quality EPA Q value At least Q4 at all sites sampled by EPA Otter Distribution Percentage positive survey No significant decline sites Extent of terrestrial habitat Hectares No significant decline. Area mapped and calculated as 1,936.8ha along river banks/lake shoreline/ around ponds. Extent of freshwater (river) Kilometres No significant decline. Length mapped and calculated as 1,246.2km. habitat Extent of freshwater (lake) Hectares No significant decline. Area mapped and calculated as 2,710.3ha. habitat Couching sites and holts Number No significant decline. Fish biomass available Kilograms No significant decline. Barriers to connectivity Number No significant increase. Slender Naiad Population extent Hectares; distribution No change to the spatial extent of Najas flexilis within the lakes, subject to natural processes. Population depth Metres No change to the depth range of Najas flexilis within the lakes, subject to natural processes. Population viability Plant traits No decline in plant fitness, subject to natural processes. Population abundance Square metres No change to the cover abundance of Najas flexilis, subject to natural processes. Species distribution Occurrence No decline, subject to natural processes. Habitat extent Hectares No decline, subject to natural processes. Hydrological regime: water Metres Maintain appropriate natural hydrological regime necessary to level fluctuations support the habitat for the species. Lake substratum quality Various Maintain appropriate substratum type, extent and chemistry to support the populations of the species. Water quality Various Maintain/restore appropriate water quality to support the populations of the species. Acidification status pH units; mg/l Maintain appropriate water and sediment pH, alkalinity and cation concentrations to support the populations of Najas flexilis, subject to natural processes.
5162555DG0025 | 3 | 19/03/2021 Atkins | 5162555DG0025 rev 3 - Derryreag NIS.docx Page 35 of 54
Qualifying Interest Attribute Measure Target Water colour mg/l PtCo Maintain appropriate water colour to support the populations of Najas flexilis. Associated species Species composition and Maintain appropriate associated species and vegetation communities abundance to support the populations of Najas flexilis. Fringing habitat: area and Hectares Maintain the area and condition of fringing habitats necessary to condition support the populations of Najas flexilis. Killarney Shad Distribution Occurrence Widespread recording during appropriate fish sampling operations (e.g. netting, hydroacoustics); access into inflowing and outflowing rivers for potential spawning migrations. Population structure: age Number of age classes Full range of age classes present. classes Extent and distribution of m² and occurrence No decline in extent and distribution of spawning habitats. spawning habitat Water quality: oxygen levels Milligrammes per litre No lower than 5mg/l. Spawning habitat quality: Occurrence Maintain stable gravel substrate with very little fine material, free of filamentous algae; filamentous algal (macroalgae) growth and macrophyte (rooted macrophytes; sediment. higher plants) growth.
5162555DG0025 | 3 | 19/03/2021 Atkins | 5162555DG0025 rev 3 - Derryreag NIS.docx Page 36 of 54
6.2.4. In-combination Impacts
In-combination impacts with the following plans and projects were considered during the preparation of this report. The search of Kerry County Council was based on a map-based search.
Kerry County Development Plan sets out strategies and objectives to provide sustainable development within Co. Kerry. The Plan contains a number of natural heritage and biodiversity policies, which includes the protection of international and national designated sites, protect existing green infrastructure and provide additional green infrastructure, and the eradication of invasive species. A Natura Impact Report was prepared for the Plan, which assessed the Plan regarding its potential to adversely affect the integrity of European sites. The findings of the AA were integrated into the Plan, ensuring that potential adverse effects have been and will be avoided, reduced or offset. Thus, an AA determination was made by Kerry County Council that the Plan is not foreseen to have any adverse effects on the ecological integrity of any European Site. The current NIS is being prepared to ensure that the proposed project will not have an adverse impact on the integrity of European sites. Given the elements outlined above, the County Development Plan is not anticipated to act in-combination with the proposed project.
There have been no projects that have been granted planning in the immediate vicinity of Derryreag culvert. Projects that have been granted planning permission in the within the River Flesk catchment, i.e. downstream of Derryreag culvert, include the construction of new domestic dwellings and associated septic tanks and percolation areas, extensions to residential dwellings, retention of existing developments, typically extensions to domestic dwellings, or the construction of new domestic dwellings or extensions to such dwellings. Regarding potential impacts to water quality, these projects will have to comply with the EPA’s Code of Practice for Wastewater Treatment Systems for Single Houses (EPA, 2009; 2018).
The 3 Groupings of culverts proposed for repair works in the Munster region (Table 1-1) are located in the WFD catchments Tralee Bay – Feale, Suir, and Laune – Maine – Dingle Bay respectively. The proposed project is located in the Laune – Maine – Dingle Bay catchment. The culverts in Group 1 and Group 2 are located in separate WFD catchments to Group 3 and these WFD catchments do not drain to the Killarney National Park, Macgillycuddy's Reeks and Caragh River Catchment SAC. There are 3 culverts being progressed in Group 3, which also carry the N22 over tributaries of the River Flesk. These culverts will also be subject to AA and a NIS will be prepared for the proposed reinstatement of invert linings on these culverts. Mitigation measures will be detailed to ensure no residual effects and as such, there will be no adverse effect on the SAC. Therefore, in- combination effects between the proposed project and other proposed culvert projects will not occur.
Farmers and landowners may also undertake general agricultural operations in areas adjacent to the proposed works and along the river, which could potentially give rise to impacts of a similar nature to those arising from the proposed works. This could potentially result in additional an increased risk to water quality. Many agricultural operations are periodic, not continuous in nature, and qualify as a Notifiable Action that requires consultation with National Parks and Wildlife Service in advance of the works e.g. reclamation, infilling or land drainage within 30m of the river, removal of trees or any aquatic vegetation within 30m of the river, and harvesting or burning of reed or willow (NPWS, 2018). Agricultural operations must also comply with the EC (Environmental Impact Assessment) (Agriculture) Regulations 2011 and amendment 2017 S.I. No. 456/2011 and 407/2017 in relation to activities covered by the regulations: - • restructuring of rural land holdings, • commencing use of uncultivated land or semi-natural areas for intensive, • land drainage works on lands used for agriculture.
A Natura Impact Statement (NIS) is required under Regulation 9 if it is likely to have a significant effect on a European designated site. The drainage or reclamation of wetlands is controlled under the Planning and Development (Amendment) (No. 2) Regulations 2011 and the European Communities (Amendment to Planning and Development) Regulations 2011. Therefore, the in-combination effects of agricultural operations and the proposed project are not likely to be significant.
5162555DG0025 | 3 | 19/03/2021 Atkins | 5162555DG0025 rev 3 - Derryreag NIS.docx Page 37 of 54
6.3. Mitigation Measures
This section describes the mitigation measures required to ensure there are no residual effects on the integrity of the European site. Table 7-1 summaries how these mitigation measures will result in no adverse effect on the integrity of European sites.
6.3.1. General Measures
1. An Ecological Clerk of Works (ECoW) will be appointed and will supervise all aspects of the critical works on site, in particular initial site set up, dam/ silt fence installation, pouring of concrete and use of chemicals. The ECoW will be a suitably qualified and experienced ecologist, which will be appointed by TII. The ECoW will ensure compliance of mitigation measures on site and liaise with IFI and NPWS staff where required.
2. A pre-construction survey for otter will be carried out upstream and downstream of the culvert within one month of commencement of works on site.
3. In accordance with the NRA guidelines, the following guidelines shall be followed: -
• No physical damage or disturbance to an otter holt shall occur.
• No works shall be undertaken within 150m of any holt at which breeding females or cubs are present.
• No wheeled or tracked vehicles should be used within 20m of an active non-breeding holt.
4. If an otter holt is recorded during the pre-construction survey and is likely to be damaged or disturbed by the proposed works, a derogation licence will be applied for from NPWS. Any further mitigation measures required by the derogation licence shall be implemented.
5. The proposed works shall be carried out during July 1st to September 30th inclusive.
6. The site manager shall monitor the 10-day weather forecast. The works shall not take place during high river flows or prior to forecasts of heavy rainfall. High river flows constitute river flows that will top the dams or will be in excess of pumping capabilities. If such conditions are forecast, the works area shall be secured and all materials, including the elements of the dam system (sandbags, silt fences, pumps and associated pipes and silt socks) will removed from the works area and riverbanks. Upon subsidence of flows, the dam system shall be re-instated upstream and downstream of the culvert and the works area de-watered before works can re-commence. This shall be supervised by the ECoW.
7. A Temporary Traffic Management zone will be created within the road corridor. This shall be used for parking and deliveries of materials.
8. All site staff will be informed of best practice methodologies to be employed on site via the dissemination of a tool-box talk. This shall include the requirement for protection of aquatic habitats, the sensitivity of the SAC and the presence of Japanese knotweed immediately downstream of the culvert.
9. Works will be carried out during day-time hours, except in the event of an emergency.
10. Any chemical, fuel and oil stores will be located on an impervious base within a secured bund with a storage capacity 110% of the stored volume.
11. Biodegradable oils and fuels will only be used.
12. Drip trays will be placed underneath any standing machinery to prevent pollution by oil/fuel leaks. Where practicable, refuelling of vehicles and machinery will be carried out on an impermeable surface in one designated area well away from any watercourse or drainage (at least 20m).
5162555DG0025 | 3 | 19/03/2021 Atkins | 5162555DG0025 rev 3 - Derryreag NIS.docx Page 38 of 54
13. Emergency spill kits will be available on site and staff will be trained in their use. A reporting system will be established on site to record accidents and/or spillages on site and the resultant action taken to remedy the incident.
14. Operators will check all equipment, machinery and vehicles on a daily basis before starting work to confirm the absence of leakages. Any leakages should be reported immediately and addressed.
15. Daily checks will be carried out and records kept on a weekly basis and any items that have been repaired/replaced/rejected noted and recorded. Any items of plant machinery found to be defective will be removed from site immediately or positioned in a place of safety until such time that it can be removed. All items of plant will be checked prior to use before each shift for signs of wear/damage.
6.3.2. Specific Measures
16. A dry working area will be achieved by setting up a dam system. There shall be three dams in total; one upstream of the culvert and two downstream of the culvert. Each dam will consist of tightly packed sandbags that are filled with clean sand. The sandbags will be double lined and individually sealed. Only sealed sandbags will be used to create the dams. No clay or soil material is permitted to ‘seal’ the sandbag dams. If needed, a geotextile membrane will be used to enhance the seal of the dams.
17. The integrity of the sandbag dams must be monitored to ensure that the works area is isolated from the live channel. This shall be monitored by the site manager twice daily; in the morning before the commencement of works and at the end of the day prior to leaving site.
18. Two silt fences shall be installed between the two sandbag dams situated downstream of the culvert. Any water pumped into this dammed area shall be in advance of the silt fences. Thus, all water pumped from the work area must pass through both silt fences before re-entering the river.
19. The pipe used to flume flows through the works area will be fitted with a filter to ensure no fish enter the pipe. The outfall of the pipe will be fitted with a silt sock. The silt sock shall be changed and/ or cleaned at regular intervals. The interval for replacing the silt sock will be dependent on the turbidity of the watercourse and therefore this shall be monitored by the site manager twice daily at a minimum; in the morning before the commencement of works and at the end of the day prior to leaving site.
20. The temporary working platform, i.e. terram and 300m thick class 6F granular capping, must be clean and free of any foreign debris before being installed on the existing riverbed gravels.
21. There can be no entry of debris and / or waste material from the works area to the live channel. The debris must be collected within the dry work area, removed from the work area and disposed of appropriately off site at Conhor Construction tip in Ballincollig, Cork.
22. Powerwashing of the culvert will not involve any water abstraction from the river. Water will be brought to site in a bowser by the Contractor. Power washing can only take place when the sandbag dam system and silt fences are in place. The wash unit generator will be positioned on the road and the lance hose will run down the bank into the work area.
23. Any water arising in the work area, as a result of power washing or seepage through the upstream dam, will be pumped from the working area into the area between the two downstream dams in advance of the silt fences. The pump will be located on the temporary working platform and fitted with a drip tray. All associated pipes will be fitted with a silt sock and/ or de-watering bag.
24. Primer products shall be applied to surfaces in the morning of a workday. This is to ensure that the required 6-hour curing time can be achieved before leaving the site at the end of the day. Primer products shall not be applied to surfaces within 48 hours of a heavy rain forecast.
25. Only quantities of primer products required for use in that working day shall be available at the site. These shall be kept is a bunded container located at least 20m from the watercourse until required for use.
5162555DG0025 | 3 | 19/03/2021 Atkins | 5162555DG0025 rev 3 - Derryreag NIS.docx Page 39 of 54
26. The Shotcrete pump will be located on the road above the work area. The integrity of pump hoses must be checked prior to commencing works Pump hoses will be located within the dry work area to ensure no spillage of concrete to the live channel.
27. At no point will any equipment be washed out within the work area or adjacent to a watercourse.
28. Sandbag dam no. 3 and the silt fences shall be left in place until any sediment plume has dissipated.
29. The gravel area on which the temporary working platform was located will be loosened, as it may have been compacted during the works. This area will be reinstated with washed and clean gravel.
30. All material used on site, including the sandbags, silt fences, silt socks, de-watering bags and components of the temporary working platform, will be removed from site and disposed of at Conhor Construction tip in Ballincollig.
6.3.3. Biosecurity protocols
Japanese knotweed is present on the upstream and downstream sides of Derryreag culvert. The stands of Japanese knotweed will be cordoned off and signage erected to denote that it is an area where no access is permitted. A minimum buffer of 7m shall be provided around the outermost edges of the stand. No access to these areas will occur during the proposed project. The Contractor has confirmed that the stands located at the top of the riverbanks upstream of the culvert will not be interfered with as part of the works and a 7m buffer around these stands is achievable during the works.
Facing downstream, the downstream right bank is the only bank that does not contain Japanese knotweed. This riverbank is the only riverbank to be used for the transport of sand bags or any other materials by personnel on foot to and from the carriageway and culvert. Access to the works area will be via the downstream right bank only.
A stand of Japanese knotweed is present on the downstream left riverbank. This stand is adjacent to the watercourse and within 7m of the works area. A 7m area will be fenced off, with the river side of the stand fenced- off along the edge of the watercourse. A tarpaulin sheet will be placed over the plant and tied down with rope, which will be attached to stone weights. Care will be taken not to break any parts of the Japanese stand while putting the tarpaulin sheet in place. This area will not be disturbed during the works. After the works, the tarpaulin must be inspected to make sure it is clean and free of any plant material before being removed from the site.
A pre-construction invasive species survey will be conducted prior to the commencement of works on site. If any further invasive species are recorded, these shall be fenced off using a 7m buffer from the outermost edges of the invasive species plant(s).
Biosecurity protocols shall be implemented during the construction phase of the proposed project to prevent the introduction of invasive species listed on the third schedule of the EC (Birds and Natural Habitats) Regulations 2011 to site and the further spread of diseases.
1. All equipment intended to be used at the site shall be dry, clean and free from debris prior to being brought to site.
2. If drying out of equipment is not feasible, equipment should be either: -
i. power steam washed at a suitably high temperature or at least 65 degrees, or
ii. disinfected with an approved disinfectant, e.g. Virkon or an iodine-based product. It is important that the manufacturer’s instructions are followed and if required, the correct contact times are allowed for during the disinfection process. Items that are difficult to soak should be sprayed or wiped down with disinfectant.
3. During the duration of the proposed project, if equipment is removed off-site to be used elsewhere, the said equipment shall be cleaned and disinfected prior to being brought back to the works area of the proposed project.
5162555DG0025 | 3 | 19/03/2021 Atkins | 5162555DG0025 rev 3 - Derryreag NIS.docx Page 40 of 54
4. Appropriate facilities shall be used for the containment, collection and disposal of material and/or water resulting from washing facilities of vehicles, equipment and personnel.
5. Importation of materials shall comply with Regulation 49 of the EC (Birds and Natural Habitats) Regulations 2011.
5162555DG0025 | 3 | 19/03/2021 Atkins | 5162555DG0025 rev 3 - Derryreag NIS.docx Page 41 of 54
7. Conclusions
This NIS provides the competent authority with supporting information to undertake the Appropriate Assessment in relation to the proposed project at Derryreag Culvert, Co. Kerry, and its potential indirect impacts via surface water pathways on the Killarney National Park, Macgillycuddy's Reeks and Caragh River Catchment SAC.
The NIS has examined the potential impacts of the proposed project on the integrity of the SAC, alone and in combination with other plans and projects, taking into account the site’s structure, function and conservation objectives. Where potentially significant effects were identified, mitigation measures have been recommended to assist in offsetting these effects.
Following a comprehensive evaluation of the potential direct, indirect and cumulative impacts on the qualifying interests for the SAC, and the implementation of the proposed mitigation measures, it has been concluded by the authors of this report that there will be no residual impacts and the proposed project will not have an adverse effect on the integrity of Killarney National Park, Macgillycuddy's Reeks and Caragh River Catchment SAC.
To confirm this conclusion, the following checklist taken from DEHLG (2009) has been completed.
Table 7-1 Checklist of Site Integrity (DEHLG, 2009).
Does the project or plan have the potential to:- Y/N
Cause delays in progress towards achieving the N - Following mitigation, no residual effects have been identified conservation objectives of the sites? that will prevent achievement of the conservation objectives of the Killarney National Park, Macgillycuddy's Reeks and Caragh River Catchment SAC. Interrupt progress towards achieving the N - Following mitigation, no residual effects have been identified conservation objectives of the sites? that will prevent achievement of the conservation objectives of the SAC.
Disrupt those factors that help to maintain the N - Potential impacts, including potential changes to water favourable conditions of the site? quality issues and pollution, can be avoided or mitigated against.
Interfere with the balance, distribution and density of N - Potential impacts can be avoided by implementing a range of key species that are the indicators of the favourable measures to maintain water quality and thus protect the surface condition of the site? water dependent species of the SAC.
Cause changes to the vital defining aspects (e.g. N - Potential impacts from sediment mobilisation and pollution, nutrient balance) that determine how the site which could impact upon ecosystem functioning, can be functions as a habitat or ecosystem? effectively mitigated.
Change the dynamics of the relationships (between, N - Potential impacts relating to changes in the physical and for example, soil and water or plants and animals) hydrological regime of the SAC will not occur as a result of the that define the structure and/or function of the site? project and therefore will not impact on the functioning of the SAC.
Interfere with predicted or expected natural changes N - Potential impacts from changes to the physical and to the site (such as water dynamics or chemical hydrological regime will not occur and therefore will not impact composition)? upon the functioning of the SAC.
Reduce the area of key habitats? N – Following mitigation, there will be no loss of habitats within the SAC.
Reduce the population of key species? N – Following mitigation, there will be no adverse disturbance impacts to key species of the SAC. Mitigation measures will ensure that the works will not cause a deterioration in water quality.
Change the balance between key species? N – Following mitigation, there will be no adverse disturbance impacts to species of the SAC. Mitigation measures will ensure that the works will not cause a deterioration in water quality.
Reduce diversity of the site? N - The identified mitigation measures during the construction phase of the project to mitigate disturbance impacts and protect
5162555DG0025 | 3 | 19/03/2021 Atkins | 5162555DG0025 rev 3 - Derryreag NIS.docx Page 42 of 54
Does the project or plan have the potential to:- Y/N water quality will ensure that the current diversity of the SAC is maintained.
Result in disturbance that could affect population N – Following mitigation, there shall be no residual disturbance size or density or the balance between key species? impacts to species of the SAC and therefore, population size and density will not be reduced.
Result in fragmentation? N - The proposed works will not result in the fragmentation of habitats within the SAC or surrounding habitat.
Result in loss or reduction of key features? N – There shall be no loss or reduction of key features within the SAC.
5162555DG0025 | 3 | 19/03/2021 Atkins | 5162555DG0025 rev 3 - Derryreag NIS.docx Page 43 of 54
References
Bell, A.M., Baier, R., Kocher, B., Reifferscheid, G., Buchinger, S. and Ternes, T. (2020) Ecotoxicological characterization of emissions from steel coatings in contact with water. Water Research. 173, 2020, 115525. https://www.sciencedirect.com/science/article/pii/S0043135420300610. CIEEM (2018). Guidelines for Ecological Impact Assessment in the UK and Ireland: Terrestrial, Freshwater, Coastal and Marine. Version 1.1. Chartered Institute of Ecology and Environmental Management, Winchester. Cooper, L. M. (2004). Guidelines for Cumulative Effects Assessment in SEA of Plans, EPMG Occasional Paper 04/LMC/CEA, Imperial College London. CRFB (2008) SWRFB Rivers. Sampling Fish for the Water Framework Directive – Rivers 2008. The Central and Regional Fisheries Boards. Dublin, Ireland. DoEHLG (2009). Appropriate Assessment of Plans and Projects in Ireland: Guidance for Planning Authorities. National Parks and Wildlife Service, Department of the Environment, Heritage and Local Government. Dublin. EPA (2009). Code of Practice; Wastewater Treatment Systems and Disposal Systems serving Single Houses (p.e. ≤10). Environmental Protection Agency, Co. Wexford, Ireland. EPA (2018). Code of Practice, Domestic Waste Water Treatment Systems (Population Equivalent ≤10) Draft 26 November 2018. Environmental Protection Agency, Ireland. European Commission (2001). Assessment of Plans and Projects significantly affecting Natura 2000 Sites: Methodological guidance on the provisions of Article 6(3) and (4) of the Habitats Directive 92/43/EEC. European Commission (2017). Managing Natura 2000 Sites: The Provisions of Article 6 of the ‘Habitats’ Directive 92/43/EEC. European Union Habitats Directive, (1992). Council Directives 92/43/EEC of 21 May 1992 on the conservation of natural habitats and of wild fauna and flora. NPWS (2012) Site Synopsis. Mullaghanish to Musheramore Mountains SPA. [004162]. Version 25/01/2012. Department of Culture, Heritage and the Gaeltacht. NPWS (2013) Site Synopsis. Killarney National Park, Macgillycuddy's Reeks and Caragh River Catchment SAC. [000365]. Version date 20/08/2013. Department of Culture, Heritage and the Gaeltacht. NPWS (2014) Site Synopsis. Killarney National Park SPA [004038]. Version 07/07/2014. Department of Culture, Heritage and the Gaeltacht. NPWS (2017) Conservation Objectives: Killarney National Park, Macgillycuddy's Reeks and Caragh River Catchment SAC 000365. Version 1. National Parks and Wildlife Service, Department of Culture, Heritage and the Gaeltacht. NRA (2009) Survey Guidelines for National Road Schemes. National Roads Authority. Dublin, Ireland. Reid, N., Hayden, B., Lundy, M.G., Pietravalle, S., McDonald, R.A. & Montgomery, W.I. (2013) National Otter Survey of Ireland 2010/12. Irish Wildlife Manuals No. 76. National Parks and Wildlife Service, Department of Arts, Heritage and the Gaeltacht, Dublin, Ireland. Scott Wilson and Levett-Therivel, (2006). Appropriate Assessment of Plans. Scott Wilson, Levett-Therivel Sustainability Consultants, Treweek Environmental Consultants and Land Use Consultants. Smith, G.F, O’Donoghue, P., O’Hora, K. & Delaney, E. (2011) Best Practice Guidance for Habitat Survey and Mapping. The Heritage Council. Kilkenny, Ireland.
5162555DG0025 | 3 | 19/03/2021 Atkins | 5162555DG0025 rev 3 - Derryreag NIS.docx Page 44 of 54
Appendices
5162555DG0025 | 3 | 19/03/2021 Atkins | 5162555DG0025 rev 3 - Derryreag NIS.docx Page 45 of 54
Appendix A. Design Detail
5162555DG0025 | 3 | 19/03/2021 Atkins | 5162555DG0025 rev 3 - Derryreag NIS.docx Page 46 of 54
Section 1-03 GENERAL NOTES 100 1. ALL DIMENSIONS ARE IN MILLIMETRES UNLESS NOTED OTHERWISE
2. ONLY WRITTEN DIMENSIONS SHALL BE USED. NO UNNAMED STREAM DIMENSIONS SHALL BE SCALED FROM THE DRAWINGS
3. ALL LEVELS ARE IN METRES AND ARE TO MALIN HEAD DATUM
4. ALL COORDINATES ARE IN METRES AND ARE TO IRISH TRANSVERSE MERCATOR
5. DRAWINGS ARE TO BE READ IN CONJUNCTION WITH THE SPECIFICATION
DRAWING NOTES
1. FOR RIVER CROSS SECTIONS 1-01 TO 1-14, REFER TO TOPOGRAPHICAL SURVEY DRAWINGS 10 0
Flow Section 1-04 A1
G189.82 189.78 189.83
189.98189.97
190.05
190.09 "
190.20
190.30 190.31
190.34 190.37 190.37 190.44 " 190.48 190.44
190.53 G 190.46 190.53 190.49 190.58 190.61 " 190.62 190.63
190.75 190.76 190.77 " 190.76190.76 190.79
190.87 190.90 190.90 1-05 190.94
" 191.02 191.04 191.07 191.03 " 191.06 191.09 G 191.14 191.11 191.17 191.17 191.19 Section
191.31 191.32 191.35 191.35
191.36 " 191.44 191.41 191.45 191.47 191.52 " S1 191.50 512195.455 581930.648 191.421 191.62 N22 To 191.61 191.62 191.75
191.72 " G 191.69 191.71 191.74 191.76 191.74 " " 184.59
191.72 Section 1-06 191.84 191.89
" 191.87 191.90 191.93 192.01 185.99 185.24
191.81 191.93 " 192.04 "
185.38 191.99 DERRYREAG CULVERT 185.35
191.91 192.07 185.051 Castleisland 185.21 185.58 192.18 Water Level
187.97 Date of survey=17 October 2019 192.13 192.11 192.19 192.27 186.88 192.28 187.49 192.36 (KY-N22-028.00) 186.89 "
192.29 188.09
192.40 192.48 192.50 192.43 192.39
192.59 192.57 192.63
192.48 192.67 190.61 192.62 192.58 " Pipe Soffit 192.50 192.84 192.50 192.70 192.76 192.53 191.58 " " DO NOT SCALE 192.44" 192.58 " 192.14 192.84 193.02
192.89 192.94 191.68 192.42 192.73 192.99 192.99 193.36 " 192.83 " 192.96 192.88 193.02 193.24 G 193.23 192.99 193.10 193.32 193.48 193.75 193.04 193.09 193.16 193.26 193.21 192.89 " 193.11193.11 193.24 193.31 193.42 193.77
193.08 193.45 193.21 193.55 193.67 193.33 "
193.23 193.37 193.49 193.14 193.32 193.39 193.48 194.01 193.25
193.83 193.37193.36 193.65 193.96 193.58 193.50 193.19 193.44 193.71 194.04 " 193.37 193.64
193.50 193.71 193.86 193.53 G 193.63 193.71 "
193.77 193.91 194.20 Bottom of FenceTop of Fence 193.53 193.88 194.00 193.52 193.81 193.65 194.00 194.01 194.07 194.11 " 194.14 Top of crash barrier 193.95 G 193.85 193.58 193.76 194.07 194.32 " 194.15 193.89 194.15
194.09
193.93 194.33 Base of crash barrier 194.04 194.29 194.37
194.07 194.42 " 193.95 194.50
194.26 193.92193.93 194.56 "" 194.62 194.71 193.87 194.20 194.49 " 194.70G 194.41 193.95 194.67 194.47 194.84 194.33 194.84 194.85 "
194.33 194.99 194.19 C2 194.77 194.45 194.13 " 194.99 " 194.18 194.38 512275.539 194.68 N22 To 581893.417 195.20 194.46 " 194.429 195.13 194.59 " 194.45 194.49 194.40 194.52 194.76 195.36 195.04 195.27 195.30 194.90 " Abbeyfeale 194.57 194.74 194.65 G 195.37 194.66 194.98 195.41 194.48 194.53 194.74 194.85 195.06 195.61 195.31 195.55 194.44 194.93 "
194.23 195.68 195.66 194.69 194.77 195.01 194.59 194.79 " C1 195.69 194.70 512287.935 195.27 194.80 581889.213 195.30 195.91 195.97 195.15 194.81 194.866 " 194.73 194.74 195.65 195.94 194.85 195.05 195.43 Base of crash barrier G 194.88 195.25 196.07 193.56 Top of crash barrier 195.02 195.95 196.07 194.97 " " 196.17 194.98 195.87 195.39 195.62 Bottom of Fence 195.09 Top of Fence 195.29 196.34 195.77 196.45 196.46 195.20 195.51 195.76 196.09 " 196.64
188.09 196.61 " 196.76 187.99 (invert level) 194.37 195.92 Water Level 195.68 G 196.70 196.32 " 193.30Date of survey=16 October 2019 196.01 196.62 196.79 Pipe Soffit 196.04 196.96
194.36 195.50 195.82 " 188.65 " 196.14 197.04 196.18 196.55 197.03 195.72 195.93 197.18 197.23 196.31 188.20 197.33 196.07 G 196.41 197.35 194.04 193.43 193.22 196.87 197.28 196.13 Pipe Invert T1 196.47 diam=0.30 m 512314.479195.84 196.20 " 581881.238 195.92 196.27 196.58 188.33 " 196.65 197.13 195.811 196.34 196.40 196.74 Section 1-07 196.22 197.38 196.48
196.21 196.55 196.97 197.54 188.46 " 196.98 196.62 196.68 192.36 197.13 196.46 196.71 197.22
Pipe Soffit 194.07 196.76 diam=0.30 m 196.81 197.33 197.38 188.79 196.89 Water Level 196.95 Date of survey=16 October 2019 197.57 188.65 196.73 197.02 197.54 196.81 " 197.68 197.75 197.16 197.77 197.21 197.29 197.35 197.07 197.50 197.56 197.62 193.95 197.70 194.36 197.19 193.29 197.35 197.76 " 197.20 " 197.88 197.97 198.00 197.67
197.66 CO-ORDINATES " 197.87 197.94 " 198.13
198.15 N = 581,900.244 Section 1-08 " E = 512,278.556
N22 NATIONAL PRIMARY ROAD
1-09 Section
Section 1-10
Section 1-11
Section UNNAMED STREAM 1-12
Flow
ISSUED FOR REVIEW
© ORDNANCE SURVEY IRELAND LICENSE NR. to 0233.dwg AR 0082518. ORDNANCE SURVEY IRELAND & TRANSPORT INFRASTRUCTURE DERRYREAG CULVERT (KY-N22-028.00) GOVERNMENT OF IRELAND IRELAND (TII) REMEDIAL WORKS ATKINS NOT TO BE HELD LIABLE FOR THE USE EXISTING SITE LAYOUT PLAN OF THIS DATA ON ANY PROJECT OTHER THAN THE MUNSTER BRIDGES TERM MAINTENANCE CONTRACT NR.3 PROJECT AOS MG MJ 1:500 18/11/19 18/11/19 18/11/19 A REVIEW COMMENTS INCORPORATED AOS 05/20 MJ MJ MUNSTER BRIDGES TERM May 20, 2020 - 12:36pm - ISSUED FOR REVIEW AOS 11/19 MG MJ MAINTENANCE CONTRACT NR.3 Date: File: 5162555-HTR-DR-0230 P 5162555 / HTR / DR / 0230 A
V:\5162555\6 Dwgs-Graphics\61 AutoCad\5162555-HTR-DR-0230 to 0233.dwg 184.24 187.09 188.53 190.01 190.17 GENERAL NOTES 100 190.48 190.73 1. ALL DIMENSIONS ARE IN MILLIMETRES UNLESS 191.10 NOTED OTHERWISE 191.60 2. ONLY WRITTEN DIMENSIONS SHALL BE USED. NO 191.36 184.59 191.52 UNNAMED STREAM DIMENSIONS SHALL BE SCALED FROM THE 191.43 191.29 DRAWINGS
191.17 Flow 191.01
192.01 187.97 185.99 185.24 3. ALL LEVELS ARE IN METRES AND ARE TO MALIN 187.96 HEAD DATUM "
185.38
185.35 187.30 190.22 4. ALL COORDINATES ARE IN METRES AND ARE TO EXISTING FENCING 185.051 188.74 185.21 185.58 IRISH TRANSVERSE MERCATOR 192.18 Water Level Date of survey=17 October 2019 C 191.28 187.97 191.15 0233 191.34 5. DRAWINGS ARE TO BE READ IN CONJUNCTION WITH 192.27 186.88 191.52 191.61 192.28 187.49 THE SPECIFICATION 192.36 191.81
186.89 192.23 " 192.58 EXISTING CONCRETE VERGE 188.09 192.40 192.40 192.48 192.50 10 192.59 192.57 192.63 0 192.67 190.61 192.62 " Pipe Soffit 192.64 192.70 192.71 192.76 192.84
191.58
192.14 192.84 193.02
192.89 192.94 191.68 192.99 192.99 193.36 192.83 A1 192.90 " 192.96 193.20 192.88 192.92 193.02 G 193.24 193.23 192.89 192.99 193.10 193.27 193.32 193.48 193.75 193.04 193.09 193.16 193.26 193.21 193.50 193.59 193.11193.11 193.11 193.24 193.31 193.42 193.77
193.08 193.45 193.21 193.22 193.55 193.05 193.67 193.55 193.13 193.33 " 193.64 193.23 193.37 193.49 193.68 193.14 193.32 193.39 193.68 193.48 194.01 193.25
193.83 193.37193.36 193.65 193.75 193.49 193.80 193.96 A 193.58 193.50 193.19 193.30 193.44 193.71 194.04 " 193.37 193.46 193.64 193.40 0232 193.50 193.71 193.86 193.53 G 193.63 193.71 "
193.77 193.91 193.45 Bottom of FenceTop of Fence EXISTING ROAD SAFETY BARRIER 193.53 194.20 193.88 194.00 193.52 193.70 193.81 193.88 193.65 194.00 194.01 194.07 194.11
DO NOT SCALE " 194.14 193.73 Top of crash barrier 193.95 G 193.85 193.58 193.76 194.07 194.32 " 194.15 193.89 194.15
194.09
193.91 194.03 194.17 193.93 194.33 193.89 194.29 Base of crash barrier 194.04 194.37 193.81 194.07 194.42 " 193.95 194.34 194.50
194.26 193.92193.93 194.56 "" 194.62 194.36 194.71 193.87 194.20 194.49 194.14 " 194.26 194.70G 194.41 193.95 194.67 194.47 194.84 194.33 194.69 194.84 194.85 " 194.59 194.33 194.99 194.19 C2 194.77 194.13 194.45 " 512275.539 194.87 194.99 " 194.18 194.38 194.68 581893.417 194.58 195.20 194.46 194.40 " 194.429 195.13 194.59 " 194.45 194.49 194.40 194.76 194.52 194.88 195.04 195.27 DERRYREAG CULVERT 194.90 194.57 194.74 194.53 194.65 (KY-N22-028.00) 194.83 194.66 194.98 194.48 194.53 194.74 194.85 195.10 194.78 195.06 194.63 195.31 194.44 194.93
194.23
194.69 194.77 195.01 194.59 194.79 " C1 194.78 194.70 194.81 512287.935 195.27 194.80 196.08 195.30 581889.213 195.01 195.44 195.15 194.81 194.866 194.73194.74 194.85 195.05 195.43 Base of crash barrier 194.58 194.88 195.25 193.56 Top of crash barrier 195.02 195.37 194.97 " EXISTING CONCRETE VERGE 194.30 194.96 194.64 194.98 195.23 193.94 195.39 195.62 Bottom of Fence 195.09 194.04 Top of Fence 195.29 193.84 195.61 195.20 195.51 193.47 193.23 188.09 187.99 (invert level) 194.37 193.24 Water Level 195.68 193.30Date of survey=16 October 2019 195.59 Pipe Soffit
194.36 195.50 195.82 188.65 " 195.78 192.39 195.72 195.93
188.20 193.04
194.04 193.43 193.22 191.88 Pipe Invert T1 diam=0.30 m EXISTING ROAD SAFETY BARRIER 512314.479195.84 " 581881.238 195.92 188.33 " B 195.811 193.78 0232
193.87 188.46
193.98 192.36 Pipe Soffit 193.92 194.07 D diam=0.30 m 193.55 188.79 193.52 Water Level 0233 Date of survey=16 October 2019 188.65 193.27 194.73 194.90 195.14 UNNAMED STREAM 193.95 195.35 194.36
193.29
Flow
ISSUED FOR REVIEW
© ORDNANCE SURVEY IRELAND LICENSE NR. to 0233.dwg AR 0082518. ORDNANCE SURVEY IRELAND & TRANSPORT INFRASTRUCTURE DERRYREAG CULVERT (KY-N22-028.00) GOVERNMENT OF IRELAND IRELAND (TII) REMEDIAL WORKS ATKINS NOT TO BE HELD LIABLE FOR THE USE EXISTING STRUCTURE LAYOUT PLAN OF THIS DATA ON ANY PROJECT OTHER THAN THE MUNSTER BRIDGES TERM MAINTENANCE CONTRACT NR.3 PROJECT AOS MG MJ 1:125 18/11/19 18/11/19 18/11/19 A REVIEW COMMENTS INCORPORATED AOS 05/20 MJ MJ MUNSTER BRIDGES TERM May 20, 2020 - 12:38pm - ISSUED FOR REVIEW AOS 11/19 MG MJ MAINTENANCE CONTRACT NR.3 Date: File: 5162555-HTR-DR-0230 P 5162555 / HTR / DR / 0231 A
V:\5162555\6 Dwgs-Graphics\61 AutoCad\5162555-HTR-DR-0230 to 0233.dwg GENERAL NOTES 100 1. ALL DIMENSIONS ARE IN MILLIMETRES UNLESS NOTED OTHERWISE
2. ONLY WRITTEN DIMENSIONS SHALL BE USED. NO DIMENSIONS SHALL BE SCALED FROM THE DRAWINGS
3. ALL LEVELS ARE IN METRES AND ARE TO MALIN CARRIAGEWAY CENTRELINE HEAD DATUM
4. ALL COORDINATES ARE IN METRES AND ARE TO IRISH TRANSVERSE MERCATOR
5. DRAWINGS ARE TO BE READ IN CONJUNCTION WITH THE SPECIFICATION 191.982m
SURVEYED WATER LEVEL 186.948m 10 0 A1 186.823m
DO NOT SCALE SECTION A SCALE 1:100 0231
Carriageway CL
ROAD SAFETY BARRIER 14692 2874 3923 3504 3275 852 H/S WESTBOUND EASTBOUND EASTBOUND H/S ROAD SAFETY BARRIER EXISTING FENCE
EXISTING FENCE
193.302m
190.625m
188.243m
185.198m
39953
SECTION B SCALE 1:100 0231
ISSUED FOR REVIEW
© ORDNANCE SURVEY IRELAND LICENSE NR. to 0233.dwg AR 0082518. ORDNANCE SURVEY IRELAND & TRANSPORT INFRASTRUCTURE DERRYREAG CULVERT (KY-N22-028.00) GOVERNMENT OF IRELAND IRELAND (TII) REMEDIAL WORKS ATKINS NOT TO BE HELD LIABLE FOR THE USE EXISTING SECTIONS A AND B OF THIS DATA ON ANY PROJECT OTHER THAN THE MUNSTER BRIDGES TERM MAINTENANCE CONTRACT NR.3 PROJECT AOS MG MJ 1:100 18/11/19 18/11/19 18/11/19 A REVIEW COMMENTS INCORPORATED AOS 05/20 MJ MJ MUNSTER BRIDGES TERM May 20, 2020 - 12:39pm - ISSUED FOR REVIEW AOS 11/19 MG MJ MAINTENANCE CONTRACT NR.3 Date: File: 5162555-HTR-DR-0230 P 5162555 / HTR / DR / 0232 A
V:\5162555\6 Dwgs-Graphics\61 AutoCad\5162555-HTR-DR-0230 to 0233.dwg GENERAL NOTES 100 1. ALL DIMENSIONS ARE IN MILLIMETRES UNLESS NOTED OTHERWISE EDGE OF CARRIAGEWAY 2. ONLY WRITTEN DIMENSIONS SHALL BE USED. NO DIMENSIONS SHALL BE SCALED FROM THE EDGE OF CARRIAGEWAY DRAWINGS
3. ALL LEVELS ARE IN METRES AND ARE TO MALIN HEAD DATUM
4. ALL COORDINATES ARE IN METRES AND ARE TO IRISH TRANSVERSE MERCATOR SURVEYED WATER LEVEL 185.002m 5. DRAWINGS ARE TO BE READ IN CONJUNCTION WITH THE SPECIFICATION 190.576m 10 0 A1
DATUM = 182.000mOD
Offset (m) 22.130 29.492 -31.025 -28.127 -23.658 -18.220 -12.923 -8.353 -2.635 0.000 3.524 8.773 14.993
Level (mOD) 191.355 191.516 191.271 190.994 187.952 187.936 186.442 184.813 186.430 188.733 191.212 191.520 191.864 DO NOT SCALE SECTION C SCALE 1:100 0231
EDGE OF CARRIAGEWAY
EDGE OF CARRIAGEWAY SURVEYED WATER LEVEL 188.390m
193.352m
DATUM = 185.000mOD
Offset (m) -33.315 -28.334 -21.333 -16.436 -12.132 -6.842 -4.785 -3.668 0.000 3.325 6.469 22.840 26.043 13.448 18.272
Level (mOD) 193.792 193.880 193.991 193.934 193.566 193.501 192.535 192.178 188.665 192.331 194.232 194.741 194.919 195.512 195.360
SECTION D SCALE 1:100 0231
ISSUED FOR REVIEW
© ORDNANCE SURVEY IRELAND LICENSE NR. to 0233.dwg AR 0082518. ORDNANCE SURVEY IRELAND & TRANSPORT INFRASTRUCTURE DERRYREAG CULVERT (KY-N22-028.00) GOVERNMENT OF IRELAND IRELAND (TII) REMEDIAL WORKS ATKINS NOT TO BE HELD LIABLE FOR THE USE EXISTING SECTIONAL ELEVATIONS C AND D OF THIS DATA ON ANY PROJECT OTHER THAN THE MUNSTER BRIDGES TERM MAINTENANCE CONTRACT NR.3 PROJECT AOS MG MJ 1:100 18/11/19 18/11/19 18/11/19 A REVIEW COMMENTS INCORPORATED AOS 05/20 MJ MJ MUNSTER BRIDGES TERM May 20, 2020 - 12:41pm - ISSUED FOR REVIEW AOS 11/19 MG MJ MAINTENANCE CONTRACT NR.3 Date: File: 5162555-HTR-DR-0230 P 5162555 / HTR / DR / 0233 A
V:\5162555\6 Dwgs-Graphics\61 AutoCad\5162555-HTR-DR-0230 to 0233.dwg GENERAL NOTES
100 UNNAMED STREAM 1. ALL DIMENSIONS ARE IN MILLIMETRES UNLESS NOTED OTHERWISE
10000 2. ONLY WRITTEN DIMENSIONS SHALL BE USED. NO DIMENSIONS SHALL BE SCALED FROM THE
EXTENT TEMPORARY DAM Nr.3 DRAWINGS DOWNSTREAM 3. ALL LEVELS ARE IN METRES AND ARE TO MALIN
OF TEMPORARY DAM Nr.2 HEAD DATUM WORKING PLATFORM A DOWNSTREAM Flow 4. ALL COORDINATES ARE IN METRES AND ARE TO
185.24 IRISH TRANSVERSE MERCATOR
5. DRAWINGS ARE TO BE READ IN CONJUNCTION WITH
185.35 EXISTING FENCING THE SPECIFICATION
192.18 SEQUENCE OF WORKS 192.27 A 192.28 · REMOVE ANY LARGE STONES WITHIN THE WORKING
10 PLATFORM AREAS AND STORE ON SITE FOR EXISTING CONCRETE VERGE REINSTATEMENT. 192.40 0 192.48 192.50 · PLACE HEAVY DUTY TERRAM 2000 GT OR EQUIVALENT APPROVED GEOTEXTILE ON THE EXISTING STREAM BED OVER THE EXTENT OF THE 192.59 192.57 192.63 WORKING PLATFORM AREA. · PLACE WORKING PLATFORM ON THE GEOTEXTILE
190.61 CONSISTING NOMINAL 250mm THICK CLEAN GRAVEL. 192.62 Pipe Soffit 192.70 · EXCAVATE THE EXISTING STREAM BED MATERIAL
A1 192.76 WITHIN THE CULVERT. THIS MATERIAL SHALL BE STORED WITHIN THE WORKS AREA FOR
192.84 192.89 192.94 REINSTATEMENT.
192.83 · ON COMPLETION OF THE CONCRETE LINING WORKS, REMOVE THE WORKING PLATFORM AND 192.88 193.02 GEOTEXTILE. G 192.99 · REINSTATE THE EXCAVATED STREAM BED MATERIAL 193.10 WITHIN THE CULVERT AND THE LARGE STONES IN 193.04 193.09 193.16 193.48 THE STREAM BED 193.21 · ALIGN THE STREAM BED LEVEL LOCAL TO THE 193.11193.11 193.24 193.42 CULVERT ENDS WITH WASHED GRAVEL 193.08 193.21 193.45 193.67 193.33
193.23 A 193.37 193.49 193.14 0236 193.32 193.39 193.48 193.25
193.83 193.37193.36 193.65 193.58 193.50 193.44 193.71 193.37 193.64
193.50 193.71 193.53 G 193.63 193.71 193.77 DO NOT SCALE Bottom of FenceTop of Fence EXISTING ROAD SAFETY BARRIER 193.53 193.88
193.52 193.81 193.65 194.00 194.01
Top of crash barrier 193.95 G 193.76 193.85 194.07 194.15 193.89 194.15
194.09
193.93 194.33 Base of crash barrier 194.04 194.29
194.07 194.42 193.95 194.50
194.26 194.56 194.62 194.20 194.49 194.70G 194.41 194.67 194.47 194.33 194.84 194.85
194.33 194.77 194.45 194.99 194.38 194.68
195.13 194.59 194.45 194.49 194.52 194.76 195.04 195.27 DERRYREAG CULVERT 194.90 (KY-N22-028.00) 194.65 194.57 194.74 194.66 194.98 194.48 194.53 194.74 194.85 195.06 195.31 194.44 194.93
194.69 195.01 194.79
195.27 194.80 195.30
195.15 194.81 194.73 195.05 195.43 Base of crash barrier 194.88 Top of crash barrier 195.25
EXISTING CONCRETE VERGE 194.98 195.39 195.62 Bottom of Fence Top of Fence 195.29 195.51
195.68 193.30 Pipe Soffit 195.82
195.72 195.93 B 0236 EXISTING ROAD SAFETY BARRIER
192.36 Pipe Soffit diam=0.30 m WORKING PLATFORM
TEMPORARY DAM Nr.1 Flow UPSTREAM 10000 EXTENT OF
193.95 A ISSUED FOR REVIEW
© ORDNANCE SURVEY IRELAND LICENSE NR. to 0236.dwg AR 0082518. ORDNANCE SURVEY IRELAND & TRANSPORT INFRASTRUCTURE DERRYREAG CULVERT (KY-N22-028.00) GOVERNMENT OF IRELAND IRELAND (TII) PROPOSED REMEDIAL WORKS ATKINS NOT TO BE HELD LIABLE FOR THE USE SHEET 1 OF 2 - 10:27am OF THIS DATA ON ANY PROJECT OTHER THAN THE MUNSTER BRIDGES TERM MAINTENANCE CONTRACT NR.3 PROJECT AOS MG MJ 1:125 09, 2020 14/05/20 14/05/20 14/05/20 A NOTES ADDED AOS 07/20 MJ MJ MUNSTER BRIDGES TERM Jul - ISSUED FOR REVIEW AOS 05/20 MJ MJ MAINTENANCE CONTRACT NR.3 Date: File: 5162555-HTR-DR-0235 P 5162555 / HTR / DR / 0235 A
V:\5162555\6 Dwgs-Graphics\61 AutoCad\5162555-HTR-DR-0235 to 0236.dwg GENERAL NOTES 100 1. ALL DIMENSIONS ARE IN MILLIMETRES UNLESS NOTED OTHERWISE REMOVE, AND STORE FOR REINSTATEMENT, ANY EXISTING MATERIAL WITHIN THE CULVERT. OVER THE EXTENT OF THE PROPOSED LINING, CLEAN CULVERT TO ST3 QUALITY BY 2. ONLY WRITTEN DIMENSIONS SHALL BE USED. NO MECHANICAL MEANS AND COAT INSIDE OF CULVERT SURFACE TO BE LINED WITH NITROPRIME DIMENSIONS SHALL BE SCALED FROM THE DRAWINGS ZINCRICH PLUS OR EQUIVALENT APPROVED CARRIAGEWAY CENTRELINE A 3. ALL LEVELS ARE IN METRES AND ARE TO MALIN HEAD DATUM
4. ALL COORDINATES ARE IN METRES AND ARE TO IRISH TRANSVERSE MERCATOR 191.982m 5. DRAWINGS ARE TO BE READ IN CONJUNCTION WITH THE SPECIFICATION
SEQUENCE OF WORKS A · REMOVE ANY LARGE STONES WITHIN THE WORKING
10 PLATFORM AREAS AND STORE ON SITE FOR REINSTATEMENT.
0 · PLACE HEAVY DUTY TERRAM 2000 GT OR EQUIVALENT APPROVED GEOTEXTILE ON THE
1850 EXISTING STREAM BED OVER THE EXTENT OF THE WORKING PLATFORM AREA. · PLACE WORKING PLATFORM ON THE GEOTEXTILE 186.823m CONSISTING NOMINAL 250mm THICK CLEAN GRAVEL. · EXCAVATE THE EXISTING STREAM BED MATERIAL A1 WITHIN THE CULVERT. THIS MATERIAL SHALL BE STORED WITHIN THE WORKS AREA FOR REINSTATEMENT. · ON COMPLETION OF THE CONCRETE LINING WORKS, PROPOSED REMOVE THE WORKING PLATFORM AND CONCRETE LINING GEOTEXTILE. SECTION A · REINSTATE THE EXCAVATED STREAM BED MATERIAL WITHIN THE CULVERT AND THE LARGE STONES IN SCALE 1:100 0235 THE STREAM BED · ALIGN THE STREAM BED LEVEL LOCAL TO THE CULVERT ENDS WITH WASHED GRAVEL Carriageway CL PROPOSED CONCRETE LINING ROAD SAFETY BARRIER 14692 2874 3923 3504 3275 852 H/S WESTBOUND EASTBOUND EASTBOUND H/S ROAD SAFETY BARRIER EXISTING FENCE NOMINAL 250mm TEMPORARY WORKING REMOVE, AND STORE FOR REINSTATEMENT, ANY PLATFORM CONSISTING CLEAN GRAVEL EXISTING MATERIAL WITHIN THE CULVERT. ON HEAVY DUTY TERRAM 2000 GT OR OVER THE EXTENT OF THE PROPOSED LINING, CLEAN DO NOT SCALE EQUIVALENT APPROVED GEOTEXTILE EXISTING FENCE CULVERT TO ST3 QUALITY BY MECHANICAL MEANS AND ON EXISTING STREAM BED COAT INSIDE OF CULVERT SURFACE TO BE LINED WITH NITROPRIME ZINCRICH PLUS OR EQUIVALENT APPROVED 193.302m A NOMINAL 250mm TEMPORARY WORKING PLATFORM CONSISTING CLEAN GRAVEL TEMPORARY DAM ON HEAVY DUTY TERRAM 2000 GT OR Nr.1 UPSTREAM EQUIVALENT APPROVED GEOTEXTILE ON EXISTING STREAM BED 190.625m
37215
188.243m A
TEMPORARY DAM Nr.3 DOWNSTREAM TEMPORARY DAM Nr.2 DOWNSTREAM
185.198m
10000 39953
SECTION B Culvert CL EXISTING CORRUGATED CULVERT SCALE 1:100 0235
10000 CULVERT CORRUGATIONS
ON COMPLETION OF THE WORKS AND A REMOVAL OF HARDSTAND AND GEOTEXTILE, INSIDE FACE OF CULVERT ALIGN EXISTING STREAM BED WITH CULVERT CONCRETE LINING CONCRETE LINING / REINSTATED BED CORRUGATION DEPTH (VARIES) MATERIAL USING WASHED GRAVEL CONCRETE GRADE C40/50 STAINLESS STEEL A393 EXISTING STREAM VARIES 50 50 VARIES NOMINAL THICKNESS 150mm REINFORCEMENT MESH WITH STAINLESS STEEL A393 MESH BED LEVEL 100 ABOVE CORRUGATIONS 65mm CONCRETE COVER LEVEL VARIES 100 100 150 F2 NOM 150
1850 VARIES (TO BE DETERMINED ON SITE)
NOMINAL NOMINAL 150mm THICK CONCRETE GRADE C40/50 VARIES STAINLESS STEEL GRADE 316 ABOVE CORRUGATIONS
A393 REINFORCEMENT MESH VARIES WITH 65mm CONCRETE COVER CORRUGATED CULVERT TYPICAL CULVERT CROSS SECTION TOP OF LINING DETAIL CULVERT LINING DETAIL DETAIL AT ENTRY / EXIT OF CULVERT Scale at A1 1:10 Scale at A1 1:10 Scale at A1 1:20 Scale at A1 1:50 Scale at A3 1:20 Scale at A3 1:20 Scale at A3 1:40 Scale at A3 1:100 ISSUED FOR REVIEW
© ORDNANCE SURVEY IRELAND LICENSE NR. to 0236.dwg AR 0082518. ORDNANCE SURVEY IRELAND & TRANSPORT INFRASTRUCTURE DERRYREAG CULVERT (KY-N22-028.00) GOVERNMENT OF IRELAND IRELAND (TII) PROPOSED REMEDIAL WORKS ATKINS NOT TO BE HELD LIABLE FOR THE USE SHEET 2 0F 2 - 1:55pm OF THIS DATA ON ANY PROJECT OTHER THAN THE MUNSTER BRIDGES TERM MAINTENANCE CONTRACT NR.3 PROJECT AOS MG MJ 1:100 15, 2020 14/05/20 14/05/20 14/05/20 A NOTES ADDED, DETAILS UPDATED AOS 07/20 MJ MJ MUNSTER BRIDGES TERM Jul - ISSUED FOR REVIEW AOS 05/20 MJ MJ MAINTENANCE CONTRACT NR.3 Date: File: 5162555-HTR-DR-0235 P 5162555 / HTR / DR / 0236 A
V:\5162555\6 Dwgs-Graphics\61 AutoCad\5162555-HTR-DR-0235 to 0236.dwg
Appendix B. Contractor Method Statement
5162555DG0025 | 3 | 19/03/2021 Atkins | 5162555DG0025 rev 3 - Derryreag NIS.docx Page 47 of 54
RISK ASSESSMENT METHOD STATEMENT – RAMS 28 REV06
Title: Masonry Repair
Project Name: Munster Bridges
Locations: Derryreag Culvert - KY-N22-028.00
Safety Notes / Site Safety Rules:
a) All operatives will be Site Inducted on their first day on site and have a minimum of a valid Safe Pass card, as standard b) All works to be carried out within the agreed site boundary and/or Traffic Management plan c) All operatives will be required to wear the minimum P.P.E as follows: - - hard hats, hi-vis vests, safety boots (see below for task specific PPE) d) Working hours to be strictly within specified site hours. e) All plant operators to have relative and valid CSCS cards f) All persons on site to follow the instructions of site management g) GA1 certs to be kept on file for inspection in the Mobile Safety File h) All plant to be weekly inspected and details recorded on GA2 i) GA3 to be completed weekly or as conditions dictate for all work at height j) Harnesses to be recorded in the harness log book k) No works to be carried out in extreme weather conditions l) Where required (adverse weather) work to be protected with hessian material m) There are 10 generic traffic management plans. Any given plan may be used for the works items described in this method statement depending on bridge location. n) Traffic management to be set up as per temporary traffic mgmt. plan set No.1. o) The existing carriageway over the culvert shall remain in service at all times p) Cumnor shall liaise with the inland fisheries Ireland environmental officer regarding works
Ecological Notes
• No re-fuelling can take place within 20m of the stream and can only take place using bowsers of delivery trucks. • Spill trays to be used when refueling • All refueling to take place within the site set up on the hard shoulder and not anywhere near the watercourse • Spill kits will be readily available on site • When entering the stream, and when leaving the, all operatives must wash down their wellingtons / waders and any tools that come into contact with the water with active Virkon Aquatic. This will avoid the risk of any cross contamination when working on other bridges in other areas.
Page 1 of 21 CCF800/23 Rev 0 • Operatives to be made familiar with Inland Fisheries Ireland Biosecurity Protocol 2010 prior to commencing the works to ensure all guidelines are followed • Sandbags to be placed as bund to dry area below area of impact to prevent any lime mortar entering the watercourse • All birds’ nests are protected by law. Nests which might be encountered under bridges include dipper and grey wagtail. The Dipper nests in closed / domed nests often located on supports under bridges. Kingfisher may also nest in sand banks close to bridges. Our ecologist will advise on general ecological questions as works progress. If a nest is discovered, the area is to be left undisturbed and the ecologist advice should be sought. If a known nesting site would be impacted be proposed repair works, mitigation in the form of artificial nest boxes must be provided. • There is Japanese Knotweed growing in the vicinity of the culvert at the following locations: Downstream LHS - At this location the knotweed is within a 7m radius of the works area. A tarpaulin sheet will be placed over the plant and tied down with rope attached to stone weights. Care to taken that no parts of the plant are broken while carrying this out. This area is not to be disturbed and will be fenced off from the works area. This work will be carried under guidance from Cumnor’s Ecologist. Upstream LHS and RHS - At this location the knotweed is at the top of the river banks. These plants will be fenced off and isolated. • Access to the works area will for the most part be on the downstream RHS river bank. A handrail will be erected along this bank. There is no knotweed at this location.
Site Set Up
• TTMP set up No1 to be set up as per diagram below on the west bound carriage way
Page 2 of 21 CCF800/23 Rev 0
• Site vehicles will park within the temporary traffic management set up on the hard shoulder • All materials will be stored within the TM set up
Water Management
1) Life ring to be placed in full view on pole at edge of river 2) Sand to be brought to site in 1T Bags from Roadstone Classis. Sand to be clean building sand. 3) Approximately 60 no. hessian sand bags to be filled with sand and handed down to the river bed at upstream side of culvert 4) Sand bags should only be half filled with sand and tied & sealed to ensure no sand enters the watercourse 5) Bottom layer of sandbags should be “walked in” to riverbed to create good seal between sand bags and river bed 6) Sand bags to be built up in stretcher bond to desired height 7) There will be three dams erected in the stream; a. Dam 1 upstream of the culvert and dam 2 &3 situated downstream of the culvert (See above). b. Dam 2 and 3 will be erected first, 300mm high on the stream bed. c. Dam 1 will then be erected and the stream flow pumped downstream of dam 3. The intake will be fitted with a filter to ensure no fish enter the pipeline. d. The outfall pipeline will be fitted with a silt sock. This will dissipate flow and prevent scour of the river bed. e. The stream between dam 1 & 2 will be electro fished and the fish placed in the pool created between dam 2 and 3. f. On completion of the electro fishing dam 2 will be raised to full height and a silt fence will be erected between dam 2 and dam 3 and a second silt fence will be erected just upstream of dam 3. g. The water between dam 1 and dam 2 will be pumped into the pooled area between dam 2 and dam 3 in advance of the silt fences.
Page 3 of 21 CCF800/23 Rev 0 h. A shallow sump will be excavated (or naturally occurring) in the stream bed upstream of dam 2 to catch surface water and cleaning water from power washing the culvert. i. The collected water in the sump will be pumped downstream between dam 2 and dam 3 and discharge in advance of the silt fences 8) The outlet pipe will be placed into a 225mm non perforated pipe installed through the culvert at high level. It will be secured by a temporary bracket that will be fixed to at high level along the culvert. 9) The bracket will consist of a threaded bar arrangement with unit strut drilled through the steel lining with an expanding anchor bolt fitting at the end to hold it in place. The threaded rod arrangement will allow for height adjustment to accommodate for a gravity fall on the pipe. 10) Sump and 2 inch pump to be set up on down stream side of culvert to pump away any excess water that has managed to get through the sandbag dam. This water is to be pumped into the area between dam 1 and dam 2 11) Cumnor will arrange consultation with IFI prior to mobilisation. Electrofishing requirement will be agreed upon at this consultation.
Fig i – Downstream of Culvert
Page 4 of 21 CCF800/23 Rev 0
Fig ii – Upstream of culvert
Typical sequence of works:
1. In relation to existing bed gravels upstream and downstream of structure : Existing river bed gravels shall be retained. Lay Terram 2000GT on existing riverbed gravel and construct temporary 300mm thick clean Class 6F granular capping over to form working platform. On completion of the works remove the granular working platform and geotextile. Supplement the existing gravels to IFI requirements local to the culvert ends.’ 2. Existing stream bed material to be removed using shovels and wheel barrows. Kango hammer to be used where necessary 3. Concrete lining to be removed using a 1.5T Excavator and rock breaker. Kango hammers and jack hammers will also be used when necessary. 4. The excavator will be lowered into the culvert with a 100T crane that will be set up on the hard shoulder of the carriageway. 5. Material that is to be taken out of the culvert will be put into 1T bags and lifted to roadside using the crane 6. Material to be disposed of in Conhor Construction Tip in Ballincollig
Fig iii
7. Power Washing of Culvert Lining: • The lining will be cleaned using a 25.000PSI Hydro Power Washer removing the loose / decayed material and exposing a clean Sa3 finish on the existing steel lining. • The washing unit generator will be positioned in the works area on the road with the lance hose running down the bank into the mouth of the culvert.
Page 5 of 21 CCF800/23 Rev 0 • The washing will commence on upstream side, washing in the downstream direction. • It is predicted that the power washing will remove all loose / decayed material but if required small angle grinders and wire brushes will be used to remove any small pockets that remain. This area will then be power washed again to ensure it is completely clean. • A silt fence will be erected at the outfall of the culvert on the downstream side to ‘filter’ the resultant water from the washing of the steel lining. • Arisings from the cleaning of the culvert lining will be collected within the culvert and disposed of off site to a Conhor construction tip. • A small pump will then be placed on the down – stream side to pump the water into the area between Dam 2 and Dam 3. • A layer of silt fencing will be wrapped around the intake pipe of the pump as an additional filter layer and the outfall will have a de-watering bag placed around the end of hose.
Fig iii 9. The invert shall then be coated with a corrosion inhibitor such as Galvafroid manufactured by Fosroc or equivalent approved. 10. An anti-corrosion steel primer such as Nitoprime Zincrich Plus by Fosroc or equivalent to be used to prime the steel. 11. Shotcreting o Nominal 200mm Thick C25/30 Shotcrete Lining with A393 Stainless Steel Mesh Reinforcement to 1/3 diameter height o All shot-creting works shall be undertaken in accordance with "BS EN 14487 : sprayed concrete - execution" o Nominal 200mm Thick C25/30 Shotcrete Lining With A393 Stainless Steel Mesh Reinforcement to 1/3 diameter height o The culvert lining works shall be executed during the low water flow in the months July to September inclusive o Set up pump on road within works area o Pump hoses will always be located within dry works area so there is no chance of concrete spillage entering the watercourse o Care to be taken when working beside live road o Direct concrete lorry to pump o One man to act as pump operative
o 2 men required for nozzle and spraying o Spotter to stand at mouth of culvert and act as communicator between pump man and nozzle man o Googles or glasses to be worn at all times when shotcreting o Nominal 200mm to be sprayed on culvert face o Pump hoses etc to be completely cleaned ready for next days pour. 12. Works will take approximately 2 weeks. 13. Excess concrete to be put in skip. 14. Upon demobilisation all plant and materials to be taken away in Cumnor hiab truck
Page 6 of 21 CCF800/23 Rev 0 15. Material used for working platform to be put into 1 T bags and removed from works area with hiab crane. Terram to be disposed of in skip 16. Flume to be removed from river and Dam 1 & 2 dismantled 17. Silt fences and dam 3 to be left in place until the sediment upstream of same has disapated. 18. Small step in river bed outside culvert to be reinstated with washed gravel as required 19. All sandbags to be lifted from river and taken to Conhor construction tip in Ballincollig.
Fig iv – Reed B50 Shotcrete Pump
Key Personnel Involved:
Name: Role / Trade: Contracts Manager Project Engineer Quality & Safety Manager Contract Ecologist Foreman / SLG
P.P.E required
Other:
1. Hi-Vis vest / jacket - double banded EN ISO 20471
2. Trousers – double banded Safety Boots Hard Hats Safety EN ISO 20471:2013 To include EN397 Gloves 3. PVC rain trousers / jackets EN50365
Page 7 of 21 CCF800/23 Rev 0 Ankle EN 388 levels EN 471:2003 support 4-1-2-1 or 4. Safety harness (where no edge protection) EN ISO 2-1-2-1 EN 361:2002 20345:2011 CE 5. Lanyard S3 SRC EN 355:2002
Note: EN 795 for any anchor point used
All work is to be undertaken by qualified competent persons with experience of the type of work described above
Prepared by: Date: 02nd February 2020
Position: Contract Manager Issue no: Rev 00
Page 8 of 21 CCF800/23 Rev 0
Project / Location Munster Bridges Job No: J1938
Assessment Review Assessment Date: Assessed By: COM 12/05/20 Period: Scope of Works:
Evaluation Matrix Severity of Consequence (S) Likelihood (L) Risk Level (R)
1 Insignificant/minor first aid, no time off, no loss 1 Improbable Low 1 - 4 5 5 10 15 20 25 Severity of Lost time, recoverable, (strain, sprain, laceration, dermatitis) 2 2 Low Moderate 5 - 9 Consequence 4 4 8 12 16 20 3 3 6 9 12 15 Temporary disability, recoverable (minor fracture, asthma, 3 3 Medium Considerable 10 - 14 deafness, concussion) 2 2 4 6 8 10
Permanent disability, survivable (major fractures, amputation, 1 1 2 3 4 5 4 4 High head injuries, eye injuries, poisoning) High 15 – 19 1 2 3 4 5 5 Causing death to one or more people (fatal injuries, Likelihood occupational cancer, fatal disease/fire) 5 Almost certain Critical 20-25
Notes on completing the Risk Assessment below:
• A number of Hazards have been identified on the above mentioned site. Please confirm which may be applicable to your specific works on site. Each hazard is to be completed by entering Y/N in the end column and initial that you have read and understood. If specific relevant hazards have not been noted, the Sub-Contractor is obliged to ensure those hazards, including detailed risk assessment are included in the blank sections below. Additional space has been left if addition controls are required.
• If issues arise on site causing unforeseen and additional risks to those completing the works, that job or task will need to be PAUSED until such
time that the Risk has been assessed and additional control measures are put in place and documented below reducing the risk associated with said
works
Page 9 of 21 CCF800/23 Rev 0
Existing and Additional Risk Control Measures Risk Applic Ref: Individual Hazards Identified Persons / Groups at Risk Remaining able on Activity Risk Before After site Description Controls Controls Y / N S L R S L R (Initial) 1. • Use of Abrasive • Eye / bodily • All Operators 3 3 9 • Ensure guards and safety devices are working & in place 1 3 3 Wheels injuries • Members of the • Certified operatives only to change abrasive wheels / discs • Injury to other Public • Safety goggles / glasses (correct EN rating – min BS2092) and person suitable ear protection to be worn at all times • Nosie induced • Work area to be free of debris and obstructions & item to be cut is hearing loss securely positioned • Damage to • Check operations will not affect others in the immediate area either Materials / by flying debris or excessive noise services • Ensure protection of adjacent materials and services are in place (Water, Gas, ESB)
2. • Access, egress • Trip hazards, • All Operators 4 2 8 • All access ways into site to be kept clear at all times 4 2 2 to site and work slipping causing • Members of the • Site housekeeping to be enforced to ensure the site is safe and areas a limb injury Public organised • All cables to be hung or moved out of access paths
3. • Use of a • Incompetence • All Operators 4 2 8 • Use only authorised nominated and certified persons to sling loads 2 2 4 Banksman on • Trapped hands / • Members of the & bank plant Site feet public • Understanding of hand signals is required • Injury to • Incorrect use of • Hands and feet are clear of load before any signal is given persons in lifting gear • Only approved and certified lifting gear may be used public • Overloading • Banksman must wear an orange, named hi vis top spaces Little or no • Radio communication must be used where visibility is restricted • Damage to Communication • Strong gloves and steel toe capped boots are a must adjacent buildings / materials
Page 10 of 21 CCF800/23 Rev 0 4. • Using Cement • Severe skin • All operators 2 2 4 • A MSDS (Material Safety Data Sheet) sheet must be available for 1 2 2 and / or concrete burns involved in the materials used on site • Falls of operation • Appropriate PPE to be worn, including glasses for splashing, PVC materials into gloves and wellingtons excavations • Washing facilities and first aid station to be provided for operatives • Manual • Restrict time exposed to concrete handling • Barriers / stop blocks to all excavations • Suitable discharge area for concrete lorries • Safe system of work in place documented and signed by all involved in the works
5. • Any Demolition • Sudden collapse • All operators 2 4 8 • All glass, projecting parts & loose objects will be removed first 2 2 4 works on site of structure involved in the • All service to be made redundant / safe • Hazardous works • No other work will be carried out within the area of demolition substances • Public adjacent to • Demolition will start at the top of the roof and work downwards works areas • Continuous monitoring of the structure will be carried out to ensure stability of the structure • Dust suppression to be used, if conditions dictate • Shoring and bracing will be erected as required to prevent collapse • All openings to be protected • PPE to be worn at all times • Safe system of work in place documented and signed by all involved in the works
Page 11 of 21 CCF800/23 Rev 0 6. • Dust on Site • Visibility • Injury to 4 2 8 • Use equipment that produces minimal dust 2 1 2 • Silicosis impairment for operators on • Use water to dampen when cutting • Dust drivers causing site • Restricted hours on site explosion collision • Injury to members • Seal off areas to prevent the spread of dust • • Personal injury of the public • Issue PPE - dust masks, safety respirators
7. • Use of Electrics • Electrocution • All operators 2 4 8 • All temporary routes for cabling must be set out beforehand and 2 2 4 on Site • Damage to • Members of the duct where possible cables public that me be • All portable equipment must be P.A.T tested as per the Gen • Overload in close proximity Application Regs 2007, part 3: Electricity – Reg 81 (as required) causing a fire of the site and certs kept on file • All electrical appliances / tools must be visually checked by a competent person before each use • Trailing cables must be tied overhead where possible and not interfere with access routes • All electrical cabinets / boxes must be locked • C02 temporary fire points must be strategically setup around site / buildings • All electrical tools must be a maximum of 110volts • Safe system of work in place documented and signed by all involved in the works
8. Fires • Bodily injury • All operators 2 4 8 • No burning of materials anywhere on or around site permitted 2 2 4 • Spread of fire • Member of public • All gas bottles must be securely tied and have a Fire point • Property in close proximity (extinguisher) close at hand damage of the site • Any explosives are to be protected by close board sheeting • Potential death • Strategic fire points to be setup around site & through buildings • Temporary fire escape layout plan & evacuation plan to be setup
Page 12 of 21 CCF800/23 Rev 0 9. • Lifting • Dangers to • All operators 4 2 8 • All lifting equipment must be certified (GA1) and copies of certs 1 4 4 Equipment operatives on • Public in close kept onsite site proximity of • Only certified operators to use lifting plant, e.g. cranes, MEWP’s • Fall of materials site etc • Lifting equipment to be checked and recorded in GA2 weekly • Any damaged or worn slings / chains must not be used and disposed of • Temporary barriers must be placed around lifting / sluing areas • Safe system of work in place documented and signed by all involved in the works
10. • Manual • Injury to back • All operators 4 2 8 • All operatives are trained in manual handling. 4 1 4 Handling of • Lower limb • Use of mechanical aids to lift items where possible, e.g. cable block materials on site injury / teleporter/ Hi-ab • Arm & Hand • Use of two employees to lift awkward or heavy items injuries • Frequent stretching of the back is encouraged to all employees who are constantly bending.
Page 13 of 21 CCF800/23 Rev 0 11. • Noise • Damage to • All operators 4 2 8 • PPE must be worn when there is a noise level is above 80dBA 2 2 4 hearing • Members of • Earplugs to be worn at low level noises • Affecting the public in • Ear muffs to be worn when operators are using tool/plant that have members of the close a high noise level public proximity to • Operators are not to be exposed to excessively loud noises for the ongoing extended periods works • If possible use other plant and tools that do not have a loud noise level
12. • Operating Plant • Dangers to other • Operator 4 4 12 • Area to be excavated to be CAT scanned for services by ticketed 1 4 4 on Site operatives on • Operatives on operator. Drawing and plans to be checked also. Dial before you dig (Excavator) site site to be consulted. • Overturning of • Members of • Operators must be CSCS certified and trained to use plant excavator the public • Safety signage to be in place • Overhead • No unauthorised passengers permitted on plant. Services • All plant must have flashing beacons and audible sirens • Underground • Care to be taken when reversing and sluing Services • Unattended excavator must have the engine switched off and keys • Injury to driver out and others • Extra care to be taken where sloping surfaces are being driven including death • Do not overload machinery to their stated capacity • All other operatives to remain outside the exclusion zone. 13. • Operating Tools • Cuts / • All operators 4 2 8 • Wear appropriate PPE to include ear defenders and safety glasses / 2 1 2 • Operator must track on the designated access route as required on site Lacerations using tools on goggles • Spotter to be in place at all times • Long term site • Only 110volt (max) permitted on site • Safe system of work in place documented and signed by all deafness • Erect sound barriers as required involved in the works • Nerve injuries • Restrict length of time for use, e.g. mainly vibrating / oscillating
tools (check tool specs)
• Do not leave tools running
Page 14 of 21 CCF800/23 Rev 0 14. • Refuelling plant • Fire / • All operators 2 2 4 • All fuels to be kept in correct containers and clearly labelled & 1 2 2 on site environmental involved in the identified pollution refuelling task • No refuelling to take place in the vicinity of ignition points • Engines must be switched off before any refuelling takes place • Fuel tanks must be double skinned and bunded with lockable valves • Spillage kits must be in close proximity of all tanks and within waste lorries • Storage areas of fuels must have appropriate fire extinguishers • Any spillages must be reported immediately to the Site Supervisor / Safety Manager
15. • Setting out of • Injury to • All operators 2 4 8 • Install traffic management as per plan issued 1 3 3 Traffic operator on site • Members of • Ensure signage and cones are as per approved plan Management by moving the public • Operators with CSCS cards to setup traffic management system and vehicles inspect on a weekly basis or as required • Injury to • Safe system of work in place documented and signed by all members of the involved in the works public that may • be in close 16. • Preventing • proximInjury toity of • All operators 2 3 6 • All site visitors are inducted prior to being in work areas 2 2 4 unauthorised worksunauthorised on site • Operators to notify site management of any unauthorised access to access to area of person on site • Unauthorised site immediately works • Damage to plant person on site • Site gates to be closed at all times and locked and checked at close / equipment and of business materials All required signage in place notifying public of works in the area
Page 15 of 21 CCF800/23 Rev 0 17. • Vibration on • Numbness & • All operators 2 2 4 • Allow only competent persons to use tools 1 2 2 site tingling of involved in the • Refer to individual vibration / exposure limits fingers / hands works • Wear full PPE to include anti-vibration gloves as required • Nerve & muscle • Reduce length of times using tool damage to • Use tools with low vibration fingers / hands • Safe system of work in place documented and signed by all • White finger involved in the works (VWF) • Arm vibration • (AV)
18. • Working in bad • Operators being • All operators 3 3 9 • When there are poor weather conditions all work to stop 3 1 3 weather injured as a immediately, foreman to make call if carrying out work is unsafe conditions result of the bad weather
19. • Working over • Drowning • All operators 3 4 12 • PPE to include life vests, flotation devices and drag lines as 2 3 6 water • Upper body conditions dictate or where no edge protection in place injuries • AF4 to be completed weekly • Death of fish • Temporary decks with heavy gauge polythene and catch nets to be life used where working under bridges • All plant and tools to be placed in water course to be steam cleaned prior to use • Safe system of work in place documented and signed by all involved in the works
Page 16 of 21 CCF800/23 Rev 0 20. • Vermin and bird • Contact with • All operators 3 3 9 • Suitable PPE to be worn at all times. including full disposable 2 2 4 droppings droppings may involved in overalls. Gloves to be disposed of after each use – do not re-use cause illness and works gloves / dust masks / disposable suits. irritations to • Hands to be washed before eating food, or touching your face as operative bird droppings may contain ‘Salmonella’ (a bacterial infection causing severe diarrhea). • All breaks are to be taken away from the areas contaminated by bird droppings to avoid cross contamination. • Dampen down the bird droppings with water to prevent the creation of dust from the droppings. • Excessive bird droppings can cause a build-up of insects, which can transmit diseases and other infections, so the use of insect repellent is required if this is the case. • Operatives who have pre-existing respiratory conditions are to wear suitable dust masks such as the 3m 6000 series as required. • Operatives with weakened immune systems should not directly do tasks involving bird droppings. • all works involved with areas containing excessive bird droppings are to be supervised sufficiently ensuring controls are in place at all times. 21. • Virus / infection • Contraction • Operatives 3 5 15 • Cumnor Construction ltd has introduced a detailed 3 1 3
Control (Covi- of virus, • Other Covid-19 policy which will become part of everyday 19 / Influenza) illness contractors action to inhibit the spread of Covid-19 throughout our • Hospitalisatio • Members of the community or communities which we are involved with. n public • This policy has been created and approved under direct • Epidemic / • Family discussion with senior management and must be applied pandemic members throughout each site and each working day. effects • Prior to attending site, all operatives are required to • Serious complete a screening questionnaire’ & ‘CIF-C19 online illness to the induction’ and issue digitally to site management for elderly and review. Those failing the questionnaire will not be those with permitted on site. underlying • Each site will have a C19 Compliance Officer appointed conditions to ensure social distancing guidelines, rules and policies • Possible death are maintained at all times • Each site has been issued a revised Site Attendance Register which includes Covd-19 Screening Assessment questions to be carried out by the ‘Designated Person’ ‘C19 Compliance Officer. • Site start times are to be staggered to reduce the number of personnel entering and exiting the site at any one time Page 17 of 21 CCF800/23• Wash Rev 0hands using soap and warm water following the 20 second rule and drying sufficiently using disposable 22. • • • • Avoid eating outside of cleaned areas such as canteens. • Ensure that sites are not flooded with personnel, only the necessary amount of personnel are to be on site at any one time. Social distancing protocols as set out by the department of health are to be followed at all times. • Use hand sanitizing gel as required, but hand washing regularly is the best form of defence. 23. • Close Contact • Contraction • Operatives 3 5 15 • All site personnel are to be screened prior to enteringThe 3 2 6 working of virus, • Other ‘designatedsite on a daily person’ basis / ‘C19 Compliance Officer’ will illness contractors • ensureAll personnel that all pers are onnelto be briefwill edabide daily by on social their distancing work • Transmission • Members of the protocolspractices beingkeeping car atried a minimum out. 2m from other people at of Virus, public • allAny times. close contact working that is to be envisaged is to Illness • Family • be added into the daily briefing. Keep • Hospitalisatio members • workElimination areas clean of close, and contactwipe down working surfaces is to such be preferred as door n handat allles, times hand rails and any surface that is touched by • Epidemic / • operatives,Engineering with controls a disinfectant where appropriate cleaner regul arearly to be put in pandemic throughoutplace where the possible, day. and each action where close effects • Canteenscontact is and envisaged toilets to is beto cleanedhave a separate before and RA afterfor that • Serious breaks.task. All food waste to be placed in bins provided. illness to the •• BreakWhere times pos sible,are to if be close stagger contacted in working order to cannotminimize be the elderly and numberavoided, of personnel personnel are within to be the put canteen in pairs at with any thoseone time, pairs those with ensurremaininging all for personnel all close are co ntact2m apart activities when sitting or underlying • standing.Exclusion zones including signage are to be put in place conditions • aroundRead anythe H&Sclose Newsletterscontact working that areareas issued to ensure on a regularother • Possible death basisoperati whichves are wi llnot give able cur torent enter information the area, while on the ongoing virusmaintaining outbreak. social distancing for all others on site at all • times,Cough illuminat / sneezein ginto Complia a tissuence or by your other elbow site members.and dispose • ofExcl the usiontissue zones immediatel includingy and signage wash your are to hands be put in place immediatelyaround any closeafterwards. contact working areas to ensure other • operativesIf you feel are unwell not able and to have enter any the ofarea, the whilefollowing, notifymaintaining your site social super distancingvisor immed for iately:all others Cough, on site Elevated at all Temperatimes, illuminatingture, shortne Compliancess of breath, by runny other nose. site members. •• AdditionalPeople who PPE have such mild as Dustsymptoms masks, must safety stay glasses, at home anwhited self suits-isolate. and gloves are mandatory for close contact • workingEnsure and that must sites beare worn not flooded at all times. with personnel, only • theUpon necessary completion amount of ofthe personnel task the white are to suits, be on dust site mask at anys oneand ti gloveme. Socials are to distancing be disposed protocols of in a asse parateset out bin by cltheearly Page 18 of 21 CCF800/23 department labelled Rev 0 on ofsite health for conta are tminatedo be followed materials at all times.
• Operatives are to wash their hands prior to commencing 24. • • • • All tools used are to be cleaned and disinfected after use, and at any other times where tools may be shared between personnel on site. If possible, tools are not to be shared on site, but must be cleaned at the end of each day and prior to commencing work the following days • Site start times are to be staggered to reduce the number of personnel entering and exiting the site at any one time
25. • Using Alcohol • Burns to • Operatives 4 3 12 • Safety Data sheets for Hand Sanitisers to be retained on 4 1 4 Based Hand hands and using the site detailing the concentration of alcohol in the HS Sanitiser skin hand • Dedicated Hand Sanitising (HS) Stations are to be set
• sanitiser and up at each site and works area operatives • HS Stations are to be out of direct sunlight. adjacent to • HS Stations are not to be placed in corridors or areas where entrances that form fire escape routes hand sanitiser is • Detailed instructions on the application and use of HS to be displayed at each HS station applied • Small amount of HS to be placed in the palm of hand and rubbed in sufficiently without stopping until hands are dry and the vapours disperse
• Hand sanitisers to be rubbed in and dry before leaving the HS Station ‘once dry, your hands are safe’
• Alcohol-based HS should be stored and used away from all heat and ignition sources, including (but not limited to) sparks; open flames; any types of electrical outlets, switches or equipment; and extreme heat.
• Hand sanitisers not to be stored or used within site working areas where possible sources of ignition are applicable
• Fire Blanket / extinguisher to be in place at HS stations
• Any HS with an alcohol content over 50% is to be treated as above
• Suitable first aid measures are to be in place on sites for • burns applicable from the misuse of the HS.
Page 19 of 21 CCF800/23 Rev 0 Specific Training Required:
Safe Pass CSCS card for plant Manual Handling CSCS card for scaffolding CSCS card for MEWPs CSCS card for cranes
Prepared by: Date: May 2020
Position: Engineer Issue no: Rev 00
Page 20 of 21 CCF800/23 Rev 0
We (the undersigned) have read and understood the attached Site Specific Method Statement and will comply with the specified requirements and control measures. If the work activity changes or deviates from that originally envisaged, we will seek further advice and request an amended method statement.
METHOD STATEMENT BRIEFING
Consultation, comment, A.O.B.
Name (print): Signature: Date:
Page 21 of 21 CCF800/23 Rev 0
Appendix C. Hydraulic Assessment
5162555DG0025 | 3 | 19/03/2021 Atkins | 5162555DG0025 rev 3 - Derryreag NIS.docx Page 48 of 54
AF50 Rev1113 Construction, Replacement or Alteration of Bridges and Culverts Application for Consent under Section 50 of the Arterial Drainage Act, 1945 & EU (Assessment and Management of Flood Risks) Regulations SI 122 of 2010 Project Name Culvert Lining Hydraulic Impact Assessment - Structure Ref No. KY-N22-028 Derryreag culvert Applicant (Correspondence will issue to agent) Company or Organisation Name: Transport Infrastructure Ireland Postal Address: Parkgate Business Centre, Parkgate Street, Dublin 8, D08 DK10 Contact Person: Phone: Fax: E-mail:
Agent (Correspondence will issue to agent) Company or Organisation Name: Atkins (t/a WS Atkins Ireland Limited)
Location and Parameters of crossing Watercourse: Unnamed Stream Catchment: Unnamed Stream Address (Townland – County): Derryreag - County of Kerry Grid Reference X: 512283.00 Y: 581902.00 Hydrometric Station(s) utilized N/A (including reference number): Area of Contributing Catchment: 3.112 Km2 Road Reference: N22 Design Flood Flow: 18.53 m3/s Annual Exceedance Probability (AEP): 1 %
Statement of Authenticity I hereby certify that the information contained in this application form, along with all appended supporting information, has been checked by me and that all statements are true and accurate. Name: Company/Organisation: Atkins (t/a WS Atkins Ireland Limited) Signature: Date:
Application Check List COMPLETED APPLICATION FORM SUPPORTING HYDROLOGICAL AND HYDRAULIC INFORMATION PHOTOGRAPHS COVERING SITE OF ALL PROPOSED WORKS SCALED PLAN OF BRIDGE/CULVERT/APPROACH EARTHWORKS SCALED CROSS SECTION OF BRIDGE/CULVERT/APPROACH EARTHWORKS SCALED LONG SECTION OF CHANNEL THROUGH BRIDGE/CULVERT DETAILS OF RELEVANT EXISTING STRUCTURES COMPLETED STATEMENT OF AUTHENTICITY PLAN OF CATCHMENT AREA COPY OF NOTICE OF GRANT OF PLANNING PERMISSION WITH CONDITIONS *1
For OPW use only Date of Receipt OPW Drainage Maintenance Region East South East South West West
If the application form is not completed correctly, and in its entirety, the application may be deemed invalid and returned for correction. Correspondence Number OPW Register No: Consent Issued
ADDITIONAL INFORMATION
Hydrological Analysis
Methodology Applied Factors Applied
Method Used Tick box if used or Flow *2 Type of Factor Value Used state other (m3/sec) Climate Change 1.2 Flood Studies Update 4.47 (QMED) Irish Growth Curve 1.96 (FSR3, IH124) 2.05 (FSU) characteristics Factor for Standard Error 1.37 (FSU) 1.58 (FSR3) 1.65 (IH 124)
3 – Variable Catchment 5.98 (QBAR) Drained Channel Characteistics Other
IH 124 5.71 (QBAR) Gauged Flow Unit Hydrograph Tidal Other Comments Q100 estimates (with factors applied) from Other different methods: FSR FSU Other FSU = 12.55 m3/s FSR3 = 18.53 m3/s Comments: Flows calculated using FSR3 method was taken IH 124 = 18.47 m3/s forward for the hydraulic modelling as these flows were more (Flows presented here exclude the climate conservative than IH124 and FSU estimates. change allowances)
Hydraulic/Structure Details Description of Structure*3 The existing culvert is circular in shape and made up of corrugated steel metal. The upstream face of the culvert has a diameter 5.31 m, and the downstream face has diameter of 5.09 m. The culvert is 32 m long. There are baffles present in the culvert. Proposed works consist of cleaning out the silt from the existing culvert and lining the culvert with 150mm thick reinforced concrete at the bottom third. Effective Conveyance Area *4 Culvert Lining Hydraulic Impact Assessment - Derryreag culvert 5.705 m2 Upstream Invert Level 187.99 mOD Downstream Invert Level 185.538 mOD
Upstream Soffit Level Culvert Lining Hydraulic Downstream Soffit Level Culvert Lining Hydraulic Impact Assessment -Derryreag culvert mOD Impact Assessment -Derryreag culvert mOD Upstream Design Flood Level 190.509 mOD Downstream Design Flood Level 186.792 mOD
NOTES : 1. In line with OPW policy, section 50 approvals should be sought for bridges and culverts that are necessary for access or deemed acceptable by the planning authority. A copy of the notice of grant of planning permission with all conditions should be enclosed with all applications, that are not exempt development under the Planning and Development Act, 2000, as evidence that these factors have been considered.
If the application form is not completed correctly, and in its entirety, the application may be deemed invalid and returned for correction. 2. Flow is the estimated flow from the catchment, without any factors applied. 3. The following details are to be included: the channel bed level, invert and soffit levels of the structure along with the width, length and total conveyance area. Any environmental considerations such as bed depression, baffles, mammal walkways etc. should be described. 4. Effective conveyance area is from channel bed level to design flood level.
5. All levels must be given to Ordnance Datum, Malin Head.
If the application form is not completed correctly, and in its entirety, the application may be deemed invalid and returned for correction.
Culvert Lining Hydraulic Impact Assessment Derryreag Culvert: KY-N22-028 Transport Infrastructure Ireland
March 2020
Notice
This document and its contents have been prepared and are intended solely as information for Transport Infrastructure Ireland and use in relation to Derryreag Culvert: KY-N22-028 WS Atkins Ireland Limited assumes no responsibility to any other party in respect of or arising out of or in connection with this document and/or its contents. This document has 23 pages including the cover.
Document history Document title: Derryreag Culvert: KY-N22-028 Document reference: 5162160DG0005 Revision Purpose description Originated Checked Reviewed Authorised Date Rev 0.0 Issued for Review PA KC PC MJ March 2020
Client signoff Client Transport Infrastructure Ireland Project Culvert Lining Hydraulic Impact Assessment Job number 5162160 Client signature/date
Contains sensitive information 5162160DG0005 | 0.0 | March 2020 Atkins | Derryreag Culvert Capacity Assessment.docx Page 2 of 23
Contents
Chapter Page 1. Introduction 5 2. Site Location 5 3. Existing Culvert Description 6 4. Proposed Works 7 5. Catchment Description 8 5.1. Flow Assessment 9 6. Development of Hydraulic Model 12 6.1. Hydraulic Model Selection 12 6.2. Hydraulic Modelling Assumptions 12 6.3. Topographical Survey Data 12 6.4. Channel & Associated Bank Roughness Values 12 6.5. Boundary Conditions 13 6.6. Hydraulic Model Development 13 7. Analysis of Model Simulations 16 7.1. Impact of Proposed Works 16 7.2. Impact of Climate Change 17 7.3. Impact on the Low Flows 17 8. Conclusions 17
Appendices 21 Appendix A. Survey Data & Proposed Construction Drawings 22
Tables Table 5-1 Physical catchment descriptors 8 Table 5-2 Design flows for Derryreag culvert 9 Table 5-3 FSR3 parameters 10 Table 5-4 Design flow estimates – FSR3 method 10 Table 5-5 Design flow estimates – IoH 124 method 10 Table 5-6 Q100 estimates from different methods 11 Table 5-7 - Design flow estimates for hydraulic modelling - derived by FSR3 method 11 Table 6-1 Roughness values 13 Table 6-2 Cross section locations 13 Table 6-3 - Culvert geometry details 15 Table 8-1 - Hydraulic model results (maximum stage) 18 Table 8-2 - Hydraulic model results (maximum depth) 19 Table 8-3 - Hydraulic model results for QMED (max. velocity) 20
Contains sensitive information 5162160DG0005 | 0.0 | March 2020 Atkins | Derryreag Culvert Capacity Assessment.docx Page 3 of 23
Figures Figure 2-1 – Derryreag culvert location 5 Figure 3-1 Derryreag culvert entrance 6 Figure 3-2 Inside view of Derryreag culvert 6 Figure 4-1 Typical culvert section – proposed 7 Figure 5-1 Derryreag culvert catchment 8 Figure 5-2 Growth factors from FSU portal 9 Figure 6-1 Location of cross sections 14 Figure 7-1 - Long section plot - Q100 16
Contains sensitive information 5162160DG0005 | 0.0 | March 2020 Atkins | Derryreag Culvert Capacity Assessment.docx Page 4 of 23
1. Introduction
Atkins were commissioned by Transport Infrastructure Ireland (TII) in respect of National Roads bridges maintenance for Munster and North West regions of Ireland. As a part of this, 45 corrugated steel culverts inverts are proposed to be lined with concrete. This assessment is undertaken for Derryreag Culvert (Structure ID: KY-N22-028) to analyse the impact of proposed lining on the culverts’ flow capacity and their impacts on the flood levels upstream and downstream of the culverts.
2. Site Location
The Derryreag culvert is located at the N22 National Road, south of River Clydagh in the County Kerry. The location of the culvert is shown in Figure 2-1.
Derryreag Culvert
Figure 2-1 – Derryreag culvert location
Contains sensitive information 5162160DG0005 | 0.0 | March 2020 Atkins | Derryreag Culvert Capacity Assessment.docx Page 5 of 23
3. Existing Culvert Description
Derryreag culvert consists of corrugated steel metal and is circular in shape. The upstream face of the culvert has a diameter of 5.31 m, and the downstream face has diameter of 5.09 m. The inlet and outlet are ‘mitred to slope’ type. The culvert is 32 m long. The cross section upstream and downstream of culvert show the river width approximately equal to the culvert width. The culvert soffit at the entrance is about 2 m higher than the banks. The banks are covered with vegetated grasslands and forests. The current condition of the culvert at the entrance is shown in Figure 3-1. Figure 3-2 shows that on the inside, the culvert contains baffles to aid in aquatic life passage.
Figure 3-1 Derryreag culvert entrance
Figure 3-2 Inside view of Derryreag culvert
Contains sensitive information 5162160DG0005 | 0.0 | March 2020 Atkins | Derryreag Culvert Capacity Assessment.docx Page 6 of 23
4. Proposed Works
The proposed works consist of cleaning out the silt, removing the concrete bed and baffles from the existing culvert. Further, the works include lining the culverts with 150mm thick reinforced concrete up to the bottom one-third depth within the culverts as detailed in Figure 4-1 and reforming the concrete bed and baffles for fish passage. The figure represents only typical details. For hydraulic modelling, the diameter is assumed to be reduced overall within the culvert, as discussed further under Section 6.6.
Figure 4-1 Typical culvert section – proposed
Contains sensitive information 5162160DG0005 | 0.0 | March 2020 Atkins | Derryreag Culvert Capacity Assessment.docx Page 7 of 23
5. Catchment Description
Derryreag culvert is located on an unnamed tributary, approximately 250 m upstream of its confluence with River Clydagh. The catchment area is 3.112 km2 and is mostly rural with small settlements upstream of Derryreag culvert. The Derryreag culvert drainage catchment and culvert location are shown in Figure 5-1. From the FSU portal, the closest node to the culvert was identified as the ‘FSU outlet node’ and it lies 140 m downstream of the culvert location (Figure 5-1). The catchment draining to the FSU outlet node is ungauged and is noted as the subject site catchment (Location Number: 22_383-3). The catchment characteristics as taken from the FSU Portal are tabulated in Table 5-1. As the additional catchment area between the culvert and the FSU outlet node is small, the subject site area was considered for further analysis. The main stream has a very steep slope (S1085=48.2584 m/km). The catchment is highly impermeable (BFISOIL=0.3988), and there is no attenuation due to lakes/reservoirs (FARL=1). The catchment characteristics indicates that the catchment has a very quick response to the rainfall events. The area is not marked with repetitive flooding, however there is a single flood event (2005) reported near the confluence of unnamed tributary with River Clydagh (www.floodinfo.ie). The aerial imagery shows that there are several properties in the vicinity of the culvert on the upstream, however none of them are identified to be at risk from the available data (floodinfo.ie portal).
Approximate FSU outlet node property location
Culvert location
Catchment area
Figure 5-1 Derryreag culvert catchment
Table 5-1 Physical catchment descriptors Parameter Value Location Number 22_3837_3 Contributing catchment Area 3.112 km2 BFISOIL 0.3988 SAAR 2320.37 mm FARL 1 DRAIND 1.15 km/km2 S1085 48.2584 m/km ARTDRAIN2 0 URBEXT 0
Contains sensitive information 5162160DG0005 | 0.0 | March 2020 Atkins | Derryreag Culvert Capacity Assessment.docx Page 8 of 23
5.1. Flow Assessment This section details the estimation of design flows (QMED and Q100) using different standard approaches. The comparison of different estimates provides a greater confidence in the estimated flows. To calculate the 1-in- 100-year event with 20% climate change allowance (Q100C1), a multiplication factor of 1.2 has been applied to the different Q100 estimates. Three methods for flow estimation namely, Flood Studies Update (FSU), FSR3 and IH124 were used. Since the catchment area is small (<25 km2), the FSU method is not applicable. However, to obtain the catchment parameters and for comparative purposes, the FSU method was also considered.
5.1.1. Flood Studies Update (FSU) Programme Method The FSU Programme provides an improved methodology to estimate design rainfall and flood estimates at both gauged and ungauged catchments in the Republic of Ireland. The PCD (Physical Catchment Descriptor) rural estimate of QMED from the FSU Portal for the ungauged outlet at the culvert location is 4.47 m3/s. As the catchment is completely rural, only the rural estimates were taken for computation.
5.1.1.1. FSU QMED Estimation The subject site is ungauged, hence pivot catchments were reviewed for hydrological similarity. However, all three pivot catchments were very big (>100 km2), and the closest hydrological similarity value computed was 3.9458 (recommended value is 1), hence all pivot catchments were rejected. Thus, the PCD QMED estimate was applied with the standard factorial error of 1.37 (for 68% confidence interval-upper limit) to ensure that the flows are not underestimated, and the final QMED values was calculated to be 6.12 m3/s (4.47 x 1.37).
FSU100yr Design Flow Estimation Pooled flood frequency analysis was performed for the subject site in the FSU Portal, and the growth factor for various flood frequencies was estimated as shown in the Figure 5-2.
Figure 5-2 Growth factors from FSU portal
The growth factor for 100-year design flood was used for the assessment. The upper limit of the standard error associated with growth factor in pooling analysis for EV1 distribution is 2%, and hence the error adjusted growth factor is 2.0502. Finally, the 100-year flood (Q100) is calculated as 12.55 m3/s. A 20% uplift for climate change was done to obtain 100-year flood with 20% climate change (Q100C1) as 15.06 m3/s. Table 5-2 summarizes the design flows for Derryreag culvert from the FSU analysis.
Table 5-2 Design flows for Derryreag culvert Event Flow (m3/s) QMED 6.12 Q100 12.55 Q100C1 15.06
Contains sensitive information 5162160DG0005 | 0.0 | March 2020 Atkins | Derryreag Culvert Capacity Assessment.docx Page 9 of 23
5.1.2. The FSR3 method The Flood Studies Supplementary Report 6, 3-variable method (henceforth referred to as FSR3) was used to determine the mean annual flow (QBAR), hence Q100 and Q100C1 for Derryreag catchment. The FSR3 equation to determine mean annual flow (QBAR) is shown below: 0.92 1.22 2.0 푄퐵퐴푅푟푢푟푎푙 = 0.00066 퐴푟푒푎 푆퐴퐴푅 푆푂퐼퐿 A desktop study was carried out to determine the values of the parameters for the Derryreag culvert catchment. The description of parameters of the 3-variable equation, and the determined values for the catchment are listed in Table 5-3.
Table 5-3 FSR3 parameters Parameter Description Values Area Catchment area (km2) 3.112 SAAR Standard Average Annual Rainfall (mm) 2320.3 SOIL Soil index (no units) 0.5
The SOIL factor has been computed by area-weightage of different SOIL categories within the catchment using the maps from UKSUDS website. The values listed above were applied to the calculations, and the QBAR was calculated to be 5.985 m3/s. Further, the standard factorial error of 1.58 (for 68% confidence interval) and the QBAR estimate was calculated to be 9.456 m3/s.
For FSR3 method, the growth factor for 1 in 100-year flood is 1.96 (Flood Studies Report). Thus, Q100 and Q100C1 are estimated and listed in Table 5-4.
Table 5-4 Design flow estimates – FSR3 method Event Flow (m3/s) QBAR 9.456 Q100 18.53 Q100C1 22.24
5.1.3. Institute of Hydrology Report No.124 method The Institute of Hydrology (IoH) Report 124 method was used to determine the mean annual flow (QBAR), hence Q100 for Derryreag culvert catchment. The Institute of Hydrology Report No.124(IH 124) 3 parameter equation to determine mean annual flow (QBAR) is shown below: 0.89 1.17 2.17 푄퐵퐴푅푟푢푟푎푙 = 0.00108 퐴푟푒푎 푆퐴퐴푅 푆푂퐼퐿 A desktop study was carried out to determine the values of the parameters for the Derryreag culvert catchment. The description of parameters of the IoH 3-variable equation and the determined values for the catchment are listed in Table 5-3. The values are applied to the calculations, and the QBAR was calculated to be 5.711 m3/s. Further the standard factorial error of 1.65 (for 68% confidence interval) was applied.
For IoH 124 method, the growth factor for 1 in 100-year flood is 1.96 (Flood Studies Report). Thus, flow estimates are listed in Table 5-5.
Table 5-5 Design flow estimates – IoH 124 method Event Flow (m3/s) QBAR 9.42 Q100 18.47 Q100C1 22.16
Contains sensitive information 5162160DG0005 | 0.0 | March 2020 Atkins | Derryreag Culvert Capacity Assessment.docx Page 10 of 23
5.1.4. Design flows for hydraulic modelling The flows determined using the three methods discussed in Sections 5.1.1, 5.1.2, and 5.1.3 were reviewed. Table 5-6 shows comparison of Q100 estimates from different methods. The FSU analysis was carried out just for comparative purposes as it is applicable on catchment areas greater than 25 km2. The comparison of Q100 estimates (Table 5-6) from the other two different methods are comparable, thereby indicating the robustness and reliability of estimates for the study area. The FSR3 and IH124 methods are better suited for catchment sizes greater than 0.4 km2.
Table 5-6 Q100 estimates from different methods Method Q100 FSU 12.55 FSR3 18.53 IH 124 18.47
The flows computed using FSR3 methodology was taken forward for hydraulic modelling as this flows is more conservative.
The QMED event corresponds to the median flood flow (1 in 2-year return period) and is a reasonable estimate for low flows as there is 50% exceedance probability. The QMED flow for FSR3 method is estimated as:
Thus, QMED is computed as (9.456/1.07) = 8.84 m3/s. The summary of flows taken forward for hydraulic modelling is listed in Table 5-7.
Table 5-7 - Design flow estimates for hydraulic modelling - derived by FSR3 method Event Flow (m3/s)
QMED 8.84
Q100 18.53 Q100C1 22.24
Contains sensitive information 5162160DG0005 | 0.0 | March 2020 Atkins | Derryreag Culvert Capacity Assessment.docx Page 11 of 23
6. Development of Hydraulic Model
A 1D hydraulic model was developed for the tributary with the Derryreag culvert added. The purpose was to estimate the impact of the proposed lining on the culvert capacity, predicted water levels upstream and downstream, and changes in the velocities during the low flow events. Due to the uncertainty and limitations in hydrologic and hydraulic modelling along with assumptions as listed in Section 6.2, the reader is advised to exercise caution and interpret the results as indicative changes in river channels levels due to the proposed works. The results should not be used for any direct assessment of flood risk in the region. 6.1. Hydraulic Model Selection Flood Modeller v4.5 was selected to construct the 1D hydraulic model for the study area. 6.2. Hydraulic Modelling Assumptions The following are the main assumptions in the hydraulic model development: 1. The culvert is modelled as circular conduit 2. The culvert invert levels from the survey data correspond to elevation of the concrete bed present within the culverts. As no information about the depth of concrete bed is available, the elevation of concrete bed is assumed to represent culvert invert levels. From the photographs, the thickness of the concrete is minimal at the entrance and exit. 3. Baffles (weirs) present within the culvert for fish passage is considered to offer resistance to the flow of water. Length-weighted average Manning’s roughness has been applied to account for the baffles. 4. The average Manning’s roughness has been calculated for the depth of flow in Q100C1 event, and has been applied to the bottom half of the culvert in Flood Modeller. 5. Depth of baffles is not explicitly modelled. However, their impact is considered using Manning’s roughness as stated above. 6. An entrance loss co-efficient of 0.7 has been assumed corresponding to mitred to slope inlet 7. In the proposed scenario, the baffles are assumed to be constructed on top of the proposed liner for fish passage. They are assumed to offer similar resistance to the flow of water as in the baseline scenario. 8. The effective conveyance area for the proposed scenario has been estimated by deducting the area of liner from the existing cross section area of the culvert. The diameter corresponding to the effective conveyance area has been used in the model. 9. In the proposed scenario, the liner and concreted bed/weirs are constructed such that there is no change in the invert levels. 6.3. Topographical Survey Data Topographical survey data from iO Geomatics survey, 2019 has been used to develop the hydraulic model. The data includes river cross sections and culvert and deck details. The survey covers the watercourse for a length of 182m upstream of the culvert, and 212m downstream of the culvert. The extent of the survey and the survey data received are shown in Appendix A of the report. 6.4. Channel & Associated Bank Roughness Values Manning’s roughness values were assigned based on survey data provided by iO Geomatics, 2019. The channel and overbanks are assigned roughness values of 0.04 and 0.06 respectively, which is appropriate for the site conditions. No silt deposition is present in the culvert. There is a low flow channel identified within the culvert. There are also weirs present on top of the concrete bed within the culvert, however no details about their dimensions are available from the survey data. The weirs are considered to offer resistance to the flow of water, hence a higher Manning’s roughness (n = 0.040) has been applied for an approximated length of 3 m corresponding to the
Contains sensitive information 5162160DG0005 | 0.0 | March 2020 Atkins | Derryreag Culvert Capacity Assessment.docx Page 12 of 23
concrete weirs. The Manning’s roughness ‘n’ of 0.028 corresponding to corrugated metal has been used for top of the culvert based on the photographs. In the proposed scenario, the culvert is assumed to be lined at its bottom third with reinforced concrete, and weirs are assumed to be installed on top of the liner such that invert levels of the culvert remain unaltered. The weirs are assumed to offer similar resistance to the flow of water in the proposed scenario. Table 6-1 below lists the assigned Manning’s roughness values in the hydraulic models.
Table 6-1 Roughness values Watercourse Features Manning’s Roughness River bed 0.040 River banks 0.060 Culvert top (baseline) 0.028 Culvert bottom (baseline) 0.036 (weighted avg. of the below) • Concrete bed and weirs 0.040 • Corrugated portion 0.028 Culvert top (proposed) 0.028 Culvert bottom (proposed) 0.030 (weighted avg. of the below) • Concrete bed and weirs 0.040 • Liner 0.012
6.5. Boundary Conditions A constant flow was applied as the upstream boundary of the model. The culvert is located 200m upstream of the River Clydagh. Downstream extent of the model is the confluence with river Clydagh, however no water levels information is available from CFRAMS or OPW portal (floodinfo.ie). The area is not with recurring flood events. Hence, normal depth boundary was applied at the downstream of the model. This is also a conservative approach as it predicts a higher headloss at the culvert. 6.6. Hydraulic Model Development A total channel length of 425m along the unnamed tributary to River Clydagh was modelled. This includes river cross sections, Derryreag culvert and the boundaries. The location of cross sections used for hydraulic model development is shown in Figure 6-1. The cross sections and their relative positions to the culvert is tabulated in Table 6-2 below.
Table 6-2 Cross section locations River Station Relative distance to Derryreag culvert DER_014 182 m from upstream face of culvert DER_013 149 m from upstream face of culvert DER_012 95 m from upstream face of culvert DER_011 80 m from upstream face of culvert DER_010 62 m from upstream face of culvert DER_009 42 m from upstream face of culvert DER_008 22 m from upstream face of culvert DER_007 10 m from upstream face of culvert DER_007d upstream face of culvert - cross section DER_Cu upstream face of culvert - culvert unit DER_CuRe1 Culvert interpolate 1 DER_CuRe2 Culvert interpolate 2
Contains sensitive information 5162160DG0005 | 0.0 | March 2020 Atkins | Derryreag Culvert Capacity Assessment.docx Page 13 of 23
DER_CuRe3 Culvert interpolate 3 DER_Cd downstream face of culvert - culvert unit DER_006u downstream face of culvert - cross section DER_006 8 m from downstream face of culvert DER_006In1 17 m from downstream face of culvert DER_006In2 27 m from downstream face of culvert DER_005 37 m from downstream face of culvert DER_004 50 m from downstream face of culvert DER_003 108 m from downstream face of culvert DER_002 164 m from downstream face of culvert DER_001 212 m from downstream face of culvert
Figure 6-1 Location of cross sections
Contains sensitive information 5162160DG0005 | 0.0 | March 2020 Atkins | Derryreag Culvert Capacity Assessment.docx Page 14 of 23
The survey data was used to develop a ‘baseline’ model representing the existing situation. The ‘baseline’ hydraulic model was further used to create a ‘proposed’ scenario model, where lining is provided in the culvert. Below are the changes in the ‘proposed’ scenario model. • Manning’s roughness was updated to 0.030 for bottom half of the culvert (as detailed in Table 6-1). • The diameter of the culvert, which gives an equivalent cross section area post lining was calculated and updated in the proposed model. Culvert details before and after the lining are shown in Table 6-3 below.
Table 6-3 - Culvert geometry details Baseline scenario After lining Invert level (mOD) Diameter (m) Invert level (mOD) Diameter (m) Culvert Entrance 187.990 5.310 187.990 5.246 Culvert Exit 185.538 5.087 185.538 5.020
Contains sensitive information 5162160DG0005 | 0.0 | March 2020 Atkins | Derryreag Culvert Capacity Assessment.docx Page 15 of 23
7. Analysis of Model Simulations
The baseline and proposed models were simulated under steady state model for the following scenarios: • Impact of proposed works (Q100) • Impact of climate change (Q100C1) • Low flow condition (QMED) 7.1. Impact of Proposed Works The baseline and proposed hydraulic models were simulated for 1 in 100-year event to predict the impacts of proposed works. The maximum stage and depth results from hydraulic modelling for Q100 are presented in Table 8-1 and Table 8-2. A long section plot indicating the maximum stages along the watercourse for 1 in 100-year event is also shown in Figure7-1.
Long Section: DER_014 - DER_001 - Maximum Stage; 2 - 5 h.
204 202 200 198 196 194 192 190 188 186
184 Elevation (mAD) Elevation 182 180 178 176 174 172
170
DER_Cd DER_Cd
DER_014 DER_014 DER_013 DER_012 DER_011 DER_010 DER_009 DER_008 DER_007 DER_005 DER_004 DER_003 DER_002 DER_001
DER_007d DER_007d Node Label
DER_CuRe2 DER_CuRe2 DER_006In1 DER_006In2
gfedcb Maximum Stage; Baseline Scenario (DER_1D_Q100C1_T004_001.zzl) gfedcb Maximum Stage; Proposed Scenario (DER_1D_Q100C1_T005_001.zzl) gfedcb Bed Elevation: DER_014 - DER_001: DER_014 - DER_001 gfedcb Left Bank: DER_014 - DER_001: DER_014 - DER_001 gfedcb Right Bank: DER_014 - DER_001: DER_014 - DER_001
Figure 7-1 - Long section plot - Q100
The results demonstrate that the impact due to lining is predicted only in the reach upstream of the culvert. For the 1 in 100-year event, the maximum increase in the water level is 261 mm. This is within OPW allowable limits.
Contains sensitive information 5162160DG0005 | 0.0 | March 2020 Atkins | Derryreag Culvert Capacity Assessment.docx Page 16 of 23
There is enough freeboard available (minimum 2.791 m at the inlet) in the proposed scenario, and the proposed works do not affect the water levels in the reach beyond 30 m upstream of the culvert. The N22 road is also not overtopped due to the lining works. There are no properties identified to be at risk as described in Section 5. Hence, the proposed works to the Derryreag culvert will not have a significant hydraulic impact on its watercourse. 7.2. Impact of Climate Change The baseline and proposed hydraulic models were simulated for 1 in 100-year plus 20% climate change event. The purpose of these simulations was to assess whether the proposed lining works to the Derryreag culvert will have any hydraulic impacts under a climate change scenario. The maximum stage and depth results from hydraulic modelling for Q100C1 are presented in Table 8-1 and Table 8-2 respectively. The results of the simulation indicate that in the existing scenario, the water level at culvert entry is 190.483 mOD and increases by 293 mm, to 190.777 mOD due to the lining works. This increase is within allowable OPW limits. The change in water levels are predicted only up to 30 m upstream of the culvert. The change in water levels predicted in the downstream reach of the culvert are negligible (maximum increase is 11 mm). There is enough freeboard available (2.523 m) in the proposed scenario. Also, the flows remain within the channel and therefore no increase in flood risk is predicted. Hence, the results indicate that no extra allowances are needed during proposed works to account for a climate change event. 7.3. Impact on the Low Flows To assess the availability of water for fish passage during low flows, the hydraulic model was assessed for the QMED event. The flow depth and velocity results are presented in Table 8-2 Table 8-3 respectively. The modelling results in Table 8-2 suggest that for the baseline scenario, the depth of flow is 1.513 m at the upstream and 1.001 m at the downstream end of the culvert. The corresponding flow velocities are in the range of 1.442 m/s to 3.001 m/s for the upstream and downstream ends respectively (Table 8-3). From Table 8-2, it can be noted that the proposed works causes the flow depth at the upstream end of the culvert to increase by 166 mm, to 1.679 m. The corresponding decrease in velocity is from 1.442 m/s to 1.271 m/s. At the downstream, change in flow depths are negligible. There is an increase in velocity from 3.001 m/s to 3.044 m/s. The impact of these changes on fish passage and any necessary mitigation works will be discussed and agreed with Fisheries Ireland before commencement of the works. 8. Conclusions
Based on the hydrology estimations, and further hydraulic model assessment for the baseline and proposed scenarios, following conclusions are made: • This hydraulic capacity assessment has been prepared in consideration of the requirements under Section 50 of the Arterial Drainage Act 1945. • FSR3 methodology has been used to derive flows for QMED, Q100 and Q100C1 and their magnitudes are 8.84m3/s, 18.53 m3/s and 22.24 m3/s respectively. • The proposed works, due to the reduced flow area, results in increase in water levels at upstream of the Derryreag culvert. No changes in the maximum water levels are predicted at the downstream. • For the three events analysed, the predicted increase in the maximum stage is in the range of 166 mm to 293 mm. The change due to the proposed works is within the OPW limit of 300 mm. • A minimum freeboard of 2.523 m is available in the culvert under all conditions, and this meets the OPW minimum threshold criteria • During low flows, minimum depth in the culvert will increase from 1.513 m to 1.679 m and flow velocity reduce from 1.442 m/s to 1.271 m/s. The impact of these changes on fish passage and any necessary mitigation works will be discussed and agreed with Fisheries Ireland before commencement of the works. • The nearby properties and N22 road are not expected to be affected due to the proposed works
Contains sensitive information 5162160DG0005 | 0.0 | March 2020 Atkins | Derryreag Culvert Capacity Assessment.docx Page 17 of 23
Table 8-1 - Hydraulic model results (maximum stage) Node label Maximum stage for different return periods (in mOD) (upstream to downstream) QMED event 1 in 100-year event 1 in 100-year plus 20% climate change event Baseline Proposed Difference Baseline Proposed Difference Baseline Proposed Difference DER_014 203.913 203.910 -0.003 204.332 204.332 0.001 204.449 204.459 0.009 DER_013 201.636 201.638 0.002 201.908 201.909 0.001 201.990 201.996 0.006 DER_012 196.361 196.361 0.000 196.644 196.644 0.001 196.738 196.740 0.002 DER_011 195.671 195.661 -0.011 195.851 195.834 -0.018 195.912 195.891 -0.021 DER_010 194.375 194.378 0.003 194.598 194.606 0.009 194.671 194.688 0.017 DER_009 192.716 192.695 -0.021 192.906 192.877 -0.029 192.953 192.922 -0.031 DER_008 190.713 190.722 0.009 191.036 191.063 0.027 191.140 191.207 0.067 DER_007 189.617 189.710 0.093 190.222 190.356 0.133 190.420 190.646 0.226 DER_007d 189.503 189.669 0.166 190.248 190.509 0.261 190.483 190.777 0.293 DER_Cu 188.741 188.680 -0.061 189.068 188.980 -0.089 189.171 189.073 -0.098 DER_CuRe1 188.134 188.073 -0.060 188.457 188.367 -0.090 188.562 188.463 -0.099 DER_CuRe2 187.513 187.452 -0.062 187.878 187.797 -0.080 188.001 187.916 -0.084 DER_CuRe3 187.016 186.980 -0.036 187.460 187.421 -0.039 187.606 187.566 -0.039 DER_Cd 186.798 186.802 0.004 187.265 187.270 0.005 187.416 187.421 0.006 DER_006u 186.539 186.541 0.002 186.791 186.792 0.001 186.872 186.873 0.001 DER_006 185.237 185.239 0.002 185.481 185.482 0.001 185.553 185.553 0.000 DER_006In1 183.034 183.036 0.002 183.264 183.265 0.001 183.327 183.329 0.002 DER_006In2 180.588 180.590 0.002 180.782 180.783 0.001 180.839 180.845 0.007 DER_005 178.545 178.546 0.001 178.809 178.809 0.001 178.883 178.894 0.011 DER_004 177.833 177.834 0.001 178.112 178.113 0.001 178.195 178.204 0.009 DER_003 173.593 173.594 0.001 173.843 173.844 0.001 173.917 173.918 0.001 DER_002 170.907 170.907 0.001 171.149 171.149 0.000 171.210 171.210 0.000 DER_001 170.274 170.275 0.001 170.527 170.527 0.000 170.597 170.597 0.000
Contains sensitive information 5162160DG0005 | 0.0 | March 2020 Atkins | Derryreag Culvert Capacity Assessment.docx Page 18 of 23
Table 8-2 - Hydraulic model results (maximum depth) Maximum depth for different return periods (m) Node label (upstream to QMED event 1 in 100-year event 1 in 100-year plus 20% climate change event downstream) Baseline Proposed Difference Baseline Proposed Difference Baseline Proposed Difference DER_014 1.410 1.407 -0.002 1.829 1.829 0.001 1.946 1.956 0.009 DER_013 0.639 0.641 0.002 0.911 0.912 0.001 0.993 0.999 0.006 DER_012 0.593 0.593 0.000 0.876 0.876 0.000 0.970 0.972 0.002 DER_011 0.990 0.980 -0.011 1.170 1.152 -0.018 1.231 1.210 -0.021 DER_010 0.511 0.514 0.003 0.734 0.742 0.009 0.807 0.824 0.017 DER_009 0.715 0.694 -0.021 0.905 0.876 -0.029 0.952 0.921 -0.031 DER_008 0.892 0.901 0.009 1.215 1.242 0.027 1.319 1.386 0.067 DER_007 0.967 1.060 0.093 1.572 1.705 0.133 1.770 1.996 0.226 DER_007d 1.513 1.679 0.166 2.258 2.519 0.261 2.493 2.786 0.293 DER_Cu 0.751 0.690 -0.061 1.078 0.990 -0.089 1.181 1.083 -0.098 DER_CuRe1 0.753 0.693 -0.060 1.077 0.987 -0.090 1.182 1.083 -0.099 DER_CuRe2 0.743 0.682 -0.062 1.108 1.027 -0.080 1.230 1.146 -0.084 DER_CuRe3 0.855 0.819 -0.036 1.300 1.260 -0.039 1.445 1.406 -0.039 DER_Cd 1.260 1.264 0.004 1.727 1.732 0.005 1.878 1.883 0.006 DER_006u 1.001 1.003 0.002 1.253 1.254 0.001 1.334 1.335 0.001 DER_006 0.532 0.534 0.002 0.777 0.778 0.001 0.849 0.849 0.000 DER_006In1 0.614 0.615 0.002 0.843 0.844 0.001 0.906 0.908 0.002 DER_006In2 0.451 0.453 0.002 0.645 0.646 0.001 0.701 0.708 0.007 DER_005 0.691 0.692 0.001 0.954 0.955 0.001 1.029 1.040 0.011 DER_004 0.846 0.847 0.001 1.125 1.125 0.001 1.208 1.217 0.009 DER_003 0.602 0.604 0.001 0.853 0.854 0.001 0.927 0.928 0.001 DER_002 0.509 0.509 0.001 0.751 0.751 0.000 0.812 0.812 0.000 DER_001 0.643 0.644 0.001 0.896 0.896 0.000 0.966 0.966 0.000
Contains sensitive information 5162160DG0005 | 0.0 | March 2020 Atkins | Derryreag Culvert Capacity Assessment.docx Page 19 of 23
Table 8-3 - Hydraulic model results for QMED (max. velocity)
Node label Maximum velocity in m/s (upstream to downstream) Baseline Proposed Difference DER_014 2.283 2.321 0.038 DER_013 5.273 5.409 0.136 DER_012 4.142 4.242 0.100 DER_011 2.565 2.646 0.081 DER_010 4.761 4.850 0.089 DER_009 3.350 3.556 0.206 DER_008 6.077 6.170 0.093 DER_007 2.652 2.359 -0.293 DER_007d 1.442 1.271 -0.171 DER_Cu 4.623 5.266 0.643 DER_CuRe1 4.599 5.226 0.627 DER_CuRe2 4.692 5.357 0.665 DER_CuRe3 3.826 4.099 0.273 DER_Cd 2.254 2.261 0.008 DER_006u 3.001 3.044 0.042 DER_006 7.355 7.634 0.279 DER_006In1 4.858 4.975 0.117 DER_006In2 6.666 6.882 0.217 DER_005 2.856 2.897 0.041 DER_004 3.087 3.134 0.047 DER_003 4.341 4.440 0.098 DER_002 1.499 1.511 0.011 DER_001 1.988 2.007 0.020
Contains sensitive information 5162160DG0005 | 0.0 | March 2020 Atkins | Derryreag Culvert Capacity Assessment.docx Page 20 of 23
Appendices
Contains sensitive information 5162160DG0005 | 0.0 | March 2020 Atkins | Derryreag Culvert Capacity Assessment.docx Page 21 of 23
Appendix A. Survey Data & Proposed Construction Drawings
Contains sensitive information 5162160DG0005 | 0.0 | March 2020 Atkins | Derryreag Culvert Capacity Assessment.docx Page 22 of 23
Section 1-03 GENERAL NOTES 100 1. ALL DIMENSIONS ARE IN MILLIMETRES UNLESS NOTED OTHERWISE
2. ONLY WRITTEN DIMENSIONS SHALL BE USED. NO UNNAMED STREAM DIMENSIONS SHALL BE SCALED FROM THE DRAWINGS
3. ALL LEVELS ARE IN METRES AND ARE TO MALIN HEAD DATUM
4. ALL COORDINATES ARE IN METRES AND ARE TO IRISH TRANSVERSE MERCATOR
5. DRAWINGS ARE TO BE READ IN CONJUNCTION WITH THE SPECIFICATION
DRAWING NOTES
1. FOR RIVER CROSS SECTIONS 1-01 TO 1-14, REFER TO TOPOGRAPHICAL SURVEY DRAWINGS 10 0
Flow Section 1-04 A1
G189.82 189.78 189.83
189.98189.97
190.05
190.09 "
190.20
190.30 190.31
190.34 190.37 190.37 190.44 " 190.48 190.44
190.53 G 190.46 190.53 190.49 190.58 190.61 " 190.62 190.63
190.75 190.76 190.77 " 190.76190.76 190.79
190.87 190.90 190.90 1-05 190.94
" 191.02 191.04 191.07 191.03 " 191.06 191.09 G 191.14 191.11 191.17 191.17 191.19 Section
191.31 191.32 191.35 191.35
191.36 " 191.44 191.41 191.45 191.47 191.52 " S1 191.50 512195.455 581930.648 191.421 191.62 N22 To 191.61 191.62 191.75
191.72 " G 191.69 191.71 191.74 191.76 191.74 " " 184.59
191.72 Section 1-06 191.84 191.89
" 191.87 191.90 191.93 192.01 185.99 185.24
191.81 191.93 " 192.04 "
185.38 191.99 DERRYREAG CULVERT 185.35
191.91 192.07 185.051 Castleisland 185.21 185.58 192.18 Water Level
187.97 Date of survey=17 October 2019 192.13 192.11 192.19 192.27 186.88 192.28 187.49 192.36 (KY-N22-028.00) 186.89 "
192.29 188.09
192.40 192.48 192.50 192.43 192.39
192.59 192.57 192.63
192.48 192.67 190.61 192.62 192.58 " Pipe Soffit 192.50 192.84 192.50 192.70 192.76 192.53 191.58 " " DO NOT SCALE 192.44" 192.58 " 192.14 192.84 193.02
192.89 192.94 191.68 192.42 192.73 192.99 192.99 193.36 " 192.83 " 192.96 192.88 193.02 193.24 G 193.23 192.99 193.10 193.32 193.48 193.75 193.04 193.09 193.16 193.26 193.21 192.89 " 193.11193.11 193.24 193.31 193.42 193.77
193.08 193.45 193.21 193.55 193.67 193.33 "
193.23 193.37 193.49 193.14 193.32 193.39 193.48 194.01 193.25
193.83 193.37193.36 193.65 193.96 193.58 193.50 193.19 193.44 193.71 194.04 " 193.37 193.64
193.50 193.71 193.86 193.53 G 193.63 193.71 "
193.77 193.91 194.20 Bottom of FenceTop of Fence 193.53 193.88 194.00 193.52 193.81 193.65 194.00 194.01 194.07 194.11 " 194.14 Top of crash barrier 193.95 G 193.85 193.58 193.76 194.07 194.32 " 194.15 193.89 194.15
194.09
193.93 194.33 Base of crash barrier 194.04 194.29 194.37
194.07 194.42 " 193.95 194.50
194.26 193.92193.93 194.56 "" 194.62 194.71 193.87 194.20 194.49 " 194.70G 194.41 193.95 194.67 194.47 194.84 194.33 194.84 194.85 "
194.33 194.99 194.19 C2 194.77 194.45 194.13 " 194.99 " 194.18 194.38 512275.539 194.68 N22 To 581893.417 195.20 194.46 " 194.429 195.13 194.59 " 194.45 194.49 194.40 194.52 194.76 195.36 195.04 195.27 195.30 194.90 " Abbeyfeale 194.57 194.74 194.65 G 195.37 194.66 194.98 195.41 194.48 194.53 194.74 194.85 195.06 195.61 195.31 195.55 194.44 194.93 "
194.23 195.68 195.66 194.69 194.77 195.01 194.59 194.79 " C1 195.69 194.70 512287.935 195.27 194.80 581889.213 195.30 195.91 195.97 195.15 194.81 194.866 " 194.73 194.74 195.65 195.94 194.85 195.05 195.43 Base of crash barrier G 194.88 195.25 196.07 193.56 Top of crash barrier 195.02 195.95 196.07 194.97 " " 196.17 194.98 195.87 195.39 195.62 Bottom of Fence 195.09 Top of Fence 195.29 196.34 195.77 196.45 196.46 195.20 195.51 195.76 196.09 " 196.64
188.09 196.61 " 196.76 187.99 (invert level) 194.37 195.92 Water Level 195.68 G 196.70 196.32 " 193.30Date of survey=16 October 2019 196.01 196.62 196.79 Pipe Soffit 196.04 196.96
194.36 195.50 195.82 " 188.65 " 196.14 197.04 196.18 196.55 197.03 195.72 195.93 197.18 197.23 196.31 188.20 197.33 196.07 G 196.41 197.35 194.04 193.43 193.22 196.87 197.28 196.13 Pipe Invert T1 196.47 diam=0.30 m 512314.479195.84 196.20 " 581881.238 195.92 196.27 196.58 188.33 " 196.65 197.13 195.811 196.34 196.40 196.74 Section 1-07 196.22 197.38 196.48
196.21 196.55 196.97 197.54 188.46 " 196.98 196.62 196.68 192.36 197.13 196.46 196.71 197.22
Pipe Soffit 194.07 196.76 diam=0.30 m 196.81 197.33 197.38 188.79 196.89 Water Level 196.95 Date of survey=16 October 2019 197.57 188.65 196.73 197.02 197.54 196.81 " 197.68 197.75 197.16 197.77 197.21 197.29 197.35 197.07 197.50 197.56 197.62 193.95 197.70 194.36 197.19 193.29 197.35 197.76 " 197.20 " 197.88 197.97 198.00 197.67
197.66 CO-ORDINATES " 197.87 197.94 " 198.13
198.15 N = 581,900.244 Section 1-08 " E = 512,278.556
N22 NATIONAL PRIMARY ROAD
1-09 Section
Section 1-10
Section 1-11
Section UNNAMED STREAM 1-12
Flow
ISSUED FOR REVIEW
© ORDNANCE SURVEY IRELAND LICENSE NR. to 0233.dwg AR 0082518. ORDNANCE SURVEY IRELAND & TRANSPORT INFRASTRUCTURE DERRYREAG CULVERT (KY-N22-028.00) GOVERNMENT OF IRELAND IRELAND (TII) REMEDIAL WORKS ATKINS NOT TO BE HELD LIABLE FOR THE USE EXISTING SITE LAYOUT PLAN OF THIS DATA ON ANY PROJECT OTHER THAN THE MUNSTER BRIDGES TERM MAINTENANCE CONTRACT NR.3 PROJECT AOS MG MJ 1:500 18/11/19 18/11/19 18/11/19 A REVIEW COMMENTS INCORPORATED AOS 05/20 MJ MJ MUNSTER BRIDGES TERM May 20, 2020 - 12:36pm - ISSUED FOR REVIEW AOS 11/19 MG MJ MAINTENANCE CONTRACT NR.3 Date: File: 5162555-HTR-DR-0230 P 5162555 / HTR / DR / 0230 A
V:\5162555\6 Dwgs-Graphics\61 AutoCad\5162555-HTR-DR-0230 to 0233.dwg 184.24 187.09 188.53 190.01 190.17 GENERAL NOTES 100 190.48 190.73 1. ALL DIMENSIONS ARE IN MILLIMETRES UNLESS 191.10 NOTED OTHERWISE 191.60 2. ONLY WRITTEN DIMENSIONS SHALL BE USED. NO 191.36 184.59 191.52 UNNAMED STREAM DIMENSIONS SHALL BE SCALED FROM THE 191.43 191.29 DRAWINGS
191.17 Flow 191.01
192.01 187.97 185.99 185.24 3. ALL LEVELS ARE IN METRES AND ARE TO MALIN 187.96 HEAD DATUM "
185.38
185.35 187.30 190.22 4. ALL COORDINATES ARE IN METRES AND ARE TO EXISTING FENCING 185.051 188.74 185.21 185.58 IRISH TRANSVERSE MERCATOR 192.18 Water Level Date of survey=17 October 2019 C 191.28 187.97 191.15 0233 191.34 5. DRAWINGS ARE TO BE READ IN CONJUNCTION WITH 192.27 186.88 191.52 191.61 192.28 187.49 THE SPECIFICATION 192.36 191.81
186.89 192.23 " 192.58 EXISTING CONCRETE VERGE 188.09 192.40 192.40 192.48 192.50 10 192.59 192.57 192.63 0 192.67 190.61 192.62 " Pipe Soffit 192.64 192.70 192.71 192.76 192.84
191.58
192.14 192.84 193.02
192.89 192.94 191.68 192.99 192.99 193.36 192.83 A1 192.90 " 192.96 193.20 192.88 192.92 193.02 G 193.24 193.23 192.89 192.99 193.10 193.27 193.32 193.48 193.75 193.04 193.09 193.16 193.26 193.21 193.50 193.59 193.11193.11 193.11 193.24 193.31 193.42 193.77
193.08 193.45 193.21 193.22 193.55 193.05 193.67 193.55 193.13 193.33 " 193.64 193.23 193.37 193.49 193.68 193.14 193.32 193.39 193.68 193.48 194.01 193.25
193.83 193.37193.36 193.65 193.75 193.49 193.80 193.96 A 193.58 193.50 193.19 193.30 193.44 193.71 194.04 " 193.37 193.46 193.64 193.40 0232 193.50 193.71 193.86 193.53 G 193.63 193.71 "
193.77 193.91 193.45 Bottom of FenceTop of Fence EXISTING ROAD SAFETY BARRIER 193.53 194.20 193.88 194.00 193.52 193.70 193.81 193.88 193.65 194.00 194.01 194.07 194.11
DO NOT SCALE " 194.14 193.73 Top of crash barrier 193.95 G 193.85 193.58 193.76 194.07 194.32 " 194.15 193.89 194.15
194.09
193.91 194.03 194.17 193.93 194.33 193.89 194.29 Base of crash barrier 194.04 194.37 193.81 194.07 194.42 " 193.95 194.34 194.50
194.26 193.92193.93 194.56 "" 194.62 194.36 194.71 193.87 194.20 194.49 194.14 " 194.26 194.70G 194.41 193.95 194.67 194.47 194.84 194.33 194.69 194.84 194.85 " 194.59 194.33 194.99 194.19 C2 194.77 194.13 194.45 " 512275.539 194.87 194.99 " 194.18 194.38 194.68 581893.417 194.58 195.20 194.46 194.40 " 194.429 195.13 194.59 " 194.45 194.49 194.40 194.76 194.52 194.88 195.04 195.27 DERRYREAG CULVERT 194.90 194.57 194.74 194.53 194.65 (KY-N22-028.00) 194.83 194.66 194.98 194.48 194.53 194.74 194.85 195.10 194.78 195.06 194.63 195.31 194.44 194.93
194.23
194.69 194.77 195.01 194.59 194.79 " C1 194.78 194.70 194.81 512287.935 195.27 194.80 196.08 195.30 581889.213 195.01 195.44 195.15 194.81 194.866 194.73194.74 194.85 195.05 195.43 Base of crash barrier 194.58 194.88 195.25 193.56 Top of crash barrier 195.02 195.37 194.97 " EXISTING CONCRETE VERGE 194.30 194.96 194.64 194.98 195.23 193.94 195.39 195.62 Bottom of Fence 195.09 194.04 Top of Fence 195.29 193.84 195.61 195.20 195.51 193.47 193.23 188.09 187.99 (invert level) 194.37 193.24 Water Level 195.68 193.30Date of survey=16 October 2019 195.59 Pipe Soffit
194.36 195.50 195.82 188.65 " 195.78 192.39 195.72 195.93
188.20 193.04
194.04 193.43 193.22 191.88 Pipe Invert T1 diam=0.30 m EXISTING ROAD SAFETY BARRIER 512314.479195.84 " 581881.238 195.92 188.33 " B 195.811 193.78 0232
193.87 188.46
193.98 192.36 Pipe Soffit 193.92 194.07 D diam=0.30 m 193.55 188.79 193.52 Water Level 0233 Date of survey=16 October 2019 188.65 193.27 194.73 194.90 195.14 UNNAMED STREAM 193.95 195.35 194.36
193.29
Flow
ISSUED FOR REVIEW
© ORDNANCE SURVEY IRELAND LICENSE NR. to 0233.dwg AR 0082518. ORDNANCE SURVEY IRELAND & TRANSPORT INFRASTRUCTURE DERRYREAG CULVERT (KY-N22-028.00) GOVERNMENT OF IRELAND IRELAND (TII) REMEDIAL WORKS ATKINS NOT TO BE HELD LIABLE FOR THE USE EXISTING STRUCTURE LAYOUT PLAN OF THIS DATA ON ANY PROJECT OTHER THAN THE MUNSTER BRIDGES TERM MAINTENANCE CONTRACT NR.3 PROJECT AOS MG MJ 1:125 18/11/19 18/11/19 18/11/19 A REVIEW COMMENTS INCORPORATED AOS 05/20 MJ MJ MUNSTER BRIDGES TERM May 20, 2020 - 12:38pm - ISSUED FOR REVIEW AOS 11/19 MG MJ MAINTENANCE CONTRACT NR.3 Date: File: 5162555-HTR-DR-0230 P 5162555 / HTR / DR / 0231 A
V:\5162555\6 Dwgs-Graphics\61 AutoCad\5162555-HTR-DR-0230 to 0233.dwg GENERAL NOTES 100 1. ALL DIMENSIONS ARE IN MILLIMETRES UNLESS NOTED OTHERWISE
2. ONLY WRITTEN DIMENSIONS SHALL BE USED. NO DIMENSIONS SHALL BE SCALED FROM THE DRAWINGS
3. ALL LEVELS ARE IN METRES AND ARE TO MALIN CARRIAGEWAY CENTRELINE HEAD DATUM
4. ALL COORDINATES ARE IN METRES AND ARE TO IRISH TRANSVERSE MERCATOR
5. DRAWINGS ARE TO BE READ IN CONJUNCTION WITH THE SPECIFICATION 191.982m
SURVEYED WATER LEVEL 186.948m 10 0 A1 186.823m
DO NOT SCALE SECTION A SCALE 1:100 0231
Carriageway CL
ROAD SAFETY BARRIER 14692 2874 3923 3504 3275 852 H/S WESTBOUND EASTBOUND EASTBOUND H/S ROAD SAFETY BARRIER EXISTING FENCE
EXISTING FENCE
193.302m
190.625m
188.243m
185.198m
39953
SECTION B SCALE 1:100 0231
ISSUED FOR REVIEW
© ORDNANCE SURVEY IRELAND LICENSE NR. to 0233.dwg AR 0082518. ORDNANCE SURVEY IRELAND & TRANSPORT INFRASTRUCTURE DERRYREAG CULVERT (KY-N22-028.00) GOVERNMENT OF IRELAND IRELAND (TII) REMEDIAL WORKS ATKINS NOT TO BE HELD LIABLE FOR THE USE EXISTING SECTIONS A AND B OF THIS DATA ON ANY PROJECT OTHER THAN THE MUNSTER BRIDGES TERM MAINTENANCE CONTRACT NR.3 PROJECT AOS MG MJ 1:100 18/11/19 18/11/19 18/11/19 A REVIEW COMMENTS INCORPORATED AOS 05/20 MJ MJ MUNSTER BRIDGES TERM May 20, 2020 - 12:39pm - ISSUED FOR REVIEW AOS 11/19 MG MJ MAINTENANCE CONTRACT NR.3 Date: File: 5162555-HTR-DR-0230 P 5162555 / HTR / DR / 0232 A
V:\5162555\6 Dwgs-Graphics\61 AutoCad\5162555-HTR-DR-0230 to 0233.dwg GENERAL NOTES 100 1. ALL DIMENSIONS ARE IN MILLIMETRES UNLESS NOTED OTHERWISE EDGE OF CARRIAGEWAY 2. ONLY WRITTEN DIMENSIONS SHALL BE USED. NO DIMENSIONS SHALL BE SCALED FROM THE EDGE OF CARRIAGEWAY DRAWINGS
3. ALL LEVELS ARE IN METRES AND ARE TO MALIN HEAD DATUM
4. ALL COORDINATES ARE IN METRES AND ARE TO IRISH TRANSVERSE MERCATOR SURVEYED WATER LEVEL 185.002m 5. DRAWINGS ARE TO BE READ IN CONJUNCTION WITH THE SPECIFICATION 190.576m 10 0 A1
DATUM = 182.000mOD
Offset (m) 22.130 29.492 -31.025 -28.127 -23.658 -18.220 -12.923 -8.353 -2.635 0.000 3.524 8.773 14.993
Level (mOD) 191.355 191.516 191.271 190.994 187.952 187.936 186.442 184.813 186.430 188.733 191.212 191.520 191.864 DO NOT SCALE SECTION C SCALE 1:100 0231
EDGE OF CARRIAGEWAY
EDGE OF CARRIAGEWAY SURVEYED WATER LEVEL 188.390m
193.352m
DATUM = 185.000mOD
Offset (m) -33.315 -28.334 -21.333 -16.436 -12.132 -6.842 -4.785 -3.668 0.000 3.325 6.469 22.840 26.043 13.448 18.272
Level (mOD) 193.792 193.880 193.991 193.934 193.566 193.501 192.535 192.178 188.665 192.331 194.232 194.741 194.919 195.512 195.360
SECTION D SCALE 1:100 0231
ISSUED FOR REVIEW
© ORDNANCE SURVEY IRELAND LICENSE NR. to 0233.dwg AR 0082518. ORDNANCE SURVEY IRELAND & TRANSPORT INFRASTRUCTURE DERRYREAG CULVERT (KY-N22-028.00) GOVERNMENT OF IRELAND IRELAND (TII) REMEDIAL WORKS ATKINS NOT TO BE HELD LIABLE FOR THE USE EXISTING SECTIONAL ELEVATIONS C AND D OF THIS DATA ON ANY PROJECT OTHER THAN THE MUNSTER BRIDGES TERM MAINTENANCE CONTRACT NR.3 PROJECT AOS MG MJ 1:100 18/11/19 18/11/19 18/11/19 A REVIEW COMMENTS INCORPORATED AOS 05/20 MJ MJ MUNSTER BRIDGES TERM May 20, 2020 - 12:41pm - ISSUED FOR REVIEW AOS 11/19 MG MJ MAINTENANCE CONTRACT NR.3 Date: File: 5162555-HTR-DR-0230 P 5162555 / HTR / DR / 0233 A
V:\5162555\6 Dwgs-Graphics\61 AutoCad\5162555-HTR-DR-0230 to 0233.dwg GENERAL NOTES 100
1500 1. ALL DIMENSIONS ARE IN MILLIMETRES UNLESS NOTED OTHERWISE
2. ONLY WRITTEN DIMENSIONS SHALL BE USED. NO REMOVE AND DISPOSE OF EXISTING BED MATERIAL DIMENSIONS SHALL BE SCALED FROM THE DRAWINGS Flow (AVERAGE DEPTH 600mm). PLACE 300mm THICK CLASS 6F CAPPING MATERIAL ON 3. ALL LEVELS ARE IN METRES AND ARE TO MALIN 10000 TERRAM 2000 GT OR EQUIVALENT APPROVED AS A HEAD DATUM WORKING PLATFORM. 4. ALL COORDINATES ARE IN METRES AND ARE TO IRISH TRANSVERSE MERCATOR UNNAMED STREAM 185.24 ON COMPLETION OF THE WORKS PLACE 300mm THICK CLEAN NATURAL GRAVEL TO IFI REQUIREMENTS ON 5. DRAWINGS ARE TO BE READ IN CONJUNCTION WITH
185.35 EXISTING FENCING TOP OF THE WORKING PLATFORM. THE SPECIFICATION
192.18
192.27 192.28 10 EXISTING CONCRETE VERGE 192.40 0 192.48 192.50
192.59 192.57 192.63
192.62 192.70
A1 192.76
192.84 192.89 192.94
192.83
192.88 193.02 G 192.99 193.10
193.04 193.09 193.16 193.48 193.21 193.11193.11 193.24 193.42
193.08 193.21 193.45 193.67 193.33
193.23 A 193.37 193.49 193.14 0236 193.32 193.39 193.48 193.25
193.83 193.37193.36 193.65 193.58 193.50 193.44 193.71 193.37 193.64
193.50 193.71 193.53 G 193.63 193.71 193.77 DO NOT SCALE Bottom of FenceTop of Fence EXISTING ROAD SAFETY BARRIER 193.53 193.88
193.52 193.81 193.65 194.00 194.01
Top of crash barrier 193.95 G 193.76 193.85 194.07 194.15 193.89 194.15
194.09
193.93 194.33 Base of crash barrier 194.04 194.29
194.07 194.42 193.95 194.50
194.26 194.56 194.62 194.20 194.49 194.70G 194.41 194.67 194.47 194.33 194.84 194.85
194.33 194.77 194.45 194.99 194.38 194.68
195.13 194.59 194.45 194.49 194.52 194.76 195.04 195.27 DERRYREAG CULVERT 194.90 (KY-N22-028.00) 194.65 194.57 194.74 194.66 194.98 194.48 194.53 194.74 194.85 195.06 195.31 194.44 194.93
194.69 195.01 194.79
195.27 194.80 195.30
195.15 194.81 194.73 195.05 195.43 Base of crash barrier 194.88 Top of crash barrier 195.25
EXISTING CONCRETE VERGE 194.98 195.39 195.62 Bottom of Fence Top of Fence 195.29 195.51
195.68
195.82
195.72 195.93 B 0236 EXISTING ROAD SAFETY BARRIER REMOVE AND DISPOSE OF EXISTING BED MATERIAL (AVERAGE DEPTH 600mm). PLACE 300mm THICK CLASS 6F CAPPING MATERIAL ON TERRAM 2000 GT OR EQUIVALENT APPROVED AS A WORKING PLATFORM. ON COMPLETION OF THE WORKS PLACE 300mm THICK
CLEAN NATURAL GRAVEL TO IFI REQUIREMENTS ON TOP 10000 OF THE WORKING PLATFORM.
Flow
UNNAMED STREAM 193.95
1500 ISSUED FOR REVIEW
© ORDNANCE SURVEY IRELAND LICENSE NR. to 0236.dwg AR 0082518. ORDNANCE SURVEY IRELAND & TRANSPORT INFRASTRUCTURE DERRYREAG CULVERT (KY-N22-028.00) GOVERNMENT OF IRELAND IRELAND (TII) PROPOSED REMEDIAL WORKS ATKINS NOT TO BE HELD LIABLE FOR THE USE SHEET 1 OF 2 OF THIS DATA ON ANY PROJECT OTHER THAN THE MUNSTER BRIDGES TERM MAINTENANCE CONTRACT NR.3 PROJECT AOS MG MJ 1:125 14/05/20 14/05/20 14/05/20 MUNSTER BRIDGES TERM May 20, 2020 - 4:57pm - ISSUED FOR REVIEW AOS 05/20 MJ MJ MAINTENANCE CONTRACT NR.3 Date: File: 5162555-HTR-DR-0235 P 5162555 / HTR / DR / 0235 -
V:\5162555\6 Dwgs-Graphics\61 AutoCad\5162555-HTR-DR-0235 to 0236.dwg GENERAL NOTES 100 REMOVE AND DISPOSE EXISTING MATERIAL WITHIN CULVERTS. 1. ALL DIMENSIONS ARE IN MILLIMETRES UNLESS UNDER THE EXTENT OF PROPOSED LINING, CLEAN CULVERT NOTED OTHERWISE TO ST3 BY MECHANICAL MEANS AND COAT INSIDE OF CULVERT LINING WITH NITOPRIME ZINCRICH 2. ONLY WRITTEN DIMENSIONS SHALL BE USED. NO PLUS OR EQUIVALENT APPROVED DIMENSIONS SHALL BE SCALED FROM THE DRAWINGS CARRIAGEWAY CENTRELINE 3. ALL LEVELS ARE IN METRES AND ARE TO MALIN HEAD DATUM
4. ALL COORDINATES ARE IN METRES AND ARE TO IRISH TRANSVERSE MERCATOR 191.982m 5. DRAWINGS ARE TO BE READ IN CONJUNCTION WITH THE SPECIFICATION 10 0 1850
186.823m A1
SECTION A SCALE 1:100 0235
Carriageway CL PROPOSED CONCRETE LINING ROAD SAFETY BARRIER 14692 2874 3923 3504 3275 852 H/S WESTBOUND EASTBOUND EASTBOUND H/S ROAD SAFETY BARRIER REMOVE AND DISPOSE EXISTING MATERIAL WITHIN CULVERTS. EXISTING FENCE REMOVE AND DISPOSE OF EXISTING BED UNDER THE EXTENT OF PROPOSED LINING, CLEAN CULVERT MATERIAL (AVERAGE DEPTH 600mm). TO ST3 BY MECHANICAL MEANS AND PLACE 300mm THICK CLASS 6F COAT INSIDE OF CULVERT LINING WITH NITOPRIME ZINCRICH DO NOT SCALE CAPPING MATERIAL ON TERRAM 2000 GT EXISTING FENCE PLUS OR EQUIVALENT APPROVED OR EQUIVALENT APPROVED AS A WORKING PLATFORM. ON COMPLETION OF THE WORKS PLACE 300mm 193.302m THICK CLEAN NATURAL GRAVEL TO IFI REQUIREMENTS ON TOP OF THE WORKING PLATFORM. REMOVE AND DISPOSE OF EXISTING BED MATERIAL (AVERAGE DEPTH 600mm). 190.625m PLACE 300mm THICK CLASS 6F CAPPING MATERIAL ON TERRAM 2000 GT GRADE NEW GRAVEL OR EQUIVALENT APPROVED AS A MATERIAL INTO EXISTING BED 37215 WORKING PLATFORM. 188.243m ON COMPLETION OF THE WORKS PLACE 300mm THICK CLEAN NATURAL GRAVEL TO IFI REQUIREMENTS ON TOP OF THE WORKING PLATFORM.
185.198m
GRADE NEW GRAVEL MATERIAL INTO 1500 10000 39953 EXISTING BED
SECTION B Culvert CL EXISTING CORRUGATED CULVERT SCALE 1:100 0235
10000 1500 CULVERT CORRUGATIONS
INSIDE FACE OF CULVERT 300 CLEAN GRAVEL TO IFI REQUIREMENTS ON 300 CLASS CULVERT CONCRETE LINING CORRUGATION DEPTH (VARIES) 6F CAPPING ON TERRAM 2000 GT CONCRETE GRADE C40/50 STAINLESS STEEL A393 50 VARIES VARIES 50 STAINLESS STEEL A393 MESH NOMINAL THICKNESS 150mm REINFORCEMENT MESH WITH 100 ABOVE CORRUGATIONS 65mm CONCRETE COVER LEVEL VARIES 100 100 150 F2 NOM 150 1850
NOMINAL NOMINAL 150mm THICK CONCRETE GRADE C40/50 VARIES STAINLESS STEEL GRADE 316 ABOVE CORRUGATIONS
A393 REINFORCEMENT MESH VARIES WITH 65mm CONCRETE COVER CORRUGATED CULVERT TYPICAL CULVERT CROSS SECTION TOP OF LINING DETAIL CULVERT LINING DETAIL DETAIL AT ENTRY / EXIT OF CULVERT Scale at A1 1:10 Scale at A1 1:10 Scale at A1 1:20 Scale at A1 1:50 Scale at A3 1:20 Scale at A3 1:20 Scale at A3 1:40 Scale at A3 1:100 ISSUED FOR REVIEW
© ORDNANCE SURVEY IRELAND LICENSE NR. to 0236.dwg AR 0082518. ORDNANCE SURVEY IRELAND & TRANSPORT INFRASTRUCTURE DERRYREAG CULVERT (KY-N22-028.00) GOVERNMENT OF IRELAND IRELAND (TII) PROPOSED REMEDIAL WORKS ATKINS NOT TO BE HELD LIABLE FOR THE USE SHEET 2 0F 2 OF THIS DATA ON ANY PROJECT OTHER THAN THE MUNSTER BRIDGES TERM MAINTENANCE CONTRACT NR.3 PROJECT AOS MG MJ 1:100 14/05/20 14/05/20 14/05/20 MUNSTER BRIDGES TERM May 20, 2020 - 5:47pm - ISSUED FOR REVIEW AOS 05/20 MJ MJ MAINTENANCE CONTRACT NR.3 Date: File: 5162555-HTR-DR-0235 P 5162555 / HTR / DR / 0236 -
V:\5162555\6 Dwgs-Graphics\61 AutoCad\5162555-HTR-DR-0235 to 0236.dwg
© WS Atkins Ireland Limited except where stated otherwise
Contains sensitive information 5162160DG0005 | 0.0 | March 2020 Atkins | Derryreag Culvert Capacity Assessment.docx Page 23 of 23
Appendix D. Section 50 Consent
5162555DG0025 | 3 | 19/03/2021 Atkins | 5162555DG0025 rev 3 - Derryreag NIS.docx Page 49 of 54
I refer to the above Section 50 applications.
This application was received from Atkins Ireland Ltd on behalf of Transport Infrastructure Ireland and arises due to the proposed works for the Derryreag culverts on the N22 National Road.
The documentation submitted has been examined and I am to confirm that the consent of the Commissioners of Public Works under Section 50 of the Arterial Drainage Act, 1945 is given to the proposed culvert/bridge with the following recommendations:
Recommendation
1) The proposed works should be designed to be resistant to scour. This is the applicants/designers responsibility. 2) Detail design for the proposed scheme is the responsibility of the applicant. 3) It is the applicant’s responsibility to satisfy themselves that all works planned and undertaken are in compliance with all current environmental and ecological legislation.
It should be noted that consent is given only for the purpose of Section 50 and does not absolve the recipient of responsibility for any adverse effects caused by this installation to any third party.
The Commissioners of Public Works are not responsible and accept no liability for any loss or damage whatsoever caused as a result of this development.
Yours sincerely,
______
© WS Atkins Ireland Limited except where stated otherwise
5162555DG0025 | 3 | 19/03/2021 Atkins | 5162555DG0025 rev 3 - Derryreag NIS.docx Page 50 of 54