Office of Public Works Arterial Drainage Maintenance Works - Killimor Arterial Drainage Scheme
Stage 2: Natura Impact Statement
October 2014
Office of Public Works Main Street Headford Co Galway Ireland
JBA Project Manager Jonathan Cooper 24 Grove Island Corbally Limerick Ireland Revision History
Revision Ref / Date Issued Amendments Issued to
Nathy Gilligan, OPW Draft Report / September 2014 Denise Delaney, OPW Minor changes to report Nathy Gilligan, OPW Final Report / October 2014 following OPW comments. Denise Delaney, OPW Completion of Appendix A. Integration of field survey Nathy Gilligan, OPW Final Report / November 2014 results into the main report Denise Delaney, OPW Contract This report describes work commissioned by Christine McCann, on behalf of the Office of Public Works (OPW), by a letter dated 28th April 2014. OPW’s representatives for the contract were Nathy Gilligan and Denise Delaney of the OPW. Declan Egan, Tom Sampson, Connie Sampson, Laura Thomas, Aaron Birchmore and Rachael Brady of JBA Consulting carried out this work.
Prepared by ...... Laura Thomas BA MRes MCIEEM Senior Ecologist
Reviewed by ...... Rachael Brady BSc MSc PGCert MCIEEM Senior Ecologist Purpose This document has been prepared as a Final Report for the OPW. JBA Consulting accepts no responsibility or liability for any use that is made of this document other than by the Client for the purposes for which it was originally commissioned and prepared. JBA Consulting has no liability regarding the use of this report except to the OPW.
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Copyright © JBA Consulting Engineers and Scientists Ltd 2014 Carbon Footprint A printed copy of the main text in this document will result in a carbon footprint of 198g if 100% post-consumer recycled paper is used and 198g if primary-source paper is used. These figures assume the report is printed in black and white on A4 paper and in duplex. JBA is aiming to reduce its per capita carbon emissions.
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Executive Summary JBA Consulting has been commissioned by the Office of Public Works (OPW) to provide environmental consultancy services in relation to statutory arterial drainage maintenance activities for 2014. Following the methodology outlined in Ryan Hanley (2014a), a screening assessment was conducted to assess the likely significant effects on Natura 2000 sites of the proposed drainage maintenance activities in the Killimor Arterial Drainage Scheme in accordance with Article 6(3) of the Habitats Directive (Council Directive 92/43/EEC on the conservation of natural habitats and of wild fauna and flora). Three source > pathway > receptor chains were examined to assess the likely impact of drainage maintenance activities on Natura 2000 sites; surface water, land and air, and groundwater pathways. The results of this screening exercise identified that significant adverse impacts could not be excluded on the following Natura 2000 sites: Ardgraigue Bog SAC (002356) Barroughter Bog SAC (000231) Lough Derg, North-East Shore SAC (002241) Lough Derg (Shannon) SPA (004058) Slieve Aughty Mountains SPA (004168) As a result it was necessary to conduct a Stage 2 Appropriate Assessment to further examine the potential direct and indirect impacts of the proposed works on the integrity and interest features of the above Natura 2000 sites, alone and in-combination with other plans and projects, taking into account the site's structure, function and conservation objectives. Further examination of the potential sources of impact on the Natura 2000 sites above, looking at surface water, land and air and groundwater pathways, was conducted. Where potentially significant adverse impacts were identified, a range of mitigation and avoidance measures have been stipulated to help offset them. As a result of this Appropriate Assessment it has been concluded, that given the avoidance and mitigation measures suggested, the proposed drainage maintenance operations in the Killimor Arterial Drainage Scheme will not have a significant adverse impact on the above Natura 2000 sites.
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Contents
Executive Summary ...... iii 1 Introduction ...... 1 1.1 Background ...... 1 1.2 Legislative Context ...... 1 1.3 Appropriate Assessment Process ...... 1 1.4 Methodology ...... 2 2 Arterial Drainage Maintenance ...... 4 2.1 Background ...... 4 2.2 Drainage Maintenance Activities ...... 4 2.3 The Killimor Arterial Drainage Scheme ...... 10 2.4 Drainage Maintenance Works Proposed for the Killimor Arterial Drainage Scheme ...... 10 3 Screening Assessment Results ...... 12 3.1 Introduction ...... 12 3.2 Screening Assessment Conclusions ...... 14 4 Natura 2000 Sites within the Zone of Influence of Drainage Maintenance Activities ...... 16 4.1 Introduction ...... 16 4.2 Ardgraigue Bog SAC (002356) ...... 16 4.3 Barroughter Bog SAC (000231) ...... 17 4.4 Lough Derg, North-East Shore SAC (002241) ...... 18 4.5 Lough Derg (Shannon) SPA (004058) ...... 20 4.6 Slieve Aughty Mountains SPA (004168) ...... 21 4.7 Description of the receiving environment - Ecological Walkover Survey Results . 22 4.8 Consultation Responses ...... 29 5 Appropriate Assessment ...... 31 5.1 Introduction ...... 31 5.2 Identification of Potential Sources of Impact ...... 31 5.3 Impact Assessment ...... 35 6 Avoidance and Mitigation Measures ...... 44 6.1 Introduction ...... 44 6.2 Mitigation for Other Ecological Receptors ...... 45 6.3 Mitigation for Bridge/Structure Works ...... 46 7 Conclusions ...... 48 Appendices...... I A OPW Arterial Drainage Maintenance Service: Environmental Management Protocols and Standard Operating Procedures ...... I B Drainage Maintenance Activities Proposed for Killimor 2015-2019 ...... II
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List of Figures Figure 1-1: The Appropriate Assessment Process (from: Appropriate Assessment of Plans and Projects in Ireland - Guidance for Planning Authorities, DEHLG, 2009) ...... 1 Figure 2-1: Plane Bed to Low Gradient Channels in Killimor Arterial Drainage Scheme (D1 left; Cappagh River C1 right) ...... 5 Figure 2-2: Medium to High Gradient Channels in the Killimor Arterial Drainage scheme (both taken on C2/10/1) ...... 6 Figure 2-3: Map of the Killimor Scheme ...... 1 0 Figure 3-1: Channels and embankments with potential impacts via surface water pathways ...... 1 2 Figure 3-2: Channels and embankments with potential impacts via land and air pathways ...... 1 3 Figure 3-3: Channels and embankments with potential impacts via groundwater pathways ...... 1 4 Figure 3-4: Map of all channels, embankments and structures where significant likely effects may arise ...... 1 5 Figure 4-2: Japanese Knotweed near Channel C2/2 ...... 2 7 Figure 4-3: Roe Deer sighted adjacent to Channel C2/10/1 and Otter holt recorded on Channel C2/2 ...... 2 7 Figure 4-4: Fox sighted adjacent to Channel C2/10/1 ...... 2 8 Figure 4-5: Blue-eyed Grass adjacent to channel C1/1 ...... 2 8
List of Tables Table 2-1: OPW Drainage Maintenance Subcategories ...... 4 Table 2-2: OPW Drainage Maintenance Types ...... 4 Table 3-1: Screening Assessment Conclusions ...... 1 4 Table 4-1: Qualifying Interests of Ardgraigue Bog SAC (002356) ...... 1 6 Table 4-2: Qualifying Interests of Barroughter Bog SAC (000231) ...... 1 2014s1164 Killimor Natura Impact Statement v2.4
7 Table 4-3: Qualifying Interests of Lough Derg, North-East Shore SAC (000231) ...... 1 9 Table 4-4: Special Conservation Interests of Lough Derg (Shannon) SPA (004058) ...... 2 0 Table 4-5: Special Conservation Interests of Slieve Aughty Mountains SPA (004168) ...... 2 2 Table 4-1: Annex I Habitats within Killimor Arterial Drainage Scheme ...... 2 4 Table 4-2: Bird Species Recorded in Killimor Arterial Drainage Scheme ...... 2 8 Table 4-4: Consultation Responses ...... 2 9 Table 5-1: Potential Sources of Impact via Surface Water Pathways ...... 3 2 Table 5-2: Potential Sources of Impact via Land and Air Pathways ...... 3 3 Table 5-3: Potential Sources of Impact via Groundwater Pathways ...... 3 4 Table 5-4: Impact Prediction ...... 3 6 Table 6-1: Specific Mitigation Measures ...... 4 4 Table 6-2: Specific Mitigation Measures for other Ecological Receptors ...... 4 5 Table 6-3: Pre-works mitigation checklist for bridge/structure works ...... 4 7 Table 7-1: Integrity of Site Checklist (from DEHLG, 2009) ...... 4 8
Abbreviations COSD ...... Conservation Objective Supporting Document DEHLG ...... Department of Environment, Heritage and Local Government EPA ...... Environmental Protection Agency GIS ...... Geographical Information System 2014s1164 Killimor Natura Impact Statement v2.4 2
GWB ...... Groundwater Body GWD ...... Groundwater Dependent IFI ...... Inland Fisheries Ireland IROPI ...... Imperative Reason of Overriding Public Interest NHA ...... Natural Heritage Area NPWS ...... National Parks and Wildlife Service OPW ...... Office of Public Works SAC ...... Special Area of Conservation SPA ...... Special Protection Area SWD ...... Surface Water Dependent WFD ...... Water Framework Directive
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1 Introduction
1.1 Background JBA Consulting has been commissioned by the Office of Public Works (OPW) to provide environmental consultancy services in relation to statutory arterial drainage maintenance activities that will take place over the five-year period 2015-2019. This Natura Impact Statement (NIS) provides the results of the Appropriate Assessment conducted for the Killimor Arterial Drainage Scheme in accordance with Article 6(3) of the Habitats Directive (Council Directive 92/43/EEC on the conservation of natural habitats and of wild fauna and flora). A screening assessment has previously been conducted for the Killimor Arterial Drainage Scheme (JBA Consulting, 2014) and determined that significant adverse effects on Natura 2000 sites are likely within the zone of influence of the proposed arterial drainage maintenance activities.
1.2 Legislative Context The Habitats Directive (Council Directive 92/43/EEC on the conservation of natural habitats and of wild fauna and flora) aims to maintain or restore the favourable conservation status of habitats and species of community interest across Europe. The requirements of this Directive are transposed into Irish law through the European Communities (Birds and Natural Habitats) Regulations) 2011 (S.I. No. 477 of 2011). Under the Directive a network of sites of nature conservation importance have been identified by each Member State as containing specified habitats or species requiring to be maintained or returned to favourable conservation status. In Ireland the network consists of Special Areas of Conservation (SACs) and Special Protection Areas (SPAs), and also candidate sites, which form the Natura 2000 network. Article 6(3) of the Habitats Directive requires that, in relation to European designated sites (i.e. SACs and SPAs that form the Natura 2000 network), "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". A competent authority (e.g. the OPW or Local Authority) can only agree to a plan or project after having determined that it will not adversely affect the integrity of the site concerned. Under article 6(4) of the Directive, if adverse impacts are likely, and in the absence of alternative options, a plan or project must nevertheless proceed for imperative reasons of overriding public interest (IROPI), including social or economic reasons, a Member State is required to take all compensatory measures necessary to ensure the overall integrity of the Natura 2000 site. The European Commission have to be informed of any compensatory measures adopted, unless a priority habitat type or species is present and in which case an opinion from the European Commission is required beforehand (unless for human health or public safety reasons, or of benefit to the environment).
1.3 Appropriate Assessment Process Guidance on the Appropriate Assessment (AA) process was produced by the European Commission in 2002, which was subsequently developed into guidance specifically for Ireland by the Department of Environment, Heritage and Local Government (DEHLG) (2009). These guidance documents identify a staged approach to conducting an AA, as shown Figure 1-1.
Stage 1 Stage 2 Stage 3 Stage 4
Screening for AA AA Alternative Solutions IROPI
Figure 1-1: The Appropriate Assessment Process (from: Appropriate Assessment of Plans and Projects in Ireland - Guidance for Planning Authorities, DEHLG, 2009)
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1.3.1 Stage 1 - Screening for AA The initial, screening stage of the Appropriate Assessment is to determine: a. whether the proposed plan or project is directly connected with or necessary for the management of the European designated site for nature conservation b. if it is likely to have a significant adverse effect on the European designated site, either individually or in combination with other plans or projects For those sites where potential adverse impacts are identified, either alone or in combination with other plans or projects, further assessment is necessary to determine if the proposals will have an adverse impact on the integrity of a European designated site, in view of the sites conservation objectives (i.e. the process proceeds to Stage 2).
1.3.2 Stage 2 - AA This stage requires a more in-depth evaluation of the plan or project, and the potential direct and indirect impacts of them on the integrity and interest features of the European designated site(s), alone and in-combination with other plans and projects, taking into account the site's structure, function and conservation objectives. Where required, mitigation or avoidance measures will be suggested. 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 mitigation cannot be achieved, then alternative solutions will need to be considered (i.e. the process proceeds to Stage 3).
1.3.3 Stage 3 - Alternative Solutions Where adverse impacts on the integrity of Natura 2000 sites are identified, and mitigation cannot be satisfactorily implemented, alternative ways of achieving the objectives of the plan or project that avoid adverse impacts need to be considered. If none can be found, the process proceeds to Stage 4.
1.3.4 Stage 4 - IROPI Where adverse impacts of a plan or project on the integrity of Natura 2000 sites are identified and no alternative solutions exist, the plan will only be allowed to progress if imperative reasons of overriding public interest (IROPI) can be demonstrated. In this case compensatory measures will be required.
The process only proceeds through each of the four stages for certain plans or projects. For example, for a plan or project, not connected with management of a site, but where no likely significant impacts are identified, the process stops at stage 1. Throughout the process, the precautionary principle must be applied, so that any uncertainties do not result in adverse impacts on a site.
1.4 Methodology This NIS has been prepared with regard to the following documents: Department of Environment, Heritage and Local Government (2009) Appropriate Assessment of Plans and Projects in Ireland - Guidance for Planning Authorities Ryan Hanley (2014a) Office of Public Works Arterial Drainage Maintenance Environmental Services 2013. Stage 1: Appropriate Assessment Screening Methodology for the Maintenance of Arterial Drainage Schemes. Methodology. Unpublished Report. Ryan Hanley (2014c) Office of Public Works Arterial Drainage Maintenance Service 2014- 2018. Source > Pathway > Receptor Chains for Appropriate Assessment. Unpublished Report. National Parks and Wildlife Service (NPWS) Site synopsis, Natura 2000 data forms and Conservation Objectives
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1.4.1 Ecological Walkover Surveys To further inform the Appropriate Assessment process, the OPW selected a number of channels within the Killimor Arterial Drainage Scheme for assessment through the undertaking of an ecological walkover survey. The selected channels are those located in, or within 100m of, a Natura 2000 site. Section 4.7 summarises the methodology and findings of these surveys. All data has been inputted into a GIS system and provided to OPW to enhance understanding of the baseline environment and inform future works.
1.4.2 Consultation To further enhance understanding of the baseline of the scheme area, consultation has been undertaken with local representatives from Inland Fisheries Ireland (IFI) and the National Parks and Wildlife Service (NPWS). Local OPW officers were also contacted for further ecological information. A summary of consultation responses is provided in Section 4.7. The findings of this assessment will be subject to consultation with the NPWS and IFI.
This report has been produced on currently available information, with the most up-to-date versions used. Where new, or updated, information becomes available the OPW will consider and review this findings of this assessment, if necessary.
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2 Arterial Drainage Maintenance
2.1 Background Between 1945 and 1995, under the Arterial Drainage Act (1945), the OPW completed 34 Arterial Drainage Schemes on river catchments, along with five estuarine embankment schemes (over 11,500km of channel and 730km of embankments). The OPW is statutorily obligated to maintain arterial drainage channels under the 1945 Arterial Drainage Act, and since their completion, maintenance of these Arterial Drainage Schemes has been ongoing, with the majority of channels maintained every five years. However, larger channels tend to be only maintained every ten years, on average.
2.2 Drainage Maintenance Activities Arterial Drainage Maintenance includes a range of operations such as silt and vegetation management, mowing and structure maintenance, as detailed in Table 2-1, and listed as channel, embankment or structure maintenance in Table 2-2 below. It is required to retain the arterial drainage scheme design capacity. Table 2-1: OPW Drainage Maintenance Subcategories Drainage Maintenance Subcategories
A Silt and vegetation management B Aquatic vegetation cutting C Bank protection D Bush cutting/Branch trimming E Tree cutting F Mulching G Mowing H Gate installation I Sluice maintenance J Bridge maintenance K Other
Table 2-2: OPW Drainage Maintenance Types Category Maintenance Type Code
Silt and vegetation management A Aquatic vegetation cutting B Bank protection C Channel Maintenance Bush cutting/Branch trimming D Tree cutting E Other K Bush cutting/Branch trimming D Tree cutting E Embankment Mulching F Maintenance Mowing G Gate installation H Sluice maintenance I Bridge maintenance J Structural Maintenance Bank protection C Bush cutting/Branch trimming D Tree cutting E
The following sections, taken from Ryan Hanley (2014c) and OPW (2014), provide further details on the types and nature of arterial drainage maintenance operations undertaken by the OPW.
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2.2.1 Channel Maintenance Activities The majority of drainage maintenance activities are focused on channel maintenance. While the frequency of maintenance on an individual channel may vary, with some channels requiring maintenance annually and others only requiring maintenance every twenty years, the average channel requires maintenance every four to six years. In this regard, approximately 2,000km of channels are maintained annually and nearly all of the 11,500km of channels across Irelands Arterial Drainage Schemes will have been maintained at least once over a period of five years. Channel maintenance is organised on a regional basis, with OPW Arterial Drainage Maintenance Regional Offices in Limerick, Headford, Co. Galway and Trim, Co. Meath. Scheme Design Standards Arterial Drainage Schemes constructed under the Arterial Drainage Act, 1945 were designed to provide an outfall for drainage of agricultural lands, and generally provided protection for a 3-year flood event. Where the creation of an outfall dictated the design bed levels, greater protection than the 3-year flood event was achieved as a consequence. In the case of modern flood relief schemes, flood protection for a 100-year flood event would be the design objective. The original Scheme designs including the outfall datum for each of the Arterial Drainage Schemes are available in the relevant OPW Arterial Drainage Maintenance Regional Office. This includes the mapped Scheme design, and the associated long sections and cross sections. These designs are used to inform channel maintenance. Types of Channel Requiring Maintenance In the years following the construction of a drainage scheme there is a tendency for the channel capacity to be progressively reduced due mainly to the transportation and deposition of bed materials, the accumulation of silt and the growth of in-channel vegetation. The resultant channel maintenance consists of repetitive works of a cyclical nature, to restore the Schemes design levels i.e. outfall datum in order to maintain the channel's designed capacity to convey water. Channels are prioritised for maintenance based on the rate of deterioration and the risk arising. The selection takes account of requests from the general public and potential flooding risk to roads, properties, urban areas and sewage works (OPW, 2011a). Plane Bed to Low Gradient Channels Some 60 – 70% of maintained channels are of gentle longitudinal gradient and subject to relatively rapid deposition of silt, especially those that are subject to prolific growth of in-channel vegetation. The majority of maintenance works are therefore located on smaller lower-lying channels, with 90% of works in channels with a base width of <3m (OPW, 2011a). In such channels silt and in- channel vegetation may cause the low flow level to rise by 50-300mm above the Scheme design level. In such circumstances maintenance is focused on restoring both low-flow and flood-flow water levels to original Scheme design. Figure 2-1: Plane Bed to Low Gradient Channels in Killimor Arterial Drainage Scheme (D1 left; Cappagh River C1 right)
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Medium to High Gradient Channels A smaller proportion of channels are steep and fast flowing and are subject to flash floods, bank erosion and rapid movement of bed gravel. The steeper sections of channel normally require relatively little and infrequent maintenance works (OPW, 2011a) as opposed to channels of low gradient which are subject to rapid accumulation of silt and proliferation of vegetation. These channels will have a greater requirement for bank protection works. Figure 2-2: Medium to High Gradient Channels in the Killimor Arterial Drainage scheme (both taken on C2/10/1)
Periods and Cycles of Maintenance The average channel requires silt and vegetation management every four to six years. However, channels with prolific weed growth may require maintenance annually, particularly where downstream bridges are at risk of being blocked due to a flow of decaying vegetation in autumn. Conversely, some channels may only require in-stream maintenance every twenty years due to the self-cleaning characteristics e.g. high gradient channels. Where the period between previous channel maintenance works has been exceptionally long, dense scrub and woody vegetation can establish along the channel and within the maintenance access corridor. In such circumstances, drainage maintenance works will include the removal of scrub/transitional woodland (WS1) that has developed along the banksides via bush cutting/branch trimming, tree cutting or mulching. This is undertaken between the 1st September and 28th February to avoid the residential bird nesting season (from the 1st March to 31st August as per the Wildlife Act (1976). In contrast, in-stream works for silt and vegetation management are carried out outside of the salmonid spawning season (May to September) and the times that early life stages of salmonid fish will be present as per Section 173 of the Fisheries (Consolidation) Act (1959) on channels with salmonid spawning habitat. Any works required during this period are carried out in consultation with IFI. As a result there may be a two stage approach to the works, with silt and in-stream vegetation management carried out during the open season (i.e. summer months), while woody vegetation removal is carried out in the winter months. Other restrictions on works may also apply in relation to the presence/absence of other protected species such as White-clawed Crayfish and Sea, River and Brook Lamprey which will influence the timing of works.
2.2.2 Embankment Maintenance Activities A total of 5 No. Estuarine Embankment Schemes were constructed under the 1945 Act. In Addition a number of the Arterial Drainage Schemes have embanked sections, including sections of the Killimor Arterial Drainage Scheme. Scheme Design Standards As above for the Arterial Drainage Schemes, Estuarine Embankment Schemes constructed under the Arterial Drainage Act 1945 were designed to provide an outfall for drainage of agricultural lands, and generally provided protection for a 3-year flood event. Where the creation of an outfall dictated the design bed levels, greater protection than the 3-year flood event was achieved as a consequence. In the case of modern flood relief schemes, flood protection for a 100-year flood event would be the design objective. 2014s1164 Killimor Natura Impact Statement v2.4 6
The original Scheme designs are available in the relevant OPW Arterial Drainage Maintenance Regional Office. This includes the mapped Scheme design, and the associated long sections and cross sections. Types of Embankments Requiring Maintenance All embankments and associated sluice structures (see section 2.2.3) are inspected annually for signs of disrepair. Regular inspections are carried out on sections of embankments, which are known from experience to be at risk, together with additional inspections after a storm surge at sea or a high tidal/flood event. Maintenance of embankments includes removal of vegetation to allow for inspection of the embankment, and in some cases the replacement of existing fencing with gates to allow for future access during maintenance.
2.2.3 Structural Maintenance Activities Structural Design Standards During the construction of the Arterial Drainage Schemes under the 1945 Act, some 18,500 No. accommodation bridges were identified and modified, or replaced as required. These bridges provide farmers owning land on both sides of a channels with farm vehicular and/or foot access from one side to the other. The type of bridge provided depended on the width, depth and required flow capacity of the channel, and ranged from concrete piped culverts to relatively large structures formed on concrete or masonry abutments spanned by structural steel beams, or lattice girders together with concrete or timber decking. During the Estuarine Embankment Schemes under the 1945 Act, existing sluice structures were identified and modified, or replaced as required. Additional sluice structures were constructed as required bringing the total number to approximately 750. The function of these sluice structures is to allow water from the floodplain behind the embankments to discharge to the main river or estuary. Types of Structures Requiring Maintenance In general, as channel maintenance proceeds, the bridges are examined by the supervisory industrial staff and if required, repairs/replacements are scheduled. The type of bridge structures, which are most likely to have fallen into a critical state of disrepair, are those with timber decking supported on steel beams, and those in which abutment foundations are being undercut. There is a standard type of design for the replacement of these structures, which consists essentially of mass concrete abutments with reinforced cast in-situ decking. This type of structure is simple to construct and under normal circumstances, it will last for many years with little or no maintenance. On many occasions, it is not necessary to totally replace a bridge, and repairs such as underpinning the foundation or replacement of wing-walls, parapets or sections of the deck may be all that is required to extend the useful life of the structure. All embankments and associated structures are inspected annually for disrepair. Due to the time elapsed since scheme completion, some of these sluice structures have reached their design life and have started to fail. In this instance, full replacement is required. Typically, this involves the installation of pre-cast headwalls and back walls, and the replacement of existing corrugated galvanised steel pipes with PVC plastic pipes. Sluice doors are the most frequent part of the sluice structure that are required to be repaired or replaced. Repairs to a sluice door consist of replacing the arms/hinges on the existing cast iron door. On occasion, the existing cast iron door would be replaced with a high-density polyethylene (HDPE) door. Blockages often occur at the doors of the sluices due to silt build up. These blockages are removed using along reach excavator working from the bank of the channel.
2.2.4 Plant and Machinery The types of machinery typically utilised during maintenance works would include 3600 hydraulic excavators (from 15-20 tonne excavators), mini-diggers, tractors and trailers, tipper lorries, hydraulic shears, weed cutting equipment, chainsaws, mulchers and mowers; the machinery used is dependent on the maintenance activity being conducted. The removal of dense in-stream silt and vegetation requires the use of a hydraulic excavator with a 1.5m wide (approximate) bucket (capacity approximate 500ltrs). For standard excavators, works 2014s1164 Killimor Natura Impact Statement v2.4 7
progress at a rate of 700m to 900m per week. In relation to long-reach excavators, works progress at a slower rate of between 200m and 350m per week. Rates may change due to channel width or ground conditions.
2.2.5 Maintenance Access Corridors (MAC) and Working Zone Maintenance sites are generally accessed via the public road and through farmland. A maintenance access corridor is utilised along one side of a channel for maintenance purposes. These established routes are used to track the hydraulic excavators for maintenance and for the disposal of spoil (see section 2.2.7). The same route is generally followed every maintenance cycle. This approach avoids disturbance of habitats on the opposite bank during works. Where grasslands are present within the maintenance access corridor, the impact is predominantly temporary as the grasslands are trampled by machinery and can recolonise following completion of the maintenance activities. Within woodland and scrub habitats a linear path more typical of disturbed vegetation i.e. scrub/transitional woodland (WS1) will be evident along the maintenance access corridor due to regular machine access. In this regard, the disturbance regime associated with the tracking of plant machinery along the maintenance access corridors on the channel bank arrests succession to mature woodland such that scrub/transitional woodland (WS1) dominates. Where mature trees are present these are generally avoided by plant machinery. Structures are generally accessed through farmland from the public road above. Plant machinery will utilise the same maintenance access corridor used for channel maintenance to gain access to the structure. Where individual trees, woodland and scrub habitats are present at the location of the structure, these may be removed to facilitate bridge inspection and works. Where mature trees are present these are generally avoided by plant machinery. The location of drainage maintenance works is generally accessed via public roads and through farmland, with the siting of mobile short-term staff welfare facilities, plant storage and car parking agreed with local landowners. There is no requirement for temporary site lighting. There is a requirement for water supply and disposal of wastewater from the welfare facilities (see section 2.2.7 in relation to waste disposal).
2.2.6 Site Compounds (Welfare Facilities), Access Routes and Haul Roads Haul roads are generally not required to facilitate drainage maintenance activities. Where access is required in soft ground conditions, plant equipment will be brought in on tracks or temporary matting will be laid to provide a corridor for machinery access. Where matting is utilised it will be completely removed post completion of works to allow vegetation to recolonise. All plant and machinery is confined to one defined access route to minimise disturbance. All plant and machinery are regularly maintained and serviced to minimise release of hydrocarbons. All hydraulic excavators and other plant machinery use long life engine oil and biodegradable hydraulic oil. Fuelling and lubrication are conducted a minimum of 50m away from all channels. Spill kits are present in all plant used in maintenance activities. Integrated submersible pumps are also deployed in the event of structural maintenance and the requirement for dewatering of excavations.
2.2.7 Waste Output/Disposal The material removed from a channel during silt and vegetation management is normally spread thinly along the bank or on top of existing spoil heaps where present within the access corridor. All dead wood material is left on site to decompose or is removed off site and utilised as firewood under local landowner agreements. Where mulchers or mowers are deployed, the arisings are left on site to decompose or the mulched material is buried. Construction and demolition waste from structures includes broken concrete and stone. Steel railings are returned to the depot for recycling. Used engine oil and hydraulic oil is disposed of by a licensed waste handler. Toilet facilities are maintained by a licensed waste handler. Any waste generated on site is returned to the depot for segregation and disposal by a licensed waste handler.
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2.2.8 Working Hours All maintenance activities are undertaken during daylight hours. Standard working hours are 8.00am to 4.30pm, with lunch and tea breaks, Monday to Friday. There is no requirement for temporary site lighting to facilitate works. Machines are powered down when not in use.
2.2.9 Environmental Training Environmental training of all staff involved in drainage maintenance is an ongoing process. Technical and Operational Staff have completed formal training in Environmental Drainage Maintenance (EDM) in 2004. This training course was revised and expanded under the OPW’s Environmental River Enhancement Programme (EREP) and was delivered to all staff in 2010. The training programme delivered included presentations in river corridor ecology, the Environmental Drainage Maintenance Guidance Notes (Ten Steps to Environmentally Friendly Maintenance), maintenance strategies involving both ‘enhanced maintenance’ and ‘capital enhancement’, and OPW’s Environmental Management Protocols and Standard Operating Procedures (SOPs) (see section 2.2.11 for more details). Both sets of training were developed and delivered by IFI. The formal approach to EDM Training is complimented with on-site training. Regular site visits from IFI and OPW’s Environment Section provide further guidance and advice to operational staff. Auditing of operational staff on the implementation of the Environmental Drainage Maintenance Guidance Notes (Ten Steps to Environmentally Friendly Maintenance) is also carried out by both IFI and OPW’s Environment Section. In addition, other environmental training takes place as deemed beneficial, e.g. in 2008, the majority of the technical and operational staff were trained in Otter Awareness. This course, provided by the Department of Zoology, Trinity College Dublin, included presentations on Otter ecology, and on-site identification of Otter signs and suitable habitat.
2.2.10 Environmental Audits A portion of operational crews are audited annually by the OPW Environment Section and IFI for the implementation of the Environmental Drainage Maintenance Guidance Notes (Ten Steps to Environmentally Friendly Maintenance) and the OPW’s Environmental Management Protocol and SOPs. Auditing is carried out separately by both IFI and OPW Environment Section on a rotational basis to ensure all operational crews are audited at least once every three years. All audit results are forwarded to the relevant Engineer for that Scheme within two working weeks. In the event of an audit showing elements of unreasonable non-compliance with procedures, the relevant Engineer will be notified within one working day. Audit results are also forwarded to OPW Systems Manager for inclusion in monthly regional benchmarking reports.
2.2.11 Environmental Management Protocol and Standard Operating Procedures (SOPs) The OPW’s Environmental Management Protocols set out how regional management staff manage a range of environmental aspects, including programming of works to accommodate certain environmental windows or restrictions on timing of works, and recording of data. A total of 7 No. Standard Operating Procedures (SOPs) are applied during operational works. These SOPs set out actions designed to eliminate, or substantially reduce likely impacts to identified species and their associated habitats. These include: Environmental Drainage Maintenance Guidance Notes (10 Steps to Environmentally Friendly Maintenance) Lamprey SOP Crayfish SOP Otter SOP Mussel SOP Invasive Species SOP Zebra Mussel SOP Appendix A contains the OPWs Environmental Management Protocols and Standard Operating Procedures (OPW, 2011b). This document can also be downloaded from http://www.opw.ie/en/media/OPW%20Environmental%20Management%20Protocols%20&%20S OPs%20April%202011.pdf.
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2.3 The Killimor Arterial Drainage Scheme The Killimor Arterial Drainage Scheme is located in County Galway. It includes 396km of watercourse and 3.8km of embankment. The Killimor catchment has an area of 39,083ha with a total benefiting area of 5,119ha. Figure 2-3: Map of the Killimor Scheme
The construction of the scheme, started in 1962 and was completed in 1968 under the 1945 Arterial Drainage Act. Maintenance has been ongoing since completion of the scheme.
2.4 Drainage Maintenance Works Proposed for the Killimor Arterial Drainage Scheme Within the Killimor Arterial Drainage Scheme the exact location and type of required maintenance activity varies over time. The screening assessment (JBA Consulting, 2014) was conducted on the assumption that all channels and embankments will be maintained during the 5-year period 2015- 2019. However, this Appropriate Assessment is based on more detailed information provided on the timing, frequency and nature of maintenance operations to be conducted on each channel and embankment. During the period 2015 to 2019 a range of maintenance activities are proposed for the watercourses in the Killimor Arterial Drainage Scheme, including: A - Silt and vegetation management B - Aquatic vegetation cutting C - Bank protection D - Bush cutting/Branch trimming E - Tree Cutting It is currently not known where structural maintenance operations, or embankment maintenance activities F, G and H, as detailed in Table 2-1, are proposed, and therefore it will be assumed that potentially these activities could occur on all embankments and structures within the scheme area during the period 2015 -2019.
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The spreadsheet in Appendix B provides full details of the drainage maintenance activities proposed for the Killimor Arterial Drainage Scheme for the period 2015 to 2019. It should be noted that: Channels C1/1 and C1/1/1 are not scheduled for maintenance during the plan period (2015-2019) due to their proximity to Barroughter Bog SAC. Furthermore the lower reaches of channel C1 are not maintained due to the presence of this SAC. Channels C1/20/13, C1/20/15, C1/20/16, C1/20/17 and C1/20/31/1 are not scheduled for maintenance during the plan period due to the presence of Marsh Fritillary Butterfly. This has been agreed with local NPWS representatives.
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3 Screening Assessment Results
3.1 Introduction An Appropriate Assessment screening assessment, addressing Stage 1 of the process, has already been completed for Killimor Arterial Drainage Scheme (JBA Consulting, 2014). This identified that likely significant effects on Natura 2000 may occur as a result of the proposed maintenance activities and therefore a Stage 2 Appropriate Assessment is necessary. The Stage 1 Screening Assessment was conducted in line with guidance produced for the OPW in 2014 (Ryan Hanley, 2014a, b and c). This methodology is based on source > pathway > receptor chain principles and involves assessing likely significant effects on Natura 2000 sites within the zone of influence of the proposed drainage maintenance in relation to three pathways: 1. Surface water 2. Land & air 3. Groundwater The screening assessment involved assessing the impacts of drainage maintenance operations within the arterial drainage scheme, and its zone of influence, in relation to each of the three pathways individually. Conclusions were then drawn to identify which channels and embankments within a scheme could impact upon Natura 2000 sites.
3.1.1 Surface Water Pathways As a result of the screening assessment (JBA Consulting, 2014) maintenance activities on those watercourses and embankments shown in Figure 3-1 were identified as potentially resulting in significant adverse impacts on Natura 2000 sites via surface water pathways. Specifically, the Natura 2000 sites that may be adversely impacted upon are: Lough Derg, North-East Shore SAC (002241) Lough Derg (Shannon) SPA (004058) Figure 3-1: Channels and embankments with potential impacts via surface water pathways
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3.1.2 Land & Air Pathways As a result of the screening assessment (JBA Consulting, 2014) maintenance activities on those watercourses and embankments shown in Figure 3-2 were identified as potentially resulting in significant adverse impacts on Natura 2000 sites via land and air water pathways. Specifically, the Natura 2000 sites that may be adversely impacted upon are: Barroughter Bog SAC (000231) Lough Derg, North-East Shore SAC (002241) Lough Derg (Shannon) SPA (004058) Slieve Aughty Mountains SPA (004168) Figure 3-2: Channels and embankments with potential impacts via land and air pathways
3.1.3 Groundwater Pathways As a result of the screening assessment (JBA Consulting, 2014) maintenance activities on those watercourses and embankments shown in Figure 3-3 were identified as potentially resulting in significant adverse impacts on Natura 2000 sites via groundwater pathways. Specifically, the Natura 2000 sites that may be adversely impacted upon are: Ardgraigue Bog SAC (002356) Barroughter Bog SAC (000231) Lough Derg, North-East Shore SAC (002241) Lough Derg (Shannon) SPA (004058)
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Figure 3-3: Channels and embankments with potential impacts via groundwater pathways
3.2 Screening Assessment Conclusions The Screening Assessment (JBA Consulting, 2014) identified that the sites detailed in Table 3-1 were likely to be significantly affected by drainage maintenance operations undertaken within the Killimor Arterial Drainage Scheme. These conclusions are based on the assumption that all drainage maintenance activities are to be undertaken on all watercourses, embankments and structures during the life of the plan (2015-2019). Table 3-1: Screening Assessment Conclusions Pathway of Impact Comment Site Surface Land Ground Water and Air water Drainage maintenance activities are some Ardgraigue Bog SAC (002356) distance outside of the site, but still potential for adverse effects through groundwater pathways Drainage maintenance activities are proposed for within Natura 2000 site, but no surface water Barroughter Bog SAC (000231) dependent habitats/species are present so only impacts via land and air and groundwater pathways Drainage maintenance activities are proposed Lough Derg, North-East Shore for within Natura 2000 site and have the SAC (002241) potential to impact on features via all pathways. Drainage maintenance activities are proposed Lough Derg (Shannon) SPA for within Natura 2000 site and have the (004058) potential to impact on features via all pathways. Hen Harrier and Merlin may be impacted upon Slieve Aughty Mountains SPA via land and air pathways as site with 500m of (004168) drainage maintenance activities.
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Pathway of Impact Comment Site Surface Land Ground Water and Air water
Note: Red = likely significant effect Green = no likely significant effect
Figure 3-4: Map of all channels, embankments and structures where significant likely effects may arise
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4 Natura 2000 Sites within the Zone of Influence of Drainage Maintenance Activities
4.1 Introduction This chapter provides baseline information on the Natura 2000 sites within the Zone of Influence of the drainage maintenance activities (i.e. those screened into the assessment as detailed in Table 3-1). A short description for each site is provided, along with details of the qualifying interest/special conservation interests, conservation objectives, the attributes used to define favourable conservation status and site vulnerabilities. However, for many sites, site specific conservation objectives have not yet been developed for the qualifying interest/special conservation interest present. In these instances attributes have been taken from similar or nearby sites where the same qualifying interest/special conservation interests, or from similar habitats/species, and these are assumed to be appropriate for the sites detailed.
4.2 Ardgraigue Bog SAC (002356) Ardgraigue Bog is a site of considerable conservation significance as it comprises a raised bog, with both high bog and cutover areas. It a rare habitat in the EU and one that is becoming increasingly scarce and under threat in Ireland. It is one bog located in a cluster of raised bogs, surrounded by agricultural fields (NPWS, 2014a). The active raised bog comprises areas of high bog that are wet and actively peat-forming, where the percentage cover of bog mosses (Sphagnum spp.) is high (NPWS, 2014a). The site has a high diversity of raised bog plant species and supports a good diversity of raised bog microhabitats, including extensive hummocks and hollow, a few pools, and flushes, as well as a number of scarce plant species. It is of excellent quality on account of its high watertable and relatively undisturbed conditions (NPWS, 2014b). It also has very good lichen flora having not been burnt in over 20 years (NPWS, 2014a). Degraded raised bog corresponds to those areas of high bog where the hydrology has been adversely affected by peat cutting, drainage and other land use activities, but which are capable of regeneration (NPWS, 2014a). Ardgraigue Bog is actively cut around most of the margins of the high bog area, with cutover areas reclaimed for agricultural purposes, with drainage and burning associated damaging activities (NPWS, 2014a). The site also contains Rhynchosporion habitat that occurs in wet depressions, pool edges and erosion channels where the vegetation includes White Beak-sedge Rhynchospora alba and/or Brown Beak-sedge R. fusca, along with species such as Bog Asphodel Narthecium ossifragum, sundews Drosera spp., Deergrass Scirpus cespitosus and Carnation Sedge Carex panicea (NPWS, 2014a).
4.2.1 Qualifying Interests Table 4-1: Qualifying Interests of Ardgraigue Bog SAC (002356) Code Qualifying Interests Attributes 7110 Active raised bogs There are no site specific Conservation Objectives for raised bog, and associated habitats, which could have Degraded raised bogs been substituted. As a result, the following attributes have 7120 still capable of natural been selected based on professional judgement: regeneration - Habitat area Depressions on peat - Habitat distribution 7150 substrates of the - Hydrological regime Rhynchosporion - Vegetation composition
4.2.2 Conservation Objective The Conservation Objective for Ardgraigue Bog SAC is to maintain or restore the favourable conservation condition of the Annex I habitat(s) and/or the Annex II species for which the SAC has been selected (see Table 4-1) (NPWS, 2011a). 2014s1164 Killimor Natura Impact Statement v2.4 16
Favourable conservation status of a habitat is achieved when: its natural range, and area it covers within that range, are stable or increasing, and the specific structure and functions which are necessary for its long‐term maintenance exist and are likely to continue to exist for the foreseeable future, and the conservation status of its typical species is favourable. The favourable conservation status of a species is achieved when: population dynamics data on the species concerned indicate that it is maintaining itself on a long‐term basis as a viable component of its natural habitats, and the natural range of the species is neither being reduced nor is likely to be reduced for the foreseeable future, and there is, and will probably continue to be, a sufficiently large habitat to maintain its populations on a long‐term basis.
4.2.3 Site Vulnerabilities NPWS (2014b) identify that Ardgraigue Bog SAC is vulnerable to: Drainage effects from peat-cutting operations, which is most severe in the south-western corner of the site Fire damage is minimal, but burning remains a threat
4.3 Barroughter Bog SAC (000231) Barroughter Bog SAC is of considerable conservation value given its relatively small size, with large areas of outstanding quaking habitat (NPWS, 2013a). The bog has a good dome, the central parts of which contain actively peat-forming raised bog habitat with species such as Heather Calluna vulgaris, Hare's-tail Cotton-grass Eriophorum vaginatum, Bog Asphodel Narthecium ossifragum and Carnation Sedge Carex panicea (NPWS, 2013a). Within the wet, quaking areas of active raised bog Rhynchosporion is represented, which is dominated by White Beak-sedge, Common Cotton-grass Eriophorum angustifolium, Bogbean Menyanthes trifoliata, Sundews Drosera spp. and a range of mosses. There is also a small flushed area in the central part of the bog, which adds diversity (NPWS, 2013a). The rare moss species Sphagnum pulchrum and Brown Beak-sedge Rhynchospora fusca have been recorded from wet pools and lawns on the high bog (NPWS, 2014c). Degraded raised bog habitat however dominates the uncut high bog surface in this SAC. It is generally associated with the more marginal areas of high bog where drainage linked to peripheral peat-cutting is most pronounced. Degraded areas are usually dominated by Heather, Common Cotton-grass, Cross-leaved Heath Erica tetralix and Carnation Sedge. At this site, Sphagnum cover is generally low and there are now well-developed hummock systems, potentially due to recent fire damage (NPWS, 2013a). Its close proximity to Lough Derg increases its value, with a transition from open water through extensive reed beds and marginal scrub, to raised bog (NPWS, 2014c). Furthermore, the site also includes some wet grassland along the Cappagh River to the north-east, and an area of rocky grassland in the north.
4.3.1 Qualifying Interests Table 4-2: Qualifying Interests of Barroughter Bog SAC (000231) Code Qualifying Interests Attributes 7110 Active raised bogs There are no site specific Conservation Objectives for raised bog, and associated habitats, which could have been Degraded raised bogs substituted. As a result, the following attributes have been 7120 still capable of natural selected based on professional judgement: regeneration - Habitat area Depressions on peat 7150 substrates of the - Habitat distribution Rhynchosporion - Hydrological regime
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Code Qualifying Interests Attributes - Vegetation composition
4.3.2 Conservation Objective The Conservation Objective for Barroughter Bog SAC is to maintain or restore the favourable conservation condition of the Annex I habitat(s) and/or the Annex II species for which the SAC has been selected (see Table 4-2) (NPWS, 2011b). Section 4.2.2 above details the criteria used to assess favourable condition.
4.3.3 Site Vulnerabilities NPWS (2014c) identify that Barroughter Bog SAC is vulnerable to: The effects of mechanical peat cutting which is occurring around 95% of the bog margins. Drains associated with the peat cutting are also causing water loss from the bog, and also fen areas. Burning is a significant threat, particularly in the drier marginal areas.
4.4 Lough Derg, North-East Shore SAC (002241) Lough Derg is the lowest order lake on the River Shannon and one of the largest freshwater bodies in Ireland. However, this SAC only includes the northern shore of the lake from the mouth of the Cappagh River in the north-west, to just below Black Lough at the north-eastern shore (NPWS, 2014d). The SAC is designated for a number of important habitat types, primarily associated with calcareous and wetland environments. Where the limestone geology protrudes along the lake shoreline, such as at Cornalack, Kylenamelly and Portumna, it is classified as limestone pavement. It is often bryophyte-rich or supporting calcareous grassland or heath flora, as well as some woody species such as Yew Taxus baccata and Juniper Juniperus communis (NPWS, 2014d). Occasionally around the lake margins fen habitats dominated by dense stands of Great Fen-sedge Cladium mariscus are present. This species generally merges into alkaline fen communities dominated by Black Bog-rush Schoenus nigricans, Purple Moor-grass Molinia caerulea, Marsh Horsetail Equisetum palustre, Meadowsweet Filipendula ulmaria and tussocks of Greater Tussock-sedge Carex paniculata (NPWS, 2014d). The SAC also contains a number of wood and scrub habitats. On limestone at Cornalack, Yew forms a scrub woodland along the east shore of Lough Derg. Juniper scrub also occurs throughout the site in a range of habitats, such as calcareous grasslands, heath and limestone outcrops. Some of the best Juniper formations in Ireland occur along the lake edge, where upright, bushy Juniper shrubs can be up to 3m tall; a unique feature in Ireland where Juniper tends to be found growing in a more prostrate habit (NPWS, 2014d). Wet woodland is also frequent along the lake shore, for example at Kylenamelly Wood and Portunmna. These woodlands are dominated by Willows Salix spp., Alder Alnus glutinosa with Downy Birch Betula pubescens and Ash Fraxinus excelsior. Ground flora, where woodlands are undisturbed, is dominated by Yellow Iris Iris pseudacorus with a range of other wetland species. Other areas of deciduous woodland are also present within the site, including areas dominated by Oak Quercus spp., Hazel Corylus avellana and Ash. Whilst not specifically designated for any species, the site is of importance for a wide range of different species, including the Red Data Book plants Irish Fleabane Inula salicina (also protected under the Flora (Protection) Order 1999) which occurs along the lake shore, Marsh Pea Lathyrus palustris and Ivy Broomrape Orobanche hederae. The lake is also important for waterfowl (see section 4.5), fish (e.g. lampreys, Pollan Coregonus autumnalis, trout Salmo trutta and Atlantic Salmon Salmo salar), freshwater invertebrates, Otter and Badger.
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4.4.1 Qualifying Interests Table 4-3: Qualifying Interests of Lough Derg, North-East Shore SAC (000231) Code Qualifying Interests Attributes - Habitat area - Habitat distribution - Juniper population size Juniperus communis - Formation structure: cover and height, community 5130 formations on heaths or diversity and extent, cone-bearing plants, seedling calcareous grasslands recruitment, dead plants - Vegetation composition: typical species, negative indicator species From: Galway Bay Complex SAC Conservation Objective Supporting Document (COSD) (NPWS, 2013b) Calcareous fens with - Habitat area Cladium mariscus and 7210 - Habitat distribution species of the Caricion davallianae - Hydrological regime - Peat formation - Water quality: nutrients - Vegetation composition: typical species, trees and 7230 Alkaline fens shrubs - Physical structure: disturbed bare ground, drainage From: Galway Bay Complex SAC Conservation Objective Supporting Document (COSD) (NPWS, 2013b) There are no Site Specific Conservation Objectives for limestone pavement available which could have been used in this assessment. As a result, the following attributes have been proposed based on Ryan Hanley 8240 Limestone pavements (2014c). - Habitat area - Habitat distribution - Vegetation composition: typical species, notable species - Habitat area - Habitat distribution - Woodland size Alluvial forests with - Woodland structure: cover and height, community Alnus glutinosa and diversity and extent, natural regeneration, dead wood, 91E0 Fraxinus excelsior veteran trees, indicators of local distinctiveness (Alno-Padion, Alnion incanae, Salicion albae) - Hydrological regime: flooding depth/height of water table - Vegetation composition: native tree cover, typical species, negative indicator species From: Lower River Shannon SAC Conservation Objectives (NPWS, 2012d) There are no Site Specific Conservation Objectives for Yew woodlands available which could have been used in this assessment. As a result, the following attributes have Taxus baccata woods of 91J0 been proposed based on Ryan Hanley (2014c). the British Isles - Habitat area - Habitat distribution - Woodland size 2014s1164 Killimor Natura Impact Statement v2.4 19
Code Qualifying Interests Attributes - Woodland structure: cover and height, community diversity and extent, natural regeneration, dead wood, veteran trees, indicators of local distinctiveness - Vegetation composition: native tree cover, typical species, negative indicator species
4.4.2 Conservation Objective The Conservation Objective for Lough Derg, North-East Shore SAC is to maintain or restore the favourable conservation condition of the Annex I habitat(s) and/or the Annex II species for which the SAC has been selected (see Table 4-3) (NPWS, 2011c). Section 4.2.2 above details the criteria used to assess favourable condition.
4.4.3 Site Vulnerabilities NPWS (2014e) identify that Lough Derg, North-East Shore SAC is vulnerable to: Water polluting operations from the surrounding agricultural activities. Wetland habitats are threatened by private and holiday home developments and the construction of new marinas and jetties at the lake edge. Waterfowl are vulnerable to disturbance from boating activities. The introduction of Zebra Mussel Dreissena polymorpha threatens the ecology of some aquatic ecosystems within the lake. Further planting of commercial trees or the spread of exotic species would be damaging to the woodland habitats in the SAC.
4.5 Lough Derg (Shannon) SPA (004058) Lough Derg is the largest of the Shannon Lakes, approximately 40km long, with mesotrophic conditions and an alkaline pH due to its mainly limestone catchment. Its maximum breadth across the Scarriff Bay -Youghal Bay is 13km, but for the most part it is less than 5km wide. It is relatively shallow at the northern end (approximately 6m in depth), but descends to over 25m depth in places (NPWS, 2004). The lake is important for both breeding and wintering birds. It supports a nationally important breeding colony of Common Tern Sterna hirundo. It also has large numbers of Black-headed Gull Chroicocephalus ridibundus, Cormorant Phalacrocorax carbo, Great Crested Grebe Podiceps cristatus and Tufted Duck Aythya fuligula in the breeding season. In winter, the lake is important for range of waterfowl species, with nationally important populations of Tufted Duck, Goldeneye Bucephala clangula and Mute Swan Cygnus olor, along with Whooper Swan Cygnus cygnus (NPWS, 2004). The lough has also traditionally been used by a relatively small flock of Greenland White-fronted Goose Anser albifrons flavirostris, in the Lough Derg-Lough Graney area, where they feed on grassy islands; however the birds have been rarely seen over recent years (NPWS, 2014f).
4.5.1 Special Conservation Interests Table 4-4: Special Conservation Interests of Lough Derg (Shannon) SPA (004058) Code Qualifying Interests Attributes Tufted Duck Aythya A061 - Population trend fuligula - Distribution Goldeneye Bucephala A067 From: Inner Galway Bay SPA Conservation Objectives (NPWS, clangula 2013c) - Breeding population abundance: apparently occupied nests (AONs) Cormorant A017 Phalacrocorax carbo - Productivity rate - Distribution: breeding colonies
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Code Qualifying Interests Attributes - Prey biomass available - Barriers to connectivity - Disturbance at breeding site - Population trend - Distribution From: Inner Galway Bay SPA Conservation Objectives (NPWS, 2013c) - Breeding population abundance: apparently occupied nests (AONs) - Productivity rate: fledged young per breeding pair - Distribution: breeding colonies Common Tern Sterna A193 hirundo - Prey biomass available - Barriers to connectivity - Disturbance at breeding site From: Inner Galway Bay SPA Conservation Objectives (NPWS, 2013c) Wetlands and - Habitat area A999 Waterbirds From: Inner Galway Bay SPA Conservation Objectives (NPWS, 2013c)
4.5.2 Conservation Objectives The Conservation Objective for Lough Derg (Shannon) SPA is to maintain or restore the favourable conservation condition of the bird species listed as Special Conservation Interests for this SPA (see Table 4-4) (NPWS, 2011d). Section 4.2.2 above details the criteria used to assess favourable condition.
4.5.3 Site Vulnerabilities NPWS (2014f) identify that Lough Derg (Shannon) SPA is vulnerable to: Nutrient enrichment from the agricultural run-off and sewage. The introduction of Zebra Mussel Dreissena polymorpha threatens the ecology of some aquatic ecosystems within the lake (although this species may have ameliorated some of the previous eutrophication issues). Recreational activities which can cause disturbance to bird populations.
4.6 Slieve Aughty Mountains SPA (004168) This SPA is a very large site that extends from just south of Lough Rea in County Galway to Scariff in County Clare. Whilst the peaks of the mountain range are not particularly high or pronounced, the site does rise to a maximum of 378m near Cappaghabaun Mountain (NPWS, 2007). The site contains a range of wetland habitats, including many small- and medium-sized lakes (e.g. Lough Graney and Lough Atorick) and several important rivers (e.g. Owendalulleegh, Graney). The site also contains a number of upland habitats, although approximately half the site contains coniferous plantation. Almost one-third of the site is unplanted blanket bog, such as at Sonnagh, Loughatorick South and Glendree, and wet and dry heath (NPWS, 2007). The site is designated as an SPA due to its populations of Hen Harrier Circus cyaneus and Merlin Falco columbarius. It is a stronghold for Hen Harrier, supporting the largest concentration in the country, with 24 confirmed and three possible breeding pairs in 2005; this represents 17% of the national total. The site also supports a breeding population of Merlin Falco columbarius, with over five pairs likely (NPWS, 2007).
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4.6.1 Special Conservation Interests Table 4-5: Special Conservation Interests of Slieve Aughty Mountains SPA (004168) Code Qualifying Interests Attributes - Roost attendance: individual hen harriers - Suitable foraging habitat Hen Harrier Circus A082 - Roost site: condition cyaneus - Disturbance at roost site From: Wexford Harbour and Slobs SPA Conservation Objectives (NPWS, 2013e) There are no Site Specific Conservation Objectives for Merlin currently available, which could have been substituted As a result, the following attributes have been proposed based on those for Hen Harrier above: Merlin Falco A098 - Roost attendance: individual hen harriers columbarius - Suitable foraging habitat - Roost site: condition - Disturbance at roost site
4.6.2 Conservation Objectives The Conservation Objective for Slieve Aughty Mountains SPA is to maintain or restore the favourable conservation condition of the bird species listed as Special Conservation Interests for this SPA (see Table 4-5) (NPWS, 2011e). Section 4.2.2 above details the criteria used to assess favourable condition.
4.6.3 Site Vulnerabilities NPWS (2014g) identify that Slieve Aughty Mountains SPA is vulnerable to: Unsustainable afforestation which would reduce or fragment the area of foraging habitat, resulting in possible reduction in breeding density and productivity.
4.7 Description of the receiving environment - Ecological Walkover Survey Results
4.7.1 Introduction To further inform the Appropriate Assessment process, the OPW selected a number of channels within the Killimor Arterial Drainage Scheme for assessment through the undertaking of an ecological walkover survey. The selected channels are those located in, or within 100m of, a Natura 2000 site. This section summarises the methodology and findings of these surveys. All data collected on site has been inputted into a GIS system and provided to OPW to enhance understanding of the baseline environment and inform future works.
4.7.2 Methodology The ecological walkover survey consisted of: Mapping and recording of habitats along the channels/embankments in accordance with the Fossitt Guidelines (2010). As part of the habitat mapping, the location and extent of all Annex I habitats was also noted and mapped. Any other habitat features that contributed to habitat diversity, including any spoil heaps, small wetland areas or linear features with high species-richness, but that were not sufficient to warrant a separate classification as part of the habitat mapping exercise, were identified and noted.
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The location of any areas of floating river vegetation were recorded, with notes made on abundance and species composition. Recording the presence of any non-native invasive species. Recording the presence and location of all Annexed species, species protected under the Wildlife Acts and Flora Protection Order, and any other notable floral or faunal species. Specifically, this included: Recording of evidence of Otters (e.g. spraints, holts, couches, feeding remains, footprints) Recording of evidence of Badger activity (e.g. setts, latrines, footprints, runs, feeding signs or hairs) All bird activity observed during the survey was recorded, including species listed in Annex I of the Birds Directive and Birds of Conservation Concern in Ireland (BoCCI). The locations of Kingfisher nests, Sand Martin nesting cliffs, or eroded sections of vertical bank providing suitable nest sites was also noted and mapped. Habitats where rare or protected animal or plant species are present, or where the habitats are suitable to support these species were also recorded.
The results of all of the above surveys have been compiled into a GIS geodatabase, which includes three layers: Habitats classified according to the Fossitt Guidelines Areas of Annex I habitats and other notable habitat areas not sufficient to warrant classification under the Fossitt system The location of any species information (i.e. evidence of protected species, stands on non- native invasive species).
A geo-referenced photographic record has also been compiled during the ecological survey, which consists of: Habitats present along the surveyed watercourses and embankments (where habitat type is continuous along a channel, a minimum of one photograph for each kilometre stretch of channel corridor will be taken) Notable areas, such as ecologically valuable habitats and other ecological sensitivities Bridges encountered during the survey work
4.7.3 Results
Habitats Watercourses within the Killimor Arterial Scheme area range from eroding/upland rivers (FW1), depositing/lowland rivers (FW2) including the Cappagh River, along with a number of drainage ditches (FW4). Along the marginal areas of, in particular, the depositing/lowland rivers, fringing vegetation (FS1) often with Reed Canary-grass Phalaris arundinacea, Common Club-rush Schoenoplectus lacustris and Iris Iris pseudacorus is present, with Yellow Water-lily Nuphar lutea along the water edge. Large proportions of the surveyed area are dominated by improved agricultural grassland (GA1), particularly along the eastern portion of channel C2/2. Some areas this improved grassland type contain scattered scrub and some are quite rank in nature. Grassland types of higher species- richness, both dry calcareous and neutral (GS1) and wet grassland (GS4), were noted in along watercourses throughout the surveyed sections. Wet grassland is particularly frequent in the Derrygarriff area (channels C2/10/1 and C2/10/1/1) and it is the dominant habitat type around Silverstream (westerly section of channel C2/2). Plantation woodland, both coniferous (WD4) and (mixed) conifer (WD3), is present in substantial areas of the surveyed sections, particularly around Lisheenaleen (channel C2/17/1), Inchy (channel C2/10) and Derrygarriff (channels C2/10/1 and C2/10/1/1). Broadleaved woodland types with some conifer component (WD1 and WD2) are also frequent and scattered throughout the surveyed sections. Some areas of more notable, species-rich woodland types are also present, including wet pedunculate oak-ash woodland (WN4) along channel C2/10 and small pockets of 2014s1164 Killimor Natura Impact Statement v2.4 23
wet willow-alder-ash woodland (WN6). Scrub (WS1) is also an abundant habitat type within the surveyed sections, often alongside watercourses. The scrub habitats in places were dominated by Gorse Ulex europaeus, with a number of the spoil heaps located alongside the scheme watercourses containing gorse-dominated scrub. Around Barroughter Bog (channels C1, C1/1 and C1/1/1) cutover bog habitat dominates, with Purple Moor-grass Molinia caerulea and Common Cotton-grass Eriophorum angustifolium abundant, with Meadow Thistle Cirsium dissectum, Marsh Arrowgrasss Triglohin palustre, Lousewort Pedicularis sylvatica frequent and wetter patches with Bogbean Menyanthes trifoliata, sedges Carex spp., and Black Bog-rush Schoenus nigricans. A sample of the habitat data collected during the ecological walkover survey is provided below in Figure 4-1
Figure 4-1: Sample Habitat Map
Annex I Habitat Mapping and Floating River Vegetation As part of the habitat mapping process, those habitats considered to represent habitat types listed on Annex I of the Habitats Directive were also noted. Information on those habitat areas that have been identified as representing Annex I habitats is detailed within the provided GIS shapefiles, however, a summary of the Annex I habitats found and their location is detailed below. Table 4-1: Annex I Habitats within Killimor Arterial Drainage Scheme Annex I Habitat Equivalent Location Found in Description (From: NPWS, 2014h and JNCC, 2014) Type Fossitt Habitats Killimor Scheme In Ireland there are 3 distinct communities that can be Hydrophilous tall considered as this habitat type: herb fringe 1. In lowland areas it occurs as a community of Along the marginal communities of watercourses, particularly along the unmanaged edges of FS2 Tall-herb areas of the plains and of the slow-moving rivers and on the margins of lakes. Here it is swamps Cappagh River montane to dominated by tall wetland herbs such as Angelica Angelica GM1 Marsh (Channel C1) alpine levels sylvestris, Meadowsweet Filipendula ulmaria, Yellow Iris [6430] Iris pseudacorus, Purple Loosestrife Lythrum salicaria, Common Valerian Valeriana officinalis and Horsetails 2014s1164 Killimor Natura Impact Statement v2.4 24
Annex I Habitat Equivalent Location Found in Description (From: NPWS, 2014h and JNCC, 2014) Type Fossitt Habitats Killimor Scheme Equisetum fluviatile and E. palustre. 2. In upland areas it occurs as a community of ungrazed or lightly grazed cliff edges, on calcareous cliffs or wet siliceous screes with some base-enrichment of the water. These patches are typically small, with species such as Lady's Mantle Alchemilla spp., Angelica, Meadowsweet, Marsh Hawksbeard Crepis paludosa, Water Avens Geum rivale and Lesser Meadow-rue Thalictrum minus. 3. In the lowlands this habitat may also occur as a nitrophilous tall herb community of woodland borders. Typical species may include Garlic Mustard Alliaria petiolata, Cow Parsley Anthriscus sylvestris, Hemp Agrimony Eupatorium cannabinum, Herb Robert Geranium robertianum, Wood Avens Geum urbanum and Butterbur Petasites hybridus. This habitat type in Ireland is represented by both fen and grassland communities on nutrient poor soils, often with fluctuating water tables. It is either managed as traditional hay meadows (i.e. cut only once a year in later Molinia summer/autumn with the hay crop removed) or more meadows on usually by extensive pasture. In Ireland they occur in calcareous, lowland plains on neutral to calcareous gleys, or on peaty Areas to the north of peaty or clayey- soils in both the uplands and lowlands. They generally GS4 Wet Barroughter Bog silt-laden soils have a north-western distribution. grassland SAC (Channel C1/1) (Molinion It often occurs as a component of wet pastures or fens, caeruleae) and frequently in mosaics with dry grassland, heath, mire [6410] or scrub communities. Purple Moor-grass Molinia caerulea occurs with a wide range of associated species, including rushes, sedges and tall growing herbs Meadow Thistle Cirsium dissectum is one of the key indicator species for this habitat Degraded raised bogs occur where there has been widespread disruption, usually by anthropogenic sources, to the structure and function of the peat body. This typically involves changes to the hydrology, vegetation and physical structure of the bog, leading to desiccation, oxidation and loss of species or changes in the balance of the species composition. As a result, peat is not currently forming in these degraded habitats. Degraded raised The vegetation of degraded bog contains several, but not Areas in and to the bogs still all of the species typical of active raised bogs, but the north and east of capable of relative abundance and distribution of the individual PB4 Cutover bog Barroughter Bog natural species varies. SAC (Channels C1, regeneration To classify as this Annex I habitat, the degraded raised C1/1 and C1/1/1) [7120] bogs must be capable of natural regeneration, through repair to hydrological functioning and appropriate management. Land cover types such as conifer plantations, improved pasture, scrub woodland bare peat and impoverish vegetation dominated by Purple Moor- grass Molinia caerulea, Hare's-tail Cotton-grass Eriophorum vaginatum and Heather Calluna vulgaris, but lacking significant cover of Bog Mosses Sphagnum spp. In Ireland this habitat consists of open vegetation on peat which is characterised by an abundance of White or Brown Within small pockets Beak-sedge Rhynchospora alba or R. fusca. It can occur in within degraded Depressions on both active and degraded blanket bogs and in raised bogs raised bog areas in peat substrates on wet peat substrates on the margins or pools and PB1 Raised bog and to the north and of the hollows. It can also occur as a pioneer community in areas PB4 Cutover bog east of Barroughter Rhynchosporion of disturbed peat, such as peat cuttings. It is typically a Bog SAC (Channels [7150] lowland community. C1, C1/1 and Other species typically present include, Sphagnum spp., C1/1/1) Sundews Drosera spp. Bogbean Menyanthes trifoliata and Cotton-grass Eriophorum angustifolium.
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Floating River Vegetation The Annex I habitat of watercourses of plain to montane levels with the Ranunculion fluitantis and Callitricho-Batrachion vegetation [3260] under the Habitats Directive is very broad, especially when the presence of aquatic mosses is considered; using this broad definition the 'Floating River Vegetation' habitat type will be found in most watercourses in Ireland (NPWS, 2014h). They are typically watercourses characterised by the abundance of water-crowfoots Ranunculus spp., subgenus Batrachium (i.e. Ranunculus fluitans, R. penicillatus ssp. penicillatus, R. penicillatus ssp. pseudofluitans, and R. peltatus and its hybrids), which form floating mats. However, there is no satisfactory definition of this habitat type and its sub-types and its distribution in Ireland. It can occur over a wide range of physical conditions from acid, oligotrophic, flashy upland streams dominated by bryophytes to more eutrophic, slow flowing streams dominated by Ranunculus and water-starwort Callitriche species. The Ranunculus species can be associated with a wide assemblage of other aquatic plants, such as Water-cress Rorippa nasturtium-aquaticum, water- starworts Callitriche spp., water-parsnips Sium latifolium and Berula erecta, water-milfoils Myriophyllum spp. and Water Forget-me-not Myosotis scorpioides. In some rivers, the cover of these species may exceed that of Ranunculus species (NPWS, 2014h). Other associated species with this habitat type can include Horned Pondweed Zannichellia palustris, pondweed species Potamogeton spp. and the moss Fontinalis antipyretica. Opposite-leaved Pondweed Groelandia densa may also be present, with Flowering Rush Butomus umbellatus potentially present as part of the bank flora (OPW, 2007). Within the watercourses surveyed within the Killimor Arterial Drainage Scheme, none were identified as supporting vegetation communities representative of the Annex I Floating River Vegetation habitat type. However, a number of the watercourses were identified as containing diverse and species-rich aquatic macrophyte flora and these have been Target Noted within the GIS shapefiles provided. These notable watercourses include: C1/1 C1/1/1 These watercourses were deemed not to represent the Annex I habitat type for a number of reasons, including the species composition (i.e. there was a lack of Ranunculus species or other frequently associated species) and watercourses typology (i.e. being a man-made ditch system rather than a more natural riverine channel).
Non-native Invasive Species Few non-native invasive species were recorded during the survey. One stand of Japanese Knotweed Fallopia japonica was recorded on the roadside adjacent to channel C2/2 (access to the watercourse for maintenance may be required in this area) and Canadian Waterweed Elodea canadensis was recorded in watercourses C1/1 and D1.
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Figure 4-2: Japanese Knotweed near Channel C2/2
Protected Flora and Fauna Protected fauna recorded during ecological walkover surveys included: Otter Lutra lutra Common Frog Rana temporaria Roe Deer Capreolus capreolus
Figure 4-3: Roe Deer sighted adjacent to Channel C2/10/1 and Otter holt recorded on Channel C2/2
Specific details on these protected species records are provided within the GIS database. A number of features with the potential to support roosting bats were also noted. A Fox Vulpes vulpes was also sighted adjacent to channel C2/10/1.
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Figure 4-4: Fox sighted adjacent to Channel C2/10/1 No plant species listed on the Flora (Protection) Order 1999 were recorded during the survey. However, Blue-eyed Grass Sisyrinchium bermudiana, a relatively scarce species restricted to the west of Ireland, was noted in a wet grassland and cutover raised bog habitats in a number of locations.
Figure 4-5: Blue-eyed Grass adjacent to channel C1/1
Bird Activity The bird species recorded during the ecological surveys conducted in the Killimor Arterial Drainage Scheme are detailed below. A number of locations also provided earth embankments with suitability for nesting by Kingfisher Alcedo atthis or Sand Martin Riparia riparia; these are detailed as target notes within the provided GIS shapefiles. Table 4-2: Bird Species Recorded in Killimor Arterial Drainage Scheme Common Name Latin Name Comment on Location Recorded Chroicocephalus Black-headed Gull Cappagh River area ridibundus Blackbird Turdus merula Common throughout all surveyed reaches Blue Tit Cyanistes Channel C2/17/1 and Moyglass area (Channel C2/2) 2014s1164 Killimor Natura Impact Statement v2.4 28
Common Name Latin Name Comment on Location Recorded caeruleus Chaffinch Fringilla coelebs Common throughout all surveyed reaches Phylloscopus Woodford River, Channel C2/17/1 and Duniry River Chiffchaff collybita areas Coal Tit Periparus ater Channel C2/2 Phalacrocorax Cormorant Cappagh River area carbo Crow Corvus corone Woodford River area Dipper Cinclus cinclus Woodford River area Dunnock Prunella modularis Moyglass area (Channel C2/2) Grey Wagtail Motacilla cinerea Woodford River area Kingfisher Alcedo atthis Duniry River area Magpie Pica pica Moyglass area (Channel C2/2) Anas Mallard Frequent throughout all surveyed reaches platyrhynchos Meadow Pipit Anthus pratensis Moyglass area (Channel C2/2) Gallinula Moorhen Duniry River area chloropus Phasianus Pheasant Cappagh River area colchicus Pied Wagtail Motacilla alba Woodford River area Sand Martin Riparia riparia Woodford River area Woodford River area and Moyglass area (Channel Song Thrush Turdus philomelos C2/2) Starling Sturnus vulgaris Woodford River area Swallow Hirundo rustica Frequent throughout all surveyed reaches Swift Apus apus Woodford River and Duniry River areas Treecreeper Certhia familiaris Duniry River area Tree Pipit Anthus trivialis Moyglass area (Channel C2/2) Columba Woodpigeon Common throughout all surveyed reaches palumbus Troglodytes Wren Cappagh River and Duniry River areas troglodytes Yellow Wagtail Motacilla flava Duniry River and Channel C2/2 area
4.8 Consultation Responses The table below summarises the responses provided during the consultation phase undertaken as part of this project. Where relevant, this information has been used to inform the Appropriate Assessment detailed in section 5.3. No response was received from NPWS. Table 4-3: Consultation Responses Consultee Information provided Graphical data provided from a fish survey conducted on the Cappagh River system in 2009. Key points from this data include: - The system throughout is important for Trout, with relatively significant populations of Salmon at some survey points. - The upper sections of the Cappagh system are dominated by Stickleback. IFI - Coarse fish, including Roach, Perch and Pike are more frequent in the
downstream sections of the system. - Lamprey (River/Brook) were recorded at a small number of survey points. Graphical data provided from a fish survey conducted in the Killimor Scheme (the Killcrow catchment) from 2010 system. Key points from this data include:
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Consultee Information provided - Minnow and 3-spined Stickleback dominate the fish population throughout, with Stickleback more dominant in upstream areas and Minnow more dominant in downstream areas. - Coarse fish species including Perch, Gudgeon and Roach are present in downstream areas. - Trout is present at some survey points within the Killcrow system, but not as a significant proportion of the fish population. - No Salmon or Lamprey were recorded in the Killcrow system. Graphical data provided from a crayfish presence/absence survey of areas within the Killimor Scheme (the Killcrow catchment) from 2010 highlighted the presence of this species on a number of OPW channels. Graphical data provided from a lamprey presence/absence survey of areas within the Killimor Scheme (the Killcrow catchment) from 2010 highlighted the presence of this species on a small number of OPW channels. Graphical data provided from a salmon presence/absence survey of areas within the Killimor Scheme (the Killcrow catchment) from 2010 highlighted the presence of this species at one location on the Killcrow River, near Gortanummena. Graphical data provided from a trout presence/absence survey of areas within the Killimor Scheme (the Killcrow catchment) from 2010 highlighted the presence of this species throughout the system.
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5 Appropriate Assessment
5.1 Introduction The following chapter assesses the proposed drainage maintenance activities on those channels and embankments screened into the assessment (see section 3) in relation to the Natura 2000 sites detailed in Section 4.
5.2 Identification of Potential Sources of Impact This section further examines the source > pathway > receptor chains that could potentially result in adverse impacts arising on the screened in Natura 2000 sites in the Killimor Arterial Drainage Scheme; this is informed primarily by Ryan Hanley (2014c). Table 3-1 details which of the possible pathways of impact (i.e. surface water, land and air, or groundwater) have been identified as potentially affecting each of the screened in Natura 2000 sites. Figure 3-4 illustrates which of the channels, embankments and structures within the Killimor Arterial Drainage Scheme are those which could potentially impact upon the identified Natura 2000 sites and are consequently screened into the assessment; all other channels, embankments and structures within the Killimor Arterial Drainage Scheme have been screened out of the assessment.
5.2.1 Potential Sources of Impact via Surface Water Pathways Two Natura 2000 sites were identified as potentially being impacted upon via surface water pathways; Lough Derg, North-East Shore SAC and Lough Derg (Shannon) SPA. All the waterbirds of special conservation interests in Lough Derg (Shannon) SPA were identified as potentially at risk via surface water pathways. However, in the Lough Derg, North-East Shore SAC only the surface water dependent habitats for which the site is designated (i.e. Calcareous fens with Cladium mariscus and species of the Caricion davallianae [7210], Alkaline fens [7230] and Alluvial forests with Alnus glutinosa and Fraxinus excelsior (Alno-Padion, Alnion incanae, Salicion albae) [91E0]) were identified as being at risk via surface water pathways. The following sources of impact are identified as potentially impacting upon the above Natura 2000 sites through surface water pathways: Release of suspended solids - this can arise from a variety of drainage maintenance activities, including removal of in-stream silt and vegetation, aquatic vegetation cutting, bank protection works and bush cutting, branch trimming and tree cutting. It can impact on surface water dependent habitats indirectly through increased turbidity, which can reduce photosynthesis levels. It can also impact indirectly on waterbirds of special conservation interest by affecting food chains from reduced water clarity and reduced photosynthesis which can affect aquatic invertebrate diversity (i.e. the food source of the waterbirds). Release or changes in nutrient levels - this can arise from a variety of drainage maintenance activities, including removal of in-stream silt and vegetation, aquatic vegetation cutting, bank protection works and bush cutting, branch trimming and tree cutting. It can impact on surface water dependent habitats indirectly through causing eutrophication. It can also impact indirectly on waterbirds of special conservation interest by affecting food chains through increased algal growth and decreased invertebrate and algal diversity (i.e. the food source of the waterbirds) Changes in water levels/channel morphology - this can arise from a variety of drainage maintenance activities, including removal of in-stream silt and vegetation, aquatic vegetation cutting, bank protection works and bush cutting, branch trimming and tree cutting. It can occur from maintenance activities that deepen and wide the channel back to the original design level. This can impact on surface water dependent habitats indirectly through increased capacity and flow in the channel leading to hydrological impacts. It can also impact on waterbirds of special conservation interest through causing a loss of suitable habitat and impacting upon food chains.
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Table 5-1: Potential Sources of Impact via Surface Water Pathways
Potential Sources Vulnerable Applicable OPW Channels/Embankments of Impact Natura 2000 Site Channel Embankment C1 C2/2/2 C1/2 C2/2/2/1 C1/2/1 C2/2/3 C1/3 C2/3 C1/4 D1 C1/5 D1/1 Lough Derg, C1/6 D1/2 E1 North-East Shore C1/7 D1/2/1 E2 SAC C1/8 D2 C1/11 D2/1 Release of C2 D2/1/1 suspended solids C2/1 E.D.Kileen Y C2/2 ED Kileen Y Release or changes C2/2/1 E.D.Kileen X in nutrient levels C2/2/1/1 E.D.Coolfin C1 C2/2/2 Changes in water C1/2 C2/2/2/1 levels/channel C1/2/1 C2/2/3 morphology C1/3 C2/3 C1/4 D1 C1/5 D1/1 C1/6 D1/2 Lough Derg E1 C1/7 D1/2/1 (Shannon) SPA E2 C1/8 D2 C1/11 D2/1 C2 D2/1/1 C2/1 E.D.Kileen Y C2/2 ED Kileen Y C2/2/1 E.D.Kileen X C2/2/1/1 E.D.Coolfin
Works on bridges and sluices located on the above channels and embankments are similarly considered to result in potential adverse effects.
5.2.2 Potential Sources of Impact via Land and Air Pathways Four Natura 2000 sites were identified as potentially being impacted upon via land and air pathways; Barroughter Bog SAC, Lough Derg, North-East Shore SAC, Lough Derg (Shannon) SPA and Slieve Aughty Mountains SPA. All qualifying interests/special conservation interests on all four sites were identified as potentially being at risk from sources of impact via land and air pathways. The following sources of impact are identified as potentially impacting upon the above Natura 2000 sites through land and air pathways: Physical disturbance of habitats (and loss of wood vegetation cover) - this can arise from a variety of drainage maintenance activities, including removal of in-stream silt and vegetation, aquatic vegetation cutting, bank protection works and bush cutting, branch trimming and tree cutting. It can impact on habitats (terrestrial, surface water dependent and groundwater dependent) directly, although temporarily, as a result of machines tracking along the bankside and as a result of the deposition of spoil on the bankside. This can result in a loss of habitat from in-stream/bankside areas and maintenance access corridors, direct mortalities or the displacement of sensitive species. It can also impact on waterbirds of special conservation interest through machines tracking along the banskide, reducing vegetation as a food source. No pathway exists for this source of impact to affect terrestrial raptors of special conservation interest, and therefore this source of impact is not applicable to the Slieve Aughty Mountains SPA. Noise and visual disturbance - this can arise from a variety of drainage maintenance activities, including removal of in-stream silt and vegetation, aquatic vegetation cutting, bank protection works and bush cutting, branch trimming, tree cutting and other activities such as gravel removal. It can occur as a result of noise emissions and visual disturbance 2014s1164 Killimor Natura Impact Statement v2.4 32
from machinery and the presence of machine drivers and other OPW staff. It can result in the flight and displacement of sensitive species from suitable habitat locations. It is not considered relevant in relation to designated habitat types, although it is relevant for the species which these habitats support. Table 5-2: Potential Sources of Impact via Land and Air Pathways Applicable OPW Channels/ Potential Sources of Vulnerable Natura 2000 Site Embankments Impact Channel Embankment C1 C2 D1 D1/1 E1 Barroughter Bog SAC D1/2 Physical disturbance of E2 habitats (and loss of D1/2/1 D2 wood vegetation cover) D2/1 D2/1/1 C1 Lough Derg, North-East Shore E1 D1 SAC E2 D1/1 C1 E1 Lough Derg (Shannon) SPA D1 E2 D1/1 C2 C2/2 Physical disturbance of C2/2/2 habitats (and loss of C2/2/4 wood vegetation cover) C2/2/5 Noise and visual C2/10 Slieve Aughty Bog SPA C2/10/1 N/A disturbance C2/10/1/1 C2/14 C2/14/X2 C2/17/1 E.D.Coolfin E.D.Coolfin Trib
Works on bridges and sluices located on the above channels and embankments are similarly considered to result in potential adverse effects.
5.2.3 Potential Sources of Impact via Groundwater Pathways Four Natura 2000 sites were identified as potentially being impacted upon via grounwdwater pathways; Ardgraigue Bog SAC, Barroughter Bog SAC, Lough Derg, North-East Shore SAC and Lough Derg (Shannon) SPA. All qualifying interests/special conservation interests in Ardgraigue Bog SAC and Lough Derg (Shannon) SPA were identified as potentially being at risk from sources of impact via groundwater pathways. In Barroughter Bog SAC only the Active raised bog [7110] and Degraded raised bog habtiats still capable of natural regeneration [7120] were identified as being at risk from groundwater pathways; Depressions on peat substrates of the Rhynchosporion [7150] were identified as not at risk due to their topographic situation in relation to Arterial Drainage schemes watercourses. In Lough Derg, North-East Shore SAC only the groundwater dependent habitats for which the site is designated (i.e. Calcareous fens with Cladium mariscus and species of the Caricion davallianae [7210], Alkaline fens [7230] and Alluvial forests with Alnus glutinosa and Fraxinus excelsior (Alno-Padion, Alnion incanae, Salicion albae) [91E0]) were identified as being at risk via groundwater pathways. The following sources of impact are identified as potentially impacting upon the above Natura 2000 sites through groundwater pathways: Release of suspended solids - this can arise from a variety of drainage maintenance activities, including removal of in-stream silt and vegetation, aquatic vegetation cutting, bank protection works and bush cutting, branch trimming and tree cutting. It can impact on groundwater dependent habitats indirectly through increased turbidity, which can 2014s1164 Killimor Natura Impact Statement v2.4 33
reduce photosynthesis levels. It can also impact indirectly on waterbirds of special conservation interest by affecting food chains from reduced water clarity and reduced photosynthesis which can affect aquatic invertebrate diversity (i.e. the food source of the waterbirds). Release or changes in nutrient levels - this can arise from a variety of drainage maintenance activities, including removal of in-stream silt and vegetation, aquatic vegetation cutting, bank protection works and bush cutting, branch trimming and tree cutting. It can impact on groundwater dependent habitats indirectly through causing eutrophication (from mobile inorganics N03 and low mobility inorganics P04), which could impact on groundwater from aquifer recharge. It could also impact indirectly on waterbirds of special conservation interest by affecting food chains through increased algal growth and decreased invertebrate and algal diversity (i.e. the food source of the waterbirds) Changes in water levels/channel morphology - this can arise from a variety of drainage maintenance activities, including removal of in-stream silt and vegetation, aquatic vegetation cutting, bank protection works and bush cutting, branch trimming and tree cutting. It can also occur from maintenance activities that deepen and wide the channel back to the original design level. This can impact on groundwater dependent habitats indirectly through: o Increased capacity and flow in the channel leading to a reduction in water levels and hydrogeological impacts. o Direct aquifer recharge from a stream bed in karst/fissured aquifer. o Lowering of channel water levels due to increased channel conveyance, which can increase the hydraulic gradient between the bankside unconfined groundwater table. This can potentially increase discharge to the channel and change the absolute value and pattern of variation in groundwater levels and potentially the location of groundwater divides. The distance from the channel at which an impact occurs is dependent on the subsoil and bedrock aquifer characteristics. It can also impact on waterbirds of special conservation interest through causing a loss of suitable habitat and impacting upon food chains. Table 5-3: Potential Sources of Impact via Groundwater Pathways Applicable OPW Potential Sources of Vulnerable Natura 2000 Site Channels/Embankments Impact Channel Embankment C1/16/2/1 C1/23 C1/23/1 C1/23/2 Ardgraigue Bog SAC C1/23/2/1 E1 C1/23/2/2 E2 C1/25/2 C1/25/4 Release of suspended C1/25/4/1 C85/470/269 solids C1 Release or changes in C2 nutrient levels C2/1 D1 Changes in water Barroughter Bog SAC D1/1 E1 levels/channel D1/2 E2 morphology D1/2/1 D2 D2/1 D2/1/1 C1 C2 Lough Derg, North-East D1 E1 Shore SAC D1/1 E2 D1/2 D1/2/1
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Applicable OPW Potential Sources of Vulnerable Natura 2000 Site Channels/Embankments Impact Channel Embankment D2/1 C1 C2 Lough Derg(Shannon) SPA D1 E1 D1/1 E2 D1/2 D1/2/1
Works on bridges and sluices located on the above channels and embankments are similarly considered to result in potential adverse effects.
5.3 Impact Assessment Table 5-4 assesses each of the screened in Natura 2000 sites in more detail and examines where potentially adverse impacts may arise from the sources of impact identified above. Where potentially significant adverse impacts are identified, avoidance and mitigation measures are proposed to offset these impacts.
5.3.1 In-combination Effects Appropriate Assessment requires consideration of the impacts on Natura 2000 sites of drainage maintenance activities in the Killimor Arterial Drainage Scheme, in-combination with other plans or projects. Potential sources of in-combination effects identified as part of this assessment include: Undertaking of general agricultural operations by farmers and landowners in areas adjacent to scheme watercourses and embankments which could potentially give rise to impacts of a similar nature to those arising from Arterial Drainage Maintenance operations. This could potentially result in additional periods of disturbance (physical, noise and visual). However, given that agricultural operations, similarly to drainage maintenance operations, are periodic and not continuous and have been ongoing for many decades, resulting in a background level of habituation, the in-combination effects of drainage maintenance and agricultural operations is not likely to be significant. OPW arterial drainage maintenance operations have been ongoing since the construction of the schemes following the 1945 Arterial Drainage Act, potentially resulting in adverse cumulative effects. However, as the maintenance operations are undertaken to restore the design level only, the hydrological impact will be no greater than originally occurred upon the schemes construction; no further deepening or widening will occur. On a regional scale, neighbouring Arterial Drainage Schemes could be considered to have an adverse impact on Natura 2000 sites, particularly where large sites fall across two, or more scheme areas. However, this is not considered to be a significant issue within Killimor Arterial Drainage Scheme as only the Carrigahorig Arterial Drainage Scheme could potentially impact on Natura 2000 sites that can also be impacted upon by the Killimor scheme (i.e. Lough Derg, North-East Shore SAC and Lough Derg (Shannon) SPA). As these are large sites and given that the drainage maintenance activities in both schemes are over 9km away, no significant adverse impacts are predicted.
There are no other known plans/projects on-going or proposed (at the time of this study) which may give rise to any form of cumulative impact on the Natura 2000 sites.
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Table 5-4: Impact Prediction Qualifying Interests/ Potential Site Name Impact on Attribute and Target Prior to Mitigation Avoidance / Residual Special Conservation Source of Pathway (site code) / Avoidance1 Mitigation Measures Impact Interests Impact Raised bogs (both active and degraded), and their associated habitats are groundwater dependent and have developed in response to specific water quality attributes. Follow protocols and Drainage maintenance activities could impact on water SOPs in OPW (2011b) - Release of quality in the raised bog habitats through the release of specifically points 2.1, suspended Groundwater suspended sediments and nutrients which could 2.2, 3.1 and 3.2 of solids potentially result in increased turbidity and eutrophication, Environmental which could then result in algal blooms. This could reach Drainage Maintenance these GWD habitats through aquifer recharge via Guidance SOP groundwater pathways. This could then impact on habitat
area and vegetation composition, preventing achievement See Table 6-1 of the targets associated with these attributes. However, Active raised bogs Kilroy et al. (2008) identifies that active raised bog No [7110] The above measures habitats have a low sensitivity to changes in groundwater will control sediment nutrient concentration and chemistry and therefore the Degraded raised bogs mobilisation and reduce Ardgraigue habitat types on this site will have some resilience to any still capable of natural the risk of pollution Bog SAC changes in groundwater quality. Furthermore, given that regeneration [7120] Release or incidents thereby (002356) all scheme watercourses are located outside of this SAC, changes in Groundwater reducing the potential and are downgradient of the bog habitats, the potential for Depressions on peat nutrient levels significance of this elevated levels of suspended solids and nutrients in substrates of the source of impact on the groundwaters to impact on these Annex I habitats is Rhynchosporion [7150] groundwater dependent minimal as movement of potentially habitats within this SAC contaminated/enriched groundwaters will be downgradient and away from the groundwater dependent habitats within the site. The maintenance of an appropriate hydrological regime is Follow protocols and critical to the favourable conservation condition of raised SOPs in OPW (2011b) - Changes in bog habitats, and associated features. Drainage specifically points 2.1 water levels/ maintenance activities, such as silt and vegetation and 2.2 of Groundwater No channel management, or other activities such as gravel shoal Environmental morphology removal, can result in the deepening and widening of Drainage Maintenance channels which could impact on groundwater levels. This Guidance SOP could have adverse impacts on a number of attributes,
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Qualifying Interests/ Potential Site Name Impact on Attribute and Target Prior to Mitigation Avoidance / Residual Special Conservation Source of Pathway (site code) / Avoidance1 Mitigation Measures Impact Interests Impact including habitat area and vegetation composition. See Table 6-1 However, Kilroy et al. (2008) reports that active raised bog habitats have a low sensitivity to groundwater level This will ensure that changes and therefore the habitats present in this SAC drainage maintenance will have some resilience to this. Furthermore, significant works do not change changes to the hydrogeological regime are unlikely as the water levels/channel works will restore the system to the design standard only. morphology beyond the The drainage maintenance activities are therefore unlikely existing design level, to impact significantly on attributes used to define which has been in conservation status. existence since 1968 Follow protocols and SOPs in OPW (2011b) - Raised bogs (both active and degraded), and their specifically points 2.1, associated habitats are groundwater dependent and have 2.2, 3.1 and 3.2 of Release of developed in response to specific water quality attributes. Environmental suspended Groundwater Drainage maintenance activities could impact on water Drainage Maintenance solids quality in the raised bog habitats through the release of Guidance SOP suspended sediments and nutrients which could Active raised bogs potentially result in increased turbidity and eutrophication, [7110] See Table 6-1 Barroughter which could then result in algal blooms. This could reach
Bog SAC these GWD habitats through aquifer recharge via No Degraded raised bogs The above measures (000231) groundwater pathways. This could then impact on habitat still capable of natural will control sediment area and vegetation composition, preventing achievement regeneration [7120] mobilisation and reduce of the targets associated with these attributes. However, the risk of pollution Release or Kilroy et al. (2008) identifies that active raised bog incidents thereby changes in Groundwater habitats have a low sensitivity to changes in groundwater reducing the potential nutrient levels nutrient concentration and chemistry and therefore the significance of this habitat types on this site will have some resilience to any source of impact on the changes in groundwater quality. groundwater dependent habitats within this SAC
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Qualifying Interests/ Potential Site Name Impact on Attribute and Target Prior to Mitigation Avoidance / Residual Special Conservation Source of Pathway (site code) / Avoidance1 Mitigation Measures Impact Interests Impact The maintenance of an appropriate hydrological regime is critical to the favourable conservation condition of raised bog habitats, and associated features. Drainage maintenance activities, such as silt and vegetation Follow protocols and management, or other activities such as gravel shoal SOPs in OPW (2011b) - removal, can result in the deepening and widening of specifically points 2.1 channels which could impact on groundwater levels. This and 2.2 of could have adverse impacts on a number of attributes, Environmental including habitat area and vegetation composition. Drainage Maintenance However, Kilroy et al. (2008) reports that active raised Guidance SOP bog habitats have a low sensitivity to groundwater level Changes in changes and therefore the habitats present in this SAC water levels/ See Table 6-1 Groundwater will have some resilience to this. Furthermore, significant No channel changes to the hydrogeological regime are unlikely as the morphology This will ensure that works will restore the system to the design standard only. drainage maintenance The drainage maintenance activities are therefore unlikely works do not change to impact significantly on attributes used to define water levels/channel conservation status. In addition, as detailed in section 2.4, morphology beyond the no drainage maintenance activities will be conducted on existing design level, channels C1/1, C1/1/1 and the lower sections of channel which has been in C1, during the period 2015-2019 due to their location existence since 1968 within Barroughter Bog SAC; ensuring drainage maintenance work is not conducted in the site itself will help to maintain groundwater levels within the SAC boundaries to support the GWD habitats present. Active raised bogs These raised bog habitats are likely to be vulnerable to Follow protocols and [7110] physical disturbance arising from drainage maintenance SOPs in OPW (2011b) - Physical activities through the direct removal of vegetation within specifically point 1.1 Degraded raised bogs disturbance of the maintenance access corridor. This could impact on a and 1.2 of still capable of natural habitats (and range of attributes including habitat area and vegetation Environmental Land and Air No regeneration [7120] loss of wood structure and composition. The ecological walkover Drainage Maintenance vegetation survey (see Section 4.7) identified that degraded raised Guidance SOP to Depressions on peat cover) bog habitats, with depressions containing minimise the impacts of substrates of the Rhynchosporion vegetation (i.e. cutover bog PB4) were physical disturbance. Rhynchosporion [7150] present within close proximity to scheme watercourses
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Qualifying Interests/ Potential Site Name Impact on Attribute and Target Prior to Mitigation Avoidance / Residual Special Conservation Source of Pathway (site code) / Avoidance1 Mitigation Measures Impact Interests Impact C1, C1/1 and C1/1/1. However, as detailed in section 2.4 See Table 6-1 no drainage maintenance activities will be conducted on channels C1/1, C1/1/1 and the lower sections of channel C1, during the period 2015-2019 due to their location within Barroughter Bog SAC; consequently no adverse impacts from physical disturbance via land and air pathways can arise in relation to works on this watercourse. These terrestrial habitat types are likely to be vulnerable to physical disturbance arising from drainage Juniperus communis Follow protocols and maintenance activities through the direct removal of formations on heaths or SOPs in OPW (2011b) - vegetation within the maintenance access corridor. This calcareous grasslands specifically point 1.1 Physical could impact on a range of attributes including habitat [5130] and 1.2 of disturbance of area and vegetation structure and composition. However, Environmental habitats (and the ecological walkover survey did not identify any of Limestone pavements Land and Air Drainage Maintenance No loss of wood these Annex I habitat types within the surveyed sections [8240] Guidance SOP to vegetation of watercourse (see Section 4.7). The survey focussed on minimise the impacts of cover) scheme watercourses inside designated sites and within Taxus baccata woods physical disturbance. 100m of the boundary, therefore as these habitat types of the British Isles are not present within these areas no adverse impacts Lough Derg, [91J0] See Table 6-1 North-east from physical disturbance via land and air pathways can Shore SAC arise during drainage maintenance operations. Calcareous fens with Alkaline and calcareous fens require appropriate water Follow protocols and (002241) Cladium mariscus and quality to support the natural structure and functioning of SOPs in OPW (2011b) - species of the Caricion the habitat, generally receiving natural levels of nutrients specifically points 2.1, davallianae [7210] (i.e. iron, magnesium and calcium) from water sources, 2.2, 3.1 and 3.2 of Release of with generally low nitrogen and phosphorous which can Environmental suspended Surface Alkaline fens [7230] be limiting (NPWS, 2013b). Whilst the conservation status Drainage Maintenance solids Water of alluvial forests is not defined by specific water quality Guidance SOP No
Alluvial forests with attributes, they are dependent on an appropriate Groundwater Alnus glutinosa and hydrological regime as periodic flooding is essential to See Table 6-1 Fraxinus excelsior maintain this habitat type; flooding with contaminated or (Alno-Padion, Alnion Release or nutrient enriched water could impact on other attributes. The above measures incanae, Salicion albae) changes in Kilroy et al. (2008) reports that alluvial forests generally will control sediment [91E0] nutrient levels have a low-moderate sensitivity to changes in mobilisation and reduce
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Qualifying Interests/ Potential Site Name Impact on Attribute and Target Prior to Mitigation Avoidance / Residual Special Conservation Source of Pathway (site code) / Avoidance1 Mitigation Measures Impact Interests Impact groundwater nutrient concentration and chemistry, the risk of pollution whereas alkaline and calcareous fen habitats have a high incidents thereby sensitivity. Drainage maintenance activities could impact reducing the potential on water quality in these habitats, particularly the more significance of this sensitive fen habitats, through the release of suspended source of impact on the sediments and nutrients which could potentially result in groundwater dependent increased turbidity and eutrophication, which could then habitats within this SAC result in algal blooms. This could reach these habitat types through surface water pathways, or via groundwater pathways through aquifer recharge, and this could then impact on a number of attributes such as vegetation composition. Maintenance of appropriate hydrological regimes is a key attribute of these fen and woodland habitats. For example, alluvial forests require period flooding to Follow protocols and maintain the habitat along floodplains (NPWS, 2012d) SOPs in OPW (2011b) - and alkaline fens require natural groundwater levels, specifically points 2.1 surface water flows and water table levels to maintain this and 2.2 of habitat type, otherwise scrub and trees can invade as Environmental conditions become drier (NPWS, 2013b). Drainage Drainage Maintenance maintenance activities, such as silt and vegetation Guidance SOP management, or other activities such as gravel shoal Changes in Surface removal, can result in the deepening and widening of water levels/ Water See Table 6-1 channels which could impact on surface water flows and No channel water table levels. This could have adverse impacts on morphology Groundwater This will ensure that these habitats and a number of attributes, including drainage maintenance habitat area, habitat distribution and vegetation works do not change composition. This is likely to have a greater impact on the water levels/channel alkaline and calcareous fen habitats which are identified morphology beyond the as having a moderate-high sensitivity to changes in existing design level, groundwater levels, compared to the alluvial forest which has been in habitats which have a low-moderate sensitivity (Kilroy et existence since 1968 al. 2008). However, significant changes to the hydrological regime are unlikely as the works will restore the system to the design standard only. The drainage
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Qualifying Interests/ Potential Site Name Impact on Attribute and Target Prior to Mitigation Avoidance / Residual Special Conservation Source of Pathway (site code) / Avoidance1 Mitigation Measures Impact Interests Impact maintenance activities are therefore unlikely to impact significantly on attributes used to define conservation status. These wetland habitat types are likely to be vulnerable to physical disturbance arising from drainage maintenance activities through the direct removal of vegetation within Follow protocols and the maintenance access corridor. This could impact on a SOPs in OPW (2011b) - Physical range of attributes including habitat area and vegetation specifically point 1.1 of disturbance of structure and composition. However, the ecological Environmental habitats (and walkover survey did not identify any of these Annex I Drainage Maintenance Land and Air No loss of wood habitat types within the surveyed sections of watercourse Guidance SOP to vegetation (see Section 4.7). The survey focussed on scheme minimise the impacts of cover) watercourses inside designated sites and within 100m of physical disturbance. the boundary, therefore as these habitat types are not present within these areas no adverse impacts from See Table 6-1 physical disturbance via land and air pathways can arise during drainage maintenance operations. Follow protocols and SOPs in OPW (2011b) - Tufted Duck Aythya specifically points 2.1, fuligula [A061] Release of 2.2, 3.1 and 3.2 of suspended The wetland bird populations for which the SPA is Environmental Goldeneye Bucephala solids designated are supported by surface and groundwater Drainage Maintenance clangula [A067] dependent habitats. Drainage maintenance activities Guidance SOP Lough Derg could impact on these habitats through the release of Surface (Shannon) Cormorant nutrients and suspended solids. This could reach these Water See Table 6-1 SPA Phalacrocorax carbo habitats through surface water flow paths and aquifer No
[A017] recharge via groundwater pathways. This could then Groundwater The above measures (004058) impact upon the habitats and potentially the food supply will control sediment Common Tern Sterna Release or of these birds, through increased turbidity or mobilisation and reduce hirundo [A193] changes in eutrophication, potentially affecting the distribution of the risk of pollution nutrient levels species within the lough and long-term population trends. incidents thereby Wetlands and reducing the potential Waterbirds significance of this source of impact on the
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Qualifying Interests/ Potential Site Name Impact on Attribute and Target Prior to Mitigation Avoidance / Residual Special Conservation Source of Pathway (site code) / Avoidance1 Mitigation Measures Impact Interests Impact groundwater dependent habitats within this SAC Follow protocols and SOPs in OPW (2011b) - specifically points 2.1 and 2.2 of Environmental The wetland habitats around the lough that the wetland Drainage Maintenance bird special conservation interests depend on are surface Guidance SOP Changes in Surface water and groundwater dependent habitats. Changes in water levels/ Water water levels/channel morphology are not considered likely See Table 6-1 No channel to have an adverse impact on these habitats, and morphology Groundwater consequently the bird populations they support, via This will ensure that surface water or groundwater pathways as the works will drainage maintenance restore the system to the design standard only. works do not change water levels/channel morphology beyond the existing design level, which has been in existence since 1968 The wetland bird populations for which the SPA is designated were identified as being vulnerable to drainage maintenance activities via land and air Follow protocols and pathways. The habitats that support this species are likely SOPs in OPW (2011b) - to be vulnerable to physical disturbance arising from Physical specifically point 1.1 of drainage maintenance activities, such as vegetation disturbance of Environmental removal within the maintenance access corridor. habitats (and Drainage Maintenance Land and Air However, given that maintenance activities are conducted No loss of wood Guidance SOP to along watercourses that have been periodically subject to vegetation minimise the impacts of such activities, and that the bank of operation remains cover) physical disturbance. consistent, there will be a working corridor along the
channels which has been subject to periodic physical See Table 6-1 disturbance and consequently unlikely to provide high quality habitats which these bird species could use; as a result the impacts are likely to be minimised.
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Qualifying Interests/ Potential Site Name Impact on Attribute and Target Prior to Mitigation Avoidance / Residual Special Conservation Source of Pathway (site code) / Avoidance1 Mitigation Measures Impact Interests Impact Follow protocols and SOPs in OPW (2011b) - specifically points 1.1 and 1.2 of the Environmental The waterbird special conservation interests of this SPA Drainage Maintenance were identified as being vulnerable to drainage Guidance SOP Noise and maintenance activities via land and air pathways. The
visual Land and Air species within the SPA will be sensitive to disturbance No No works shall take disturbance from machinery and workforces conducting drainage place within 100m of maintenance operations, primarily during the important Lough Derg (Shannon) overwintering period. SPA during the overwintering period November to March
See Table 6-1 Follow protocols and SOPs in OPW (2011b) - specifically points 1.1 Hen Harrier Circus and 1.2 of the cyaneus [A082] Environmental The terrestrial raptor species for which this SPA is Slieve Drainage Maintenance designated were identified as being vulnerable to Aughty Guidance SOP Noise and drainage maintenance activities via land and air Mountains visual Land and Air pathways. The species within the SPA will be sensitive to No SPA No works shall take disturbance disturbance from machinery and workforces conducting place within 500m of drainage maintenance operations during the breeding (004168) Slieve Aughty season. Merlin Falco Mountains SPA during columbarius [A098] the nesting bird season (March - September).
See Table 6-1
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6 Avoidance and Mitigation Measures
6.1 Introduction The Environmental Management Protocols and SOPs developed by OPW (2011b) are routinely followed by OPW operational staff undertaking drainage maintenance works and help to provide a baseline level of environmental protection, with a specific focus on certain species (i.e. Brook, River and Sea Lamprey, White-clawed Crayfish, Otter, Freshwater Pearl Mussel, invasive species and Zebra Mussel). In addition to the measures contained within these documents OPW (2011b), Table 6-1 provides specific avoidance and mitigation measures that will be followed in order to offset the identified potential impacts on Natura 2000 sites. Table 6-1: Specific Mitigation Measures Applicable OPW Channels / Specific Avoidance and Mitigation Potential Impact Embankments1 Measures2 C1 C2/2 C1/2 C2/2/1 C1/2/1 C2/2/1/1 Refuelling will not be undertaken within Release of C1/3 C2/2/2 50m of a watercourse. C1/4 C2/2/2/1 suspended The release of suspended solids will be solids C1/5 C2/2/3 C1/6 C2/3 minimised during works. C1/7 C85/470/269 Where grouting is required on structures, C1/8 D1 C1/11 D1/1 prevent grout from entering the C1/16/2/1 D1/2 watercourse. C1/23 D1/2/1 Where parapet works are required, prevent C1/23/1 D2 old cured concrete waste from entering C1/23/2 D2/1 Release or C1/23/2/1 D2/1/1 watercourse. changes in C1/23/2/2 E.D.Kileen Y Suitable shuttering will be deployed in the nutrient levels C1/25/2 ED Kileen Y event of a concrete pour to ensure no C1/25/4 E.D.Kileen X C1/25/4/1 E.D.Coolfin concrete enters the watercourse. C2 E1 C2/1 E2 C1 C2/2 C1/2 C2/2/1 C1/2/1 C2/2/1/1 C1/3 C2/2/2 C1/4 C2/2/2/1 C1/5 C2/2/3 C1/6 C2/3 C1/7 C85/470/269 Works on all channels will be undertaken in Changes in C1/8 D1 accordance with the Scheme's design water levels/ C1/11 D1/1 standard, in order to prevent any new C1/16/2/1 D1/2 channel widening or deepening. morphology C1/23 D1/2/1 C1/23/1 D2 C1/23/2 D2/1 C1/23/2/1 D2/1/1 C1/23/2/2 E.D.Kileen Y C1/25/2 ED Kileen Y C1/25/4 E.D.Kileen X C1/25/4/1 E.D.Coolfin C2 E1 C2/1 E2 C1 D1 Physical C2 D1/1 disturbance of C2/2 D1/2 habitats (and C2/2/2 D1/2/1 Works and access will be restricted to the loss of wood C2/2/4 D2 existing maintenance access corridor. vegetation C2/2/5 D2/1 cover) C2/10 D2/1/1 C2/10/1 E.D.Coolfin C2/10/1/1 E.D.Coolfin 2014s1164 Killimor Natura Impact Statement v2.4 44
Applicable OPW Channels / Specific Avoidance and Mitigation Potential Impact Embankments1 Measures2 C2/14 Trib C2/14/X2 E1 C2/17/1 E2 C1 D1 C2 D1/1 C2/2 D1/2 C2/2/2 D1/2/1 C2/2/4 D2 C2/2/5 D2/1 Works and access will be restricted to the C2/10 D2/1/1 existing maintenance access corridor. C2/10/1 E.D.Coolfin C2/10/1/1 E.D.Coolfin C2/14 Trib Noise and C2/14/X2 E1 visual C2/17/1 E2 disturbance C2 C2/10/1/1 C2/2 C2/14 C2/2/2 C2/14/X2 No works shall take place within 500m of C2/2/4 C2/17/1 Slieve Aughty Mountains SPA during the C2/2/5 E.D.Coolfin nesting bird season (March - September). C2/10 E.D.Coolfin C2/10/1 Trib No works shall take place within 100m of C1 D1/1 Lough Derg (Shannon) SPA during the D1 overwintering period November to March.
1 Works on bridges and sluices located on the above channels and embankments are also subject to the detailed mitigation/avoidance measures. 2It should be noted that these avoidance and mitigation measures are required in addition to those standard practices detailed in the OPWs Environmental Management Protocols and Standard Operating Procedures (OPW, 2011).
6.2 Mitigation for Other Ecological Receptors The ecological walkover surveys (see Section 4.7) identified a number of other potential ecological constraints to arterial drainage maintenance works, for which Natura 2000 sites are not designated, which will be taken into account during maintenance operations. Table 6-2 details proposed mitigation measures to offset impacts on these identified receptors. Table 6-2: Specific Mitigation Measures for other Ecological Receptors Applicable Receptor OPW Channels Specific Avoidance and Mitigation Measures1 / Embankments Refuelling will not be undertaken within 50m of a watercourse.
Salmon and Avoid closed season for Salmonids (October-April) in Trout relation to in-stream silt and vegetation management on channels with salmonid spawning habitat. Where Salmonids are absent, undertake in-stream removal of silts and gravels in an upstream direction for All channels lamprey and crayfish. Where Salmonids are present, undertake in-stream removal of silts in a downstream direction allowing solids to settle out naturally and/or become trapped in vegetation. Lamprey species In relation to structural maintenance activities, spawning gravels located downstream of the structure will be tossed post completion of works to remove any silts present.
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Applicable Receptor OPW Channels Specific Avoidance and Mitigation Measures1 / Embankments Where works are required within 150m of a breeding Otter holt, a derogation license will be required from NPWS. Otter All channels In relation to non-breeding holts, no wheeled or tracked vehicles will be permitted within 20m of active holts or scrub clearance by hand within 15m. Where masonry bridges require maintenance, a bat roost potential assessment will be conducted in advance of works. Where bridges are identified as being of moderate or above suitability for roosting, Bats All masonry nocturnal activity surveys may then be required. bridges The bat survey and mitigation measures will be in full accordance with Bat Mitigation Guidelines for Ireland (Irish Wildlife Manual No. 25). While it will not possible to retain all overhanging branches and fallen trees with potential for perching sites for Kingfisher, as these may serve to block debris Kingfisher All channels and impede water flow, any branches located above flood level (defined by the trash line) will be retained to ensure perches are present along the channels for Kingfisher. For the protection of resident birds during the bird nesting season 1st March to the 31st August, the OPW Environmental Management Protocols and SOPs in relation to Birds will be deployed to protect riverbank vegetation and species during woody vegetation cutting. Nesting Birds All channels Prior to work on bridges the potential for nesting birds to be present will be taken into account. The incorporation of holes and ledges will be considered in the design of repairs and replacement structures as they can provide potential nesting habitat for bird species. A buffer of 30m in relation to the use of plant machinery will be deployed on Badger setts to allow for associated Fox and Badger All channels tunnels. Fox dens are often also used by badgers and the same standard will apply. Avoid undertaking work within stands of non-native invasive species. Invasive Species All channels Strictly adhere to OPW Invasive Species SOP.
1It should be noted that these avoidance and mitigation measures are required in addition to those standard practices detailed in the OPWs Environmental Management Protocols and Standard Operating Procedures (OPW, 2011).
6.3 Mitigation for Bridge/Structure Works As discussed in section 2.4 it is currently unknown where and when structural drainage maintenance operations will be required in relation to bridges. This Natura Impact Statement considers the potential impact of maintenance operations on bridges and other structures on those watercourses screened into the assessment (see Figure 3-4 and JBA Consulting, 2014a). To ensure that adverse impacts do not arise on Natura 2000 sites and other protected species as a result of structural maintenance operations undertaken during the period 2015-2019, the following pre-works mitigation checklist as detailed will be implemented. 2014s1164 Killimor Natura Impact Statement v2.4 46
Table 6-3: Pre-works mitigation checklist for bridge/structure works Checklist Mitigation Response Required If yes - Follow protocols and SOPs in OPW (2011b) - specifically points 2.1, 2.2, 3.1 and Will structure maintenance works require in- 3.2 of Environmental Drainage Maintenance channel working? Guidance SOP to control silt mobilisation and relevant species specific SOPs to minimise physical damage. Is the structure constructed of brick or stone and in a poor state of repair (i.e. numerous If yes - Ensure a bat roost potential cracks, crevices and voids that could be used assessment is conducted. Further nocturnal by roosting bats)? activity surveys will also be undertaken if the roost potential assessment concludes they are Does the structure have dense Ivy cover required. which could be used by roosting bats? If yes - Ensure the work is conducted outside Does the structure contain voids, cracks or of the nesting bird season or prior to works a ledges that are or could be used by nesting survey for the presence of nesting birds is birds? conducted If yes - Ensure the work is conducted outside Is the structure located within an area of of the nesting bird season or prior to works a dense bankside scrub/vegetation which could survey for the presence of nesting birds is be used by nesting birds? conducted Is the structure located within an area of If yes - Ensure a survey is conducted prior to dense bankside scrub/vegetation which could works to check for the presence of any be used as a resting place by Otter or protected species. Badger? Are non-native invasive species present in the If yes - follow the SOP for invasive species in area immediately around the structure? OPW (2011b)
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7 Conclusions This Natura Impact Statement details the findings of the Stage 2 Appropriate Assessment conducted to further examine the potential direct and indirect impacts of proposed drainage maintenance works in the Killimor Arterial Drainage Scheme on the following Natura 2000 sites: Ardgraigue Bog SAC (002356) Barroughter Bog SAC (000231) Lough Derg, North-East Shore SAC (002241) Lough Derg (Shannon) SPA (004058) Slieve Aughty Mountains SPA (004168) The above sites were identified by a screening exercise that identified likely significant effects in relation to the above sites. This screening exercise was conducted following the methodology outlined in Ryan Hanley (2014a), which examines three source > pathway > receptor chains; surface water, land and air, and groundwater pathways. The Appropriate Assessment investigated the potential direct and indirect impacts of the proposed works on the integrity and interest features of the above Natura 2000 sites, alone and in- combination with other plans and projects, taking into account the site's structure, function and conservation objectives. The three pathways of potential impact were again used as a framework of assessment. Where potentially significant adverse impacts were identified, a range of mitigation and avoidance measures have been stipulated to help offset them. As a result of this Appropriate Assessment it has been concluded, that the avoidance and mitigation measures suggested, the proposed drainage maintenance operations in the Killimor Arterial Drainage Scheme will not have a significant adverse impact on the above Natura 2000 sites. To confirm this conclusion, the following checklist, taken from DEHLG (2009) has been completed. Table 7-1: Integrity of Site Checklist (from DEHLG, 2009) Conservation objectives: does the project Y/N or plan have the potential to: N - Following mitigation, no significant adverse Cause delays in progress towards achieving residual impacts have been identified that will the conservation objectives of the sites? prevent achievement of the conservation objectives of the identified sites N - Following mitigation, no significant adverse Interrupt progress towards achieving the residual impacts have been identified that will conservation objectives of the sites? prevent achievement of the conservation objectives of the identified sites. N - Potential adverse impacts identified during Disrupt those factors that help to maintain the the screening process can be mitigated favourable conditions of the site? against. N - Potential adverse impacts on the waterbirds Interfere with the balance, distribution and of Lough Derg (Shannon) SPA and the raptors density of key species that are the indicators of Slieve Aughty Mountains SPA can be of the favourable condition of the site? avoided by appropriate timing of the maintenance works.
Other objectives: does the project or plan Y/N have the potential to: Cause changes to the vital defining aspects N - Potential adverse impacts from suspended (e.g. nutrient balance) that determine how the solids and nutrient release can be effectively site functions as a habitat or ecosystem? mitigated.
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Other objectives: does the project or plan Y/N have the potential to: N - Potential adverse impacts relating to Change the dynamics of the relationships hydrological status and water quality have (between, for example, soil and water or been identified which could impact on the plants and animals) that define the structure functioning and dynamics of the site however and/or function of the site? these can be effectively mitigated. Interfere with predicted or expected natural N - Potential adverse impacts from changes to changes to the site (such as water dynamics the hydrological regime, suspended solids and or chemical composition)? nutrient release can be effectively mitigated. N - Potential adverse impacts on SAC habitats Reduce the area of key habitats? can be effectively mitigated to ensure no loss of key habitats. N - Potential disturbance impacts to SPA bird populations can be effectively mitigated to ensure populations are not reduced. Mitigation Reduce the population of key species? can also be implemented to protect populations of key species present, but for which the SACs and SPAs are not designated (e.g. Otter, bats, Badger, Salmon, Lamprey). N - Potential disturbance impacts to SPA bird populations can be effectively mitigated to ensure population dynamics are not adversely effected. Mitigation can also be implemented to Change the balance between key species? protect populations of key species present, but for which the SACs and SPAs are not designated (e.g. Otter, bats, Badger, Salmon, Lamprey). N - The identified mitigation measures to protect designated habitats and species will Reduce diversity of the site? ensure that the current diversity of the sites is maintained. N - Potential disturbance impacts to SPA bird populations can be effectively mitigated to Result in disturbance that could affect ensure populations are not reduced. Mitigation population size or density or the balance can also be implemented to protect between key species? populations of key species present, but for which the SACs and SPAs are not designated (e.g. Otter, bats, Badger, Salmon, Lamprey). N - The proposed works will be undertaken Result in fragmentation along existing maintenance access corridors and therefore no fragmentation will occur. Result in loss or reduction of key features (e.g. N - Potential adverse impacts on SAC habitats tree cover, tidal exposure, annual flooding can be effectively mitigated to ensure no loss etc.)? of or reduction of key features.
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Appendices A OPW Arterial Drainage Maintenance Service: Environmental Management Protocols and Standard Operating Procedures
2014s1164 Killimor Natura Impact Statement v2.4 I
The Office of Public Works
Arterial Drainage Maintenance Service
Environmental Management Protocols
&
Standard Operating Procedures
The Office of Public Works Environment Section West Region Drainage Maintenance Headford Co. Galway Telephone: +353 (0)93 35 456 Fax: +353 (0)93 35 631 The Office of Public Works Arterial Drainage Maintenance Environmental Management Protocols & Standard Operating Procedures
Contents: Current Version Environmental Management Protocols April 2011 Environmental Drainage Maintenance Guidance Notes (10 Steps to Environmentally Friendly Maintenance) April 2011 Lamprey Standard Operating Procedure V2 April 2009 Crayfish Standard Operating Procedure V2 April 2009 Otter Standard Operating Procedure V2 April 2009 Mussels Standard Operating Procedure V2 April 2009 Invasive Species Standard Operating Procedure V2 March 2009 Zebra Mussel Standard Operating Procedure V2 May 2009 Blank OPW/ EREP Audit Form April 2011 NPWS Local Contact Details May 2009 Fisheries Contact Details April 2011 OPW Bridges on National Primary Roads March 2009
This document is uncontrolled in hard copy format. Hard copies should be validated against the revision level of the online version prior to use. w ww.opw.ie ENVIRONMENTAL MANAGEMENT PROTOCOLS
ARTERIAL DRAINAGE MAINTENANCE SERVICE (APPLICABLE TO ENGINEERS, TECHNICIANS AND FOREMEN)
PART I – OPERATIONS MANAGEMENT
COMMUNICATIONS - STATUTORY STAKEHOLDERS By the end of September of each year, each Drainage Region to forward a draft copy if its Annual Works Programme for the coming year to OPW’s Environment Section, and to the Inland Fisheries Ireland (IFI) EREP Project Manager who will review it for appropriate sites and study locations for the Environmental River Enhancement Programme 2008 -2012. By end of November of each year, each Drainage Region to forward the relevant sections of the Finalised Annual Maintenance Programme for the coming year with a copy of appropriate scheme maps, to the National Parks & Wildlife Services (NPWS) Regional Managers and the IFI Directors. When compiling the programme the type of works proposed should be indicated for each channel under the headings A-F to facilitate the Screening for Appropriate Assessment (AA). A – Silt & Vegetation Management B – Aquatic Vegetation Cutting C – Bank Protection D – Bush Cutting/Branch Trimming E – Tree Cutting F – Bridge/ Structure Repairs Ideally, approximate timing (season/month) and approximate duration of works should be included for each channel. Works that fall within SACs, SPAs or NHAs are to be highlighted on the programme. As a follow up, the Drainage Regions offer the opportunity for a meeting with the stakeholders to discuss the programme and where a meeting is requested, preferable for this to take place as early as possible in the year. Prior to entry onto a channel contained wholly or partly within an SAC, SPA or NHA, three weeks notice in advance of entry, and for SAC & SPA an AA Screening Statement/Conclusion Statement must be completed and forwarded through the NPWS District Conservation Officer.
INTERIM STAKEHOLDERS MEETINGS In addition to the start of the year stakeholder meeting to overview the Annual Works Programme, Regional Offices will offer and facilitate a schedule of more frequent and catchment focused meetings. The need and the frequency of these meetings will be determined on a regional basis in partnership with the relevant stakeholders. Typically a frequency of every 2-3 months to discuss the following 2-3 months work on the catchment, identifying any further environmental sensitivities, appropriate mitigating measures, follow up joint site visits where deemed beneficial and flagging any opportunities for added benefit in proposed River Enhancement works. Typical attendance includes a range of OPW Management Staff, i.e. Engineer, Technician and/or Foreman, NPWS Rangers and/or DCO and IFI Officers. OPW Engineer will compile minutes of the meeting to record attendance and a brief account of main decisions and follow up actions. Any channel specific information resulting from these meetings, such as timing requests should be entered into the Records Database in accordance with the National Recording Process. Fruitful consultations with statutory stakeholders such as NPWS and IFI are of critical importance to continuously improving environmental performance. However, in the interest of maximising the efficiency of stakeholders input, Management Staff are as far as practical, to plan their consultative requirements and address a range of aspects in any one discussion forum. Interim Stakeholder Meetings or similar forums offer good opportunities to maximise consultation efficiencies.
CORRESPONDENCE All Environment related correspondence/complaints should be logged on the Engineering Services Correspondence Database as per normal protocol. Complaints received should be forwarded to the Environment Section should assistance be required.
WALKOVER SURVEYS As a component to the EREP Project, on a number of channels, EREP team will request for Walkover Surveys as an opportunity to discuss in detail on site the environmental options for a particular channel with a range of relevant stakeholders. Typical attendance will be an IFI EREP representative, a range of OPW Management Staff and relevant Operational Crew if deemed beneficial, local IFI Officer and/or NPWS Ranger or DCO. OPW Management Staff to liaise with EREP team and coordinate the site visit with local IFI and NPWS to facilitate their participation if these stakeholders wish to attend. Environmental procedures as agreed on-site will be recorded by IFI EREP team and issued to the OPW Engineer as part of the design guidance for the particular Enhanced Maintenance works. Regional Management Staff to ensure that Operational Staff carry out the works in accordance with the agreed procedures.
NATURA 2000 SITE ASSESSMENTS All scheduled maintenance operations in the vicinity of a Natura 2000 Site i.e. an SAC or SPA, will require Screening for Appropriate Assessment and Stage II Appropriate Assessment where required. By the end of September of each year, each Drainage Region to forward a draft copy if its Annual Works Programme for the coming year to OPW’s Environment Section to facilitate this process. Environment Section will procure the Ecological Consultant, collate all the channel lists and issue completed AA Screening Statements/Conclusion Statements to the respective OPW engineers as completed. The Ecological Consultant will consult with OPW management to define the precise extents of proposed works in each Natura 2000 Site. In addition, the Ecological Consultant will be carrying out walkover surveys for pre and post maintenance works for a representative number of the sites and OPW Management will be required to facilitate the same. OPW Management Staff will issue the relevant completed Assessments directly to the NPWS District Conservation Officer.In addition, Environment Section will issue all of the Assessments to the Development Applications Unit, DEHLG, Dun Sceine, Harcourt Lane, Dublin 2. Preferably for the Assessments to be forwarded to the DCO as soon as it is completed, but in any case with a minimum of three weeks notice before commencement of the works. Management Staff to implement all prescribed mitigating measures and ensure that Operational Staff are made aware of all relevant site specific mitigating measures.
Current version of Designated Sites GIS Layers available on Socialtext
Environmental River Enhancement Programme (EREP) After reviewing the draft Annual Works Programme, IFI EREP team will revert to the respective Regional Engineers Office and request follow up meetings as required to discuss aspects of the programme in relation to the EREP. Enhancement sites require ground truthing to ensure they are technically feasible as envisaged. This is to be coordinated by the IFI EREP team with local IFI and OPW personnel as required. Sites shortlisted by IFI EREP team for Capital Enhancement works are emanating from a screening process of technical feasibility in terms of gradient and water quality. In the future, sites selected will increasingly be resulting from other requirements such as the Water Framework Directive Programme Of Measures under Morphology. IFI EREP team in consultation with the local IFI and OPW, will prioritise sites on a basis of best return for investment. IFI EREP team will liaise with the Regional Offices to assist in identifying channels deemed suitable for capital enhancement which should be integrated with the following years work programme. In some cases, a situation may arise where the site selected is not overlapping with the current Annual Works Programme but where feasible and subject to any third party agreement, OPW will accommodate these works. Similarly for enhanced maintenance works, IFI EREP team in consultation with the local IFI and OPW, will select sites again that are technically feasible and offer best return for investment. These sites will normally be from channels on the current Annual Works Programme. IFI EREP team will coordinate all the scientific monitoring works, provide the enhancement design details and guidance to OPW Management Staff and maintain a reasonable level of site supervision, proportional to the complexity of the works and the experience of the OPW Staff involved. Consultations with local IFI through the Interim Stakeholder meetings are encouraged to identify sites suitable for Enhancement works and in some cases the local IFI may also be in a position to produce an enhancement design. All enhancement designs and works are to be coordinated through the IFI EREP team to facilitate formal recording into the national EREP project and allow for biodiversity and/or hydromorphology monitoring if required. Local IFI may coordinate with IFI EREP team or alternatively OPW Regional Staff coordinate directly with the EREP team. A small portion of channels have more infrequent maintenance cycles and these cases can offer particularly good opportunities for enhanced maintenance type works. Channels programmed where maintenance works have not being carried out for in excess of 10 years, to be flagged to IFI EREP team for possible Walkover Surveys and guidance on appropriate EDM procedures. Management Staff to ensure that as far as practical, all Operational crews have an opportunity to get experience on these projects. Each Regional Engineer is to make provision in the Annual Works Programme for Plant & Labour resources in addition to provisions in the Annual Budget for materials subject to expenditure constraints. Typical resources are as follows:
Capital Enhancement Region Target Capital Machine ManWeeks (Km) Costs Weeks East Region 20 €200,000 30 60 South West Region 14 €140,000 21 42 West Region 16 €160,000 24 48
50 €500,000 75 150
Enhanced Maintenance (in conjunction with routine maintenance) Region Target Capital Machine ManWeeks (Km) Costs Weeks East Region 20 15 0 South West Region 14 11 0 West Region 16 12 0
50 38 0
Progress targets for EREP to be shown on monthly production reports. OPW are the primary contact point for liaison with landowners including the organising of access and egress for machinery and materials. Brochures on EREP are available in all Regional Offices. Additional copies can be obtained through OPW Environment Section. Management Staff are encouraged to maximise the use of all available on-site materials such as stone from historical spoil heaps as opposed to importing materials at a higher cost. In addition, Management Staff are encouraged to maximise synergies with other funding sources such as Fisheries Development grants attained by local Angling Clubs which could combine with OPW plant and labour to supply materials. In all cases, Inland Fisheries Ireland are the statutory authority to give design guidance to OPW. Angling Clubs or other sectoral funding sources to liaise with the Fisheries authorities in respect of all design and environmental monitoring requirements. As-Built plans are to be completed by the IFI EREP team for all enhancement works. This will entail a site visit by IFI and relevant OPW Staff where requested. These will be retained by IFI as well as any relevant design information. IFI EREP team will forward a copy of the As-Built plans to Environment Section who will upload the same to Socialtext for access to the information by all Staff. At the end of the year, IFI EREP team will forward Environment Section a GIS layer of that year's works for uploading to OPWs GIS records.
Current version of Enhancement GIS Layer available on Socialtext
NATIONAL RECORDING PROCESS Weekly Record Cards can contain information on Lamprey, Crayfish, Kingfisher, Mussels, Otter and other site specific environmental information as arises. Environmental information on Cards will be recorded onto the Records Database by each Drainage office. The latest Records Database has been revised to integrate environmental records. On an interim basis, a copy of all Cards with environmental information to be copied and forwarded to Environment Section by each Drainage Office. This is to allow Environment Section to review the detail of information being recorded, feedback to the Operational crews through the Management Staff and attain a national consistency in the style of information being recorded. All relevant information to be uploaded to GIS by Environment Section. All other relevant environmental information sourced by Management Staff whether from direct observations or through stakeholder consultations, should be entered into the Records Database. Relevant environmental information sourced through the EREP project and related research will be forwarded by IFI EREP team to Environment Section directly for centralised GIS uploading. On an annual basis, Environment Section will compile an update of Weekly Records Cards species records and make available to all Staff via Socialtext to assist in tracking progress. On an ongoing basis, Environment Section will make available the various OPW compiled species records to other authorities to assist in contributing to any appropriate national conservation knowledge. As described above, each drainage office will upload onto the Records Database all environmental information from the Weekly Record Cards and all other broader environmental information attained by Management Staff. Within a few years, it's envisaged that multiple regional Staff will be able to use the new Records Database, and then environmental information from all sources will be uploaded directly by a whole host of Staff. Typically this will include any mitigating agreements for particular channels agreed with stakeholders or any other individuals observation such as protected species presence noted during a separate site visit.
SALMONIDS As far as practicable, the maintenance works are to be scheduled to accommodate salmonid (Salmon & Trout) spawning areas, as is in place across all regions for many years. This is a widespread measure on many catchments and is most applicable to medium gradient channels with gravel substrate. Prior to works commencing, consult with local IFI. Ideally, consultations to be conducted through Interim Stakeholder Meetings or alternatively, direct contact in respect of the specific site. Maintenance operations on salmonid spawning beds typically carried out between July and September but timing subject to adjustment due to local knowledge of IFI. Raking of spawning gravels to improve spawning capacity also typically carried out between July and September. River enhancement works to enhance both the fisheries and the broader ecology of the drainage channel are covered under the EREP project. In the future, as the extent of completed enhancement works increases, there is a risk of damage to structures due to future maintenance. All channels scheduled for maintenance to be checked against GIS records for presence of previous enhancement works. Where a presence is indicated, carry out a site visit as appropriate and in consultation with IFI , devise on-site procedures to protect or enhance existing instream structures.
Current version of Enhancements & Spawning GIS Layers available on Socialtext.
LAMPREY (BROOK, RIVER & SEA) & CRAYFISH All channels scheduled for maintenance to be checked against GIS records for presence of Lamprey or Crayfish. In accordance with the SOPs, Operational Staff will closely observe the spoil three times daily and report to the Foreman any Lamprey or Crayfish located. Mitigating procedures to apply when: ◦ GIS records indicate species presence, or ◦ Operational Staff locate Lamprey or Crayfish during operations, or ◦ Where particularly suitable habitat is identified by an environmental stakeholder. If significant populations are encountered, notify IFI EREP team and facilitate scientific studies if site deemed suitable by IFI. If significant populations are encountered, notify NPWS Ranger and local IFI Officer and conduct site visit as necessary. Combination of Mitigating Measures to be selected as applicable to the site while balancing the Flood Risk Management requirements and a sustainable approach to the conservation of Lamprey and/or Crayfish. Identify extent of channel applicable and the mitigating measures to apply. Inform Operational Staff of mitigating requirements.
Suite of relevant Mitigating Measures as follows:
On site measures Skip sections to retain intact habitat either in one long reach or multiple short reaches. Maintenance in an upstream direction to avoid secondary disturbance of a species moving downstream. Balance with the advantage of maintenance in a downstream direction where instream vegetation minimises siltation. Confine maintenance to 2/3 of channel width leaving marginal vegetation and silt intact. Maximise use of weed cutting bucket particularly where aquatic vegetation removal is the primary objective. This is effective for Lamprey juveniles as they are in the silt. For Crayfish, cutting of “Flaggers” type vegetation is effective but cutting of “water celery” mat type vegetation is less effective as it can result in Crayfish being removed within the weed mass.
Forward planning measures Annual maintenance of the channel in shorter segments sequentially completing the same over a number of years. Balance with maintaining reasonably operational efficiency in terms of machinery moving, transport, access and egress. Longer time periods between maintenance cycles e.g. move from 4-6 years to 7 to 8 years. Balance with overall river ecology as longer maintenance cycles will lead to more heavy- scale works. Timing of maintenance to accommodate Lamprey spawning. Stakeholder consultations between OPW and local IFI for salmomid mitigating purposes, to include consideration of Lamprey spawning. This is to be applied to channels where Lamprey spawning habitat is known as informed by IFI or other stakeholder. For River & Brook Lamprey, no works on relevant spawning channel from end March to start of June subject to adjustment due to local knowledge of IFI. For Sea Lamprey, as they spawn during the summer months, restrictions from late April to early July are required. To be applied to channels where Sea Lamprey spawning is known as informed by IFI or other stakeholder and timing subject to adjustment due to local knowledge of IFI. Note that Sea Lamprey are much less widespread so envisaged that the scale of this mitigation will be very limited. Loosening spawning bed gravels. Stakeholder consultations between OPW and IFI for salmonid gravel loosening purposes, now to include consideration of Lamprey spawning as above. Enhance channel profile such as skewed cross section and promote deposition of silt along margins. Integrate with IFI discussions on planning the EREP to avail of enhancement opportunities particularly for channels where Lamprey or Crayfish presence is recorded. Modification of OPW structures which impede upstream migration. Identification of weirs as barriers to be as informed by IFI or other stakeholder. Where modification designs required, liaison with IFI EREP team to integrate the improvement works into the EREP project. Identification of a bridge apron step attained through ongoing site inspections by OPW Management Staff or other stakeholder. In consultation with IFI, steps at bridges to be modified by a rock armour type ramp or similar. Envisaged that these measures will be of a limited scale on drained channels.
GIS Records: Where Lamprey or Crayfish are discovered, Operational Staff will have recorded the same on the Weekly Record Cards. Cards with species location information will be uploaded to the Records Database as stated in the National Recording Process. All new Lamprey spawning location information attained through stakeholder consultation to be recorded on the Records Database in accordance with the National Recording Process. All database records of species location will be uploaded to GIS by Environment Section. IFI EREP team conducting ongoing research on Lamprey & Crayfish as a component of the EREP works. Scientific data calculating species density for some sites will be developed and to be supplied by IFI to OPW and uploaded to GIS by Environment Section.
Current version of relevant SOPs: V2 April 2009 Current version of relevant GIS Layers available on Socialtext.
OTTER Research to date indicates that Otters are widespread across all sizes of drainage channels nationally, hence it is prudent to assume that Otter use any particular site. In accordance with the Otter SOP, Operational Staff will walkover the works area one week in advance in conjunction with the Health & Safety assessment noting dense cover with access directly to the water that is to be avoided where feasible. In addition, any recognisable signs of Otter presence observed such as Spraints, Footprints or suspected Holts, will be recorded on the Weekly Record Cards. These signs were identified in Otter Awareness Training carried out across all regions in 2008. While holts are usually well concealed, where Operational Staff observe a suspected holt such as a burrow opening, in consultation with Management Staff, subject to flood risk management functions, no works to within a 50m buffer each side.
Bridge mammal crossing enhancement As a component of ongoing consultations with NPWS and other stakeholders, evidence may arise from time to time as to a particular spot for Otter road kill. Typically this can arise where the Otter always traverses the roadway as opposed to going through the bridge. While this scenario is not known to be a widespread issue in Ireland, the highest risk locations are on the National Primary Roads which have the heaviest traffic volumes. There are 170 National Primary Road bridges on OPW channels as listed in the table referenced below and Management Staff are to have particular regard to these locations if evidence arises on a possible road kill “hot spot”. Enhancement works will typically take the form of a bolt-on wildlife ledge or similar. Design and configuration is to carried out in consultation with NPWS and relevant Local Authority. On an annual basis, Environment Section will review the national website www.biology.ie which records Otter road kill reports from the public. Any road kill location which overlaps with an OPW channel will be flagged by Environment Section to the relevant Management Staff. Current understanding is that Otter road kill is not a significant issue in Ireland. It's envisaged that while the justification for bridge mammal crossing works may arise for some scenarios, these measures will be of a limited scale on drained channels.
Current version of Otter SOP: V2 April 2009 Current version of National Primary Roads & OPW Bridges: March 2009
FRESHWATER PEARL MUSSEL GIS records from NPWS show the locations of the 91 known FWPM populations in Ireland. The following OPW channels have been identified as containing FWPM:
Channel Scheme Location Most Recent Record CH9 Corrib Headford Oughterard 2009 C1/21/3 Moy Approx 500yrds from outfall to into L. Cullin 2004 C1 Sect M&N Moy Ballygallagart 2004 C1/21/14 Moy Crossmolina 2008 C1 Dunmanway FRS d/s of the Long Bridge 2003 C1 Owvane Approx 1400 yrds from outfall 2002 C1 Feale d/s Listowel near Scartleigh cemetary 2006 **Owenaher Moy u/s of C1/54 1996 **Brown Flesk River Maine Trib of C1 Maine near Farranfore 1987 ** Galey River Feale Approx 1400yrds u/s of C1/18 near Ahavoher Br. 1950 **River Liffey Ryewater (Lucan) Approx 3.5km d/s C1 Ryewater outfall 1894 ** Although not on OPW channels - these channels may or may not contain populations of FWPM. Works in the vicinity which could impact on a possible population need to be considered in close consultation with local NPWS knowledge.
While highly unlikely to have instream works in a FWPM habitat, if a new population located by Operational Staff during operations, works to cease. Notify NPWS and in consultation with NPWS, area to be skipped or non in-stream works carried out as agreed for the specific site. For operations in the vicinity of known populations, mitigating procedures to apply: Consult with NPWS and local IFI and conduct site visit as necessary. ◦ Typically only selective non in-stream works adjoining the population. ◦ Works such as removal of a fallen tree is to be completed by lifting clear of the channel to minimise any channel bed disturbance due to the branches being dragged. ◦ Assess need for silt management procedures for works upstream of the population and implement in consultation with NPWS.
Current version of relevant SOPs: V2 April 2009 Current version of FWPM GIS Layer available on Socialtext.
SWAN & DUCK MUSSELS Swan and Duck Mussels are not strictly a protected species, however they are of conservation interest. Both species are similar in appearance and habitat requirements and distinguishing between them is not necessary unless local environmental stakeholders can identify the exact species. As the Mussel SOP, if Operational Staff locate the same, Management Staff will be notified. Where significant populations are encountered notify NPWS Ranger and local IFI Officer, and where they are interested in visiting the site, facilitate a site visit as necessary. Identify extent of channel applicable and the mitigating measures to apply. Typical Mitigating Measures include: ◦ Operational Staff to observe spoil and return any Mussels to the channel whom are expected to recolonise the channel bed. ◦ Maximise use of weed cutting bucket particularly where aquatic vegetation removal is the primary objective. ◦ Skip sections to retain intact habitat either in one long reach or multiple short reaches. ◦ Confine maintenance to 2/3 of channel width leaving marginal vegetation and silt intact. Record species presence on the Weekly Record Cards which will be recorded on the Records Database.
Current version of relevant SOPs: V2 April 2009
KINGFISHER Avoid disturbing nesting sites in banks. Visual sightings of Kingfisher by Operational Staff to be recorded on the Weekly Record Cards. Sightings by Management Staff to be recorded on the Weekly Record Cards where works in progress or on other occasions, record by separate map or channel reference format. All sightings to be recorded on the Records Database in accordance with the National Recording Process. All database records of species location will be uploaded to GIS by Environment Section. On an annual basis, Environment Section will issue the records to Birdwatch Ireland whom will add to the national Kingfisher database.
Current version of Kingfisher GIS Layer available on Socialtext.
BIRDS Removal of any abnormally dense layer of vegetation is to be executed between September and February (inclusive) to minimise impacts on nesting birds unless there are other overriding requirements such as Health & Safety. For SPAs containing important over-wintering bird populations, in consultation with the NPWS, regard to be given to timing or phasing of the works to minimise potential disturbance.
BATS While the removal of large mature trees is not typically a requirement of maintenance works, where the case arises, in consultation with NPWS, regard to be given to the likelihood of bat roosting habitat. Typical mitigating measure would be to leave tree in fallen position for 24hrs to allow any bats vacate. Masonry bridges offer niches and crevices suitable for bat roosts and where masonry bridges are scheduled for maintenance works, regard to be given to the likelihood of bat roosting habitat. Typical maintenance works at low level such as wing wall repair or underpinning foundations have limited potential to impact on bat roosts. Where the case arises that repair works are to be above the high water level such as the upper arch, in consultation with NPWS, assess the potential for the works impacting on bat roosts. Typical mitigating measure would be to contract a bat specialist to survey for bat presence before works commence, to avoid entombment of any bats.
WETLANDS - BOGS, FENS & TURLOUGHS All channels scheduled for maintenance which overlap SAC designations to be checked against the list of channels that impinge on Raised Bog, Fen habitat or Turloughs and have regard to any NPWS agreements noted *. OPW Management Staff to consult with NPWS for expert opinion as to any evidence of ongoing ecological decline of the Bog, Fen or Turlough and judgement on, if the drainage datum set by the Drainage Scheme and its maintenance is an ongoing contributing factor by affecting the hydrological regime of the same. Where a likely impact is identified, conduct site visit as necessary and in consultation with NPWS, mitigating measures to be selected such as: Skipping the channel in question while taking cognisance of the flood risk management requirements. Maximise use of weed cutting bucket particularly where aquatic vegetation removal is the primary objective. Inspection by OPW line management to assess the possibility of over digging the channel below the original design datum. Presence of an existing water level control such as a bridge floor to be established and alternative reference datum to be installed if deemed warranted.
* Environment Section currently developing a list of channels which overlap with Raised Bog, Fen habitat and Turloughs within SACs. Channels that are subject to a previous NPWS agreement /understanding of the extent of maintenance will be recorded.
Current version of Wetlands channels list available on Socialtext.
INVASIVE SPECIES – PLANTS Multiple invasive plant species are widespread nationally as described in the SOP and prudent to assume that one or more of these plants can be present on any works site. At present the OPW does not have any direct responsibility for the management of Invasive species. However to ensure OPW operations are not a vector for these invasives, measures are required to reduce the risk of spread. Ensure machine washing equipment transported to site for all appropriate machinery movements as described in the Invasive Species SOP. Ongoing EDM site audits by Environment Section will include confirmation that machine washing was executed in accordance with the SOP for the last applicable machine transfer. In some cases, OPW will assist other authorities in the control of invasive species. In these projects, the works are typically carried out in partnership between a number of authorities such as IFI, NPWS and relevant Local Authority. As scenarios arise where OPW are requested to assist in an invasive species control project, Management Staff are encouraged to support the multi-authority partnership model which will maximise resource efficiencies for all parties while still achieving a broader environmental good.
Current version of relevant SOP: V2 March 2009
INVASIVE SPECIES – ZEBRA MUSSEL Zebra Mussels are present in the River Shannon, Grand Canal and are in many lakes such as L Derg, L Ree, L Garra, L Key, L Derragh, Derravaragh, L Sheelin and L Corrib. This species is spreading and it is prudent to assume that works in any large sluggish river or near a lake has potential to contain Zebra Mussel. For any proposed works in the vicinity of potential Zebra Mussel waters, flag for Operational Staff and ensure particular attention to cleaning procedures for all equipment prior to removal from site. Any new location of Zebra Mussel uncovered during operations, notify NPWS and IFI for their information. Record on Weekly Record Sheet which will be uploaded on the Records Database in accordance with the National Recording Process. On an annual basis, Environment Section will collate the records nationally and issue to any relevant authorities to assist in tracking the species spread.
Current version of relevant SOP: V2 May 2009
TREE MANAGEMENT A small portion of channels have more infrequent maintenance cycles typically where self cleaning gradients are present. These sites can entail abnormally dense tree cover which may be required to be managed for conveyance or fisheries purposes. Removal of any abnormally dense layer of vegetation is to be executed between September and February (inclusive) to minimise impacts on nesting birds unless there are other overriding requirements. IFI requests to reduce “tunnelling” on drainage channels to be accomodated where feasible. OPW Management Staff to facilitate a site visit with the IFI Officer as required and devise a selective approach to the tree removal so as to retain a dappling of shade along the channel length. Excess woody vegetation to be collected and utilised by the following in order of preference: ◦ Reused by adjoining landowner for domestic firewood. ◦ Subject to landowners agreement, stockpile excess to form natural cover and niche habitat, preferably with some connection of cover to the channel e.g. along a hedge leading to the water. ◦ Shred and spread along the adjoining top of bank allowing the material to degrade rapidly and recolonisation of the underlying vegetation.
ENVIRONMENTAL DRAINAGE MAINTENANCE (EDM) GUIDELINES A portion of operational crews will be audited annually for implementation of the EDM Guidelines and other standard environmental procedures as adopted. Auditing will be carried out separately by both IFI and OPW Environment Section on a rotational basis to ensure all operational crews are audited at least once every three years. Audit results will be recorded on a standard format with the following feedback: ◦ All audit results will be forwarded to the relevant Engineer for that Drainage Scheme within two working weeks. ◦ In the event of an audit showing elements of unreasonable non-compliance with procedures, the relevant Engineer will be notified within one working day. ◦ Audit results will be forwarded to OPW Systems Co-ordinator for inclusion in monthly regional benchmarking reports. ◦ IFI EREP team will compile an overall summary of their findings in their end of year report under the EREP project. Design for Enhanced Maintenance works under EREP will include a design element for full scale implementation of the EDM Guidelines such as Boulder Replacement and Excavating Pools. Management Staff to ensure that as far as practical, all Operational crews have an opportunity to get experience on these projects.
Current version of EDM Guidelines: April 2011 Current version EDM Audit Sheet: April 2011 PART II – DEPOT MANAGEMENT
DEPOT WASTE MANAGEMENT
12 Waste Management Plans are available on Socialtext covering the 12 Drainage Offices. Environment Section will review 2 plans per annum and audit implementation. Updated Plans together with an overview of findings will be forwarded to the relevant Coordinator and uploaded to Socialtext.
FUTURE REVISIONS
Envisaged that this set of Protocols will be a fluid document and will be periodically updated as procedures are revised or new procedures introduced. In addition, to be used as a framework document for quality control purposes to reference the latest versions of all supporting information.
Inland Fisheries Ireland March 2011
IFI Region Director Address Telephone Region/Scheme IFI Blackrock William Walsh 15a Main Street 01 2787022 East: Glyde & Blackrock Co. Dee, Boyne, Dublin Blackwater, Bally-Teigue IFI Ballina John Connelly Ardnaree House 096 22788 West: Moy, Bonet Abbey Street Ballina Co. Mayo IFI Ballyshannon Dr. Milton Station Road 071 9851435 West: Donegal Matthews, Ballyshannon Co. schemes, Kilcoo, Donegal Duff IFI Limerick Sean Ryan Ashbourne 061 300238 East: Inny, Brosna Business Park West: Boyle, Dock Road Ballyglass Limerick South: Killimor, Carrighahorig, Nenagh, Groody, Maigue, Deel, Feale IFI Macroom Dr. Patrick Buck Sunnyside House, 026 41221 South: Maine, Macroom Co. Owvane Cork IFI Clonmel Suzanne Campion Anglesea Street 052 80055 East: Brickey Clonmel Co. Tipperary IFI Galway Amanda Mooney The Weir Lodge 091 563118 West: Corrib Earl's Island Headford, Mask, Galway IFI Dr. Ciaran Byrne Unit 4 Swords 01 8842600 All Business Campus Balheary Rd Swords Co. Dublin
EREP Project Dr. Karen Unit 4 Swords 01 8842624 All Manager Delanty Business Campus Balheary Rd Swords Co. Dublin
(Note: Completed flood relief schemes are not listed but proposed works should be discussed with the relevant local IFI) OPW Bridges (numbering 170) intersecting National Primary Roads.
Scheme Channel ID Bridge No. National Route type Bridge Name Glyde and Dee C2 (7C) B80 N01 Glyde and Dee C2 (7E1) B839 N01 Glyde and Dee C2 (7E1) B840 N01 Broadmeadow and Ward C2/1 B230 N02 Broadmeadow and Ward C2/1 B239 N02 Broadmeadow and Ward C2 B204 N02 Coolatrath br. Broadmeadow and Ward C2/3 B243 N02 Broadmeadow and Ward C1/6/1 B86 N02 Broadmeadow and Ward C1/6/1/1 B96 N02 Broadmeadow and Ward C1/6 B68 N02 Broadmeadow and Ward C1 B16 N02 Boyne C1 B4 N02 Slane br. Glyde and Dee C2 (7H) B101A N02 Glyde and Dee C2 (17) B179 N02 Glyde and Dee C2 (14B) B118 N02 Glyde and Dee C2 (14) B867 N02 Glyde and Dee C2 (1) B30 N02 Glyde and Dee C2 (13) B111 N02 Glyde and Dee C2 (16B4) N02 Glyde and Dee C1 (1) B15 N02 Aclint Br Glyde and Dee C29 (2) B441 N02 Glyde and Dee C29 (3) B443 N02 Glyde and Dee C25 (8) B341 N02 Glyde and Dee C25 (7D1) B672 N02 Monaghan Blackwater C1/1/5 B7 N02 Monaghan Blackwater C1/1/5/6/1 B1 N02 Monaghan Blackwater C1/3/5/2 B8 N02 Monaghan Blackwater C1/3/6/3 B1 N02 Hoaf Br Boyne C1/8/24 BX1 N03 Boyne C1/8/23 B733 N03 Boyne C1/8/21 B723 N03 Boyne C1/8/16 B644 N03 Boyne C1/8 B126 N03 Clavens Br Boyne C1/8/8 B294 N03 Boyne C1/12/1 B875 N03 Dillon's Br Boyne C1/12/7 B915 N03 Owenmore Behy Bridge BX1 N04 Boyle C6/7/5 B2 N05 Ballanagare Br Boyle C6/7/1/4 B2 N05 Boyle C6/7/1 B3 N05 Cloonshanville Br Boyle C1/3/2/1 B4 N05 Boyle C1/9/1 B1 N05 Boyle C1 B4 N05 Old Lung Bridge Boyle C1/8 B1 N05 New Lung Bridge Boyle C1/45 B8 N05 Moy C1/31/2 B3 N05 Moy C1/31 B4 N05 Moy Not on a channel B2 N05 Trimoge Moy Not on a channel B2 N05 Moy Not on a channel B1 N05 Moy C1/30/3/1 B1 N05 Moy C1/28/2 B3 N05 Moy C1/28/1 B4 N05 Moy C1/25 B6 N05 Moy C1/23/3 B2 N05 Moy C1/23 B9 N05 Moy Not on a channel B1 N05 Moy C1/21/1/5/2/2 B3 N05 Moy C1/21/1/5/2/11 B2 N05 Moy C1/21/1/5/1/15 B1 N05 Moy C1/21/1/5/2/18 B1 N05 Moy C1/21/1/5/2/19 B2 N05 Moy C1/21/2/5/2/20/4 B1 N05 Boyle C1/44/15 B2976 N06 Boyle C1/44/17 B2984 N06 Boyle C1/64/1/11/6 B3337 N06 Boyle C1/64/1/11 B3303 N06 Miltownpass Br. Boyle C1/64/1/11/4 B3319 N06 Boyle C1/64/1/11/4/2 B3331 N06 Boyle C1/64/1/13/2 B3330 N06 Boyle C1/64/1/13 B3372 N06 Rochfort Br. Boyle C1/64/1/13/4 B3384 N06 Brosna C27 (1) B150 N06 Brosna C1 (1) B11 N06 Kilbeggan Br. Brosna C17 (1) B143 N06 Brosna C17 (SE) B726 N06 Brosna C17 (5) B138 N06 New Br Brosna C17 (4) B135 N06 Corrib Clare C1 B3 N06 Quincentennial Br. Nenagh C1/9 B23 N07 Ollatrim Br Nenagh C1/9/24 B4 N07 Monaghan Blackwater C1/1/6/1 B11 N12 Tyholland Br Blanket Nook C1/3 B23 N13 Swilly embankments E9 B1 N14 Swilly embankments C1/5 B9 N14 Deele and Swillyburn C1 B6 N14 Deele and Swillyburn C1/11 B19 N14 Deele and Swillyburn C2 B20 N14 Abbey C1/4 B39 N15 Abbey C1/4 B31 N15 Abbey C1/3A B30B N15 Abbey C1/2 B21 - B23 N15 Abbey C1/1 B18 N15 Duff C1 B1 N15 Bonet C1/12/3 B1 N16 Bonet C1/12 B5 N16 Bonet C1/12 B4 N16 Bonet C1/12 B2 N16 Bonet C1 B5 N16 Bonet C1/13/2 B1 N16 Bonet C1/13 B1 N16 Moy C1/50/2 B3 N17 Moy C1/50 B4 N17 Moy C1/48/3 B2 N17 Moy C1/48 B3 N17 Moy C1/45/4 B2 N17 Moy C1/45 B13 N17 Moy C1/30/5/9 B3 N17 Moy C1/30/5/9 B15 N17 Corrib Mask CM4/43/4 B2 N17 Corrib Mask CM4/34 B10 N17 Corrib Mask CM4/34/2 B2 N17 Corrib Clare C3/30 B8 N17 Corrib Clare C3/30/4 B1 N17 Corrib Clare C3/26 B2 N17 Corrib Clare C3/26/9 B1 N17 Corrib Clare C3/26/1 B3 N17 Corrib Clare C3/12/2 B1 N17 Corrib Clare C3 B14 N17 Corrib Clare C3 B2 N17 Claregalway bridge Fergus D7 B3 N18 Owenagarney C2 B1 N18 Owenagarney C4 B3 N18 Coonagh Embankments C10 B9 N18 Coonagh Embankments D13 B113 N18 Coonagh Embankments B1 N18 Maigue C1/36 B1 N20 Helena's br. Maigue C1/37/1 B3 N20 Maigue C1/37 B1 N20 Maigue C1 B23 N20 Creggane br. Maigue C1/33 B1 N20 Cappanafaha br. Maigue C1/30 B2 N20 Ballynabanoge br Maigue C1/26 B1 N20 Maigue C1/15 B10 N20 Maigue C1/10/5 B3 N20 Maine C1/28 BX1 N21 Maine C1/34 B117 N21 Maine C1/35 BX2 N21 Deel SR C12/2/2 B125 N21 Deel SR C12/2/2/2 B127 N21 Deel SR C12/2/1 B123 N21 Deel SR C10 B95 N21 Ballyfraley br. Deel SR C8 B76 N21 Reens br. Maigue C1/17/10 B1 N21 Maigue C1/17/8 B2 N21 Maigue C1/17/5 B1 N21 Maigue C1 B1 N21 Adare br. Maigue C1/15 B5 N21 Maine C1 B3 N22 Maine br. Maine C1/32 B110 N23 Dysert br. Maine C1/33 B114 N23 Killfinnaun br. Maine C1 B9 N23 Herbert br. Groody C1/4 B29 N24 Groody C1 B4 N24 Groody C1/7 B53 N24 Groody C1/9 B56 N24 Moy C1/9/1 B1 N26 Moy C1/9 B2 N26 Moy F/282 B N26 Moy C1/14 B1 N26 Moy RIVER B3 N26 Moy C1/37 B1 N26 Moy C1/38 B1 N26 Moy RIVER B2 N26 Cloongullaun br. Moy C1/39 B3 N26 Moy C1/39 B6 N26 Moy C1/39 B9 N26 Moy C1/39/3 B1 N26
Otter Wildlife Passes and OPW Drainage Channels
• It has been brought to the attention of the OPW that there may be a need for small mammal passes on some of the maintained channels.
• The National roads constitute less than 6 percent of roads in this country, approx. 3 National Primary and 3 percent National Secondary. In spite of this they a carry over 42 percent of the traffic. It is for this reason that the focus will be on the National Primary road crossings.
• The national road kill survey was analysed and the data from the web site “www.biology.ie” was cross-referenced against OPW channel locations and the results were inconclusive, as the web page is not widely used. It appears for now that OPW channel road crossings have no affect on the deaths of otters as per this information.
Next Steps: 1) Consult NPWS throughout all regions to review any evidence of otter road kills on National Primary roads or are they aware of any other such road deaths. 1. Where there appears to be mammal deaths on National Primary roads that intersect OPW channels it will be seriously considered to install in the bridge (where possible) a small mammal pass to allow ease of access for otters.
Otter Habitat Disruption • Otters, along with their breeding and resting places, are protected under the provisions of the Wildlife Act, 1976, as amended by the Wildlife (Amendment) Act, 2000. They are also included in Annex I and Annex IV of the Habitats Directive, which is transposed into Irish Law in the European Com- munities (Natural Habitats) Regulations (S.I. 94 of 1997), as amended.
Otter Pass Details • Mammal Ledges and underpasses should be constructed parallel to the watercourse. • Underpasses should be of a diameter of 600mm up to a length of 20m. Where lengths exceed this the pipe should be increased to 900mm diameter • An underpass should be no more than 50m of the watercourse with channels or fencing guiding the animals to it.
Where there is sufficient space under the bridge for a ledge the following should be provided: • Fencing: See “figure 1; Specification for Mammal Resistant Fencing” in the NRA, National Roads Au- thority, Guidelines for the Treatment of Otters Prior to the Construction of National Road Schemes, for more detail. Also, Design Manual for Roads and Bridges, DMRB Volume 10, Section 1, Part 5, Chapter 9. • A bolt on ledge can be used under a bridge where there is no dry passage. The bolt on ledge should provide otters with a dry walkway of between 300mm and 450mm wide, constructed from 4.5mm Durbar patterned galvanised plate. • At some sites, considerations of responsibility, cost, aesthetics or practicality might indicate the use of a solid ledge; this is most likely where an existing otter-ledge has proved to be sited too low to of- fer dry passage at spate conditions. A solid ledge can be created in 3 ways; concrete bagging, shut- tering plus new concrete and concrete blocks. • See (OPW, 2007), (DMRB, 2001) and (NRA 2006) for further Details
References • NRA (2006) – National Roads Authority, Guidelines for the Treatment of Otters Prior to the Construc- tion of National Road Schemes. • NRA (2005) – National Roads Authority, Guidelines for the Crossing of Watercourses During the Construction Of National Road Schemes. • OPW (2007) – Series of Ecological Assessments on Arterial Drainage Maintenance No. 4, Ecological Impact Assessment (EcIA) of the Effects of Statutory Arterial Drainage Maintenance Activities on the Otter (Lutra lutra). • OPW (2006) – Screening of Natura 2000 Sites for Impacts of Arterial Drainage Maintenance Opera- tions. Environment Section, Engineering Services, Office of Public Works. • DMRB (2001) - Design manual for roads and bridges (DMRB). Volume 10, Section 4 Environmental Design and Management Nature Conservation. Part 4 HA 81/99 Nature conservation advice in relation to otters. Section 1, Part 9 HA 81/99.
B Drainage Maintenance Activities Proposed for Killimor 2015-2019
2014s1164 Killimor Natura Impact Statement v2.4 II
Frequency of Last Unique ID Channel_Ref Scheme Maintenance (years) Maintenance Timing of Works Machine Type A B C D E Notes Summer (Instream) / Long Reach / Winter (Tree Weed Cutting Weed cutting in 2014 from 16km to 20km upstream from the confluence. Lower reaches of 0 C1 Killimor 1-2 years 2013 Cutting) Bucket (SR) X X X channel are not maintained due to proximity to Barroughter Bog. Spawning channel. Not maintained due to proximity to Barroughter Bog. Channel will be assessed if request for 7388 C1/1 Killimor - 2012 - - maintenance is received. Reviewed every 5/6 years. Not maintained due to proximity to Barroughter Bog. Channel will be assessed if request for 7333 C1/1/1 Killimor - 2002 - - maintenance is received. Reviewed every 5/6 years. 7414 C1/10 Killimor 4/5 years 2012 Summer Short Reach X 7449 C1/11 Killimor 4/5 years 2013 Summer Short Reach X 7385 C1/12 Killimor 4/5 years 2013 Summer Short Reach X 7417 C1/13 Killimor 4/5 years 2012 Summer Short Reach X 7493 C1/14 Killimor 4/5 years 2014 Summer Short Reach X 7313 C1/14/1 Killimor 4/5 years 2014 Summer Short Reach X 7375 C1/14/2 Killimor 4/5 years 2014 Summer Short Reach X 7389 C1/15 Killimor 4/5 years 2012 Summer Short Reach X 7496 C1/16 Killimor 5/6 years 2013 Summer Short Reach X Spawning channel, fast flowing and requires very little maintenance 7497 C1/16/1 Killimor 5/6 years 2012 Summer Short Reach X 7495 C1/16/2 Killimor 5/6 years 2013 Summer Short Reach X 7419 C1/16/2/1 Killimor 5/6 years 2013 Summer Short Reach X 7432 C1/17 Killimor 4/5 years 2013 Summer/ Winter Short Reach X 7434 C1/18 Killimor 4/5 years 2010 Summer/ Winter Short Reach X 1265 C1/19 Killimor 4/5 years 2012 Summer/ Winter Short Reach X Channel on “Channel V2” layer as ED at Garryard 7383 C1/2 Killimor 4/5 years 2012 Summer/ Winter Short Reach X 7377 C1/2/1 Killimor 4/5 years 2012 Summer/ Winter Short Reach X Long Reach / Weed Cutting 7502 C1/20 Killimor 6/7 years 2012 Summer Bucket (SR) X X Spawning channel 7311 C1/20/1 Killimor 6/7 years 2008 Summer/ Winter Short Reach X 7344 C1/20/10 Killimor 4/5 years 2014 Summer/ Winter Short Reach X 7317 C1/20/10/1 Killimor 4/5 years 2014 Summer/ Winter Short Reach X 7301 C1/20/10/2 Killimor 4/5 years Summer/ Winter Short Reach X 7470 C1/20/11 Killimor 4/5 years 2013 Summer/ Winter Short Reach X 7320 C1/20/11/1 Killimor 4/5 years 2009 Summer/ Winter Short Reach X 7368 C1/20/11/2 Killimor 4/5 years 2013 Summer/ Winter Short Reach X 7325 C1/20/11/3 Killimor 4/5 years Summer/ Winter Short Reach X 7351 C1/20/12 Killimor 4/5 years 2012 Summer/ Winter Short Reach X Don't maintain due to Marsh Fritillary Butterfly presence. Agreement with local NPWS. 7503 C1/20/13 Killimor - 2002 - - Channel will not be maintained in this 5 year period Don't maintain due to Marsh Fritillary Butterfly presence. Agreement with local NPWS. 7390 C1/20/13/1 Killimor - - - Channel will not be maintained in this 5 year period 7380 C1/20/14 Killimor 4/5 years 2008 Summer/ Winter Short Reach X 7397 C1/20/14/1 Killimor 4/5 years 2011 Summer/ Winter Short Reach X Don't maintain due to Marsh Fritillary Butterfly presence. Agreement with local NPWS. 7499 C1/20/15 Killimor - 1999 - - Channel will not be maintained in this 5 year period Don't maintain due to Marsh Fritillary Butterfly presence. Agreement with local NPWS. 7500 C1/20/16 Killimor - 1999 - - Channel will not be maintained in this 5 year period Don't maintain due to Marsh Fritillary Butterfly presence. Agreement with local NPWS. 7501 C1/20/17 Killimor - 2002 - - Channel will not be maintained in this 5 year period 7451 C1/20/2 Killimor 4/5 years 2012 Summer/ Winter Short Reach X 7330 C1/20/2/1 Killimor 4/5 years 2012 Summer/ Winter Short Reach X Frequency of Last Unique ID Channel_Ref Scheme Maintenance (years) Maintenance Timing of Works Machine Type A B C D E Notes 7382 C1/20/2/2 Killimor 4/5 years 2014 Summer/ Winter Short Reach X 7437 C1/20/3/1 Killimor 4/5 years 2014 Summer/ Winter Short Reach X 7309 C1/20/4 Killimor 4/5 years 1998 Summer/ Winter Short Reach X 7444 C1/20/5 Killimor 5/6 years 2009 Summer/ Winter Short Reach X Reviewed every 5/6 years. Regard must given to proximity to Tina Mines 7456 C1/20/5/1 Killimor 5/6 years 2000 Summer/ Winter Short Reach X Reviewed every 5/6 years. Regard must given to proximity to Tina Mines 0 C1/20/5/1/1 Killimor 5/6 years 1997 Summer/ Winter Short Reach X Reviewed every 5/6 years. Regard must given to proximity to Tina Mines 7405 C1/20/5/1/2 Killimor 5/6 years - Summer/ Winter Short Reach X Reviewed every 5/6 years. Regard must given to proximity to Tina Mines 7305 C1/20/5/1/2/1 Killimor 5/6 years - Summer/ Winter Short Reach X Reviewed every 5/6 years. Regard must given to proximity to Tina Mines 7405 C1/20/5/1/3 Killimor 5/6 years - Summer/ Winter Short Reach X Reviewed every 5/6 years. Regard must given to proximity to Tina Mines 7339 C1/20/5/1/4 Killimor 5/6 years 2009 Summer/ Winter Short Reach X Reviewed every 5/6 years. Regard must given to proximity to Tina Mines 7298 C1/20/5/2 Killimor 5/6 years - Summer/ Winter Short Reach X Reviewed every 5/6 years. Regard must given to proximity to Tina Mines 7393 C1/20/5/3 Killimor 5/6 years - Summer/ Winter Short Reach X Reviewed every 5/6 years. Regard must given to proximity to Tina Mines 7363 C1/20/5/3/1 Killimor 5/6 years - Summer/ Winter Short Reach X Reviewed every 5/6 years. Regard must given to proximity to Tina Mines 7322 C1/20/6 Killimor 4/5 years 2006 Summer/ Winter Short Reach X 7323 C1/20/7 Killimor 4/5 years 2006 Summer/ Winter Short Reach X 7469 C1/20/8 Killimor 4/5 years 2012 Summer/ Winter Short Reach X 7359 C1/20/8/1 Killimor 4/5 years 2010 Summer/ Winter Short Reach X 7350 C1/20/8/2 Killimor 4/5 years 2010 Summer/ Winter Short Reach X 7412 C1/20/9 Killimor 4/5 years 2014 Summer/ Winter Short Reach X 7421 C1/21 Killimor 4/5 years 2013 Summer/ Winter Short Reach X 7428 C1/22 Killimor 4/5 years 2012 Summer/ Winter Short Reach X 7454 C1/22/1 Killimor 4/5 years 2013 Summer/ Winter Short Reach X 7466 C1/22/1/1 Killimor 4/5 years Summer/ Winter Short Reach X 7458 C1/23 Killimor 5/6 years 2008 Summer Short Reach X Spawning channel 7453 C1/23/1 Killimor 5/6 years 2013 Summer Short Reach X 7440 C1/23/2 Killimor 5/6 years 2012 Summer Short Reach X 7315 C1/23/2/1 Killimor 5/6 years 2005 Summer Short Reach X 7346 C1/23/2/2 Killimor 5/6 years 2013 Summer Short Reach X 7429 C1/24 Killimor 4/5 years 2010 Summer/ Winter Short Reach X 7422 C1/24/1 Killimor 4/5 years 2012 Summer/ Winter Short Reach X 7424 C1/24/1/1 Killimor 4/5 years 2010 Summer/ Winter Short Reach X 7360 C1/24/1/2 Killimor 4/5 years 2013 Summer/ Winter Short Reach X 7465 C1/25 Killimor 4/5 years 2013 Summer Short Reach X Spawning channel 7452 C1/25/1 Killimor 4/5 years 2013 Summer Short Reach X 7416 C1/25/2 Killimor 4/5 years 2013 Summer Short Reach X 7442 C1/25/3 Killimor 4/5 years 2013 Summer Short Reach X 0 C1/25/4 Killimor 4/5 years 2011 Summer Short Reach X 7439 C1/25/4/1 Killimor 4/5 years 2011 Summer Short Reach X 7446 C1/25/5 Killimor 4/5 years 2012 Summer Short Reach X 7324 C1/26 Killimor 4/5 years 2002 Summer/ Winter Short Reach X 7327 C1/27 Killimor 4/5 years 2003 Summer/ Winter Short Reach X Section of channel maintained yearly from 7.4km to 8.2km from confluence. Lower reach 7468 C1/28 Killimor 3/4 years 2014 Summer Short Reach X important spawning channel 7310 C1/28/1 Killimor 4/5 years 2014 Summer/Winter Short Reach X 7459 C1/28/2 Killimor 4/5 years 2014 Summer/Winter Short Reach X 7316 C1/28/2/X C85/470/580 Killimor 4/5 years 2013 Summer/Winter Short Reach X 0 C1/28/3 Killimor 4/5 years 2014 Summer/Winter Short Reach X 7329 C1/28/4 Killimor 4/5 years 2007 Summer/Winter Short Reach X 7402 C1/29 Killimor 4/5 years 2014 Summer/Winter Short Reach X 7378 C1/3 Killimor 4/5 years 2012 Summer/Winter Short Reach X Frequency of Last Unique ID Channel_Ref Scheme Maintenance (years) Maintenance Timing of Works Machine Type A B C D E Notes 7356 C1/30 Killimor 4/5 years 2013 Summer/Winter Short Reach X 7431 C1/31 Killimor 4/5 years 2013 Summer/Winter Short Reach X 7364 C1/31/1 Killimor 4/5 years 2013 Summer/Winter Short Reach X 7472 C1/32 Killimor 4/5 years 2013 Summer/Winter Short Reach X 0 C1/32/1 Killimor 4/5 years 2009 Summer/Winter Short Reach X 0 C1/32/2 Killimor 4/5 years 2013 Summer/Winter Short Reach X 7306 C1/32/3 Killimor 4/5 years 2013 Summer/Winter Short Reach X 0 C1/32/3/1 Killimor 4/5 years 2013 Summer/Winter Short Reach X 7408 C1/32/4 Killimor 4/5 years 2013 Summer/Winter Short Reach X 7455 C1/33 Killimor 4/5 years 2014 Summer Short Reach X Spawning channel 7447 C1/33/1 Killimor 4/5 years 2011 Summer/ Winter Short Reach X Spawning channel 7304 C1/33/1/1 Killimor 4/5 years 2011 Summer/ Winter Short Reach X 7443 C1/33/2 Killimor 4/5 years 2014 Summer/ Winter Short Reach X 7342 C1/33/2/1 Killimor 4/5 years 2014 Summer/ Winter Short Reach X 7438 C1/33/2/2 Killimor 4/5 years 2011 Summer/ Winter Short Reach X 7374 C1/33/2/3 Killimor 4/5 years 2014 Summer/ Winter Short Reach X 0 C1/33/2/4 Killimor 4/5 years 2007 Summer/ Winter Short Reach X 7362 C1/33/2/5 Killimor 4/5 years 2011 Summer/ Winter Short Reach X 0 C1/33/3 Killimor 4/5 years 2013 Summer/ Winter Short Reach X 7427 C1/33/3 trib Killimor 4/5 years Summer/ Winter Short Reach X 7420 C1/34 Killimor 4/5 years 2010 Summer/ Winter Short Reach X 7433 C1/35 Killimor 4/5 years 2010 Summer/ Winter Short Reach X 7297 C1/35/1 Killimor 4/5 years 2010 Summer/ Winter Short Reach X 7410 C1/35/2 Killimor 4/5 years 2010 Summer/ Winter Short Reach X 7345 C1/36 Killimor 4/5 years 2013 Summer/ Winter Short Reach X 7426 C1/37 Killimor 4/5 years 2013 Summer/ Winter Short Reach X 7401 C1/37/1 Killimor 4/5 years 2013 Summer/ Winter Short Reach X 7353 C1/4 Killimor 4/5 years 2012 Summer/ Winter Short Reach X 7343 C1/5 Killimor 4/5 years 2012 Summer/ Winter Short Reach X 7395 C1/6 Killimor 4/5 years 2008 Summer/ Winter Short Reach X 7491 C1/7 Killimor 4/5 years 2012 Summer/ Winter Short Reach X Section of channel maintained yearly from 2.8km to3.2km from confluence due to flooding 7463 C1/7/1 Killimor 3/4 years 2013 Summer/ Winter Short Reach X issue 7399 C1/7AB Killimor 3/4 years 2012 Summer/ Winter Short Reach X 7335 C1/7CD Killimor 3/4 years 2009 Summer/ Winter Short Reach X 7384 C1/8 Killimor 3/4 years 2010 Summer/ Winter Short Reach X 7341 C1/9 Killimor 3/4 years 2012 Summer/ Winter Short Reach X 0 C2 Killimor 2/3 years 2013 Summer Long Reach X X Inspected every 4/5 years as channel requires little maintenance. Maintenance is generally 7441 C2/1 Killimor 4/5 years 2012 Summer/ Winter Short Reach X X tree cutting. 7464 C2/10 Killimor 6/7 years 2010 Winter Short Reach X Fast flowing, self cleaning channel 7436 C2/10/1 Killimor 6/7 years 2004 Winter Short Reach X Fast flowing, self cleaning channel 7409 C2/10/1/1 Killimor 6/7 years 2011 Winter Short Reach X Fast flowing, self cleaning channel 7418 C2/11 Killimor 4/5 years 2010 Summer/ Winter Short Reach X 7337 C2/12 Killimor 4/5 years 2013 Summer/ Winter Short Reach X 7486 C2/13 Killimor 4/5 years 2012 Summer/ Winter Short Reach X 7457 C2/13/1 Killimor 4/5 years 2012 Summer/ Winter Short Reach X 7425 C2/14 Killimor 4/5 years 2013 Summer/ Winter Short Reach X 0 C2/14/X2 Killimor 4/5 years 2013 Summer/ Winter Short Reach X 7376 C2/15 Killimor 4/5 years 2013 Summer Short Reach X Spawning channel Frequency of Last Unique ID Channel_Ref Scheme Maintenance (years) Maintenance Timing of Works Machine Type A B C D E Notes 7373 C2/16 Killimor 4/5 years 2012 Summer/ Winter Short Reach X 7490 C2/17 Killimor 6/7 years 2012 Summer Short Reach X Spawning channel – fast flowing 7435 C2/17/1 Killimor 6/7 years 2012 Summer Short Reach X Spawning channel – fast flowing 7460 C2/17/2 Killimor 6/7 years 2011 Summer Short Reach X Spawning channel – fast flowing 7415 C2/17/3 Killimor 6/7 years 2011 Summer Short Reach X Spawning channel – fast flowing 7489 C2/17/4 Killimor 6/7 years 2011 Summer Short Reach X Spawning channel – fast flowing 7302 C2/17/5 Killimor 6/7 years Summer Short Reach X Spawning channel – fast flowing 7423 C2/17/6 Killimor 6/7 years 2007 Summer Short Reach X Spawning channel – fast flowing 7340 C2/17/7 Killimor 6/7 years Summer Short Reach X Spawning channel – fast flowing Long Reach/ Upper half of channel has little maintenance requirements. Lower reach is maintained by 7473 C2/2 Killimor 5/6 years 2014 Summer Short Reach X long reach 7413 C2/2/1 Killimor 4/5 years 2011 Summer/ Winter Short Reach X 7326 C2/2/1/1 Killimor 4/5 years 2005 Summer/ Winter Short Reach X 7386 C2/2/2 Killimor 4/5 years 2013 Summer/ Winter Short Reach X 0 C2/2/2/1 Killimor 4/5 years 2013 Summer/ Winter Short Reach X 7398 C2/2/3 Killimor 4/5 years 2014 Summer/ Winter Short Reach X 7396 C2/2/4 Killimor 4/5 years 2003 Summer/ Winter Short Reach X 7334 C2/2/5 Killimor 4/5 years 2006 Summer/ Winter Short Reach X 7483 C2/3 Killimor 4/5 years 2013 Summer/ Winter Short Reach X 7361 C2/4 Killimor 4/5 years 2013 Summer/ Winter Short Reach X Section of channel maintained yearly from 1.8km to 2.2km (Abbey Village) from 7462 C2/5 Killimor 4/5 years 2014 Summer/ Winter Short Reach X confluence 7296 C2/5/1 Killimor 4/5 years 2006 Summer/ Winter Short Reach X 7485 C2/6 Killimor 4/5 years 2013 Summer/ Winter Short Reach X 7371 C2/7 Killimor 4/5 years 2013 Summer/ Winter Short Reach X 7338 C2/7/1 Killimor 4/5 years 2013 Summer/ Winter Short Reach X 7365 C2/8 Killimor 4/5 years 2013 Summer/ Winter Short Reach X 7450 C2/9 Killimor 6/7 years 2010 Summer Short Reach X Fast flowing, self cleaning channel 7332 C2/9/1 Killimor 6/7 years 2010 Summer Short Reach X Fast flowing, self cleaning channel 7407 C85/470/200 Killimor 4/5 years - Summer/ Winter Short Reach Extra drain off C1/33/1.Maintain same time as C1/33/1 7367 C85/470/269 Killimor 5/6 years - Summer Short Reach X Spawning channel 7355 C85/470/278 Killimor 4/5 years - Summer/ Winter Short Reach X Extra drain off C1/20/11 7366 C85/470/278 Killimor - 7387 C85/470/290 Killimor 4/5 years - Summer/Winter Short Reach X Extra drain off C1 7394 C85/470/294 Killimor 4/5 years - Summer/ Winter Short Reach X Extra drain off C1/24/1 Extra drain off C1/20/5/1. Reviewed every 5/6 years. Regard must given to proximity to 7411 C85/470/374 Killimor - Tina Mines 7331 C85/470/377 Killimor 5/6 years - Summer Short Reach X 7372 C85/470/547 Killimor 4/5 years - Summer/Winter Short Reach X Extra drain off C1/32 7400 C85/470/580 Killimor - Extra drain off C1/28/2 7352 C85/470/594 Killimor 4/5 years - Summer/ Winter Short Reach X Extra drain off C2 7369 C85/470/621 Killimor 4/5 years - Summer/ Winter Short Reach X Extra drain off C1/20/8 Checked yearly during embankment inspection. It is a canal channel feeding into the pump 7295 D1 Killimor 7/8 years 2009 Summer/ Winter Short Reach X house 7479 D1/1 Killimor 7/8 years Summer/ Winter Short Reach X Checked yearly during embankment inspection. 7391 D1/2 Killimor 7/8 years 2012 Summer/ Winter Short Reach X Checked yearly during embankment inspection. 7480 D1/2/1 Killimor 7/8 years 2012 Summer/ Winter Short Reach X Checked yearly during embankment inspection. 7312 D2 Killimor 7/8 years 2005 Summer/ Winter Short Reach X Checked yearly during embankment inspection. 7482 D2/1 Killimor 7/8 years Summer/ Winter Short Reach X Checked yearly during embankment inspection. 7308 D2/1/1 Killimor 7/8 years Summer/ Winter Short Reach X Checked yearly during embankment inspection. Frequency of Last Unique ID Channel_Ref Scheme Maintenance (years) Maintenance Timing of Works Machine Type A B C D E Notes 7445 E.D.Coolfin Killimor 4/5 years 2014 Summer/Winter Short Reach X Extra drain off C2/2 0 E.D.Coolfin Trib Killimor 4/5 years 2010 Summer/Winter Short Reach X 7467 E.D.Heathlawn Killimor 4/5 years 2013 Summer/Winter Short Reach X Extra drain off C1. Fish channel 0 E.D.Heathlawn Trib Killimor 4/5 years 2010 Summer/Winter Short Reach X 0 E.D.KILEEN X Killimor 4/5 years 2012 Summer/Winter Short Reach X Extra drain off C1 7347 E.D.KILEEN Y Killimor 4/5 years 2006 Summer/Winter Short Reach X Extra drain off C1 7484 E.D.Lackabaun Killimor 4/5 years 2011 Summer/Winter Short Reach X Extra drain off C2/6 7406 ED GARRYAD Killimor 4/5 years 2012 Summer/Winter Short Reach X Extra drain off C1 7475 ED LISSANARD Killimor 4/5 years 2009 Summer/Winter Short Reach X Extra drain off C1/7 7357 ED SHANGARRY 1 Killimor 4/5 years 2012 Summer/Winter Short Reach X Extra drain off C1/20 7319 ED SHANGARRY 2 Killimor 4/5 years 2012 Summer/Winter Short Reach X
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2014s1164 Killimor Natura Impact Statement v2.4 III
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2014s1164 Killimor Natura Impact Statement v2.4 IV
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