JBA Consulting Report Template 2015
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Office of Public Works Arterial Drainage Maintenance Works - Brosna Arterial Drainage Scheme 2019-2023 Stage 2: Natura Impact Statement December 2018 Office of Public Works Templemungret House Mungret Co. Limerick JBA Project Manager Tom Sampson 24 Grove Island Corbally Limerick Ireland Revision History Revision Ref / Date Issued Amendments Issued to V0.4 18 Dec 2018 Technical Review Niamh Burke (JBA) V1.0 19 Dec 2018 First issue to client Tony Brew (OPW) Contract This report describes work commissioned by the Office of Public Works, by a letter dated 6 June 2018. The Office of Public Works’ representative for the contract was Tony Brew. Patricia Byrne, William Mulville and Hannah Mulcahy of JBA Consulting carried out this work. Prepared by .................................................. Patricia Byrne BSc (Hons) PhD MCIEEM Ecologist William Mulville BSc MSc Assistant Ecologist Hannah Mulcahy BSc (Hons) MSc Assistant Ecologist Tanya Slattery BSc MSc MSc (Res) Ecologist Reviewed by ................................................. Niamh Burke BSc (Hons) PhD CEnv MCIEEM Senior Ecologist Purpose This document has been prepared as a Final Report for Office of Public Works. 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 Office of Public Works. Copyright © JBA Consulting Ireland 2018 Carbon Footprint A printed copy of the main text in this document will result in a carbon footprint of 627g if 100% post- consumer recycled paper is used and 798g 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. 2018s0768 Office of Public Works NIS Brosna v1.0 i Contents 1 Introduction ............................................................................................................ 4 1.1 Background ........................................................................................................................ 4 1.2 Legislative context .............................................................................................................. 4 1.3 Appropriate Assessment Process ...................................................................................... 4 1.4 Methodology....................................................................................................................... 5 2 Project Description ................................................................................................. 10 2.1 Arterial Drainage Maintenance ........................................................................................... 10 2.2 Drainage Maintenance Activities ........................................................................................ 10 2.3 The Arterial Drainage Scheme .......................................................................................... 16 2.4 Drainage Maintenance Works Proposed for the Brosna Arterial Drainage Scheme .......... 17 3 Screening Assessment Results ............................................................................. 18 4 Existing Environment ............................................................................................. 32 4.1 General .............................................................................................................................. 32 4.2 Ecology - Overview ............................................................................................................ 32 4.3 Ecological Walkover Survey Results .................................................................................. 32 4.4 Flora ................................................................................................................................... 44 4.5 Fauna ................................................................................................................................. 45 4.6 Non-native Invasive Species .............................................................................................. 47 5 Natura 2000 sites within the Zone of Influence of the works/scheme ................... 49 5.1 Introduction ........................................................................................................................ 49 5.2 Clonaslee Eskers And Derry Bog SAC (000859) ............................................................... 50 5.3 Lough Owel SAC (000688) ................................................................................................ 51 5.4 Lough Owel SPA (004047) ................................................................................................ 51 5.5 Middle Shannon Callows SPA (004096) ............................................................................ 52 5.6 River Shannon Callows SAC (000216) .............................................................................. 53 5.7 Clara Bog SAC (000572) ................................................................................................... 54 5.8 Split Hills and Long Hill Esker SAC (001831) ..................................................................... 55 5.9 Charleville Wood SAC (000571) ........................................................................................ 56 5.10 Lough Ennell SAC (000685) .............................................................................................. 56 5.11 Lough Ennell SPA (004044) ............................................................................................... 57 5.12 Ferbane Bog SAC (000575) ............................................................................................... 58 5.13 Moyclare Bog SAC (000581) ............................................................................................. 58 6 Appropriate Assessment........................................................................................ 60 6.1 Introduction ........................................................................................................................ 60 6.2 Identification of Potential Sources of Impact ...................................................................... 60 6.3 Impact Assessment ............................................................................................................ 65 6.4 Impact Evaluation ............................................................................................................... 69 7 Avoidance and Mitigation Measures ...................................................................... 102 7.1 Site specific mitigation measures ....................................................................................... 102 7.2 Mitigation for Bridge/Sluice/Structural Works ..................................................................... 103 8 Conclusions ........................................................................................................... 105 References.......................................................................................................................... I Appendices ......................................................................................................................... IV A Natura 2000 Conservation Objectives and Vulnerabilities .................................... IV B Protected Flora and Fauna ............................................................................................................................... XXI II C Appendix - Non-native Invasive Species ............................................................................................................................... XX XII 2018s0768 Office of Public Works NIS Brosna v1.0 Contents D Environmental Drainage Maintenance Manual ............................................................................................................................... XX XIV E Foreman’s Bridge Inspection Report ............................................................................................................................... XX XV F Environmental Risk Assessment Form ............................................................................................................................... XX XVI G Ecological Survey Extent ............................................................................................................................... XX XVII H Channels, Embankments, Bridges and Sluices screened into assessment and pathways of impact ............................................................................................................................... XX XVIII 2018s0768 Office of Public Works NIS Brosna v1.0 List of Figures Figure 1-1: The Appropriate Assessment Process (from: Appropriate Assessment of Plans and Projects in Ireland - Guidance for Planning Authorities, DoEHLG, 2009).. 4 Figure 1-2: Screening assessment process ...................................................................... 7 Figure 2-1: Extent of Brosna Arterial Drainage Scheme .................................................... 16 Figure 3-1 Channels with potential impacts via surface water pathways. .......................... 19 Figure 3-2 Channels with potential impacts via Land and air pathways ............................ 22 Figure 3-3 Channels potentially impacted via groundwater pathways ............................... 25 Figure 4-1 : FL4 - Lough Ennell .........................................................................................