Boyle Arterial Drainage Scheme 2019-2023
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Office of Public Works Arterial Drainage Maintenance Works - Boyle Arterial Drainage Scheme 2019-2023 Stage 2: Natura Impact Statement Date: April 2019 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 V0.6 Internal review N Burke (JBA) V1.0 / 07 Dec 2018 First issue to client Tony Brew (OPW) V2.0 / 19 Dec 2018 Updates following client Tony Brew (OPW) review V3.0 / 19 Dec 2018 Updates following client Tony Brew (OPW) review V4.0 / 29 Apr 2019 Final report Tony Brew (OPW) Contract This report describes work commissioned by Office of Public Works, by a letter dated 6th June 2018. The Office of Public Works' representative for the contract was Tony Brew. William Mulville, Catherine Jones, Jennifer Pullen and Steven Heathcote of JBA Consulting carried out this work. Prepared by .................................................. William Mulville BSc (Hons), MSc Assistant Ecologist Reviewed by ................................................. Niamh Burke BSc (Hons) PhD CEnv MCIEEM Senior Ecologist Purpose This document has been prepared as a Draft 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 © Jeremy Benn Associates Limited 2019 Carbon Footprint A printed copy of the main text in this document will result in a carbon footprint of 709g if 100% post- consumer recycled paper is used and 903g 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 - Arterial Drainage Maintenance Works - Boyle Arterial Drainage i Scheme (2018- 2023) v4.0 Contents 1 Introduction ............................................................................................................ 1 1.1 Background ........................................................................................................................ 1 1.2 Legislative Context ............................................................................................................. 1 1.3 Appropriate Assessment Process ...................................................................................... 1 1.4 Methodology....................................................................................................................... 2 2 Project Description ................................................................................................. 6 2.1 Arterial Drainage Maintenance ........................................................................................... 6 2.2 Drainage Maintenance Activities ........................................................................................ 6 2.3 The Boyle Arterial Drainage Scheme ................................................................................. 13 2.4 Drainage Maintenance Works Proposed for the Boyle Arterial Drainage Scheme ............. 13 3 Screening Assessment Results ............................................................................. 19 3.1 Surface Water Pathways .................................................................................................... 19 3.2 Land & Air Pathways .......................................................................................................... 22 3.3 Groundwater Pathways ...................................................................................................... 26 3.4 Screening Assessment Conclusions .................................................................................. 29 4 Existing Environment ............................................................................................. 32 4.1 General .............................................................................................................................. 32 4.2 Ecology - Overview ............................................................................................................ 32 4.3 Ecological Walkover Survey results ................................................................................... 32 4.4 Fauna ................................................................................................................................. 44 4.5 Non-native Invasive Species .............................................................................................. 47 5 Natura 2000 sites within the Zone of Influence of the Boyle Arterial Drainage Scheme .................................................................................................................. 49 5.1 Introduction ........................................................................................................................ 49 5.2 Annaghmore Lough (Roscommon) SAC (001626)............................................................. 50 5.3 Bellanagare Bog SAC (000592) ......................................................................................... 51 5.4 Callow Bog SAC (000595) ................................................................................................. 52 5.5 Cloonshanville Bog SAC (000614) ..................................................................................... 53 5.6 Derrinea Bog SAC (000604) .............................................................................................. 54 5.7 Drumalough Bog SAC (002338)......................................................................................... 54 5.8 Mullygollan Turlough SAC (00612) .................................................................................... 55 5.9 Tullaghanrock Bog SAC (002354) ...................................................................................... 56 5.10 Urlaur Lakes SAC (001571) ............................................................................................... 57 5.11 Bellanagare Bog SPA (004105) ......................................................................................... 58 5.12 Lough Gara SPA (004048) ................................................................................................. 59 6 Appropriate Assessment........................................................................................ 60 6.1 Introduction ........................................................................................................................ 60 6.2 Identification of Potential Sources of Impact ...................................................................... 60 6.3 Impact Assessment ............................................................................................................ 63 6.4 Impact Evaluation ............................................................................................................... 66 7 Avoidance and Mitigation Measures ...................................................................... 134 7.1 Introduction ........................................................................................................................ 134 7.2 Mitigation for Bridge/Sluice/Structural Works ..................................................................... 136 8 Conclusions ........................................................................................................... 138 9 References ............................................................................................................ 141 Appendices ......................................................................................................................... I A Natura 2000 Conservation Objectives, Qualifying Interests and Site Vulnerabilities ............................................................................................................................... I 2018s0768 - Office of Public Works - Arterial Drainage Maintenance Works - Boyle Arterial Drainage Scheme (2018- 2023) v4.0 Contents B Habitat Maps ............................................................................................................................... XVI I C Protected Fauna and Flora ............................................................................................................................... XVI II D Non-native Invasive Species ............................................................................................................................... XX VI E Environmental Drainage Maintenance Guidance ............................................................................................................................... XX XII F Foreman's Bridge Inspection Report ............................................................................................................................... XX XIII G Environmental Risk Assessment Form ............................................................................................................................... XX XIV H Ecological Survey Extent ............................................................................................................................... XX XV I Channels, Embankments, Bridges and Sluices screened into assessment and pathways of impact ..............................................................................................................................