An Bord Pleanála Inspector’s Addendum Report Development: Wind farm of 61 no. turbines, 172MW output (revised from 112 no. turbines, 370MW output in the original proposal) at Oweninny, Bellacorick, Co. Mayo. Application under Section 37E of Planning & Development Act 2000 (as amended) Planning Authority: Mayo County Council Applicant: Oweninny Power Limited Type of Application: Strategic Infrastructure Development Dates of site inspection: 3rd March, 7th March,10th 11th March and 7th April 2014 and 17th February 2016. Dates of Oral Hearing: 8th to 11th, 15th to 17th and 23rd April 2014 Inspector: Dolores McCague This report is an Addendum Report and should be read in conjunction with the previous Inspector’s Report. 16.PA0029 (addendum report) An Bord Pleanala Page 1 of 113 Table of Contents Since Previous Report ................................................................................................................................ 7 1. Applicant’s Response to Request for Significant Additional Information .................................... 7 2. Notice of Significant Additional Information .................................................................................... 8 3. Site Description ................................................................................................................................... 8 4. Project Description ............................................................................................................................. 8 5. Planning History - Updates .............................................................................................................. 10 6. Significant Additional Information Received ................................................................................. 11 6.1. Revised NIS ........................................................................................................................................... 12 6.1.1. European site identification........................................................................................................... 12 6.1.2. Potential Impacts ........................................................................................................................... 13 6.1.3. Loss of, or physical disturbance to, habitats. ................................................................................ 14 6.1.4. Potential effects on peat stability includes. ................................................................................... 14 6.1.5. Potential impairment of water quality due to construction works ................................................. 14 6.1.6. Potential impairment of water quality during operation phase...................................................... 15 6.1.7. Potential impacts on hydrological functioning of flush habitats ................................................... 15 6.1.8. Potential impacts on bird species .................................................................................................. 15 6.1.9. Assessment of significance ........................................................................................................... 16 6.1.10. Bellacorick Bog Complex SAC .................................................................................................... 16 6.1.11. River Moy SAC ............................................................................................................................ 16 6.1.12. Bellacorick Iron Flush SAC .......................................................................................................... 17 6.1.13. Lough Dahybaun SAC .................................................................................................................. 17 6.1.14. Carrowmore Lake SAC ................................................................................................................. 17 6.1.15. Owenduff/Nephin Complex SAC ................................................................................................. 17 6.1.16. Broadhaven Bay SAC ................................................................................................................... 17 6.1.17. Slieve Fyagh Bog SAC ................................................................................................................. 18 6.1.18. Glenamoy Bog Complex SAC ...................................................................................................... 18 16.PA0029 (addendum report) An Bord Pleanala Page 2 of 113 6.1.19. Owenduff/Nephin Complex SPA .................................................................................................. 18 6.1.20. Lough Conn & Lough Cullin SPA, ............................................................................................... 18 6.1.21. Carrowmore Lake SPA ................................................................................................................. 18 6.1.22. Blacksod Bay / Broadhaven Bay SPA .......................................................................................... 19 6.1.23. Conclusion of Screening ............................................................................................................... 19 6.1.24. Appropriate Assessment ............................................................................................................... 19 6.1.25. Bellacorick Bog Complex SAC .................................................................................................... 19 6.1.26. Bellacorick Iron Flush SAC, ......................................................................................................... 20 6.1.27. Carrowmore Lake SAC ................................................................................................................. 21 6.1.28. River Moy SAC ............................................................................................................................ 21 6.1.29. Potential Impacts: .......................................................................................................................... 22 6.1.30. Bellacorick Bog Complex SAC .................................................................................................... 22 6.1.31. Bellacorick Iron Flush SAC .......................................................................................................... 22 6.1.32. Carrowmore Lake SAC ................................................................................................................. 23 6.1.33. River Moy SAC ............................................................................................................................ 23 6.1.34. Mitigation Measures ..................................................................................................................... 23 6.1.35. Peat Stability ................................................................................................................................. 23 6.1.36. Measures to maintain water quality .............................................................................................. 24 6.1.37. Measures specific for Bellacorick Iron Flush SAC. ...................................................................... 25 6.1.38. Formoyle Flush ............................................................................................................................. 26 6.1.39. Borrow Pit ..................................................................................................................................... 26 6.1.40. Operation phase mitigation ........................................................................................................... 27 6.1.41. Residual impacts following mitigation ......................................................................................... 27 6.1.1. In-combination effects: ................................................................................................................. 27 6.1.2. Potential future development of Oweninny phase 3 ..................................................................... 28 6.1.3. Other Wind Farms ......................................................................................................................... 28 6.1.4. Meteorological Mast ..................................................................................................................... 30 16.PA0029 (addendum report) An Bord Pleanala Page 3 of 113 6.1.5. Power Lines .................................................................................................................................. 30 6.1.6. Substation ...................................................................................................................................... 30 6.1.7. Grid 25/ Grid West ........................................................................................................................ 30 6.1.8. Conclusion .................................................................................................................................... 32 6.2. Revised EIS ........................................................................................................................................... 33 6.2.1. EIS Format .................................................................................................................................... 33 6.2.2. Human beings ............................................................................................................................... 35 6.2.3. Terrestrial