Chapter 07: Ecology & Woodlands Table 7.7a: Predicted Unmitigated Effects on Fauna Table of Contents Table of Figures Due to Pollution During Construction & Decommissioning 7.1 Introduction Figure 7.1 Study Area & Designations Table 7.7b: Predicted Unmitigated Effects on Birds 7.2 Scoping & Consultations Figure 7.2 Constraints Plan Due to Pollution During Construction & 7.3 Assessment Methodology & Significance Criteria Decommissioning 7.4 Baseline List of Tables Table 7.8: Predicted Unmitigated Effects on Habitats & Flora During Operational & Maintenance 7.5 Project Description & Mitigation Strategy Table 7.1: Nature Conservation Importance Levels Activities 7.6 Assessment of Effects Table 7.2: Thresholds of Magnitude Table 7.9: Predicted Unmitigated Effects on Habitats & 7.7 Detailed Mitigation Measure & the Identification of Flora Due to Pollution During Operational & Table 7.3: Table Indicating the Determination of Residual Effects Maintenance Activities Significance 7.8 Summary Table 7.10a:Predicted Unmitigated Effects on Fauna Table 7.4: Predicted Unmitigated Effects on During Operational & Maintenance Activities Habitats & Flora During Construction & Decommissioning Table 7.10b:Predicted Unmitigated Effects on Birds During Operational & Maintenance Activities Table 7.5: Predicted Unmitigated Effects on Habitats & Flora Due to Pollution During Table 7.11a:Predicted Unmitigated Effects on Fauna Construction & Decommissioning Due to Pollution Risk During Operational & Maintenance Activities Table 7.6a: Predicted Unmitigated Effects on Fauna During Construction & Decommissioning Table 7.11b:Predicted Unmitigated Effects on Birds Due to Pollution Risk During Operational & Table 7.6b: Predicted Unmitigated Effects on Birds Maintenance Activities During Construction & Decommissioning Table 7.12 Summary of Mitigation New 132kV Overhead Line Connection from Llandinam Wind Farm to Welshpool Substation ecology & woodlands 7.2.6 The Scoping Report stated that the following direct and indirect effects would be 7.1 Introduction assessed: 7.1.1 This section describes the findings of two assessments carried out for the ¤ Habitat loss/change proposed overhead line. The first relates to the ecological assessment, which ¤ Habitat fragmentation includes assessment of protected species and habitats, including woodlands ¤ Disturbance/damage to wildlife and hedgerows (and includes reference to commercial plantations). The second assessment, a tree survey, covers smaller groups and individual trees affected ¤ Effect on water quality by the proposals. 7.2.7 The Scoping Report explained that a 100m corridor Phase 1 habitat survey 7.1.2 The assessments cover the life of the overhead line, including construction, would be carried out and that reference would be made to construction effects, operation and decommissioning as set out in Chapter 4.0: Project Description. including construction traffic. Where significant adverse ecological impacts or effects are identified, the assessment proposes mitigation measures to prevent, reduce, or offset them and 7.2.8 To ensure that the assessment was as well informed as possible and that then re-assesses the residual effects remaining after mitigation. The most likely the concerns and interests of stakeholders were taken into consideration, significant effects on protected species and habitat are likely to occur during the considerable consultation was undertaken throughout the development of the construction stage with possibly some effects during operation, through access scheme. and maintenance requirements. The effects of decommissioning are described together with those of the construction phase as the latter necessitates similar 7.2.9 A Consultation Report describing the Preferred Route was sent out to statutory activities and potential effects. bodies, landowners and interested parties in July 2008. A copy of this document is included at Appendix C. This was followed by three rounds of public exhibitions 7.1.3 The ecology assessment also includes proposals for environmental measures to in July/August 2008, December 2008 & April 2009. At the end of the consultations, enhance habitats. The same applies to the trees assessment, although in this an initial Proposed Route was identified, which was then subject to three months case this also includes reference to tree planting. of detailed design and refinement between May - July 2009 at which point it became the final Proposed Route, which is the subject of this ES. Throughout 7.1.4 The proposed 132kV overhead line connection, comprises 35km of new this period, dialogue continued with the relevant consultees, including members overhead line on approximately 394 wood pole supports between the new Bryn of the public and affected landowners. Further detail regarding the scoping and Dadlau and the existing Welshpool substations. To provide scope for adjusting consultation process is provided in Chapter 2.0: EIA Methodology & Significance the precise alignment of the overhead line through subsequent detailed design Criteria and in SP Manweb’s (SPEN) August 2009 document, Feedback Report stages, the overhead line is sited within a 100m wide corridor. of Scoping Reponses and Pre-Application Public Consultation Responses, a copy of which is included at Appendix B. 7.1.5 The ecological assessment was undertaken by Jane Walsh Ecological Consultant. 7.2.10 The project generated a high level of interest and, whilst over half the comments 7.1.6 The tree survey work was carried out by ProArb Ltd in June 2009. related either directly or indirectly to concerns about impact on the landscape or on views, there were some concerns relating to impact on ecology and nature conservation interests. Surveys 7.1.7 The initial walkover survey was undertaken in August 2008 following selection 7.2.11 In response to the scoping, the Welsh Assembly Government requested that the of a Preferred Route. As discussed in the following sections, because further assessment must include impacts on commercial plantations, bird collisions, amendments were made to the Preferred Route as it evolved into the Proposed and pollution risks to watercourses in the construction stages. No other issues Route, an extended Phase 1 Survey was then undertaken in June, July and were raised through the consultation stages. August 2009 to update the original (2008) Phase 1 Report. 7.2.12 CCW in its response dated 6 August 2008 advised that sufficient information 7.1.8 Consultations with the Powys County Ecologist in June 2009 revealed concerns be provided in terms of European sites to enable the project to be properly regarding the possible presence of dormice within woodlands and hedges in the assessed in the context of these sites. For this project, these include two Special study area. These consultations led to the introduction of a dormouse survey Areas of Conservation (SACs) and these are the Montgomery Canal and the using nest tubes. Owing to the late introduction of the survey within the project River Wye, including one of its tributaries the River Ithon. The Montgomery Canal schedule, the tubes will be left in-situ through to the 2010 survey season in order lies approximately 1.2km to the west of the corridor at its closest point. The to gain one full season survey data. River Wye lies 1.5km south of the survey corridor at Camnan Bridge. The CCW response also suggests the requirement for NVC surveys where appropriate and a number of protected species surveys including bats, badgers, reptiles, otters 7.2 Scoping and Consultations and water voles and great crested newts. The full CCW response is detailed in Appendix H. 7.2.1 In order to determine the content of the ES, a Scoping Report was submitted to the Department of Energy and Climate Change (DECC). A copy of this document 7.2.13 As agreed with CCW, because the construction of the overhead line is predicated is included at Appendix A. on the re-powering and extension of the Llandinam wind farm, the baseline conditions for this ES assume the presence of this wind farm. 7.2.2 The Scoping Report noted that there are 21 Sites of Special Scientific Interest (SSSIs) present within the study area. 7.2.14 The points and comments raised by consultees both in response to the scoping exercise and to the consultations, which formed part of the route selection 7.2.3 There are six statutory protected sites within 2km of the overhead line: process were incorporated into the assessment where appropriate. ¤ Gwaun Bryn (Bryn Pasture) SSSI - located 1.2km north of Leighton, Cumulative Effects near Welshpool 7.2.15 For the purposes of this ES, cumulative ecological effects are considered ¤ Kingswood Meadow SSSI - 1.2km to east near Forden to result from additional changes caused by the proposed overhead line in ¤ Montgomery Canal SSSI/SAC - located 1.2km to west (at its combination with other existing or proposed overhead lines in the area. This closest point) potentially includes the network connections of the Llanbadarn Fynydd, Garreg ¤ River Teme SSSI - 1.2km to south Lwyd and Llaithddu wind farms. Although these are (November 2009) the ¤ Gweurnydd Camnan SSSI - 1km to south subject of planning applications, there is currently insufficient information in the public domain regarding their connections to include them in the cumulative ¤ Gweunydd Esgairdraenllwyn SSSI & River Wye SAC - 1.5km to assessment. south of the survey corridor 7.2.4 The Afon Ithon SSSI, Afon Wye SAC is located greater than 2km away, south of Sources of Information and Guidance the route corridor. The River Ithon lies inside the survey corridor near Blackgate, 7.2.16 Relevant ecological survey and environmental impact assessment guidance however this is approximately 3km upstream from the SSSI/SAC, between includes: proposed poles 319 and 320. ¤ JNCC (1993) Handbook for Phase 1 Habitat Survey – a technique for 7.2.5 Montgomery Wildlife Trust Reserves located close to the overhead line include: environmental audit. England Field Unit, Nature Conservancy Council. ¤ Institute of Ecology and Environmental Management (2006) Guidelines ¤ Llyn Coed y Dinas - 1km to west (SJ223052) for Ecological Impact Assessment in the United Kingdom (version 7 July ¤ Dolydd Hafren - 1.5km to west (SJ198005) 2006).