Appendix 2.2 - Mid Wales Conjoined Wind Farm Inquiry – Grid Session 4 Evidence Supplementary Environmental Information on Grid Scenarios

Llanbrynmair Wind Farm Supplementary Environmental Information

APPENDIX 2.2 - MID WALES CONJOINED WIND FARM INQUIRY – GRID SESSION 4 EVIDENCE SUPPLEMENTARY ENVIRONMENTAL INFORMATION ON GRID SCENARIOS

Volume 2

Mid Wales Conjoined Wind Farm Inquiry - Grid Session 4 Evidence

Supplementary Environmental Information on Grid Connection Scenarios

Final Report

Prepared by LUC on behalf of Vattenfall, Fferm Wynt Llaithddu Cyf (FWL), RES UK & Ireland Limited (RES') and RWE Npower Renewables Limited (RWE)

December 2013

Planning & EIA LUC BRISTOL Offices also in: Land Use Consultants Ltd Registered in England Design 14 Great George Street London Registered number: 2549296 Landscape Planning Bristol BS1 5RH Glasgow Registered Office: Landscape Management Tel:0117 929 1997 Edinburgh 43 Chalton Street Ecology Fax:0117 929 1998 London NW1 1JD LUC uses 100% recycled paper Mapping & Visualisation [email protected] FS 566056

EMS 566057

Project Title : Mid Wales Conjoined Wind Farm Inquiry - Grid Session 4 Evidence , Supplementary Environmental Information on Grid Scenarios

Client : Vattenfall, FWL, RES and RWE

Version Date Version Details Prepared by Checked by Approved by Principal

V1 18/12/2013 Draft Report Sarah Young Kate Wigley Marc van and Ben Miller Grieken

V1_1 18/12/2013 Amended Draft Report Sarah Young Kate Wigley and Ben Miller

V2 23/12/2013 Final Report Sarah Young

\\Glfp01\56 jobs and above\59\5920 Mid Wales Grid Review\B Project Working\Mid Wales Grid Session 4 Evidence_20121223_V2.docx

Contents

Overview of the Assessment 1 Background 1 Grid Connection Options Scenarios 2 Assessment of Environmental Impacts and Limitations 4 Summary of Environmental Information 5

Figures

Figure 1: Grid Connection Scenario 1 Figure 2: Grid Connection Scenario 2 Figure 3: Grid Connection Scenario 3 Figure 4: Grid Connection Scenario 4 Figure 5: Grid Connection Scenario 5 Figure 6: Grid Connection Scenario 6 Figure 7: Grid Connection Scenario 7 Figure 8: Grid Connection Scenario 8a Figure 9: Grid Connection Scenario 8b

Appendices

Appendix 1: Summary of Environmental Information on Grid Scenarios

Overview of the Assessment

Background

1.1 Vattenfall, Fferm Wynt Llaithddu Cyf (FWL), RES UK & Ireland Limited (RES') and RWE Npower Renewables Limited (RWE) (herein referred to as ‘the developers’) have submitted Section 36 applications under the Electricity Act 1989 for consent to construct and operate wind farms in the Mid Wales Strategic Search Areas (SSA) B & C. 1.2 Each of the developers has an agreement with SP Manweb (SPM) for provision of a grid connection into the existing electricity grid network. SPM’s current proposals are to connect the wind farms via overhead line connections to a proposed new 400kV grid substation being proposed by National Grid near Cefn Coch. The SPM proposal is known as the SP Manweb Mid Wales Grid Connections Project (MWC) and also incorporates grid connection requirements for a further four Windfarms 1. In total SPM has eight ‘contracted schemes’. From Cefn Coch, National Grid is proposing to construct a new 400kV in part overhead and part underground cable connection to the existing electricity network near to Lower Frankton, approximately 40km North East from Cefn Coch. 1.3 In addition to the developers’ applications, an application has also been made under section 36 by Celtpower Limited ("Celtpower") for consent to construct and operate a wind turbine generating station at Llandinam in Powys, Mid Wales. This is a repowering of an existing wind farm. It is not proposed that this generating station will connect to the new 400kV substation at Cefn Coch. Instead it will export electricity via a new 132 KV overhead line connection to the existing Welshpool substation. An application has been made by SPM under section 37 of the Electricity Act 1989 to install this new line. 1.4 A summary of the proposed wind farm schemes to which this review relates are set out in Table 1 below:

Table 1: S36 Wind Farm Proposals in SSA B and SSA C

SSA Wind farm Developer Mega Watt Mega Watt Capacity Capacity (Application) (Contracted Capacity to DNO) SSA B Llanbrynmair RES 90 90

Carnedd Wen RWE 150 150

SSA C Llaithddu Fferm Wynt Llaithddu Cyf 62.1 80

Llanbadarn Fynydd Vattenfall 59.5 61.2

Llandinam repowering Celt Power Ltd. 102 90

1.5 Table 1 sets out both the capacities (in terms of megawatt) that the ‘developers’ have submitted S36 applications for, and the contracted capacities with the Distribution Network Operator (DNO), in this case is SPM. The wind farm options used in this report are based upon the application capacity . However should different wind farm options be based upon the contracted capacities to the DNO, these would not alter the basic infrastructure elements required for each grid option scenario.

1 The four wind farms include: Dyfnant Forest, which is at pre-application stage and is expected to be submitted to the Planning Inspectorate in 2014; Rhyd Ddu, which will be part of the Mynydd Lluest y Graig application and is at pre-planning stage and is expected to be submitted in 2014; Carno III was submitted in July 2010 and a decision is pending; and Neuadd Goch Bank was submitted in January 2012 and is still in the planning process.

Mid Wales Grid Session 4 Evidence 1 December 2013

1.6 All six applications (i.e. the five wind farms and the Llandinam grid connection) are currently the subject of a conjoined public inquiry. The main parties at the inquiry include: Powys County Council, Natural Resources for Wales, Fferm Wynt Llaithddu Cyf, Vattenfall, RES, RWE, Celt Power, SPM and various local action/ interest groups. Questions have been asked in the Inquiry by the Inspector and the Alliance regarding the need for, and environmental effects of, the proposed Mid Wales Grid Connection. 1.7 As the MWC Project necessarily identifies grid connection options taking account of all eight contracted schemes, it is likely that if less than five of the wind farms listed in Table 1 above, were to be granted approval, the grid connection options would be different to that proposed by SPM in the MWC Project. On this basis, to inform the Inquiry on the potential environmental implications of the different grid connection scenarios associated with the developments in SSA B and SSA C, ‘the developers’ have commissioned LUC and Mott MacDonald to prepare Supplementary Environmental Information. This comprises: • A technical assessment of the various options available for connecting the proposed wind farms to the grid and the (grid) connection infrastructure that this may require. This is set out in the accompanying Connections Options Review Report (December 2013) prepared by Mott MacDonald. • A high level desk based assessment of the environmental effects of the various grid options (as set out in the accompanying Connections Options Review Report). 1.8 This report sets out the findings of the high level assessment of environmental effects of the possible alternative grid connection options.

1.9 It should be highlighted that the ‘baseline’ situation for the potential grid connection scenario within Mid Wales, comprises that being currently proposed by SPM as their SP Mid Wales Connections Project. This is on the basis that, in accordance with the Electricity Act 1989, SPM plc, the licence holder for the electricity network at 132kilovolt (kV) and below in Mid Wales, has agreed terms to provide connections for eight wind farms in Mid Wales to the electricity network. As licence holder, SPM is required under the Electricity Act 1989 to identify electrical connections that meet the technical requirements of the electricity network and cause, on balance, the least disturbance to the environment and the people who live, work and recreate within it.

1.10 As four of the five wind farms which are involved in the conjoined inquiry (Llanbrynmair, Carnedd Wen, Llaithddu and Llanbadarn Fynydd), are also contracted with SPM, and therefore represented by the SP Mid Wales Connections Project, the findings of the ongoing routeing work being undertaken by SPM are therefore considered to represent the baseline situation for the grid connection scenario. 1.11 The alternative scenarios considered within this study, as requested by the Inspector, are therefore hypothetical, and are being considered to inform the inquiry as to the possible situation should the contracted SP Mid Wales Connections Project not proceed in its current form.

Grid Connection Options Scenarios

1.12 The accompanying Connections Options Review Report (December 2013) identifies eight grid connection option scenarios, as set out in Table 2 below and in Figures 1-9. Please refer to the Connections Options Review Report for a detailed justification of why the scenarios were selected for review. The scenarios are based on potential circuit loadings but for added clarity, a summary of the potential wind farm options that could be accommodated by each scenario has been included in Table 2 . A summary of the proposed grid solution is also provided, along with an approximation of the potential length of the grid route.

Mid Wales Grid Session 4 Evidence 2 December 2013

Table 2: Summary of Grid Connection Scenarios Assessed

No Scenario Wind Farm(s) options Grid Solution Approximate that could be connected Length of Route

(SSA C) (SSA (SSA B) (SSA B) (SSA (SAA C) (SAA Llaithddu Llaithddu Llandinam Llandinam Llanbrynmair Llanbrynmair Carnedd Wen Wen Carnedd Llanbadarn Fynydd Fynydd Llanbadarn repowering (SSA C) (SSA repowering

1 Up to 160 MW (one 132 kV HDWP line from SSA C to 114km or two wind farms) connect to the SP Manweb network in SSA C; no wind at Welshpool. Requires significant farms in SSA B SP Manweb reinforcements north of Welshpool 2 Over 160 MW (all Connection to Welshpool, as 141km three wind farms) in outlined in option 1, plus a 132 kV SSA C; no wind HDWP connection to Shrewsbury farms in SSA B 2 3 Over 160 MW (all Connection to Welshpool, as 216km three wind farms) in outlined in option 1, plus a 132 kV SSA C; at least one HDWP from SSA C to SSA B. This wind farm in Area assumes there must be (at least) B3 one circuit to Legacy. 4 Up to 160 MW (one 132 kV HDWP circuit to Welshpool 32km wind farm) in SSA from SSA B B; no wind farms in SSA C 5 Up to 117.8 MW or 132 kV HDWP circuit (124 MVA or 186km 167.2 MW (one wind 176 MVA) to Legacy from SSA B, farm) in SSA B; two plus connection option 1 wind farms in SSA C of up to a total of 4 160 MW 6 Up to 97.2 MW 132 kV HDWP circuit (176 MVA) to 215km (Llanbrynmair) in Legacy from SSA B, plus SSA B; all three connection option 1, plus 132 kV wind farms in SSA C HDWP between SSA B and SSA C 7 Both wind farms in 2 x 132 kV HDWP circuits to 251km SSA B; up to 160 Legacy from SSA B, plus MW (two wind connection option 1 farms) in SSA C 5 8a All five wind farms Any 2 x 132 kV circuits (2 x HDWP or 281km contribution an L4 tower line) to Legacy from from SSA C or SSA B, plus a 132 kV circuit SSA D between SSA B and SSA C, plus connection option 1 8b All five wind farms Any National Grid 400kv circuit to 199km contribution Lower Frankton from National Grid from SSA C or 400kV substation at Cefn Coch, SSA D plus a 132 kV circuit between SSA B and SSA C, plus option 1

2 Two wind farms in SSA C may also exceed 160MW if one includes Llandinam. Whilst constraining generation at times of minimum loading may be the more likely solution, the potential for two wind farms in SSA C to be connected using this grid solution cannot be ruled out. 3 Two wind farms in SSA C may also exceed 160MW if one includes Llandinam. Whilst constraining generation at times of minimum loading may be the more likely solution, the potential for two wind farms in SSA C to be connected using this grid solution cannot be ruled out. 4 Connections including Llandinam and Llanbadarn in this scenario only fall within the capacity limits if the DNO capacities are used. 5 The connection including Llandinam and Llanbadarn in this scenario only falls within the capacity limits if the DNO capacities are used.

Mid Wales Grid Session 4 Evidence 3 December 2013

Assessment of Environmental Effects and Study Limitations

1.13 As requested by the Inspector, a high level review of existing environmental information has been undertaken. The assessment of effects has necessarily been based on a desk study of existing published environmental information with regards to known potential grid route options. The following published environmental information has been used in the preparation of this report: • SP MANWEB (Sept 2013). SP Mid Wales Connections, Line Routing Methodology & Appraisal - Phase 3 Report. • SP MANWEB (Oct 2013). Volume 1: New 132kV Overhead Line Connection from Llandinam Wind Farm to Welshpool Substation - Updated Environmental Statement. • National Grid (Sept 2013). Mid Wales Connection Project, Draft Substation Site Report. • National Grid (Sept 2013). Mid Wales Connection Project, Draft Route Report.

Limitations 1.14 There are no existing studies that have been undertaken looking at a potential grid connection route from Cefn Coch to Legacy, or from SSA C to Shrewsbury. Scenarios 2 outlined in Table 2 above requires a grid route connection to Shrewsbury and Scenarios 3, 4, 5, 6 and 7 (see Table 2) all require part of their grid connection to link to Legacy. As no information is available on these sections of routes, this limits the ability to draw conclusions with respect of the likely environmental effects of grid connections along these sections. 1.15 The four main publications used (see para 1.13) also vary considerably in the level of information they contain. The SPM and National grid studies provide a high level assessment of the potential environmental issues associated with these routes, whereas the Llandinam to Welshpool grid Connection ES comprises the findings of a detailed Environmental Impact Assessment. Care has been taken to try to provide comparable information in Appendix 1, Tables B to J . 1.16 The required number of connections from the wind farms to the wider grid network will also vary depending on which wind farms are consented or not. For example under Scenario 1, it will not be necessary to construct a grid connection from Llaithddu to the Llandinam route if it is not approved. The summary of environmental information for each scenario therefore presents a maximum effect scenario – assuming that Llaithddu and Llanbadarn Fynydd are both constructed. 1.17 The proposed routes from the wind farms identified by SPM in the MWC Project were all aimed at connecting up with the substation at Cefn Coch. If Llanbadarn Fynydd was to use the proposed Llandinam grid connection route instead of Cefn Coch, it is likely that this would take a more direct route than that proposed by the MWC Project. No environmental information is however available on the more direct route and therefore only the MWC project routes have been considered in this assessment. Individual developers with extensive knowledge of the constraints and receptors pertaining to their own schemes may be in a better position to attempt assessments of hypothetical connections not covered by the scope of this study.

1.18 It should also be noted that line route sections CC2, CC3 and CC4 in SSA C, as identified by SPM in the MWC Project, are relatively short connections, with limited associated environmental constraints and have therefore been summarised within CC1 line route Section 1’s environmental information in the MWC Project Phase 3 Report. This approach has been maintained in the environmental information presented in Tables B – J (Appendix 1 ) for any Scenario identified in Table 2 which includes a wind farm in SSA C. However, for clarity, the line routes for the scenarios are shown as commencing from the relevant wind farm substations on the respective maps ( Figures 1 – 9).

Mid Wales Grid Session 4 Evidence 4 December 2013

Summary of Environmental Effects

1.19 The tables set out in Appendix 1 provide a summary of the environmental information that is available for identified scenarios. Table A in Appendix 1 sets out the publications that have been used to assess the environmental effects of each scenario. Tables B- J (Appendix 1) set out in detail the potential environmental issues for each scenario under the following topic headings: • Air Quality and Emissions (incl. dust). • Ecology/Biodiversity and Geological Conservation. • Climate Change. • Electric and Magnetic Fields. • Forestry and Woodland. • Geology and Soils. • Historic Environment. • Land Use. • Landscape and Visual Amenity. • Lighting. • Noise and Vibration. • Socio Economics (including Tourism and Recreation). • Traffic and Transport. • Waste Management. • Water Environment.

1.20 The information for each section of the route or substation is presented (where available) along with an overall summary of the key environmental issues for the topic in question. Please note that this summary does not constitute an assessment of the cumulative impacts of the scenario, as that requires a level of information and assessment that is not available for this study.

1.21 Tables 3-6 below set out the key environmental effects that have been identified for each scenario as drawn from the summary columns in Tables B-J in Appendix 1.

1.22 The same summaries of environmental effects are presented for some scenarios, for the following reasons:

• Scenarios 1 and 2 both include the Llandinam route to Welshpool. Scenario 2 also requires a 132kV connection to Shrewsbury but there is no environmental information available for this connection. • Scenarios 3, 6 and 8a all require the Llandinam connection to Welshpool, a 132 kV HDWP from SSA C to SSA B and (at least) one circuit to Legacy. 8a requires 2 x 132 kV circuits to Legacy. No environmental information is available for the route to Legacy.

• Scenario 5 requires the Llandinam connection to Welshpool and one circuit 132kV HDWP circuit to Legacy from SSA B. Scenario 7 is the same but it requires 2 x 132 kV HDWP circuits to Legacy. No environmental l information is available for the route to Legacy. • No assessment of the environmental effects for Scenario 4 has been provided as there is no identified route or environmental information for a connection from SSA B to Welshpool.

1.23 Where topics (such as air quality) have been scoped out of the assessments contained in the relevant publications, they are not included in the tables below.

Mid Wales Grid Session 4 Evidence 5 December 2013

Table 3: Summary of Effects for Scenarios 1 and 2 - Llandinam connection to Welshpool Note: The following table does not include any environmental information for the effects of constructing a 132kV line to Shrewsbury which would be required for Scenario 2.

Topic Summary of Environmental Effects

Ecology/Biodiversity and Birds: There is potential for birds particularly larger species (such as Geological Conservation swans) to collide with the overhead lines. This represents a long-term, permanent hazard to certain groups of birds but the use of bird deflectors is likely to help to reduce this risk.

Designated Sites: The proposed routes to Llandinam and the Man Web Collector Station do not cross any nature conservation designations. Several sites do however lie within close proximity to the route.

Peatland: The route will pass through areas identified as having potential peatland habitats.

Habitat Management Plans: Due to the location of the wind farm substations, the routes will pass through a wind farm HMP area. Protected Species: Protected species are likely to be located in proximity to the routes. However full compliance with relevant protected species legislation is likely to help to minimise any effects.

Forestry and Woodland Some trees and hedgerows will be lost to facilitate construction of the grid connection routes. The loss of trees may result in potential habitat loss for bats, although this is expected to be a localised effect.

In some locations, mature trees as well as Ancient and Semi-Natural woodland may be affected by construction of the proposed routes. Although this will be avoided where possible at the detailed design stage, limited felling may be required in some locations.

Historic Environment The Llandinam Route is the only route corridor that has designated historic assets within it, as two SAMs are located within the route. The Llandinam Route and other routes included in this scenario pass within 1-2km of other historic assets, including: SAMs, Conservation Areas, Listed Buildings (primarily lower grade II but also including higher grade), registered historic landscapes , registered historic parks and gardens, and undesignated below-ground sites/features. Assuming that mitigation measures are successfully implemented, long-term direct impacts on cultural heritage are not expected to be significant.

There may be significant visual impacts on the setting of some historic assets such as Crugyn Bank Dyke and Bryn Cwmyrhiwdre Round Barrow.

Only the Llandinam route passes through a Registered Historic Landscape resulting in significant effects.

Landscape and Landscape and visual effects are likely to arise along the routes of this Visual Amenity scenario, however the effects will be localised and will diminish rapidly with distance from the route. Localised effects have been identified for visual receptors utilising a proportion of the footpaths, roads and residential properties sited close the routes/sites of this scenario.

Overall, effects are more likely for landscape and visual receptors located close to the southern sections of the proposed routes. This is because this is generally a more elevated area with lower levels of vegetation cover consequently there would be greater potential visibility for the routes. In comparison, the central and northern sections of the Llandinam – Welshpool route is routed through more diverse and enclosed landscape character types, although the corollary is that these sections tend to be more populous, therefore a greater number of receptors are likely.

Mid Wales Grid Session 4 Evidence 6 December 2013

Topic Summary of Environmental Effects

Water Environment Flood risk is not expected to be an issue for the routes included in this scenario. The routes will cross a number of tributaries, including rivers within SSSIs and SACs however these can be spanned by wood pole infrastructure and mitigation measures are likely to ensure their protection during construction.

Table 4: Summary of Effects for Scenarios 3, 6 and 8a - Llandinam connection to Welshpool, a 132 kV HDWP from SSA C to SSA B and (at least) one 132 kV HDWP to Legacy Note: The following table does not include any environmental information for the effects of constructing any 132kV lines to Legacy.

Topic Summary of Environmental Effects

Ecology/Biodiversity and Birds: There are a number of ornithological 'hot-spots' in proximity to the Geological Conservation proposed routes, whereby there is potential for larger species, (such as swans) to collide with overhead lines which presents a long-term permanent hazard to birds. However the use of bird deflectors is likely to reduce this risk. There is also a concern that the movements and noises associated with the construction of the NG substation may have a detrimental effect upon birds that nest nearby.

Designated Sites: No designated sites are likely to be directly affected by the proposed grid connections, however there are a number of designated sites which lie in close proximity to the routes.

Habitat Management Plans: Due to the location of the wind farm substations, the routes will pass through a number of wind farm HMP areas.

Protected Species: Protected species are likely to be located in proximity to the routes. However full compliance with relevant protected species legislation is likely to help to minimise any effects.

Peatland Habitats: A number of the routes pass through areas of potential peatland habitat.

Historic Environment Two designated features (SAMs) are located within the Llandinam route and one within the SP MWC BNC route. The Llandinam Route and other routes included in this scenario pass within 1-2km of other historic assets, including: SAMs, Conservation Areas, Listed Buildings (primarily lower grade II but also including higher grade), historic landscapes, Registered Historic Parks and Gardens and undesignated below-ground sites/features. Mitigation measures will be deployed to minimise direct effects on features. However significant effects on the setting of a number of features are predicted.

Only the Llandinam route passes through a Registered Historic Landscape resulting in significant effects.

Mid Wales Grid Session 4 Evidence 7 December 2013

Topic Summary of Environmental Effects

Localised significant effects have been identified for visual receptors utilising a proportion of the footpaths, roads and residential properties sited close to the routes of this scenario.

Overall, for the SSAC connection to Welshpool, effects are more likely for landscape and visual receptors located close to the southern sections of the proposed route. This is because this is generally a more elevated area with lower levels of vegetation cover consequently there would be greater potential visibility for the routes. In comparison, the central and northern sections of the Llandinam – Welshpool line is routed through more diverse and enclosed landscape character types, although the corollary is that these sections tend to be more populous, therefore a greater number of receptors are likely.

The SSAC connection to Cefn Coch will be visible as it crosses roads and within valleys and there are likely to be potential visual effects on a number of residential properties.

Landscape and visual effects are likely along line route section 1 of BNC 3, BNC 4 and BNC5. However, these elements of this scenario will be screened from some receptors and directions. The overhead line may potentially be seen alongside other above ground equipment such the turbines of the planned wind farms.

Effects are likely for landscape and visual receptors around the substation at Cefn Coch than the SP Manweb Collector Substation: Option A. It is anticipated that there would be unrestricted and filtered views of the substation at Cefn Coch from the surrounding area, and it would potentially be seen alongside above ground equipment such as overhead electricity lines and the turbines of the planned wind farms.

Water Environment Flood risk is not expected to be an issue for the routes included in this scenario. The routes will cross many tributaries, including rivers within SSSIs and SACs however these can be spanned by wood pole infrastructure and mitigation measures are likely to ensure their protection during construction.

Table 5: Summary of Effects for Scenarios 5 and 7 – Llandinam connection to Welshpool and (at least) one 132 kV HDWP to Legacy Note: The following table does not include any environmental information for the effects of constructing any 132kV lines to Legacy.

Topic Summary of Environmental Effects

Designated Sites: No designated sites are likely to be directly affected by the proposed grid connections, however there are a number of designated site which lie in proximity to the routes.

Habitat Management Plans: Due to the location of the wind farm substations the routes will pass through a number of wind farm HMP areas.

Mid Wales Grid Session 4 Evidence 8 December 2013

Topic Summary of Environmental Effects

Peatland Habitats: A number of the routes pass through areas of potential peatland habitat.

Historic Environment Two designated features (SAMs) are located within the Llandinam route and one within the SP MWC BNC route. The Llandinam Route and other routes included in this scenario pass within 1-2km of other historic assets, including: SAMs, Conservation Areas, Listed Buildings (primarily lower grade II but also including higher grade), historic landscapes, Registered Historic Parks and Gardens and undesignated below-ground sites/features. Mitigation measures will be deployed to minimise direct effects on features. However, significant effects on the setting of a number of features are predicted.

Only the Llandinam route passes through a Registered Historic Landscape resulting in significant effects.

Localised significant effects have been identified for visual receptors utilising a proportion of the footpaths, roads and residential properties sited close to the routes of this scenario.

Overall, for the SSAC connection, effects are more likely for landscape and visual receptors located close to the southern sections of the proposed route. This is because this is generally a more elevated area with lower levels of vegetation cover consequently there would be greater potential visibility for the routes. In comparison, the central and northern sections of the Llandinam – Welshpool route is routed through more diverse and enclosed landscape character types, although the corollary is that these sections tend to be more populous, therefore a greater number of receptors are likely.

Landscape and visual effects are likely along line route section 1 of BNC 3, BNC 4 and BNC5. However, these elements of this scenario will be screened from some receptors and directions and the overhead line may potentially be seen alongside other above ground equipment such the turbines of the planned wind farms.

Mid Wales Grid Session 4 Evidence 9 December 2013

Table 6: Summary of Effects for Scenario 8b - Llandinam connection to Welshpool, a 132 kV circuit between SSA B and SSA C and National Grid 400kv circuit to Lower Frankton from National Grid 400kV substation at Cefn Coch

Topic Summary of Environmental Effects

Ecology/Biodiversity and Birds: There are a number of ornithological 'hot-spots' in proximity to the Geological Conservation proposed routes, whereby there is potential for larger species, (such as swans) to collide with overhead lines which presents a long-term permanent hazard to birds, however the use of bird deflectors is likely to reduce this risk. There is also a concern that the movements and noises associated with the construction of the NG substation may have a detrimental effect upon birds that nest nearby.

Designated Sites: The Montgomery / Shropshire Union Canal SAC and Montgomery Canal SSSI are crossed by the 400kV preferred route corridor. No other designated sites are likely to be directly affected by the proposed grid connections, however there are a number of designated sites which lie in close proximity to the routes.

Habitat Management Plans: Due to the location of the wind farm substations the routes will pass through a number of wind farm HMP areas.

Peatland Habitats: A number of the routes pass through areas of potential peatland habitat.

Historic Environment Two designated features (SAMs) are located within the Llandinam route and one within the SP MWC BNC route. There are also multiple SAMs located within the 400kV preferred route. The Llandinam Route and other routes included in this scenario pass within 1-2km of other historic assets, including: SAMs, Conservation Areas, Listed Buildings (primarily lower grade II but also including higher grade), historic landscapes, Registered Historic Parks and Gardens and undesignated below-ground sites/features. Mitigation measures will be deployed to minimise direct effects on features. However, significant effects on the setting of a number of features are predicted.

Only the Llandinam route passes through a Registered Historic Landscape resulting in significant effects.

Landscape and Landscape and visual effects are likely to arise along the routes of this Visual Amenity scenario, however the effects will be localised and will diminish rapidly with distance from the route. Views are also variable depending on localised topography and tree cover.

Localised significant effects have been identified for visual receptors utilising a proportion of the footpaths, roads and residential properties sited close to the routes of this scenario. In some locations along the 400kV line preferred route, settlements, including a number of large villages are affected. Also, the popular viewpoint of Llanymynech Hill with its Heritage Trail overlooks this section of the preferred route corridor.

Mid Wales Grid Session 4 Evidence 10 December 2013

Topic Summary of Environmental Effects

While the existing 400 kV line is noticeable in locations along the route, it is not a dominant landscape feature, particularly towards the eastern end of the route.

Overall, for the SSAC connection to Welshpool, effects are more likely for landscape and visual receptors located close to the southern sections of the proposed route. This is because this is generally a more elevated area with lower levels of vegetation cover consequently there would be greater potential visibility for the routes. In comparison, the central and northern sections of the Llandinam – Welshpool route is routed through more diverse and enclosed landscape character types, although the corollary is that these sections tend to be more populous, therefore a greater number of receptors are likely.

The SSAC connection to Cefn Coch will be visible as it crosses roads and within valleys and there are likely to be potential visual effects on a number of residential properties.

Landscape and visual effects are likely along line route section 1 of BNC 3, BNC 4 and BNC5. However, these elements of this scenario will be screened from some receptors and directions and the overhead line may potentially be seen alongside other above ground equipment such the turbines of the planned wind farms.

Water Environment Flood risk is not expected to be an issue for most routes included in this scenario. However, the 400kV line preferred route crosses extensive areas of flood plain, areas of indicative reservoir flood risk and groundwater flows associated with floodplain areas, which all requires consideration.

The routes will cross many tributaries, including rivers within SSSIs and SACs however these can be spanned by wood pole infrastructure and mitigation measures are likely to ensure their protection during construction.

Mid Wales Grid Session 4 Evidence 11 December 2013

APPENDIX 1: SUMMARY OF ENVIRONMENTAL INFORMATION FOR GRID SCENARIOS

APPENDIX 1

Table A: Publications that have been used to assess the environmental effects of each scenario

Scenario Solution Source of Environmental Information (Green = Environmental information available; Amber = Some environmental information not available)

1 Up to 150 MW (one or two wind farms) in SSA C; no 132 kV HDWP line from SSA C to connect to the Environmental information for how the wind farms in SSA C can connect to the Llandinam Route can be found in: SP MANWEB wind farms in SSA B) SP Manweb network at Welshpool. Requires SP (Sept 2013). SP Mid Wales Connections, Line Routing Methodology & Appraisal - Phase 3 Report. Manweb reinforcements north of Welshpool Environmental information for the Llandinam Route can be found in: SP MANWEB (Oct 2013). Volume 1: New 132kV Overhead Line Connection from Llandinam Wind Farm to Welshpool Substation - Updated Environmental Statement.

2 Over 150 MW (all three wind farms) in SSA C; no The connection to Welshpool, as outlined in Environmental information for how the wind farms in SSA C can connect to the Llandinam Route can be found in: SP MANWEB wind farms in SSA B option 1, plus a 132 kV HDWP connection to (Sept 2013). SP Mid Wales Connections, Line Routing Methodology & Appraisal - Phase 3 Report. Shrewsbury Environmental information for the Llandinam Route can be found in: SP MANWEB (Oct 2013). Volume 1: New 132kV Overhead Line Connection from Llandinam Wind Farm to Welshpool Substation - Updated Environmental Statement.

No environmental information is available for a complete circuit to Shrewsbury.

3 Over 150 MW (all three wind farms) in SSA C; at The connection to Welshpool, as outlined in Environmental information for how the wind farms in SSA B and SSA C can connect to the Substation at Cefn Coch, and the least one wind farm in Area B option 1, plus a 132 kV HDWP from SSA C to Llandinam Route can be found in: SP MANWEB (Sept 2013). SP Mid Wales Conne ctions, Line Routing Methodology & Appraisal SSA B. This assumes there must be (at least) - Phase 3 Report. one circuit to Legacy (see the following options) Environmental information for the Llandinam Route can be found in: SP MANWEB (Oct 2013). Volume 1: New 132kV Overhead Line Connection from Llandinam Wind Farm to Welshpool Substation - Updated Environmental Statement.

Environmental information for the Substation at Cefn Coch can be found in: National Grid (Sept 2013). Mid Wales Connection Project, Draft Substation Site Report.

No environmental information is available for a complete circuit to Legacy.

4 Up to 150 MW (one wind farm) in SSA B; no wind 132 kV HDWP circuit to Welshpool from SSA B Environmental information for how the wind farms in SSA B route towards Welshpool (as far as the substation at Cefn Coch) farms in SSA C can be found in: SP MANWEB (Sept 2013). SP Mid Wales Connections, Line Routing Methodology & Appraisal - Phase 3 Report.

No environmental information is available for a complete circuit to Welshpool.

5 Up to 117.8 MW or 167.2 MW (one wind farm) in 132 kV HDWP circuit (124 MVA or 176 MVA) to Environmental information for how the wind farms in SSA B route towards Legacy (as far as the substation at Cefn Coch) and SSA B; two wind farms in SSA C of up to a total of Legacy from SSA B, plus connection option 1 SSA C connect to the Llandinam Route can be found in: SP MANWEB (Sept 2013). SP Mid Wales Connections, Line Routing 150 MW Methodology & Appraisal - Phase 3 Report.

Environmental information for the Llandinam Route can be found in: SP MANWEB (Oct 2013). Volume 1: New 132kV Overhead Line Connection from Llandinam Wind Farm to Welshpool Substation - Updated Environmental Statement.

No environmental information is available for a complete circuit to Legacy. Scenario Solution Source of Environmental Information (Green = Environmental information available; Amber = Some environmental information not available)

6 Up to 87.2 MW (Llanbrynmair) in SSA B; all three 132 kV HDWP circuit (176 MVA) to Legacy from Environmental information for how the wind farms in SSA B and SSA C can connect to the Substation at Cefn Coch, and the wind farms in SSA C SSA B, plus connection option 1, plus 132 kV Llandinam Route can be found in: SP MANWEB (Sept 2013). SP Mid Wales Connections, Line Routing Methodology & Appraisal HDWP between SSA B and SSA C - Phase 3 Report.

Environmental information for the Substation at Cefn Coch can be found in: National Grid (Sept 2013). Mid Wales Connection Project, Draft Substation Site Report.

No environmental information is available for a complete circuit to Legacy.

7 Both wind farms in SSA B; up to 150 MW (two wind 2 x 132 kV HDWP circuits to Legacy from SSA B, Environmental information for how the wind farms in SSA B route towards Legacy (as far as the substation at Cefn Coch) and farms) in SSA C plus connection option 1 SSA C connect to the Llandinam Route can be found in: SP MANWEB (Sept 2013). SP Mid Wales Connections, Line Routing Methodology & Appraisal - Phase 3 Report.

8a All five windfarms 2 x 132 kV circuits (2 x HDWP or an L4 tower Environmental information for how the wind farms in SSA B and SSA C can connect to the Substation at Cefn Coch, and the line) to Legacy from SSA B, plus a 132 kV circuit Llandinam Route can be found in: SP MANWEB (Sept 2013). SP Mid Wales Connections, Line Routing Methodology & Appraisal between SSA B and SSA C, plus connection - Phase 3 Report. option 1 Environmental information for the Llandinam Route can be found in: SP MANWEB (Oct 2013). Volume 1: New 132kV Overhead Line Connection from Llandinam Wind Farm to Welshpool Substation - Updated Environmental Statement.

Environmental information for the Substation at Cefn Coch can be found in: National Grid (Sept 2013). Mid Wales Connection Project, Draft Substation Site Report.

No environmental information is available for complete routes to Legacy.

Environmental information for how the wind farms in SSA B and SSA C can connect to the Substation at Cefn Coch, and the 8b All five windfarms National Grid 400kv circuit to Lower Frankton Llandinam Route can be found in: SP MANWEB (Sept 2013). SP Mid Wales Connections, Line Routing Methodology & Appraisal from National Grid 400kV substation at Cefn - Phase 3 Report. Coch, plus a 132 kV circuit between SSA B and SSA C, plus connection option 1 Environmental information for the Llandinam Route can be found in: SP MANWEB (Oct 2013). Volume 1: New 132kV Overhead Line Connection from Llandinam Wind Farm to Welshpool Substation - Updated Environmental Statement.

Environmental information for the Substation at Cefn Coch can be found in: National Grid (Sept 2013). Mid Wales Connection Project, Draft Substation Site Report.

Environmental information for the 400kv circuit to Lower Frankton can be found in: National Grid (Sept 2013). Mid Wales Connection Project, Draft Route Report.

Green = Environmental information is available for whole route.

Amber = Environmental information is not available for some sections of the route. Table B: Scenario 1 - 132 kV HDWP line from SSA C to Welshpool

Environmental Proposed Grid Connection Topics 132 kV HDWP line from SSA C to connect to the SP Manweb network at Welshpool SSA C Windfarms to Llandinam Route SP Manweb Collector Substation: Option A Llandinam Route to Welshpool Summary of Environmental Effects (Route Options CC1, CC2, CC3 and CC4: Line Route Section 1) Air Quality As no line route option is considered to have a greater As no line route option is considered to have a greater or lesser Not covered in Reference 2. This topic has not been included in the and Emissions or lesser effect in respect of this topic at this scale, this effect in respect of this topic at this scale, this topic has not been environmental assessments or reports (incl. dust) topic has not been included as it does not assist in included as it does not assist in identifying a line route with least for the routes included in this scenario. identifying a line route with least environmental effect. environmental effect. This topic will be considered at the EIA This topic will be considered at the EIA stage. (page 48 stage. (page 48 of Ref. 1) of Ref. 1) Ecology/Biodi CC4, CC1 and CC3: Line route section 1 (page 91 of SP Manweb Collector Substation: Option A (Tables 6.4 and Llandinam Route to Welshpool (Chapter 7 of Ref. 2) Birds: There is potential for birds versity and Ref. 1) 6.5 of Ref. 1) It is considered that the proposed overhead line is not likely particularly larger species (such as Geological Wind farm Habitat Management Plan Area (HMP) - The SAC - The River Wye SAC headwaters lie 0.75km to the south to result in any significant adverse long-term effects. If the swans) to collide with the overhead Conservation route passes through several HMP areas associated with east of the site with associated freshwater sensitivities. mitigation measures discussed in Chapter 7 (Ref. 2) are lines. This represents a long-term, Hirddywell Wind Farm. fully implemented any risk of adverse effects will be further permanent hazard to certain groups of SSSI - The site lies less than 1km from Gweunydd Camnant reduced. birds but the use of bird deflectors is Protected Species - The route passes through a small SSSI, designated for habitats, the River Ithon SSSI and the likely to help to reduce this risk. potential protected species hotspot at Custogion. Two Esgairdraenllwyn Pastures SSSI, designated for habitats. The potential for collisions with overhead lines is probably further potential protected species hotspots are located the most significant effect likely to arise. This represents a Designated Sites: The proposed routes within 2km of the route. long-term, permanent hazard to certain groups of birds, to Llandinam and the Man Web Collector primarily the larger species such as swans and to a lesser Station do not cross any nature Peatland Habitats - The route passes through two large extent the smaller wildfowl. However, the erection of bird conservation designations. Several sites areas of potential peat. It also passes through areas deflectors in appropriate locations will reduce the risk of do however lie within close proximity to identified in Environmental Statements as supporting birds colliding with the overhead line, and the erection of the route. peat habitats. devices to discourage or prevent roosting on wood pole supports will reduce the risk of predation on ground nesting Peatland: The route will pass through Ornithological ‘Hot Spots’ - The route is not associated birds. areas identified as having potential with any ornithological hotspots; however the Tylwch tip peatland habitats. hotspot is approx. 400m to the north-west.

Sites Designated for Nature Conservation Importance Habitat Management Plans: Due to the (SPA, SAC, SSSI) - The route does not pass through any location of the wind farm substations the statutory designated sites; however several designated routes will pass through a wind farm areas are within a 2km radius, including the River Wye HMP area. SAC. The closest site is the Gweunydd Camnant SSSI, Protected Species: Protected species are approx. 55m to the north. likely to be located in proximity to the routes. However full compliance with relevant protected species legislation is likely to help to minimise any effects. Climate As no line route option is considered to have a greater As no line route option is considered to have a greater or lesser Not covered in Reference 2. This topic has not been included in the Change or lesser effect in respect of this topic at this scale, this effect in respect of this topic at this scale, this topic has not been environmental assessments or reports topic has not been included as it does not assist in included as it does not assist in identifying a line route with least for the routes included in this scenario. identifying a line route with least environmental effect. environmental effect. This topic will be considered at the EIA This topic will be considered at the EIA stage. (page 48 stage. (page 48 of Ref. 1) of Ref. 1) Electric and As no line route option is considered to have a greater As no line route option is considered to have a greater or lesser Llandinam Route to Welshpool (Chapter 11 of Ref. 2) This topic has not been included in the Magnetic or lesser effect in respect of this topic at this scale, this effect in respect of this topic at this scale, this topic has not been No significant environmental effects are anticipated on environmental assessments or reports Fields topic has not been included as it does not assist in included as it does not assist in identifying a line route with least electric and magnetic fields. On this basis, the decision for the routes included in this scenario. identifying a line route with least environmental effect. environmental effect. This topic will be considered at the EIA was made to not make this topic the subject of a detailed This topic will be considered at the EIA stage. (page 48 stage. (page 48 of Ref. 1) environmental impact assessment. of Ref. 1) Environmental Proposed Grid Connection Topics 132 kV HDWP line from SSA C to connect to the SP Manweb network at Welshpool SSA C Windfarms to Llandinam Route SP Manweb Collector Substation: Option A Llandinam Route to Welshpool Summary of Environmental Effects (Route Options CC1, CC2, CC3 and CC4: Line Route Section 1) Forestry and CC4, CC1 and CC3: Line route section 1 (page 93 of SP Manweb Collector Substation: Option A (Tables 6.4 and Llandinam Route to Welshpool (Chapter 7 of Ref. 2) Woodland Ref. 1) 6.5 of Ref. 1) It is considered that the proposed overhead line is not likely Some trees and hedgerows will be lost to Ancient and Semi-Natural woodland (ASNW) - Route 1 Other Forestry and Woodland - There are a number of small to result in any significant adverse long-term effects. If the facilitate construction of the grid affects one area of ASNW adjacent to Llwydiarth Wood blocks of forestry and shelter belt planting located within the mitigation measures discussed in Chapter 7 (Ref. 2) are connection routes. The loss of trees may which will be avoided, where possible, at detailed design vicinity of the substation site which will screen and backdrop the fully implemented any risk of adverse effects will be further result in potential habitat loss for bats, stage. proposed substation. The site will not require any felling of reduced. although this is expected to be a existing plantation woodland. localised effect. Other Forestry and Woodland - Route 1 crosses some Some trees will be lost to facilitate construction of the areas of narrow shelter planting with potential felling Amended Development, including trees that may have In some locations, mature trees as well required on higher ground, for example around Ddullui potential for bats. This tree loss may result in potential as Ancient and Semi-Natural woodland Bank. habitat loss for bats. may be affected by construction of the proposed routes. Although this will be Within the Nant Feigion valley, felling of hedgerow and avoided where possible at the detailed woodland edge trees may be required. design stage, limited felling may be required in some locations. Geology and Not included in Reference 3. Not included in Reference 3. Llandinam Route to Welshpool (Chapter 11 of Ref. 2) This topic has not been included in the Soils No significant environmental effects are anticipated on environmental assessments or reports geology or soil resources. On this basis, the decision was for the routes included in this scenario. made to not make this topic the subject of a detailed environmental impact assessment. Historic CC4, CC1 and CC3: Line route section 1 (pages 92 SP Manweb Collector Substation: Option A (Tables 6.4 and Llandinam Route to Welshpool (Chapter 8 of Ref. 2) The Llandinam Route is the only route Environment and 93 of Ref. 1) 6.5 of Ref. 1) The proposed overhead line from the Llandinam corridor that has designated historic SAMs - No SAMs are located within the route. 24 SAMs Undesignated Archaeology - An undesignated site of historical Repowering Wind Farm to the Welshpool Grid Substation, assets within it, as two SAMs are located in 14 groups lie within 2km of the route. interest (a single storey derelict stone building) lies immediately some 35 km long, adopts a course to the south and east of within the route. The Llandinam Route Virtually all the SAMs are prehistoric burial and ritual adjacent to the site to the northeast. the Severn Valley which takes it past and through some of and other routes included in this monuments, some with wide-ranging views and group the richest cultural heritage landscapes in mid Wales. scenario pass within 1-2km of other values. historic assets, including: SAMs, There are 55 SAMs located within 2km of the overhead line, Conservation Areas, Listed Buildings Listed Buildings (LBs) - No Listed Buildings are located two of them (Crugyn Bank Dyke and Bryn Cwmyrhiwdre (primarily lower grade II but also within the route. There are 10 Listed Buildings within Round Barrow) within the 100m wide corridor. There are including higher grade) , registered 2km, all of lower grade II. also 452 Listed Buildings, five Registered Historic Parks and historic landscapes , registered historic Gardens, seven Conservation Areas, and one of Wales’ parks and gardens, and undesignated Conservation Areas - No Conservation Areas are within Registered Historic Landscapes would be crossed by the below-ground sites/features. Assuming 2km of the route section. proposed overhead line. that mitigation measures are successfully implemented, long-term Registered Historic Landscapes (RHLs) - No RHLs are It is the heritage assets within the 100 m wide corridor that direct impacts on cultural heritage are within 2km of the route. are most at risk from the proposed overhead line and could not expected to be significant. be adversely affected by its construction. Most of these are Undesignated Archaeology - There are 6 undesignated considered to be of low (local) or even negligible value, but There may be significant visual impacts archaeological features within the route; two of these there are some of medium (regional) significance, as well on the setting of some historic assets are buildings and one a prehistoric cairn. Direct effects as the few of high (national) importance. Appropriate such as Crugyn Bank Dyke and Bryn will be avoided, where possible, during detailed design. mitigation (e.g. preservation in situ, preservation by Cwmyrhiwdre Round Barrow. record, excavation, evaluation, watching brief) including the careful demarcation of assets is suggested which should Only the Llandinam route passes through ensure that damage is kept to a minimum during the a Registered Historic Landscape resulting erection of the supports. in significant effects.

The passage of the proposed overhead line through approximately 6.5 km of the Vale of Montgomery Registered Historic Landscape was subject to an ASIDOHL2 study in 2009 which established that whilst the overall Environmental Proposed Grid Connection Topics 132 kV HDWP line from SSA C to connect to the SP Manweb network at Welshpool SSA C Windfarms to Llandinam Route SP Manweb Collector Substation: Option A Llandinam Route to Welshpool Summary of Environmental Effects (Route Options CC1, CC2, CC3 and CC4: Line Route Section 1) effect would be moderate, locally it would be severe, representing a significant effect.

Land Use CC4, CC1 and CC3: Line route section 1 (page 94 of No environmental information was covered for this topic. Not covered in Reference 2. It is not possible to draw conclusions Ref. 1) from the environmental information Open space and Green Infrastructure - Route 1 crosses available, as all of the routes have not one area of Open Country access and lies within 1km of considered this topic. one other, and within 1km of two areas of Registered Common Land. Landscape CC4, CC1 and CC3: Line route section 1 (pages 91 SP Manweb Collector Substation: Option A (Tables 6.4 and Llandinam Route to Welshpool (Chapter 6 of Ref. 2) Landscape and visual effects are likely to and and 92 of Ref. 1) 6.5 of Ref. 1) Any likely significant landscape or visual effects would arise arise along the routes of this scenario, Visual Landscape Sensitivity - The route runs north-west from Landscape Sensitivity - The open pasture landscape lies below the during the operational stage from the localised loss of trees however the effects will be localised and Amenity Llanbadarn across open pasture, below higher moorland higher moorland tops to the north and east above the A483. The and the introduction into the landscape of approximately 35 will diminish rapidly with distance from tops to the east and above the A483. Although visible in Ithon valley runs to the east of the site but is relatively shallow at km of new overhead line on wood pole structures. The the route. longer views from the west, the landscape is of medium this point. The moderate sized pastoral fields are often design and routing of the proposed overhead line has been sensitivity due to its scale, blocks and belts of coniferous contained by coniferous shelter belts and larger woodland blocks, developed to minimise its effects on the landscape and Localised effects have been identified for woodland and existing wind farms. which both introduce man made elements to the landscape and visual amenity of the area. visual receptors utilising a proportion of break up and contain views. The substation is potentially visible the footpaths, roads and residential The route runs through the Ithon valley but is relatively within the landscape due to its elevation and the relatively open The location of the Llandinam wind farm on the Waun properties sited close the routes/sites of shallow at this point. nature of the upland landscape. However, the sensitivity of this Ddubarthog Ridge means that the route is more visible at this scenario. landscape is medium-low, and there is scope for extension of the the southern end of the corridor, than further north where The route turns west, crossing the A483 and Ithon existing areas of coniferous planting belts which contain views. it merges into the more diverse and enclosed landscape Overall, effects are more likely for valley across undulating higher land, with the 33kV line The site includes a belt of existing coniferous planting on its east of the Severn Valley. However, the use of wood pole landscape and visual receptors located from Neuadd Goch Wind Farm meeting the line in the southern edge which will both screen, and provide a backdrop for supports helps mitigate the effects within the more open close to the southern sections of the vicinity of Camnant, where a collector substation will be the substation infrastructure. and elevated parts of the route. proposed routes. This is because this is required. The route drops down from the higher land at generally a more elevated area with Hirddywel, running cross slope just below the highest Residential Visual Amenity - The area is sparsely populated with Landscape Effects lower levels of vegetation cover land at Pegwyn Bank and dropping down the steep scarp only four properties within 1km of the substation. Views from Although significant or borderline significant, all the effects consequently there would be greater slope to run west through the small Nant Feigion valley, residential properties will be limited to the properties at Camnant were assessed as minor-moderate or moderate and none of potential visibility for the routes. In contained by steep slopes and woodland blocks. Farm, Camnant Bridge and one property to the north-west. the effects was assessed as major. The only landscape comparison, the central and northern These views will be screened in part by intervening vegetation. along the route identified as experiencing a moderate and sections of the Llandinam – Welshpool Route 1 follows the field pattern, using field boundaries therefore significant effect is between the A483 near Old route is routed through more diverse and shelter belts to screen and backdrop the route. It The distance of the sites from the A483, the local landform, and Neuadd Bank and Cae-betin Wood, including the open and enclosed landscape character types, will be visible in views in the generally open landscape intervening vegetation, reduces visibility from the road. hillside below the Kerry Ridgeway Regional Trail. Other although the corollary is that these but these views will be broken by existing planting and areas of landscape (e.g. the Canlad Valley and the Severn sections tend to be more populous, will seldom skyline. Recreational Resource - There is a relatively dense network of Valley) would experience minor-moderate effects which therefore a greater number of receptors public rights of way in the vicinity of the site; two local public would be borderline significant. are likely. The route follows local valleys as it descends from the footpaths cross the site but these can be diverted to an existing higher ground, contained by topography and woodland track around the site. There would be views to the site from the Visual Effects planting. It will be visible intermittently in longer views adjacent public footpaths and others in the vicinity; however use Although significant or verging on significant, all the effects but will be set within the landscape. of the footpaths does not appear to be high. were assessed as minor - moderate or moderate and none of these effects was assessed as major. Visual Sensitivity - Route 1 will be visible as it crosses the A483, including both the 132kV alignment from In terms of settlements, some properties on the edge of Llanbadarn and the 33kV from Neuadd Goch. Otherwise Fron Bank/Cilcewydd, which lie within 500m of the the local road network is crossed 3 times. overhead line will experience a significant change in their view, where there is no screening afforded by landform, Residential Visual Amenity - Residential properties are buildings or vegetation. Of the many individual properties Environmental Proposed Grid Connection Topics 132 kV HDWP line from SSA C to connect to the SP Manweb network at Welshpool SSA C Windfarms to Llandinam Route SP Manweb Collector Substation: Option A Llandinam Route to Welshpool Summary of Environmental Effects (Route Options CC1, CC2, CC3 and CC4: Line Route Section 1) limited in the upland landscape, although 5 properties scattered throughout the study area, only those close to are likely to have views to the route, notably 2 the overhead line will experience a significant change in properties at Blue Line Farm. their view some of which will have views of the proposed overhead line. However, the nature of the proposed As the line drops off the high ground properties overhead line, combined with the screening effects of increase, including those at Cloesfynnon and Rhiw-felen, landform and vegetation, mean that its effect will be which will have views to the line. limited, and no views would create effects on residential amenity to the extent that they would become an Visitor Attractions - No visitor attractions have been undesirable place to live. identified that would be directly or indirectly affected by route 1. Users of local public rights of way and open access areas will be variably affected. Where a pole is seen in close Recreational Resource - Route 1 crosses Glwyndwr’s proximity to these areas (e.g. the public forest, footpaths Way once and a moderate density of RoWs also cross or and local access roads near Bryn-picca), the effect on run adjacent to the line. visual amenity will be significant, although this effect will diminish rapidly with distance. Similarly, road users will be variably affected. Significant residual effects are noted for the A483 and B4355, although these effects would be localised and transient.

Lighting Not included in Reference 1. Not included in Reference 1. Llandinam Route to Welshpool (Chapter 11 of Ref. 2) This topic has not been included in the No significant environmental effects are anticipated on environmental assessments or reports lighting. On this basis, the decision was made to not make for the routes included in this scenario. this topic the subject of a detailed environmental impact assessment. Noise and As no line route option is considered to have a greater As no line route option is considered to have a greater or lesser Llandinam Route to Welshpool (Chapter 11 of Ref. 2) This topic has not been included in the Vibration or lesser effect in respect of this topic at this scale, this effect in respect of this topic at this scale, this topic has not been No significant environmental effects are anticipated for environmental assessments or reports topic has not been included as it does not assist in included as it does not assist in identifying a line route with least noise. On this basis, the decision was made to not make for the routes included in this scenario. identifying a line route with least environmental effect. environmental effect. This topic will be considered at the EIA this topic the subject of a detailed environmental impact This topic will be considered at the EIA stage. (page 48 stage. (page 48 of Ref. 1) assessment. This is because of the low intensity of of Ref. 1) construction activities, the very low volume of vehicle movements which construction of the proposed overhead line would generate, the short-term (days rather than weeks) and reversible activities at each wood pole structure, and the proven methods of noise control at construction sites.

No significant socio-economic effects would arise from the construction and decommissioning of the proposed overhead line.

In respect of the operational stage, the proposed overhead line would not have any significant effects upon the local population, economy, local community assets, tourist attractions or tourism more broadly.

Existing and Proposed Wind Turbines - The route passes within proximity of turbines; however it will be possible to maintain the required distance.

Altitude and Topography - The eastern end of this route would cover altitudes of up to 455m at the substation at Llanbadarn Fynydd. Moving west, the land height is 373m at the Neuadd Goch substation. As the line moves south-west, land heights increase to around 420m at Llaithddu and then higher to around 550m at Hirddywel. Gradients range between 0-15°. As the line passes west of Hirddywel, there is a section of land with a gradient of between 15-22°. The height of land then reduces to around 320m as the route moves west before turning north. References (Ref.):

(1) SP MANWEB (Sept 2013). SP Mid Wales Connections, Line Routing Methodology & Appraisal - Phase 3 Report.

(2) SP MANWEB (Oct 2013). Volume 1: New 132kV Overhead Line Connection from Llandinam Wind Farm to Welshpool Substation - Updated Environmental Statement.

(3) National Grid (Sept 2013). Mid Wales Connection Project, Draft Substation Site Report.

(4) National Grid (Sept 2013). Mid Wales Connection Project, Draft Route Report.

Table C: Scenario 2 - Connection to Welshpool, plus a 132 kV HDWP connection to Shrewsbury

Environmental Proposed Grid Connection Topics Connection to Welshpool, as outlined in Scenario 1, plus a 132 kV HDWP connection to Shrewsbury SSA C Windfarms to Llandinam Route SP Manweb Collector Substation: Option A Llandinam Route to Welshpool 132kV HDWP connection Summary of Environmental Effects (Route Options CC1, CC2, CC3 and CC4: Line to Shrewsbury Route Section 1) Air Quality As no line route option is considered to have a As no line route option is considered to have a Not covered in Reference 2. No environmental This topic has not been included in the and Emissions greater or lesser effect in respect of this topic greater or lesser effect in respect of this topic information available. environmental assessments or reports (incl. dust) at this scale, this topic has not been included at this scale, this topic has not been included for the routes included in this scenario. as it does not assist in identifying a line route as it does not assist in identifying a line route with least environmental effect. This topic will with least environmental effect. This topic will be considered at the EIA stage. (page 48 of be considered at the EIA stage. (page 48 of Ref. 1) Ref. 1) Ecology/Biodi CC4, CC1 and CC3: Line route section 1 SP Manweb Collector Substation: Option A Llandinam Route to Welshpool (Chapter 7 of Ref. No environmental Birds: There is potential for birds versity and (page 91 of Ref. 1) (Tables 6.4 and 6.5 of Ref. 1) 2) information available. particularly larger species (such as Geological Wind farm Habitat Management Plan Area SAC - The River Wye SAC headwaters lie It is considered that the proposed overhead line is not swans) to collide with the overhead Conservation (HMP) - The route passes through several HMP 0.75km to the south east of the site with likely to result in any significant adverse long-term lines. This represents a long-term, areas associated with Hirddywell Wind Farm. associated freshwater sensitivities. effects. If the mitigation measures discussed in Chapter permanent hazard to certain groups of 7 (Ref. 2) are fully implemented any risk of adverse birds but the use of bird deflectors is Protected Species - The route passes through a SSSI - The site lies less than 1km from effects will be further reduced. likely to help to reduce this risk. small potential protected species hotspot at Gweunydd Camnant SSSI, designated for Custogion. Two further potential protected habitats, the River Ithon SSSI and the The potential for collisions with overhead lines is Designated Sites: The proposed routes species hotspots are located within 2km of the Esgairdraenllwyn Pastures SSSI, designated for probably the most significant effect likely to arise. This to Llandinam and the Man Web route. habitats. represents a long-term, permanent hazard to certain Connector Station do not cross any groups of birds, primarily the larger species such as nature conservation designations. Peatland Habitats - The route passes through swans and to a lesser extent the smaller wildfowl. Several sites do however lie within close two large areas of potential peat. It also However, the erection of bird deflectors in appropriate proximity to the route. passes through areas identified in locations will reduce the risk of birds colliding with the Environmental Statements as supporting peat overhead line, and the erection of devices to discourage Peatland: The route will pass through habitats. or prevent roosting on wood pole supports will reduce areas identified as having potential the risk of predation on ground nesting birds. peatland habitats. Ornithological ‘Hot Spots’ - The route is not associated with any ornithological hotspots; Habitat Management Plans: Due to the however the Tylwch tip hotspot is approx. location of the wind farm substations the 400m to the north-west. routes will pass through a wind farm HMP area. Sites Designated for Nature Conservation Protected Species: Protected species are Importance (SPA, SAC, SSSI) - The route does likely to be located in proximity to the not pass through any statutory designated routes. However full compliance with sites; however several designated areas are relevant protected species legislation is within a 2km radius, including the River Wye likely to help to minimise any effects. SAC. The closest site is the Gweunydd Camnant SSSI, approx. 55m to the north. Climate As no line route option is considered to have a As no line route option is considered to have a Not covered in Reference 2. No environmental This topic has not been included in the Change greater or lesser effect in respect of this topic greater or lesser effect in respect of this topic information available. environmental assessments or reports at this scale, this topic has not been included at this scale, this topic has not been included for the routes included in this scenario. as it does not assist in identifying a line route as it does not assist in identifying a line route with least environmental effect. This topic will with least environmental effect. This topic will be considered at the EIA stage. (page 48 of be considered at the EIA stage. (page 48 of Ref. 1) Ref. 1) Electric and As no line route option is considered to have a As no line route option is considered to have a Llandinam Route to Welshpool (Chapter 11 of Ref. No environmental This topic has not been included in the Magnetic greater or lesser effect in respect of this topic greater or lesser effect in respect of this topic 2) information available. environmental assessments or reports Fields at this scale, this topic has not been included at this scale, this topic has not been included No significant environmental effects are anticipated on for the routes included in this scenario. as it does not assist in identifying a line route as it does not assist in identifying a line route electric and magnetic fields. On this basis, the decision with least environmental effect. This topic will with least environmental effect. This topic will was made to not make this topic the subject of a be considered at the EIA stage. (page 48 of be considered at the EIA stage. (page 48 of detailed environmental impact assessment. Ref. 1) Ref. 1) Environmental Proposed Grid Connection Topics Connection to Welshpool, as outlined in Scenario 1, plus a 132 kV HDWP connection to Shrewsbury SSA C Windfarms to Llandinam Route SP Manweb Collector Substation: Option A Llandinam Route to Welshpool 132kV HDWP connection Summary of Environmental Effects (Route Options CC1, CC2, CC3 and CC4: Line to Shrewsbury Route Section 1) Forestry and CC4, CC1 and CC3: Line route section 1 SP Manweb Collector Substation: Option A Llandinam Route to Welshpool (Chapter 7 of Ref. No environmental Woodland (page 93 of Ref. 1) (Tables 6.4 and 6.5 of Ref. 1) 2) information available. Some trees and hedgerows will be lost to Ancient and Semi-Natural woodland (ASNW) - Other Forestry and Woodland - There are a It is considered that the proposed overhead line is not facilitate construction of the grid Route 1 affects one area of ASNW adjacent to number of small blocks of forestry and shelter likely to result in any significant adverse long-term connection routes. The loss of trees may Llwydiarth Wood which will be avoided, where belt planting located within the vicinity of the effects. If the mitigation measures discussed in Chapter result in potential habitat loss for bats, possible, at detailed design stage. substation site which will screen and backdrop 7 (Ref. 2) are fully implemented any risk of adverse although this is expected to be a the proposed substation. The site will not effects will be further reduced. localised effect. Other Forestry and Woodland - Route 1 crosses require any felling of existing plantation some areas of narrow shelter planting with woodland. Some trees will be lost to facilitate construction of the In some locations, mature trees as well potential felling required on higher ground, for Amended Development, including trees that may have as Ancient and Semi-Natural woodland example around Ddullui Bank. potential for bats. This tree loss may result in potential may be affected by construction of the habitat loss for bats. proposed routes. Although this will be Within the Nant Feigion valley, felling of avoided where possible at the detailed hedgerow and woodland edge trees may be design stage, limited felling may be required. required in some locations. Geology and Not included in Reference 3. Not included in Reference 3. Llandinam Route to Welshpool (Chapter 11 of Ref. No environmental This topic has not been included in the Soils 2) information available. environmental assessments or reports No significant environmental effects are anticipated on for the routes included in this scenario. geology or soil resources. On this basis, the decision was made to not make this topic the subject of a detailed environmental impact assessment. Historic CC4, CC1 and CC3: Line route section 1 SP Manweb Collector Substation: Option A Llandinam Route to Welshpool (Chapter 8 of Ref. No environmental The Llandinam Route is the only route Environment (pages 92 and 93 of Ref. 1) (Tables 6.4 and 6.5 of Ref. 1) 2) information available. corridor that has designated historic SAMs - No SAMs are located within the route. Undesignated Archaeology - An undesignated The proposed overhead line from the Llandinam assets within it, as two SAMs are located 24 SAMs in 14 groups lie within 2km of the site of historical interest (a single storey Repowering Wind Farm to the Welshpool Grid within the route. The Llandinam Route route. derelict stone building) lies immediately Substation, some 35 km long, adopts a course to the and other routes included in this Virtually all the SAMs are prehistoric burial and adjacent to the site to the northeast. south and east of the Severn Valley which takes it past scenario pass within 1-2km of other ritual monuments, some with wide-ranging and through some of the richest cultural heritage historic assets, including: SAMs, views and group values. landscapes in mid Wales. Conservation Areas, Listed Buildings (primarily lower grade II but also Listed Buildings (LBs) - No Listed Buildings are There are 55 SAMs located within 2km of the overhead including higher grade) , registered located within the route. There are 10 Listed line, two of them (Crugyn Bank Dyke and Bryn historic landscapes, registered park and Buildings within 2km, all of lower grade II. Cwmyrhiwdre Round Barrow) within the 100m wide gardens, and undesignated below- corridor. There are also 452 Listed Buildings, five ground sites/features. Assuming that Conservation Areas - No Conservation Areas Registered Historic Parks and Gardens, seven mitigation measures are successfully are within 2km of the route section. Conservation Areas, and one of Wales’ Registered implemented, long-term direct impacts Historic Landscapes would be crossed by the proposed on cultural heritage are not expected to Registered Historic Landscapes (RHLs) - No overhead line. be significant. RHLs are within 2km of the route. It is the heritage assets within the 100 m wide corridor There may be significant visual impacts Undesignated Archaeology - There are 6 that are most at risk from the proposed overhead line on some historic assets such as Crugyn undesignated archaeological features within and could be adversely affected by its construction. Bank Dyke and Bryn Cwmyrhiwdre the route; two of these are buildings and one a Most of these are considered to be of low (local) or even Round Barrow. prehistoric cairn. Direct effects will be avoided, negligible value, but there are some of medium where possible, during detailed design. (regional) significance, as well as the few of high Only the Llandinam route passes through (national) importance. Appropriate mitigation (e.g. a Registered Historic Landscape resulting preservation in situ, preservation by record, excavation, in significant effects. evaluation, watching brief) including the careful demarcation of assets is suggested which should ensure that damage is kept to a minimum during the erection of the supports.

Assuming that a full suite of mitigation measures is successfully implemented, the proposed overhead line should not have any significant long-term effect on the cultural heritage. In particular, there are no likely significant direct effects on cultural heritage arising during the construction, operation or decommissioning of the proposed overhead line. Environmental Proposed Grid Connection Topics Connection to Welshpool, as outlined in Scenario 1, plus a 132 kV HDWP connection to Shrewsbury SSA C Windfarms to Llandinam Route SP Manweb Collector Substation: Option A Llandinam Route to Welshpool 132kV HDWP connection Summary of Environmental Effects (Route Options CC1, CC2, CC3 and CC4: Line to Shrewsbury Route Section 1)

Land Use CC4, CC1 and CC3: Line route section 1 No environmental information was covered for Not covered in Reference 2. No environmental It is not possible to draw conclusions (page 94 of Ref. 1) this topic. information available. from the environmental information Open space and Green Infrastructure - Route 1 available, as all of the routes have not crosses one area of Open Country access and considered this topic. lies within 1km of one other, and within 1km of two areas of Registered Common Land. Landscape CC4, CC1 and CC3: Line route section 1 SP Manweb Collector Substation: Option A Llandinam Route to Welshpool (Chapter 6 of Ref. No environmental Landscape and visual effects are likely to and (pages 91 and 92 of Ref. 1) (Tables 6.4 and 6.5 of Ref. 1) 2) information available. arise along the routes of this scenario, Visual Landscape Sensitivity - The route runs north- Landscape Sensitivity - The open pasture Any likely significant landscape or visual effects would however the effects will be localised and Amenity west from Llanbadarn across open pasture, landscape lies below the higher moorland tops arise during the operational stage from the localised loss will diminish rapidly with distance from below higher moorland tops to the east and to the north and east above the A483. The of trees and the introduction into the landscape of the route. above the A483. Although visible in longer Ithon valley runs to the east of the site but is approximately 35 km of new overhead line on wood pole views from the west, the landscape is of relatively shallow at this point. The moderate structures. The design and routeing of the proposed Localised effects have been identified for medium sensitivity due to its scale, blocks and sized pastoral fields are often contained by overhead line has been developed to minimise its effects visual receptors utilising a proportion of belts of coniferous woodland and existing wind coniferous shelter belts and larger woodland on the landscape and visual amenity of the area. the footpaths, roads and residential farms. blocks, which both introduce man made properties sited close the routes/sites of elements to the landscape and break up and The location of the Llandinam wind farm on the Waun this scenario. The route runs through the Ithon valley but is contain views. The substation is potentially Ddubarthog Ridge means that the route is more visible relatively shallow at this point. visible within the landscape due to its elevation at the southern end of the corridor, than further north Overall, effects are more likely for and the relatively open nature of the upland where it merges into the more diverse and enclosed landscape and visual receptors located The route turns west, crossing the A483 and landscape. However, the sensitivity of this landscape east of the Severn Valley. However, the use close to the southern sections of the Ithon valley across undulating higher land, landscape is medium-low, and there is scope of wood pole supports helps mitigate the effects within proposed routes. This is because this is with the 33kV line from Neuadd Goch Wind for extension of the existing areas of the more open and elevated parts of the route. generally a more elevated area with Farm meeting the line in the vicinity of coniferous planting belts which contain views. lower levels of vegetation cover Camnant, where a collector substation will be The site includes a belt of existing coniferous Landscape Effects consequently there would be greater required. The route drops down from the planting on its southern edge which will both Although significant or borderline significant, all the potential visibility for the routes. In higher land at Hirddywel, running cross slope screen, and provide a backdrop for the effects were assessed as minor-moderate or moderate comparison, the central and northern just below the highest land at Pegwyn Bank substation infrastructure. and none of the effects was assessed as major. The sections of the Llandinam – Welshpool and dropping down the steep scarp slope to only landscape along the route identified as experiencing route is routed through more diverse run west through the small Nant Feigion valley, Residential Visual Amenity - The area is a moderate and therefore significant effect is between and enclosed landscape character types, contained by steep slopes and woodland sparsely populated with only four properties the A483 near Old Neuadd Bank and Cae-betin Wood, although the corollary is that these blocks. within 1km of the substation. Views from including the open hillside below the Kerry Ridgeway sections tend to be more populous, residential properties will be limited to the Regional Trail. Other areas of landscape (e.g. the therefore a great number of receptors Route 1 follows the field pattern, using field properties at Camnant Farm, Camnant Bridge Canlad Valley and the Severn Valley) would experience are likely. boundaries and shelter belts to screen and and one property to the north-west. These minor-moderate effects which would be borderline backdrop the route. It will be visible in views in views will be screened in part by intervening significant. the generally open landscape but these views vegetation. will be broken by existing planting and will seldom skyline. Environmental Proposed Grid Connection Topics Connection to Welshpool, as outlined in Scenario 1, plus a 132 kV HDWP connection to Shrewsbury SSA C Windfarms to Llandinam Route SP Manweb Collector Substation: Option A Llandinam Route to Welshpool 132kV HDWP connection Summary of Environmental Effects (Route Options CC1, CC2, CC3 and CC4: Line to Shrewsbury Route Section 1)

The route follows local valleys as it descends The distance of the sites from the A483, the from the higher ground, contained by local landform, and intervening vegetation, Visual Effects topography and woodland planting. It will be reduces visibility from the road. Although significant or verging on significant, all the visible intermittently in longer views but will be effects were assessed as minor - moderate or moderate set within the landscape. Recreational Resource - There is a relatively and none of these effects was assessed as major. dense network of public rights of way in the Visual Sensitivity - Route 1 will be visible as it vicinity of the site; two local public footpaths In terms of settlements, some properties on the edge of crosses the A483, including both the 132kV cross the site but these can be diverted to an Fron Bank/Cilcewydd, which lie within 500m of the alignment from Llanbadarn and the 33kV from existing track around the site. There would be overhead line will experience a significant change in Neuadd Goch. Otherwise the local road views to the site from the adjacent public their view, where there is no screening afforded by network is crossed 3 times. footpaths and others in the vicinity; however landform, buildings or vegetation. Of the many use of the footpaths does not appear to be individual properties scattered throughout the study Residential Visual Amenity - Residential high. area, only those close to the overhead line will properties are limited in the upland landscape, experience a significant change in their view some of although 5 properties are likely to have views which will have views of the proposed overhead line. to the route, notably 2 properties at Blue Line However, the nature of the proposed overhead line, Farm. combined with the screening effects of landform and vegetation, mean that its effect will be limited, and no As the line drops off the high ground properties views would create effects on residential amenity to the increase, including those at Cloesfynnon and extent that they would become an undesirable place to Rhiw-felen, which will have views to the line. live.

Visitor Attractions - No visitor attractions have Users of local public rights of way and open access areas been identified that would be directly or will be variably affected. Where a pole is seen in close indirectly affected by route 1. proximity to these areas (e.g. the public forest, footpaths and local access roads near Bryn-picca), the Recreational Resource - Route 1 crosses effect on visual amenity will be significant, although this Glwyndwr’s Way once and a moderate density effect will diminish rapidly with distance. Similarly, road of RoWs also cross or run adjacent to the line. users will be variably affected. Significant residual effects are noted for the A483 and B4355, although these effects would be localised and transient.

Lighting Not included in Reference 1. Not included in Reference 1. Llandinam Route to Welshpool (Chapter 11 of Ref. No environmental This topic has not been included in the 2) information available. environmental assessments or reports No significant environmental effects are anticipated on for the routes included in this scenario. lighting. On this basis, the decision was made to not make this topic the subject of a detailed environmental impact assessment. Noise and As no line route option is considered to have a As no line route option is considered to have a Llandinam Route to Welshpool (Chapter 11 of Ref. No environmental This topic has not been included in the Vibration greater or lesser effect in respect of this topic greater or lesser effect in respect of this topic 2) information available. environmental assessments or reports at this scale, this topic has not been included at this scale, this topic has not been included No significant environmental effects are anticipated for for the routes included in this scenario. as it does not assist in identifying a line route as it does not assist in identifying a line route noise. On this basis, the decision was made to not with least environmental effect. This topic will with least environmental effect. This topic will make this topic the subject of a detailed environmental be considered at the EIA stage. (page 48 of be considered at the EIA stage. (page 48 of impact assessment. This is because of the low intensity Ref. 1) Ref. 1) of construction activities, the very low volume of vehicle movements which construction of the proposed overhead line would generate, the short-term (days rather than weeks) and reversible activities at each wood pole structure, and the proven methods of noise control at construction sites.

No significant socio-economic effects would arise from the construction and decommissioning of the proposed overhead line.

Existing and Proposed Wind Turbines - The route passes within proximity of turbines; however it will be possible to maintain the required distance.

(1) SP MANWEB (Sept 2013). SP Mid Wales Connections, Line Routing Methodology & Appraisal - Phase 3 Report.

(2) SP MANWEB (Oct 2013). Volume 1: New 132kV Overhead Line Connection from Llandinam Wind Farm to Welshpool Substation - Updated Environmental Statement.

(3) National Grid (Sept 2013). Mid Wales Connection Project, Draft Substation Site Report.

(4) National Grid (Sept 2013). Mid Wales Connection Project, Draft Route Report.

Table D: Scenario 3 - Connection to Welshpool, plus a 132 kV HDWP from SSA C to SSA B and (at least) one circuit to Legacy

Environment Proposed Grid Connection al Topics Connection to Welshpool, as outlined in Scenario 1, plus a 132 kV HDWP from SSA C to SSA B and (at least) one circuit to Legacy SSA C Windfarms to Llandinam SP Manweb Llandinam Route to SSA B Windfarms to 132kV Substation at Cefn Coch 132kV HDWP from Summary of Environmental Effects Route/Substation at Cefn Coch Collector Welshpool Substation at Cefn Coch (Located at Preferred National Grid Substation at Cefn (Route Options CC1, CC2, CC3 and Substation: Option (Route Options BNC 3, BNC 4, Substation Location NW at Cefn Coch) Coch (SSA B) to CC4: Line Route Sections 1-2a-3- A BNC 5: Line Route Sections 1 - Legacy 4b-5-6a-7a-8-9a-10) 2b) Air Quality As no line route option is As no line route Not covered in Reference As no line route option is Preferred Substation Location NW No environmental It is not possible to draw conclusions and considered to have a greater or option is considered 2. considered to have a greater or (Section 10.2 of Ref. 3) information from the environmental information Emissions lesser effect in respect of this topic to have a greater or lesser effect in respect of this The site is more than 1km northwest of available. available, as all of the routes have not (incl. dust) at this scale, this topic has not lesser effect in topic at this scale, this topic Tan-y-Foel Quarry and therefore considered this topic. been included as it does not assist respect of this topic has not been included as it unlikely to be significantly affected by in identifying a line route with least at this scale, this does not assist in identifying a dust from the quarry. environmental effect. This topic will topic has not been line route with least be considered at the EIA stage. included as it does environmental effect. This topic (page 48 of Ref. 1) not assist in will be considered at the EIA identifying a line stage. (page 48 of Ref. 1) route with least environmental effect. This topic will be considered at the EIA stage. (page 48 of Ref. 1) Ecology/Bio CC1, CC2, CC3 and CC4: Line SP Manweb Llandinam Route to BNC 3, 4 and 5 - line route Preferred Substation Location NW No environmental Birds: There are a number of diversity and Route Sections 1-2a-3-4b-5-6a- Collector Welshpool (Chapter 7 of section 1 (page 87 of Ref. 1) (Section 10.2 of Ref. 3) information ornithological 'hot-spots' in proximity to Geological 7a-8-9a-10 (Appendix 6.1 of Substation: Option Ref. 2) Wind farm Habitat Management This site is primarily located within an available. the proposed routes, whereby there is Conservation Ref. 1) A (Tables 6.4 and It is considered that the Plan Area (HMP) - The route area of semi-improved grassland with potential for larger species, (such as Wind farm Habitat Management 6.5 of Ref. 1) proposed overhead line is passes through the low species diversity. Areas of valuable swans) to collide with overhead lines Plan Area (HMP) - Line route SAC - The River Wye not likely to result in any Llanbrynmair Wind Farm HMP habitat do occur to the north east of which presents a long-term permanent sections 1, and 6a-10 pass through SAC headwaters lie significant adverse long- At its very eastern extent, the the site and are represented by hazard to birds, however the use of bird and/or are within 2km of HMP 0.75km to the south term effects. If the route borders provisional areas wetland/peatland habitats along a deflectors is likely to reduce this risk. areas for Hirddywell Wind Farm and east of the site with mitigation measures set out for the Tirgwynt HMP. stream valley, therefore indirect There is also a concern that the the Tirgwynt HMP area. associated discussed in Chapter 7 hydrological effects are a consideration movements and noises associated with Peatland Habitats - The route Protected Species - The route freshwater (Ref. 2) are fully passes through potential peat in this area. the construction of the NG substation passes through and passes within sensitivities. implemented any risk of habitat to the south and east of may have a detrimental effect upon 730m to 2km of many potential adverse effects will be Llanbrynmair Wind Farm, along Consideration of ornithological effects birds that nest nearby. protected species hotspots. SSSI - The site lies further reduced. the northern boundary of the is also required given proximity to less than 1km from woodland. habitats of bird value noted in Tirgwynt Designated Sites: No designated sites Peatland Habitats - Line route Gweunydd Camnant The potential for collisions EIA (e.g. nesting curlew). There is a are likely to be directly affected by the sections 1 passes through two large SSSI, designated for with overhead lines is Ornithological ‘Hot Spots’ - concern that the movements and proposed grid connections, however areas of potential peat. It also habitats, the River probably the most There are no ornithological noises associated with the construction there are a number of designated sites passes through areas identified in Ithon SSSI and the significant effect likely to hotspots associated with the of the substation may have a which lie in close proximity to the routes. Environmental Statements as Esgairdraenllwyn arise. This represents a route; however the Foel Quarry detrimental effect upon the curlews supporting peat habitats. hotspot is approximately 360m Pastures SSSI, long-term, permanent and other breeding bird that nest Habitat Management Plans: Due to the to the south. Ornithological ‘Hot Spots’ - The designated for hazard to certain groups of nearby. However, the EIA for the location of the wind farm substations the route passes through and within habitats. birds, primarily the larger BNC 3, 4 and 5 - line route consented Tirgwynt windfarm did not routes will pass through a number of 300m to 1.1km of many hot spots, species such as swans and section 2b (page 87 of Ref. identify this as a significant impact. wind farm HMP areas. including the Tylwch tip hotspot (to to a lesser extent the 1) the south of the route) and Bwlch y smaller wildfowl. Wind farm Habitat Management Due to the location of the substation Protected Species: Protected species are Garreg (to the north of the route). However, the erection of Plan Area (HMP) - Approx. site it is highly likely that the site, and likely to be located in proximity to the

Sites Designated for Nature bird deflectors in 700m of the route passes the indicative incoming connections routes. However full compliance with Conservation Importance (SPA, appropriate locations will through provisional areas set and potentially the outgoing National relevant protected species legislation is reduce the risk of birds out for the Tirgwynt HMP. Grid route associated with the site, will likely to help to minimise any effects. SAC, SSSI) - The route does not pass through any statutory colliding with the overhead Peatland Habitats - No potential affect valuable ecological features such designated sites; however several line, and the erection of peat areas were identified as peatland and/or ornithology. Peatland Habitats: A number of the designated areas are within a 2km devices to discourage or within the route. routes pass through areas of potential radius, including the River Wye SAC prevent roosting on wood peatland habitat. pole supports will reduce Ornithological ‘Hot Spots’ - and the Llan Mawr SSSI. The Approximately 450m of the closest site is the Gweunydd the risk of predation on ground nesting birds. route passes through the Foel Camnant SSSI, approx. 55m to the Quarry ornithological hotspot. north of line route section 1. Environment Proposed Grid Connection al Topics Connection to Welshpool, as outlined in Scenario 1, plus a 132 kV HDWP from SSA C to SSA B and (at least) one circuit to Legacy SSA C Windfarms to Llandinam SP Manweb Llandinam Route to SSA B Windfarms to 132kV Substation at Cefn Coch 132kV HDWP from Summary of Environmental Effects Route/Substation at Cefn Coch Collector Welshpool Substation at Cefn Coch (Located at Preferred National Grid Substation at Cefn (Route Options CC1, CC2, CC3 and Substation: Option (Route Options BNC 3, BNC 4, Substation Location NW at Cefn Coch) Coch (SSA B) to CC4: Line Route Sections 1-2a-3- A BNC 5: Line Route Sections 1 - Legacy 4b-5-6a-7a-8-9a-10) 2b) Climate As no line route option is As no line route Not covered in Reference As no line route option is Not included in Reference 3. No environmental This topic has not been included in the Change considered to have a greater or option is considered 2. considered to have a greater or information environmental assessments or reports lesser effect in respect of this topic to have a greater or lesser effect in respect of this available. for the routes included in this scenario. at this scale, this topic has not lesser effect in topic at this scale, this topic been included as it does not assist respect of this topic has not been included as it in identifying a line route with least at this scale, this does not assist in identifying a environmental effect. This topic will topic has not been line route with least be considered at the EIA stage. included as it does environmental effect. This topic (page 48 of Ref. 1) not assist in will be considered at the EIA identifying a line stage. (page 48 of Ref. 1) route with least environmental effect. This topic will be considered at the EIA stage. (page 48 of Ref. 1) Electric and As no line route option is As no line route Llandinam Route to As no line route option is Not included in Reference 3. No environmental This topic has not been included in the Magnetic considered to have a greater or option is considered Welshpool (Chapter 11 considered to have a greater or information environmental assessments or reports Fields lesser effect in respect of this topic to have a greater or of Ref. 2) lesser effect in respect of this available. for the routes included in this scenario. at this scale, this topic has not lesser effect in No significant topic at this scale, this topic been included as it does not assist respect of this topic environmental effects are has not been included as it in identifying a line route with least at this scale, this anticipated on electric and does not assist in identifying a environmental effect. This topic will topic has not been magnetic fields. On this line route with least be considered at the EIA stage. included as it does basis, the decision was environmental effect. This topic (page 48 of Ref. 1) not assist in made to not make this will be considered at the EIA identifying a line topic the subject of a stage. (page 48 of Ref. 1) route with least detailed environmental environmental effect. impact assessment. This topic will be considered at the EIA stage. (page 48 of Ref. 1) Forestry and CC1, CC2, CC3 and CC4: Line SP Manweb Llandinam Route to BNC 3, 4 and 5 - line route Not included in Reference 3. No environmental Woodland Route Sections 1-2a-3-4b-5-6a- Collector Welshpool (Chapter 7 section 1 (page 87 of Ref. 1) information Some trees and hedgerows will be lost to 7a-8-9a-10 (Appendix 6.1 of Substation: Option of Ref. 2) Other Forestry and Woodland - available. facilitate construction of the grid Ref. 1) A (Tables 6.4 and It is considered that the Route 1 will pass through connection routes. The loss of trees may Ancient and Semi-Natural woodland 6.5 of Ref. 1) proposed overhead line is c.320m of mature coniferous result in potential habitat loss for bats, (ASNW) - Line route sections 1, 4b, Other Forestry and not likely to result in any plantation above Nant y Graig although this is expected to be a and 6a will affect areas of ASNW, Woodland - There significant adverse long- Lwyd, and c.730m of mature localised effect. this will be avoided, where are a number of term effects. If the coniferous plantation at Cors yr possible, at detailed design stage. small blocks of mitigation measures Ebolion. Native trees along the In some locations, mature trees as well Line route sections 2a, 3, 4b, 7a forestry and shelter discussed in Chapter 7 Nant y Graig Lwyd may be as Ancient and Semi-Natural woodland and 8 affect areas of ASNW and belt planting located (Ref. 2) are fully affected by the lines. may be affected by construction of the limited felling may be required. within the vicinity of implemented any risk of proposed routes. Although this will be the substation site adverse effects will be BNC 3, 4 and 5 - line route avoided where possible at the detailed which will screen and further reduced. section 2b (page 87 of Ref. design stage, limited felling may be Other Forestry and Woodland - All backdrop the 1) required in some locations. line route sections cross some proposed substation. Some trees will be lost to Other Forestry and Woodland - fields where limited felling of The site will not facilitate construction of 2b may affect small stands of hedgerow trees, and in some cases require any felling of the Amended woodland south-west of the NG (e.g. line route sections 1 and 3) existing plantation Development, including hub. woodland edge trees. Line route woodland. trees that may have section 9a passes through 5.9ha of potential for bats. This tree woodland on the Welsh National loss may result in potential Forest Inventory although no habitat loss for bats. mature trees would be felled. Environment Proposed Grid Connection al Topics Connection to Welshpool, as outlined in Scenario 1, plus a 132 kV HDWP from SSA C to SSA B and (at least) one circuit to Legacy SSA C Windfarms to Llandinam SP Manweb Llandinam Route to SSA B Windfarms to 132kV Substation at Cefn Coch 132kV HDWP from Summary of Environmental Effects Route/Substation at Cefn Coch Collector Welshpool Substation at Cefn Coch (Located at Preferred National Grid Substation at Cefn (Route Options CC1, CC2, CC3 and Substation: Option (Route Options BNC 3, BNC 4, Substation Location NW at Cefn Coch) Coch (SSA B) to CC4: Line Route Sections 1-2a-3- A BNC 5: Line Route Sections 1 - Legacy 4b-5-6a-7a-8-9a-10) 2b) Geology and Not included in Reference 3. Not included in Llandinam Route to Not included in Reference 1. Not included in Reference 3. No environmental This topic has not been included in the Soils Reference 3. Welshpool (Chapter 11 information environmental assessments or reports of Ref. 2) available. for the routes included in this scenario. No significant environmental effects are anticipated on geology or soil resources. On this basis, the decision was made to not make this topic the subject of a detailed environmental impact assessment. Historic CC1, CC2, CC3 and CC4: Line SP Manweb Llandinam Route to BNC 3, 4 and 5 - line route Preferred Substation Location NW No environmental Two designated features (SAMs) are Environment Route Sections 1-2a-3-4b-5-6a- Collector Welshpool (Chapter 8 section 1 (page 87 of Ref. 1) (Section 10.2 of Ref. 3) information located within the Llandinam route and 7a-8-9a-10 (Appendix 6.1 of Substation: Option of Ref. 2) SAMs - There is 1 SAM within The site is located in an area where available. one within the SP MWC BNC route. The Ref. 1) A (Tables 6.4 and The proposed overhead the route but none within 2km. there are no key local receptors, but it Llandinam Route and other routes SAMs - The northen area of the 6.5 of Ref. 1) line from the Llandinam is located roughly equidistant between included in this scenario pass within 1- route contains more SAMs that are Undesignated Repowering Wind Farm to The proximity of the scheduled a scheduled Kerb Cairn (WSM MG 327), 2km of other historic assets, including: within 2km of the route. For Archaeology - An the Welshpool Grid Bon-y-maen root store and on a scheduled stone circle (WSM MG SAMs, Conservation Areas, Listed example, no SAMs are located undesignated site of Substation, some 35 km the farm of which it forms a 179), and a root store (WSM MG 218). Buildings (primarily lower grade II but within line route section 1 but 24 historical interest (a long, adopts a course to part will form a key These sites are situated approximately also including higher grade), historic SAMs lie in 14 groups within 2km of single storey derelict the south and east of the consideration for the detailed 2km away from the substation, and landscapes, Registered Historic Parks the route and line route sections stone building) lies Severn Valley which takes line design stage and effects on outside of any identified areas of and Gardens and undesignated below- 2a-5 have no SAMs within 2km of immediately adjacent it past and through some its setting will form a key theoretical visibility. However, whilst ground sites/features. Mitigation the route. Whereas line route to the site to the of the richest cultural consideration during the EIA the substation site will not be visible measures will be deployed to minimise sections 6a-10 all have SAMs northeast. heritage landscapes in mid stage. from any of these monuments, the direct effects on features, however located within 2km of the route. Wales. proposed overhead line is potentially significant effects on the setting of a Listed Buildings (LBs) - There visible from the root store and may number of features are predicted. Virtually all the SAMs are There are 55 SAMs located are no LBs within the route have a slightly adverse effect upon its prehistoric burial and ritual within 2km of the section. There are 2 LBs within landscape context. Only the Llandinam route passes through monuments, some with wide- overhead line, two of them 2km of it, both of lower grade a Registered Historic Landscape resulting ranging views, others are rare (Crugyn Bank Dyke and II. An undesignated group of pillow in significant effects. prehistoric house sites. Bryn Cwmyrhiwdre Round mounds (WNMR 9448) of regional Barrow) within the 100m Undesignated Archaeology - importance is located to the south east. Listed Buildings (LBs) - All line wide corridor. There are There are 2 undesignated Whilst the substation site will not be route sections, apart from 9a and also 452 Listed Buildings, archaeological features in the visible, the proposed overhead lines 10 are within 2km of LBs, the five Registered Historic route section. Direct effects will into and out of the substation, are majority of which are lower grade Parks and Gardens, seven be avoided, where possible, potentially visible and may have a II. However, some line route Conservation Areas, and during detailed design. slightly adverse effects upon their sections (e.g. 5) have LBs of higher one of Wales’ Registered landscape context. grade II* designated status. LBs Historic Landscapes would BNC 3, 4 and 5 - line route that are within close proximity (i.e. be crossed by the section 2b (page 87 of Ref. 150m) of the route such as proposed overhead line. 1) Ystradfaelog which is the higher SAMs - There are no SAMs grade II* building along line route It is the heritage assets within the route but two within section 5, could be the possibility of within the 100 m wide 2km, the Bon-y-maen root visual impact. corridor that are most at store and Y Capel stone circle. risk from the proposed Conservation Areas - Only line overhead line and could be Listed Buildings (LBs) - There route section 3 is located within adversely affected by its are no Listed Buildings within 2km of a Conservation Area, which construction. Most of 2km of the route section. is Llanidloes Conservation Area. these are considered to be of low (local) or even Undesignated Archaeology - Registered Historic Landscapes negligible value, but there There are no undesignated (RHLs) - Line route sections 2a, 3, are some of medium archaeological features in the 5 and 6a are within 1-2km of (regional) significance, as route section. Clywedog Valley RHL and/or well as the few of high Caersws Basin RHL. (national) importance. Environment Proposed Grid Connection al Topics Connection to Welshpool, as outlined in Scenario 1, plus a 132 kV HDWP from SSA C to SSA B and (at least) one circuit to Legacy SSA C Windfarms to Llandinam SP Manweb Llandinam Route to SSA B Windfarms to 132kV Substation at Cefn Coch 132kV HDWP from Summary of Environmental Effects Route/Substation at Cefn Coch Collector Welshpool Substation at Cefn Coch (Located at Preferred National Grid Substation at Cefn (Route Options CC1, CC2, CC3 and Substation: Option (Route Options BNC 3, BNC 4, Substation Location NW at Cefn Coch) Coch (SSA B) to CC4: Line Route Sections 1-2a-3- A BNC 5: Line Route Sections 1 - Legacy 4b-5-6a-7a-8-9a-10) 2b) Undesignated Archaeology - Appropriate mitigation Undesignated archaeological (e.g. preservation in situ, features are located along most line preservation by record, route sections. Direct effects will be excavation, evaluation, avoided, where possible, during watching brief) including detailed design. the careful demarcation of assets is suggested which should ensure that damage is kept to a minimum during the erection of the supports.

Land Use CC1, CC2, CC3 and CC4: Line No environmental Not covered in Reference BNC 3, 4 and 5 - line route Not included in Reference 4. No environmental It is not possible to draw conclusions Route Sections 1-2a-3-4b-5-6a- information was 2. section 1 (pages 87 and 88 information from the environmental information 7a-8-9a-10 (Appendix 6.1 of covered for this of Ref. 1) available. available, as all of the routes have not Ref. 1) topic. Open space and Green considered this topic. Open space and Green Infrastructure - Route 1 routes Infrastructure - Line route section 1 across approximately 1,766m crosses one area of Open Country of open access land. access and lies within 1km of one other, and within 1km of two areas BNC 3, 4 and 5 - line route of Registered Common Land. section 2b (pages 87 and 88 of Ref. 1) Open space and Green Infrastructure - 2b routes across approximately 694m of open access land. Landscape CC1, CC2, CC3 and CC4: Line SP Manweb Llandinam Route to BNC 3, 4 and 5 - line route Preferred Substation Location NW No environmental Landscape and visual effects are likely to and Route Sections 1-2a-3-4b-5-6a- Collector Welshpool (Chapter 6 of section 1 (page 87 of Ref. 1) (Section 10.2 of Ref. 3) information arise along the routes of this scenario, Visual 7a-8-9a-10 (Appendix 6.1 of Substation: Option Ref. 2) Landscape Sensitivity - Route 1 Whilst currently a substation in this available. however the effects will be localised and Amenity Ref. 1) A (Tables 6.4 and Any likely significant descends into the small- remote rural location would represent a will diminish rapidly with distance from Landscape and visual amenity 6.5 of Ref. 1) landscape or visual effects medium scale valley of the detracting urban element, which would the route. varies along the route. Along Landscape Sensitivity would arise during the Nant y Graig Lwyd. It traverses be inconsistent with the local landscape certain line route sections short - The open pasture operational stage from the a shoulder of moorland, character, this situation is likely to Localised significant effects have been sections of sky lining will occur landscape lies below localised loss of trees and remaining behind the ridge line change with the construction of the identified for visual receptors utilising a (e.g. line route section 2a), and the the higher moorland the introduction into the where possible. Between Tirgwynt wind farm and Mynydd Waen proportion of the footpaths, roads and line route sections will be visible as tops to the north and landscape of Cwmderwen and Cors yr Fawr wind farm (if constructed) as the residential properties sited close to the they drop down into valleys, such east above the A483. approximately 35 km of Ebolion it crosses medium to proposed substation would potentially routes of this scenario. as Afon Trannon Valley. However, The Ithon valley runs new overhead line on large-scale upland pasture. It be seen alongside above ground some line route sections are to the east of the site wood pole structures. The then passes across larger-scale equipment such as overhead electricity Overall, for the SSAC connection to provided with natural screening in but is relatively design and routing of the moorland plateau, avoiding the lines, pylons and the turbines of the Welshpool, effects are more likely for areas by existing hedgerow and shallow at this point. proposed overhead line highest ground where possible. Tirgwynt Wind farm and other planned landscape and visual receptors located riparian trees, and line route The moderate sized has been developed to wind farms. The Overall Visual and close to the southern sections of the sections, such as line route section pastoral fields are minimise its effects on the Visual Sensitivity - The parallel Sensory Evaluation (VS50) of the site proposed route. This is because this is 1, follow the field pattern, using often contained by landscape and visual wood pole lines may be seen is High. generally a more elevated area with field boundaries and shelter belts to coniferous shelter amenity of the area. on the skyline above Nant y lower levels of vegetation cover screen and backdrop the route. belts and larger Graig Lwyd from locations The ZTV suggests that a substation in consequently there would be greater woodland blocks, The location of the within Nant-yr-Eira. The lines this location may just be visible from potential visibility for the routes. In Line route sections, such as 6a, which both introduce Llandinam wind farm on will be backclothed by forestry Snowdonia National Park in the high comparison, the central and northern pass through relatively open man made elements the Waun Ddubarthog on the south side of Nant-yr- area of Mynydd Clywedog. This would sections of the Llandinam – Welshpool landscapes above the valley floor to the landscape and Ridge means that the Eira. Beyond Cors yr Ebolion be at a distance of 15km and it is likely route is routed through more diverse and will be visible in views across break up and contain route is more visible at the the plateau has few inward that the substation would be and enclosed landscape character types, valleys, although these views will views. The southern end of the views and wood poles are imperceptible from this distance. although the corollary is that these be back dropped by wooded slopes. substation is corridor, than further north unlikely to be seen. sections tend to be more populous, Line route section 6a will also be potentially visible where it merges into the The ZTV indicates that the site is therefore a greater number of receptors locally prominent as it runs around within the landscape more diverse and enclosed From the head of Nant Wythan, visually well contained due to the are likely. the Allt y Genlli hillside above due to its elevation landscape east of the 1 will be carried on steel surrounding landform which provides The SSAC connection to Cefn Coch will Tanyrallt. Also,in certain lcoations, and the relatively Severn Valley. However, towers. These may be visible in natural screening on three sides. Areas be visible as it crosses roads and within line route sections pass through open nature of the the use of wood pole longer views toward the of potential visibility are largely valleys and there are likely to be areas of ancient and semi-natural upland landscape. supports helps mitigate moorland, e.g. from Cwm restricted to the sparsely populated potential visual effects on a number of Environment Proposed Grid Connection al Topics Connection to Welshpool, as outlined in Scenario 1, plus a 132 kV HDWP from SSA C to SSA B and (at least) one circuit to Legacy SSA C Windfarms to Llandinam SP Manweb Llandinam Route to SSA B Windfarms to 132kV Substation at Cefn Coch 132kV HDWP from Summary of Environmental Effects Route/Substation at Cefn Coch Collector Welshpool Substation at Cefn Coch (Located at Preferred National Grid Substation at Cefn (Route Options CC1, CC2, CC3 and Substation: Option (Route Options BNC 3, BNC 4, Substation Location NW at Cefn Coch) Coch (SSA B) to CC4: Line Route Sections 1-2a-3- A BNC 5: Line Route Sections 1 - Legacy 4b-5-6a-7a-8-9a-10) 2b) woodland and scattered properties. However, the the effects within the more Llwyd to the south and from valley and surrounding hill slopes to residential properties. sensitivity of this open and elevated parts of the Banwy valley to the north. the north-east, including the lower Potential visual effects are possible landscape is the route. The towers will be partially slopes of Mynydd Waun Fawr, the Landscape and visual effects are likely for residential properties, such as medium-low, and screened/backclothed by Mynydd y Gribin ridgeline and Foel along line route section 1 of BNC 3, BNC Oakley Park, which will have views there is scope for Landscape Effects forestry at Mynydd Carreg-y- Fawr. 4 and BNC5. However, these elements of line route section 4b. Line route extension of the Although significant or big in some views. of this scenario will be screened from section 4b will also have further existing areas of borderline significant, all It is anticipated that there would be some receptors and directions and the effects on individual properties coniferous planting the effects were assessed Residential Visual Amenity - unrestricted and filtered views of the overhead line may potentially be seen along the route, notably at Red belts which contain as minor-moderate or The parallel wood pole lines development from Gwaenydd and alongside other above ground equipment House and Ty’n-y-celyn. views. The site moderate and none of the may be viewed from two potentially from a few other scattered such the turbines of the planned wind includes a belt of effects was assessed as properties at Cwmderwen, properties further afield. There would farms. Line route sections, such as line existing coniferous major. The only descending from high ground also be views from the public right of route section 1, will be visible as planting on its landscape along the route into Nant-yr-Eira. These way network, but no views from the Effects are likely for landscape and visual they cross roads (e.g. A483). southern edge which identified as experiencing properties would also overlook local lanes. In those locations where receptors around the substation at Cefn will both screen, and a moderate and therefore the crossing of the Afon Gam at the proposed substation is likely to be Coch than the SP Manweb Collector Effects on visitor attractions are provide a backdrop significant effect is relatively close range. There visible, it would potentially be seen Substation: Option A. It is anticipated unlikely to arise from the route for the substation between the A483 near may be views of the route from alongside above ground equipment that there would be unrestricted and beyond localised effects on public infrastructure. Old Neuadd Bank and Cae- Dolau-ceimion, although the such as overhead electricity lines, filtered views of the substation at Cefn footpaths. betin Wood, including the lines will be backclothed. pylons and the turbines of some of the Coch from the surrounding area, and it Residential Visual open hillside below the planned wind farms. would potentially be seen alongside Amenity - The area is Kerry Ridgeway Regional Visitor Attractions - No visitor above ground equipment such as sparsely populated Trail. Other areas of attractions have been identified The visual effects arising from a overhead electricity lines and the with only four landscape (e.g. the Canlad that would be affected by substation in this location could be turbines of the planned wind farms. properties within Valley and the Severn BNC1. lessened by perimeter mounding 1km of the Valley) would experience supplemented by planting which could substation. Views minor-moderate effects Recreational Resource - The include a high proportion of conifers. from residential which would be borderline parallel wood pole lines would The proximity of the site to existing properties will be significant. be visible within Nant y Graig mature coniferous plantations and limited to the Lwyd and Nant yr Eira from the shelter belts provides a structural properties at Visual Effects Glyndwr Way, which passes planting context. However the Camnant Farm, Although significant or between 300-500m to the screening benefits would only be Camnant Bridge and verging on significant, all north. achieved in the long term as the one property to the the effects were assessed planting reached full maturity. Also the north-west. These as minor - moderate or BNC 3, 4 and 5 - line route entries and exit for the overhead lines views will be moderate and none of section 2b (page 87 of Ref. would have to kept free from tall screened in part by these effects was assessed 1) vegetation and views of the intervening as major. Landscape Sensitivity - Route infrastructure would potentially be vegetation. 2b crosses open moorland available at these points. In terms of settlements, plateau, largely comprising The distance of the some properties on the unenclosed grass moor. It sites from the A483, edge of Fron avoids the ridge to the north- the local landform, Bank/Cilcewydd, which lie west of the NG hub, keeping to and intervening within 500m of the the flatter ground to the south vegetation, reduces overhead line will of the high point above Gors- visibility from the experience a significant dyfwch (418m). road. change in their view, where there is no Visual Sensitivity - Steel towers Recreational screening afforded by will be visible in wider views of Resource - There is a landform, buildings or the moorland plateau. relatively dense vegetation. Of the many network of public individual properties Residential Visual Amenity - rights of way in the scattered throughout the The southward alignment of 2b vicinity of the site; study area, only those takes it further from the two local public close to the overhead line properties at Carreg-y-big and footpaths cross the will experience a Gwaenydd, and the towers site but these can be significant change in their would be a lesser presence in diverted to an view some of which will views. existing track around have views of the Environment Proposed Grid Connection al Topics Connection to Welshpool, as outlined in Scenario 1, plus a 132 kV HDWP from SSA C to SSA B and (at least) one circuit to Legacy SSA C Windfarms to Llandinam SP Manweb Llandinam Route to SSA B Windfarms to 132kV Substation at Cefn Coch 132kV HDWP from Summary of Environmental Effects Route/Substation at Cefn Coch Collector Welshpool Substation at Cefn Coch (Located at Preferred National Grid Substation at Cefn (Route Options CC1, CC2, CC3 and Substation: Option (Route Options BNC 3, BNC 4, Substation Location NW at Cefn Coch) Coch (SSA B) to CC4: Line Route Sections 1-2a-3- A BNC 5: Line Route Sections 1 - Legacy 4b-5-6a-7a-8-9a-10) 2b) the site. There proposed overhead line. Visitor Attractions - There may would be views to However, the nature of the be views of the towers at the the site from the proposed overhead line, head of the upland valley as adjacent public combined with the seen from the outdoor centre footpaths and others screening effects of at Plas y drain, 1800m to the in the vicinity; landform and vegetation, north-east. however use of the mean that its effect will be footpaths does not limited, and no views Recreational Resource - No appear to be high. would create effects on recreational resources have residential amenity to the been identified that would be extent that they would affected by 2b. become an undesirable place to live.

Users of local public rights of way and open access areas will be variably affected. Where a pole is seen in close proximity to these areas (e.g. the public forest, footpaths and local access roads near Bryn-picca), the effect on visual amenity will be significant, although this effect will diminish rapidly with distance. Similarly, road users will be variably affected. Significant residual effects are noted for the A483 and B4355, although these effects would be localised and transient.

Lighting Not included in Reference 1. Not included in Llandinam Route to Not included in Reference 1. Not included in Reference 4. No environmental This topic has not been included in the Reference 1. Welshpool (Chapter 11 information environmental assessments or reports of Ref. 2) available. for the routes included in this scenario. No significant environmental effects are anticipated on lighting. On this basis, the decision was made to not make this topic the subject of a detailed environmental impact assessment. Environment Proposed Grid Connection al Topics Connection to Welshpool, as outlined in Scenario 1, plus a 132 kV HDWP from SSA C to SSA B and (at least) one circuit to Legacy SSA C Windfarms to Llandinam SP Manweb Llandinam Route to SSA B Windfarms to 132kV Substation at Cefn Coch 132kV HDWP from Summary of Environmental Effects Route/Substation at Cefn Coch Collector Welshpool Substation at Cefn Coch (Located at Preferred National Grid Substation at Cefn (Route Options CC1, CC2, CC3 and Substation: Option (Route Options BNC 3, BNC 4, Substation Location NW at Cefn Coch) Coch (SSA B) to CC4: Line Route Sections 1-2a-3- A BNC 5: Line Route Sections 1 - Legacy 4b-5-6a-7a-8-9a-10) 2b) Noise and As no line route option is As no line route Llandinam Route to As no line route option is Preferred Substation Location NW No environmental It is not possible to draw conclusions Vibration considered to have a greater or option is considered Welshpool (Chapter 11 considered to have a greater or (Section 10.2 of Ref. 3) information from the environmental information lesser effect in respect of this topic to have a greater or of Ref. 2) lesser effect in respect of this The nearest dwelling to the site is available. available, as all of the routes have not at this scale, this topic has not lesser effect in No significant topic at this scale, this topic approx 950m to the northeast. Rating considered this topic. been included as it does not assist respect of this topic environmental effects are has not been included as it levels below existing background levels in identifying a line route with least at this scale, this anticipated for noise. On does not assist in identifying a are achievable with standard noise environmental effect. This topic will topic has not been this basis, the decision was line route with least mitigation solutions. be considered at the EIA stage. included as it does made to not make this environmental effect. This topic (page 48 of Ref. 1) not assist in topic the subject of a will be considered at the EIA identifying a line detailed environmental stage. (page 48 of Ref. 1) route with least impact assessment. environmental effect. This is because of the low This topic will be intensity of construction considered at the EIA activities, the very low stage. (page 48 of volume of vehicle Ref. 1) movements which construction of the proposed overhead line would generate, the short- term (days rather than weeks) and reversible activities at each wood pole structure, and the proven methods of noise control at construction sites.

The operational stage would be expected to have a moderately significant effect upon tourism accommodation at two sites namely the Tavern Caravan Park and Edderton Hall B&B/Guest House. If proposed mitigation is accepted the residual effects would become not significant at Tavern Caravan Park but remain moderately significant for Edderton Hall B&B/Guest House. Traffic and CC1, CC2, CC3 and CC4: Line SP Manweb Llandinam Route to BNC 3, 4 and 5 - line route Preferred Substation Location NW No environmental Most routes/sites in this scenario are Transport Route Sections 1-2a-3-4b-5-6a- Collector Welshpool (Chapter 11 section 1 (page 88 of Ref. 1) (Section 10.2 of Ref. 3) information accessible by existing farm tracks or 7a-8-9a-10 (Appendix 6.1 of Substation: Option of Ref. 2) Access to the route will be via The site will require a significant length available. main public roads. However, localised Ref. 1) A (Tables 6.4 and No significant existing forest tracks across of new access road from New Road. instances may occur where the terrain The line route sections could be 6.5 of Ref. 1) environmental effects are steep ground. makes access difficult, or lengths of new accessed by existing public roads The site is accessible anticipated on traffic and access road are required. and farm tracks in most cases, from existing farm transport. On this basis, BNC 3, 4 and 5 - line route however a small number of the line tracks. the decision was made to section 2b (page 88 of Ref. route sections (e.g. 2a, 3, 7a) not make this topic the 1) would have to be accessed via subject of a detailed Access to the route will be via fields involving crossing some environmental impact existing forest tracks across existing hedgerows between fields. assessment. steep ground. Also, the steep terrain and lack of existing tracks will need to be The main issue of concern taken account of for some line with respect to traffic route sections (e.g. 1 and 10). would be the creation of construction and maintenance accesses and then accessing otherwise inaccessible fields with construction vehicles. This would be set out in the Draft Construction and Method Statement as part of the planning conditions, Environment Proposed Grid Connection al Topics Connection to Welshpool, as outlined in Scenario 1, plus a 132 kV HDWP from SSA C to SSA B and (at least) one circuit to Legacy SSA C Windfarms to Llandinam SP Manweb Llandinam Route to SSA B Windfarms to 132kV Substation at Cefn Coch 132kV HDWP from Summary of Environmental Effects Route/Substation at Cefn Coch Collector Welshpool Substation at Cefn Coch (Located at Preferred National Grid Substation at Cefn (Route Options CC1, CC2, CC3 and Substation: Option (Route Options BNC 3, BNC 4, Substation Location NW at Cefn Coch) Coch (SSA B) to CC4: Line Route Sections 1-2a-3- A BNC 5: Line Route Sections 1 - Legacy 4b-5-6a-7a-8-9a-10) 2b) and would be developed in consultation with Powys Highways Authority. Waste As no line route option is As no line route Llandinam Route to As no line route option is Not included in Reference 3. No environmental This topic has not been included in the Management considered to have a greater or option is considered Welshpool (Chapter 11 considered to have a greater or information environmental assessments or reports lesser effect in respect of this topic to have a greater or of Ref. 2) lesser effect in respect of this available. for the routes included in this scenario. at this scale, this topic has not lesser effect in No significant topic at this scale, this topic been included as it does not assist respect of this topic environmental effects are has not been included as it in identifying a line route with least at this scale, this anticipated on waste does not assist in identifying a environmental effect. This topic will topic has not been management. On this line route with least be considered at the EIA stage. included as it does basis, the decision was environmental effect. This topic (page 48 of Ref. 1) not assist in made to not make this will be considered at the EIA identifying a line topic the subject of a stage. (page 48 of Ref. 1) route with least detailed environmental environmental effect. impact assessment. This topic will be considered at the EIA stage. (page 48 of Ref. 1) Water CC1, CC2, CC3 and CC4: Line SP Manweb Llandinam Route to BNC 3, 4 and 5 - line route Preferred Substation Location NW No environmental Flood risk is not expected to be an issue Environment Route Sections 1-2a-3-4b-5-6a- Collector Welshpool (Chapter 9 of section 1 (page 87 of Ref. 1) (Section 10.2 of Ref. 3) information for the routes included in this scenario. 7a-8-9a-10 (Appendix 6.1 of Substation: Option Ref. 2) Flood Risk - Route 1 crosses Flood Risk available. The routes will cross many tributaries, Ref. 1) A (Tables 6.4 and It is considered that, if the the Afon Gam flood zone north The site is 2km upstream of the limit of including rivers within SSSIs and SACs Water Quality - Line route section 1 6.5 of Ref. 1) mitigation measures of Cwmderwen. The Afon Gam EA fluvial flood mapping but given the however these can be spanned by wood crosses four tributaries of the River Flood Zones - A discussed above and is approximately 120m wide at location of this site at the top of a pole infrastructure and mitigation Wye SAC and River Ithon SSSI. narrow flood zone detailed fully in the Draft this point and will not pose a catchment, there is unlikely to be any measures will ensure their protection lies 0.3km to the Construction Method constraint to the route. flood risk associated with this site. As a during construction. Flood Risk - Line route sections 1, north and 0.7km to Statement are successfully small watercourse flows through the 3, 4b, 5, and 6a cross flood zones the east of the site. implemented, the BNC 3, 4 and 5 - line route site details will need to be developed (including: the River Ithon flood It is less than 50m construction, operation section 2b (page 87 of Ref. as to how it is to be managed e.g. zone, Severn Valley flood zone, and wide and will not be and decommissioning 1) culverted, bunded etc. the Adon Trannon flood zone) and affected by the effects of the proposed Flood Risk - 2b does not cross tributaries within these flood zones, substation. overhead line on any flood zone. Wa ter Resources and Quality which may form a constraint to hydrology, groundwater, No licensed or unlicensed public or routeing in some locations. flood risk and water quality private water supplies or abstractions would not result in any are located within the area or within likely significant adverse 500m of the site. long term effects. As a series of small streams drain the site area, there is a potentially low risk for minor effect to both the surface water flows and quality, with the proposed substation potentially affecting both ground water recharge and surface run-off characteristics within the site area. Technical CC1, CC2, CC3 and CC4: Line SP Manweb Not covered in Reference BNC 3, 4 and 5 - line route Preferred Substation Location NW No environmental This information is not applicable to the Review Route Sections 1-2a-3-4b-5-6a- Collector 2. section 1 (page 88 of Ref. 1) (Section 10.2 of Ref. 3) information summary of effects as it has been 7a-8-9a-10 (Appendix 6.1 of Substation: Option Existing and Proposed OHL The site sits within a shallow valley available. included for reference only. Ref. 1) A (Tables 6.4 and Infrastructure 33kV and 132kV with ground levels rising steeply Existing and Proposed OHL 6.5 of Ref. 1) - This route would be crossed towards the southern part of the site. Infrastructure 33kV and 132kV - This site could by the Nant y Moch Wind Farm To create a development plateau, some This route would cross existing accommodate the OHL route. earthworks will be required. 33kV OHL at certain line route required equipment. Earthworks should be easier in Glacial sections, however, this could be Existing and Proposed Wind soils than, although the thickness of undergrounded. Turbines - The route passes these is unknown. If required, cutting within proximity of a number of operations through sandstone bedrock Existing and Proposed Wind turbines, however the required will likely necessitate the use of Environment Proposed Grid Connection al Topics Connection to Welshpool, as outlined in Scenario 1, plus a 132 kV HDWP from SSA C to SSA B and (at least) one circuit to Legacy SSA C Windfarms to Llandinam SP Manweb Llandinam Route to SSA B Windfarms to 132kV Substation at Cefn Coch 132kV HDWP from Summary of Environmental Effects Route/Substation at Cefn Coch Collector Welshpool Substation at Cefn Coch (Located at Preferred National Grid Substation at Cefn (Route Options CC1, CC2, CC3 and Substation: Option (Route Options BNC 3, BNC 4, Substation Location NW at Cefn Coch) Coch (SSA B) to CC4: Line Route Sections 1-2a-3- A BNC 5: Line Route Sections 1 - Legacy 4b-5-6a-7a-8-9a-10) 2b) Turbines - Line route section 1 distance from turbines can be hydraulic breakers or blasting. passes within proximity of turbines; maintained during the detailed however it will be possible to design stage. A watercourse runs through the centre maintain the required distance. of the site from West to East and will Line route sections 9a and 10 also Altitude and Topography - The need diverting using surface ditches. pass within proximity of turbines route would start at a height of but it may not be possible to 340m, reducing to 260m at the maintain the required distance for Afon Gam before increasing in line route section 9a. height to 380m. Gradients would be 0-150. Altitude and Topography - The altitude and topography varies BNC 3, 4 and 5 - line route throughout the route, as section 2b (page 88 of Ref. demonstrated from the examples 1) detailed below: Existing and Proposed OHL Infrastructure 33kV and 132kV Line route section 1: The eastern - This route would be crossed end of this route would cover by the Nant y Moch OHL route. altitudes of up to 455m at the substation at Llanbadarn Fynydd. Existing and Proposed Wind Moving west, the land height is Turbines - The route passes 373m at the Neuadd Goch within proximity of a number of substation. As the line moves potential turbines, and it may south-west, land heights increase not be possible to maintain the to around 420m at Llaithddu and required distance at the then higher to around 550m at eastern end. Hirddywel. Gradients range between 0-15°. As the line passes Altitude and Topography - The west of Hirddywel, there is a land height increases from section of land with a gradient of 360m to 410m before reducing between 15-22°. The height of land to 370m at the substation. then reduces to around 320m as Gradients are between 0-150. the route moves west before turning north.

Line route section 5 : Route 5 runs north-south over land heights between 170 – 300m. The northern section crosses gradients of between 15 -220.

Line route section 9a : The southern section of 9a crosses a section of land with a gradient of 15 to 220. As it moves north, land heights range from 420m to 370m before increasing again to 440m.

References (Ref.):

(1) SP MANWEB (Sept 2013). SP Mid Wales Connections, Line Routing Methodology & Appraisal - Phase 3 Report.

(2) SP MANWEB (Oct 2013). Volume 1: New 132kV Overhead Line Connection from Llandinam Wind Farm to Welshpool Substation - Updated Environmental Statement.

(3) National Grid (Sept 2013). Mid Wales Connection Project, Draft Substation Site Report.

(4) National Grid (Sept 2013). Mid Wales Connection Project, Draft Route Report.

Table E: Scenario 4 - 132 kV HDWP circuit to Welshpool from SSA B

Environmental Proposed Grid Connection Topics 132 kV HDWP circuit to Welshpool from SSA B SSA B Windfarms to Substation at Cefn Coch 132kV HDWP circuit from Substation at Summary of Effects (Route Options BNC 3, BNC 4, BNC 5: Line Route Sections 1 - 2b) Cefn Coch (SSA B) to Welshpool Air Quality and As no line route option is considered to have a greater or lesser effect in respect of this topic at this scale, this topic has not been included as No environmental information available. Not applicable for this scenario. Emissions (incl. it does not assist in identifying a line route with least environmental effect. This topic will be considered at the EIA stage. (page 48 of Ref. 1) dust) Ecology/Biodiversity BNC 3, 4 and 5 - line route section 1 (page 87 of Ref. 1) No environmental information available. Not applicable for this scenario. and Geological Wind farm Habitat Management Plan Area (HMP) - The route passes through the Llanbrynmair Wind Farm HMP At its very eastern extent, the Conservation route borders provisional areas set out for the Tirgwynt HMP.

Peatland Habitats - The route passes through potential peat habitat to the south and east of Llanbrynmair Wind Farm, along the northern boundary of the woodland.

Ornithological ‘Hot Spots’ - There are no ornithological hotspots associated with the route; however the Foel Quarry hotspot is approximately 360m to the south.

BNC 3, 4 and 5 - line route section 2b (page 87 of Ref. 1) Wind farm Habitat Management Plan Area (HMP) - Approx. 700m of the route passes through provisional areas set out for the Tirgwynt HMP.

Peatland Habitats - No potential peat areas were identified within the route.

Ornithological ‘Hot Spots’ - Approximately 450m of the route passes through the Foel Quarry ornithological hotspot.

Climate Change As no line route option is considered to have a greater or lesser effect in respect of this topic at this scale, this topic has not been included as No environmental information available. Not applicable for this scenario. it does not assist in identifying a line route with least environmental effect. This topic will be considered at the EIA stage. (page 48 of Ref. 1)

Electric and As no line route option is considered to have a greater or lesser effect in respect of this topic at this scale, this topic has not been included as No environmental information available. Not applicable for this scenario. Magnetic Fields it does not assist in identifying a line route with least environmental effect. This topic will be considered at the EIA stage. (page 48 of Ref. 1)

Forestry and BNC 3, 4 and 5 - line route section 1 (page 87 of Ref. 1) No environmental information available. Not applicable for this scenario. Woodland Other Forestry and Woodland - Route 1 will pass through c.320m of mature coniferous plantation above Nant y Graig Lwyd, and c.730m of mature coniferous plantation at Cors yr Ebolion. Native trees along the Nant y Graig Lwyd may be affected by the lines.

BNC 3, 4 and 5 - line route section 2b (page 87 of Ref. 1) Other Forestry and Woodland - 2b may affect small stands of woodland south-west of the NG hub.

Geology and Soils Not included in Reference 1. No environmental information available. Not applicable for this scenario. Historic BNC 3, 4 and 5 - line route section 1 (page 87 of Ref. 1) No environmental information available. Not applicable for this scenario. Environment SAMs - There is 1 SAM within the route but none within 2km.

The proximity of the scheduled Bon-y-maen root store and on the farm of which it forms a part will form a key consideration for the detailed line design stage and effects on its setting will form a key consideration during the EIA stage.

Listed Buildings (LBs) - There are no LBs within the route section. There are 2 LBs within 2km of it, both of lower grade II.

Undesignated Archaeology - There are 2 undesignated archaeological features in the route section. Direct effects will be avoided, where possible, during detailed design.

BNC 3, 4 and 5 - line route section 2b (page 87 of Ref. 1) SAMs - There are no SAMs within the route but two within 2km, the Bon-y-maen root store and Y Capel stone circle.

Listed Buildings (LBs) - There are no Listed Buildings within 2km of the route section.

Undesignated Archaeology - There are no undesignated archaeological features in the route section. Environmental Proposed Grid Connection Topics 132 kV HDWP circuit to Welshpool from SSA B SSA B Windfarms to Substation at Cefn Coch 132kV HDWP circuit from Substation at Summary of Effects (Route Options BNC 3, BNC 4, BNC 5: Line Route Sections 1 - 2b) Cefn Coch (SSA B) to Welshpool Land Use BNC 3, 4 and 5 - line route section 1 (pages 87 and 88 of Ref. 1) No environmental information available. Not applicable for this scenario. Open space and Green Infrastructure - Route 1 routes across approximately 1,766m of open access land.

BNC 3, 4 and 5 - line route section 2b (pages 87 and 88 of Ref. 1) Open space and Green Infrastructure - 2b routes across approximately 694m of open access land.

Landscape and BNC 3, 4 and 5 - line route section 1 (page 87 of Ref. 1) No environmental information available. Not applicable for this scenario. Visual Amenity Landscape Sensitivity - Route 1 descends into the small-medium scale valley of the Nant y Graig Lwyd. It traverses a shoulder of moorland, remaining behind the ridge line where possible. Between Cwmderwen and Cors yr Ebolion it crosses medium to large-scale upland pasture. It then passes across larger-scale moorland plateau, avoiding the highest ground where possible.

Visual Sensitivity - The parallel wood pole lines may be seen on the skyline above Nant y Graig Lwyd from locations within Nant-yr-Eira. The lines will be backclothed by forestry on the south side of Nant-yr-Eira. Beyond Cors yr Ebolion the plateau has few inward views and wood poles are unlikely to be seen.

From the head of Nant Wythan, 1 will be carried on steel towers. These may be visible in longer views toward the moorland, e.g. from Cwm Llwyd to the south and from the Banwy valley to the north. The towers will be partially screened/backclothed by forestry at Mynydd Carreg-y- big in some views.

Residential Visual Amenity - The parallel wood pole lines may be viewed from two properties at Cwmderwen, descending from high ground into Nant-yr-Eira. These properties would also overlook the crossing of the Afon Gam at relatively close range. There may be views of the route from Dolau-ceimion, although the lines will be backclothed.

Visitor Attractions - No visitor attractions have been identified that would be affected by BNC1.

Recreational Resource - The parallel wood pole lines would be visible within Nant y Graig Lwyd and Nant yr Eira from the Glyndwr Way, which passes between 300-500m to the north.

BNC 3, 4 and 5 - line route section 2b (page 87 of Ref. 1) Landscape Sensitivity - Route 2b crosses open moorland plateau, largely comprising unenclosed grass moor. It avoids the ridge to the north- west of the NG hub, keeping to the flatter ground to the south of the high point above Gors-dyfwch (418m).

Visual Sensitivity - Steel towers will be visible in wider views of the moorland plateau.

Residential Visual Amenity - The southward alignment of 2b takes it further from the properties at Carreg-y-big and Gwaenydd, and the towers would be a lesser presence in views.

Visitor Attractions - There may be views of the towers at the head of the upland valley as seen from the outdoor centre at Plas y drain, 1800m to the north-east.

Recreational Resource - No recreational resources have been identified that would be affected by 2b.

Lighting Not included in Reference 1. No environmental information available. Not applicable for this scenario. Noise and Vibration As no line route option is considered to have a greater or lesser effect in respect of this topic at this scale, this topic has not been included as No environmental information available. Not applicable for this scenario. it does not assist in identifying a line route with least environmental effect. This topic will be considered at the EIA stage. (page 48 of Ref. 1)

Socio Economics As no line route option is considered to have a greater or lesser effect in respect of this topic at this scale, this topic has not been included as No environmental information available. Not applicable for this scenario. (including Tourism it does not assist in identifying a line route with least environmental effect. This topic will be considered at the EIA stage. (page 48 of Ref. 1) and Recreation) Traffic and BNC 3, 4 and 5 - line route section 1 (page 88 of Ref. 1) No environmental information available. Not applicable for this scenario. Transport Access to the route will be via existing forest tracks across steep ground.

BNC 3, 4 and 5 - line route section 2b (page 88 of Ref. 1) Access to the route will be via existing forest tracks across steep ground.

Waste Management As no line route option is considered to have a greater or lesser effect in respect of this topic at this scale, this topic has not been included as No environmental information available. Not applicable for this scenario. it does not assist in identifying a line route with least environmental effect. This topic will be considered at the EIA stage. (page 48 of Ref. 1) Environmental Proposed Grid Connection Topics 132 kV HDWP circuit to Welshpool from SSA B SSA B Windfarms to Substation at Cefn Coch 132kV HDWP circuit from Substation at Summary of Effects (Route Options BNC 3, BNC 4, BNC 5: Line Route Sections 1 - 2b) Cefn Coch (SSA B) to Welshpool Water Environment BNC 3, 4 and 5 - line route section 1 (page 87 of Ref. 1) No environmental information available. Not applicable for this scenario. Flood Risk - Route 1 crosses the Afon Gam flood zone north of Cwmderwen. The Afon Gam is approximately 120m wide at this point and will not pose a constraint to the route.

BNC 3, 4 and 5 - line route section 2b (page 87 of Ref. 1) Flood Risk - 2b does not cross any flood zone. Technical Review BNC 3, 4 and 5 - line route section 1 (page 88 of Ref. 1) No environmental information available. Not applicable for this scenario. Existing and Proposed OHL Infrastructure 33kV and 132kV - This route would be crossed by the Nant y Moch Wind Farm OHL route.

Existing and Proposed Wind Turbines - The route passes within proximity of a number of turbines, however the required distance from turbines can be maintained during the detailed design stage.

Altitude and Topography - The route would start at a height of 340m, reducing to 260m at the Afon Gam before increasing in height to 380m. Gradients would be 0-150.

BNC 3, 4 and 5 - line route section 2b (page 88 of Ref. 1) Existing and Proposed OHL Infrastructure 33kV and 132kV - This route would be crossed by the Nant y Moch OHL route.

Existing and Proposed Wind Turbines - The route passes within proximity of a number of potential turbines, and it may not be possible to maintain the required distance at the eastern end.

Altitude and Topography - The land height increases from 360m to 410m before reducing to 370m at the substation. Gradients are between 0-150.

References (Ref.):

(1) SP MANWEB (Sept 2013). SP Mid Wales Connections, Line Routing Methodology & Appraisal - Phase 3 Report.

(2) SP MANWEB (Oct 2013). Volume 1: New 132kV Overhead Line Connection from Llandinam Wind Farm to Welshpool Substation - Updated Environmental Statement.

(3) National Grid (Sept 2013). Mid Wales Connection Project, Draft Substation Site Report.

(4) National Grid (Sept 2013). Mid Wales Connection Project, Draft Route Report.

Table F: Scenario 5 - 132 kV HDWP circuit to Legacy from SSA B, plus Llandinam Connection to Welshpool

Environmental Proposed Grid Connection Topics 132 kV HDWP circuit (124 MVA or 176 MVA) to Legacy from SSA B, plus Scenario 1 SSA C Windfarms to Llandinam SP Manweb Collector Llandinam Route to Welshpool SSA B Windfarms to Substation at Cefn 132kV HDWP circuit Summary of Effects Route Substation: Option A Coch from Substation at (Route Options CC1, CC2, CC3 and (Route Options BNC 3, BNC 4, BNC 5: Line Cefn Coch (SSA B) to CC4: Line Route Section 1) Route Sections 1 - 2b) Legacy Air Quality As no line route option is considered to As no line route option is Not covered in Reference 2. As no line route option is considered to have a No environmental It is not possible to draw and Emissions have a greater or lesser effect in considered to have a greater greater or lesser effect in respect of this topic information available. conclusions from the environmental (incl. dust) respect of this topic at this scale, this or lesser effect in respect of at this scale, this topic has not been included information available, as all of the topic has not been included as it does this topic at this scale, this as it does not assist in identifying a line route routes have not considered this not assist in identifying a line route topic has not been included with least environmental effect. This topic will topic. with least environmental effect. This as it does not assist in be considered at the EIA stage. (page 48 of topic will be considered at the EIA identifying a line route with Ref. 1) stage. (page 48 of Ref. 1) least environmental effect. This topic will be considered at the EIA stage. (page 48 of Ref. 1) Ecology/Biodi CC4, CC1 and CC3: Line route SP Manweb Collector Llandinam Route to Welshpool BNC 3, 4 and 5 - line route section 1 (page No environmental Birds: There are a number of versity and section 1 (page 91 of Ref. 1) Substation: Option A (Chapter 7 of Ref. 2) 87 of Ref. 1) information available. ornithological 'hot-spots' in Geological Wind farm Habitat Management Plan (Tables 6.4 and 6.5 of It is considered that the proposed Wind farm Habitat Management Plan Area proximity to the proposed routes, Conservation Area (HMP) - The route passes through Ref. 1) overhead line is not likely to result in (HMP) - The route passes through the whereby there is potential for larger several HMP areas associated with SAC - The River Wye SAC any significant adverse long-term Llanbrynmair Wind Farm HMP At its very species, (such as swans) to collide Hirddywell Wind Farm. headwaters lie 0.75km to effects. If the mitigation measures eastern extent, the route borders provisional with overhead lines which presents the south east of the site discussed in Chapter 7 (Ref. 2) are fully areas set out for the Tirgwynt HMP. a long-term permanent hazard to Protected Species - The route passes with associated freshwater implemented any risk of adverse effects birds, however the use of bird through a small potential protected sensitivities. will be further reduced. Peatland Habitats - The route passes through deflectors is likely to reduce this species hotspot at Custogion. Two potential peat habitat to the south and east of risk. further potential protected species SSSI - The site lies less than The potential for collisions with overhead Llanbrynmair Wind Farm, along the northern hotspots are located within 2km of the 1km from Gweunydd lines is probably the most significant boundary of the woodland. Designated Sites: No designated route. Camnant SSSI, designated effect likely to arise. This represents a sites are likely to be directly for habitats, the River Ithon long-term, permanent hazard to certain Ornithological ‘Hot Spots’ - There are no affected by the proposed grid Peatland Habitats - The route passes SSSI and the groups of birds, primarily the larger ornithological hotspots associated with the connections, however there are a through two large areas of potential Esgairdraenllwyn Pastures species such as swans and to a lesser route; however the Foel Quarry hotspot is number of designated site which lie peat. It also passes through areas SSSI, designated for extent the smaller wildfowl. However, approximately 360m to the south. in proximity to the routes. identified in Environmental Statements habitats. the erection of bird deflectors in as supporting peat habitats. appropriate locations will reduce the risk BNC 3, 4 and 5 - line route section 2b Habitat Management Plans: Due to of birds colliding with the overhead line, (page 87 of Ref. 1) the location of the wind farm Ornithological ‘Hot Spots’ - The route is and the erection of devices to discourage Wind farm Habitat Management Plan Area substations the routes will pass not associated with any ornithological or prevent roosting on wood pole (HMP) - Approx. 700m of the route passes through a number of wind farm HMP hotspots; however the Tylwch tip supports will reduce the risk of predation through provisional areas set out for the areas. hotspot is approx. 400m to the north- on ground nesting birds. Tirgwynt HMP. west. Protected Species: Protected Peatland Habitats - No potential peat areas species are likely to be located in Sites Designated for Nature were identified within the route. proximity to the routes. However Conservation Importance (SPA, SAC, full compliance with relevant SSSI) - The route does not pass Ornithological ‘Hot Spots’ - Approximately protected species legislation is likely through any statutory designated sites; 450m of the route passes through the Foel to help to minimise any effects. however several designated areas are Quarry ornithological hotspot. within a 2km radius, including the Peatland Habitats: A number of the River Wye SAC. The closest site is the routes pass through areas of Gweunydd Camnant SSSI, approx. potential peatland habitat. 55m to the north. Climate As no line route option is considered to As no line route option is Not covered in Reference 2. As no line route option is considered to have a No environmental This topic has not been included in Change have a greater or lesser effect in considered to have a greater greater or lesser effect in respect of this topic information available. the environmental assessments or respect of this topic at this scale, this or lesser effect in respect of at this scale, this topic has not been included reports for the routes included in topic has not been included as it does this topic at this scale, this as it does not assist in identifying a line route this scenario. not assist in identifying a line route topic has not been included with least environmental effect. This topic will with least environmental effect. This as it does not assist in be considered at the EIA stage. (page 48 of topic will be considered at the EIA identifying a line route with Ref. 1) stage. (page 48 of Ref. 1) least environmental effect. This topic will be considered at the EIA stage. (page 48 of Ref. 1) Environmental Proposed Grid Connection Topics 132 kV HDWP circuit (124 MVA or 176 MVA) to Legacy from SSA B, plus Scenario 1 SSA C Windfarms to Llandinam SP Manweb Collector Llandinam Route to Welshpool SSA B Windfarms to Substation at Cefn 132kV HDWP circuit Summary of Effects Route Substation: Option A Coch from Substation at (Route Options CC1, CC2, CC3 and (Route Options BNC 3, BNC 4, BNC 5: Line Cefn Coch (SSA B) to CC4: Line Route Section 1) Route Sections 1 - 2b) Legacy Electric and As no line route option is considered to As no line route option is Llandinam Route to Welshpool As no line route option is considered to have a No environmental This topic has not been included in Magnetic have a greater or lesser effect in considered to have a greater (Chapter 11 of Ref. 2) greater or lesser effect in respect of this topic information available. the environmental assessments or Fields respect of this topic at this scale, this or lesser effect in respect of No significant environmental effects are at this scale, this topic has not been included reports for the routes included in topic has not been included as it does this topic at this scale, this anticipated on electric and magnetic as it does not assist in identifying a line route this scenario. not assist in identifying a line route topic has not been included fields. On this basis, the decision was with least environmental effect. This topic will with least environmental effect. This as it does not assist in made to not make this topic the subject be considered at the EIA stage. (page 48 of topic will be considered at the EIA identifying a line route with of a detailed environmental impact Ref. 1) stage. (page 48 of Ref. 1) least environmental effect. assessment. This topic will be considered at the EIA stage. (page 48 of Ref. 1) Forestry and CC4, CC1 and CC3: Line route SP Manweb Collector Llandinam Route to Welshpool BNC 3, 4 and 5 - line route section 1 (page No environmental Some trees and hedgerows will be Woodland section 1 (page 93 of Ref. 1) Substation: Option A (Chapter 7 of Ref. 2) 87 of Ref. 1) information available. lost to facilitate construction of the Ancient and Semi-Natural woodland (Tables 6.4 and 6.5 of It is considered that the proposed Other Forestry and Woodland - Route 1 will grid connection routes. The loss of (ASNW) - Route 1 affects one area of Ref. 1) overhead line is not likely to result in pass through c.320m of mature coniferous trees may result in potential habitat ASNW adjacent to Llwydiarth Wood Other Forestry and any significant adverse long-term plantation above Nant y Graig Lwyd, and loss for bats, although this is which will be avoided, where possible, Woodland - There are a effects. If the mitigation measures c.730m of mature coniferous plantation at Cors expected to be a localised effect. at detailed design stage. number of small blocks of discussed in Chapter 7 (Ref. 2) are fully yr Ebolion. Native trees along the Nant y Graig forestry and shelter belt implemented any risk of adverse effects Lwyd may be affected by the lines. In some locations, mature trees as Other Forestry and Woodland - Route 1 planting located within the will be further reduced. well as Ancient and Semi-Natural crosses some areas of narrow shelter vicinity of the substation site BNC 3, 4 and 5 - line route section 2b woodland may be affected by planting with potential felling required which will screen and Some trees will be lost to facilitate (page 87 of Ref. 1) construction of the proposed routes. on higher ground, for example around backdrop the proposed construction of the Amended Other Forestry and Woodland - 2b may affect Although this will be avoided where Ddullui Bank. substation. The site will not Development, including trees that may small stands of woodland south-west of the NG possible at the detailed design require any felling of have potential for bats. This tree loss hub. stage, limited felling may be Within the Nant Feigion valley, felling existing plantation may result in potential habitat loss for required in some locations. of hedgerow and woodland edge trees woodland. bats. may be required. Geology and Not included in Reference 3. Not included in Reference 3. Llandinam Route to Welshpool Not included in Reference 1. No environmental This topic has not been included in Soils (Chapter 11 of Ref. 2) information available. the environmental assessments or No significant environmental effects are reports for the routes included in anticipated on geology or soil resources. this scenario. On this basis, the decision was made to not make this topic the subject of a detailed environmental impact assessment. Historic CC4, CC1 and CC3: Line route SP Manweb Collector Llandinam Route to Welshpool BNC 3, 4 and 5 - line route section 1 (page No environmental Two designated features (SAMs) are Environment section 1 (pages 92 and 93 of Ref. Substation: Option A (Chapter 8 of Ref. 2) 87 of Ref. 1) information available. located within the Llandinam route 1) (Tables 6.4 and 6.5 of The proposed overhead line from the SAMs - There is 1 SAM within the route but and one within the SP MWC BNC SAMs - No SAMs are located within the Ref. 1) Llandinam Repowering Wind Farm to the none within 2km. route. The Llandinam Route and route. 24 SAMs in 14 groups lie within Undesignated Archaeology - Welshpool Grid Substation, some 35 km other routes included in this 2km of the route. An undesignated site of long, adopts a course to the south and The proximity of the scheduled Bon-y-maen scenario pass within 1-2km of other Virtually all the SAMs are prehistoric historical interest (a single east of the Severn Valley which takes it root store and on the farm of which it forms a historic assets, including: SAMs, burial and ritual monuments, some storey derelict stone past and through some of the richest part will form a key consideration for the Conservation Areas, Listed Buildings with wide-ranging views and group building) lies immediately cultural heritage landscapes in mid detailed line design stage and effects on its (primarily lower grade II but also values. adjacent to the site to the Wales. setting will form a key consideration during the including higher grade) , historic northeast. EIA stage. landscapes, Registered Historic Listed Buildings (LBs) - No Listed There are 55 SAMs located within 2km of Parks and Gardens and Buildings are located within the route. the overhead line, two of them (Crugyn Listed Buildings (LBs) - There are no LBs undesignated below-ground There are 10 Listed Buildings within Bank Dyke and Bryn Cwmyrhiwdre within the route section. There are 2 LBs within sites/features. Mitigation measures 2km, all of lower grade II. Round Barrow) within the 100m wide 2km of it, both of lower grade II. will be deployed to minimise direct corridor. There are also 452 Listed effects on features, however Conservation Areas - No Conservation Buildings, five Registered Historic Parks Undesignated Archaeology - There are 2 significant effects on the setting of a Areas are within 2km of the route and Gardens, seven Conservation Areas, undesignated archaeological features in the number of features are predicted. section. and one of Wales’ Registered Historic route section. Direct effects will be avoided, Landscapes would be crossed by the where possible, during detailed design. Only the Llandinam route passes Registered Historic Landscapes (RHLs) proposed overhead line. through a Registered Historic - No RHLs are within 2km of the route. BNC 3, 4 and 5 - line route section 2b Landscape resulting in significant It is the heritage assets within the 100 (page 87 of Ref. 1) effects. Environmental Proposed Grid Connection Topics 132 kV HDWP circuit (124 MVA or 176 MVA) to Legacy from SSA B, plus Scenario 1 SSA C Windfarms to Llandinam SP Manweb Collector Llandinam Route to Welshpool SSA B Windfarms to Substation at Cefn 132kV HDWP circuit Summary of Effects Route Substation: Option A Coch from Substation at (Route Options CC1, CC2, CC3 and (Route Options BNC 3, BNC 4, BNC 5: Line Cefn Coch (SSA B) to CC4: Line Route Section 1) Route Sections 1 - 2b) Legacy Undesignated Archaeology - There are m wide corridor that are most at risk SAMs - There are no SAMs within the route but 6 undesignated archaeological features from the proposed overhead line and two within 2km, the Bon-y-maen root store within the route; two of these are could be adversely affected by its and Y Capel stone circle. buildings and one a prehistoric cairn. construction. Most of these are Direct effects will be avoided, where considered to be of low (local) or even Listed Buildings (LBs) - There are no Listed possible, during detailed design. negligible value, but there are some of Buildings within 2km of the route section. medium (regional) significance, as well as the few of high (national) importance. Undesignated Archaeology - There are no Appropriate mitigation (e.g. preservation undesignated archaeological features in the in situ, preservation by record, route section. excavation, evaluation, watching brief) including the careful demarcation of assets is suggested which should ensure that damage is kept to a minimum during the erection of the supports.

Inevitably during the operational life of the proposed overhead line, it would have an indirect visual effect on a significant number of designated and registered assets. In a few cases, around six in number, that effect is likely to be very large. It is difficult to identify how such visual effects might be reduced for the density of assets in this region is such that any route adopted would be likely to generate visual issues. These are long-term temporary effects which would last for the operational life of the proposed overhead line but which would be completed removed once the proposed overhead line has been decommissioned. Environmental Proposed Grid Connection Topics 132 kV HDWP circuit (124 MVA or 176 MVA) to Legacy from SSA B, plus Scenario 1 SSA C Windfarms to Llandinam SP Manweb Collector Llandinam Route to Welshpool SSA B Windfarms to Substation at Cefn 132kV HDWP circuit Summary of Effects Route Substation: Option A Coch from Substation at (Route Options CC1, CC2, CC3 and (Route Options BNC 3, BNC 4, BNC 5: Line Cefn Coch (SSA B) to CC4: Line Route Section 1) Route Sections 1 - 2b) Legacy Land Use CC4, CC1 and CC3: Line route No environmental Not covered in Reference 2. BNC 3, 4 and 5 - line route section 1 No environmental It is not possible to draw section 1 (page 94 of Ref. 1) information was covered for (pages 87 and 88 of Ref. 1) information available. conclusions from the environmental Open space and Green Infrastructure - this topic. Open space and Green Infrastructure - Route 1 information available, as all of the Route 1 crosses one area of Open routes across approximately 1,766m of open routes have not considered this Country access and lies within 1km of access land. topic. one other, and within 1km of two areas of Registered Common Land. BNC 3, 4 and 5 - line route section 2b (pages 87 and 88 of Ref. 1) Open space and Green Infrastructure - 2b routes across approximately 694m of open access land. Landscape CC4, CC1 and CC3: Line route SP Manweb Collector Llandinam Route to Welshpool BNC 3, 4 and 5 - line route section 1 (page No environmental Landscape and visual effects are and section 1 (pages 91 and 92 of Ref. Substation: Option A (Chapter 6 of Ref. 2) 87 of Ref. 1) information available. likely to arise along the routes of Visual 1) (Tables 6.4 and 6.5 of Any likely significant landscape or visual Landscape Sensitivity - Route 1 descends into this scenario, however the effects Amenity Landscape Sensitivity - The route runs Ref. 1) effects would arise during the the small-medium scale valley of the Nant y will be localised and will diminish north-west from Llanbadarn across Landscape Sensitivity - The operational stage from the localised loss Graig Lwyd. It traverses a shoulder of rapidly with distance from the route. open pasture, below higher moorland open pasture landscape lies of trees and the introduction into the moorland, remaining behind the ridge line tops to the east and above the A483. below the higher moorland landscape of approximately 35 km of where possible. Between Cwmderwen and Cors Localised significant effects have Although visible in longer views from tops to the north and east new overhead line on wood pole yr Ebolion it crosses medium to large-scale been identified for visual receptors the west, the landscape is of medium above the A483. The Ithon structures. The design and routeing of upland pasture. It then passes across larger- utilising a proportion of the sensitivity due to its scale, blocks and valley runs to the east of the proposed overhead line has been scale moorland plateau, avoiding the highest footpaths, roads and residential belts of coniferous woodland and the site but is relatively developed to minimise its effects on the ground where possible. properties sited close to the routes existing wind farms. shallow at this point. The landscape and visual amenity of the of this scenario. moderate sized pastoral area. Visual Sensitivity - The parallel wood pole lines The route runs through the Ithon valley fields are often contained by may be seen on the skyline above Nant y Graig Overall, for the SSAC connection, but is relatively shallow at this point. coniferous shelter belts and The location of the Llandinam wind farm Lwyd from locations within Nant-yr-Eira. The effects are more likely for landscape larger woodland blocks, on the Waun Ddubarthog Ridge means lines will be backclothed by forestry on the and visual receptors located close to The route turns west, crossing the which both introduce man that the route is more visible at the south side of Nant-yr-Eira. Beyond Cors yr the southern sections of the A483 and Ithon valley across made elements to the southern end of the corridor, than Ebolion the plateau has few inward views and proposed route. This is because undulating higher land, with the 33kV landscape and break up and further north where it merges into the wood poles are unlikely to be seen. this is generally a more elevated line from Neuadd Goch Wind Farm contain views. The more diverse and enclosed landscape area with lower levels of vegetation meeting the line in the vicinity of substation is potentially east of the Severn Valley. However, the From the head of Nant Wythan, 1 will be cover consequently there would be Camnant, where a collector substation visible within the landscape use of wood pole supports helps mitigate carried on steel towers. These may be visible greater potential visibility for the will be required. The route drops down due to its elevation and the the effects within the more open and in longer views toward the moorland, e.g. from routes. In comparison, the central from the higher land at Hirddywel, relatively open nature of the elevated parts of the route. Cwm Llwyd to the south and from the Banwy and northern sections of the running cross slope just below the upland landscape. However, valley to the north. The towers will be partially Llandinam – Welshpool route is highest land at Pegwyn Bank and the sensitivity of this Landscape Effects screened/backclothed by forestry at Mynydd routed through more diverse and dropping down the steep scarp slope to landscape is medium-low, Although significant or borderline Carreg-y-big in some views. enclosed landscape character types, run west through the small Nant and there is scope for significant, all the effects were assessed although the corollary is that these Feigion valley, contained by steep extension of the existing as minor-moderate or moderate and Residential Visual Amenity - The parallel wood sections tend to be more populous, slopes and woodland blocks. areas of coniferous planting none of the effects was assessed as pole lines may be viewed from two properties therefore a greater number of belts which contain views. major. The only landscape along the at Cwmderwen, descending from high ground receptors are likely. Route 1 follows the field pattern, using The site includes a belt of route identified as experiencing a into Nant-yr-Eira. These properties would also field boundaries and shelter belts to existing coniferous planting moderate and therefore significant effect overlook the crossing of the Afon Gam at Landscape and visual effects are screen and backdrop the route. It will on its southern edge which is between the A483 near Old Neuadd relatively close range. There may be views of likely along line route section 1 of be visible in views in the generally will both screen, and Bank and Cae-betin Wood, including the the route from Dolau-ceimion, although the BNC 3, BNC 4 and BNC5. However, open landscape but these views will be provide a backdrop for the open hillside below the Kerry Ridgeway lines will be backclothed. these elements of this scenario will broken by existing planting and will substation infrastructure. Regional Trail. Other areas of landscape be screened from some receptors seldom skyline. (e.g. the Canlad Valley and the Severn Visitor Attractions - No visitor attractions have and directions and the overhead line Residential Visual Amenity - Valley) would experience minor- been identified that would be affected by may potentially be seen alongside The route follows local valleys as it The area is sparsely moderate effects which would be BNC1. other above ground equipment such descends from the higher ground, populated with only four borderline significant. the turbines of the planned wind contained by topography and woodland properties within 1km of the Recreational Resource - The parallel wood pole farms. planting. It will be visible intermittently substation. Views from Visual Effects lines would be visible within Nant y Graig Lwyd in longer views but will be set within residential properties will be Although significant or verging on and Nant yr Eira from the Glyndwr Way, which the landscape. limited to the properties at significant, all the effects were assessed passes between 300-500m to the north. Camnant Farm, Camnant as minor - moderate or moderate and Visual Sensitivity - Route 1 will be Bridge and one property to none of these effects was assessed as BNC 3, 4 and 5 - line route section 2b visible as it crosses the A483, including the north-west. These major. (page 87 of Ref. 1) Environmental Proposed Grid Connection Topics 132 kV HDWP circuit (124 MVA or 176 MVA) to Legacy from SSA B, plus Scenario 1 SSA C Windfarms to Llandinam SP Manweb Collector Llandinam Route to Welshpool SSA B Windfarms to Substation at Cefn 132kV HDWP circuit Summary of Effects Route Substation: Option A Coch from Substation at (Route Options CC1, CC2, CC3 and (Route Options BNC 3, BNC 4, BNC 5: Line Cefn Coch (SSA B) to CC4: Line Route Section 1) Route Sections 1 - 2b) Legacy both the 132kV alignment from views will be screened in Landscape Sensitivity - Route 2b crosses open Llanbadarn and the 33kV from Neuadd part by intervening In terms of settlements, some properties moorland plateau, largely comprising Goch. Otherwise the local road vegetation. on the edge of Fron Bank/Cilcewydd, unenclosed grass moor. It avoids the ridge to network is crossed 3 times. which lie within 500m of the overhead the north-west of the NG hub, keeping to the The distance of the sites line will experience a significant change flatter ground to the south of the high point Residential Visual Amenity - Residential from the A483, the local in their view, where there is no above Gors-dyfwch (418m). properties are limited in the upland landform, and intervening screening afforded by landform, landscape, although 5 properties are vegetation, reduces visibility buildings or vegetation. Of the many Visual Sensitivity - Steel towers will be visible likely to have views to the route, from the road. individual properties scattered in wider views of the moorland plateau. notably 2 properties at Blue Line Farm. throughout the study area, only those Recreational Resource - close to the overhead line will experience Residential Visual Amenity - The southward As the line drops off the high ground There is a relatively dense a significant change in their view some alignment of 2b takes it further from the properties increase, including those at network of public rights of of which will have views of the proposed properties at Carreg-y-big and Gwaenydd, and Cloesfynnon and Rhiw-felen, which will way in the vicinity of the overhead line. However, the nature of the towers would be a lesser presence in have views to the line. site; two local public the proposed overhead line, combined views. footpaths cross the site but with the screening effects of landform Visitor Attractions - No visitor these can be diverted to an and vegetation, mean that its effect will Visitor Attractions - There may be views of the attractions have been identified that existing track around the be limited, and no views would create towers at the head of the upland valley as seen would be directly or indirectly affected site. There would be views effects on residential amenity to the from the outdoor centre at Plas y drain, 1800m by route 1. to the site from the adjacent extent that they would become an to the north-east. public footpaths and others undesirable place to live. Recreational Resource - Route 1 in the vicinity; however use Recreational Resource - No recreational crosses Glwyndwr’s Way once and a of the footpaths does not Users of local public rights of way and resources have been identified that would be moderate density of RoWs also cross or appear to be high. open access areas will be variably affected by 2b. run adjacent to the line. affected. Where a pole is seen in close proximity to these areas (e.g. the public forest, footpaths and local access roads near Bryn-picca), the effect on visual amenity will be significant, although this effect will diminish rapidly with distance. Similarly, road users will be variably affected. Significant residual effects are noted for the A483 and B4355, although these effects would be localised and transient.

Lighting Not included in Reference 1. Not included in Reference 1. Llandinam Route to Welshpool Not included in Reference 1. No environmental This topic has not been included in (Chapter 11 of Ref. 2) information available. the environmental assessments or No significant environmental effects are reports for the routes included in anticipated on lighting. On this basis, this scenario. the decision was made to not make this topic the subject of a detailed environmental impact assessment. Noise and As no line route option is considered to As no line route option is Llandinam Route to Welshpool As no line route option is considered to have a No environmental It is not possible to draw Vibration have a greater or lesser effect in considered to have a greater (Chapter 11 of Ref. 2) greater or lesser effect in respect of this topic information available. conclusions from the environmental respect of this topic at this scale, this or lesser effect in respect of No significant environmental effects are at this scale, this topic has not been included information available, as all of the topic has not been included as it does this topic at this scale, this anticipated for noise. On this basis, the as it does not assist in identifying a line route routes have not considered this not assist in identifying a line route topic has not been included decision was made to not make this with least environmental effect. This topic will topic. with least environmental effect. This as it does not assist in topic the subject of a detailed be considered at the EIA stage. (page 48 of topic will be considered at the EIA identifying a line route with environmental impact assessment. This Ref. 1) stage. (page 48 of Ref. 1) least environmental effect. is because of the low intensity of This topic will be considered construction activities, the very low at the EIA stage. (page 48 volume of vehicle movements which of Ref. 1) construction of the proposed overhead line would generate, the short-term (days rather than weeks) and reversible activities at each wood pole structure, Environmental Proposed Grid Connection Topics 132 kV HDWP circuit (124 MVA or 176 MVA) to Legacy from SSA B, plus Scenario 1 SSA C Windfarms to Llandinam SP Manweb Collector Llandinam Route to Welshpool SSA B Windfarms to Substation at Cefn 132kV HDWP circuit Summary of Effects Route Substation: Option A Coch from Substation at (Route Options CC1, CC2, CC3 and (Route Options BNC 3, BNC 4, BNC 5: Line Cefn Coch (SSA B) to CC4: Line Route Section 1) Route Sections 1 - 2b) Legacy and the proven methods of noise control at construction sites.

No significant socio-economic effects would arise from the construction and decommissioning of the proposed overhead line.

Altitude and Topography - The eastern Altitude and Topography - The route would end of this route would cover altitudes start at a height of 340m, reducing to 260m at of up to 455m at the substation at the Afon Gam before increasing in height to Llanbadarn Fynydd. Moving west, the 380m. Gradients would be 0-150. land height is 373m at the Neuadd Environmental Proposed Grid Connection Topics 132 kV HDWP circuit (124 MVA or 176 MVA) to Legacy from SSA B, plus Scenario 1 SSA C Windfarms to Llandinam SP Manweb Collector Llandinam Route to Welshpool SSA B Windfarms to Substation at Cefn 132kV HDWP circuit Summary of Effects Route Substation: Option A Coch from Substation at (Route Options CC1, CC2, CC3 and (Route Options BNC 3, BNC 4, BNC 5: Line Cefn Coch (SSA B) to CC4: Line Route Section 1) Route Sections 1 - 2b) Legacy Goch substation. As the line moves BNC 3, 4 and 5 - line route section 2b south-west, land heights increase to (page 88 of Ref. 1) around 420m at Llaithddu and then Existing and Proposed OHL Infrastructure 33kV higher to around 550m at Hirddywel. and 132kV - This route would be crossed by Gradients range between 0-15°. As the the Nant y Moch OHL route. line passes west of Hirddywel, there is a section of land with a gradient of Existing and Proposed Wind Turbines - The between 15-22°. The height of land route passes within proximity of a number of then reduces to around 320m as the potential turbines, and it may not be possible route moves west before turning north. to maintain the required distance at the eastern end.

Altitude and Topography - The land height increases from 360m to 410m before reducing to 370m at the substation. Gradients are between 0-150. References (Ref.):

(1) SP MANWEB (Sept 2013). SP Mid Wales Connections, Line Routing Methodology & Appraisal - Phase 3 Report.

(2) SP MANWEB (Oct 2013). Volume 1: New 132kV Overhead Line Connection from Llandinam Wind Farm to Welshpool Substation - Updated Environmental Statement.

(3) National Grid (Sept 2013). Mid Wales Connection Project, Draft Substation Site Report.

(4) National Grid (Sept 2013). Mid Wales Connection Project, Draft Route Report.

Table G: Scenario 6 - 132 kV HDWP circuit to Legacy from SSA B, plus Llandinam connection to Welshpool, plus 132 kV HDWP between SSA B and SSA C

Environmental Proposed Grid Connection Topics 132 kV HDWP circuit to Legacy from SSA B, plus connection option 1, plus 132 kV HDWP between SSA B and SSA C SSA C Windfarms to SP Manweb Llandinam Route to SSA B Windfarms to Substation at 132kV Substation at Cefn Coch 132kV HDWP circuit Summary of Environmental Llandinam Route/Substation Collector Welshpool Cefn Coch (Located at Preferred National Grid from Substation at Effects at Cefn Coch Substation: (Route Options BNC 3, BNC 4, BNC 5: Substation Location NW at Cefn Cefn Coch (SSA B) (Route Options CC1, CC2, CC3 Option A Line Route Sections 1 - 2b) Coch) to Legacy and CC4: Line Route Sections 1- 2a-3-4b-5-6a-7a-8-9a-10) Air Quality As no line route option is As no line route Not covered in Reference 2. As no line route option is considered to Preferred Substation Location No environmental It is not possible to draw and Emissions considered to have a greater or option is have a greater or lesser effect in respect NW (Section 10.2 of Ref. 3) information available. conclusions from the (incl. dust) lesser effect in respect of this considered to of this topic at this scale, this topic has The site is more than 1km environmental information topic at this scale, this topic has have a greater or not been included as it does not assist in northwest of Tan-y-Foel Quarry and available, as all of the routes have not been included as it does not lesser effect in identifying a line route with least therefore unlikely to be not considered this topic. assist in identifying a line route respect of this environmental effect. This topic will be significantly affected by dust from with least environmental effect. topic at this scale, considered at the EIA stage. (page 48 of quarry. This topic will be considered at this topic has not Ref. 1) the EIA stage. (page 48 of Ref. been included as 1) it does not assist in identifying a line route with least environmental effect. This topic will be considered at the EIA stage. (page 48 of Ref. 1) Ecology/Biodi CC1, CC2, CC3 and CC4: Line SP Manweb Llandinam Route to BNC 3, 4 and 5 - line route section 1 Preferred Substation Location No environmental Birds: There are a number of versity and Route Sections 1-2a-3-4b-5- Collector Welshpool (Chapter 7 of (page 87 of Ref. 1) NW (Section 10.2 of Ref. 3) information available. ornithological 'hot-spots' in Geological 6a-7a-8-9a-10 (Appendix 6.1 Substation: Ref. 2) Wind farm Habitat Management Plan This site is primarily located within proximity to the proposed routes, Conservation of Ref. 1) Option A (Tables It is considered that the Area (HMP) - The route passes through an area of semi-improved grassland whereby there is potential for Wind farm Habitat Management 6.4 and 6.5 of proposed overhead line is not the Llanbrynmair Wind Farm HMP At its with low species diversity. Areas of larger species, (such as swans) to Plan Area (HMP) - Line route Ref. 1) likely to result in any very eastern extent, the route borders valuable habitat do occur to the collide with overhead lines which sections 1, and 6a-10 pass SAC - The River significant adverse long-term provisional areas set out for the Tirgwynt north east of the site and are presents a long-term permanent through and/or are within 2km Wye SAC effects. If the mitigation HMP. represented by wetland/peatland hazard to birds, however the use of HMP areas for Hirddywell headwaters lie measures discussed in habitats along a stream valley, of bird deflectors is likely to Wind Farm and the Tirgwynt 0.75km to the Chapter 7 (Ref. 2) are fully Peatland Habitats - The route passes therefore indirect hydrological reduce this risk. There is also a HMP area. south east of the implemented any risk of through potential peat habitat to the effects are a consideration in this concern that the movements and site with adverse effects will be further south and east of Llanbrynmair Wind area. noises associated with the Protected Species - The route associated reduced. Farm, along the northern boundary of construction of the NG substation passes through and passes freshwater the woodland. Consideration of ornithological may have a detrimental effect within 730m to 2km of many sensitivities. The potential for collisions effects is also required given upon birds that nest nearby. potential protected species with overhead lines is Ornithological ‘Hot Spots’ - There are no proximity to habitats of bird value hotspots. SSSI - The site probably the most significant ornithological hotspots associated with noted in Tirgwynt EIA (e.g. nesting Designated Sites: No designated lies less than 1km effect likely to arise. This the route; however the Foel Quarry curlew). There is a concern that the sites are likely to be directly Peatland Habitats - Line route from Gweunydd represents a long-term, hotspot is approximately 360m to the movements and noises associated affected by the proposed grid sections 1 passes through two Camnant SSSI, permanent hazard to certain south. with the construction of the connections, however there are a large areas of potential peat. It designated for groups of birds, primarily the substation may have a detrimental number of designated sites which also passes through areas habitats, the River larger species such as swans BNC 3, 4 and 5 - line route section effect upon the curlews and other lie in close proximity to the routes. identified in Environmental Ithon SSSI and and to a lesser extent the 2b (page 87 of Ref. 1) breeding bird that nest nearby. Statements as supporting peat the smaller wildfowl. However, Wind farm Habitat Management Plan However, the EIA for the consented Habitat Management Plans: Due to habitats. Esgairdraenllwyn the erection of bird deflectors Area (HMP) - Approx. 700m of the route Tirgwynt windfarm did not identify the location of the wind farm Pastures SSSI, in appropriate locations will passes through provisional areas set out this as a significant impact. substations the routes will pass Ornithological ‘Hot Spots’ - The designated for reduce the risk of birds for the Tirgwynt HMP. through a number of wind farm route passes through and within habitats. colliding with the overhead Due to the location of the substation HMP areas. 300m to 1.1km of many hot line, and the erection of Peatland Habitats - No potential peat site it is highly likely that the site, spots, including the Tylwch tip devices to discourage or areas were identified within the route. and the indicative incoming Protected Species: Protected hotspot (to the south of the prevent roosting on wood connections and potentially the species are likely to be located in route) and Bwlch y Garreg (to pole supports will reduce the Ornithological ‘Hot Spots’ - outgoing National Grid route proximity to the routes. However the north of the route). risk of predation on ground Approximately 450m of the route passes associated with the site, will affect full compliance with relevant nesting birds. through the Foel Quarry ornithological valuable ecological features such as protected species legislation is Sites Designated for Nature hotspot. peatland and/or ornithology. likely to help to minimise any Conservation Importance (SPA, effects. Environmental Proposed Grid Connection Topics 132 kV HDWP circuit to Legacy from SSA B, plus connection option 1, plus 132 kV HDWP between SSA B and SSA C SSA C Windfarms to SP Manweb Llandinam Route to SSA B Windfarms to Substation at 132kV Substation at Cefn Coch 132kV HDWP circuit Summary of Environmental Llandinam Route/Substation Collector Welshpool Cefn Coch (Located at Preferred National Grid from Substation at Effects at Cefn Coch Substation: (Route Options BNC 3, BNC 4, BNC 5: Substation Location NW at Cefn Cefn Coch (SSA B) (Route Options CC1, CC2, CC3 Option A Line Route Sections 1 - 2b) Coch) to Legacy and CC4: Line Route Sections 1- 2a-3-4b-5-6a-7a-8-9a-10) SAC, SSSI) - The route does not pass through any statutory Peatland Habitats: A number of designated sites; however the routes pass through areas of several designated areas are potential peatland habitat. within a 2km radius, including the River Wye SAC and the Llan Mawr SSSI. The closest site is the Gweunydd Camnant SSSI, approx. 55m to the north of line route section 1. Climate As no line route option is As no line route Not covered in Reference 2. As no line route option is considered to Not included in Reference 3. No environmental This topic has not been included in Change considered to have a greater or option is have a greater or lesser effect in respect information available. the environmental assessments or lesser effect in respect of this considered to of this topic at this scale, this topic has reports for the routes included in topic at this scale, this topic has have a greater or not been included as it does not assist in this scenario. not been included as it does not lesser effect in identifying a line route with least assist in identifying a line route respect of this environmental effect. This topic will be with least environmental effect. topic at this scale, considered at the EIA stage. (page 48 of This topic will be considered at this topic has not Ref. 1) the EIA stage. (page 48 of Ref. been included as 1) it does not assist in identifying a line route with least environmental effect. This topic will be considered at the EIA stage. (page 48 of Ref. 1) Electric and As no line route option is As no line route Llandinam Route to As no line route option is considered to Not included in Reference 3. No environmental This topic has not been included in Magnetic considered to have a greater or option is Welshpool (Chapter 11 of have a greater or lesser effect in respect information available. the environmental assessments or Fields lesser effect in respect of this considered to Ref. 2) of this topic at this scale, this topic has reports for the routes included in topic at this scale, this topic has have a greater or No significant environmental not been included as it does not assist in this scenario. not been included as it does not lesser effect in effects are anticipated on identifying a line route with least assist in identifying a line route respect of this electric and magnetic fields. environmental effect. This topic will be with least environmental effect. topic at this scale, On this basis, the decision considered at the EIA stage. (page 48 of This topic will be considered at this topic has not was made to not make this Ref. 1) the EIA stage. (page 48 of Ref. been included as topic the subject of a detailed 1) it does not assist environmental impact in identifying a assessment. line route with least environmental effect. This topic will be considered at the EIA stage. (page 48 of Ref. 1) Environmental Proposed Grid Connection Topics 132 kV HDWP circuit to Legacy from SSA B, plus connection option 1, plus 132 kV HDWP between SSA B and SSA C SSA C Windfarms to SP Manweb Llandinam Route to SSA B Windfarms to Substation at 132kV Substation at Cefn Coch 132kV HDWP circuit Summary of Environmental Llandinam Route/Substation Collector Welshpool Cefn Coch (Located at Preferred National Grid from Substation at Effects at Cefn Coch Substation: (Route Options BNC 3, BNC 4, BNC 5: Substation Location NW at Cefn Cefn Coch (SSA B) (Route Options CC1, CC2, CC3 Option A Line Route Sections 1 - 2b) Coch) to Legacy and CC4: Line Route Sections 1- 2a-3-4b-5-6a-7a-8-9a-10) Forestry and CC1, CC2, CC3 and CC4: Line SP Manweb Llandinam Route to BNC 3, 4 and 5 - line route section 1 Not included in Reference 3. No environmental Some trees and hedgerows will be Woodland Route Sections 1-2a-3-4b-5- Collector Welshpool (Chapter 7 of (page 87 of Ref. 1) information available. lost to facilitate construction of the 6a-7a-8-9a-10 (Appendix 6.1 Substation: Ref. 2) Other Forestry and Woodland - Route 1 grid connection routes. The loss of Ref. 1) Option A (Tables It is considered that the will pass through c.320m of mature of trees may result in potential Ancient and Semi-Natural 6.4 and 6.5 of proposed overhead line is not coniferous plantation above Nant y Graig habitat loss for bats, although this woodland (ASNW) - Line route Ref. 1) likely to result in any Lwyd, and c.730m of mature coniferous is expected to be a localised sections 1, 4b, and 6a will affect Other Forestry significant adverse long-term plantation at Cors yr Ebolion. Native effect. areas of ASNW, this will be and Woodland - effects. If the mitigation trees along the Nant y Graig Lwyd may avoided, where possible, at There are a measures discussed in be affected by the lines. In some locations, mature trees as detailed design stage. Line number of small Chapter 7 (Ref. 2) are fully well as Ancient and Semi-Natural route sections 2a, 3, 4b, 7a and blocks of forestry implemented any risk of BNC 3, 4 and 5 - line route section woodland may be affected by 8 affect areas of ASNW and and shelter belt adverse effects will be further 2b (page 87 of Ref. 1) construction of the proposed limited felling may be required. planting located reduced. Other Forestry and Woodland - 2b may routes. Although this will be within the vicinity affect small stands of woodland south- avoided where possible at the of the substation Some trees will be lost to west of the NG hub. detailed design stage, limited Other Forestry and Woodland - site which will facilitate construction of the felling may be required in some All line route sections cross screen and Amended Development, locations. some fields where limited felling backdrop the including trees that may have of hedgerow trees, and in some proposed potential for bats. This tree cases (e.g. line route sections 1 substation. The loss may result in potential and 3) woodland edge trees. site will not habitat loss for bats. Line route section 9a passes require any felling through 5.9ha of woodland on of existing the Welsh National Forest plantation Inventory although no mature woodland. trees would be felled. Geology and Not included in Reference 3. Not included in Llandinam Route to Not included in Reference 1. Not included in Reference 3. No environmental This topic has not been included in Soils Reference 3. Welshpool (Chapter 11 of information available. the environmental assessments or Ref. 2) reports for the routes included in No significant environmental this scenario. effects are anticipated on geology or soil resources. On this basis, the decision was made to not make this topic the subject of a detailed environmental impact assessment. Environmental Proposed Grid Connection Topics 132 kV HDWP circuit to Legacy from SSA B, plus connection option 1, plus 132 kV HDWP between SSA B and SSA C SSA C Windfarms to SP Manweb Llandinam Route to SSA B Windfarms to Substation at 132kV Substation at Cefn Coch 132kV HDWP circuit Summary of Environmental Llandinam Route/Substation Collector Welshpool Cefn Coch (Located at Preferred National Grid from Substation at Effects at Cefn Coch Substation: (Route Options BNC 3, BNC 4, BNC 5: Substation Location NW at Cefn Cefn Coch (SSA B) (Route Options CC1, CC2, CC3 Option A Line Route Sections 1 - 2b) Coch) to Legacy and CC4: Line Route Sections 1- 2a-3-4b-5-6a-7a-8-9a-10) Historic CC1, CC2, CC3 and CC4: Line SP Manweb Llandinam Route to BNC 3, 4 and 5 - line route section 1 Preferred Substation Location No environmental Two designated features (SAMs) Environment Route Sections 1-2a-3-4b-5- Collector Welshpool (Chapter 8 of (page 87 of Ref. 1) NW (Section 10.2 of Ref. 3) information available. are located within the Llandinam 6a-7a-8-9a-10 (Appendix 6.1 Substation: Ref. 2) SAMs - There is 1 SAM within the route The site is located in an area where route and one within the SP MWC of Ref. 1) Option A (Tables The proposed overhead line but none within 2km. there are no key local receptors, but BNC route. The Llandinam Route SAMs - The northen area of the 6.4 and 6.5 of from the Llandinam it is located roughly equidistant and other routes included in this route contains more SAMs that Ref. 1) Repowering Wind Farm to the The proximity of the scheduled Bon-y- between a scheduled Kerb Cairn scenario pass within 1-2km of are within 2km of the route. Undesignated Welshpool Grid Substation, maen root store and on the farm of (WSM MG 327), a scheduled stone other historic assets, including: For example, no SAMs are Archaeology - An some 35 km long, adopts a which it forms a part will form a key circle (WSM MG 179), and a root SAMs, Conservation Areas, Listed located within line route section undesignated site course to the south and east consideration for the detailed line design store (WSM MG 218). These sites Buildings (primarily lower grade II 1 but 24 SAMs lie in 14 groups of historical of the Severn Valley which stage and effects on its setting will form are situated approximately 2km but also including higher grade), within 2km of the route and line interest (a single takes it past and through a key consideration during the EIA away from the substation, and historic landscapes, Registered route sections 2a-5 have no storey derelict some of the richest cultural stage. outside of any identified areas of Historic Parks and Gardens and SAMs within 2km of the route. stone building) heritage landscapes in mid theoretical visibility. However, undesignated below-ground Whereas line route sections 6a- lies immediately Wales. Listed Buildings (LBs) - There are no whilst the substation site will not be sites/features. Mitigation 10 all have SAMs located within adjacent to the LBs within the route section. There are 2 visible from any of these measures will be deployed to 2km of the route. site to the There are 55 SAMs located LBs within 2km of it, both of lower grade monuments, the proposed overhead minimise direct effects on northeast. within 2km of the overhead II. line is potentially visible from the features, however significant Virtually all the SAMs are line, two of them (Crugyn root store and may have a slightly effects on the setting of a number prehistoric burial and ritual Bank Dyke and Bryn Undesignated Archaeology - There are 2 adverse effect upon its landscape of features are predicted. monuments, some with wide- Cwmyrhiwdre Round Barrow) undesignated archaeological features in context. ranging views, others are rare within the 100m wide the route section. Direct effects will be Only the Llandinam route passes prehistoric house sites. corridor. There are also 452 avoided, where possible, during detailed An undesignated group of pillow through a Registered Historic Listed Buildings, five design. mounds (WNMR 9448) of regional Landscape resulting in significant Listed Buildings (LBs) - All line Registered Historic Parks and importance is located to the south effects. route sections, apart from 9a Gardens, seven Conservation BNC 3, 4 and 5 - line route section east. Whilst the substation site will and 10 are within 2km of LBs, Areas, and one of Wales’ 2b (page 87 of Ref. 1) not be visible, the proposed the majority of which are lower Registered Historic SAMs - There are no SAMs within the overhead lines into and out of the grade II. However, some line Landscapes would be crossed route but two within 2km, the Bon-y- substation, are potentially visible route sections (e.g. 5) have LBs by the proposed overhead maen root store and Y Capel stone circle. and may have a slightly adverse of higher grade II* designated line. effects upon their landscape status. LBs that are within close Listed Buildings (LBs) - There are no context. proximity (i.e. 150m) of the It is the heritage assets within Listed Buildings within 2km of the route route such as Ystradfaelog the 100 m wide corridor that section. which is the higher grade II* are most at risk from the building along line route section proposed overhead line and Undesignated Archaeology - There are 5, could be the possibility of could be adversely affected no undesignated archaeological features visual impact. by its construction. Most of in the route section. these are considered to be of Conservation Areas - Only line low (local) or even negligible route section 3 is located within value, but there are some of 2km of a Conservation Area, medium (regional) which is Llanidloes Conservation significance, as well as the Area. few of high (national) importance. Appropriate Registered Historic Landscapes mitigation (e.g. preservation (RHLs) - Line route sections 2a, in situ, preservation by 3, 5 and 6a are within 1-2km of record, excavation, Clywedog Valley RHL and/or evaluation, watching brief) Caersws Basin RHL. including the careful demarcation of assets is Undesignated Archaeology - suggested which should Undesignated archaeological ensure that damage is kept to features are located along most a minimum during the line route sections. Direct erection of the supports. effects will be avoided, where possible, during detailed design. Assuming that a full suite of mitigation measures is Environmental Proposed Grid Connection Topics 132 kV HDWP circuit to Legacy from SSA B, plus connection option 1, plus 132 kV HDWP between SSA B and SSA C SSA C Windfarms to SP Manweb Llandinam Route to SSA B Windfarms to Substation at 132kV Substation at Cefn Coch 132kV HDWP circuit Summary of Environmental Llandinam Route/Substation Collector Welshpool Cefn Coch (Located at Preferred National Grid from Substation at Effects at Cefn Coch Substation: (Route Options BNC 3, BNC 4, BNC 5: Substation Location NW at Cefn Cefn Coch (SSA B) (Route Options CC1, CC2, CC3 Option A Line Route Sections 1 - 2b) Coch) to Legacy and CC4: Line Route Sections 1- 2a-3-4b-5-6a-7a-8-9a-10) successfully implemented, the proposed overhead line should not have any significant long-term effect on the cultural heritage. In particular, there are no likely significant direct effects on cultural heritage arising during the construction, operation or decommissioning of the proposed overhead line.

Inevitably during the operational life of the proposed overhead line, it would have an indirect visual effect on a significant number of designated and registered assets. In a few cases, around six in number, that effect is likely to be very large. It is difficult to identify how such visual effects might be reduced for the density of assets in this region is such that any route adopted would be likely to generate visual issues. These are long-term temporary effects which would last for the operational life of the proposed overhead line but which would be completed removed once the proposed overhead line has been decommissioned. Environmental Proposed Grid Connection Topics 132 kV HDWP circuit to Legacy from SSA B, plus connection option 1, plus 132 kV HDWP between SSA B and SSA C SSA C Windfarms to SP Manweb Llandinam Route to SSA B Windfarms to Substation at 132kV Substation at Cefn Coch 132kV HDWP circuit Summary of Environmental Llandinam Route/Substation Collector Welshpool Cefn Coch (Located at Preferred National Grid from Substation at Effects at Cefn Coch Substation: (Route Options BNC 3, BNC 4, BNC 5: Substation Location NW at Cefn Cefn Coch (SSA B) (Route Options CC1, CC2, CC3 Option A Line Route Sections 1 - 2b) Coch) to Legacy and CC4: Line Route Sections 1- 2a-3-4b-5-6a-7a-8-9a-10) Land Use CC1, CC2, CC3 and CC4: Line No environmental Not covered in Reference 2. BNC 3, 4 and 5 - line route section 1 Not included in Reference 4. No environmental It is not possible to draw Route Sections 1-2a-3-4b-5- information was (pages 87 and 88 of Ref. 1) information available. conclusions from the 6a-7a-8-9a-10 (Appendix 6.1 covered for this Open space and Green Infrastructure - environmental information of Ref. 1) topic. Route 1 routes across approximately available, as all of the routes have Open space and Green 1,766m of open access land. not considered this topic. Infrastructure - Line route section 1 crosses one area of BNC 3, 4 and 5 - line route section Open Country access and lies 2b (pages 87 and 88 of Ref. 1) within 1km of one other, and Open space and Green Infrastructure - within 1km of two areas of 2b routes across approximately 694m of Registered Common Land. open access land. Landscape CC1, CC2, CC3 and CC4: Line SP Manweb Llandinam Route to BNC 3, 4 and 5 - line route section 1 Preferred Substation Location No environmental Landscape and visual effects are and Route Sections 1-2a-3-4b-5- Collector Welshpool (Chapter 6 of (page 87 of Ref. 1) NW (Section 10.2 of Ref. 3) information available. likely to arise along the routes of Visual 6a-7a-8-9a-10 (Appendix 6.1 Substation: Ref. 2) Landscape Sensitivity - Route 1 Whilst currently a substation in this this scenario, however the effects Amenity of Ref. 1) Option A (Tables Any likely significant descends into the small-medium scale remote rural location would will be localised and will diminish Landscape and visual amenity 6.4 and 6.5 of landscape or visual effects valley of the Nant y Graig Lwyd. It represent a detracting urban rapidly with distance from the varies along the route. Along Ref. 1) would arise during the traverses a shoulder of moorland, element, which would be route. certain line route sections short Landscape operational stage from the remaining behind the ridge line where inconsistent with the local landscape sections of sky lining will occur Sensitivity - The localised loss of trees and the possible. Between Cwmderwen and Cors character, this situation is likely to Localised significant effects have (e.g. line route section 2a), and open pasture introduction into the yr Ebolion it crosses medium to large- change with the construction of the been identified for visual receptors the line route sections will be landscape lies landscape of approximately scale upland pasture. It then passes Tirgwynt wind farm and Mynydd utilising a proportion of the visible as they drop down into below the higher 35 km of new overhead line across larger-scale moorland plateau, Waen Fawr wind farm (if footpaths, roads and residential valleys, such as Afon Trannon moorland tops to on wood pole structures. The avoiding the highest ground where constructed) as the proposed properties sited close to the routes Valley. However, some line the north and east design and routeing of the possible. substation would potentially be seen of this scenario. route sections are provided with above the A483. proposed overhead line has alongside above ground equipment natural screening in areas by The Ithon valley been developed to minimise Visual Sensitivity - The parallel wood such as overhead electricity lines, Overall, for the SSAC connection existing hedgerow and riparian runs to the east of its effects on the landscape pole lines may be seen on the skyline pylons and the turbines of the to Welshpool, effects are more trees, and line route sections, the site but is and visual amenity of the above Nant y Graig Lwyd from locations Tirgwynt Wind farm and other likely for landscape and visual such as line route section 1, relatively shallow area. within Nant-yr-Eira. The lines will be planned wind farms. The Overall receptors located close to the follow the field pattern, using at this point. The backclothed by forestry on the south Visual and Sensory Evaluation southern sections of the proposed field boundaries and shelter moderate sized The location of the Llandinam side of Nant-yr-Eira. Beyond Cors yr (VS50) of the site is High. route. This is because this is belts to screen and backdrop pastoral fields are wind farm on the Waun Ebolion the plateau has few inward views generally a more elevated area the route. often contained by Ddubarthog Ridge means that and wood poles are unlikely to be seen. The ZTV suggests that a substation with lower levels of vegetation coniferous shelter the route is more visible at in this location may just be visible cover consequently there would be Line route sections, such as 6a, belts and larger the southern end of the From the head of Nant Wythan, 1 will be from Snowdonia National Park in the greater potential visibility for the pass through relatively open woodland blocks, corridor, than further north carried on steel towers. These may be high area of Mynydd Clywedog. This routes. In comparison, the central landscapes above the valley which both where it merges into the visible in longer views toward the would be at a distance of 15km and and northern sections of the floor and will be visible in views introduce man more diverse and enclosed moorland, e.g. from Cwm Llwyd to the it is likely that the substation would Llandinam – Welshpool route is across valleys, although these made elements to landscape east of the Severn south and from the Banwy valley to the be imperceptible from this distance. routed through more diverse and views will be back dropped by the landscape and Valley. However, the use of north. The towers will be partially enclosed landscape character wooded slopes. Line route break up and wood pole supports helps screened/backclothed by forestry at The ZTV indicates that the site is types, although the corollary is section 6a will also be locally contain views. mitigate the effects within the Mynydd Carreg-y-big in some views. visually well contained due to the that these sections tend to be prominent as it runs around the The substation is more open and elevated parts surrounding landform which more populous, therefore a Allt y Genlli hillside above potentially visible of the route. Residential Visual Amenity - The parallel provides natural screening on three greater number of receptors are Tanyrallt. Also,in certain within the wood pole lines may be viewed from two sides. Areas of potential visibility likely. lcoations, line route sections landscape due to Landscape Effects properties at Cwmderwen, descending are largely restricted to the sparsely The SSAC connection to Cefn Coch pass through areas of ancient its elevation and Although significant or from high ground into Nant-yr-Eira. populated valley and surrounding will be visible as it crosses roads and semi-natural woodland and the relatively open borderline significant, all the These properties would also overlook the hill slopes to the north-east, and within valleys and there are scattered properties. nature of the effects were assessed as crossing of the Afon Gam at relatively including the lower slopes of likely to be potential visual effects upland landscape. minor-moderate or moderate close range. There may be views of the Mynydd Waun Fawr, the Mynydd y on a number of residential Potential visual effects are However, the and none of the effects was route from Dolau-ceimion, although the Gribin ridgeline and Foel Fawr. properties. possible for residential sensitivity of this assessed as major. The only lines will be backclothed. properties, such as Oakley Park, landscape is landscape along the route It is anticipated that there would be Landscape and visual effects are which will have views of line medium-low, and identified as experiencing a Visitor Attractions - No visitor attractions unrestricted and filtered views of likely along line route section 1 of route section 4b. Line route there is scope for moderate and therefore have been identified that would be the development from Gwaenydd BNC 3, BNC 4 and BNC5. section 4b will also have further extension of the significant effect is between affected by BNC1. and potentially from a few other However, these elements of this effects on individual properties existing areas of the A483 near Old Neuadd scattered properties further afield. scenario will be screened from Environmental Proposed Grid Connection Topics 132 kV HDWP circuit to Legacy from SSA B, plus connection option 1, plus 132 kV HDWP between SSA B and SSA C SSA C Windfarms to SP Manweb Llandinam Route to SSA B Windfarms to Substation at 132kV Substation at Cefn Coch 132kV HDWP circuit Summary of Environmental Llandinam Route/Substation Collector Welshpool Cefn Coch (Located at Preferred National Grid from Substation at Effects at Cefn Coch Substation: (Route Options BNC 3, BNC 4, BNC 5: Substation Location NW at Cefn Cefn Coch (SSA B) (Route Options CC1, CC2, CC3 Option A Line Route Sections 1 - 2b) Coch) to Legacy and CC4: Line Route Sections 1- 2a-3-4b-5-6a-7a-8-9a-10) along the route, notably at Red coniferous Bank and Cae-betin Wood, Recreational Resource - The parallel There would also be views from the some receptors and directions and House and Ty’n-y-celyn. planting belts including the open hillside wood pole lines would be visible within public right of way network, but no the overhead line may potentially which contain below the Kerry Ridgeway Nant y Graig Lwyd and Nant yr Eira from views from the local lanes. In those be seen alongside other above Line route sections, such as line views. The site Regional Trail. Other areas of the Glyndwr Way, which passes between locations where the proposed ground equipment such the route section 1, will be visible as includes a belt of landscape (e.g. the Canlad 300-500m to the north. substation is likely to be visible, it turbines of the planned wind they cross roads (e.g. A483). existing coniferous Valley and the Severn Valley) would potentially be seen alongside farms. planting on its would experience minor- BNC 3, 4 and 5 - line route section above ground equipment such as Effects on visitor attractions are southern edge moderate effects which would 2b (page 87 of Ref. 1) overhead electricity lines, pylons Effects are likely for landscape and unlikely to arise from the route which will both be borderline significant. Landscape Sensitivity - Route 2b crosses and the turbines of some of the visual receptors around the beyond localised effects on screen, and open moorland plateau, largely planned wind farms. substation at Cefn Coch than the public footpaths. provide a Visual Effects comprising unenclosed grass moor. It SP Manweb Collector Substation: backdrop for the Although significant or avoids the ridge to the north-west of the The visual effects arising from a Option A. It is anticipated that substation verging on significant, all the NG hub, keeping to the flatter ground to substation in this location could be there would be unrestricted and infrastructure. effects were assessed as the south of the high point above Gors- lessened by perimeter mounding filtered views of the substation at minor - moderate or dyfwch (418m). supplemented by planting which Cefn Coch from the surrounding Residential Visual moderate and none of these could include a high proportion of area, and it would potentially be Amenity - The effects was assessed as Visual Sensitivity - Steel towers will be conifers. The proximity of the site to seen alongside above ground area is sparsely major. visible in wider views of the moorland existing mature coniferous equipment such as overhead populated with plateau. plantations and shelter belts electricity lines and the turbines of only fours In terms of settlements, some provides a structural planting the planned wind farms. properties within properties on the edge of Residential Visual Amenity - The context. However the screening 1km of the Fron Bank/Cilcewydd, which southward alignment of 2b takes it benefits would only be achieved in substation. Views lie within 500m of the further from the properties at Carreg-y- the long term as the planting from residential overhead line will experience big and Gwaenydd, and the towers reached full maturity. Also the properties will be a significant change in their would be a lesser presence in views. entries and exit for the overhead limited to the view, where there is no lines would have to kept free from properties at screening afforded by Visitor Attractions - There may be views tall vegetation and views of the Camnant Farm, landform, buildings or of the towers at the head of the upland infrastructure would potentially be Camnant Bridge vegetation. Of the many valley as seen from the outdoor centre available at these points. and one property individual properties scattered at Plas y drain, 1800m to the north-east. to the north-west. throughout the study area, These views will only those close to the Recreational Resource - No recreational be screened in overhead line will experience resources have been identified that part by a significant change in their would be affected by 2b. intervening view some of which will have vegetation. views of the proposed overhead line. However, the The distance of nature of the proposed the sites from the overhead line, combined with A483, the local the screening effects of landform, and landform and vegetation, intervening mean that its effect will be vegetation, limited, and no views would reduces visibility create effects on residential from the road. amenity to the extent that they would become an Recreational undesirable place to live. Resource - There is a relatively Users of local public rights of dense network of way and open access areas public rights of will be variably affected. way in the vicinity Where a pole is seen in close of the site; two proximity to these areas (e.g. local public the public forest, footpaths footpaths cross and local access roads near the site but these Bryn-picca), the effect on can be diverted to visual amenity will be Environmental Proposed Grid Connection Topics 132 kV HDWP circuit to Legacy from SSA B, plus connection option 1, plus 132 kV HDWP between SSA B and SSA C SSA C Windfarms to SP Manweb Llandinam Route to SSA B Windfarms to Substation at 132kV Substation at Cefn Coch 132kV HDWP circuit Summary of Environmental Llandinam Route/Substation Collector Welshpool Cefn Coch (Located at Preferred National Grid from Substation at Effects at Cefn Coch Substation: (Route Options BNC 3, BNC 4, BNC 5: Substation Location NW at Cefn Cefn Coch (SSA B) (Route Options CC1, CC2, CC3 Option A Line Route Sections 1 - 2b) Coch) to Legacy and CC4: Line Route Sections 1- 2a-3-4b-5-6a-7a-8-9a-10) an existing track significant, although this around the site. effect will diminish rapidly There would be with distance. Similarly, road views to the site users will be variably from the adjacent affected. Significant residual public footpaths effects are noted for the A483 and others in the and B4355, although these vicinity; however effects would be localised and use of the transient. footpaths does not appear to be high.

Lighting Not included in Reference 1. Not included in Llandinam Route to Not included in Reference 1. Not included in Reference 4. No environmental This topic has not been included in Reference 1. Welshpool (Chapter 11 of information available. the environmental assessments or Ref. 2) reports for the routes included in No significant environmental this scenario. effects are anticipated on lighting. On this basis, the decision was made to not make this topic the subject of a detailed environmental impact assessment. Noise and As no line route option is As no line route Llandinam Route to As no line route option is considered to Preferred Substation Location No environmental It is not possible to draw Vibration considered to have a greater or option is Welshpool (Chapter 11 of have a greater or lesser effect in respect NW (Section 10.2 of Ref. 3) information available. conclusions from the lesser effect in respect of this considered to Ref. 2) of this topic at this scale, this topic has The nearest dwelling to the site is environmental information topic at this scale, this topic has have a greater or No significant environmental not been included as it does not assist in approx 950m to the northeast. available, as all of the routes have not been included as it does not lesser effect in effects are anticipated for identifying a line route with least Rating levels below existing not considered this topic. assist in identifying a line route respect of this noise. On this basis, the environmental effect. This topic will be background levels are achievable with least environmental effect. topic at this scale, decision was made to not considered at the EIA stage. (page 48 of with standard noise mitigation This topic will be considered at this topic has not make this topic the subject of Ref. 1) solutions. the EIA stage. (page 48 of Ref. been included as a detailed environmental 1) it does not assist impact assessment. This is in identifying a because of the low intensity line route with of construction activities, the least very low volume of vehicle environmental movements which effect. This topic construction of the proposed will be considered overhead line would generate, at the EIA stage. the short-term (days rather (page 48 of Ref. than weeks) and reversible 1) activities at each wood pole structure, and the proven methods of noise control at construction sites.

As a series of small streams drain the site area, there is a potentially low risk for minor effect to both the surface water flows and quality, Environmental Proposed Grid Connection Topics 132 kV HDWP circuit to Legacy from SSA B, plus connection option 1, plus 132 kV HDWP between SSA B and SSA C SSA C Windfarms to SP Manweb Llandinam Route to SSA B Windfarms to Substation at 132kV Substation at Cefn Coch 132kV HDWP circuit Summary of Environmental Llandinam Route/Substation Collector Welshpool Cefn Coch (Located at Preferred National Grid from Substation at Effects at Cefn Coch Substation: (Route Options BNC 3, BNC 4, BNC 5: Substation Location NW at Cefn Cefn Coch (SSA B) (Route Options CC1, CC2, CC3 Option A Line Route Sections 1 - 2b) Coch) to Legacy and CC4: Line Route Sections 1- 2a-3-4b-5-6a-7a-8-9a-10) with the proposed substation potentially affecting both ground water recharge and surface run-off characteristics within the site area. Technical CC1, CC2, CC3 and CC4: Line SP Manweb Not covered in Reference 2. BNC 3, 4 and 5 - line route section 1 Preferred Substation Location No environmental Review Route Sections 1-2a-3-4b-5- Collector (page 88 of Ref. 1) NW (Section 10.2 of Ref. 3) information available. This information is not applicable 6a-7a-8-9a-10 (Appendix 6.1 Substation: Existing and Proposed OHL The site sits within a shallow valley to the summary of effects as it has of Ref. 1) Option A (Tables Infrastructure 33kV and 132kV - This with ground levels rising steeply been included for reference only. Existing and Proposed OHL 6.4 and 6.5 of route would be crossed by the Nant y towards the southern part of the Infrastructure 33kV and 132kV - Ref. 1) Moch Wind Farm OHL route. site. To create a development This route would cross existing This site could plateau, some earthworks will be 33kV OHL at certain line route accommodate the Existing and Proposed Wind Turbines - required. Earthworks should be sections, however, this could be required The route passes within proximity of a easier in Glacial soils than, although undergrounded. equipment. number of turbines, however the the thickness of these is unknown. required distance from turbines can be If required, cutting operations Existing and Proposed Wind maintained during the detailed design through sandstone bedrock will Turbines - Line route section 1 stage. likely necessitate the use of passes within proximity of hydraulic breakers or blasting. turbines; however it will be Altitude and Topography - The route possible to maintain the would start at a height of 340m, A watercourse runs through the required distance. Line route reducing to 260m at the Afon Gam centre of the site from West to East sections 9a and 10 also pass before increasing in height to 380m. and will need diverting using surface within proximity of turbines but Gradients would be 0-150. ditches. it may not be possible to maintain the required distance BNC 3, 4 and 5 - line route section for line route section 9a. 2b (page 88 of Ref. 1) Existing and Proposed OHL Altitude and Topography - The Infrastructure 33kV and 132kV - This altitude and topography varies route would be crossed by the Nant y throughout the route, as Moch OHL route. demonstrated from the examples detailed below: Existing and Proposed Wind Turbines - The route passes within proximity of a Line route section 1: The number of potential turbines, and it may eastern end of this route would not be possible to maintain the required cover altitudes of up to 455m at distance at the eastern end. the substation at Llanbadarn Fynydd. Moving west, the land Altitude and Topography - The land height is 373m at the Neuadd height increases from 360m to 410m Goch substation. As the line before reducing to 370m at the moves south-west, land heights substation. Gradients are between 0- increase to around 420m at 150. Llaithddu and then higher to around 550m at Hirddywel. Gradients range between 0-15°. As the line passes west of Hirddywel, there is a section of land with a gradient of between 15-22°. The height of land then reduces to around 320m as the route moves west before turning north.

Line route section 5 : Route 5 runs north-south over land heights between 170 – 300m. The northern section crosses Environmental Proposed Grid Connection Topics 132 kV HDWP circuit to Legacy from SSA B, plus connection option 1, plus 132 kV HDWP between SSA B and SSA C SSA C Windfarms to SP Manweb Llandinam Route to SSA B Windfarms to Substation at 132kV Substation at Cefn Coch 132kV HDWP circuit Summary of Environmental Llandinam Route/Substation Collector Welshpool Cefn Coch (Located at Preferred National Grid from Substation at Effects at Cefn Coch Substation: (Route Options BNC 3, BNC 4, BNC 5: Substation Location NW at Cefn Cefn Coch (SSA B) (Route Options CC1, CC2, CC3 Option A Line Route Sections 1 - 2b) Coch) to Legacy and CC4: Line Route Sections 1- 2a-3-4b-5-6a-7a-8-9a-10) gradients of between 15 -220.

Line route section 9a : The southern section of 9a crosses a section of land with a gradient of 15 to 220. As it moves north, land heights range from 420m to 370m before increasing again to 440m. References (Ref.):

(1) SP MANWEB (Sept 2013). SP Mid Wales Connections, Line Routing Methodology & Appraisal - Phase 3 Report.

(2) SP MANWEB (Oct 2013). Volume 1: New 132kV Overhead Line Connection from Llandinam Wind Farm to Welshpool Substation - Updated Environmental Statement.

(3) National Grid (Sept 2013). Mid Wales Connection Project, Draft Substation Site Report.

(4) National Grid (Sept 2013). Mid Wales Connection Project, Draft Route Report.

Table H: Scenario 7 - 2 x 132 kV HDWP circuits to Legacy from SSA B, plus Llandinam connection to Welshpool

Environmental Proposed Grid Connection Topics 2 x 132 kV HDWP circuits to Legacy from SSA B, plus Llandinam connection to Welshpool SSA C Windfarms to Llandinam SP Manweb Collector Llandinam Route to Welshpool SSA B Windfarms to Substation at 2 x 132kV HDWP Summary of Effects Route Substation: Option A Cefn Coch circuits from (Route Options CC1, CC2, CC3 and (Route Options BNC 3, BNC 4, BNC 5: Line Substation at Cefn CC4: Line Route Section 1) Route Sections 1 - 2b) Coch (SSA B) to Legacy Air Quality As no line route option is considered As no line route option is Not covered in Reference 2. As no line route option is considered to No environmental It is not possible to draw and Emissions to have a greater or lesser effect in considered to have a greater have a greater or lesser effect in respect information available. conclusions from the (incl. dust) respect of this topic at this scale, or lesser effect in respect of of this topic at this scale, this topic has environmental information this topic has not been included as this topic at this scale, this not been included as it does not assist in available, as all of the routes it does not assist in identifying a topic has not been included as identifying a line route with least have not considered this topic. line route with least environmental it does not assist in environmental effect. This topic will be effect. This topic will be considered identifying a line route with considered at the EIA stage. (page 48 of at the EIA stage. (page 48 of Ref. 1) least environmental effect. Ref. 1) This topic will be considered at the EIA stage. (page 48 of Ref. 1) Ecology/Biodi CC4, CC1 and CC3: Line route SP Manweb Collector Llandinam Route to Welshpool (Chapter 7 of BNC 3, 4 and 5 - line route section 1 No environmental Birds: There are a number of versity and section 1 (page 91 of Ref. 1) Substation: Option A Ref. 2) (page 87 of Ref. 1) information available. ornithological 'hot-spots' in Geological Wind farm Habitat Management (Tables 6.4 and 6.5 of Ref. It is considered that the proposed overhead line is Wind farm Habitat Management Plan Area proximity to the proposed Conservation Plan Area (HMP) - The route passes 1) not likely to result in any significant adverse long- (HMP) - The route passes through the routes, whereby there is through several HMP areas SAC - The River Wye SAC term effects. If the mitigation measures Llanbrynmair Wind Farm HMP At its very potential for larger species, (such associated with Hirddywell Wind headwaters lie 0.75km to the discussed in Chapter 7 (Ref. 2) are fully eastern extent, the route borders as swans) to collide with Farm. south east of the site with implemented any risk of adverse effects will be provisional areas set out for the Tirgwynt overhead lines which presents a associated freshwater further reduced. HMP. long-term permanent hazard to Protected Species - The route sensitivities. birds, however the use of bird passes through a small potential The potential for collisions with overhead lines is Peatland Habitats - The route passes deflectors is likely to reduce this protected species hotspot at SSSI - The site lies less than probably the most significant effect likely to arise. through potential peat habitat to the south risk. Custogion. Two further potential 1km from Gweunydd This represents a long-term, permanent hazard to and east of Llanbrynmair Wind Farm, protected species hotspots are Camnant SSSI, designated for certain groups of birds, primarily the larger along the northern boundary of the Designated Sites: No designated located within 2km of the route. habitats, the River Ithon SSSI species such as swans and to a lesser extent the woodland. sites are likely to be directly and the Esgairdraenllwyn smaller wildfowl. However, the erection of bird affected by the proposed grid Peatland Habitats - The route Pastures SSSI, designated for deflectors in appropriate locations will reduce the Ornithological ‘Hot Spots’ - There are no connections, however there are a passes through two large areas of habitats. risk of birds colliding with the overhead line, and ornithological hotspots associated with the number of designated site which potential peat. It also passes the erection of devices to discourage or prevent route; however the Foel Quarry hotspot is lie in proximity to the routes. through areas identified in roosting on wood pole supports will reduce the approximately 360m to the south. Environmental Statements as risk of predation on ground nesting birds. Habitat Management Plans: Due supporting peat habitats. BNC 3, 4 and 5 - line route section 2b to the location of the wind farm (page 87 of Ref. 1) substations the routes will pass Ornithological ‘Hot Spots’ - The Wind farm Habitat Management Plan Area through a number of wind farm route is not associated with any (HMP) - Approx. 700m of the route passes HMP areas. ornithological hotspots; however the through provisional areas set out for the Tylwch tip hotspot is approx. 400m Tirgwynt HMP. Protected Species: Protected to the north-west. species are likely to be located in Peatland Habitats - No potential peat proximity to the routes. However Sites Designated for Nature areas were identified within the route. full compliance with relevant Conservation Importance (SPA, protected species legislation is SAC, SSSI) - The route does not Ornithological ‘Hot Spots’ - Approximately likely to help to minimise any pass through any statutory 450m of the route passes through the Foel effects. designated sites; however several Quarry ornithological hotspot. designated areas are within a 2km Peatland Habitats: A number of radius, including the River Wye the routes pass through areas of SAC. The closest site is the potential peatland habitat. Gweunydd Camnant SSSI, approx. 55m to the north. Environmental Proposed Grid Connection Topics 2 x 132 kV HDWP circuits to Legacy from SSA B, plus Llandinam connection to Welshpool SSA C Windfarms to Llandinam SP Manweb Collector Llandinam Route to Welshpool SSA B Windfarms to Substation at 2 x 132kV HDWP Summary of Effects Route Substation: Option A Cefn Coch circuits from (Route Options CC1, CC2, CC3 and (Route Options BNC 3, BNC 4, BNC 5: Line Substation at Cefn CC4: Line Route Section 1) Route Sections 1 - 2b) Coch (SSA B) to Legacy Climate As no line route option is considered As no line route option is Not covered in Reference 2. As no line route option is considered to No environmental This topic has not been included Change to have a greater or lesser effect in considered to have a greater have a greater or lesser effect in respect information available. in the environmental respect of this topic at this scale, or lesser effect in respect of of this topic at this scale, this topic has assessments or reports for the this topic has not been included as this topic at this scale, this not been included as it does not assist in routes included in this scenario. it does not assist in identifying a topic has not been included as identifying a line route with least line route with least environmental it does not assist in environmental effect. This topic will be effect. This topic will be considered identifying a line route with considered at the EIA stage. (page 48 of at the EIA stage. (page 48 of Ref. 1) least environmental effect. Ref. 1) This topic will be considered at the EIA stage. (page 48 of Ref. 1) Electric and As no line route option is considered As no line route option is Llandinam Route to Welshpool (Chapter 11 As no line route option is considered to No environmental This topic has not been included Magnetic to have a greater or lesser effect in considered to have a greater of Ref. 2) have a greater or lesser effect in respect information available. in the environmental Fields respect of this topic at this scale, or lesser effect in respect of No significant environmental effects are of this topic at this scale, this topic has assessments or reports for the this topic has not been included as this topic at this scale, this anticipated on electric and magnetic fields. On not been included as it does not assist in routes included in this scenario. it does not assist in identifying a topic has not been included as this basis, the decision was made to not make this identifying a line route with least line route with least environmental it does not assist in topic the subject of a detailed environmental environmental effect. This topic will be effect. This topic will be considered identifying a line route with impact assessment. considered at the EIA stage. (page 48 of at the EIA stage. (page 48 of Ref. 1) least environmental effect. Ref. 1) This topic will be considered at the EIA stage. (page 48 of Ref. 1) Forestry and CC4, CC1 and CC3: Line route SP Manweb Collector Llandinam Route to Welshpool (Chapter 7 of BNC 3, 4 and 5 - line route section 1 No environmental Some trees and hedgerows will Woodland section 1 (page 93 of Ref. 1) Substation: Option A Ref. 2) (page 87 of Ref. 1) information available. be lost to facilitate construction Ancient and Semi-Natural woodland (Tables 6.4 and 6.5 of Ref. It is considered that the proposed overhead line is Other Forestry and Woodland - Route 1 of the grid connection routes. (ASNW) - Route 1 affects one area 1) not likely to result in any significant adverse long- will pass through c.320m of mature The loss of trees may result in of ASNW adjacent to Llwydiarth Other Forestry and Woodland term effects. If the mitigation measures coniferous plantation above Nant y Graig potential habitat loss for bats, Wood which will be avoided, where - There are a number of small discussed in Chapter 7 (Ref. 2) are fully Lwyd, and c.730m of mature coniferous although this is expected to be a possible, at detailed design stage. blocks of forestry and shelter implemented any risk of adverse effects will be plantation at Cors yr Ebolion. Native trees localised effect. belt planting located within further reduced. along the Nant y Graig Lwyd may be Other Forestry and Woodland - the vicinity of the substation affected by the lines. In some locations, mature trees Route 1 crosses some areas of site which will screen and Some trees will be lost to facilitate construction of as well as Ancient and Semi- narrow shelter planting with backdrop the proposed the Amended Development, including trees that BNC 3, 4 and 5 - line route section 2b Natural woodland may be potential felling required on higher substation. The site will not may have potential for bats. This tree loss may (page 87 of Ref. 1) affected by construction of the ground, for example around Ddullui require any felling of existing result in potential habitat loss for bats. Other Forestry and Woodland - 2b may proposed routes. Although this Bank. plantation woodland. affect small stands of woodland south- will be avoided where possible at west of the NG hub. the detailed design stage, limited Within the Nant Feigion valley, felling may be required in some felling of hedgerow and woodland locations. edge trees may be required. Geology and Not included in Reference 3. Not included in Reference 3. Llandinam Route to Welshpool (Chapter 11 Not included in Reference 1. No environmental This topic has not been included Soils of Ref. 2) information available. in the environmental No significant environmental effects are assessments or reports for the anticipated on geology or soil resources. On this routes included in this scenario. basis, the decision was made to not make this topic the subject of a detailed environmental impact assessment. Historic CC4, CC1 and CC3: Line route SP Manweb Collector Llandinam Route to Welshpool (Chapter 8 of BNC 3, 4 and 5 - line route section 1 No environmental Two designated features (SAMs) Environment section 1 (pages 92 and 93 of Substation: Option A Ref. 2) (page 87 of Ref. 1) information available. are located within the Llandinam Ref. 1) (Tables 6.4 and 6.5 of Ref. The proposed overhead line from the Llandinam SAMs - There is 1 SAM within the route route and one within the SP SAMs - No SAMs are located within 1) Repowering Wind Farm to the Welshpool Grid but none within 2km. MWC BNC route. The Llandinam the route. 24 SAMs in 14 groups lie Undesignated Archaeology - Substation, some 35 km long, adopts a course to Route and other routes included within 2km of the route. An undesignated site of the south and east of the Severn Valley which The proximity of the scheduled Bon-y- in this scenario pass within 1- Virtually all the SAMs are prehistoric historical interest (a single takes it past and through some of the richest maen root store and on the farm of which 2km of other historic assets, burial and ritual monuments, some storey derelict stone building) cultural heritage landscapes in mid Wales. it forms a part will form a key including: SAMs, Conservation with wide-ranging views and group lies immediately adjacent to consideration for the detailed line design Areas, Listed Buildings (primarily values. the site to the northeast. There are 55 SAMs located within 2km of the stage and effects on its setting will form a lower grade II but also including overhead line, two of them (Crugyn Bank Dyke key consideration during the EIA stage. higher grade) , historic Environmental Proposed Grid Connection Topics 2 x 132 kV HDWP circuits to Legacy from SSA B, plus Llandinam connection to Welshpool SSA C Windfarms to Llandinam SP Manweb Collector Llandinam Route to Welshpool SSA B Windfarms to Substation at 2 x 132kV HDWP Summary of Effects Route Substation: Option A Cefn Coch circuits from (Route Options CC1, CC2, CC3 and (Route Options BNC 3, BNC 4, BNC 5: Line Substation at Cefn CC4: Line Route Section 1) Route Sections 1 - 2b) Coch (SSA B) to Legacy Listed Buildings (LBs) - No Listed and Bryn Cwmyrhiwdre Round Barrow) within the landscapes, Registered Historic Buildings are located within the 100m wide corridor. There are also 452 Listed Listed Buildings (LBs) - There are no LBs Parks and Gardens and route. There are 10 Listed Buildings Buildings, five Registered Historic Parks and within the route section. There are 2 LBs undesignated below-ground within 2km, all of lower grade II. Gardens, seven Conservation Areas, and one of within 2km of it, both of lower grade II. sites/features. Mitigation Wales’ Registered Historic Landscapes would be measures will be deployed to Conservation Areas - No crossed by the proposed overhead line. Undesignated Archaeology - There are 2 minimise direct effects on Conservation Areas are within 2km undesignated archaeological features in features, however significant of the route section. It is the heritage assets within the 100 m wide the route section. Direct effects will be effects on the setting of a corridor that are most at risk from the proposed avoided, where possible, during detailed number of features are Registered Historic Landscapes overhead line and could be adversely affected by design. predicted. (RHLs) - No RHLs are within 2km of its construction. Most of these are considered to the route. be of low (local) or even negligible value, but BNC 3, 4 and 5 - line route section 2b Only the Llandinam route passes there are some of medium (regional) significance, (page 87 of Ref. 1) through a Registered Historic Undesignated Archaeology - There as well as the few of high (national) importance. SAMs - There are no SAMs within the Landscape resulting in significant are 6 undesignated archaeological Appropriate mitigation (e.g. preservation in situ, route but two within 2km, the Bon-y- effects. features within the route; two of preservation by record, excavation, evaluation, maen root store and Y Capel stone circle. these are buildings and one a watching brief) including the careful demarcation prehistoric cairn. Direct effects will of assets is suggested which should ensure that Listed Buildings (LBs) - There are no be avoided, where possible, during damage is kept to a minimum during the erection Listed Buildings within 2km of the route detailed design. of the supports. section.

Assuming that a full suite of mitigation measures Undesignated Archaeology - There are no is successfully implemented, the proposed undesignated archaeological features in overhead line should not have any significant the route section. long-term effect on the cultural heritage. In particular, there are no likely significant direct effects on cultural heritage arising during the construction, operation or decommissioning of the proposed overhead line.

Inevitably during the operational life of the proposed overhead line, it would have an indirect visual effect on a significant number of designated and registered assets. In a few cases, around six in number, that effect is likely to be very large. It is difficult to identify how such visual effects might be reduced for the density of assets in this region is such that any route adopted would be likely to generate visual issues. These are long-term temporary effects which would last for the operational life of the proposed overhead line but which would be completed removed once the proposed overhead line has been decommissioned. Environmental Proposed Grid Connection Topics 2 x 132 kV HDWP circuits to Legacy from SSA B, plus Llandinam connection to Welshpool SSA C Windfarms to Llandinam SP Manweb Collector Llandinam Route to Welshpool SSA B Windfarms to Substation at 2 x 132kV HDWP Summary of Effects Route Substation: Option A Cefn Coch circuits from (Route Options CC1, CC2, CC3 and (Route Options BNC 3, BNC 4, BNC 5: Line Substation at Cefn CC4: Line Route Section 1) Route Sections 1 - 2b) Coch (SSA B) to Legacy Land Use CC4, CC1 and CC3: Line route No environmental information Not covered in Reference 2. BNC 3, 4 and 5 - line route section 1 No environmental It is not possible to draw section 1 (page 94 of Ref. 1) was covered for this topic. (pages 87 and 88 of Ref. 1) information available. conclusions from the Open space and Green Open space and Green Infrastructure - environmental information Infrastructure - Route 1 crosses one Route 1 routes across approximately available, as all of the routes area of Open Country access and 1,766m of open access land. have not considered this topic. lies within 1km of one other, and within 1km of two areas of BNC 3, 4 and 5 - line route section 2b Registered Common Land. (pages 87 and 88 of Ref. 1) Open space and Green Infrastructure - 2b routes across approximately 694m of open access land. Landscape CC4, CC1 and CC3: Line route SP Manweb Collector Llandinam Route to Welshpool (Chapter 6 of BNC 3, 4 and 5 - line route section 1 No environmental Landscape and visual effects are and section 1 (pages 91 and 92 of Substation: Option A Ref. 2) (page 87 of Ref. 1) information available. likely to arise along the routes of Visual Ref. 1) (Tables 6.4 and 6.5 of Ref. Any likely significant landscape or visual effects Landscape Sensitivity - Route 1 descends this scenario, however the Amenity Landscape Sensitivity - The route 1) would arise during the operational stage from the into the small-medium scale valley of the effects will be localised and will runs north-west from Llanbadarn Landscape Sensitivity - The localised loss of trees and the introduction into the Nant y Graig Lwyd. It traverses a shoulder diminish rapidly with distance across open pasture, below higher open pasture landscape lies landscape of approximately 35 km of new of moorland, remaining behind the ridge from the route. moorland tops to the east and below the higher moorland overhead line on wood pole structures. The line where possible. Between Cwmderwen above the A483. Although visible in tops to the north and east design and routeing of the proposed overhead line and Cors yr Ebolion it crosses medium to Localised significant effects have longer views from the west, the above the A483. The Ithon has been developed to minimise its effects on the large-scale upland pasture. It then passes been identified for visual landscape is of medium sensitivity valley runs to the east of the landscape and visual amenity of the area. across larger-scale moorland plateau, receptors utilising a proportion of due to its scale, blocks and belts of site but is relatively shallow at avoiding the highest ground where the footpaths, roads and coniferous woodland and existing this point. The moderate The location of the Llandinam wind farm on the possible. residential properties sited close wind farms. sized pastoral fields are often Waun Ddubarthog Ridge means that the route is to the routes of this scenario. contained by coniferous more visible at the southern end of the corridor, Visual Sensitivity - The parallel wood pole The route runs through the Ithon shelter belts and larger than further north where it merges into the more lines may be seen on the skyline above Overall, for the SSAC connection, valley but is relatively shallow at woodland blocks, which both diverse and enclosed landscape east of the Severn Nant y Graig Lwyd from locations within effects are more likely for this point. introduce man made Valley. However, the use of wood pole supports Nant-yr-Eira. The lines will be backclothed landscape and visual receptors elements to the landscape helps mitigate the effects within the more open by forestry on the south side of Nant-yr- located close to the southern The route turns west, crossing the and break up and contain and elevated parts of the route. Eira. Beyond Cors yr Ebolion the plateau sections of the proposed route. A483 and Ithon valley across views. The substation is has few inward views and wood poles are This is because this is generally a undulating higher land, with the potentially visible within the Landscape Effects unlikely to be seen. more elevated area with lower 33kV line from Neuadd Goch Wind landscape due to its elevation Although significant or borderline significant, all levels of vegetation cover Farm meeting the line in the vicinity and the relatively open nature the effects were assessed as minor-moderate or From the head of Nant Wythan, 1 will be consequently there would be of Camnant, where a collector of the upland landscape. moderate and none of the effects was assessed as carried on steel towers. These may be greater potential visibility for the substation will be required. The However, the sensitivity of major. The only landscape along the route visible in longer views toward the routes. In comparison, the route drops down from the higher this landscape is medium-low, identified as experiencing a moderate and moorland, e.g. from Cwm Llwyd to the central and northern sections of land at Hirddywel, running cross and there is scope for therefore significant effect is between the A483 south and from the Banwy valley to the the Llandinam – Welshpool route slope just below the highest land at extension of the existing near Old Neuadd Bank and Cae-betin Wood, north. The towers will be partially is routed through more diverse Pegwyn Bank and dropping down areas of coniferous planting including the open hillside below the Kerry screened/backclothed by forestry at and enclosed landscape the steep scarp slope to run west belts which contain views. Ridgeway Regional Trail. Other areas of Mynydd Carreg-y-big in some views. character types, although the through the small Nant Feigion The site includes a belt of landscape (e.g. the Canlad Valley and the Severn corollary is that these sections valley, contained by steep slopes existing coniferous planting Valley) would experience minor-moderate effects Residential Visual Amenity - The parallel tend to be more populous, and woodland blocks. on its southern edge which which would be borderline significant. wood pole lines may be viewed from two therefore a greater number of will both screen, and provide properties at Cwmderwen, descending receptors are likely. Route 1 follows the field pattern, a backdrop for the substation Visual Effects from high ground into Nant-yr-Eira. These using field boundaries and shelter infrastructure. Although significant or verging on significant, all properties would also overlook the Landscape and visual effects are belts to screen and backdrop the the effects were assessed as minor - moderate or crossing of the Afon Gam at relatively likely along line route section 1 route. It will be visible in views in Residential Visual Amenity - moderate and none of these effects was assessed close range. There may be views of the of BNC 3, BNC 4 and BNC5. the generally open landscape but The area is sparsely as major. route from Dolau-ceimion, although the However, these elements of this these views will be broken by populated with only four lines will be backclothed. scenario will be screened from existing planting and will seldom properties within 1km of the In terms of settlements, some properties on the some receptors and directions skyline. substation. Views from edge of Fron Bank/Cilcewydd, which lie within Visitor Attractions - No visitor attractions and the overhead line may residential properties will be 500m of the overhead line will experience a have been identified that would be potentially be seen alongside The route follows local valleys as it limited to the properties at significant change in their view, where there is no affected by BNC1. other above ground equipment descends from the higher ground, Camnant Farm, Camnant screening afforded by landform, buildings or such the turbines of the planned contained by topography and Bridge and one property to vegetation. Of the many individual properties Recreational Resource - The parallel wood wind farms. woodland planting. It will be visible the north-west. These views scattered throughout the study area, only those pole lines would be visible within Nant y Environmental Proposed Grid Connection Topics 2 x 132 kV HDWP circuits to Legacy from SSA B, plus Llandinam connection to Welshpool SSA C Windfarms to Llandinam SP Manweb Collector Llandinam Route to Welshpool SSA B Windfarms to Substation at 2 x 132kV HDWP Summary of Effects Route Substation: Option A Cefn Coch circuits from (Route Options CC1, CC2, CC3 and (Route Options BNC 3, BNC 4, BNC 5: Line Substation at Cefn CC4: Line Route Section 1) Route Sections 1 - 2b) Coch (SSA B) to Legacy intermittently in longer views but will be screened in part by close to the overhead line will experience a Graig Lwyd and Nant yr Eira from the will be set within the landscape. intervening vegetation. significant change in their view some of which will Glyndwr Way, which passes between 300- have views of the proposed overhead line. 500m to the north. Visual Sensitivity - Route 1 will be The distance of the sites from However, the nature of the proposed overhead visible as it crosses the A483, the A483, the local landform, line, combined with the screening effects of BNC 3, 4 and 5 - line route section 2b including both the 132kV alignment and intervening vegetation, landform and vegetation, mean that its effect will (page 87 of Ref. 1) from Llanbadarn and the 33kV from reduces visibility from the be limited, and no views would create effects on Landscape Sensitivity - Route 2b crosses Neuadd Goch. Otherwise the local road. residential amenity to the extent that they would open moorland plateau, largely comprising road network is crossed 3 times. become an undesirable place to live. unenclosed grass moor. It avoids the ridge Recreational Resource - There to the north-west of the NG hub, keeping Residential Visual Amenity - is a relatively dense network Users of local public rights of way and open to the flatter ground to the south of the Residential properties are limited in of public rights of way in the access areas will be variably affected. Where a high point above Gors-dyfwch (418m). the upland landscape, although 5 vicinity of the site; two local pole is seen in close proximity to these areas (e.g. properties are likely to have views public footpaths cross the site the public forest, footpaths and local access roads Visual Sensitivity - Steel towers will be to the route, notably 2 properties at but these can be diverted to near Bryn-picca), the effect on visual amenity will visible in wider views of the moorland Blue Line Farm. an existing track around the be significant, although this effect will diminish plateau. site. There would be views to rapidly with distance. Similarly, road users will be As the line drops off the high the site from the adjacent variably affected. Significant residual effects are Residential Visual Amenity - The ground properties increase, public footpaths and others in noted for the A483 and B4355, although these southward alignment of 2b takes it further including those at Cloesfynnon and the vicinity; however use of effects would be localised and transient. from the properties at Carreg-y-big and Rhiw-felen, which will have views to the footpaths does not appear Gwaenydd, and the towers would be a the line. to be high. lesser presence in views.

Visitor Attractions - No visitor Visitor Attractions - There may be views of attractions have been identified that the towers at the head of the upland would be directly or indirectly valley as seen from the outdoor centre at affected by route 1. Plas y drain, 1800m to the north-east.

Recreational Resource - Route 1 Recreational Resource - No recreational crosses Glwyndwr’s Way once and a resources have been identified that would moderate density of RoWs also be affected by 2b. cross or run adjacent to the line.

Lighting Not included in Reference 1. Not included in Reference 1. Llandinam Route to Welshpool (Chapter 11 Not included in Reference 1. No environmental This topic has not been included of Ref. 2) information available. in the environmental No significant environmental effects are assessments or reports for the anticipated on lighting. On this basis, the decision routes included in this scenario. was made to not make this topic the subject of a detailed environmental impact assessment. Noise and As no line route option is considered As no line route option is Llandinam Route to Welshpool (Chapter 11 As no line route option is considered to No environmental It is not possible to draw Vibration to have a greater or lesser effect in considered to have a greater of Ref. 2) have a greater or lesser effect in respect information available. conclusions from the respect of this topic at this scale, or lesser effect in respect of No significant environmental effects are of this topic at this scale, this topic has environmental information this topic has not been included as this topic at this scale, this anticipated for noise. On this basis, the decision not been included as it does not assist in available, as all of the routes it does not assist in identifying a topic has not been included as was made to not make this topic the subject of a identifying a line route with least have not considered this topic. line route with least environmental it does not assist in detailed environmental impact assessment. This environmental effect. This topic will be effect. This topic will be considered identifying a line route with is because of the low intensity of construction considered at the EIA stage. (page 48 of at the EIA stage. (page 48 of Ref. 1) least environmental effect. activities, the very low volume of vehicle Ref. 1) This topic will be considered movements which construction of the proposed at the EIA stage. (page 48 of overhead line would generate, the short-term Ref. 1) (days rather than weeks) and reversible activities at each wood pole structure, and the proven methods of noise control at construction sites.

While the Draft Construction Method Statement Environmental Proposed Grid Connection Topics 2 x 132 kV HDWP circuits to Legacy from SSA B, plus Llandinam connection to Welshpool SSA C Windfarms to Llandinam SP Manweb Collector Llandinam Route to Welshpool SSA B Windfarms to Substation at 2 x 132kV HDWP Summary of Effects Route Substation: Option A Cefn Coch circuits from (Route Options CC1, CC2, CC3 and (Route Options BNC 3, BNC 4, BNC 5: Line Substation at Cefn CC4: Line Route Section 1) Route Sections 1 - 2b) Coch (SSA B) to Legacy will ultimately address noise control issues in detail it is noted that Powys CC has powers to investigate noise complaints and serve abatement notices on activities which it considers are giving rise to unacceptable levels of noise

Socio As no line route option is considered As no line route option is Llandinam Route to Welshpool (Chapter 10 As no line route option is considered to No environmental It is not possible to draw Economics to have a greater or lesser effect in considered to have a greater of Ref. 2) have a greater or lesser effect in respect information available. conclusions from the (including respect of this topic at this scale, or lesser effect in respect of The design and routeing of the proposed overhead of this topic at this scale, this topic has environmental information Tourism and this topic has not been included as this topic at this scale, this line has been developed to minimise its effects on not been included as it does not assist in available, as all of the routes Recreation) it does not assist in identifying a topic has not been included as visual amenity and consequently upon negative identifying a line route with least have not considered this topic. line route with least environmental it does not assist in perceptions of tourists and residents alike. The environmental effect. This topic will be effect. This topic will be considered identifying a line route with proposed overhead line generally avoids major considered at the EIA stage. (page 48 of at the EIA stage. (page 48 of Ref. 1) least environmental effect. settlements, tourist attractions, and local amenity Ref. 1) This topic will be considered assets. at the EIA stage. (page 48 of Ref. 1) No significant socio-economic effects would arise from the construction and decommissioning of the proposed overhead line.

The operational stage would be expected to have a moderately significant effect upon tourism accommodation at two sites namely the Tavern Caravan Park and Edderton Hall B&B/Guest House. If proposed mitigation is accepted the residual effects would become not significant at Tavern Caravan Park but remain moderately significant for Edderton Hall B&B/Guest House. Traffic and CC4, CC1 and CC3: Line route SP Manweb Collector Llandinam Route to Welshpool (Chapter 11 BNC 3, 4 and 5 - line route section 1 No environmental Most routes/sites in this scenario Transport section 1 (page 95 of Ref. 1) Substation: Option A of Ref. 2) (page 88 of Ref. 1) information available. are accessible by existing farm This route could be accessed via (Tables 6.4 and 6.5 of Ref. No significant environmental effects are Access to the route will be via existing tracks or main public roads. existing main public roads although 1) anticipated on traffic and transport. On this basis, forest tracks across steep ground. However, localised instances there are two extended sections The site is accessible from the decision was made to not make this topic the may occur where the terrain (the area south of Hirddywell and existing farm tracks. subject of a detailed environmental impact BNC 3, 4 and 5 - line route section 2b makes access difficult, or large north-west of Esgaidraenliwyn) assessment. (page 88 of Ref. 1) lengths of new access road are where access will be difficult due to Access to the route will be via existing required. steep land and a lack of existing The main issue of concern with respect to traffic forest tracks across steep ground. tracks. would be the creation of construction and maintenance accesses and then accessing otherwise inaccessible fields with construction vehicles. This would be set out in the Draft Construction and Method Statement as part of the planning conditions, and would be developed in consultation with Powys Highways Authority. Waste As no line route option is considered As no line route option is Llandinam Route to Welshpool (Chapter 11 As no line route option is considered to No environmental This topic has not been included Management to have a greater or lesser effect in considered to have a greater of Ref. 2) have a greater or lesser effect in respect information available. in the environmental respect of this topic at this scale, or lesser effect in respect of No significant environmental effects are of this topic at this scale, this topic has assessments or reports for the this topic has not been included as this topic at this scale, this anticipated on waste management. On this basis, not been included as it does not assist in routes included in this scenario. Environmental Proposed Grid Connection Topics 2 x 132 kV HDWP circuits to Legacy from SSA B, plus Llandinam connection to Welshpool SSA C Windfarms to Llandinam SP Manweb Collector Llandinam Route to Welshpool SSA B Windfarms to Substation at 2 x 132kV HDWP Summary of Effects Route Substation: Option A Cefn Coch circuits from (Route Options CC1, CC2, CC3 and (Route Options BNC 3, BNC 4, BNC 5: Line Substation at Cefn CC4: Line Route Section 1) Route Sections 1 - 2b) Coch (SSA B) to Legacy it does not assist in identifying a topic has not been included as the decision was made to not make this topic the identifying a line route with least line route with least environmental it does not assist in subject of a detailed environmental impact environmental effect. This topic will be effect. This topic will be considered identifying a line route with assessment. considered at the EIA stage. (page 48 of at the EIA stage. (page 48 of Ref. 1) least environmental effect. Ref. 1) This topic will be considered at the EIA stage. (page 48 of Ref. 1) Water CC4, CC1 and CC3: Line route SP Manweb Collector Llandinam Route to Welshpool (Chapter 9 of BNC 3, 4 and 5 - line route section 1 No environmental Flood risk is not expected to be Environment section 1 (page 93 of Ref. 1) Substation: Option A Ref. 2) (page 87 of Ref. 1) information available. an issue for the routes included Water Quality - Route 1 crosses four (Tables 6.4 and 6.5 of Ref. It is considered that, if the mitigation measures Flood Risk - Route 1 crosses the Afon Gam in this scenario. The routes will tributaries of the River Wye SAC 1) discussed above and detailed fully in the Draft flood zone north of Cwmderwen. The Afon cross many tributaries, including and River Ithon SSSI. Flood Zones - A narrow flood Construction Method Statement are successfully Gam is approximately 120m wide at this rivers within SSSIs and SACs zone lies 0.3km to the north implemented, the construction, operation and point and will not pose a constraint to the however these can be spanned Flood Risk - Route 1 crosses four and 0.7km to the east of the decommissioning effects of the proposed route. by wood pole infrastructure and narrow tributaries of the River Ithon site. It is less than 50m wide overhead line on hydrology, groundwater, flood mitigation measures will ensure flood zone, which are 35 to 80m in and will not be affected by the risk and water quality would not result in any BNC 3, 4 and 5 - line route section 2b their protection during width and will not form a constraint substation. likely significant adverse long term effects. (page 87 of Ref. 1) construction. to routeing. Flood Risk - 2b does not cross any flood zone. Technical CC4, CC1 and CC3: Line route SP Manweb Collector Not covered in Reference 2. BNC 3, 4 and 5 - line route section 1 No environmental This information is not applicable Review section 1 (page 94 of Ref. 1) Substation: Option A (page 88 of Ref. 1) information available. to cumulative impacts as it has Existing and Proposed OHL (Tables 6.4 and 6.5 of Ref. Existing and Proposed OHL Infrastructure been included for reference only. Infrastructure 33kV and 132kV - 1) 33kV and 132kV - This route would be The Llandinam OHL route would This site could accommodate crossed by the Nant y Moch Wind Farm cross this at the eastern end of the the required equipment. OHL route. route. Existing and Proposed Wind Turbines - Existing and Proposed Wind The route passes within proximity of a Turbines - The route passes within number of turbines, however the required proximity of turbines; however it distance from turbines can be maintained will be possible to maintain the during the detailed design stage. required distance. Altitude and Topography - The route Altitude and Topography - The would start at a height of 340m, reducing eastern end of this route would to 260m at the Afon Gam before cover altitudes of up to 455m at the increasing in height to 380m. Gradients substation at Llanbadarn Fynydd. would be 0-150. Moving west, the land height is 373m at the Neuadd Goch BNC 3, 4 and 5 - line route section 2b substation. As the line moves south- (page 88 of Ref. 1) west, land heights increase to Existing and Proposed OHL Infrastructure around 420m at Llaithddu and then 33kV and 132kV - This route would be higher to around 550m at crossed by the Nant y Moch OHL route. Hirddywel. Gradients range between 0-15°. As the line passes west of Existing and Proposed Wind Turbines - Hirddywel, there is a section of land The route passes within proximity of a with a gradient of between 15-22°. number of potential turbines, and it may The height of land then reduces to not be possible to maintain the required around 320m as the route moves distance at the eastern end. west before turning north. Altitude and Topography - The land height increases from 360m to 410m before reducing to 370m at the substation. Gradients are between 0-150.

References (Ref.):

(1) SP MANWEB (Sept 2013). SP Mid Wales Connections, Line Routing Methodology & Appraisal - Phase 3 Report.

(2) SP MANWEB (Oct 2013). Volume 1: New 132kV Overhead Line Connection from Llandinam Wind Farm to Welshpool Substation - Updated Environmental Statement.

(3) National Grid (Sept 2013). Mid Wales Connection Project, Draft Substation Site Report.

(4) National Grid (Sept 2013). Mid Wales Connection Project, Draft Route Report.

Table I: Scenario 8a - 2 x 132 kV circuits to Legacy, plus a 132 kV circuit between SSA B and SSA C, plus Llandinam connection to Welshpool

Environmental Proposed Grid Connection Topics 2 x 132 kV circuits (2 x HDWP or an L4 tower line) to Legacy from SSA B, plus a 132 kV circuit between SSA B and SSA C, plus Llandinam connection to Welshpool SSA C Windfarms to SP Manweb Llandinam Route to SSA B Windfarms to Substation at Proposed National Grid 400kV 2 x 132kV HDWP Summary of Effects Llandinam Route and Collector Welshpool Cefn Coch Substation - Cefn Coch circuits from Substation at Cefn Coch Substation: (Route Options BNC 3, BNC 4, BNC 5: (Preferred Substation Location NW Substation at Cefn (Route Options CC1, CC2, CC3 Option A Line Route Sections 1 - 2b) at Cefn Coch) Coch (SSA B) to and CC4: Line Route Sections 1- Legacy 2a-3-4b-5-6a-7a-8-9a-10) Sites Designated for Nature Peatland Habitats: A number of Conservation Importance (SPA, the routes pass through areas of SAC, SSSI) - The route does not potential peatland habitat. pass through any statutory designated sites; however several designated areas are within a 2km radius, including the River Wye SAC and the Llan Mawr SSSI. The closest site is the Gweunydd Camnant SSSI, approx. 55m to the north of line route section 1. Climate As no line route option is As no line route Not covered in Reference 2. As no line route option is considered to Not included in Reference 3. No environmental This topic has not been included Change considered to have a greater or option is considered have a greater or lesser effect in information available. in the environmental lesser effect in respect of this to have a greater or respect of this topic at this scale, this assessments or reports for the topic at this scale, this topic has lesser effect in topic has not been included as it does routes included in this scenario. not been included as it does not respect of this topic not assist in identifying a line route assist in identifying a line route at this scale, this with least environmental effect. This with least environmental effect. topic has not been topic will be considered at the EIA This topic will be considered at included as it does stage. (page 48 of Ref. 1) the EIA stage. (page 48 of Ref. not assist in 1) identifying a line route with least environmental effect. This topic will be considered at the EIA stage. (page 48 of Ref. 1) Electric and As no line route option is As no line route Llandinam Route to As no line route option is considered to Not included in Reference 3. No environmental This topic has not been included Magnetic considered to have a greater or option is considered Welshpool (Chapter 11 of have a greater or lesser effect in information available. in the environmental Fields lesser effect in respect of this to have a greater or Ref. 2) respect of this topic at this scale, this assessments or reports for the topic at this scale, this topic has lesser effect in No significant environmental topic has not been included as it does routes included in this scenario. not been included as it does not respect of this topic effects are anticipated on not assist in identifying a line route assist in identifying a line route at this scale, this electric and magnetic fields. with least environmental effect. This with least environmental effect. topic has not been On this basis, the decision was topic will be considered at the EIA This topic will be considered at included as it does made to not make this topic stage. (page 48 of Ref. 1) the EIA stage. (page 48 of Ref. not assist in the subject of a detailed 1) identifying a line environmental impact route with least assessment. environmental effect. This topic will be considered at the EIA stage. (page 48 of Ref. 1) Environmental Proposed Grid Connection Topics 2 x 132 kV circuits (2 x HDWP or an L4 tower line) to Legacy from SSA B, plus a 132 kV circuit between SSA B and SSA C, plus Llandinam connection to Welshpool SSA C Windfarms to SP Manweb Llandinam Route to SSA B Windfarms to Substation at Proposed National Grid 400kV 2 x 132kV HDWP Summary of Effects Llandinam Route and Collector Welshpool Cefn Coch Substation - Cefn Coch circuits from Substation at Cefn Coch Substation: (Route Options BNC 3, BNC 4, BNC 5: (Preferred Substation Location NW Substation at Cefn (Route Options CC1, CC2, CC3 Option A Line Route Sections 1 - 2b) at Cefn Coch) Coch (SSA B) to and CC4: Line Route Sections 1- Legacy 2a-3-4b-5-6a-7a-8-9a-10) Forestry and CC1, CC2, CC3 and CC4: Line SP Manweb Llandinam Route to BNC 3, 4 and 5 - line route section Not included in Reference 3. No environmental Some trees and hedgerows will Woodland Route Sections 1-2a-3-4b-5- Collector Welshpool (Chapter 7 of 1 (page 87 of Ref. 1) information available. be lost to facilitate construction 6a-7a-8-9a-10 (Appendix 6.1 Substation: Ref. 2) Other Forestry and Woodland - Route 1 of the grid connection routes. of Ref. 1) Option A (Tables It is considered that the will pass through c.320m of mature The loss of trees may result in Ancient and Semi-Natural 6.4 and 6.5 of proposed overhead line is not coniferous plantation above Nant y potential habitat loss for bats, woodland (ASNW) - Line route Ref. 1) likely to result in any significant Graig Lwyd, and c.730m of mature although this is expected to be a sections 1, 4b, and 6a will affect Other Forestry and adverse long-term effects. If coniferous plantation at Cors yr localised effect. areas of ASNW, this will be Woodland - There the mitigation measures Ebolion. Native trees along the Nant y avoided, where possible, at are a number of discussed in Chapter 7 (Ref. 2) Graig Lwyd may be affected by the In some locations, mature trees detailed design stage. Line small blocks of are fully implemented any risk lines. as well as Ancient and Semi- route sections 2a, 3, 4b, 7a and forestry and shelter of adverse effects will be Natural woodland may be 8 affect areas of ASNW and belt planting further reduced. BNC 3, 4 and 5 - line route section affected by construction of the limited felling may be required. located within the 2b (page 87 of Ref. 1) proposed routes. Although this vicinity of the Some trees will be lost to Other Forestry and Woodland - 2b may will be avoided where possible at Other Forestry and Woodland - substation site facilitate construction of the affect small stands of woodland south- the detailed design stage, limited All line route sections cross which will screen Amended Development, west of the NG hub. felling may be required in some some fields where limited felling and backdrop the including trees that may have locations. of hedgerow trees, and in some proposed potential for bats. This tree loss cases (e.g. line route sections 1 substation. The may result in potential habitat and 3) woodland edge trees. site will not require loss for bats. Line route section 9a passes any felling of through 5.9ha of woodland on existing plantation the Welsh National Forest woodland. Inventory although no mature trees would be felled. Geology and Not included in Reference 3. Not included in Llandinam Route to Not included in Reference 1. Not included in Reference 3. No environmental This topic has not been included Soils Reference 3. Welshpool (Chapter 11 of information available. in the environmental Ref. 2) assessments or reports for the No significant environmental routes included in this scenario. effects are anticipated on geology or soil resources. On this basis, the decision was made to not make this topic the subject of a detailed environmental impact assessment. Historic CC1, CC2, CC3 and CC4: Line SP Manweb Llandinam Route to BNC 3, 4 and 5 - line route section Preferred Substation Location No environmental Two designated features (SAMs) Environment Route Sections 1-2a-3-4b-5- Collector Welshpool (Chapter 8 of 1 (page 87 of Ref. 1) NW (Section 10.2 of Ref. 3) information available. are located within the Llandinam 6a-7a-8-9a-10 (Appendix 6.1 Substation: Ref. 2) SAMs - There is 1 SAM within the route The site is located in an area where route and one within the SP of Ref. 1) Option A (Tables The proposed overhead line but none within 2km. there are no key local receptors, but MWC BNC route. The Llandinam SAMs - The northen area of the 6.4 and 6.5 of from the Llandinam Repowering it is located roughly equidistant Route and other routes included route contains more SAMs that Ref. 1) Wind Farm to the Welshpool The proximity of the scheduled Bon-y- between a scheduled Kerb Cairn in this scenario pass within 1- are within 2km of the route. Undesignated Grid Substation, some 35 km maen root store and on the farm of (WSM MG 327), a scheduled stone 2km of other historic assets, For example, no SAMs are Archaeology - An long, adopts a course to the which it forms a part will form a key circle (WSM MG 179), and a root including: SAMs, Conservation located within line route section undesignated site of south and east of the Severn consideration for the detailed line store (WSM MG 218). These sites Areas, Listed Buildings (primarily 1 but 24 SAMs lie in 14 groups historical interest (a Valley which takes it past and design stage and effects on its setting are situated approximately 2km lower grade II but also including within 2km of the route and line single storey through some of the richest will form a key consideration during the away from the substation, and higher grade), historic route sections 2a-5 have no derelict stone cultural heritage landscapes in EIA stage. outside of any identified areas of landscapes, Registered Historic SAMs within 2km of the route. building) lies mid Wales. theoretical visibility. However, Parks and Gardens and Whereas line route sections 6a- immediately Listed Buildings (LBs) - There are no whilst the substation site will not be undesignated below-ground 10 all have SAMs located within adjacent to the site There are 55 SAMs located LBs within the route section. There are visible from any of these sites/features. Mitigation 2km of the route. to the northeast. within 2km of the overhead 2 LBs within 2km of it, both of lower monuments, the proposed overhead measures will be deployed to line, two of them (Crugyn Bank grade II. line is potentially visible from the minimise direct effects on Virtually all the SAMs are Dyke and Bryn Cwmyrhiwdre root store and may have a slightly features, however significant prehistoric burial and ritual Round Barrow) within the Undesignated Archaeology - There are adverse effect upon its landscape effects on the setting of a monuments, some with wide- 100m wide corridor. There are 2 undesignated archaeological features context. number of features are ranging views, others are rare also 452 Listed Buildings, five in the route section. Direct effects will predicted. Environmental Proposed Grid Connection Topics 2 x 132 kV circuits (2 x HDWP or an L4 tower line) to Legacy from SSA B, plus a 132 kV circuit between SSA B and SSA C, plus Llandinam connection to Welshpool SSA C Windfarms to SP Manweb Llandinam Route to SSA B Windfarms to Substation at Proposed National Grid 400kV 2 x 132kV HDWP Summary of Effects Llandinam Route and Collector Welshpool Cefn Coch Substation - Cefn Coch circuits from Substation at Cefn Coch Substation: (Route Options BNC 3, BNC 4, BNC 5: (Preferred Substation Location NW Substation at Cefn (Route Options CC1, CC2, CC3 Option A Line Route Sections 1 - 2b) at Cefn Coch) Coch (SSA B) to and CC4: Line Route Sections 1- Legacy 2a-3-4b-5-6a-7a-8-9a-10) prehistoric house sites. Registered Historic Parks and be avoided, where possible, during An undesignated group of pillow Gardens, seven Conservation detailed design. mounds (WNMR 9448) of regional Only the Llandinam route passes Listed Buildings (LBs) - All line Areas, and one of Wales’ importance is located to the south through a Registered Historic route sections, apart from 9a Registered Historic Landscapes BNC 3, 4 and 5 - line route section east. Whilst the substation site will Landscape resulting in significant and 10 are within 2km of LBs, would be crossed by the 2b (page 87 of Ref. 1) not be visible, the proposed effects. the majority of which are lower proposed overhead line. SAMs - There are no SAMs within the overhead lines into and out of the grade II. However, some line route but two within 2km, the Bon-y- substation, are potentially visible route sections (e.g. 5) have LBs It is the heritage assets within maen root store and Y Capel stone and may have a slightly adverse of higher grade II* desginated the 100 m wide corridor that circle. effects upon their landscape status. LBs that are within close are most at risk from the context. proximity (i.e. 150m) of the proposed overhead line and Listed Buildings (LBs) - There are no route such as Ystradfaelog could be adversely affected by Listed Buildings within 2km of the which is the higher grade II* its construction. Most of these route section. building along line route section are considered to be of low 5, could be the possibility of (local) or even negligible value, Undesignated Archaeology - There are visual impact. but there are some of medium no undesignated archaeological (regional) significance, as well features in the route section. Conservation Areas - Only line as the few of high (national) route section 3 is located within importance. Appropriate 2km of a Conservation Area, mitigation (e.g. preservation in which is Llanidloes Conservation situ, preservation by record, Area. excavation, evaluation, watching brief) including the Registered Historic Landscapes careful demarcation of assets is (RHLs) - Line route sections 2a, suggested which should ensure 3, 5 and 6a are within 1-2km of that damage is kept to a Clywedog Valley RHL and/or minimum during the erection of Caersws Basin RHL. the supports.

Undesignated Archaeology - Assuming that a full suite of Undesignated archaeological mitigation measures is features are located along most successfully implemented, the line route sections. Direct proposed overhead line should effects will be avoided, where not have any significant long- possible, during detailed design. term effect on the cultural heritage. In particular, there are no likely significant direct effects on cultural heritage arising during the construction, operation or decommissioning of the proposed overhead line.

Inevitably during the operational life of the proposed overhead line, it would have an Environmental Proposed Grid Connection Topics 2 x 132 kV circuits (2 x HDWP or an L4 tower line) to Legacy from SSA B, plus a 132 kV circuit between SSA B and SSA C, plus Llandinam connection to Welshpool SSA C Windfarms to SP Manweb Llandinam Route to SSA B Windfarms to Substation at Proposed National Grid 400kV 2 x 132kV HDWP Summary of Effects Llandinam Route and Collector Welshpool Cefn Coch Substation - Cefn Coch circuits from Substation at Cefn Coch Substation: (Route Options BNC 3, BNC 4, BNC 5: (Preferred Substation Location NW Substation at Cefn (Route Options CC1, CC2, CC3 Option A Line Route Sections 1 - 2b) at Cefn Coch) Coch (SSA B) to and CC4: Line Route Sections 1- Legacy 2a-3-4b-5-6a-7a-8-9a-10) indirect visual effect on a significant number of designated and registered assets. In a few cases, around six in number, that effect is likely to be very large. It is difficult to identify how such visual effects might be reduced for the density of assets in this region is such that any route adopted would be likely to generate visual issues. These are long-term temporary effects which would last for the operational life of the proposed overhead line but which would be completed removed once the proposed overhead line has been decommissioned.

Land Use CC1, CC2, CC3 and CC4: Line No environmental Not covered in Reference 2. BNC 3, 4 and 5 - line route section Not included in Reference 4. No environmental It is not possible to draw Route Sections 1-2a-3-4b-5- information was 1 (pages 87 and 88 of Ref. 1) information available. conclusions from the 6a-7a-8-9a-10 (Appendix 6.1 covered for this Open space and Green Infrastructure - environmental information of Ref. 1) topic. Route 1 routes across approximately available, as all of the routes Open space and Green 1,766m of open access land. have not considered this topic. Infrastructure - Line route section 1 crosses one area of BNC 3, 4 and 5 - line route section Open Country access and lies 2b (pages 87 and 88 of Ref. 1) within 1km of one other, and Open space and Green Infrastructure - within 1km of two areas of 2b routes across approximately 694m Registered Common Land. of open access land. Environmental Proposed Grid Connection Topics 2 x 132 kV circuits (2 x HDWP or an L4 tower line) to Legacy from SSA B, plus a 132 kV circuit between SSA B and SSA C, plus Llandinam connection to Welshpool SSA C Windfarms to SP Manweb Llandinam Route to SSA B Windfarms to Substation at Proposed National Grid 400kV 2 x 132kV HDWP Summary of Effects Llandinam Route and Collector Welshpool Cefn Coch Substation - Cefn Coch circuits from Substation at Cefn Coch Substation: (Route Options BNC 3, BNC 4, BNC 5: (Preferred Substation Location NW Substation at Cefn (Route Options CC1, CC2, CC3 Option A Line Route Sections 1 - 2b) at Cefn Coch) Coch (SSA B) to and CC4: Line Route Sections 1- Legacy 2a-3-4b-5-6a-7a-8-9a-10) Landscape CC1, CC2, CC3 and CC4: Line SP Manweb Llandinam Route to BNC 3, 4 and 5 - line route section Preferred Substation Location No environmental Landscape and visual effects are and Route Sections 1-2a-3-4b-5- Collector Welshpool (Chapter 6 of 1 (page 87 of Ref. 1) NW (Section 10.2 of Ref. 3) information available. likely to arise along the routes of Visual 6a-7a-8-9a-10 (Appendix 6.1 Substation: Ref. 2) Landscape Sensitivity - Route 1 Whilst currently a substation in this this scenario, however the Amenity of Ref. 1) Option A (Tables Any likely significant landscape descends into the small-medium scale remote rural location would effects will be localised and will Landscape and visual amenity 6.4 and 6.5 of or visual effects would arise valley of the Nant y Graig Lwyd. It represent a detracting urban diminish rapidly with distance varies along the route. Along Ref. 1) during the operational stage traverses a shoulder of moorland, element, which would be from the route. certain line route sections short Landscape from the localised loss of trees remaining behind the ridge line where inconsistent with the local landscape sections of sky lining will occur Sensitivity - The and the introduction into the possible. Between Cwmderwen and character, this situation is likely to Localised significant effects have (e.g. line route section 2a), and open pasture landscape of approximately 35 Cors yr Ebolion it crosses medium to change with the construction of the been identified for visual the line route sections will be landscape lies km of new overhead line on large-scale upland pasture. It then Tirgwynt wind farm and Mynydd receptors utilising a proportion of visible as they drop down into below the higher wood pole structures. The passes across larger-scale moorland Waen Fawr wind farm (if the footpaths, roads and valleys, such as Afon Trannon moorland tops to design and routeing of the plateau, avoiding the highest ground constructed) as the proposed residential properties sited close Valley. However, some line the north and east proposed overhead line has where possible. substation would potentially be seen to the routes of this scenario. route sections are provided with above the A483. been developed to minimise its alongside above ground equipment natural screening in areas by The Ithon valley effects on the landscape and Visual Sensitivity - The parallel wood such as overhead electricity lines, Overall, for the SSAC connection existing hedgerow and riparian runs to the east of visual amenity of the area. pole lines may be seen on the skyline pylons and the turbines of the to Welshpool, effects are more trees, and line route sections, the site but is above Nant y Graig Lwyd from Tirgwynt Wind farm and other likely for landscape and visual such as line route section 1, relatively shallow at The location of the Llandinam locations within Nant-yr-Eira. The lines planned wind farms. The Overall receptors located close to the follow the field pattern, using this point. The wind farm on the Waun will be backclothed by forestry on the Visual and Sensory Evaluation southern sections of the field boundaries and shelter moderate sized Ddubarthog Ridge means that south side of Nant-yr-Eira. Beyond (VS50) of the site is High. proposed route. This is because belts to screen and backdrop pastoral fields are the route is more visible at the Cors yr Ebolion the plateau has few this is generally a more elevated the route. often contained by southern end of the corridor, inward views and wood poles are The ZTV suggests that a substation area with lower levels of coniferous shelter than further north where it unlikely to be seen. in this location may just be visible vegetation cover consequently Line route sections, such as 6a, belts and larger merges into the more diverse from Snowdonia National Park in the there would be greater potential pass through relatively open woodland blocks, and enclosed landscape east of From the head of Nant Wythan, 1 will high area of Mynydd Clywedog. This visibility for the routes. In landscapes above the valley which both the Severn Valley. However, be carried on steel towers. These may would be at a distance of 15km and comparison, the central and floor and will be visible in views introduce man the use of wood pole supports be visible in longer views toward the it is likely that the substation would northern sections of the across valleys, although these made elements to helps mitigate the effects moorland, e.g. from Cwm Llwyd to the be imperceptible from this distance. Llandinam – Welshpool route is views will be back dropped by the landscape and within the more open and south and from the Banwy valley to the routed through more diverse and wooded slopes. Line route break up and elevated parts of the route. north. The towers will be partially The ZTV indicates that the site is enclosed landscape character section 6a will also be locally contain views. The screened/backclothed by forestry at visually well contained due to the types, although the corollary is prominent as it runs around the substation is Landscape Effects Mynydd Carreg-y-big in some views. surrounding landform which that these sections tend to be Allt y Genlli hillside above potentially visible Although significant or provides natural screening on three more populous, therefore a Tanyrallt. Also,in certain within the borderline significant, all the Residential Visual Amenity - The sides. Areas of potential visibility greater number of receptors are lcoations, line route sections landscape due to its effects were assessed as parallel wood pole lines may be viewed are largely restricted to the sparsely likely. pass through areas of ancient elevation and the minor-moderate or moderate from two properties at Cwmderwen, populated valley and surrounding The SSAC connection to Cefn and semi-natural woodland and relatively open and none of the effects was descending from high ground into hill slopes to the north-east, Coch will be visible as it crosses scattered properties. nature of the assessed as major. The only Nant-yr-Eira. These properties would including the lower slopes of roads and within valleys and upland landscape. landscape along the route also overlook the crossing of the Afon Mynydd Waun Fawr, the Mynydd y there are likely to be potential Potential visual effects are However, the identified as experiencing a Gam at relatively close range. There Gribin ridgeline and Foel Fawr. visual effects on a number of possible for residential sensitivity of this moderate and therefore may be views of the route from Dolau- residential properties. properties, such as Oakley Park, landscape is significant effect is between the ceimion, although the lines will be It is anticipated that there would be which will have views of line medium-low, and A483 near Old Neuadd Bank backclothed. unrestricted and filtered views of Landscape and visual effects are route section 4b. Line route there is scope for and Cae-betin Wood, including the development from Gwaenydd likely along line route section 1 section 4b will also have further extension of the the open hillside below the Visitor Attractions - No visitor and potentially from a few other of BNC 3, BNC 4 and BNC5. effects on individual properties existing areas of Kerry Ridgeway Regional Trail. attractions have been identified that scattered properties further afield. However, these elements of this along the route, notably at Red coniferous planting Other areas of landscape (e.g. would be affected by BNC1. There would also be views from the scenario will be screened from House and Ty’n-y-celyn. belts which contain the Canlad Valley and the public right of way network, but no some receptors and directions views. The site Severn Valley) would Recreational Resource - The parallel views from the local lanes. In those and the overhead line may Line route sections, such as line includes a belt of experience minor-moderate wood pole lines would be visible within locations where the proposed potentially be seen alongside route section 1, will be visible as existing coniferous effects which would be Nant y Graig Lwyd and Nant yr Eira substation is likely to be visible, it other above ground equipment they cross roads (e.g. A483). planting on its borderline significant. from the Glyndwr Way, which passes would potentially be seen alongside such the turbines of the planned southern edge between 300-500m to the north. above ground equipment such as wind farms. Effects on visitor attractions are which will both Visual Effects overhead electricity lines, pylons unlikely to arise from the route screen, and provide Although significant or verging BNC 3, 4 and 5 - line route section and the turbines of some of the Effects are likely for landscape beyond localised effects on a backdrop for the on significant, all the effects 2b (page 87 of Ref. 1) planned wind farms. and visual receptors around the public footpaths. substation were assessed as minor - Landscape Sensitivity - Route 2b substation at Cefn Coch than the Environmental Proposed Grid Connection Topics 2 x 132 kV circuits (2 x HDWP or an L4 tower line) to Legacy from SSA B, plus a 132 kV circuit between SSA B and SSA C, plus Llandinam connection to Welshpool SSA C Windfarms to SP Manweb Llandinam Route to SSA B Windfarms to Substation at Proposed National Grid 400kV 2 x 132kV HDWP Summary of Effects Llandinam Route and Collector Welshpool Cefn Coch Substation - Cefn Coch circuits from Substation at Cefn Coch Substation: (Route Options BNC 3, BNC 4, BNC 5: (Preferred Substation Location NW Substation at Cefn (Route Options CC1, CC2, CC3 Option A Line Route Sections 1 - 2b) at Cefn Coch) Coch (SSA B) to and CC4: Line Route Sections 1- Legacy 2a-3-4b-5-6a-7a-8-9a-10) infrastructure. moderate or moderate and crosses open moorland plateau, largely The visual effects arising from a SP Manweb Collector Substation: none of these effects was comprising unenclosed grass moor. It substation in this location could be Option A. It is anticipated that Residential Visual assessed as major. avoids the ridge to the north-west of lessened by perimeter mounding there would be unrestricted and Amenity - The area the NG hub, keeping to the flatter supplemented by planting which filtered views of the substation at is sparsely In terms of settlements, some ground to the south of the high point could include a high proportion of Cefn Coch from the surrounding populated with only properties on the edge of Fron above Gors-dyfwch (418m). conifers. The proximity of the site to area, and it would potentially be four properties Bank/Cilcewydd, which lie existing mature coniferous seen alongside above ground within 1km of the within 500m of the overhead Visual Sensitivity - Steel towers will be plantations and shelter belts equipment such as overhead substation. Views line will experience a significant visible in wider views of the moorland provides a structural planting electricity lines and the turbines from residential change in their view, where plateau. context. However the screening of the planned wind farms. properties will be there is no screening afforded benefits would only be achieved in limited to the by landform, buildings or Residential Visual Amenity - The the long term as the planting properties at vegetation. Of the many southward alignment of 2b takes it reached full maturity. Also the Camnant Farm, individual properties scattered further from the properties at Carreg- entries and exit for the overhead Camnant Bridge throughout the study area, only y-big and Gwaenydd, and the towers lines would have to kept free from and one property to those close to the overhead line would be a lesser presence in views. tall vegetation and views of the the north-west. will experience a significant infrastructure would potentially be These views will be change in their view some of Visitor Attractions - There may be available at these points. screened in part by which will have views of the views of the towers at the head of the intervening proposed overhead line. upland valley as seen from the outdoor vegetation. However, the nature of the centre at Plas y drain, 1800m to the proposed overhead line, north-east. The distance of the combined with the screening sites from the effects of landform and Recreational Resource - No recreational A483, the local vegetation, mean that its effect resources have been identified that landform, and will be limited, and no views would be affected by 2b. intervening would create effects on vegetation, reduces residential amenity to the visibility from the extent that they would become road. an undesirable place to live.

Recreational Users of local public rights of Resource - There is way and open access areas will a relatively dense be variably affected. Where a network of public pole is seen in close proximity rights of way in the to these areas (e.g. the public vicinity of the site; forest, footpaths and local two local public access roads near Bryn-picca), footpaths cross the the effect on visual amenity will site but these can be significant, although this be diverted to an effect will diminish rapidly with existing track distance. Similarly, road users around the site. will be variably affected. There would be Significant residual effects are views to the site noted for the A483 and B4355, from the adjacent although these effects would be public footpaths localised and transient. and others in the vicinity; however use of the footpaths does not appear to be high. Environmental Proposed Grid Connection Topics 2 x 132 kV circuits (2 x HDWP or an L4 tower line) to Legacy from SSA B, plus a 132 kV circuit between SSA B and SSA C, plus Llandinam connection to Welshpool SSA C Windfarms to SP Manweb Llandinam Route to SSA B Windfarms to Substation at Proposed National Grid 400kV 2 x 132kV HDWP Summary of Effects Llandinam Route and Collector Welshpool Cefn Coch Substation - Cefn Coch circuits from Substation at Cefn Coch Substation: (Route Options BNC 3, BNC 4, BNC 5: (Preferred Substation Location NW Substation at Cefn (Route Options CC1, CC2, CC3 Option A Line Route Sections 1 - 2b) at Cefn Coch) Coch (SSA B) to and CC4: Line Route Sections 1- Legacy 2a-3-4b-5-6a-7a-8-9a-10) Lighting Not included in Reference 1. Not included in Llandinam Route to Not included in Reference 1. Not included in Reference 4. No environmental This topic has not been included Reference 1. Welshpool (Chapter 11 of information available. in the environmental Ref. 2) assessments or reports for the No significant environmental routes included in this scenario. effects are anticipated on lighting. On this basis, the decision was made to not make this topic the subject of a detailed environmental impact assessment. Noise and As no line route option is As no line route Llandinam Route to As no line route option is considered to Preferred Substation Location No environmental It is not possible to draw Vibration considered to have a greater or option is considered Welshpool (Chapter 11 of have a greater or lesser effect in NW (Section 10.2 of Ref. 3) information available. conclusions from the lesser effect in respect of this to have a greater or Ref. 2) respect of this topic at this scale, this The nearest dwelling to the site is environmental information topic at this scale, this topic has lesser effect in No significant environmental topic has not been included as it does approx 950m to the northeast. available, as all of the routes not been included as it does not respect of this topic effects are anticipated for not assist in identifying a line route Rating levels below existing have not considered this topic. assist in identifying a line route at this scale, this noise. On this basis, the with least environmental effect. This background levels are achievable with least environmental effect. topic has not been decision was made to not make topic will be considered at the EIA with standard noise mitigation This topic will be considered at included as it does this topic the subject of a stage. (page 48 of Ref. 1) solutions. the EIA stage. (page 48 of Ref. not assist in detailed environmental impact 1) identifying a line assessment. This is because of route with least the low intensity of environmental construction activities, the very effect. This topic low volume of vehicle will be considered movements which construction at the EIA stage. of the proposed overhead line (page 48 of Ref. 1) would generate, the short-term (days rather than weeks) and reversible activities at each wood pole structure, and the proven methods of noise control at construction sites.

As a series of small streams drain the site area, there is a potentially low risk for minor effect to both the surface water flows and quality, with the proposed substation potentially affecting both ground water recharge and surface run-off characteristics within the site area.

Technical CC1, CC2, CC3 and CC4: Line SP Manweb Not covered in Reference 2. BNC 3, 4 and 5 - line route section Preferred Substation Location No environmental This information is not applicable Review Route Sections 1-2a-3-4b-5- Collector 1 (page 88 of Ref. 1) NW (Section 10.2 of Ref. 3) information available. to the summary of effects as it 6a-7a-8-9a-10 (Appendix 6.1 Substation: Existing and Proposed OHL The site sits within a shallow valley has been included for reference of Ref. 1) Option A (Tables Infrastructure 33kV and 132kV - This with ground levels rising steeply only. Existing and Proposed OHL 6.4 and 6.5 of route would be crossed by the Nant y towards the southern part of the Infrastructure 33kV and 132kV - Ref. 1) Moch Wind Farm OHL route. site. To create a development This route would cross existing This site could plateau, some earthworks will be 33kV OHL at certain line route accommodate the Existing and Proposed Wind Turbines - required. Earthworks should be sections, however, this could be required The route passes within proximity of a easier in Glacial soils than, although undergrounded. equipment. number of turbines, however the the thickness of these is unknown. required distance from turbines can be If required, cutting operations Existing and Proposed Wind maintained during the detailed design through sandstone bedrock will Turbines - Line route section 1 stage. likely necessitate the use of passes within proximity of hydraulic breakers or blasting. turbines; however it will be Altitude and Topography - The route possible to maintain the would start at a height of 340m, A watercourse runs through the required distance. Line route reducing to 260m at the Afon Gam centre of the site from West to East sections 9a and 10 also pass before increasing in height to 380m. and will need diverting using surface within proximity of turbines but Gradients would be 0-150. ditches. it may not be possible to maintain the required distance BNC 3, 4 and 5 - line route section for line route section 9a. 2b (page 88 of Ref. 1) Existing and Proposed OHL Altitude and Topography - The Infrastructure 33kV and 132kV - This altitude and topography varies route would be crossed by the Nant y throughout the route, as Moch OHL route. demonstrated from the examples detailed below: Existing and Proposed Wind Turbines - The route passes within proximity of a Line route section 1: The number of potential turbines, and it eastern end of this route would may not be possible to maintain the cover altitudes of up to 455m at required distance at the eastern end. the substation at Llanbadarn Fynydd. Moving west, the land Altitude and Topography - The land height is 373m at the Neuadd height increases from 360m to 410m Goch substation. As the line before reducing to 370m at the moves south-west, land heights substation. Gradients are between 0- increase to around 420m at 150. Llaithddu and then higher to around 550m at Hirddywel. Gradients range between 0-15°. As the line passes west of Hirddywel, there is a section of land with a gradient of between 15-22°. The height of land then Environmental Proposed Grid Connection Topics 2 x 132 kV circuits (2 x HDWP or an L4 tower line) to Legacy from SSA B, plus a 132 kV circuit between SSA B and SSA C, plus Llandinam connection to Welshpool SSA C Windfarms to SP Manweb Llandinam Route to SSA B Windfarms to Substation at Proposed National Grid 400kV 2 x 132kV HDWP Summary of Effects Llandinam Route and Collector Welshpool Cefn Coch Substation - Cefn Coch circuits from Substation at Cefn Coch Substation: (Route Options BNC 3, BNC 4, BNC 5: (Preferred Substation Location NW Substation at Cefn (Route Options CC1, CC2, CC3 Option A Line Route Sections 1 - 2b) at Cefn Coch) Coch (SSA B) to and CC4: Line Route Sections 1- Legacy 2a-3-4b-5-6a-7a-8-9a-10) reduces to around 320m as the route moves west before turning north.

Line route section 5 : Route 5 runs north-south over land heights between 170 – 300m. The northern section crosses gradients of between 15 -220.

Line route section 9a : The southern section of 9a crosses a section of land with a gradient of 15 to 220. As it moves north, land heights range from 420m to 370m before increasing again to 440m.

References (Ref.):

(1) SP MANWEB (Sept 2013). SP Mid Wales Connections, Line Routing Methodology & Appraisal - Phase 3 Report.

(2) SP MANWEB (Oct 2013). Volume 1: New 132kV Overhead Line Connection from Llandinam Wind Farm to Welshpool Substation - Updated Environmental Statement.

(3) National Grid (Sept 2013). Mid Wales Connection Project, Draft Substation Site Report.

(4) National Grid (Sept 2013). Mid Wales Connection Project, Draft Route Report.

Table J: Scenario 8b - National Grid 400kv circuit to Lower Frankton from National Grid 400kV substation at Cefn Coch, plus a 132 kV circuit between SSA B and SSA C, plus Llandinam connection to Welshpool

Environmental Proposed Grid Connection Topics National Grid 400kv circuit to Lower Frankton from National Grid 400kV substation at Cefn Coch, plus a 132 kV circuit between SSA B and SSA C, plus Llandinam connection SSA C Windfarms to SP Manweb Llandinam Route to SSA B Windfarms to Proposed National Grid 400kV Preferred National Grid 400kV Line Summary of Effects Llandinam Route and Collector Welshpool Substation at Cefn Coch Substation - Cefn Coch (Connected from National Grid Preferred Substation Substation at Cefn Substation: (Route Options BNC 3, (Preferred Substation Location NW at Cefn Location NW at Cefn Coch to Grid Supply Point at Coch Option A BNC 4, BNC 5: Line Route Coch) Lower Frankton) (Route Options CC1, Sections 1 - 2b) CC2, CC3 and CC4: Line Route Sections 1-2a-3- 4b-5-6a-7a-8-9a-10) Air Quality As no line route option is As no line route Not covered in As no line route option is Preferred Substation Location NW Not included in Reference 4. It is not possible to draw and Emissions considered to have a option is Reference 2. considered to have a (Section 10.2 of Ref. 3) conclusions from the (incl. dust) greater or lesser effect in considered to have greater or lesser effect in The site is more than 1km northwest of environmental information respect of this topic at a greater or lesser respect of this topic at this Tan-y-Foel Quarry and therefore unlikely available, as all of the this scale, this topic has effect in respect of scale, this topic has not to be routes have not considered not been included as it this topic at this been included as it does significantly affected by dust from quarry. this topic. does not assist in scale, this topic not assist in identifying a identifying a line route has not been line route with least with least environmental included as it does environmental effect. This effect. This topic will be not assist in topic will be considered at considered at the EIA identifying a line the EIA stage. (page 48 of stage. (page 48 of Ref. route with least Ref. 1) 1) environmental effect. This topic will be considered at the EIA stage. (page 48 of Ref. 1) Ecology/Biodi CC1, CC2, CC3 and SP Manweb Llandinam Route to BNC 3, 4 and 5 - line Preferred Substation Location NW Route Section - Cefn Coch to Afon Banwy Birds: There are a number versity and CC4: Line Route Collector Welshpool (Chapter route section 1 (page (Section 10.2 of Ref. 3) (Chapter 12 of Ref. 4) of ornithological 'hot-spots' Geological Sections 1-2a-3-4b-5- Substation: 7 of Ref. 2) 87 of Ref. 1) This site is primarily located within an Ecological features within the area include peat in proximity to the Conservation 6a-7a-8-9a-10 Option A (Tables It is considered that the Wind farm Habitat area of semi-improved grassland with low deposits, ancient woodland, hedgerows and other proposed routes, whereby (Appendix 6.1 of Ref. 6.4 and 6.5 of proposed overhead line Management Plan Area species diversity. Areas of valuable habitat semi-natural habitats. The peatland areas to the there is potential for larger 1) Ref. 1) is not likely to result in (HMP) - The route passes do occur to the north east of the site and west of Cefn Coch include valuable habitat and species, (such as swans) Wind farm Habitat SAC - The River any significant adverse through the Llanbrynmair are represented by wetland/peatland associated species. Natural Resources Wales to collide with overhead Management Plan Area Wye SAC long-term effects. If Wind Farm HMP At its very habitats along a stream valley, therefore (formerly Countryside Council for Wales) have lines which presents a (HMP) - Line route headwaters lie the mitigation eastern extent, the route indirect hydrological effects are a previously raised the issue of potential effects on long-term permanent sections 1, and 6a-10 0.75km to the measures discussed in borders provisional areas consideration in this area. peat in this area. Designated sites requiring hazard to birds, however pass through and/or are south east of the Chapter 7 (Ref. 2) are set out for the Tirgwynt consideration are the Elenydd – Mallaen Special the use of bird deflectors is within 2km of HMP areas site with fully implemented any HMP. Consideration of ornithological effects is Protection Area (SPA) - located c.12km to the likely to reduce this risk. for Hirddywell Wind Farm associated risk of adverse effects also required given proximity to habitats north-west There is also a concern and the Tirgwynt HMP freshwater will be further reduced. Peatland Habitats - The of bird value noted in Tirgwynt EIA (e.g. that the movements and area. sensitivities. route passes through nesting curlew). There is a concern that Route Section - Meifod Valley (Chapter 14 of noises associated with the The potential for potential peat habitat to the movements and noises associated Ref. 4) construction of the NG Protected Species - The SSSI - The site lies collisions with overhead the south and east of with the construction of the substation Local habitats support a range of fauna and flora substation may have a route passes through and less than 1km from lines is probably the Llanbrynmair Wind Farm, may have a detrimental effect upon the including legally protected species. Otter are detrimental effect upon passes within 730m to Gweunydd most significant effect along the northern curlews and other breeding bird that nest present along the River Vyrnwy. The nearby Tanat birds that nest nearby. 2km of many potential Camnant SSSI, likely to arise. This boundary of the woodland. nearby. However, the EIA for the and Vyrnwy Bat SAC is designated for the lesser protected species designated for represents a long-term, consented Tirgwynt wind farm did not horseshoe bat. Other desginated sites along the Designated Sites: The hotspots. habitats, the River permanent hazard to Ornithological ‘Hot Spots’ - identify this as a significant impact. route included the Elenydd - Mallaen SPA (c. 12km Montgomery / Shropshire Ithon SSSI and the certain groups of birds, There are no ornithological to th north-west) and the Main Oxbow CWS. Union Canal SAC and Peatland Habitats - Line Esgairdraenllwyn primarily the larger hotspots associated with Due to the location of the substation site it Montgomery Canal SSSI route sections 1 passes Pastures SSSI, species such as swans the route; however the is highly likely that the site, and the Route Section - Waen-Fach to A483 (Chapter are crossed by the 400kV through two large areas designated for and to a lesser extent Foel Quarry hotspot is indicative incoming connections and 15 of Ref. 4) preferred route corridor. of potential peat. It also habitats. the smaller wildfowl. approximately 360m to the potentially the outgoing National Grid Much of the area comprises arable land or species No other designated sites passes through areas However, the erection south. route associated with the site, will affect poor grassland, however mature trees, hedgerows, are likely to be directly identified in of bird deflectors in valuable ecological features such as small scattered pockets of woodland and ponds are affected by the proposed Environmental appropriate locations BNC 3, 4 and 5 - line peatland and/or ornithology. also present. The nearby Tanat and Vyrnwy Bat grid connections, however Statements as supporting will reduce the risk of route section 2b (page SAC is designated for the lesser horseshoe bat. The there are a number of peat habitats. birds colliding with the 87 of Ref. 1) Montgomery / Shropshire Union Canal is an SAC designated sites which lie overhead line, and the Wind farm Habitat (water plantain) and is crossed by the preferred in close proximity to the Ornithological ‘Hot Spots’ erection of devices to Management Plan Area route corridor. routes. Environmental Proposed Grid Connection Topics National Grid 400kv circuit to Lower Frankton from National Grid 400kV substation at Cefn Coch, plus a 132 kV circuit between SSA B and SSA C, plus Llandinam connection SSA C Windfarms to SP Manweb Llandinam Route to SSA B Windfarms to Proposed National Grid 400kV Preferred National Grid 400kV Line Summary of Effects Llandinam Route and Collector Welshpool Substation at Cefn Coch Substation - Cefn Coch (Connected from National Grid Preferred Substation Substation at Cefn Substation: (Route Options BNC 3, (Preferred Substation Location NW at Cefn Location NW at Cefn Coch to Grid Supply Point at Coch Option A BNC 4, BNC 5: Line Route Coch) Lower Frankton) (Route Options CC1, Sections 1 - 2b) CC2, CC3 and CC4: Line Route Sections 1-2a-3- 4b-5-6a-7a-8-9a-10) - The route passes discourage or prevent (HMP) - Approx. 700m of through and within 300m roosting on wood pole the route passes through Route Section - A483 to Woolston (Chapter 16 Habitat Management to 1.1km of many hot supports will reduce the provisional areas set out of Ref. 4) Plans: Due to the location spots, including the risk of predation on for the Tirgwynt HMP. Much of the area comprises arable land; however of the wind farm Tylwch tip hotspot (to ground nesting birds. mature trees, hedgerows, small scattered pockets substations the routes will the south of the route) Peatland Habitats - No of woodland and ponds are also present. The pass through a number of and Bwlch y Garreg (to potential peat areas were Montgomery Canal is an SAC (water plantain) and wind farm HMP areas. the north of the route). identified within the route. is crossed by the preferred route corridor. The Morton Pool and Pasture Ramsar site forms part of Protected Species: Sites Designated for Ornithological ‘Hot Spots’ - the Midland Meres and Mosses Phase 2 Ramsar Protected species are likely Nature Conservation Approximately 450m of sites. Due to the nature of habitats present, this to be located in proximity Importance (SPA, SAC, the route passes through section is not considered to be of high value for to the routes. However full SSSI) - The route does the Foel Quarry collision risk bird species and ground nesting bird compliance with relevant not pass through any ornithological hotspot. species including waders. protected species statutory designated legislation is likely to help sites; however several Route Section - Woolston to Lower Frankton to minimise any effects. designated areas are (Chapter 17 of Ref. 4) within a 2km radius, Much of the area comprises arable land or species Peatland Habitats: A including the River Wye poor grassland; however mature trees, hedgerows, number of the routes pass SAC and the Llan Mawr small scattered pockets of woodland and ponds are through areas of potential SSSI. The closest site is also present. The Montgomery Canal is an SSSI peatland habitat. the Gweunydd Camnant (water plantain) and is crossed by the preferred SSSI, approx. 55m to the route corridor near Bromwich Park. The nearby north of line route Morton Pool and Pasture Ramsar site forms part of section 1. the Midland Meres and Mosses Phase 2 Ramsar sites, and lie approximately 1km to the west of the route corridor. Due to the nature of habitats present, this section of the preferred route corridor is not considered to be of high value for collision risk bird species and ground nesting bird species including waders. Climate As no line route option is As no line route Not covered in As no line route option is Not included in Reference 3. Not included in Reference 4. This topic has not been Change considered to have a option is Reference 2. considered to have a included in the greater or lesser effect in considered to have greater or lesser effect in environmental respect of this topic at a greater or lesser respect of this topic at this assessments or reports for this scale, this topic has effect in respect of scale, this topic has not the routes included in this not been included as it this topic at this been included as it does scenario. does not assist in scale, this topic not assist in identifying a identifying a line route has not been line route with least with least environmental included as it does environmental effect. This effect. This topic will be not assist in topic will be considered at considered at the EIA identifying a line the EIA stage. (page 48 of stage. (page 48 of Ref. route with least Ref. 1) 1) environmental effect. This topic will be considered at the EIA stage. (page 48 of Ref. 1) Environmental Proposed Grid Connection Topics National Grid 400kv circuit to Lower Frankton from National Grid 400kV substation at Cefn Coch, plus a 132 kV circuit between SSA B and SSA C, plus Llandinam connection SSA C Windfarms to SP Manweb Llandinam Route to SSA B Windfarms to Proposed National Grid 400kV Preferred National Grid 400kV Line Summary of Effects Llandinam Route and Collector Welshpool Substation at Cefn Coch Substation - Cefn Coch (Connected from National Grid Preferred Substation Substation at Cefn Substation: (Route Options BNC 3, (Preferred Substation Location NW at Cefn Location NW at Cefn Coch to Grid Supply Point at Coch Option A BNC 4, BNC 5: Line Route Coch) Lower Frankton) (Route Options CC1, Sections 1 - 2b) CC2, CC3 and CC4: Line Route Sections 1-2a-3- 4b-5-6a-7a-8-9a-10) Electric and As no line route option is As no line route Llandinam Route to As no line route option is Not included in Reference 3. Not included in Reference 4. This topic has not been Magnetic considered to have a option is Welshpool (Chapter considered to have a included in the Fields greater or lesser effect in considered to have 11 of Ref. 2) greater or lesser effect in environmental respect of this topic at a greater or lesser No significant respect of this topic at this assessments or reports for this scale, this topic has effect in respect of environmental effects scale, this topic has not the routes included in this not been included as it this topic at this are anticipated on been included as it does scenario. does not assist in scale, this topic electric and magnetic not assist in identifying a identifying a line route has not been fields. On this basis, line route with least with least environmental included as it does the decision was made environmental effect. This effect. This topic will be not assist in to not make this topic topic will be considered at considered at the EIA identifying a line the subject of a the EIA stage. (page 48 of stage. (page 48 of Ref. route with least detailed environmental Ref. 1) 1) environmental impact assessment. effect. This topic will be considered at the EIA stage. (page 48 of Ref. 1) Forestry and CC1, CC2, CC3 and SP Manweb Llandinam Route to BNC 3, 4 and 5 - line Not included in Reference 3. Not included in Reference 4. Some trees and hedgerows Woodland CC4: Line Route Collector Welshpool (Chapter route section 1 (page will be lost to facilitate Sections 1-2a-3-4b-5- Substation: 7 of Ref. 2) 87 of Ref. 1) construction of the grid 6a-7a-8-9a-10 Option A (Tables It is considered that the Other Forestry and connection routes. The (Appendix 6.1 of Ref. 6.4 and 6.5 of proposed overhead line Woodland - Route 1 will loss of trees may result in 1) Ref. 1) is not likely to result in pass through c.320m of potential habitat loss for Ancient and Semi-Natural Other Forestry and any significant adverse mature coniferous bats, although this is woodland (ASNW) - Line Woodland - There long-term effects. If plantation above Nant y expected to be a localised route sections 1, 4b, and are a number of the mitigation Graig Lwyd, and c.730m of effect. 6a will affect areas of small blocks of measures discussed in mature coniferous ASNW, this will be forestry and Chapter 7 (Ref. 2) are plantation at Cors yr In some locations, mature avoided, where possible, shelter belt fully implemented any Ebolion. Native trees along trees as well as Ancient at detailed design stage. planting located risk of adverse effects the Nant y Graig Lwyd and Semi-Natural Line route sections 2a, 3, within the vicinity will be further reduced. may be affected by the woodland may be affected 4b, 7a and 8 affect areas of the substation lines. by construction of the of ASNW and limited site which will Some trees will be lost proposed routes. Although felling may be required. screen and to facilitate construction BNC 3, 4 and 5 - line this will be avoided where backdrop the of the Amended route section 2b (page possible at the detailed proposed Development, including 87 of Ref. 1) design stage, limited Other Forestry and substation. The trees that may have Other Forestry and felling may be required in Woodland - All line route site will not require potential for bats. This Woodland - 2b may affect some locations. sections cross some any felling of tree loss may result in small stands of woodland fields where limited existing plantation potential habitat loss south-west of the NG hub. felling of hedgerow trees, woodland. for bats. and in some cases (e.g. line route sections 1 and 3) woodland edge trees. Line route section 9a passes through 5.9ha of woodland on the Welsh National Forest Inventory although no mature trees would be felled. Geology and Not included in Reference Not included in Llandinam Route to Not included in Reference Not included in Reference 3. Not included in Reference 4. This topic has not been Soils 3. Reference 3. Welshpool (Chapter 1. included in the 11 of Ref. 2) environmental No significant assessments or reports for environmental effects the routes included in this Environmental Proposed Grid Connection Topics National Grid 400kv circuit to Lower Frankton from National Grid 400kV substation at Cefn Coch, plus a 132 kV circuit between SSA B and SSA C, plus Llandinam connection SSA C Windfarms to SP Manweb Llandinam Route to SSA B Windfarms to Proposed National Grid 400kV Preferred National Grid 400kV Line Summary of Effects Llandinam Route and Collector Welshpool Substation at Cefn Coch Substation - Cefn Coch (Connected from National Grid Preferred Substation Substation at Cefn Substation: (Route Options BNC 3, (Preferred Substation Location NW at Cefn Location NW at Cefn Coch to Grid Supply Point at Coch Option A BNC 4, BNC 5: Line Route Coch) Lower Frankton) (Route Options CC1, Sections 1 - 2b) CC2, CC3 and CC4: Line Route Sections 1-2a-3- 4b-5-6a-7a-8-9a-10) are anticipated on scenario. geology or soil resources. On this basis, the decision was made to not make this topic the subject of a detailed environmental impact assessment. Historic CC1, CC2, CC3 and SP Manweb Llandinam Route to BNC 3, 4 and 5 - line Preferred Substation Location NW Route Section - Cefn Coch to Afon Banwy Two designated features Environment CC4: Line Route Collector Welshpool (Chapter route section 1 (page (Section 10.2 of Ref. 3) (Chapter 12 of Ref. 4) (SAMs) are located within Sections 1-2a-3-4b-5- Substation: 8 of Ref. 2) 87 of Ref. 1) The site is located in an area where there The head of the valley and upland plateau has a the Llandinam route and 6a-7a-8-9a-10 Option A (Tables The proposed overhead SAMs - There is 1 SAM are no key local receptors, but it is located number of scheduled ancient monuments and their one within the SP MWC (Appendix 6.1 of Ref. 6.4 and 6.5 of line from the Llandinam within the route but none roughly equidistant between a scheduled situation in the surrounding landscape is important BNC route. There are also 1) Ref. 1) Repowering Wind Farm within 2km. Kerb Cairn (WSM MG 327), a scheduled to their designation. Listed buildings exist in low multiple SAMs located SAMs - The northen area Undesignated to the Welshpool Grid stone circle (WSM MG 179), and a root numbers within the area, and all are of the lowest within the 400kV preferred of the route contains Archaeology - An Substation, some 35 The proximity of the store (WSM MG 218). These sites are grade (II) and consideration is required of their route. The Llandinam more SAMs that are undesignated site km long, adopts a scheduled Bon-y-maen situated approximately 2km away from immediate setting. Route and other routes within 2km of the route. of historical course to the south and root store and on the farm the substation, and outside of any included in this scenario For example, no SAMs interest (a single east of the Severn of which it forms a part identified areas of theoretical visibility. Route Section - Meifod Valley (Chapter 14 of pass within 1-2km of other are located within line storey derelict Valley which takes it will form a key However, whilst the substation site will Ref. 4) historic assets, including: route section 1 but 24 stone building) lies past and through some consideration for the not be visible from any of these The area is very important in cultural heritage SAMs, Conservation Areas, SAMs lie in 14 groups immediately of the richest cultural detailed line design stage monuments, the proposed overhead line is terms and is particularly noted for its hillforts Listed Buildings (primarily within 2km of the route adjacent to the site heritage landscapes in and effects on its setting potentially visible from the root store and around Pentre-uchaf and Mathrafal. The valley is lower grade II but also and line route sections to the northeast. mid Wales. will form a key may have a slightly adverse effect upon also likely to contain many undiscovered sites. including higher grade), 2a-5 have no SAMs consideration during the its landscape context. Several higher grade listed buildings are located historic landscapes, within 2km of the route. There are 55 SAMs EIA stage. around Meifod and there is a further one at Colwyn. Registered Historic Parks Whereas line route located within 2km of An undesignated group of pillow mounds Immediate setting is significant to their designation and Gardens and sections 6a-10 all have the overhead line, two Listed Buildings (LBs) - (WNMR 9448) of regional importance is and hence they require consideration in the undesignated below- SAMs located within 2km of them (Crugyn Bank There are no LBs within located to the south east. Whilst the routeing process. The Meifod Conservation Area is ground sites/features. of the route. Dyke and Bryn the route section. There substation site will not be visible, the also location within this route section. The Meifod Mitigation measures will be Cwmyrhiwdre Round are 2 LBs within 2km of it, proposed overhead lines into and out of Valley is also expected to contain many deployed to minimise Virtually all the SAMs are Barrow) within the both of lower grade II. the substation, are potentially visible and undiscovered sites. direct effects on features, prehistoric burial and 100m wide corridor. may have a slightly adverse effects upon however significant effects ritual monuments, some There are also 452 Undesignated Archaeology their landscape context. Route Section - Waen-Fach to A483 (Chapter on the setting of a number with wide-ranging views, Listed Buildings, five - There are 2 undesignated 15 of Ref. 4) of features are predicted. others are rare Registered Historic archaeological features in This section of the preferred route corridor is rich in prehistoric house sites. Parks and Gardens, the route section. Direct cultural heritage features and includes nine Only the Llandinam route seven Conservation effects will be avoided, Scheduled Monuments, four prehistoric hillforts one passes through a Listed Buildings (LBs) - Areas, and one of where possible, during of which (Llanymynech) is substantial, and a Registered Historic All line route sections, Wales’ Registered detailed design. Roman settlement near Colfryn and a Roman camp Landscape resulting in apart from 9a and 10 are Historic Landscapes located at Llansantffraid-ym-Mechain, and Offa’s significant effects. within 2km of LBs, the would be crossed by BNC 3, 4 and 5 - line Dyke Scheduled Monument. There are majority of which are the proposed overhead route section 2b (page Conservation Areas at Llansantffraid-ym-Mechain lower grade II. However, line. 87 of Ref. 1) and Llanymynech both of which have views up and some line route sections SAMs - There are no SAMs down the valley. Also, there are several hillforts on (e.g. 5) have LBs of It is the heritage assets within the route but two both sides of the valley which are not scheduled, higher grade II* within the 100 m wide within 2km, the Bon-y- and undesignated below-ground site that require desginated status. LBs corridor that are most maen root store and Y careful consideration during later stages. that are within close at risk from the Capel stone circle. proximity (i.e. 150m) of proposed overhead line Route Section - A483 to Woolston (Chapter 16 the route such as and could be adversely Listed Buildings (LBs) - of Ref. 4) Ystradfaelog which is the affected by its There are no Listed A number of important cultural heritage features higher grade II* building construction. Most of Buildings within 2km of the relate to Llanymynech Hill and the area around along line route section these are considered to route section. Llanymynech (such as two scheduled monuments) 5, could be the possibility be of low (local) or and Four Crosses and as outlined in the previous Environmental Proposed Grid Connection Topics National Grid 400kv circuit to Lower Frankton from National Grid 400kV substation at Cefn Coch, plus a 132 kV circuit between SSA B and SSA C, plus Llandinam connection SSA C Windfarms to SP Manweb Llandinam Route to SSA B Windfarms to Proposed National Grid 400kV Preferred National Grid 400kV Line Summary of Effects Llandinam Route and Collector Welshpool Substation at Cefn Coch Substation - Cefn Coch (Connected from National Grid Preferred Substation Substation at Cefn Substation: (Route Options BNC 3, (Preferred Substation Location NW at Cefn Location NW at Cefn Coch to Grid Supply Point at Coch Option A BNC 4, BNC 5: Line Route Coch) Lower Frankton) (Route Options CC1, Sections 1 - 2b) CC2, CC3 and CC4: Line Route Sections 1-2a-3- 4b-5-6a-7a-8-9a-10) of visual impact. even negligible value, Undesignated Archaeology route section relating to the Vyrnwy Valley between but there are some of - There are no Waen-fach and the A483, such as Offa's Dyke a Conservation Areas - medium (regional) undesignated scheduled monoument. In addition, the low lying Only line route section 3 significance, as well as archaeological features in farmland contains a very large number of is located within 2km of a the few of high the route section. undesignated below-ground sites which have been Conservation Area, which (national) importance. identified from aerial photographs. The is Llanidloes Appropriate mitigation Llanymynech Conservation Area has views up and Conservation Area. (e.g. preservation in down the valley. There are also a large number of situ, preservation by undesignated below-ground sites which may be of Registered Historic record, excavation, regional importance, and the likelihood of Landscapes (RHLs) - Line evaluation, watching undiscovered sites. route sections 2a, 3, 5 brief) including the and 6a are within 1-2km careful demarcation of Route Section - Woolston to Lower Frankton of Clywedog Valley RHL assets is suggested (Chapter 17 of Ref. 4) and/or Caersws Basin which should ensure There are a number of important cultural heritage RHL. that damage is kept to features including six scheduled monuments, one of a minimum during the which is Bromwich Park which lies within the Undesignated erection of the preferred route corridor. Two higher grade listed Archaeology - supports. buildings are recorded in this section. These include Undesignated a holy well at Woolston and the church at West archaeological features Assuming that a full Felton. In addition there are the historic (but not are located along most suite of mitigation designated) halls and parklands and many line route sections. Direct measures is undesignated below-ground sites which have been effects will be avoided, successfully identified from aerial photographs. where possible, during implemented, the detailed design. proposed overhead line should not have any significant long-term effect on the cultural heritage. In particular, there are no likely significant direct effects on cultural heritage arising during the construction, operation or decommissioning of the proposed overhead line.

Land Use CC1, CC2, CC3 and No environmental Not covered in BNC 3, 4 and 5 - line Not included in Reference 4. Route Section - Cefn Coch to Afon Banwy It is not possible to draw CC4: Line Route information was Reference 2. route section 1 (pages (Chapter 12 of Ref. 4) conclusions from the Sections 1-2a-3-4b-5- covered for this 87 and 88 of Ref. 1) Land use in this area is primarily agricultural. There environmental information 6a-7a-8-9a-10 topic. Open space and Green are also areas of Open Access Land and Common available, as all of the (Appendix 6.1 of Ref. Infrastructure - Route 1 Land. There are a number of Powys County Council routes have not considered 1) routes across Candidate Sites (potential allocations) the majority this topic. Open space and Green approximately 1,766m of of which are proposed for residential development. Infrastructure - Line open access land. These are located within c.0.5km of settlement route section 1 crosses boundaries at Cefn Coch, Adfa, Llanerfyl and one area of Open BNC 3, 4 and 5 - line Llanfair Caereinion. Country access and lies route section 2b (pages within 1km of one other, 87 and 88 of Ref. 1) Route Section - Meifod Valley (Chapter 14 of and within 1km of two Open space and Green Ref. 4) areas of Registered Infrastructure - 2b routes Land use in this area is principally for agriculture. Common Land. across approximately There are a number of Powys County Council 694m of open access land. Candidate Sites (potential allocations) within the vicinity; the majority of which are proposed for residential development. These are primarily located within c.0.5km of settlement boundaries including at Meifod and Trefnanney.

Route Section - Waen-Fach to A483 (Chapter 15 of Ref. 4) Land use within this area is predominantly agricultural. BMV agricultural land extends within Environmental Proposed Grid Connection Topics National Grid 400kv circuit to Lower Frankton from National Grid 400kV substation at Cefn Coch, plus a 132 kV circuit between SSA B and SSA C, plus Llandinam connection SSA C Windfarms to SP Manweb Llandinam Route to SSA B Windfarms to Proposed National Grid 400kV Preferred National Grid 400kV Line Summary of Effects Llandinam Route and Collector Welshpool Substation at Cefn Coch Substation - Cefn Coch (Connected from National Grid Preferred Substation Substation at Cefn Substation: (Route Options BNC 3, (Preferred Substation Location NW at Cefn Location NW at Cefn Coch to Grid Supply Point at Coch Option A BNC 4, BNC 5: Line Route Coch) Lower Frankton) (Route Options CC1, Sections 1 - 2b) CC2, CC3 and CC4: Line Route Sections 1-2a-3- 4b-5-6a-7a-8-9a-10) and to the north of the preferred route corridor near Wern. There are a number of planning designations associated with the settlements, including the Llanymynech Conservation Area. Powys County Council Candidate Sites (potential allocations) are primarily associated with settlements including Llansantffraid, Waen, Wern and Llanymynech.

Route Section - A483 to Woolston (Chapter 16 of Ref. 4) Land use in this area is primary agricultural. Agricultural land classification Grades 1 and 2 covers the majority of the preferred route corridor between Morton and Woolston. Shropshire Council’s ‘Site Allocations and Management of Development (SAMDev) Plan’ which includes a number of Preferred Sites. These may be adopted into the future Local Development Framework, i.e. are potential allocations. A number of these sites are located within community hubs near Pant and at Knockin.

Route Section - Woolston to Lower Frankton (Chapter 17 of Ref. 4) Land use in this area is primarily agricultural. Agricultural land classification Grades 1 and 2 is located within the preferred route corridor in two large pockets. The first of these is located near Maesbury Marsh and extends north-west from this village to outside the preferred route corridor. The second area extends across approximately the entire preferred route corridor at its eastern end. Other land uses include a golf course and several parks and gardens used as event venues.

The settlements include Woolston, Maesbury Marsh, Maesbury, West Felton, Twyford, Queen’s Head, Wootton, Babbinswood, Whittington, Lower Frankton and Welsh Frankton. Shropshire Council’s ‘Site Allocations and Management of Development (SAMDev) Plan’ which includes a number of Preferred Sites within the vicinity, and which may be adopted into the future Local Development Framework, i.e. are potential allocations. These sites are located within community cluster settlements of Babbinswood and Lower Frankton. Environmental Proposed Grid Connection Topics National Grid 400kv circuit to Lower Frankton from National Grid 400kV substation at Cefn Coch, plus a 132 kV circuit between SSA B and SSA C, plus Llandinam connection SSA C Windfarms to SP Manweb Llandinam Route to SSA B Windfarms to Proposed National Grid 400kV Preferred National Grid 400kV Line Summary of Effects Llandinam Route and Collector Welshpool Substation at Cefn Coch Substation - Cefn Coch (Connected from National Grid Preferred Substation Substation at Cefn Substation: (Route Options BNC 3, (Preferred Substation Location NW at Cefn Location NW at Cefn Coch to Grid Supply Point at Coch Option A BNC 4, BNC 5: Line Route Coch) Lower Frankton) (Route Options CC1, Sections 1 - 2b) CC2, CC3 and CC4: Line Route Sections 1-2a-3- 4b-5-6a-7a-8-9a-10) Landscape CC1, CC2, CC3 and SP Manweb Llandinam Route to BNC 3, 4 and 5 - line Preferred Substation Location NW Route Section - Cefn Coch to Afon Banwy Landscape and visual and CC4: Line Route Collector Welshpool (Chapter route section 1 (page (Section 10.2 of Ref. 3) (Chapter 12 of Ref. 4) effects are likely to arise Visual Sections 1-2a-3-4b-5- Substation: 6 of Ref. 2) 87 of Ref. 1) Whilst currently a substation in this The landform around the Cefn Coch substation along the routes of this Amenity 6a-7a-8-9a-10 Option A (Tables Any likely significant Landscape Sensitivity - remote rural location would represent a siting area is an upland plateau situated around scenario, however the (Appendix 6.1 of Ref. 6.4 and 6.5 of landscape or visual Route 1 descends into the detracting urban element, which would be 415m AOD, which is drained by tributary streams of effects will be localised and 1) Ref. 1) effects would arise small-medium scale valley inconsistent with the local landscape the rivers Rhiw, Einion and Banwy which flow will diminish rapidly with Landscape and visual Landscape during the operational of the Nant y Graig Lwyd. character, this situation is likely to change through well-defined valleys off the plateau edge. distance from the route. amenity varies along the Sensitivity - The stage from the localised It traverses a shoulder of with the construction of the Tirgwynt wind Views are also variable route. Along certain line open pasture loss of trees and the moorland, remaining farm and Mynydd Waen Fawr wind farm (if The plateau is remote and rural with an open depending on localised route sections short landscape lies introduction into the behind the ridge line constructed) as the proposed substation moorland landscape that is typical of upland Wales. topography and tree cover. sections of sky lining will below the higher landscape of where possible. Between would potentially be seen alongside above The elevated landform provides expansive views occur (e.g. line route moorland tops to approximately 35 km of Cwmderwen and Cors yr ground equipment such as overhead across rolling ridgelines, punctuated by geometric Localised significant effects section 2a), and the line the north and east new overhead line on Ebolion it crosses medium electricity lines, pylons and the turbines of blocks of coniferous plantations and occasional have been identified for route sections will be above the A483. wood pole structures. to large-scale upland the Tirgwynt Wind farm and other planned clusters of wind turbines. Prominent landscape visual receptors utilising a visible as they drop down The Ithon valley The design and pasture. It then passes wind farms. The Overall Visual and features include Mynydd Clogau Wind Farm, Tan Y proportion of the into valleys, such as Afon runs to the east of routeing of the across larger-scale Sensory Evaluation (VS50) of the site is Foel Quarry, the Mynydd Waen Fawr ridgeline and footpaths, roads and Trannon Valley. the site but is proposed overhead line moorland plateau, avoiding High. the rounded hill of Foel Fawr. Settlement is either residential properties sited However, some line route relatively shallow has been developed to the highest ground where dispersed along the network of narrow lanes, or close to the routes of this sections are provided at this point. The minimise its effects on possible. The ZTV suggests that a substation in this clustered into small hamlets and the villages of scenario. In some with natural screening in moderate sized the landscape and location may just be visible from Cefn Coch and Adfa, both of which lie within c.5km locations along the 400kV areas by existing pastoral fields are visual amenity of the Visual Sensitivity - The Snowdonia National Park in the high area of the substation sites. Views are variable line preferred route, hedgerow and riparian often contained by area. parallel wood pole lines of Mynydd Clywedog. This would be at a depending on localised topography and tree cover. settlements, including a trees, and line route coniferous shelter may be seen on the distance of 15km and it is likely that the number of large villages sections, such as line belts and larger The location of the skyline above Nant y Graig substation would be imperceptible from Route Section - Meifod Valley (Chapter 14 of are affected. Also, the route section 1, follow woodland blocks, Llandinam wind farm on Lwyd from locations within this distance. Ref. 4) popular viewpoint of the field pattern, using which both the Waun Ddubarthog Nant-yr-Eira. The lines will This section meets and follows the A495 and passes Llanymynech Hill with its field boundaries and introduce man Ridge means that the be backclothed by forestry The ZTV indicates that the site is visually through the narrow and well wooded Yr Hafesb Heritage Trail overlooks shelter belts to screen made elements to route is more visible at on the south side of Nant- well contained due to the surrounding Valley south of Ffridd Mathrafal. Residential this section of the and backdrop the route. the landscape and the southern end of the yr-Eira. Beyond Cors yr landform which provides natural screening receptors in this part of the valley include a few preferred route corridor. break up and corridor, than further Ebolion the plateau has on three sides. Areas of potential visibility properties, the Tanhouse Inn and Tan-y-Ffridd Line route sections, such contain views. north where it merges few inward views and are largely restricted to the sparsely Caravan Park which are all located adjacent to the While the existing 400 kV as 6a, pass through The substation is into the more diverse wood poles are unlikely to populated valley and surrounding hill A495 tourist route which runs through the valley. line is noticeable in relatively open potentially visible and enclosed landscape be seen. slopes to the north-east, including the The combination of large deciduous and coniferous locations along the route it landscapes above the within the east of the Severn lower slopes of Mynydd Waun Fawr, the woodlands on the higher slopes and a high is not a dominant valley floor and will be landscape due to Valley. However, the From the head of Nant Mynydd y Gribin ridgeline and Foel Fawr. prevalence of scrub and individual trees lower down landscape feature, visible in views across its elevation and use of wood pole Wythan, 1 will be carried enclose longer views along and across the valley. particularly towards the valleys, although these the relatively open supports helps mitigate on steel towers. These It is anticipated that there would be The landform of the Meifod Valley is one of its eastern end of the route. views will be back nature of the the effects within the may be visible in longer unrestricted and filtered views of the distinctive features; the steep valley sides providing dropped by wooded upland landscape. more open and views toward the development from Gwaenydd and a strong contrast with the flat, low-lying valley Overall, for the SSAC slopes. Line route section However, the elevated parts of the moorland, e.g. from Cwm potentially from a few other scattered floor. The small villages of Pentre and Meifod are connection to Welshpool, 6a will also be locally sensitivity of this route. Llwyd to the south and properties further afield. There would also situated on the north side of the valley at its effects are more likely for prominent as it runs landscape is from the Banwy valley to be views from the public right of way narrowest point. Elsewhere the settlement pattern landscape and visual around the Allt y Genlli medium-low, and Landscape Effects the north. The towers will network, but no views from the local comprises a dispersed pattern of individual or small receptors located close to hillside above Tanyrallt. there is scope for Although significant or be partially lanes. In those locations where the clusters of properties typically situated on the lower the southern sections of Also,in certain lcoations, extension of the borderline significant, screened/backclothed by proposed substation is likely to be visible, valleys sides. Overall the valley has a high scenic the proposed route. This line route sections pass existing areas of all the effects were forestry at Mynydd Carreg- it would potentially be seen alongside quality with few detracting features. is because this is generally through areas of ancient coniferous planting assessed as minor- y-big in some views. above ground equipment such as a more elevated area with and semi-natural belts which contain moderate or moderate overhead electricity lines, pylons and the Route Section - Waen-Fach to A483 (Chapter lower levels of vegetation woodland and scattered views. The site and none of the effects Residential Visual Amenity turbines of some of the planned wind 15 of Ref. 4) cover consequently there properties. includes a belt of was assessed as major. - The parallel wood pole farms. This section of the draft route primarily comprises would be greater potential existing coniferous The only landscape lines may be viewed from the Vyrnwy Valley as it widens east of Waen-fach visibility for the routes. In Potential visual effects planting on its along the route two properties at The visual effects arising from a and swings around the southern side of comparison, the central are possible for southern edge identified as Cwmderwen, descending substation in this location could be Llansantffraid-ym-Mechain where it is joined by the and northern sections of residential properties, which will both experiencing a from high ground into lessened by perimeter mounding tributary valleys of the Rivers Cain and Tanat. the Llandinam – Welshpool such as Oakley Park, screen, and moderate and therefore Nant-yr-Eira. These supplemented by planting which could Fields are bound by hedgerows and fences and route is routed through Environmental Proposed Grid Connection Topics National Grid 400kv circuit to Lower Frankton from National Grid 400kV substation at Cefn Coch, plus a 132 kV circuit between SSA B and SSA C, plus Llandinam connection SSA C Windfarms to SP Manweb Llandinam Route to SSA B Windfarms to Proposed National Grid 400kV Preferred National Grid 400kV Line Summary of Effects Llandinam Route and Collector Welshpool Substation at Cefn Coch Substation - Cefn Coch (Connected from National Grid Preferred Substation Substation at Cefn Substation: (Route Options BNC 3, (Preferred Substation Location NW at Cefn Location NW at Cefn Coch to Grid Supply Point at Coch Option A BNC 4, BNC 5: Line Route Coch) Lower Frankton) (Route Options CC1, Sections 1 - 2b) CC2, CC3 and CC4: Line Route Sections 1-2a-3- 4b-5-6a-7a-8-9a-10) which will have views of provide a backdrop significant effect is properties would also include a high proportion of conifers. The there is high prevalence of trees. The landscape of more diverse and enclosed line route section 4b. for the substation between the A483 near overlook the crossing of proximity of the site to existing mature the valley sides is smaller scale and there is a landscape character types, Line route section 4b will infrastructure. Old Neuadd Bank and the Afon Gam at relatively coniferous plantations and shelter belts higher density of settlement including a number of although the corollary is also have further effects Cae-betin Wood, close range. There may be provides a structural planting context. large villages in addition to Llansantffraid-ym- that these sections tend to on individual properties Residential Visual including the open views of the route from However the screening benefits would Mechain and Llanymynech. The popular viewpoint be more populous, along the route, notably Amenity - The area hillside below the Kerry Dolau-ceimion, although only be achieved in the long term as the of Llanymynech Hill with its Heritage Trail overlooks therefore a greater at Red House and Ty’n-y- is sparsely Ridgeway Regional the lines will be planting reached full maturity. Also the this section of the preferred route corridor from the number of receptors are celyn. populated with Trail. Other areas of backclothed. entries and exit for the overhead lines north side of the valley. The farmland is attractive likely. only four landscape (e.g. the would have to kept free from tall but lacks the dramatic contrasts of the Meifod The SSAC connection to Line route sections, such properties within Canlad Valley and the Visitor Attractions - No vegetation and views of the infrastructure Valley. Around Llanymynech, the road Cefn Coch will be visible as as line route section 1, 1km of the Severn Valley) would visitor attractions have would potentially be available at these infrastructure which includes a new bypass around it crosses roads and within will be visible as they substation. Views experience minor- been identified that would points. Four Crosses, coalescing settlements, low voltage valleys and there are likely cross roads (e.g. A483). from residential moderate effects which be affected by BNC1. electricity lines and telegraph poles impart a more to be potential visual properties will be would be borderline developed character with greater human influence. effects on a number of Effects on visitor limited to the significant. Recreational Resource - By contrast the valleys sides are more tranquil and residential properties. attractions are unlikely to properties at The parallel wood pole natural in appearance. Views within and along the arise from the route Camnant Farm, Visual Effects lines would be visible valley are locally contained by vegetation but there Landscape and visual beyond localised effects Camnant Bridge Although significant or within Nant y Graig Lwyd are longer views. effects are likely along line on public footpaths. and one property verging on significant, and Nant yr Eira from the route section 1 of BNC 3, to the north-west. all the effects were Glyndwr Way, which Route Section - A483 to Woolston (Chapter 16 BNC 4 and BNC5. These views will be assessed as minor - passes between 300-500m of Ref. 4) However, these elements screened in part by moderate or moderate to the north. After crossing the A483 the landscape widens out of this scenario will be intervening and none of these into a broad, low-lying expanse of large, mainly screened from some vegetation. effects was assessed as BNC 3, 4 and 5 - line arable fields. The settlement pattern is one of receptors and directions major. route section 2b (page clustered villages, including Maesbrook, Crickheath, and the overhead line may The distance of the 87 of Ref. 1) Osbaston, Maesbury Marsh and Woolston, with potentially be seen sites from the In terms of Landscape Sensitivity - dispersed farms and properties. Some large estate alongside other above A483, the local settlements, some Route 2b crosses open farms are identified as ‘halls’. These include Morton ground equipment such landform, and properties on the edge moorland plateau, largely Hall which lies just off the B4396 between Morton the turbines of the planned intervening of Fron comprising unenclosed and Osbaston. Overall the landscape is one of wind farms. vegetation, Bank/Cilcewydd, which grass moor. It avoids the pleasant and well managed farmland. Prominent reduces visibility lie within 500m of the ridge to the north-west of landscape features include Llanymynech Hill and Effects are likely for from the road. overhead line will the NG hub, keeping to the Breidden Hill. landscape and visual experience a significant flatter ground to the south receptors around the Recreational change in their view, of the high point above Route Section - Woolston to Lower Frankton substation at Cefn Coch Resource - There is where there is no Gors-dyfwch (418m). (Chapter 17 of Ref. 4) than the SP Manweb a relatively dense screening afforded by East of Maesbury the preferred route corridor Collector Substation: network of public landform, buildings or Visual Sensitivity - Steel crosses a lowland farmland landscape of pastures Option A. It is anticipated rights of way in the vegetation. Of the towers will be visible in and arable fields, blocks of woodland, plantations that there would be vicinity of the site; many individual wider views of the and coverts. The parkland associated with nearby unrestricted and filtered two local public properties scattered moorland plateau. historic halls and the Oswestry Golf Course gives views of the substation at footpaths cross the throughout the study the area a traditional managed quality. The Cefn Coch from the site but these can area, only those close Residential Visual Amenity landform is more undulating than in the previous surrounding area, and it be diverted to an to the overhead line will - The southward alignment section with occasional low rounded hills. The would potentially be seen existing track experience a significant of 2b takes it further from farmland provides the setting for a number of alongside above ground around the site. change in their view the properties at Carreg-y- clustered villages and dispersed properties including equipment such as There would be some of which will have big and Gwaenydd, and West Felton Queen’s Head, Babbinswood, Lower overhead electricity lines views to the site views of the proposed the towers would be a Frankton and Welsh Frankton. The A5 and and the turbines of the from the adjacent overhead line. lesser presence in views. Shrewsbury to Chester railway line run in a north- planned wind farms. public footpaths However, the nature of west to south-east direction through the area. This and others in the the proposed overhead Visitor Attractions - There locally disturbs the tranquillity of the landscape. vicinity; however line, combined with the may be views of the The existing 400 kV line is a noticeable but not use of the screening effects of towers at the head of the dominant landscape feature. Llanymynech Hill and footpaths does not landform and upland valley as seen from Breidden Hill are more distant but still noticeable appear to be high. vegetation, mean that the outdoor centre at Plas landscape features, but otherwise there are few Environmental Proposed Grid Connection Topics National Grid 400kv circuit to Lower Frankton from National Grid 400kV substation at Cefn Coch, plus a 132 kV circuit between SSA B and SSA C, plus Llandinam connection SSA C Windfarms to SP Manweb Llandinam Route to SSA B Windfarms to Proposed National Grid 400kV Preferred National Grid 400kV Line Summary of Effects Llandinam Route and Collector Welshpool Substation at Cefn Coch Substation - Cefn Coch (Connected from National Grid Preferred Substation Substation at Cefn Substation: (Route Options BNC 3, (Preferred Substation Location NW at Cefn Location NW at Cefn Coch to Grid Supply Point at Coch Option A BNC 4, BNC 5: Line Route Coch) Lower Frankton) (Route Options CC1, Sections 1 - 2b) CC2, CC3 and CC4: Line Route Sections 1-2a-3- 4b-5-6a-7a-8-9a-10) its effect will be limited, y drain, 1800m to the distinctive focal points and many views fade out and no views would north-east. into distant rolling skylines. create effects on residential amenity to Recreational Resource - No the extent that they recreational resources would become an have been identified that undesirable place to would be affected by 2b. live.

Lighting Not included in Reference Not included in Llandinam Route to Not included in Reference Not included in Reference 4. Not included in Reference 4. This topic has not been 1. Reference 1. Welshpool (Chapter 1. included in the 11 of Ref. 2) environmental No significant assessments or reports for environmental effects the routes included in this are anticipated on scenario. lighting. On this basis, the decision was made to not make this topic the subject of a detailed environmental impact assessment. Noise and As no line route option is As no line route Llandinam Route to As no line route option is Preferred Substation Location NW Not included in Reference 4. It is not possible to draw Vibration considered to have a option is Welshpool (Chapter considered to have a (Section 10.2 of Ref. 3) conclusions from the greater or lesser effect in considered to have 11 of Ref. 2) greater or lesser effect in The nearest dwelling to the site is approx. environmental information respect of this topic at a greater or lesser No significant respect of this topic at this 950m to the northeast. Rating levels available, as all of the this scale, this topic has effect in respect of environmental effects scale, this topic has not below existing background levels are routes have not considered not been included as it this topic at this are anticipated for been included as it does achievable with standard noise mitigation this topic. does not assist in scale, this topic noise. On this basis, not assist in identifying a solutions. identifying a line route has not been the decision was made line route with least with least environmental included as it does to not make this topic environmental effect. This effect. This topic will be not assist in the subject of a topic will be considered at considered at the EIA identifying a line detailed environmental the EIA stage. (page 48 of Environmental Proposed Grid Connection Topics National Grid 400kv circuit to Lower Frankton from National Grid 400kV substation at Cefn Coch, plus a 132 kV circuit between SSA B and SSA C, plus Llandinam connection SSA C Windfarms to SP Manweb Llandinam Route to SSA B Windfarms to Proposed National Grid 400kV Preferred National Grid 400kV Line Summary of Effects Llandinam Route and Collector Welshpool Substation at Cefn Coch Substation - Cefn Coch (Connected from National Grid Preferred Substation Substation at Cefn Substation: (Route Options BNC 3, (Preferred Substation Location NW at Cefn Location NW at Cefn Coch to Grid Supply Point at Coch Option A BNC 4, BNC 5: Line Route Coch) Lower Frankton) (Route Options CC1, Sections 1 - 2b) CC2, CC3 and CC4: Line Route Sections 1-2a-3- 4b-5-6a-7a-8-9a-10) stage. (page 48 of Ref. route with least impact assessment. Ref. 1) 1) environmental This is because of the effect. This topic low intensity of will be considered construction activities, at the EIA stage. the very low volume of (page 48 of Ref. 1) vehicle movements which construction of the proposed overhead line would generate, the short-term (days rather than weeks) and reversible activities at each wood pole structure, and the proven methods of noise control at construction sites.

While the Draft Construction Method Statement will ultimately address noise control issues in detail it is noted that Powys CC has powers to investigate noise complaints and serve abatement notices on activities which it considers are giving rise to unacceptable levels of noise Socio As no line route option is As no line route Llandinam Route to As no line route option is Preferred Substation Location NW Route Section - Cefn Coch to Afon Banwy It is not possible to draw Economics considered to have a option is Welshpool (Chapter considered to have a (Section 10.2 of Ref. 3) (Chapter 12 of Ref. 4) conclusions from the (including greater or lesser effect in considered to have 10 of Ref. 2) greater or lesser effect in Economic Activity Tourism and recreation facilities include some environmental information Tourism and respect of this topic at a greater or lesser The design and respect of this topic at this As the site adjoins Bryn Gwyn Farmhouse caravan parks and other tourist accommodation available, as all of the Recreation) this scale, this topic has effect in respect of routeing of the scale, this topic has not the substation development may have a and the Red Ridge Activity Centre. The area is routes have not considered not been included as it this topic at this proposed overhead line been included as it does significant negative effect upon the bisected by the A458 which is unavoidable by this topic. does not assist in scale, this topic has been developed to not assist in identifying a viability of the farm holding. However, it is routeing. The road is an important tourist route. identifying a line route has not been minimise its effects on line route with least understood that the farm is to be acquired The area is also crossed by a network of public with least environmental included as it does visual amenity and environmental effect. This by the developers of the Tirgwynt wind rights of way, including two National Trails. effect. This topic will be not assist in consequently upon topic will be considered at farm; whose intentions for the use of this considered at the EIA identifying a line negative perceptions of the EIA stage. (page 48 of holding after acquisition will determine the Route Section - Meifod Valley (Chapter 14 of stage. (page 48 of Ref. route with least tourists and residents Ref. 1) effect on farm viability which a substation Ref. 4) 1) environmental alike. The proposed in this location may have. Meifod village is an active hub, which includes a effect. This topic overhead line generally Conservation Area, school, rugby club, and several will be considered avoids major The site is not visible from the local small businesses. Other settlements include Plas at the EIA stage. settlements, tourist highway network and given the adjoining Coch, Newbridge, Pentre, Clolyn, Main, Trefnanney (page 48 of Ref. 1) attractions, and local land is to be developed for a wind farm and Cefn-llyfnog. amenity assets. the substation by itself is unlikely to have a significant detrimental impact upon the Tourism and recreation facilities include caravan No significant socio- local tourism industry. parks and other tourist accommodation in nearby economic effects would Meifod and other villages. Glyndŵr’s Way is crossed arise from the by the preferred route corridor. The A495 which is construction and an important tourist route runs through the valley. Environmental Proposed Grid Connection Topics National Grid 400kv circuit to Lower Frankton from National Grid 400kV substation at Cefn Coch, plus a 132 kV circuit between SSA B and SSA C, plus Llandinam connection SSA C Windfarms to SP Manweb Llandinam Route to SSA B Windfarms to Proposed National Grid 400kV Preferred National Grid 400kV Line Summary of Effects Llandinam Route and Collector Welshpool Substation at Cefn Coch Substation - Cefn Coch (Connected from National Grid Preferred Substation Substation at Cefn Substation: (Route Options BNC 3, (Preferred Substation Location NW at Cefn Location NW at Cefn Coch to Grid Supply Point at Coch Option A BNC 4, BNC 5: Line Route Coch) Lower Frankton) (Route Options CC1, Sections 1 - 2b) CC2, CC3 and CC4: Line Route Sections 1-2a-3- 4b-5-6a-7a-8-9a-10) decommissioning of the There is a possibility that the Welsh National proposed overhead line. Eisteddfod may be held at Mathrafal in 2015. Potential effects on this event could arise during the In respect of the construction phase of the project. operational stage, the proposed overhead line Route Section - Waen-Fach to A483 (Chapter would not have any 15 of Ref. 4) significant effects upon The settlements of Llansantffraid-ym-Mechain and the local population, Llanymynech are outside but in proximity to the economy, local preferred route corridor and are the largest community assets, communities along the preferred route corridor. tourist attractions or tourism more broadly. Tourism and recreation facilities include caravan parks and other tourist accommodation in nearby The operational stage Llansantffraid-ym-Mechain and Llanymynech. Offa’s would be expected to Dyke and the Montgomery / Shropshire Union Canal have a moderately are crossed by the preferred route corridor. There significant effect upon are a number of large caravan parks in the valley tourism accommodation east of Llansantffraid-ym-Mechain. The B4398, at two sites namely the Montgomery / Shropshire Union Canal, Offa’s Dyke Tavern Caravan Park Path and the Oswestry Cycle Route cross the valley and Edderton Hall between Four Crosses and Llanymynech, whilst B&B/Guest House. If further east the A483 Corridor is a major transport proposed mitigation is route along the Severn Valley. accepted the residual effects would become Route Section - A483 to Woolston (Chapter 16 not significant at of Ref. 4) Tavern Caravan Park Settlements include Llandysilio, Four Crosses, Pant, but remain moderately Maesbrook, Crickheath, Llynclys, Morton, Morton significant for Edderton Common, Osbaston and Knockin. Tourism and Hall B&B/Guest House. recreation facilities include a caravan site at Domgay, regional trails/cycle routes and the potential expansion of the Cambrian Heritage Railways Project currently extending between Pant and Llynclys and north of Llynclys to Oswestry. There are also regional recreational trails associated with the Montgomery Canal tow path (Shropshire cycle route and Wats Dyke walk) which should be considered.

Route Section - Woolston to Lower Frankton (Chapter 17 of Ref. 4) Considerations for routeing in this area included, amongst others: The golf course at Oswestry; the Montgomery / Shropshire Union Canal, which is navigable through this section of the preferred route corridor; the proposed Queen’s Head Marina development; a number of Parks and Gardens, some of which are event venues, including Pradoe, Tedsmore Hall, Aston Hall, Whittington Castle, Halston Hall, Woodhouse and Park Hall (The Countryside Experience); Knockin and Rednal airfields; and the Knockin telescope. Environmental Proposed Grid Connection Topics National Grid 400kv circuit to Lower Frankton from National Grid 400kV substation at Cefn Coch, plus a 132 kV circuit between SSA B and SSA C, plus Llandinam connection SSA C Windfarms to SP Manweb Llandinam Route to SSA B Windfarms to Proposed National Grid 400kV Preferred National Grid 400kV Line Summary of Effects Llandinam Route and Collector Welshpool Substation at Cefn Coch Substation - Cefn Coch (Connected from National Grid Preferred Substation Substation at Cefn Substation: (Route Options BNC 3, (Preferred Substation Location NW at Cefn Location NW at Cefn Coch to Grid Supply Point at Coch Option A BNC 4, BNC 5: Line Route Coch) Lower Frankton) (Route Options CC1, Sections 1 - 2b) CC2, CC3 and CC4: Line Route Sections 1-2a-3- 4b-5-6a-7a-8-9a-10) Traffic and CC1, CC2, CC3 and SP Manweb Llandinam Route to BNC 3, 4 and 5 - line Preferred Substation Location NW Route Section - Cefn Coch to Afon Banwy Most routes/sites in this Transport CC4: Line Route Collector Welshpool (Chapter route section 1 (page (Section 10.2 of Ref. 3) (Chapter 12 of Ref. 4) scenario are accessible by Sections 1-2a-3-4b-5- Substation: 11 of Ref. 2) 88 of Ref. 1) The site will require a significant length of Access restrictions due to the extent of the local existing farm tracks or 6a-7a-8-9a-10 Option A (Tables No significant Access to the route will be new access road from New Road. road network and the steep terrain will need to be main public roads. (Appendix 6.1 of Ref. 6.4 and 6.5 of environmental effects via existing forest tracks considered. Whether the connection is made However, localised 1) Ref. 1) are anticipated on across steep ground. underground or by overhead line there will be a instances may occur where The line route sections The site is traffic and transport. need to access the construction areas in order to the terrain makes access could be accessed by accessible from On this basis, the BNC 3, 4 and 5 - line deliver plant, labour and materials to the route and difficult, or lengths of new existing public roads and existing farm decision was made to route section 2b (page working areas. Construction access and associated access road are required. farm tracks in most tracks. not make this topic the 88 of Ref. 1) enabling works would be required and it is likely Some routes, particularly cases, however a small subject of a detailed Access to the route will be access to the route and a working easement would the 400kV line, will need number of the line route environmental impact via existing forest tracks be required across private land. to cross rail lines and sections (e.g. 2a, 3, 7a) assessment. across steep ground. major roads. would have to be Route Section - Meifod Valley (Chapter 14 of accessed via fields The main issue of Ref. 4) involving crossing some concern with respect to The location of the A495 may make it easier to existing hedgerows traffic would be the transport materials to site hence minimising between fields. Also, the creation of construction environmental effects. steep terrain and lack of and maintenance existing tracks will need accesses and then Route Section - Waen-Fach to A483 (Chapter to be taken account of accessing otherwise 15 of Ref. 4) for some line route inaccessible fields with Access - there is potential access from the B4393 in sections (e.g. 1 and 10). construction vehicles. the west but limited access from the east so there This would be set out in could be a requirement for a temporary bridge over the Draft Construction the River Vyrnwy. Access to the south side of the and Method Statement river is difficult and via narrow lanes. as part of the planning conditions, and would Route Section - Woolston to Lower Frankton be developed in (Chapter 17 of Ref. 4) consultation with Powys Any route will need to cross the A5 and the Highways Authority. Shrewsbury to Chester railway line (Network Rail Route 75) to join into the existing 400 kV overhead line. Waste As no line route option is As no line route Llandinam Route to As no line route option is Not included in Reference 3. Not included in Reference 5. This topic has not been Management considered to have a option is Welshpool (Chapter considered to have a included in the greater or lesser effect in considered to have 11 of Ref. 2) greater or lesser effect in environmental respect of this topic at a greater or lesser No significant respect of this topic at this assessments or reports for this scale, this topic has effect in respect of environmental effects scale, this topic has not the routes included in this not been included as it this topic at this are anticipated on been included as it does scenario. does not assist in scale, this topic waste management. not assist in identifying a identifying a line route has not been On this basis, the line route with least with least environmental included as it does decision was made to environmental effect. This effect. This topic will be not assist in not make this topic the topic will be considered at considered at the EIA identifying a line subject of a detailed the EIA stage. (page 48 of stage. (page 48 of Ref. route with least environmental impact Ref. 1) 1) environmental assessment. effect. This topic will be considered at the EIA stage. (page 48 of Ref. 1) Environmental Proposed Grid Connection Topics National Grid 400kv circuit to Lower Frankton from National Grid 400kV substation at Cefn Coch, plus a 132 kV circuit between SSA B and SSA C, plus Llandinam connection SSA C Windfarms to SP Manweb Llandinam Route to SSA B Windfarms to Proposed National Grid 400kV Preferred National Grid 400kV Line Summary of Effects Llandinam Route and Collector Welshpool Substation at Cefn Coch Substation - Cefn Coch (Connected from National Grid Preferred Substation Substation at Cefn Substation: (Route Options BNC 3, (Preferred Substation Location NW at Cefn Location NW at Cefn Coch to Grid Supply Point at Coch Option A BNC 4, BNC 5: Line Route Coch) Lower Frankton) (Route Options CC1, Sections 1 - 2b) CC2, CC3 and CC4: Line Route Sections 1-2a-3- 4b-5-6a-7a-8-9a-10) Water CC1, CC2, CC3 and SP Manweb Llandinam Route to BNC 3, 4 and 5 - line Preferred Substation Location NW Route Section - Cefn Coch to Afon Banwy Flood risk is not expected Environment CC4: Line Route Collector Welshpool (Chapter route section 1 (page (Section 10.2 of Ref. 3) (Chapter 12 of Ref. 4) to be an issue for most Sections 1-2a-3-4b-5- Substation: 9 of Ref. 2) 87 of Ref. 1) Flood Risk The area between Cefn Coch and the Afon Banwy routes included in this 6a-7a-8-9a-10 Option A (Tables It is considered that, if Flood Risk - Route 1 The site is 2km upstream of the limit of EA includes the indicative floodplains of the Afon Rhiw scenario. However, the (Appendix 6.1 of Ref. 6.4 and 6.5 of the mitigation crosses the Afon Gam fluvial flood mapping but given the and the Afon Einion / Afon Banwy. The area also 400kV line preferred route 1) Ref. 1) measures discussed flood zone north of location of this site at the top of a contains peat particularly in the north. Areas of crosses extensive areas of Water Quality - Line Flood Zones - A above and detailed fully Cwmderwen. The Afon catchment, there is unlikely to be any marsh/wetland are present in the west, with the flood plain, areas of route section 1 crosses narrow flood zone in the Draft Gam is approximately flood risk associated with this site. As a majority particularly to the north of the area, near indicative reservoir flood four tributaries of the lies 0.3km to the Construction Method 120m wide at this point small watercourse flows through the site Mynydd y Gribin. risk and groundwater flows River Wye SAC and River north and 0.7km to Statement are and will not pose a details will need to be developed as to Route Section - Meifod Valley (Chapter 14 of associated with floodplain Ithon SSSI. the east of the successfully constraint to the route. how it is to be managed e.g. culverted, Ref. 4) areas, which all requires site. It is less than implemented, the bunded etc. Various river courses extend across the route consideration. Flood Risk - Line route 50m wide and will construction, operation BNC 3, 4 and 5 - line corridor including through the Meifod Valley. NRW sections 1, 3, 4b, 5, and not be affected by and decommissioning route section 2b (page Wa ter Resources and Quality (previously Environment Agency Wales) has noted The routes will cross many 6a cross flood zones the substation. effects of the proposed 87 of Ref. 1) No licensed or unlicensed public or private that the valley contains examples of rock tributaries, including rivers (including: the River overhead line on Flood Risk - 2b does not water supplies or abstractions are located sequencing which may be affected by routeing. within SSSIs and SACs Ithon flood zone, Severn hydrology, cross any flood zone. within the area or within 500m of the site. Extensive areas of indicative flood risk (Flood Zones however these can be Valley flood zone, and groundwater, flood risk 2 and 3) and indicative areas of reservoir flood risk spanned by wood pole the Adon Trannon flood and water quality would As a series of small streams drain the site associated with Lake Vyrnwy. Goundwater infrastructure and zone) and tributaries not result in any likely area, there is a potentially low risk for movement including within the Vyrnwy floodplain mitigation measures will within these flood zones, significant adverse long minor effect to both the surface water needs to be considered. ensure their protection which may form a term effects. flows and quality, with the proposed Route Section - Waen-Fach to A483 (Chapter during construction. constraint to routeing in substation potentially affecting both 15 of Ref. 4) some locations. ground water recharge and surface run-off Considerations for routeing in this area include, characteristics within the site area. amongst other things: the extensive floodplain (indicative Flood Zones 2 and 3) associated with the River Vyrnwy and Afon Cain. The River Vyrnwy also has associated areas of indicative reservoir flood risk; and groundwater flows associated with floodplain areas. Route Section - A483 to Woolston (Chapter 16 of Ref. 4) Considerations for routeing in this area include, amongst others: the extensive floodplain in the west (indicative Flood Zones 2 and 3) associated with the River Vyrnwy; the River Vyrnwy has associated areas of indicative reservoir flood risk; groundwater flows associated with floodplain areas; and a small extent of Environment Agency Source Protection Zone 3 (SPZ3) (total catchment) is located at the north-east corner of the preferred route corridor. Route Section - Woolston to Lower Frankton (Chapter 17 of Ref. 4) Considerations for routeing in this area included, amongst others: the indicative Flood Zones 2 and 3 associated with the River Morda and its tributaries in the west and tributaries to the River Perry in the east; and the northern half of the preferred route corridor lies within an extensive area of Environment Agency Source Protection Zone 3 (SPZ3) (total catchment). This SPZ also extends within the east of the route corridor. Environmental Proposed Grid Connection Topics National Grid 400kv circuit to Lower Frankton from National Grid 400kV substation at Cefn Coch, plus a 132 kV circuit between SSA B and SSA C, plus Llandinam connection SSA C Windfarms to SP Manweb Llandinam Route to SSA B Windfarms to Proposed National Grid 400kV Preferred National Grid 400kV Line Summary of Effects Llandinam Route and Collector Welshpool Substation at Cefn Coch Substation - Cefn Coch (Connected from National Grid Preferred Substation Substation at Cefn Substation: (Route Options BNC 3, (Preferred Substation Location NW at Cefn Location NW at Cefn Coch to Grid Supply Point at Coch Option A BNC 4, BNC 5: Line Route Coch) Lower Frankton) (Route Options CC1, Sections 1 - 2b) CC2, CC3 and CC4: Line Route Sections 1-2a-3- 4b-5-6a-7a-8-9a-10) Technical CC1, CC2, CC3 and SP Manweb Not covered in BNC 3, 4 and 5 - line Preferred Substation Location NW Route Section - Cefn Coch to Afon Banwy This information is not Review CC4: Line Route Collector Reference 2. route section 1 (page (Section 10.2 of Ref. 3) (Chapter 12 of Ref. 4) applicable to cumulative Sections 1-2a-3-4b-5- Substation: 88 of Ref. 1) The site sits within a shallow valley with This material is normally compressible and creates impacts as it has been 6a-7a-8-9a-10 Option A (Tables Existing and Proposed OHL ground levels rising steeply towards the greater difficulties for an underground connection, included for reference (Appendix 6.1 of Ref. 6.4 and 6.5 of Infrastructure 33kV and southern part of the site. To create a for example for the laying out of cable and for cable only. 1) Ref. 1) 132kV - This route would development plateau, some earthworks joints to avoid settlement issues. It is likely that the Existing and Proposed This site could be crossed by the Nant y will be required. Earthworks should be increased construction activity for the installation of OHL Infrastructure 33kV accommodate the Moch Wind Farm OHL easier in Glacial soils than, although the an underground cable could have a greater and 132kV - This route required route. thickness of these is unknown. If detrimental impact on the peat. would cross existing equipment. required, cutting operations through 33kV OHL at certain line Existing and Proposed sandstone bedrock will likely necessitate route sections, however, Wind Turbines - The route the use of hydraulic breakers or blasting. this could be passes within proximity of undergrounded. a number of turbines, A watercourse runs through the centre of however the required the site from West to East and will need Existing and Proposed distance from turbines can diverting using surface ditches. Wind Turbines - Line be maintained during the route section 1 passes detailed design stage. within proximity of turbines; however it will Altitude and Topography - be possible to maintain The route would start at a the required distance. height of 340m, reducing Line route sections 9a to 260m at the Afon Gam and 10 also pass within before increasing in height proximity of turbines but to 380m. Gradients would it may not be possible to be 0-150. maintain the required distance for line route BNC 3, 4 and 5 - line section 9a. route section 2b (page 88 of Ref. 1) Altitude and Topography Existing and Proposed OHL - The altitude and Infrastructure 33kV and topography varies 132kV - This route would throughout the route, as be crossed by the Nant y demonstrated from the Moch OHL route. examples detailed below: Existing and Proposed Line route section 1: The Wind Turbines - The route eastern end of this route passes within proximity of would cover altitudes of a number of potential up to 455m at the turbines, and it may not substation at Llanbadarn be possible to maintain the Fynydd. Moving west, the required distance at the land height is 373m at eastern end. the Neuadd Goch substation. As the line Altitude and Topography - moves south-west, land The land height increases heights increase to from 360m to 410m before around 420m at reducing to 370m at the Llaithddu and then higher substation. Gradients are to around 550m at between 0-150. Hirddywel. Gradients range between 0-15°. As the line passes west of Hirddywel, there is a Environmental Proposed Grid Connection Topics National Grid 400kv circuit to Lower Frankton from National Grid 400kV substation at Cefn Coch, plus a 132 kV circuit between SSA B and SSA C, plus Llandinam connection SSA C Windfarms to SP Manweb Llandinam Route to SSA B Windfarms to Proposed National Grid 400kV Preferred National Grid 400kV Line Summary of Effects Llandinam Route and Collector Welshpool Substation at Cefn Coch Substation - Cefn Coch (Connected from National Grid Preferred Substation Substation at Cefn Substation: (Route Options BNC 3, (Preferred Substation Location NW at Cefn Location NW at Cefn Coch to Grid Supply Point at Coch Option A BNC 4, BNC 5: Line Route Coch) Lower Frankton) (Route Options CC1, Sections 1 - 2b) CC2, CC3 and CC4: Line Route Sections 1-2a-3- 4b-5-6a-7a-8-9a-10) section of land with a gradient of between 15- 22°. The height of land then reduces to around 320m as the route moves west before turning north.

Line route section 5 : Route 5 runs north-south over land heights between 170 – 300m. The northern section crosses gradients of between 15 -220.

Line route section 9a : The southern section of 9a crosses a section of land with a gradient of 15 to 220. As it moves north, land heights range from 420m to 370m before increasing again to 440m.

References (Ref.):

(1) SP MANWEB (Sept 2013). SP Mid Wales Connections, Line Routing Methodology & Appraisal - Phase 3 Report.

(2) SP MANWEB (Oct 2013). Volume 1: New 132kV Overhead Line Connection from Llandinam Wind Farm to Welshpool Substation - Updated Environmental Statement.

(3) National Grid (Sept 2013). Mid Wales Connection Project, Draft Substation Site Report.

(4) National Grid (Sept 2013). Mid Wales Connection Project, Draft Route Report.

Mid Wales Conjoined Mid-WalesWind Farm (Powys) Inquiry: Conjoined Grid Session 4 Evidence Legacy Wind Farms Public Inquiry Supplementary Environmental Information on Grid Scenarios

Scenario 1

Sir Ddinbych - Scenario 1 Denbighshire Wrecsam 132 kV HDWP line from SSA C to connect to the SP Manweb - Wrexham network at Welshpool. Requires significant SP Manweb Lower reinforcements north of Welshpool Frankton

Wind Farm Application Boundaries

Gwynedd 5 PLI Schemes - Turbine Locations ! Llanbrynmair, 30 turbines, 126.5m to tip ! Carnedd Wen, 50 turbines, 137m to tip ! Llandinam Repowering, 34 turbines, Powys Shrewsbury 121.2m to tip ! Llanbadarn Fynydd, 17 turbines, 125m to tip ! Llaithddu, 27 turbines, 115.5m to tip

Planning Authority Boundary

Existing Grid Connection Network

400kV Overhead Network

Carnedd ! ! ! ! ! ! !! ! ! ! ! ! 132kV Overhead Network Wen ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! !! ! ! ! ! ! ! Proposed Substation Locations ! ! ! ! ! ! ! ! ! ! Llanbrynmair ") ! ! ! Contracted Substation Location ! ! ! Welshpool ! ! ! ! ! ! ! ! ! ") ! ! !! ! SP Manweb Collector Substation ! ! ! ")") Shropshire ! (Option A) ! ! ! ! ! !!! ! National Grid Potential Substation

SPEN Proposed Grid Connection Network BNC 132kV Proposed Overhead Line Connection CC 1-4 - 132kV/33kV Proposed Overhead Line Connection

National Grid Proposed Grid Connection Network

400kV Draft National Grid Route - Overhead 400kV Draft National Grid Route - Underground

Llandinam Llandinam Proposed Grid Connection Repowering 132kV Proposed Llandinam ! ! ! ! ! Overhead Line Connection ! ! ! ! ! ! ! ! ") !! ! ! ! ! ! ! ! !! ! !! ! ! ") ! !! Figure 1 ! ! !! ! Llanbadarn Fynydd ! ! ! ! ! ! ! ! ") ! !! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! Map Scale @ A3:1:300,000 !")! ! ! ! ! ! ! ! ! !! ! Llaithddu ! Note: SPEN Proposed Grid Connection Network Sir Ceredigion 0 2.5 5 10 15 km All 100m Wide Line Routes are Subject to - Ceredigion I Further Environmental and Technical Evaluation. Reproduced from Ordnance Survey digital map data © Crown copyright 2013. All rights reserved. LUC GLA FIG01-00_5920-001-r2_Scenario_1_A3L 23/12/2013 Mid Wales Conjoined Mid-WalesWind Farm (Powys) Inquiry: Conjoined Grid Session 4 Evidence Legacy Wind Farms Public Inquiry Supplementary Environmental Information on Grid Scenarios

Scenario 2

Sir Ddinbych - Scenario 2 Denbighshire Wrecsam The connection to Welshpool, as outlined in option 1, plus a - Wrexham 132 kV HDWP connection to Shrewsbury Lower Frankton

Wind Farm Application Boundaries

Planning Authority Boundary

Existing Grid Connection Network

400kV Overhead Network

Carnedd ! ! ! ! ! ! !! ! ! ! ! ! 132kV Overhead Network Wen ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! !! ! ! ! ! ! ! ! ! ! ! Proposed Substation Locations ! ! ! ! ! ! Llanbrynmair ") ! ! ! Contracted Substation Location ! ! ! Welshpool ! ! ! ! ! ! ! ! ! ") ! ! !! ! SP Manweb Collector Substation ! ! ! ") Shropshire ! ") ! (Option A) ! ! ! ! !!! ! National Grid Potential Substation

SPEN Proposed Grid Connection Network BNC 132kV Proposed Overhead Line Connection CC 1-4 - 132kV/33kV Proposed Overhead Line Connection

National Grid Proposed Grid Connection Network

400kV Draft National Grid Route - Overhead 400kV Draft National Grid Route - Underground

Llandinam Llandinam Proposed Grid Connection Repowering 132kV Proposed Llandinam ! ! ! ! ! Overhead Line Connection ! ! ! ! ! ! ! ! ") !! ! ! ! ! ! ! ! !! ! !! ! ! ") ! !! Figure 2 ! ! !! ! Llanbadarn Fynydd ! ! ! ! ! ! ! ! ") ! !! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! Map Scale @ A3:1:300,000 !")! ! ! ! ! ! ! ! ! !! ! Llaithddu ! Note: SPEN Proposed Grid Connection Network Sir Ceredigion 0 2.5 5 10 15 km All 100m Wide Line Routes are Subject to - Ceredigion I Further Environmental and Technical Evaluation. Reproduced from Ordnance Survey digital map data © Crown copyright 2013. All rights reserved. LUC GLA FIG02-00_5920-002-r2_Scenario_2_A3L 23/12/2013 Mid Wales Conjoined Mid-WalesWind Farm (Powys) Inquiry: Conjoined Grid Session 4 Evidence Legacy Wind Farms Public Inquiry Supplementary Environmental Information on Grid Scenarios

Scenario 3

Sir Ddinbych - Scenario 3 Denbighshire Wrecsam The connection to Welshpool, as outlined in option 1, plus a - Wrexham 132 kV HDWP from SSA C to SSA B. This assumes there Lower must be (at least) one circuit to Legacy (see the following options) Frankton

Wind Farm Application Boundaries

Planning Authority Boundary

Existing Grid Connection Network

400kV Overhead Network

SPEN Proposed Grid Connection Network BNC 132kV Proposed Overhead Line Connection CC 1-4 - 132kV/33kV Proposed Overhead Line Connection

National Grid Proposed Grid Connection Network

400kV Draft National Grid Route - Overhead 400kV Draft National Grid Route - Underground

Llandinam Llandinam Proposed Grid Connection Repowering 132kV Proposed Llandinam ! ! ! ! ! Overhead Line Connection ! ! ! ! ! ! ! ! ") !! ! ! ! ! ! ! ! !! ! !! ! ! ") ! !! Figure 3 ! ! !! ! Llanbadarn Fynydd ! ! ! ! ! ! ! ! ") ! !! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! Map Scale @ A3:1:300,000 !")! ! ! ! ! ! ! ! ! !! ! Llaithddu ! Note: SPEN Proposed Grid Connection Network Sir Ceredigion 0 2.5 5 10 15 km All 100m Wide Line Routes are Subject to - Ceredigion I Further Environmental and Technical Evaluation. Reproduced from Ordnance Survey digital map data © Crown copyright 2013. All rights reserved. LUC GLA FIG03-00_5920-003-r2_Scenario_3_A3L 23/12/2013 Mid Wales Conjoined Mid-WalesWind Farm (Powys) Inquiry: Conjoined Grid Session 4 Evidence Legacy Wind Farms Public Inquiry Supplementary Environmental Information on Grid Scenarios

Scenario 4

Sir Ddinbych - Scenario 4 Denbighshire Wrecsam 132 kV HDWP circuit to Welshpool from SSA B - Wrexham

Lower Frankton

Wind Farm Application Boundaries

Planning Authority Boundary

Existing Grid Connection Network

400kV Overhead Network

SPEN Proposed Grid Connection Network BNC 132kV Proposed Overhead Line Connection CC 1-4 - 132kV/33kV Proposed Overhead Line Connection

National Grid Proposed Grid Connection Network

400kV Draft National Grid Route - Overhead 400kV Draft National Grid Route - Underground

Llandinam Llandinam Proposed Grid Connection Repowering 132kV Proposed Llandinam ! ! ! ! ! Overhead Line Connection ! ! ! ! ! ! ! ! ") !! ! ! ! ! ! ! ! !! ! !! ! ! ") ! !! Figure 4 ! ! !! ! Llanbadarn Fynydd ! ! ! ! ! ! ! ! ") ! !! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! Map Scale @ A3:1:300,000 !")! ! ! ! ! ! ! ! ! !! ! Llaithddu ! Note: SPEN Proposed Grid Connection Network Sir Ceredigion 0 2.5 5 10 15 km All 100m Wide Line Routes are Subject to - Ceredigion I Further Environmental and Technical Evaluation. Reproduced from Ordnance Survey digital map data © Crown copyright 2013. All rights reserved. LUC GLA FIG04-00_5920-004-r2_Scenario_4_A3L 23/12/2013 Mid Wales Conjoined Mid-WalesWind Farm (Powys) Inquiry: Conjoined Grid Session 4 Evidence Legacy Wind Farms Public Inquiry Supplementary Environmental Information on Grid Scenarios

Scenario 5

Sir Ddinbych - Scenario 5 Denbighshire Wrecsam 132 kV HDWP circuit (124 MVA or 176 MVA) to Legacy from - Wrexham SSA B, plus connection option 1

Lower Frankton

Wind Farm Application Boundaries

Planning Authority Boundary

Existing Grid Connection Network

400kV Overhead Network

SPEN Proposed Grid Connection Network BNC 132kV Proposed Overhead Line Connection CC 1-4 - 132kV/33kV Proposed Overhead Line Connection

National Grid Proposed Grid Connection Network

400kV Draft National Grid Route - Overhead 400kV Draft National Grid Route - Underground

Llandinam Llandinam Proposed Grid Connection Repowering 132kV Proposed Llandinam ! ! ! ! ! Overhead Line Connection ! ! ! ! ! ! ! ! ") !! ! ! ! ! ! ! ! !! ! !! ! ! ") ! !! Figure 5 ! ! !! ! Llanbadarn Fynydd ! ! ! ! ! ! ! ! ") ! !! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! Map Scale @ A3:1:300,000 !")! ! ! ! ! ! ! ! ! !! ! Llaithddu ! Note: SPEN Proposed Grid Connection Network Sir Ceredigion 0 2.5 5 10 15 km All 100m Wide Line Routes are Subject to - Ceredigion I Further Environmental and Technical Evaluation. Reproduced from Ordnance Survey digital map data © Crown copyright 2013. All rights reserved. LUC GLA FIG05-00_5920-005-r2_Scenario_5_A3L 23/12/2013 Mid Wales Conjoined Mid-WalesWind Farm (Powys) Inquiry: Conjoined Grid Session 4 Evidence Legacy Wind Farms Public Inquiry Supplementary Environmental Information on Grid Scenarios

Scenario 6

Sir Ddinbych - Scenario 6 Denbighshire Wrecsam 132 kV HDWP circuit (176 MVA) to Legacy from SSA B, plus - Wrexham connection option 1, plus 132 kV HDWP between SSA B and SSA C Lower Frankton

Wind Farm Application Boundaries

Planning Authority Boundary

Existing Grid Connection Network

400kV Overhead Network

SPEN Proposed Grid Connection Network BNC 132kV Proposed Overhead Line Connection CC 1-4 - 132kV/33kV Proposed Overhead Line Connection

National Grid Proposed Grid Connection Network

400kV Draft National Grid Route - Overhead 400kV Draft National Grid Route - Underground

Llandinam Llandinam Proposed Grid Connection Repowering 132kV Proposed Llandinam ! ! ! ! ! Overhead Line Connection ! ! ! ! ! ! ! ! ") !! ! ! ! ! ! ! ! !! ! !! ! ! ") ! !! Figure 6 ! ! !! ! Llanbadarn Fynydd ! ! ! ! ! ! ! ! ") ! !! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! Map Scale @ A3:1:300,000 !")! ! ! ! ! ! ! ! ! !! ! Llaithddu ! Note: SPEN Proposed Grid Connection Network Sir Ceredigion 0 2.5 5 10 15 km All 100m Wide Line Routes are Subject to - Ceredigion I Further Environmental and Technical Evaluation. Reproduced from Ordnance Survey digital map data © Crown copyright 2013. All rights reserved. LUC GLA FIG06-00_5920-006-r2_Scenario_6_A3L 23/12/2013 Mid Wales Conjoined Mid-WalesWind Farm (Powys) Inquiry: Conjoined Grid Session 4 Evidence Legacy Wind Farms Public Inquiry Supplementary Environmental Information on Grid Scenarios

Scenario 7

Sir Ddinbych - Scenario 7 Denbighshire Wrecsam 2 x 132 kV HDWP circuits to Legacy from SSA B, plus - Wrexham connection option 1

Lower Frankton

Wind Farm Application Boundaries

Planning Authority Boundary

Existing Grid Connection Network

400kV Overhead Network

SPEN Proposed Grid Connection Network BNC 132kV Proposed Overhead Line Connection CC 1-4 - 132kV/33kV Proposed Overhead Line Connection

National Grid Proposed Grid Connection Network

400kV Draft National Grid Route - Overhead 400kV Draft National Grid Route - Underground

Llandinam Llandinam Proposed Grid Connection Repowering 132kV Proposed Llandinam ! ! ! ! ! Overhead Line Connection ! ! ! ! ! ! ! ! ") !! ! ! ! ! ! ! ! !! ! !! ! ! ") ! !! Figure 7 ! ! !! ! Llanbadarn Fynydd ! ! ! ! ! ! ! ! ") ! !! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! Map Scale @ A3:1:300,000 !")! ! ! ! ! ! ! ! ! !! ! Llaithddu ! Note: SPEN Proposed Grid Connection Network Sir Ceredigion 0 2.5 5 10 15 km All 100m Wide Line Routes are Subject to - Ceredigion I Further Environmental and Technical Evaluation. Reproduced from Ordnance Survey digital map data © Crown copyright 2013. All rights reserved. LUC GLA FIG07-00_5920-007-r2_Scenario_7_A3L 23/12/2013 Mid Wales Conjoined Mid-WalesWind Farm (Powys) Inquiry: Conjoined Grid Session 4 Evidence Legacy Wind Farms Public Inquiry Supplementary Environmental Information on Grid Scenarios

Scenario 8a

Sir Ddinbych - Scenario 8a Denbighshire Wrecsam 2 x 132 kV circuits (2 x HDWP or an L4 tower line) to Legacy from - Wrexham SSA B, plus a 132 kV circuit between SSA B and SSA C, Lower plus connection option 1 Frankton

Wind Farm Application Boundaries

Planning Authority Boundary

Existing Grid Connection Network

400kV Overhead Network

SPEN Proposed Grid Connection Network BNC 132kV Proposed Overhead Line Connection CC 1-4 - 132kV/33kV Proposed Overhead Line Connection

National Grid Proposed Grid Connection Network

400kV Draft National Grid Route - Overhead 400kV Draft National Grid Route - Underground

Llandinam Llandinam Proposed Grid Connection Repowering 132kV Proposed Llandinam ! ! ! ! ! Overhead Line Connection ! ! ! ! ! ! ! ! ") !! ! ! ! ! ! ! ! !! ! !! ! ! ") ! !! Figure 8 ! ! !! ! Llanbadarn Fynydd ! ! ! ! ! ! ! ! ") ! !! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! Map Scale @ A3:1:300,000 !")! ! ! ! ! ! ! ! ! !! ! Llaithddu ! Note: SPEN Proposed Grid Connection Network Sir Ceredigion 0 2.5 5 10 15 km All 100m Wide Line Routes are Subject to - Ceredigion I Further Environmental and Technical Evaluation. Reproduced from Ordnance Survey digital map data © Crown copyright 2013. All rights reserved. LUC GLA FIG08-00_5920-008-r2_Scenario_8a_A3L 23/12/2013 Mid Wales Conjoined Mid-WalesWind Farm (Powys) Inquiry: Conjoined Grid Session 4 Evidence Legacy Wind Farms Public Inquiry Supplementary Environmental Information on Grid Scenarios

Scenario 8b

Sir Ddinbych - Scenario 8b Denbighshire Wrecsam National Grid 400kv circuit to Lower Frankton from National - Wrexham Grid 400kV substation at Cefn Coch, plus a 132 kV circuit Lower between SSA B and SSA C, plus connection option 1 Frankton

Wind Farm Application Boundaries

Planning Authority Boundary

Existing Grid Connection Network

400kV Overhead Network

SPEN Proposed Grid Connection Network BNC 132kV Proposed Overhead Line Connection CC 1-4 - 132kV/33kV Proposed Overhead Line Connection

National Grid Proposed Grid Connection Network

400kV Draft National Grid Route - Overhead 400kV Draft National Grid Route - Underground

Llandinam Llandinam Proposed Grid Connection Repowering 132kV Proposed Llandinam ! ! ! ! ! Overhead Line Connection ! ! ! ! ! ! ! ! ") !! ! ! ! ! ! ! ! !! ! !! ! ! ") ! !! Figure 9 ! ! !! ! Llanbadarn Fynydd ! ! ! ! ! ! ! ! ") ! !! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! Map Scale @ A3:1:300,000 !")! ! ! ! ! ! ! ! ! !! ! Llaithddu ! Note: SPEN Proposed Grid Connection Network Sir Ceredigion 0 2.5 5 10 15 km All 100m Wide Line Routes are Subject to - Ceredigion I Further Environmental and Technical Evaluation. Reproduced from Ordnance Survey digital map data © Crown copyright 2013. All rights reserved. LUC GLA FIG09-00_5920-009-r2_Scenario_8b_A3L 23/12/2013