In July 2024, RES submitted a planning application for the 13 turbine Mynydd Maen Wind Farm to Planning and Environment Decisions Wales (PEDW) and the formal 5-week consultation period commenced on 14 April 2025. A statutory consultation period was advertised by PEDW to enable the public, as well as statutory consultees, to submit their comments on the proposal. The closing date for comments was 19 May 2025.
After reviewing the planning application and written representations, PEDW's appointed Inspector requested Further Information to benefit their Examination. A statutory consultation period was advertised by PEDW to enable the public, as well as statutory consultees, to submit their comments on the Further Information, which closed on 14 October 2025.
Following the formal 5-week consultation period for the Further Information, Hearings were held between 2 and 4 December 2025. The Inspector is expected to complete his report for the Welsh Ministers in the first quarter of 2026 with a decision from the Welsh Ministers expected within 12 weeks of receiving the Inspector's report.
Further Information - August 2025
In August 2025, RES submitted Further Information to PEDW in support of the application, this included responses on matters including cultural heritage, ecology and habitat, landscape and visual impact, peatland resource, and mineral safeguarding.
- Further Information Covering Letter
- Cultural Heritage Response
- Ecology and Habitat Response (updated 23 Sept 25)
- Landscape and Visual Impact Response
- Mineral Safeguarding Response
- Peatland Resource Response (Rigare)
- Peatland Resource Response (SLR)
- Planning Statement Update
Planning Application - July 2024
- Acceptance of Notice under Article 6 of the Developments of National Significance (Procedure) (Wales) Order 2016
- Notice under Articles 8 and 9(2) of the Developments of National Significance (Procedure) (Wales) Order 2016
- Notice under Articles 16(1) of the Developments of National Significance (Procedure) (Wales) Order 2016
- Developments of National Significance Application Form
Environmental Statement Volume 1: Non Technical Summary
Environmental Statement Volume 2: Main Text
- Preface
- Introduction
- Design Evolution and Alternatives
- Proposed Development
- The Statutory and Policy Framework
- Landscape and Visual
- Ecology
- Ornithology
- Cultural Heritage
- Hydrology and Hydrogeology
- Traffic, Transport and Access
- Acoustics
- Shadow Flicker - Reflected Light
- Aviation and Electromagnetic Interference
- Socio-economics
- Schedule of Mitigation
Viewing the application
You can view the Further Information (and the planning application) below. The Further Information and planning application can also be viewed on the PEDW website at planningcasework.service.gov.wales/ using the reference DNS/3276725.
RES has an Environmental Management System which actively encourages the reduction of paper consumption and promotes recycling where possible. To further reduce paper use, RES would prefer that the Environmental Statement (ES) is viewed on the project website or that copies of the ES are requested in USB format. Hard copies of the full ES are available to purchase from RES at a cost of £250. Copies of the full ES are available on USB free of charge. Hard copies of the non-technical summary are available free of charge. Requests for documents should be made in writing, including payment if purchase of the full ES is required, to RES, Beaufort Court, Egg Farm Lane, Kings Langley, WD4 8LR or by email to james.robson@res-group.com.
Site location
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Infrastructure layout
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Habitat Management Plan
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Environmental Statement Volume 3: Figures
- Table of Figures
- Figure 1.1 Site Location Plan
- Figure 1.2 Planning Application Boundary
- Figure 2.1 Key Constraints and Infrastructure
- Figure 2.2 Turbine Layout
- Figure 2.3 Turbine Layout Evolution
- Figure 3.1 Infrastructure Layout
- Figure 3.2 Typical Wind Turbine Elevation
- Figure 3.3a Typical Wind Turbine Gravity Foundation
- Figure 3.3b Typical Wind Turbine Piled Foundation
- Figure 3.4 Crane Hardstanding General Arrangement
- Figure 3.5 Access Track Typical Details
- Figure 3.6 a, b, c & d Substation Building and Compound
- Figure 3.7 Site Entrance
- Figure 3.8 Typical Temporary Construction Compound
- Figure 3.9 Indicative Borrow Pit Details
- Figure 3.10 Typical Cable Trench Details
- Figure 3.11 Potential Contamination Sources
- Figure 3.12 Substation Welfare Building Wastewater Treatment and Discharge
- Figure 4.1 Planning Application Boundary & Pre-Assessed Area 10
- Figure 5.1 Site Location and Initial LVIA Study Area 35 km
- Figure 5.2 Site Location and Detailed LVIA Study Area 24 km
- Figure 5.3 Blade Tip ZTV to 35 km with Viewpoints
- Figure 5.4 Blade Tip ZTV to 24 km with Viewpoints
- Figure 5.5 Hub Height ZTV to 35 km with Viewpoints
- Figure 5.6 Hub Height ZTV to 24 km with Viewpoints
- Figure 5.7 Landscape Designations within 35 km
- Figure 5.8 Landscape Designations within 24 km
- Figure 5.9 Landscape Designations to 24 km with Blade Tip ZTV
- Figure 5.10 LANDMAP Geological Landscape Classification
- Figure 5.11 LANDMAP Geological Landscape Evaluation
- Figure 5.12 LANDMAP Landscape Habitat Classification
- Figure 5.13 LANDMAP Landscape Habitat Evaluation
- Figure 5.14 LANDMAP Visual and Sensory Classification within 24 km
- Figure 5.14a LANDMAP Visual and Sensory Classification Key
- Figure 5.15 LANDMAP Visual and Sensory Overall Evaluation with Blade Tip ZTV
- Figure 5.16 LANDMAP Historic Landscape Classification within 24 km
- Figure 5.17 LANDMAP Historic Landscape Overall Evaluation with Blade Tip ZTV
- Figure 5.18 LANDMAP Cultural Landscape Classification within 24 km
- Figure 5.19 Topography Plan to 24 km
- Figure 5.20 Principal Visual Receptors to 24 km Blade Tip ZTV and Viewpoints
- Figure 5.21 Blade Tip ZTV to 24 km (NW Quadrant) with Viewpoints
- Figure 5.22 Blade Tip ZTV to 24 km (SW Quadrant) with Viewpoints
- Figure 5.23 Blade Tip ZTV to 24 km (NE Quadrant) with Viewpoints
- Figure 5.24 Blade Tip ZTV to 24 km (SE Quadrant) with Viewpoints
- Figure 5.25 Hub Height ZTV to 24 km (NW Quadrant) and Viewpoints
- Figure 5.26 Hub Height ZTV to 24 km (SW Quadrant) and Viewpoints
- Figure 5.27 Hub Height ZTV to 24 km (NE Quadrant) and Viewpoints
- Figure 5.28 Hub Height ZTV to 24 km (SE Quadrants) and Viewpoints
- Figure 5.29 Other Wind Farms within 35 km
- Figure 5.30 Other Wind Farms within 24 km
- Figure 5.31 Cumulative ZTV with operational Oakdale Business Park, Rassau Industrial Estate, Pen Bryn Oer
- Figure 5.32 Cumulative ZTV with operational Solutia UK, ANP Newport, Nash Waste Water, G24 Solutions, Tesco Distribution Centre
- Figure 5.33 Cumulative ZTV with consented Pen-Yr-Hoel Farm, Longlands Farm
- Figure 5.34 Cumulative ZTV with in planning Mynydd Carn
- Figure 5.35 Cumulative ZTV with in scoping Mynydd Y Glyn, Twyn Hywel
- Figure 5.36 Cumulative ZTV with in scoping Mynydd Llanhilleth, Abertillery, Manmoel
- Figure 5.37 Viewpoint 1 - Cambrian Way Car Park
- Figure 5.38 Viewpoint 2 - Prescoch Lane
- Figure 5.39 Viewpoint 3 - A4042 Overbridge, New Inn
- Figure 5.40 Viewpoint 4 - Llandegfedd Reservoir
- Figure 5.41 Viewpoint 5 - B4236 Llanfrechfa
- Figure 5.42 Viewpoint 6 - Twmbarlwm
- Figure 5.43 Viewpoint 7 - Ebbw View Terrace, Newbridge
- Figure 5.44 Viewpoint 8 - B4471, Swffryd
- Figure 5.45 Viewpoint 9 - Pen-y-fan Pond Country Park
- Figure 5.46 Viewpoint 10 - St Illtyd
- Figure 5.47 Viewpoint 11 - Cefn Manmoel
- Figure 5.48 Viewpoint 12 - Pen Garn-Bugail Gelligaer Common
- Figure 5.49 Viewpoint 13 - Rhymney Valley Ridgeway Walk Mynydd Bach
- Figure 5.50 Viewpoint 14 - Cefn Eglwysilan
- Figure 5.51 Viewpoint 15 - Mynydd Machen
- Figure 5.52 Viewpoint 16 - Betws, Monnow Way
- Figure 5.53 Viewpoint 17 - Ridgeway, Newport
- Figure 5.54 Viewpoint 18 - Lodge Hill, Caerleon
- Figure 5.55 Viewpoint 19 - Pen-y-cae-mawr
- Figure 5.56 Viewpoint 20 - B4293 Devauden
- Figure 5.57 Viewpoint 21 - Llancayo
- Figure 5.58 Viewpoint 22 - Blorenge
- Figure 5.59 Viewpoint 23 - B4560
- Figure 5.60 Viewpoint 24 - Pen y Fan
- Figure 5.61 Viewpoint 25 - Mynydd Maendy
- Figure 5.62 Viewpoint 26 - Cwmbran Town centre
- Figure 5.63 Viewpoint 27 - Pantygasseg
- Figure 5.64 Viewpoint 28 - Trevethin
- Figure 5.65 Viewpoint 29 - Cefn Fforest Blackwood Showfields
- Figure 5.66 Viewpoint 30 - Mynydd Garn-Wen
- Figure 5.67 Viewpoint 31A - Cambrian Way
- Figure 5.67 Viewpoint 31B - Cambrian Way
- Figure 5.68 Viewpoint 32 - Brookland Terrace play area
- Figure 5.69 Viewpoint 33 - Raglan Castle Tower
- Figure 5.70 Viewpoint 34 - Llanhennock
- Figure 5.71 Viewpoint 35 - Ysgyryd fawr
- Figure 5.72 Viewpoint 36 - Mynydd Coety
- Figure 5.73 Viewpoint 37 - Royal Crescent, Treowen/Treowen Park
- Figure 5.74 BBNP Landscape Character Assessment 35 km
- Figure 5.75 Cumulative ZTV with Scoping Stage Abertillery
- Figure 6.1 Phase 1 Habitat Survey Area
- Figure 6.2a Bat Survey Building Surveyed and Trees Inspected
- Figure 6.2b Bat Survey Building Surveyed and Trees Inspected
- Figure 6.3 Bat Detector Locations
- Figure 6.4 Ponds Surveyed for Great Crested Newt
- Figure 6.5 Dormouse Nest Tube Locations
- Figure 6.6 Otter and Water Vole Survey Area
- Figure 6.7 Statutory Designated Sites within 10km of Site Boundary
- Figure 6.8 Non-statutory Designated Sites within 2km of Site Boundary
- Figure 6.9a Phase 1 Habitat Survey Results
- Figure 6.9b Phase 1 Habitat Survey Results
- Figure 6.9c Phase 1 Habitat Survey Results
- Figure 6.10 Bat Activity
- Figure 6.11 Adder Habitat Quality
- Figure 7.1 VPs, Viewing Arc and Survey Area
- Figure 7.2 Survey Area
- Figure 7.3 Statutory Sites within 10 km of Site Boundary
- Figure 7.4 Raptor Territories CONFIDENTIAL
- Figure 7.5 Nightjar Territories CONFIDENTIAL
- Figure 8.1 Scheduled Monuments and World Heritage Sites within 10km of the Mynydd Maen Wind Farm
- Figure 8.2 Scheduled Monuments and World Heritage Sites within 10km of the Mynydd Maen Wind Farm and in Zone of Theoretical Visibility
- Figure 8.3 Listed Buildings within the Zone of Theoretical Visibility
- Figure 8.4 Conservation Areas and Registered historic Parks and Gardens within 10km of the Mynydd Maen Wind Farm and in Zone of Theoretical Visibility
- Figure 8.5 Glamorgan Gwent Historic Environment Records and National Monument Records within 2km
- Figure 8.6 Glamorgan Gwent Historic Environment Records and national Monument Records within the wind farm boundary
- Figure 8.7 Lidar Data for the wind farm boundary
- Figure 8.8 Potential archaeological sites identified from Lidar Data within the wind farm boundary
- Figure 9.1 Drainage Catchment Areas and Receptors
- Figure 9.2 Bedrock Geology
- Figure 9.3 Peat Depth Plan
- Figure 9.4 Aquifer Bedrock
- Figure 9.5 Aquifer Superficial Deposits
- Figure 10.1 Abnormal Load Delivery Route Overview
- Figure 10.2 Abnormal Load Route from Port to Abercarn Mountain Rd
- Figure 10.3 Abnormal Road Route Abercarn Mountain Road
- Figure 11.1 Mynydd Maen Noise Contour Plot
- Figure 11.2 Cumulative Noise Contour Plot
Environmental Statement Volume 4: Appendices
- Table of Appendices
- Technical Appendix 1.1 EIA Scoping Report (Barton Wilmore)
- Technical Appendix 1.2 EIA Scoping Direction from Planning and Environment Decisions Wales (PEDW)
- Technical Appendix 1.3 Scoping Consultation Summary Table
- Technical Appendix 3.1 Carbon Balance Report
- Technical Appendix 3.2 Geo-environmental Report (Argyll Environmental)
- Technical Appendix 3.3 Outline Construction Environmental Management Plan
- Technical Appendix 3.4 Outline Borrow Pit Management Plan
- Technical Appendix 5.1 Landscape & Visual Impact Assessment Criteria
- Technical Appendix 5.2 Visualisation Information
- Technical Appendix 5.3 Preliminary Assessment of Special Landscape Areas
- Technical Appendix 5.4 Preliminary Assessment of Receptor Groups
- Technical Appendix 5.5 Viewpoint Assessment
- Technical Appendix 5.6 Residential Visual Amenity Assessment
- Technical Appendix 5.6a Figure 1 Residential Properties within 2 km
- Technical Appendix 5.6b Figures 2-20
- Technical Appendix 5.7 Detailed Viewpoint Location Plans
- Technical Appendix 6.1 Planning Policy and Legislation
- Technical Appendix 6.2 Stakeholder Meeting Records
- Technical Appendix 6.3 Survey Tables and Bat Data Analysis Methods
- Technical Appendix 6.4 Phase 1 Habitat Survey Target Notes
- Technical Appendix 6.5 Bat call identification
- Technical Appendix 6.6 Photographs
- Technical Appendix 6.7 Outline Habitat & Ecological Management Plan (updated Nov 25)
- Technical Appendix 7.1a Year 1 Ornithology Baseline Report 2020-21 CONFIDENTIAL
- Technical Appendix 7.1b Year 2 Ornithology Baseline Report 2021-22 CONFIDENTIAL
- Technical Appendix 7.2 Schedule 1 Breeding Information CONFIDENTIAL
- Technical Appendix 7.3 Survey Tables
- Technical Appendix 7.4 Collision Risk Modelling
- Technical Appendix 8.1 Written Scheme of Investigation (WSI)
- Technical Appendix 8.2 Historic Environment Desk Based Assessment
- Technical Appendix 8.3 Historic Environment Desk Based Assessment Appendices
- Technical Appendix 8.4 Historic Environment Desk Based Assessment Figures Part 1
- Technical Appendix 8.4 Historic Environment Desk Based Assessment Figures Part 2
- Technical Appendix 8.4 Historic Environment Desk Based Assessment Figures Part 3
- Technical Appendix 9.1 Sustainable Drainage Management Plan Report
- Technical Appendix 9.2 Coal Mining Risk Assessment
- Technical Appendix 9.2 Coal Mining Risk Assessment Appendices
- Technical Appendix 9.3 Soil and Peat Management Plan
- Technical Appendix 9.4 Watercourse Survey Report
- Technical Appendix 9.5 Ecohydrology Impact Assessment & Remediation on GWDTEs & Peat
- Technical Appendix 10.1 Outline Traffic Management Plan
- Technical Appendix 11.1 Renewable Energy Systems (RES) Publications
- Technical Appendix 11.2 Issues Scoped Out
- Technical Appendix 11.3 Background Noise Survey Locations
- Technical Appendix 11.4 Instrumentation Records
- Technical Appendix 11.5 Derived Background Noise Levels & Limits
- Technical Appendix 11.6 Curtailment Strategies
- Technical Appendix 11.7 Assessment Charts
- Technical Appendix 11.8 Draft Planning Conditions
Design and Access Statement
- Design and Access Statement
- Figure 1.1 Site Location Plan
- Figure 1.2 Planning Application Boundary
- Figure 2.1 Key Constraints and Infrastructure
- Figure 2.2 Turbine Layout
- Figure 2.3 Turbine Layout Evolution
- Figure 3.1 Infrastructure Layout
- Figure 3.2 Typical Wind Turbine Elevation
- Figure 3.3a Typical Wind Turbine Gravity Foundation
- Figure 3.3b Typical Wind Turbine Piled Foundation
- Figure 3.4 Crane Hardstanding General Arrangement
- Figure 3.5 Access Track Typical Details
- Figure 3.6 a, b, c & d Substation Building and Compound
- Figure 3.7 Site Entrance
- Figure 3.8 Typical Temporary Construction Compound
- Figure 3.9 Indicative Borrow Pit Details
- Figure 3.10 Typical Cable Trench Details
- Figure 3.11 Potential Contamination Sources
- Figure 3.12 Substation Welfare Building Wastewater Treatment and Discharge
Planning Statement
Commons Act 2006 Section 16 Application
- Section 16 Commons Act 2006 Draft Application Form
- Figures
- Appendix A
- Appendix B
- Appendix C
- Appendix D
- Appendix E
- Appendix F
- Appendix G
- Appendix H
- Appendix I
Commons Act 2006 Section 38 Application
- Section 38 Commons Act 2006 Draft Application Form
- Figures
- Appendix A
- Appendix B
- Appendix C
- Appendix D
- Appendix E
- Appendix F
- Appendix G
- Appendix H
- Appendix I
Pre-Application Consultation (PAC) Report
- PAC Report
- Acceptance of Notice under Article 6 of the Developments of National Significance (Procedure) (Wales) Order 2016
- Appendix 1
- Appendix 2a
- Appendix 2b
- Appendix 3
- Appendix 4
Green Infrastructure Statement
Supplementary Environmental Information
- Cardiff Airport response - radar mitigation planning condition
- Letter of Address - Radar Mitigation Scheme
- BSG ecology response 1
- RES response letter 1
- Complete list of submission documents
- BSG ecology response 2
- Outline Public Rights of Way Diversion Strategy
- Proposed Public Rights of Way Diversion Figure
- Proposed Temporary Stockpile Storage Areas Figure
- RES response letter 2