plans submitted to remove 3.5km section of overhead power lines
- Proposal to remove 3.5km of existing overhead high voltage electricity line and replace it with underground infrastructure
- Plans developed in partnership with local stakeholders will enhance Dwyryd Estuary landscape
- Submission of planning application follows five years of engagement with local communities, businesses and stakeholders
Our project to remove a 3.5km section of overhead pylon transmission line across the Dwyryd Estuary near the town of Penrhyndeudraeth with the connection placed in a tunnel has moved a step closer, following the submission of a planning application.
We have submitted the application to the Snowdonia National Park Authority and Gwynedd Council.
The proposal also includes the construction of two new tunnel head houses which will give access to the tunnel, along with a sealing end compound at the eastern end, which will connect the cables to the overhead line that will remain.
Since the project first began in 2015, we have worked with local stakeholders to develop its proposals, including the Snowdonia National Park Authority, Gwynedd Council, Cadw, Natural Resources Wales, the National Trust and the town and community councils surrounding the estuary. This included a number of public events over the course of development work and two rounds of public consultation in November 2018 and December 2019.
Full documentation is available to view and download below.
Planning Application
Crynodeb Amgylcheddol – Cymraeg
Environmental Summary – English
Pre-Application Consultation (PAC) Report
Volume One – Technical Chapters 1-19
Chapter 3 Env Appraisal Process
Chapter 6 Landscape & Visual Appraisal
Chapter 8 Archaeology and Cultural Heritage
Chapter 11 Agriculture and Land Use
Chapter 13 Socio-economics and Tourism
Chapter 14 Noise and Vibration
Chapter 15 Marine Physical Processes
Chapter 19 Health in Impact Assesment Signposting
Volume two – Technical appendices
Appendix 3C Embedded Mitigation
Appendix 6.B Landscape Character
Appendix 6C Viewpoint Appraisal
Appendix 6D Aboricultural Report
Appendix 7A – Botanical Report 2019
Appendix 7B Snowdonia Animal Report
Appendix 8B Watching Brief GI Results
Appendix 9A Flood Consequences Assessment
Appendix 10A Relevant Legislation and Policy
Appendix 10B Historic map review
Appendix 14.A Baseline Noise Data (1)
Appendix 14.B Construction Plant
Appendix 14.C Mitigation Options
Appendix 14.D Construction Noise and Vibration Predictions
Appendix 17B – Mar arch geophys review
Volume Three – Figures
Volume Three – Figures
Figure 2.3 – Proposed Garth SEC Compound Elevation
Figure 2.4 – Proposed Garth SEC Compound – Cable Circuit Elevations
Figure 2.5 – Proposed Site Plan Western tunnel Head House
Figure 2.6 – Western Tunnel Head House Building – N & S Elevations
Figure 2.7 – Western Tunnel Head House Building – E & W Elevations
Figure 2.8 – Architectural – Proposed Roof Plan – Garth
Figure 2.9 – Proposed Site Plan Eastern Tunnel Head House
Figure 2.10 – Eastern Tunnel Head House Building – N & S Elevations
Figure 2.11 – Eastern Tunnel Head House Building – E & W Elevations
Figure 2.12 – Cilfor Shaft Site – Construction and Permanent Access Track
Figure 2.13 – Proposed Cilfor SEC Layout
Figure 2.14 – Proposed Cilfor SEC Elevation
Figure 2.15 – Architectural – Proposed Roof Plan – Cilfor
Figure 6.2 ZTV from Above Ground Operational Infrastructure
Figure 6.5 Comparative ZTV of 4ZC027 and 4ZC027R
Figure 6.6 ZTV of Existing Pylons to be Removed
Figure 6.7 Landform and Drainage S1
Figure 6.7 Landform and Drainage S2
Figure 6.9 Settlements and Infrastructure
Figure 6.10 Recreation, Routes and Open Access Land S1
Figure 6.10 Recreation, Routes and Open Access Land S2
Figure 6.11 Landscape Character
Figure 6.12 Seascape Character
Figure 7.1 Statutory & Non Statutory Designated Sites
Figure 7.2 Phase1 Habitat Survey
Figure 8.1 Heritage Constraints
Figure 8.2 Designated Heritage Constraints
Figure 8.3 Historic Landscape Characterisation
Figure 9.1 Snowdonia Main Surface Water Features
Figure 9.2 WFD River Transistional and Coastal Waterbody Status
Figure 9.3 Surface Water Abstractions
Figure 10.2 Superficial Geology
Figure 10.5 Sensitive Receptors
Figure 11.1 Snowdonia Soilscapes
Figure 11.2 Snowdonia Predictive Agricultural Land Classification
Figure 12.1 Highway Link References
Figure 12.2 Construction Traffic Routes
Figure 12.4 Traffic Survey Locations
Figure 12.5 Public Rights of Way
Figure 12.7 Garth Visibility Splays
Figure 12.8 Cilfor Visibility Splays
Figure 13.2 Tourism Hubs & Tourist Attractions
Figure 13.3 Recreational Activities
Figure 14.1 Snowdonia Noise Receptors
Figure 14.3 PDD_33494_OHL_014_P1_WCD
Figure 14.4 PDD_33494_OHL_016_P1_ZC27R_Elevations_
Figure 15-1 Overview Dwryrd Estuary
Figure 15-2 Channel Migration over the Period 1889 to 2009
Figure 16-1 European and National Sites Screened in HRA Stage 1
Figure 17-1 Location of un-named wreck showing 100m archaeological exclusion zone (AEZ)