The East Coast 400kV overhead line (OHL) upgrade is the second part of the phased onshore reinforcement on the East Coast. This onshore reinforcement comprises of works on existing infrastructure in both the SSEN Transmission and Scottish Power Transmission (SPT) area, with the majority of the works in the SSEN Transmission area.

The projected growth in generation capacity within the SSEN Transmission area gives rise to increased north to south power transfer requirements.  In addition to the load driver, an asset condition assessment carried out in 2018 recommends re-conductoring the OHL between Kintore, Fetteresso, Alyth, Tealing and the SSEN Transmission/SPT border.

The East Coast 400kV OHL upgrade project will see 170km of the re-profiled 275kV circuits (following the East Coast 275kV OHL upgrade) upgraded to 400kV operation between Kintore, Fetteresso and Alyth as far as the SSEN Transmission/SPT border

SSEN Transmission has a licence obligation to invest in its existing assets to maintain network health and condition. SSEN Transmission also has a statutory duty under the Electricity Safety, Quality and Continuity Regulations 2002 to ensure that the electricity transmission network is fit for purpose.

On 29 January 2021 we submitted an application to Scottish Ministers for consent under Section 37 of the Electricity Act 1989 for the upgrading of the existing East Coast 275kV OHL to 400kV. We have been working closely with the Energy Consents Unit to ensure that, during the COVID-19 restrictions imposed by the UK and Scottish Governments, the application can be processed formally and in accordance with all relevant Regulations.

Please see below should you wish to view the documents contained within our Section 37 application in full.

Section 37 Covering Letter & Advert

Covering Letter to Energy Consents Unit

Covering Letter to Energy Consents Unit

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Section 37 Advertisement

Section 37 Advertisment

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Section 37 Planning Statement

Section 37 Planning Statement

Planning Statement

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Supporting Documents

Report on Consultation

Report on Consultation

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Habitat Regulations Appraisal

Habitat Regulations Appraisal

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Volume 1 - Non Technical Summary

Volume 1 - Non-Technical Summary

Vol 1 - Non-Technical Summary
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Volume 2 - Main Text

Volume 2 - Main Text

Volume 2 - Main Text
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Volume 3 - Figures

Volume 3 - Figures

Figures Contents

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Figure 1.1 - Location Plan and Overview

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Figure 3.1 - OHL Route and Construction Access Routes 1-5

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Figure 3.1 - OHL Route and Construction Access Routes 6-10

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Figure 3.2 - Tower Extension Locations 1-5

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Figure 3.2 - Tower Extension Locations 6-10

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Figure 3.2 - Tower Extension Locations 11-16

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Figure 5.1 - Cumulative Developments 1-3

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Figure 5.1 - Cumulative Developments 4-6

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Figure 6.1 - Hydrology, Hydrogeology and Soils Baseline Conditions 1-5

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Figure 6.1 - Hydrology, Hydrogeology and Soils Baseline Conditions 6-10

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Figure 7.1 - Designated Sites of Nature Conservation Importance

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Figure 8.1 - Cultural Heritage Asset 1-25

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Figure 8.1 - Cultural Heritage Asset 26-54

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Figure 9.1 - Wet Noise Results - Main OHL

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Figure 9.2 - Wet Noise Results - Bertha Park

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Figure 9.3 - Wet Noise Results - Almond Valley

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Figure 9.4 - Alyth Line Diversion

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Figure 9.5 - Kintore Line Diversion

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Volume 4 - Appendices

Volume 4 - Appendices

Appendix 3.1 Forestry Report

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Appendix 3.2 General Environmental Management Plans

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Appendix 3.3 Species Protection Plans

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Appendix 4.1 Scoping Report (1)

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Appendix 4.1 Scoping Report (2)

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Appendix 4.1 Scoping Report (3)

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Appendix 4.1 Scoping Report (4)

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Appendix 4.1 Scoping Report (5)

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Appendix 4.1 Scoping Report (6)

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Appendix 4.1 Scoping Report (7)

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Appendix 4.2 Scoping Opinion

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Appendix 4.3 Tower Extension Scoping Consultation(1)

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Appendix 4.3 Tower Extension Scoping Consultation(2)

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Appendix 4.3 Tower Extension Scoping Consultation(3)

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Appendix 4.3 Tower Extension Scoping Consultation(4)

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Appendix 4.3 Tower Extension Scoping Consultation(4)

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Appendix 4.4 Gatecheck Report

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Appendix 7.1 - Extended Phase 1 Habitat Survey & Protected Species Survey Report

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Appendix 7.1-Figure 7.1.1 - ExtP1 Results(1)

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Appendix 7.1-Figure 7.1.1 - ExtP1 Results(2)

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Appendix 7.1-Figure 7.1.1 - ExtP1 Results(3)

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Appendix 7.1-Figure 7.1.2 - Otter, WV, Beaver(1)

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Appendix 7.1-Figure 7.1.2 - Otter, WV, Beaver(1)

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Appendix 7.1-Figure 7.1.2 - Otter, WV, Beaver(3)

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Appendix 7.1-Figure 7.1.3 - Bat Roost Habitat Suitability(1)

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Appendix 7.1-Figure 7.1.3 - Bat Roost Habitat Suitability(2)

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Appendix 7.1-Figure 7.1.3 - Bat Roost Habitat Suitability(3)

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Appendix 7.3 - National Vegetation Survey

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Appendix 7.4 - Bird Consultation Results

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Appendix 7.6 - Legislation & Policy

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Appendix 8.1 - Cultural Heritage Gazetteer

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Appendix 8.2 - Assessment of Potential Impacts

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Appendix 9.1 - Derived OHL Noise Data

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Appendix 9.2 - Indoor Noise Reference

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Appendix 9.3 - Baseline Noise Measurements

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Appendix 9.4 - External BS 4142 2014 and TR(T)94 Assessment - Full Totara Line

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Appendix 9.5 - Indoor Noise Assessment - Full Totara Line

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Appendix 9.6 - OHL Hybrid Design and Residual Effect

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EC400 - Volume 4 - Technical Appendices Contents

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