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Proposed New Substation, Bryncir, Gwynedd Planning Statement

Proposed New Substation at Bryncir

Planning Statement

July 2017


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Document Control

Document Properties

Organisation National Grid Electricity Transmission (UK)

Author Kate Gapper

Approved by Gavin Crook and Jacqui Fenn

Title Planning Statement

Document Reference

Version History

Date Version Status Description/Changes

07/03/2017 1 Draft Working Draft

22/03/2017 2 Draft AK Review

12/07/2017 3 Final


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CONTENTS 1 INTRODUCTION...................................................................................................... 1 1.1 Purpose of this Report ............................................................................................. 1

2 PROJECT BACKGROUND ..................................................................................... 3 2.1 The UK Energy Challenge ........................................................................................ 3

2.2 The North Wales Transmission System ................................................................... 3

2.3 Project Need ............................................................................................................ 4

2.4 National Grid Duties and Policies ............................................................................ 6

3 PROJECT DESCRIPTION ..................................................................................... 11 3.1 The Application Site and Surrounding Area ............................................................ 11

3.2 The Proposed Substation Compound..................................................................... 12

3.3 Replacement of Existing Pylon ............................................................................... 17

3.4 PROW Proposals ................................................................................................... 18

4 PLANNING POLICY .............................................................................................. 19 4.1 Introduction ............................................................................................................ 19

4.2 Planning Policy Wales ............................................................................................ 19

4.3 The Gwynedd Unitary Development Plan ............................................................... 21

4.4 The Emerging JLDP ............................................................................................... 27

5 CONCLUSIONS .................................................................................................... 33


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1

1 INTRODUCTION

1.1 Purpose of the Report

1.1.1 This Planning Statement has been prepared to accompany a planning application by

National Grid Electricity Transmission (UK), herein referred to as NGET, for the

construction of a new electricity substation with associated infrastructure on land

south of Bryncir, Gwynedd.

1.1.2 A pre-application screening opinion under Regulation 5 (1) of the Town and Country

Planning (Environmental Impact Assessment) (Wales) Regulations 2016, for the

proposed substation, was sought from Gwynedd Council. The Council confirmed in

writing on the 8th February 2017 that an EIA was not required.

1.1.3 Notwithstanding this, as a Transmission Licence Holder under the Electricity Act

1989, NGET must comply with Schedule 9 of the Act which requires the environment

to be considered and effects on the environment to be mitigated. NGET has

accordingly undertaken a non-statutory environmental appraisal of the proposed

substation. The results of the environmental appraisal are set out in the

Environmental Report (ER) which accompanies this application.

1.1.4 The purpose of this Planning Statement is to provide the reader with a detailed

understanding of the proposed development and why it is needed. It also provides an

evaluation of the proposed development against national and local planning policies

and considers the implications of the proposal on the surrounding area.

1.1.5 This Planning Statement draws upon the conclusions of the technical documents

supporting the planning application and should therefore be read in conjunction with

all other elements of the submission including the application forms and associated

plans, design and access statement, environmental report, transport statement,

ecology report and tree report.

1.1.6 The remainder of this Planning Statement is structured as follows:

• Section 2: Project Background – outlines the need for the project.

• Section 3: Proposed Development – provides a detailed description of the

proposed development.

• Section 4: Planning Policy Context – provides the context of the national and

local planning policy relevant to the proposed development and summarises

how the proposed development meets the requirements of planning policy.

• Section 5: Conclusion.


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2 PROJECT BACKGROUND

2.1 The UK Energy Challenge

2.1.1 The UK is facing a major challenge to meet projected energy needs over the coming

decades, while at the same time tackling climate change. A significant challenge for

NGET and the UK energy industry is to deliver low carbon energy in an affordable,

secure and sustainable way. This is a challenge that will require an estimated £110

billion of investment in electricity generation and transmission up to 2020 to transform

the UK’s energy infrastructure.

2.1.2 Peak demand for electricity (the largest amount of electricity used at peak time on a

cold day) in Great Britain is currently over 60 gigawatts (GW), while in a year around

325 billion units of electricity, with a value of around £30 billion, are generated and

consumed.

2.1.3 The majority of electricity is generated by burning gas or coal and by nuclear power

stations. However, by 2016, 12 GW of coal-fired power stations will close as they

cannot meet the requirements of European emissions legislation. At the same time,

around 7.5 GW of nuclear capacity will come to the end of its life. This means a huge

investment in new generating capacity is needed to replace them and meet future

electricity demand.

2.1.4 At the same time, North Sea oil and gas are in decline, so Britain's gas-fired power

stations are becoming increasingly dependent on imports. Even if existing coal-fired

power stations could meet EU emissions legislation, the domestic coal industry is no

longer the major force it once was. Britain is therefore no longer self-sufficient in

energy and increasingly reliant on imports. The movements in global energy markets

have underlined concerns about the price and security of future electricity supplies.

2.1.5 The UK energy market needs electricity from renewable sources such as wind power,

and also from nuclear power, to help tackle climate change and enable the country to

meet its national and international obligations. The introduction of new wind and

nuclear power generation over the next few years will require a reinforcement and

extension of the existing electricity transmission system.

2.2 North Wales Transmission System

2.2.1 The electricity transmission system in North Wales was developed in the 1960s to

connect new sources of power generation. Today, electricity generation in North

Wales is conveyed to the main interconnected transmission system in England and

Wales via three 400kV transmission lines:


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• Wylfa to Pentir (across Anglesey and Menai Strait);

• Pentir to Connahs Quay (running parallel to the North Wales coast); and

• Pentir to Trawsfynydd and Trawsfynydd to Connahs Quay / Legacy (Wrexham).

2.2.2 All of the overhead lines carry two transmission circuits, with the exception of the route

between Pentir and Trawsfynydd which carries a single transmission circuit, limiting

the transmission capacity of the whole North Wales area. This capacity is further

limited by the three underground transmission cables that cross the Glaslyn Estuary

at Porthmadog.

2.3 Project Need

2.3.1 A new nuclear power station (2800 Megawatts (MW)) is proposed to be built at Wylfa

Newydd, on the Isle of Anglesey by Horizon Nuclear Power. The existing overhead

line (OHL) between Wylfa and the mainland does not have sufficient capacity to be

securely used to carry all the electricity that would be generated by the new nuclear

power station.

2.3.2 NGET is therefore proposing to develop a new electricity transmission line between

Wylfa and NGET’s existing substation at Pentir and will be submitting an application

for a Development Consent Order (DCO) under the Planning Act 2008 for this new

connection.

2.3.3 In addition to the Wylfa Newydd project, NGET is also currently contracted to connect

a number of other proposed new power generators including:

• Orthios Power: an Eco Park and 299 Megawatt (MW) biomass-fuelled

combined heat and power station located in Penhros, Holyhead, Anglesey

connecting at Penrhos (Wylfa 132 kilo Volt (kV) substation) by 2020;

• Greenwire: a 1000 MW wind farm located in the Irish Midlands, which will

connect at Pentir 400 kV substation by 2020;

• Codling Park: a 1000 MW offshore wind farm off the east coast of Ireland, which

will connect at Pentir 400 kV substation by 2021; and

• A wind farm, which has been consented, off the north coast of Wales in

Liverpool Bay (‘Burbo Bank Extension’) which would connect at the recently

constructed Bodelwyddan Substation.


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2.3.4 NGET’s technical analysis has demonstrated that there is insufficient transmission

capacity in the existing electricity transmission network in North Wales to connect this

level of generation in a reliable way. Accordingly works are required to increase the

capacity of the transmission network to export power from North Wales.

2.3.5 In order to strengthen NGET’s existing electricity network between Pentir substations

and Trawsfynydd substations, to ensure that all the proposed new power generation in

North Wales can be accommodated, and also to maintain the Scottish Power Manweb

plc, known herein as SP Manweb, (the local Distribution Network Operator (DNO) in

North Wales) distribution supply, NGET and SP Manweb have considered the most

appropriate means by which both can be achieved.

2.3.6 It has been established that the following works are needed:

• New 400 kV substation at Bryncir;

• New connection between the new Bryncir substation and the existing 132 kV

OHL and removal of a section of existing 132 kV OHL between the existing 4ZC

and the new connection;

• Replacement of one existing pylon at Bryncir to connect to the new substation;

• Upgrading / replacement of cables at the Glaslyn Estuary;

• Upgrades to the existing Cable Sealing End Compounds (CSECs) at Wern and

Y Garth;

• Extension within the existing substation boundary at Trawsfynydd substation;

and

• Reconductoring of one circuit on the existing OHL (4ZC) between Penisa’r

Waun and Trawsfynydd Substation.

2.3.7 These works will be consented, where appropriate, under the Town and Country

Planning Act 1990 (as amended) or Section 37 of the Electricity Act 1989 and will be

supported by the appropriate level of environmental assessment. This Planning

Statement, however, relates only to the proposed development of the new 400 kV

substation at Bryncir.

2.3.8 The existing overhead transmission line between Pentir and Trawsfynydd

currently carries only one transmission circuit, but has the capacity to carry two

without the need for substantive works to the line. The establishment of a second

transmission circuit on the route would provide the additional transmission capacity

required in North Wales. NGET’s policy is to utilise the capacity of existing

transmission routes before seeking to establish new routes.


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2.3.9 Currently one of the two circuits on the OHL between Pentir and Trawsfynydd is

operated at 132 kV by SP Manweb as part of their distribution network. This carries

power from Trawsfynydd to a point south of Bryncir. From here it continues to Four

Crosses substation on a 132kV overhead line, supplying electricity consumers across

the Llyn Peninsula.

2.3.10 In order to establish a second transmission circuit between Pentir and Trawsfynydd

SP Manweb’s 132kV circuit needs to be removed from the line. Rather than establish

a replacement 132kV route from Trawsfynydd NGET and SP Manweb have

concluded that the establishment of a new substation in the Bryncir area would

provide a more appropriate solution. The function of this new substation will be to take

power from the existing Pentir - Trawsfynydd 400 kV OHL, transform it to a voltage of

132 kV, and connect this to the existing 132 kV OHL circuit that runs to the SP

Manweb 132 kV substation at Four Crosses. The power for the Four Crosses

substation would therefore be provided from the new substation rather than from

Trawsfynydd substation as at present, allowing the then redundant 132 kV circuit from

Trawsfynydd to be replaced with the second 400 kV circuit.

2.3.11 In 2012, NGET undertook a design and appraisal process for the proposed new

substation and identified a shortlist of siting options, the Northern, Southern and

Central Options at Bryncir. The findings of this appraisal are set out in National Grid's

published 'West Gwynedd Substation Initial Site Identification Report’ (October 2012).

Consultations with the public were undertaken on the three options which revealed

that the Central and Southern options were the better options from the public

perspective.

2.3.12 Further review of the shortlisted siting options was undertaken in June 2016. The

Southern Option was taken forward as the preferred location, based on public

feedback, a review of the lands and technical aspects of the requirements for the site

and the connection to the electricity transmission systems. As a result of

supplementary feedback, further appraisal, and discussions with affected

landowners, NGET identified the application site as being the preferred location for

the new substation.

2.3.13 NGET is therefore seeking planning consent for the development of the new Bryncir

substation under the Town and Country Planning Act 1990 (as amended).

2.4 National Grid Duties and Policies

2.4.1 In addition to generic legislative requirements, policy and guidance, National Grid

takes into account its statutory duties and its own policies and guidance when

establishing sites for new substations.


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Licence Requirements

2.4.2 In order to facilitate competition, National Grid has a duty to connect electricity

generators to the transmission network. This is set out in Licence Condition C8

(Requirement to offer terms) of National Grid’s transmission licence. The form of the

connection is determined by National Grid in discussion with its customers. While it

has a duty to connect the generators to the transmission network, National Grid has

no control over where the electricity generators choose to develop.

Duty to Protect the Environment

2.4.3 Under Section 38 and Schedule 9 of the Electricity Act 1989, National Grid has a duty

to:

"have regard to the desirability of preserving natural beauty, of conserving flora, fauna and geological or physiographical features of special interest and of protecting sites, buildings and objects of architectural, historic or archaeological interest; and shall do what it reasonably can to mitigate any effect which the proposals would have on the natural beauty of the countryside or on such flora, fauna, features, sites, buildings or objects."

2.4.4 Transmission and distribution licence holders are also required under Schedule 9 of

the Act to produce and publish a statement setting out how they propose to perform

this duty generally.

2.4.5 National Grid’s Stakeholder, Community and Amenity Policy sets out how National

Grid will meet its amenity duties and community and stakeholder engagement duties

under the Electricity Act. The Policy identifies ten commitments made when

undertaking electricity works in the UK (refer to Appendix C).

2.4.6 National Grid, as statutory undertaker, also has responsibilities with regards to

National Parks, Areas of Outstanding Natural Beauty (AONBs) and Sites of Special

Scientific Interest (SSSI) under the following legislation:

• National Parks - Section 11A(2) of the National Parks and Access to the

Countryside Act 1949;

• AONBs - Section 85 of the Countryside and Rights of Way Act 2000; and

• SSSIs - Section 28G of the Wildlife and Countryside Act 1981.


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Economic Duties

2.4.7 National Grid is required under Section 9 of the Electricity Act 1989 to “…develop and

maintain an efficient, co-ordinated and economical electricity transmission system,

and to facilitate competition in the supply and generation of electricity”. National Grid

is regulated by Ofgem, the electricity and gas market’s regulator, to ensure value for

money for customers and it must satisfy the various statutory duties.

National Grid Guidance on Substations and the Environment: Guidelines on Siting and Design

2.4.8 National Grid Guidance on Substation and the Environment: Guidelines on Siting and

Design set out National Grid’s approach to siting and designing substations. This

guidance recognises the importance of protecting the environment when designing

new substations.

2.4.9 Section III of the guidelines sets out the following key points:

• The siting of new National Grid substations, sealing end compounds and line

entries should as far as reasonably practicable seek to avoid altogether

internationally and nationally designated areas of the highest amenity, cultural

or scientific value by the overall planning of the system connections;

• Areas of local amenity value, important existing habitats and landscape

features including ancient woodland, historic hedgerows, surface and ground

water courses and nature conservation areas should be protected as far as

reasonably practicable;

• The siting of substations, extensions and associated proposals should take

advantage of the screening provided by the land form and existing features

and the potential use of site layout and levels to keep intrusion into

surrounding areas to a reasonably practicable minimum;

• The proposals should keep the visual, noise and other environmental effects

to a reasonably practicable minimum;

• The land use effects of the proposals should be considered when planning the

siting of substations or extensions;

• In the design of new substations or line entries, early consideration should be

given to the options available for terminal towers, equipment, buildings and

ancillary development appropriate to individual locations, seeking to keep

effects to a reasonably practicable minimum;

• Space should be used effectively to limit the area required for development

consistent with appropriate mitigation measures and to minimise the adverse

effects on existing land use and rights of way, whilst also having regard to

future extension of the substation;


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• The design of access roads, perimeter fencing, earthshaping, planting and

ancillary development should form an integral part of the site layout and design

to fit in with the surroundings;

• In open landscape especially, high voltage line entries should be kept, as far

as possible, visually separate from low voltage lines and other overhead lines

so as to avoid a confusing appearance; and

• The inter-relationship between towers and substations structures and

background and foreground features should be studied to reduce the

prominence of structures from main viewpoints. Where practicable the

exposure of terminal towers on prominent ridges should be minimised by siting

towers against a background of trees rather than open skylines.


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3 PROJECT DESCRIPTION 3.1 The Application Site and Surrounding Area

3.1.1 Drawing No. PDD-30311-1S-LAY-017 identifies the location of the proposed

substation which is to the south-east of Bryncir, south of the A487 and to the east of

the junction with the B4411, Gwynedd (Grid Reference SH 485 430). The red line

boundary covers an area of approximately 4.3 hectares (ha); however, the permanent

substation compound will cover approximately 0.7 ha. The remainder of the land

within the red line boundary comprises the access road, vehicle turning area,

landscaping and temporary construction/laydown areas.

3.1.2 The area within which the proposed development site is located consists of a series of

open fields on the eastern side of the existing 400 kV OHL, approximately 1.4

kilometres (km) south of Bryncir and 1.4km west of Garndolbenmaen. The A487 is

located 250 metres (m) to the north-east and the B4411 and the Afon Dwyfach is 450m

to the north-west. Its primary use is agricultural and the Agricultural Land Classification

(ALC) data identifies this area as Grade 4 agricultural land (poor quality).

3.1.3 The proposed development site lies at approximately 95m Above Ordnance Datum

(AOD) on relatively flat ground and consists of pastoral fields with an area of marshy

grassland located to the south-west. The site is surrounded by a mix of field boundary

types, being predominantly dry stone wall and post and wire fences, but with

overgrown hedgerows/hedgerow trees located along the southern boundary and

along the north-eastern boundary. Managed hedgerows line the southern boundary

of the A487 as it faces the proposed development site.

3.1.4 The existing Pentir - Trawsfynydd 400 kV OHL runs along the western edge of the

proposed development site and the pylons are visible from many views in the vicinity

of the site and from elevated areas, including from the Snowdonia National Park to the

north-east.

3.1.5 There are a number of isolated properties in the vicinity of the proposed development

site; a small group is located close to the junction of the B4411 and the A487,

approximately 500 m north-west of the site.

3.1.6 The site is accessed from the north via an existing farm access off the A487, which

runs in a broadly east-west orientation. The B4411 runs in a broadly north-south

orientation approximately 400 m to the west of the proposed development site and a

local road passes approximately 875 m to the east, connecting the A487 to the B4411.


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3.1.7 A Public Right of Way (PRoW, Footpath 18 Dolbenmaen) currently runs through the

proposed development site and will need to be permanently diverted to facilitate the

proposed substation. This is discussed in more detail at section 3.4.

3.2 The Proposed 400kv Substation Compound

3.2.1 A secure compound is required to accommodate the single electrical transformer that

would ‘step down’ the 400kV voltage of the Pentir – Trawsfynydd circuit to a voltage

of 132 kV, ready for connection to SP Manweb Four Crosses circuit.

3.2.2 The compound footprint dimensions are approximately 88 x 63 metres and will be

surfaced with stone chippings. Under normal operating conditions the site will be

unmanned. Visual checks will be undertaken on a monthly inspection visit to the site.

Whilst external lighting will be installed at the substation for emergency work during

hours of darkness, the substation will not normally be lit.

3.2.3 The principal components of the proposed substation are shown on the applications

plans and Table 3.1 on the next page lists the equipment to be installed at the

substation.


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Table 3.1: Equipment to be Installed at Bryncir Substation Component Description

Ancillary Buildings A small single story amenities building and small single story building housing the main control systems.

Busbars and Air Insulated

Switch Gear (AIS)

1x400kV and 1x132kV)

Busbars are similar in appearance to scaffolding poles, and carry electrical power around the substation to various equipment.

Earth Switches (9 x 400kV and 9 x 132kV)

An earth switch enables safe maintenance of the substation equipment.

Disconnectors

(3 x 400kV & 3 x 132kV)

A disconnector provides an electrical break between the circuits.

Circuit Breakers (3 x 400kV and 3 x 132kV)

A circuit breaker provides a high-speed method of isolating circuit components in the event of a fault on the transmission or distribution networks.

Cable Sealing Ends (x3) Used to connect the 132kV underground cable onto the substation busbars.

Current Transformers (x6) Converts system current to levels which can be safely measured by control and protection equipment. They are positioned so that no part of the network is left unmonitored by protection systems

Settlement Metering (x3) Provides a measurement of the power transferred from NGET to SP Manweb at Bryncir.

Diesel Generator Provides standby LVAC supplies in event of a power failure.

Gantry A structure, up to 10.5m in height, which supports electrical conductors as they transition from an overhead line pylon to busbars and equipment within a substation.

LVAC Transformer Site electrical 230 V supplies.

Super Grid Transformer

(1 X 400/132 kV)

Required to change line voltage to a higher or lower level and regulate the voltage.

Surge Arresters

(3 x 400 kV & 3 x 132 kV)

A Surge Arrester provides a path to earth when triggered by an abnormal voltage condition (e.g. lightning strike) to protect key equipment.

Voltage Transformers

(3 x 400kV & 4 x 132kV)

Converts system voltage to levels which can be safely measured by control and protection.

Water Tank Water source for fire fighting

Oil Interceptor Separates water from contaminates such as oil, grease and sediment.

Access Road and

HGV Turning Area

Access to the site would be from the A487 using an upgraded existing access point located opposite Bryn-yr-efail-uchaf, before following field boundaries to the substation compound. The permanent access track would be approximately 550m long with a maximum width of 6m and would have a tarmacadam surface. In addition, a hardstanding area, immediately adjacent to the south of the compound would be required to accommodate vehicle turning.

Security Fencing 2.4m high palisade fencing with an electric fence backing of 3.4m height from ground level.


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Construction

3.2.4 The construction of the proposed substation is planned to be undertaken over a

period of approximately 18 to 20 months from Q1 2020 to Q3 2021 to coordinate the

sequence of works with the proposed connection from Wylfa to Pentir. This, however,

this is subject to change if required by customer connections. Construction will occur

in phases which will include the activities summarised below.

Table 3.2: Outline Construction Programme

Construction Phases 2020 2021

Q1 Q2 Q3 Q4 Q1 Q2 Q3 Q4

Preliminary Works

Site Establishment

Civil Engineering Works

Mechanical/Electrical works

Commissioning

Site Reinstatement & Landscape Works

3.2.5 Within each of the phases outlined above a number of activities will be undertaken

including:

• Initial works: Further site surveys required to be undertaken in advance of

construction;

• Site Establishment: This will include vegetation clearance, development of the

site access and establishment of temporary facilities including site offices,

laydown and storage areas and welfare facilities, development of electricity and

water supplies and erection of security fencing or hoarding;

• Earthworks and Civil Engineering Works: This will include site levelling,

construction of building foundations, foundations for outdoor equipment

development of the site’s permanent drainage system and construction of

permanent access, internal roads and car parking arrangements;


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• Mechanical and electrical work: This will include the erection of buildings and

outdoor electrical equipment;

• Commissioning: Following completion of all construction works there will be a

period of commissioning and testing; and

• Site Reinstatement and Landscape Works: This will include removal of site

offices and temporary facilities, land reinstatement and landscape works.

Construction Access Arrangements

3.2.6 Prior to the main construction works, access to the site will be constructed off the

A487. During construction, a range of vehicles will be accessing the site including

concrete lorries, Heavy Good Vehicles (HGVs), articulated lorries and one Abnormal

Indivisible Load (AIL) carrying the transformer.

General Construction Information

3.2.7 The initial preparatory works would comprise the temporary removal and storage of

topsoil and the installation of a temporary stone capping in the substation construction

area to provide a clean and stable working platform. If possible, the permanent site

boundary perimeter fencing would be completed early in the construction programme

to secure the construction area. Electrification of the fence would take place as the

substation is fitted out with lighting and power. Where required, excavations, piling

and concrete foundations would be provided for the substation electrical equipment.

An earth grid would be installed below the ground to create an ‘earth mat’ to make

the compound electrically safe. The substation support structures and electrical

equipment then would be erected.

3.2.8 Prior to the substation being brought into service, commissioning tests would be

required, starting with testing the individual items of plant and culminating with testing

the installed system as a whole. Following successful testing, the substation would

be connected to the electricity transmission system.

Construction Site Layout 3.2.9 A temporary construction compound would be established to the north west of the

proposed substation works, within the red line boundary, to allow for the safe

construction of the substation. The construction site will be securely fenced off during

the construction period. During the construction period, there will be a requirement

for a number of temporary facilities including:


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• Site offices including offices and meeting rooms;

• Staff welfare facilities including toilets, kitchen and mess room;

• Storage areas for construction vehicles, plant, equipment, materials and (where

required) for storage of waste items to be removed; and

• Appropriately bunded areas to be used for the storage of oils, other fuels and

waste material, where required.

Site Environmental Management

3.2.10 During installation, the appointed Contractor will be required to operate under a

detailed site specific Construction Environmental Management Plan (CEMP). It will,

as a minimum, implement the mitigation measures identified within the Environmental

Report. The CEMP will set out a variety of control measures for managing the

potential environmental effects of construction works including control and

management of noise, dust, surface water runoff, waste and pollution control and set

out responsibilities for the preparation and implementation of the plan.

Construction Waste and Spoil

3.2.11 Subject to geotechnical testing, excavated materials will be re-used on site wherever

possible. Where waste materials are to be disposed of off-site this will be at licensed

waste disposal facilities in accordance with a Site Waste Management Plan (SWMP).

Operation and Maintenance

3.2.12 The substation would typically be unmanned. Maintenance of the substation would

be undertaken approximately every three years, involving electrical isolation of

equipment before it is worked on. Visual checks would be undertaken on a monthly

inspection visit to the site. If the substation required refurbishment or replacement

works, vehicles would be used to carry workers in and out of the site and suitable

vehicles would be used to bring new materials and equipment to site and remove old

equipment.

Permanent Access

3.2.13 The construction access will be made into permanent access with a bell mouth wide

enough for two cars and a road (black top tarmac) up to 6 m in width.

Staffing & Employment

3.2.14 The number of staff on site will vary according to the construction phase and activities

being undertaken.


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Hours of Working

3.2.15 Generally, installation activities will be undertaken during daytime periods only, from

Monday to Friday 7am-7pm (including an hour start up and hour shut down). No bank

holiday or weekend working will be undertaken, unless by agreement with the Local

Planning Authority. There may be some periods of extended or 24 hour working for

example oil filling. These would be by agreement with the Local Planning Authority.

Electric and Magnetic Fields

3.2.16 All equipment that generates, distributes or uses electricity produces electric and

magnetic fields (EMFs). A separate EMF report has been produced which sets out

the technical specifications of the proposed substation and how the development

complies with EMF exposure guidelines.

Decommissioning

3.2.17 The lifespan of the equipment within the proposed substation is approximately 40

years. However, the substation forms part of the national electricity transmission

network which feed power supply into the local community and therefore is likely to

continue to be required. If its useful life has expired and is to be removed, the

equipment would be safely disconnected from the transmission system and carefully

dismantled. Much of the material of the substation would be taken for recycling.

Similar methods and equipment would be required for dismantling as for construction.

3.2.18 Potential effects associated with the decommissioning phase of the proposed

substation are less definitive given the uncertainty of future baseline conditions and

when the decommissioning will take place. However, the decommissioning effects

would broadly be the same as construction effects due to the similar methods and

equipment required, providing an appropriate level of mitigation is undertaken during

the decommissioning of the proposed substation.

3.3 Replacement of Existing Pylon

3.3.1 As mentioned earlier, the works at Bryncir also necessitate the replacement of an

existing pylon on the line with a new one as it enters the substation. The proposal to

replace the existing pylon with a tension pylon is exempt from Section 37(1) of the

Electricity Act 1989 as set out within Part 3(e) of the Overhead Lines (Exemption)

(England and Wales) Regulations 2009. This is because the height of the replacement

pylon does not exceed the height of the existing pylon which is being replaced by

more than 10% and because the replacement pylon will be sited within the line

between two existing pylons, 25m to the north of the existing pylon.


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3.3.2 As the works are exempt from consent under the Electricity Act they constitute

permitted Development under Part 17, Class G(a) of the Town and Country Planning

(General Permitted Development) Order (England and Wales) 1995 (the GPDO). The

Council confirmed in writing on the 8th February 2017 that the proposed replacement

pylon works would not give rise to any significant environmental effects and therefore

planning permission is not required for this element of the proposal. Accordingly,

whilst the proposed replacement pylon is shown on the application plans, it does not

form part of this planning application hence it falls outside the red line boundary.

3.4 PROW Proposals

3.4.1 As explained earlier a Public Right of Way (PRoW, Footpath 18 Dolbenmaen) currently

runs through the proposed development site and will need to be permanently diverted

to facilitate the proposed substation. The application for the permanent diversion will

be made via a separate application under Section 257 of the Town and Country

Planning Act (1990).

3.4.2 NGET has consulted with GCC PRoW Officers regarding the temporary closure and

permanent diversion of FP 18, resulting in an agreement in principal to the diversion

route and proposals.

3.4.3 It has been agreed that the majority of Footpath 18 (FP1 8) route will remain

unchanged, with access and termination points remaining as present, with minimal

difference in walking distance as a result of the proposed diversion. The diversion will,

however, involve the following changes to FP 18 in the vicinity of the proposed site:

• From the site access junction on the A487 to the northern site location

boundary, a hard-standing (tarmacadam) route along the access road will be

provided;

• FP 18 will divert in a westerly direction running on the northern side of the

existing dry-stone wall at the field edge, parallel with the northern site

boundary at the main site access point;

• The route will run alongside the western edge of the existing dry-stone field

boundary in the adjacent field (c.5m from all field boundaries); and

• Four ‘Kissing Gates’ will be provided for user access to the diverted section of

FP 18.


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4 PLANNING POLICY

4.1 Introduction 4.1.1 In assessing the acceptability of the proposals in planning and environmental terms,

consideration has been given to both national planning policy and development plan

policies. In doing so this chapter analyses the compatibility or otherwise of the

proposal with those policies and confirms the ‘planning case’ for the proposal.

4.2 Planning Policy Wales (November 2016)

4.2.1 National planning policy in Wales consists of Planning Policy Wales (Edition 9,

November 2016), which is supplemented by a series of Technical Advice Notes

(TANs). Planning Policy Wales and the TANs, together with circulars and policy

clarification letters, form the national planning policy in Wales.

4.2.2 Paragraph 1.4.4 of PPW9 notes that the planning system will play an important role

in tackling climate change and reducing greenhouse gas emissions in accordance

with the Climate Change Act 2008.

4.2.3 Paragraph 2.14.1 deals with the issue of emerging or outdated plans and advises

that the weight to be attached to an emerging LDP when determining planning

applications will in general depend on the stage it has reached, but does not simply

increase as the plan progresses towards adoption. PPW goes onto advise that

certainty regarding the content of the plan will only be achieved when the Inspector

delivers the binding report.

4.2.4 Paragraph 4.4.3 of Planning Policy Wales states that planning policies and

proposals should “…support the need to tackle the causes of climate change by moving towards a low carbon economy. This includes facilitating development that reduces emissions of greenhouse gases in a sustainable manner, provides for renewable and low carbon energy sources at all scales and facilitates low and zero carbon developments.”

4.2.5 The Welsh Government’s objectives are to promote the generation and use of

energy from renewable and low carbon energy sources for all developments in order

to meet national targets.

4.2.6 Chapter 5 of PPW refers to the importance of nature conservation, natural heritage

and the protection of statutory designated sites when considering proposals for

development.


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4.2.7 It is stated at paragraph 5.1.3 that ‘a key role of the planning system is to ensure that society’s land requirements are met in ways that do not impose unnecessary constraints on development whilst ensuring all reasonable steps are taken to safeguard or enhance the environment’.

4.2.8 PPW considers that the effect of a development proposal on the wildlife or

landscape of any area can be a material consideration and, in order to achieve

sustainable development, it is necessary to balance conservation objectives with

the wider economic needs of local businesses and communities (paragraph 5.5.1

refers).

4.2.9 Chapter 8 of PPW focuses on extending mode choice in transport and to secure

accessibility in a way which supports sustainable development and helps to tackle

the causes of climate change by: “encouraging a more effective and efficient

transport system, with greater use of the more sustainable and healthy forms of

travel, and minimising the need to travel”.

4.2.10 The proposed development is expected to improve accessibility in the local area by

providing improvements to Footpath 18 and by “supporting sustainable options for

freight and commerce, necessary infrastructure improvements and by ensuring that,

as far as possible, transport infrastructure does not contribute to land take…” in line

with the PPW.

4.2.11 Chapter 12 provides guidance on infrastructure and services and confirms that

adequate and efficient infrastructure is crucial for the economic, social and

environmental sustainability of all parts of Wales (paragraph 12.1.1). It underpins

economic competitiveness and opportunities for households and businesses to

achieve more socially and environmentally desirable ways of living and working.

4.2.12 Paragraph 12.1.4 confirms that new approaches to infrastructure will be needed in

light of the consequences of climate change. The objectives of the Welsh

Government therefore include: to promote the generation and use of energy from

renewable and low carbon energy sources at all scales and promote energy

efficiency, especially as a means to secure zero or low carbon developments and

to tackle the causes of climate change;. Planning authorities should take the

capacity of existing infrastructure into account when considering planning

applications and, in general, seek to maximise the use of existing infrastructure and

consider how the provision of different types of infrastructure can be co-ordinated

(paragraph 12.1.6).


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4.3 The Gwynedd Unitary Development Plan (UDP) 2001 – 2016

4.3.1 The planning policy functions of the Isle of Anglesey County Council and Gwynedd

Council are combined and co-ordinated through the Joint Planning Policy Unit (JPPU).

Some of the current development plan documents which contribute to the local policy

framework pre-date the establishment of the JPPU in 2010 while others, specifically

the Joint Local Development Plan (JLDP), are in development.

4.3.2 The current adopted development plan for the Gwynedd local planning authority area

is the Gwynedd Unitary Development Plan (UDP) 2001 - 2016, which the Council

formally adopted in 2009.

4.3.3 The application site is shown on the UDP Proposals Map as white land, that is land

that is not allocated/projected for any particular use. It is also shown as being located

outside any defined settlement boundaries.

4.3.4 There are no policies which deal specifically with substations, however, the policies

set out in Table 4.1 on the next page are relevant to the consideration of this

application.


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Table 4.1: Summary of UDP Policies Policy Policy Summary Assessment of Policy Strategic Policy 2

The Natural Environment This policy deals with the natural environment and advises that the area’s natural environment and its landscape character, and views in and out of the Snowdonia National Park and the Llŷn and Anglesey Areas of Outstanding Natural Beauty, will be safeguarded, maintained or improved by refusing development proposals that will significantly harm them.

As explained in the landscape and visual chapter of the Environmental Report (ER), in view of the distance of the proposed substation from the Snowdonia National Park boundary and its limited perceptibility the proposals are not considered to have a significant effect. The ER further advises that whilst the proposed substation is located within the setting of the National Park, its characteristics do not go against the existing character of the wider landscape and its effects are therefore considered to be not significant.

Strategic Policy 4

Design Standards Development will be expected to be of a good design in order to ensure that it makes a positive contribution, wherever possible, to the landscape, built environment and sustainable development.

Whilst the design of the proposed development is constrained by technical and operational requirements which limits the choices in terms of physical appearance, NGET has adopted established design principles which assist in minimising landscape and visual effects. Furthermore, as part of the design process, assessments of the impact of the proposed development have been undertaken to ensure its effects are as low as possible and avoid severe adverse effects.

Strategic Policy 5

Developments Which Create Risk This policy explains that developments that are inconsistent with the need to safeguard floodplains or to minimise flood risk and developments that create a risk of unacceptable damage to health, property or the environment, will be refused.

As set out in the ER (Chapter 8 – Water Quality Resources and Flood Risk) the application site is not at risk of fluvial flooding from the Afon Dwyfach and is located entirely within Flood Zone 1. The ER concludes that with mitigation in place no significant surface water quality,

hydrology and flood risk effects are anticipated.

Strategic Policy 9

Energy This policy advises that development proposals which provide energy from renewable sources will be approved provided they do not significantly harm the environment or the amenities of nearby residents.

The assessment of the potential environmental effects resulting from the substation (as set out in the ER) has concluded that, there will be no significant effects due to the construction of the proposed Bryncir Substation.


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Policy A1

Environmental or other Impact Assessments Proposals will be refused unless sufficient information is provided with the planning application concerning any significant likely environmental or other impacts (e.g. ecological, noise, traffic, health, retail, linguistic, archaeological).

NGET has undertaken a non-statutory environmental appraisal of the proposed substation, the findings of which are set out in the accompanying Environmental Report (ER). The aim of the environmental appraisal is to:

• Identify and assess the potential environmental effects of the proposed substation and ensure mitigation measures (i.e. measures to avoid, reduce or offset negative effects or enhance beneficial effects) are proposed and incorporated into its design, construction and operation; and

• Provide Gwynedd Council with sufficient information about the environmental effects of the proposed substation and proposed mitigation to determine the application for full planning permission.

The ER has concluded that, there will be no significant effects due to the construction of the proposed Bryncir Substation.

Policy A2

Protecting the Social, Linguistic and Cultural Fabric Of Communities This explains that proposals will be refused unless sufficient information is provided with the planning application concerning any significant likely environmental or other impacts (e.g. ecological, noise, traffic, health, retail, linguistic, archaeological).

Policy B7

Sites of Archaeological Importance This policy seeks to ensure that proposals will not will damage or destroy archaeological remains of national importance (whether scheduled or not) or their setting. It advises that a development which affects other archaeological remains will be permitted only if the need for the development overrides the significance of the archaeological remains.

The ER (Chapter 6, Historic Environment) advises there are 23 designated heritage assets within 2km of the proposed development site but none within the proposed development site. The ER concludes that construction of the proposed substation has the potential to result in direct effects on potential sub-surface archaeological remains, damage to or partial removal of the surviving field boundaries and indirect effects on the surviving former farm building of Bryn-r’efail ganol. However, with appropriate recording measures in place these effects will not be significant. The ER also notes that the presence of the proposed substation in close proximity to the surviving building of Bryn-r’efail ganol has the potential to adversely affect the setting of the building. However, landscape screening in the form of either a woodland block or a hedge-topped clawdd would result in effects not being significant. The proposed development therefore accords with local planning policy relating to archaeology and heritage assets.


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Policy B15

International Nature Conservation Sites This policy seeks to protect the integrity of Special Protection Areas, Special Areas of Conservation or RAMSAR sites.

Chapter 5 of the ER (Ecology and Nature Conservation) presents a summary of the assessment of potential effects of the proposed substation on plants and animals and areas protected for their nature conservation value. It explains that the closest designated sites are the Corsydd Eifionydd/ Eifionydd Fens Special Area of Conservation (SAC) - approx. 1.92km away and the Llystyn Isaf Site of Special Scientific Interest (SSSI) – approx. 0.88km away. Three designated nature conservation sites have been identified more than 2km from the site. There are numerous candidate Wildlife Sites located within 1km of the site. The ER concludes that due to the relatively small scale of permanent habitat loss required and subject to the appropriate mitigation measure, no significant effects are anticipated. The proposed development accords with local planning policy relating to nature conservation.

Policy B16

Nationally Important Conservation Sites This policy aims to protect nationally important conservation sites, such as a Site of Special Scientific Interest (SSSI) or National Nature Reserve (NNR).

Policy B17

Sites of Regional or Local Significance This policy seeks to ensure no harm is caused to a Local Nature Reserve or Non-Statutory Nature Reserve or Wildlife Site.

Policy B20

Species and their Habitats that are internationally and nationally Important This policy seeks to ensure that proposals will not result in unacceptable disturbance or harm to protected species and their habitats.

Policy B22

Building Design This policy advises that proposals for new buildings will be refused unless it can be shown to the satisfaction of the LPA that the proposals:

• respect the site and its surroundings in terms of its scale, size, form, density, location, layout, symmetry, quality and suitability of materials, aspect, microclimate and density of building/land use and the space around and between buildings;

• do not have an unacceptable detrimental effect on the form and character of the surrounding landscape or townscape, or on the local natural or historical environment;

• do not have an unacceptable detrimental effect on prominent public views into, out of or across centres, villages, rural villages or open countryside.

Whilst the design of the proposed development is constrained by technical and operational requirements which limits the choices in terms of physical appearance, NGET has sought to design the proposed development taking into account environmental, socio-economic and costs factors as well as its statutory obligations and comments from the public thought the development stages. NGET has also adopted established design principles which assist in minimising landscape and visual effects. Furthermore, as part of the design process, assessments of the impact of the proposed development have been undertaken to ensure its effects are as low as possible and avoid severe adverse effects. The assessment of the potential environmental effects resulting from the substation (as set out in the ER) has concluded that, there will be no significant effects due to the construction of the proposed Bryncir Substation.


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Policy B27

Landscaping Schemes In respect of landscaping schemes this policy advises that proposals will be approved provided that high quality soft/hard landscaping appropriate to the site and the locality is provided. Wherever practical, it is expected that trees, hedges, pools, water courses, estate features, ’cloddiau’, slate fences, stone walls and any other features that are a part of the landscape are safeguarded and enhanced.

The effects of the proposed development on landscape and visual have been assessed and are presented in Chapters 3 and 4 of the ER. The proposed substation will benefit from a landscape scheme which includes:

• Proposed sections of new cloddiau alongside the bell mouth entrance to the proposed access road;

• Proposed new clawdd field boundary directly north of the proposed substation;

• Proposed restored field boundary/ re-planted clawdd to the east and west of the substation;

• Proposed restored and replanted clawdd to the west of the substation (subject to formal agreement); and

• Proposed small block of native woodland, directly to the north east of the substation within the corner of the existing field.

The ER concludes that once the landscape proposals have matured there will be no significant visual effects on any visual receptors.

Policy B34

Light Pollution This policy advises that proposals for lighting schemes will be permitted provided that they do not have significant harm on the amenity of neighbouring land uses and the environment.

Whilst external lighting will be installed at the substation for emergency work during hours of darkness, the substation will not normally be lit. Notwithstanding this, the lighting will be designed and installed to ensure that light spillage is minimised.


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Policy C1

Locating New Development This policy explains that land within the development boundaries of towns and Villages and the developed form of Rural Villages will be the main focus for new development. It goes on to advise that new buildings, structures and ancillary facilities in the countryside (i.e. outside development boundaries and outside the development form of Rural Villages) will be refused with the exception of development that is permitted by another policy of the Plan, for example development associated with providers of statutory infrastructure.

Although located outside any defined development boundaries the substation will be sited adjacent to the existing Pentir - Trawsfynydd 400 kV overhead line which runs along the western edge of the application site. In 2012, NGET undertook a design and appraisal process for the proposed new substation and identified a shortlist of three siting options. Consultations with the public were undertaken on the three options which revealed that the Central and Southern options were the better options from the public perspective. Further review of the shortlisted siting options was undertaken in June 2016 and as a result of supplementary feedback, further appraisal, and discussions with affected landowners, NGET identified the application site as being the preferred location for the new substation. A need for the proposed substation has been demonstrated and therefore the proposal is in accordance with this policy.

Policy CH19

Provision of New Infrastructure or Public Services This policy supports proposals to provide infrastructure or public services such electricity services provided that all the following criteria can be met: 1. that the scale and design of the

proposed development is suitable for the location and site;

2. that the development will not cause significant harm to the landscape, biodiversity, or a historic area/ feature, particularly within or near designated areas;

3. that the development will not cause significant harm to the amenities of neighbouring residents or to nearby sensitive uses;

4. that the development is acceptable in terms of parking, traffic and road safety.

The supporting text acknowledges the need for the Plan to facilitate adequate provision of infrastructure and to pay attention to the operational needs and investment plans of infrastructure providers.

Whilst the design of the proposed development is constrained by technical and operational requirements which limits the choices in terms of physical appearance, NGET has sought to design the proposed development taking into account environmental, socio-economic and costs factors as well as its statutory obligations and comments from the public thought the development stages. NGET has also adopted established design principles which assist in minimising landscape and visual effects. Furthermore, as part of the design process, assessments of the impact of the proposed development have been undertaken to ensure its effects are as low as possible and avoid severe adverse effects. The assessment of the potential environmental effects resulting from the substation (as set out in the ER) has concluded that, there will be no significant effects due to the construction of the proposed Bryncir Substation. A need for the proposed substation has been demonstrated and therefore the proposal is in accordance with this policy.


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Policy CH22

Cycling Network, Paths and Rights of Way This policy seeks to safeguards all parts of the cycling network, paths and public rights of way. It explains that if a public right of way cannot be satisfactorily incorporated within the development then an alternative new route should be provided which safely and attractively maintains or improves the local network.

A Public Right of Way (PRoW, Footpath 18 Dolbenmaen) currently runs through the proposed development site and will need to be permanently diverted to enable the construction of the proposed substation. The diverted footpath keeps close to the field boundary so people can continue using the footpath safely and conveniently

Policy CH28

Impact of Development on Journeys This policy advises that proposals for large scale developments that substantially increase the number of journeys will be refused unless they include measures to reduce the environmental impact as part of a Transport Assessment.

Chapter 9 of the ER (Traffic and Transport) advises that there will be no adverse effects on the local highway network during the operational phase of the proposed substation, due to the low number of vehicles expected to visit the site for inspections and maintenance. It further advises that with a Construction Traffic Management Plan in place there would be no significant effects as a consequence of the construction of the proposed substation.

4.4 Emerging Joint Local Development Plan

4.4.1 As explained previously Gwynedd Council and the Isle of Anglesey County Council

have decided to prepare a Joint Local Development Plan (JLDP) for Anglesey and the

Gwynedd Local Planning Authority Area.

4.4.2 Work is currently underway on the Anglesey and Gwynedd JLDP and on the 30 June

2017 the Council received the Inspector’s Report on the Examination into the Anglesey

and Gwynedd JLDP. The Inspectors concluded that, subject to the changes set out in

Appendix A and B of the Report, the Anglesey and Gwynedd JLDP 2011 – 2026 is

sound.

4.4.3 The Inspector’s Report is binding and the Council will now incorporate the changes

specified. As required by the Local Development Plan Regulations (2005) (as

amended), the Council will make arrangements to adopt the JLDP within 8 weeks of

receiving the Report. It is therefore expected that the Council’s will adopt the JLDP

within the next month. Once adopted, the JLDP will supersede the policies contained

within the UDP and present local planning policy up to 2026.

4.4.4 There are no policies which deal specifically with substations, however, the policies set

out in Table 4.2 on the next page are relevant to the consideration of this application.


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Table 4.2: Summary of JLDP Policies Policy Policy Summary Assessment of Policy Policy PS5

Sustainable Development The policy seeks to ensure that proposals will only be permitted where it can be demonstrated that they are consistent with the principles of sustainable development as set out in a number of criteria including (inter alia):

• Alleviate the causes of climate change;

• Preserve and enhance the quality of the built and historic environment;

• Protect and improve the quality of the natural environment;

• Reduce the effect on local resources;

• Promote a varied and responsive local economy;

• Promote high standards of design.

Although located outside any defined development boundaries the substation will be sited adjacent to the existing Pentir - Trawsfynydd 400 kV overhead line which runs along the western edge of the application site. In 2012, NGET undertook a design and appraisal process for the proposed new substation and identified a shortlist of three siting options. Consultations with the public were undertaken on the three options which revealed that the Central and Southern options were the better options from the public perspective. Further review of the shortlisted siting options was undertaken in June 2016 and as a result of supplementary feedback, further appraisal, and discussions with affected landowners, NGET identified the application site as being the preferred location for the new substation. A need for the proposed substation has been demonstrated and the proposal is in accordance with this policy. NGET has undertaken a non-statutory environmental appraisal of the proposed substation, the findings of which are set out in the accompanying Environmental Report (ER). The aim of the environmental appraisal is to:





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Policy TR4

Managing Transport Impacts This policy seeks to ensure that proposals should be planned and designed to promote sustainable modes of transport. The policy goes on to explain that proposals that would cause unacceptable harm to the safe and efficient operation of highway, public transport and other movement networks will be refused.

Chapter 9 of the ER (Traffic and Transport) advises that there will be no adverse effects on the local highway network during the operational phase of the proposed substation, due to the low number of vehicles expected to visit the site for inspections and maintenance. It further advises that with a Construction Traffic Management Plan in place there would be no significant effects as a consequence of the construction of the proposed substation.

Policy PS9

Wylfa Newydd and Related Development The policy explains that in their role as determining authorities for related development, for Wylfa Newydd, the Council requires that the proposed development complies with a number of criteria set out within the policy and policies PS9A-9C, where appropriate.

Policies PS9A-9C not applicable in the case of the sub-station as no accommodation, logistic centre or park and ride facilities are required. A need for the proposed substation has been demonstrated and therefore the proposal is in accordance with this policy.

Policy PS16

Conserving and Where Appropriate Enhancing the Natural Environment The policy outlines that the Council will manage development to conserve and where appropriate enhance the Plan’s areas distinctive natural environment and countryside. Proposals which will have a significant adverse effect on them will be refused unless the need for and benefits of the development outweigh the value of the site.

As explained above, NGET has undertaken a non-statutory environmental appraisal of the proposed substation, the findings of which are set out in the accompanying Environmental Report (ER). The aim of the environmental appraisal is to:





30

Policy PCYFF2

Design and Place Shaping The policy explains that all proposals are expected to demonstrate high quality design which takes into account the natural, historic and built environmental context to contribute to the creation of sustainable places.

Whilst the design of the proposed development is constrained by technical and operational requirements which limits the choices in terms of physical appearance, NGET has sought to design the proposed development taking into account environmental, socio-economic and costs factors as well as its statutory obligations and comments from the public thought the development stages. NGET has also adopted established design principles which assist in minimising landscape and visual effects. Furthermore, as part of the design process, assessments of the impact of the proposed development have been undertaken to ensure its effects are as low as possible and avoid severe adverse effects. The assessment of the potential environmental effects resulting from the substation (as set out in the ER) has concluded that, there will be no significant effects due to the construction of the proposed Bryncir Substation.

Policy PCYFF3

Design and Landscaping The policy seeks to ensure that all proposals integrate into their surroundings and have considered appropriate landscaping as part of the design proposal.

The effects of the proposed development on landscape and visual have been assessed and are presented in Chapters 3 and 4 of the ER. The proposed substation will benefit from a landscape scheme which includes:

• Proposed sections of new cloddiau alongside the bell mouth entrance to the proposed access road;

• Proposed new clawdd field boundary directly north of the proposed substation;

• Proposed restored field boundary/ re-planted clawdd to the east and west of the substation;

• Proposed restored and replanted clawdd to the west of the substation (subject to formal agreement); and

• Proposed small block of native woodland, directly to the north east of the substation within the corner of the existing field.

The ER concludes that once the landscape proposals have matured there will be no significant visual effects on any visual receptors.


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Policy PS17

Preserving or Enhancing Heritage The policy outlines that in seeking to support the wider economic and social needs of the Plan Area, Local Authorities will preserve and, where appropriate, enhance its unique heritage assets.

The ER (Chapter 6, Historic Environment) advises there are 23 designated heritage assets within 2km of the proposed development site but none within the proposed development site. The ER concludes that construction of the proposed substation has the potential to result in direct effects on potential sub-surface archaeological remains, damage to or partial removal of the surviving field boundaries and indirect effects on the surviving former farm building of Bryn-r’efail ganol. However, with appropriate recording measures in place these effects will not be significant. The ER also notes that the presence of the proposed substation in close proximity to the surviving building of Bryn-r’efail ganol has the potential to adversely affect the setting of the building. However, landscape screening in the form of either a woodland block or a hedge-topped clawdd would result in effects not being significant. The proposed development therefore accords with local planning policy relating to archaeology and heritage assets.

Policy AMG4

Local Biodiversity Conservation The policy outlies that proposals should protect and enhance biodiversity that has been identified as being important to the local area. The policy goes on to state that where necessary an Ecological Assessment which assesses the relevant biodiversity issues should be included with any application.

Chapter 5 of the ER (Ecology and Nature Conservation) presents a summary of the assessment of potential effects of the proposed substation on plants and animals and areas protected for their nature conservation value. It explains that the closest designated sites are the Corsydd Eifionydd/ Eifionydd Fens Special Area of Conservation (SAC) - approx. 1.92km away and the Llystyn Isaf Site of Special Scientific Interest (SSSI) – approx. 0.88km away. Three designated nature conservation sites have been identified more than 2km from the site. There are numerous candidate Wildlife Sites located within 1km of the site. The ER concludes that due to the relatively small scale of permanent habitat loss required and subject to the appropriate mitigation measure, no significant effects are anticipated. The proposed development accords with local planning policy relating to nature conservation.


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Policy AT4

Protection of Non-Designated Archaeological Sites and their Setting The policy outlines that proposals which may have a significant adverse impact on sites that are of potential national archaeological importance or could have local heritage importance and their setting should be assessed as part of any development proposals and may require either an archaeological assessment and/or field evaluation to determine the archaeological impact of the proposed development.

As explained above the ER (Chapter 6, Historic Environment) concludes that construction of the proposed substation has the potential to result in direct effects on potential sub-surface archaeological remains, damage to or partial removal of the surviving field boundaries and indirect effects on the surviving former farm building of Bryn-r’efail ganol. However, with appropriate recording measures in place these effects will not be significant. The ER also notes that the presence of the proposed substation in close proximity to the surviving building of Bryn-r’efail ganol has the potential to adversely affect the setting of the building. However, landscape screening in the form of either a woodland block or a hedge-topped clawdd would result in effects not being significant. The proposed development therefore accords with local planning policy relating to archaeology and heritage assets.

New Policy added by NMC 83

Development Boundaries The policy outlines that outside development boundaries, development will be resisted unless it is in accordance with specific policies in the plan or national planning policies, or the proposal demonstrated that its location in the countryside is essential.

Although located outside any defined development boundaries the substation will be sited adjacent to the existing Pentir - Trawsfynydd 400 kV overhead line which runs along the western edge of the application site. In 2012, NGET undertook a design and appraisal process for the proposed new substation and identified a shortlist of three siting options. Consultations with the public were undertaken on the three options which revealed that the Central and Southern options were the better options from the public perspective. Further review of the shortlisted siting options was undertaken in June 2016 and as a result of supplementary feedback, further appraisal, and discussions with affected landowners, NGET identified the application site as being the preferred location for the new substation. A need for the proposed substation has been demonstrated and therefore the proposal is in accordance with this policy.


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5 CONCLUSIONS 5.1 Summary and Conclusions

5.1.1 This Planning Statement has been prepared to accompany a planning application by

NGET for the construction of a new electricity substation with associated

infrastructure on land south of Bryncir, Gwynedd.

5.1.2 The proposed substation at Bryncir forms part of works by NGET to strengthen the

existing electricity network between Pentir and Trawsfynydd to ensure that the power

generation in North Wales can be accommodated following the connection of the new

nuclear power station at Wylfa Newydd on the Isle of Anglesey.

5.1.3 The function of the substation would be to take power from the existing Pentir –

Trawsfynydd 400 kV overhead line, transforming it to a voltage of 132 kV and connect

this to the existing 132 kV distribution network operated by SP Energy Networks.

5.2.4 Significant time and effort has been invested by NGET in consulting and refining the

proposed development prior to submitting the planning application to ensure that any

adverse impacts are limited where possible. Taking into account the conclusions of

the Environmental Appraisal, the principal residual effects will be temporary in nature,

which is characteristic of construction activities. Mitigation has been embedded to

ensure that any adverse effects are controlled.

5.2.5 This Planning Statement has considered the compliance of the proposed

development as a whole with the requirements of relevant national and local planning

policy and finds that there is policy support for the proposed development.

proposed new substation at bryncir · manweb 132 kv substation at four crosses. the power for the...

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