ms. a sidgwick slr consulting limited... · mid suffolk district council high street, needham...
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Mid Suffolk District Council
High Street, Needham Market, Ipswich, IP6 8DL Telephone: (01449) 724500 / Facsimile: (01449) 724627
www.midsuffolk.gov.uk
Suffolk Coastal District Council Melton Hill, Woodbridge, Suffolk, IP12 1AU
Telephone: (01394) 383789 / Facsimile: (01394) 385100 www.suffolkcoastal.gov.uk
Ms. A Sidgwick SLR Consulting Limited BY EMAIL
Please ask for: Mr. Elvin / Mr. Perkin
Direct line: 01449 724935 / 01502 523073
Fax number:
Your reference:
Our reference:
E-mail:
Please reply to:
7 December 2016
Dear Ms Sidgwick The East Anglia ONE Offshore Wind Farm Order 2014 Requirement 29 (1) Installation of Cable Ducts I refer to your email dated 2 November 2016. Mid Suffolk District Council and Suffolk Coastal District Council hereby discharge Requirement 29 (1) (b) in accordance with East Anglia ONE Offshore Windfarm Cable Method Statement (Document reference EA1-CON-R-IBR-021238, dated 2 November 2016). Yours sincerely
Michael Evans Strategic Director Babergh and Mid Suffolk District Councils
Philip Ridley Head of Planning & Coastal Management Suffolk Coastal and Waveney District Councils
CC Katherine Potts – Suffolk County Council
www.scottishpowerrenewables.com
East Anglia ONE OffshoreWindfarm
Cable Method StatementDCO Requirement 29 (1) (b)Final for Approval
ID: EA1-CON-R-IBR-021238
Created by / date: IEC / 28 Oct 2016Checked by / date: RM / 02 Nov 2016Approved by / date: PS / 02 Nov 2016
East Anglia ONE Offshore Windfarm November, 2016
Cable Method Statement
East Anglia ONE – EA1-CON-R-IBR-021238 Page 2
REVISION CONTROL
Revision and Approvals
Rev Date Reason for Issue Originated by Checked by Approved by
0 20/06/2016 Initial Draft MO JK DH
1 01/08/2016 Interim for Consultation IEC MC PS
2 02/11/2016 Final For Approval IEC RM PS
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Cable Method Statement
East Anglia ONE – EA1-CON-R-IBR-021238 Page 3
Table of contents
Abbreviations 4
1 Introduction 5
1.1 Project Overview 5
1.2 Purpose and Scope 5
2 Construction Overview 6
2.1 Cable Route and Working Width 6
2.2 Specialist Techniques 6
2.3 Construction Consolidation Sites 7
2.4 Construction Zones 8
3 Construction Methodology 9
3.1 Site Preparation 9
3.2 Site Enabling Works 10
3.3 Open Trench Duct Installation 11
3.4 Trenchless Duct Installation 13
3.5 Cable Installation 15
3.6 Reinstatement 16
4 Programme 17
4.1 Overview 17
4.2 Site Enabling Works Programme 17
4.3 Cable Civils Works Programme 19
4.4 Trenchless Works Programme 19
4.5 Cable Installation Programme 20
4.6 Re-instatement 21
FiguresFigure 1 Typical Trench Layout for EA ONE
Figure 2 Typical Trench Layout for EA THREE
Figure 3 Typical Trenchless Layout for Category 1 HDD
AppendicesAppendix 1 Onshore Cable Route Overview
Appendix 2 Typical Construction Cross Sections
Appendix 3 Construction Zones Plans
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AbbreviationsAC Alternating Current
CCS Construction Consolidation Site
CCT Consents Compliance Team
DC Direct Current
DCO Development Consent Order
EA Environment Agency
EIA Environmental Impact Assessment
EMS Environmental Management System
ES Environmental Statement
FID Final Investment Decision
GIS Geographical Information System
HDD Horizontal Directional Drill
HSE Health Safety and Environment
LPA Local Planning Authority
MW Megawatts
SED Special Engineering Difficulty
SPR ScottishPower Renewables
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1 Introduction1.1 Project Overview
1. East Anglia ONE Limited (EAOL) was awarded a Development Consent Order (DCO) by the Secretary of State; Department
of Energy and Climate Change (DECC) on June 17th 2014 for East Anglia ONE Offshore Wind Farm (EA ONE). The DCO
granted consent for the development of a 1200MW offshore windfarm and associated infrastructure.
2. In February 2015 EAOL secured a Contract for Difference (CfD) award to build a 714MW project and ScottishPower
Renewables announced its role in leading East Anglia ONE towards construction. In April 2015 EAOL submitted a non-
material change application to DECC to amend the consent from direct current (DC) technology to alternating current (AC).
In March 2016 DECC authorised the proposed change application and issued a Corrections and Amendments Order.
3. The onshore construction works associated with EA ONE comprise of the following, which is based on the AC technology
with an installed capacity of 714MW and transmission connection of 680MW:
A landfall site at Bawdsey, Suffolk.
Up to six underground cables, approx. 37km in length.
Up to four cable ducts for the East Anglia THREE projects.
An onshore substation located at Bramford next to existing National Grid infrastructure.
4. The scope of this document relates to the installation of cable ducts and underground cables along the onshore cable route
as part of the onshore construction works.
1.2 Purpose and Scope
5. This Cable Method Statement sets out the method and programme for installing cables ducts and cables as part of the EA
ONE onshore construction works. These works include the installation of cable ducts for proposed East Anglia THREE
project which will be installed alongside the cable ducts and cables for EA ONE and herein are referred to as the ‘onshore
cable works’.
6. This Cable Method Statement has been produced to fulfil DCO Requirement 29 (1) (b) which states:
29.—(1) Save in relation to plots 448 to 450, 453 to 454 and 457 to 471 in the book of
reference—
(a) all cable ducts forming part of the onshore connection works must be installed
simultaneously together with the onshore cables for the authorised project forming part of
the onshore connection works unless sub-paragraph (2) applies; and
(b) no stage of the connection works shall commence until a written method statement
showing the programme for laying the onshore cables for the authorised project and all
cable ducts as part of a single cable laying operation has for that stage been submitted to
and approved in writing by the relevant planning authority. The method statement must
include an implementation timetable for laying the cables for the authorised project and
all ducts and must be carried out as approved.
7. All works shall be in compliance with all documents produced to fulfil all other DCO Requirements, which include, but are not
limited to;
Ecological Management Plan (EA1-CON-F-GBE-008547);
Cable Landscape Management Plan (EA1-CON-R-IBR-010129);
Code of Construction Practice (EA1-CON-F-GBE-008547);
Archaeological Written Scheme of Investigation (EA1-CON-F-IBR-010138);
Fencing and Enclosures Plan (EA1-CON-R-IBR-009818); and
Highways and Access Improvements Plan (EA1-CON-R-IBR-009582).
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2 Construction Overview2.1 Cable Route and Working Width
8. The onshore cable route comprises a 37km corridor between the Suffolk coast at Bawdsey and the substation at Bramford,
passing the northern side of Ipswich. The onshore cable works comprise the installation of electricity transmission cables and
ducts, between the landfall location at Bawdsey and the new substation station adjacent to the existing substation at
Bramford. A plan showing the overview of the onshore cable route is presented in Appendix 1. The majority of the route will
be constructed using trenching methods while in certain locations trenchless techniques will be used.
9. Construction activities will be undertaken within a temporarily fenced strip of land known as the working width. The working
width is determined by electrical and civil engineering considerations and allows for sufficient spacing between the cables
trenches to prevent the cables overheating, plus room for the associated temporary construction works i.e. spoil storage,
drainage, haul road, works areas for personnel and machinery. A figure showing typical cross sections of the working width is
presented in Appendix 2.
10. In accordance with the DCO the working width shall not exceed 55m, except at the horizontal directional drilling locations
specified in Requirement 10 part (6), where the working width is increased to allow for the requirements of the specialist
technique.
2.2 Specialist Techniques
11. The onshore cable route traverses a number of major transport networks and natural obstacles. To enable the installation of
the cable across these major features, specialist techniques are required, namely use of Horizontal Directional Drilling (HDD).
These key locations are listed below and are referred to as ‘Category 1’ HDD sites (locations shown in Appendix 1), in
accordance with the DCO Requirement 10, the working width at these areas is increased, to between 110m and 160m
depending on the location (see Table 2-1 for details), to accommodate the method of work:
Millers Wood
Network Rail tracks west of A14 and River Gipping
A14 Trunk Road
A12 Trunk Road
Network Rail tracks to the south of Woodbridge and Martlesham Creek
Kirton Creek
River Deben
Coastal Landfall, Bawdsey
12. These HDD sites will require additional equipment, storage and ancillary facilities to that required for the conventional open
trench installation methods in order to accommodate the drilling activities. As such, a specialist HDD compound will be set up
at each side of the HDD location to enable the specialist plant and materials to be delivered directly and to facilitate the
drilling activities.
13. In addition to the above major features, a number of other features have been identified where the conventional open cut
trenching technique is not appropriate. At these locations ‘trenchless’ methods will also to be implemented, which will
comprise of a smaller HDD or auger bore. These sites are referred to as ‘Category 2’ HDD/trenchless. As the features to be
crossed are less significant, they will not require any additional compounds and works will take place within the standard 55m
working width. Table 2-1 provides a list all the HDD / trenchless locations.
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Table 2-1 HDD (Cat 1) / HDD (Cat 2) Trenchless Locations
Reference Category Location/ Feature Approximate
Length (m)
Max Width
(m)
HDD-01 Cat 1 Millers Wood off Bullen Lane 200 130
HDD-02 Cat 2 Somersham Watercourse 70 55
HDD-03 Cat 2 Pound Lane 60 55
HDD-04 Cat 1 River Gipping and Network
Rail track west of A14
385 130
HDD-05 Cat 1 A14 Trunk Road and Old
Ipswich Road
200 160
HDD-06 Cat 2 River Fynn 30 55
HDD-07 Cat 2 Lodge Road 60 25
HDD-08 Cat 1 A12 Trunk Road 165 120
HDD-09 Cat 2 Top Street 90 55
HDD-10 Cat 2 Sandy Lane 90 50
HDD-11 Cat 1 Martlesham Creek and
Network Rail tracks south of
Woodbridge
650 160
HDD-12 Cat 2 Waldringfield Road 70 55
HDD-13 Cat 2 Watercourse east Howe’s
Farm
50 55
HDD-14 Cat 1 Kirton Creek 550 110
HDD-15 Cat 2 Sewage works outfall
watercourse, south of Park
Lane
50 55
HDD-16 Cat 1 River Deben 700 55
HDD-17 Cat 2 Queen’s Fleet 70 55
HDD-18 Cat 1 Landfall, Bawdsey 1000 160
HDD-19 Cat 2 Bramford Road 60 55
HDD-20 Cat 2 Grundisburgh Road 50 55
2.3 Construction Consolidation Sites
14. All of the onshore cable works will be supported by nine Construction Consolidation Sites (CCSs) (referenced A to I), these
are construction compounds which will be utilised for welfare, site staff accommodation, parking, as well as providing secure
storage for materials, plant and equipment. The CCSs are categorised as Primary and Secondary, there are two Primary
CCSs; CCS B will be a designated storage and delivery facility and the main administrative compound and CCS E will be a
designated storage and delivery facility with designated office space. The remaining seven Secondary CCSs shall be for the
purpose of access, storage and deliveries. A list of the CCS locations is presented in Table 2-2 and the locations are shown
on the presented in the Appendix 1.
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Table 2-2 Construction Consolidation Site Locations
CCS Ref CCS Type Address
A Secondary Bullen Lane, Bramford, Ipswich, Suffolk IP8
B Primary Paper Mill Lane, Claydon, Ipswich, Suffolk IP6 0AP
C Secondary Witnesham Road, Ipswich, Suffolk IP6
D Secondary Church Road, Ipswich, Suffolk IP6 9DS
E Primary Top Street, Martlesham, Suffolk IP12
F Secondary Woodbridge Road, Newbourne, Woodbridge, Suffolk IP12 4PA
G Secondary Park Lane, Ipswich, Suffolk IP10
H Secondary Sheepgate Lane, Ipswich, Suffolk IP10 0QZ
I Secondary Ferry Road, Woodbridge, Suffolk IP12 3AS
2.4 Construction Zones
15. For the purpose of construction the onshore cable works has been divided into eleven construction zones. The construction
zones are based on a combination of access controls and lock-out points, which are defined by the presence of natural
barriers or other constraints that will interrupt the continuity of access to the onshore cable route. These eleven construction
zones are the main basis of construction programme development. Table 2-3 lists the breakdown of these zones and
includes the corresponding Work Package Numbers (Work No.), referred to within the DCO and their locations are shown on
the plans presented in Appendix 3.
Table 2-3 Construction Zones
Zone DCO WorkNo.
From To ApproximateLength (m)
1 37E to 36 Substation Pound Lane 3930
2 36 to 35A Pound Lane East of Network Rail and RiverGipping HDD
835
3 34B to 33A East of Network Rail and RiverGipping HDD
East of A14/Old Ipswich RoadHDD
785
4 32 to 29 East of A14/Old Ipswich RoadHDD
East of Clopton Lane 6520
5 29 to 26 East of Clopton Lane West of River Lark 4870
6 25C to 21 West of River Lark North of Network Rail &Martlesham Creek HDD
3410
7 20 to 18 North of Network Rail &Martlesham Creek HDD
East of Waldringfield RoadCamp Site
3450
8 15 (part of) East of Waldringfield RoadCamp Site
South of Ipswich Road (HeathRoad)
410
9 17 to 15 South of Ipswich Road (HeathRoad)
North of Kirton Creek HDD 3190
10 14 to 8 North of Kirton Creek HDD West of River Deben HDD 4250
11 7B to 3B West of River Deben HDD Landfall 4900
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3 Construction Methodology16. This section describes the construction methodology associated with the installation of the onshore cable works, these works
comprise of the following and a description of each is provided in the following sections:
Site Preparation;
Site Enabling Works;
Open Trench Duct Installation;
Trenchless Duct Installation (e.g. HDD);
Cable Installation; and
Reinstatement.
3.1 Site Preparation
17. The site preparation works comprise the following activities:
Highways Improvements;
Archaeology Mitigation Works; and
Vegetation Clearance.
18. The site preparation works will be undertaken prior to the commencement of the main construction works. A brief description
of each of the activities is provided in sections 3.1.1 to 3.1.3. All of these activities are covered by independent DCO
Requirements, detailed plans have been prepared to fulfil these requirements.
3.1.1 Highways Improvements
19. To facilitate safe access and egress for the onshore cable works a series of highways improvements are required which
require road alterations works to be completed prior to the main construction work commencing. Such improvements include
junction improvements and the installation of passing places. All identified highway improvement works will be completed
prior to the construction works commencing in the associated area to ensure the road network is suitable for construction
use.
20. Full details of the improvement works are presented in the Highways Improvements and Access Management Plan (EA1-
CON-R-IBR-009582), which has been produced to fulfil DCO Requirement 14 and 25 (c).
3.1.2 Archaeology Mitigation Works
21. An Archaeological Written Scheme of Investigation (WSI) (EA1-CON-F-IBR-010138) has been prepared to fulfil DCO
Requirement 18. The WSI identifies areas where a programme of archaeological investigation (evaluation, mitigation,
excavation, built heritage recording and watching brief) is required, and the measures which will be taken to protect, preserve
in situ or record any significant archaeological remains that may be found.
22. The programme of archaeological investigation works will be undertaken in accordance with the approved WSI in all
identified archaeological sensitive areas prior to the commencement of the main construction works. Further details provided
in the Archaeological Written Scheme of Investigation (EA1-CON-F-IBR-010138).
3.1.3 Vegetation Clearance
23. A Cable Landscape Management Plan (CLMP) (EA1-CON-R-IBR-010129) has been prepared to fulfil DCO Requirement 12.
The CLMP identifies the trees and hedgerows that will be removed along the onshore cable route to facilitate the construction
activities. In order to avoid any impact on potential breeding birds where possible vegetation clearance will be completed
outside the breeding bird season (March to September).
24. All vegetation clearance will be completed in accordance with the Cable Landscape Management Plan (EA1-CON-R-IBR-
010129). An Arboricultural Clerk of Works will be appointed to ensure that all tree works are undertaken to the required
standards.
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3.2 Site Enabling Works
25. The site enabling works comprise the following activities:
Access improvements;
Construction of CCSs;
Preparation of working width (i.e. installation of fencing);
Topsoil stripping; and
Installation of the haul road.
26. A description of these activities, in sequence, is provided in sections 3.2.1 to 3.2.5. All temporary works associated with the
enabling works, will be continuously monitored and maintained throughout the construction period. Where required
maintenance and/or repairs of the haul road, fencing etc. will be undertaken.
3.2.1 Access Improvements
27. To facilitate safe access and egress for the onshore cable works a series of access improvements are required which include
the widening of existing entrancesand the installation of new bellmouths onto public roads. Full details of the improvement
works are presented in the Highways Improvements and Access Management Plan (EA1-CON-R-IBR-009582).
3.2.2 Construction of CCSs
28. The construction of the CCSs involves stripping of topsoil, importing and laying stone for the compound base and installing
cabins and welfare facilities. The two Primary CCSs (‘B’ and ‘E’) will be the first to be installed. Once these two main
compounds are installed, the Secondary CCSs will be installed to provide access points to allow the haul road construction to
start.
3.2.3 Preparation of Working Width
29. Temporary fencing and gateways will be erected along the boundary of the working width. The default fencing type will be a
basic type, e.g. post and rail or post and wire, visually defining the boundary of the working width. Where the boundary
interface requires a higher level of protection, for instance livestock fields or housing developments, then protective fencing
will be used. Signage and notices will be fixed along this boundary to inform members of the public of the works being
undertaken. Full details of the fencing to be installed are detailed in the Fencing and Enclosures Plan (EA1-CON-R-IBR-
009818).
30. High visibility signage and suitable protection will be installed to denote any third party utility crossings (such as gas pipelines
or overhead power lines). An Arboricultural Clerk of Works will be appointed during construction to oversee the erection of
fencing for the protection of trees and hedgerows that are to be retained.
3.2.4 Topsoil Stripping
31. Once the working width has been prepared, the remaining topsoil will be stripped from: the haul road location, trench areas
and subsoil storage areas, and then stored in a designated area within the working width (see typical cross section in
Appendix 2). Topsoil storage and management shall be compliant with the relevant standards and guidance as set out in the
Cable Landscape Management Plan (EA1-CON-R-IBR-010129), which includes but is not limited to:
Maximum storage heights of mounds: 2m for topsoil.
Topsoil to be stripped in the driest condition possible.
Use tracked equipment wherever possible to reduce compaction.
Confine movement of trucks or dumpers to designated temporary haul routes.
Do not incorporate vegetation into topsoil to be stored.
Do not strip soils during or after heavy rainfall or when there are pools if water on the surface.
Do not strip topsoil too deeply so that subsoil becomes incorporated, thereby reducing fertility.
Do not remove topsoil from below the spread of trees and hedgerows to be retained.
To prevent compaction of topsoil and subsoil during stockpiling, the stockpiles shall be formed by tipping in mounds
which shall not subsequently be tracked over by vehicles.
Stockpiles shall be kept free of pernicious weeds.
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Topsoil and subsoil shall not be allowed to be mixed or cross contaminated with one another or any other unsuitable
materials.
No soils shall be stored within the Root Protection Area of trees or shrubs.
32. Topsoil shall be stored to one side of the working width, in such a way that it is not mixed with any subsoil. Storage time will
be minimised, to prevent the soil deteriorating in quality. Topsoil stripped from different fields will be stored separately, as will
soil from specific hedgerow banks or woodland strips.
3.2.5 Installation of Haul Road
33. A temporary haul road will be installed along the cable route between the CCS locations and access points onto the local
public roads. The haul road will installed for a width of 5.5m along a designated route, following the initial topsoil stripping.
The temporary haul road will be constructed working from the installed CCS locations in two directions, away from the CCS
and towards the adjacent CCS, along the onshore cable route following the initial topsoil stripping.
34. Temporary haul road construction will typically involve the placement of a depth of suitable imported stone material onto a
geotextile on existing subsoil. In order to reduce the volume of imported stone material, the preferred method of temporary
haul road construction will involve the improvement of the underlying conditions prior to the installation of the imported stone.
The methods will follow one of the following options to improve the bearing capacity of the sub-soil; the placement of a geo-
grid material or chemical stabilisation. The type of method used will depend on a number of factors including ground
conditions, programme and landowner requirements. In the event that the stabilisation cannot be achieved then the
temporary haul road will be constructed using the traditional method and be at an increased depth of imported stone.
35. In some special circumstances the temporary haul road may comprise a temporary “trackway”, this will only be the case
where the haul road is required only for a short period of time (i.e. weeks) at locations where through road access is not
required.
36. Temporary crossings at watercourses and drainage ditches will be installed where haul road access is required across such
features. The design of each crossing will have prior approval from the relevant drainage authority. Further details on
watercourse crossings are provided in the Watercourse Crossing Method Statement within the Code of Construction Practice
(EA1-CON-F-GBE-008547).
3.3 Open Trench Duct Installation
37. The open trenching method will be used for the installation of cable ducts along the majority of the onshore cable route. The
open trench method involves the excavation of a trench, using a suitably sized tracked excavator (or similar equipment),
followed by the installation of the cable ducts and then the backfilling of the trench. The ducts will be laid to a minimum depth
to the top of the cables of approximately 1.25m below ground level, unless a shallower depth is required to avoid existing
utilities. The ducts for EA ONE will be installed in two parallel trenches, each trench will contain three power cable ducts and
one fibre optic cable duct. Figure 1 below shows the typical content and layout of the ducts as installed in open trenches for
EA ONE, however the width of trench and spacing between them would vary depending on the depth of burial.
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Figure 1 Typical Trench Layout for EA ONE
38. A further trench will be excavated in parallel to install three power cable ducts and a fibre optic duct for the future EA THREE
project. Figure 2 below shows the typical content and layout of the ducts to be installed for EA THREE. A cross section
showing EA ONE and EA THREE trenches are included in Appendix 2.
Figure 2 Typical Trench Layout for EA THREE
39. Once trenches are excavated the ducts will be installed within the trench. Ducting will be delivered to Primary CCS Sites and
then will be transferred, via the haul road or along the designated routes of the public road network, to the Secondary CCS
Sites for temporary storage or onto the required location on the onshore cable route. The ducts will be surrounded by a
thermally stable backfill of cement bound sand (CBS) or selected sands to ensure a known thermal conductivity around the
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cables in order to maintain the cable rating (capacity to carry current). The trench will then be backfilled with the excavated
subsoil to working level.
40. Cable protection tiles would be fitted above the cables in each trench, featuring indented lettering warning of the danger of
electricity below. Plastic warning tape will be placed between the protection tiles and the ground surface, alerting future
excavators to the danger of the electric cables below.
41. The excavation of the trenches, duct installation and backfilling will be sequenced to minimise the amount of material
required to be moved to temporary storage or removed from site. The excavations will be progressed in stages, opening a
length of trench, installing the ducts then reinstating the trench with the same excavated subsoil back to working level. The
trenches for EA ONE will be installed first, starting with the cable trenches furthest away from the haul road, followed by the
trench for EA THREEs.
42. Particular care will be taken to ensure that the existing land drainage regime is not compromised as a result of the
construction. Pre-construction survey and local landowner information will be utilised to identify drainage locations, known
drainage features will be marked with appropriate wooden stakes along the line of the drain. Land drainage systems will be
maintained during construction, and be reinstated on completion. Temporary cut-off drains will be installed. These will be
installed parallel to the trenchs, before the start of construction, to intercept runoff from the stripped ground and stockpiled
soils before it reaches the trenches. These interceptor drains will discharge to local drainage ditches after passing through
treatment, as appropriate, to minimise sediment release. A further description of the control measures available to be used
are included in the Surface Water & Drainage Management Plan (EA1-GRD-F-IEC-007683).
3.4 Trenchless Duct Installation
43. Where, due to the existence of features, it is not possible to install the cable ducts using the open trench method, trenchless
installation techniques shall be used. Trenchless techniques require the use of specialist drilling and pulling equipment to
install the cable ducting, avoiding the need to dig an open trench. The most widely used of these techniques is HDD,
however other methods such as auger boring may be used where appropriate.
44. The locations where trenchless duct installation is required are defined in Table 2-1. Two main categories of trenchless
operation have been identified along the onshore cable route as Category 1 and Category 2 (see Section 2.2 for further
details). Category 1 trenchless locations are to address those sites with major features, corresponding to the locations
identified in the DCO Requirement 10. All of these crossings will be carried out using the HDD technique. The Category 2
trenchless crossings will use a combination of smaller HDD or auger boring, as appropriate to the location.
45. At each of these Category 1 HDD locations there will be an access installed to each side of the crossing, either using the haul
road or a new access created directly off the public road dependent on location and sufficient space allocated for a HDD
compound. These crossings have a wider corridor, as identified in the DCO, and their profiles are based on drilling a series of
a single bores for each cable. This is in order to meet the performance requirements of the circuits installed at greater depths.
Figure 3 shows typical cross-sections of the nine main cable ducts that are required for installation of ducts for EA ONE and
EA THREE, these are also presented in Appendix 4. Configurations will depend on length of the drills and how deep the drills
need to go. Flat cable formation is required for deeper drills, trefoil is required for shallower drills. The latter will be deployed
where ever possible so that minimum width and construction time is used.
46. Category 2 trenchless locations are required for crossings of lesser features or to reduce disruption and are shorter in length
to the Category 1 locations. The cable corridor working width at these trenchless locations is not widened beyond 55m and
access to these locations will be provided through the temporary haul road.
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Figure 3 Typical Trenchless Layouts
47. The HDD method involves drilling under the obstacle at an appropriate depth using drill which can travel horizontally and
vertically. It requires two areas of hard standing to be installed at each side of the HDD crossing. The first will provide space
for the installation of the HDD rig site where the HDD enters the ground, and the second is at the exit point on the other side
of the crossing. The exit point is also typically the area where the ducting will be joined together into longer strings from
where it will be pulled through the bored hole, back towards the HDD rig site.
48. For a Category 1 HDD, a typical entry point site (area of approximately 75m x 100m), would be required to accommodate the
drilling rig, ancillary equipment, offices, working facilities and storage of drilling fluid, water and drill pipes. At the exit point of
each crossing, an area of approximately 30m x 25m would be required to accommodate the exit pit and mud storage tanks
and ducts for the crossing.
49. A typical HDD operation (Category 1 or Category 2) involves three distinct stages:
1. Drilling a pilot hole from the entry point to the exit point.
2. Reaming (widening) of the bore using special cutting heads, to enlarge the bore to the required diameter.
3. Pulling one or more ducts back through the reamed hole.
50. The addition of a drilling fluid, such as bentonite (a type of clay), is used to lubricate the drill head during cutting and also to
assist in the removal of waste spoil out of the hole, as it is widened (reamed). This procedure is repeated until the drilled
hole has reached the intended final diameter. The hole is typically cut to a size 1.5 times larger than the duct it has to carry.
This additional diameter is to allow the easier removal of drill cuttings and the installation of the duct, allowing for any soil
expansion that may occur during pulling. At each HDD site, the above process will be repeated until all of the required ducts
are installed at the crossing.
51. Once all the individual ducts have been installed, the drilling rig and associated plant and equipment will be removed. The
retained drilling mud and collected cuttings will be sampled, analysed and disposed of to an off-site waste disposal facility, in
accordance with the Waste Management Plan (EA1-GRD-F-IEC-007682).
East Anglia ONE Offshore Windfarm November, 2016
Cable Method Statement
East Anglia ONE – EA1-CON-R-IBR-021238 Page 15
52. Category 2 trenchless crossings will use a combination of smaller HDD method (as described above) and/or auger boring, as
appropriate to the location. The auger boring method requires the excavation of pits on either side of the feature to the depth
of the required installation. Continuous flights are rotated and simultaneously pushed into the ground at this depth. As the
bore progresses the ground is cut and the auger flights convey the material back into the work pit.
3.5 Cable Installation
53. Once the cable duct installation is completed then works will commence on the installation of the cable within the ducting
system. As the onshore cabling typically comes on drums of up to 2,000m in length, jointing bays will be required along the
cable route to join the sections of cable together. These jointing bays, approximately 10m long x 5m wide x 5m deep, will be
constructed at regular intervals along the onshore cable route to allow cable pulling and jointing at a later stage. The joint bay
will be excavated, a concrete poured floor will be created and concrete or brick walls will be installed. The bay will be topped
with concrete slabs which will be covered with subsoil to a depth of 1.1m.
54. Access to the joint bays will be required during operation for routine integrity testing. Access will take the form of an
inspection pit with a manhole cover which will be visible at the surface.
55. Associated with each of the joint bays will be an area of temporary hard-standing suitable to safely accommodate cable
drums and pulling equipment. These areas will be constructed using imported stone or using temporary “trackway”, which
would then be used at different locations along the route.
56. Cables will be delivered to the respective CCSs for secure storage and handling. The cable drums will be lifted from the
delivery trailer onto a hard standing for temporary secure storage. From the CCSs, the cables will be transferred, along the
haul road, by tractor and cable drum trailer to the corresponding joint bays when required for pulling operations.
57. The cable pulling system will consist of a steel bond attached to the cable end and then to a powered winching system, with
free spinning cable rollers placed along the bottom of the joint bay up to the end of the cable duct. Other variants of cable
pulling systems can be used, which could include the use of motorised rollers or tracked caterpillar drives to push the cable
forwards, as it is pulled from the opposite end.
58. The cable drum will be placed on a raised spindle mounted on a hydraulic cable trailer. The cable will then be pulled from the
drum into the trench on the pre-installed rollers, and once drawn through will leave the sealed ends in each joint bay ready for
jointing to previous and successive cable lengths.
59. Temporary weather-proof structures (‘tents’) will be erected over each joint bay when the construction team are ready for
cable jointing to commence. This is to provide a dry and clean atmosphere to carry out jointing tasks to the required quality.
Artificial lighting and heating will also be required, should seasonal and weather conditions dictate.
60. On completion of the cable installation and jointing works, the joint bay structure will be left in situ and the land around them
reinstated leaving access to the inspection pit used for testing of circuits and commissioning works. On completion of testing
and commissioning works area above the joint bays will be backfilled and the ground fully reinstated with the exception of the
surface manholes.
61. The onshore cable route will be marked with marker posts at key locations such as field boundaries and main river crossings.
These will be visible from the ground and all marker posts will be located to minimise interference with agricultural activities.
62. The cable installation will continue throughout the route, potentially with simultaneous installation at several locations,
depending on progress and programme as detailed in Section 4.
East Anglia ONE Offshore Windfarm November, 2016
Cable Method Statement
East Anglia ONE – EA1-CON-R-IBR-021238 Page 16
3.6 Reinstatement
63. After the completion of cable installation, testing and commissioning, the reinstatement works will commence, which will
comprise:
Removal of all temporary infrastructure including the haul road and associated infrastructure (e.g. flume crossings,
temporary bridges).
Topsoil will be re-instated along the working width. This will be graded, levelled and seeded where required in
accordance with the Cable Landscape Management Plan (EA1-CON-R-IBR-021236).
Hedgerows and trees will be replanted in line with Cable Landscape Management Plan during the first appropriate
planting season following site restoration.
CCS and HDD compounds will be removed and reinstated to match original profiles.
Temporary fencing will be removed and affected ground reinstated.
All temporary signage associated with traffic routes will be removed.
64. All public roads will be reinstated in line with New Roads and Street Works Act 1991 Specification for the Reinstatement of
Openings in Highways.
East Anglia ONE Offshore Windfarm November, 2016
Cable Method Statement
East Anglia ONE – EA1-CON-R-IBR-021238 Page 17
4 Programme4.1 Overview
65. The main construction works for the onshore cable route are planned to take place over two years between March 2017 and
February 2019. The works will be completed in four packages, with a contractor being appointed to undertake each package;
Site Enabling Works (as detailed in Section 3.1 and reinstatement works).
Cable Civil Works (duct installation via open trench method).
Trenchless Works (duct installation via trenchless method e.g. HDD).
Cable Installation.
66. As indicated in section 3.1 some site preparation activities will be undertaken prior to the start of the main construction works.
These works are programmed to commence from December 2016.
67. A summary of the overall main construction works programme is shown in Table 4-1, on completion of the construction
works, commissioning works will continue until full operation. Further details on each package of works are provided in the
following sections, which include an anticipated breakdown of the programme into the construction zones (as detailed in 2.4
and shown in Appendix 2). Please note the programme presented does not account for potential unforeseen events, such as
extreme weather, which may result in amendments.
Table 4-1 Programme Overview
2017 2018 2019
Work Package 1 2 3 4 5 6 7 8 9 10 11 12 1 2 3 4 5 6 7 8 9 10 11 12 1 2
Site Enabling
Cable Civils Works
Trenchless Works
Cable Installation
Reinstatement
Key Construction Works
Maintenance works
4.2 Site Enabling Works Programme
68. Enabling works will commence by establishment of the Primary CCS sites (‘B’ and ‘E’), followed by the Secondary CCSs. It is
anticipated that the establishment of the Secondary CCSs will commence with CCS A and CCS G and then followed by C, I,
F, D and H. The sequence of secondary CCSs set up will be determined by the requirements of the cable civil works and
HDD contactor and may be subject to change. It is anticipated to all CCSs will be established by July 2017.
69. The preparation of the working width (i.e. the fencing off of the area) will start at the same time as the nearby CCS
establishment or shortly after the CCS is established. It is proposed that preparation works start at four to six different
locations along the cable route using individual teams. The preparation of the working width is programmed to be completed
by July 2017 to facilitate the next stage of construction works.
70. Top soil stripping and storage will commence following the preparation of the working width. It is anticipated that top soil
stripping will commence at four to six different locations and will be completed by July 2017.
71. Installation of haul road will follow at the areas where the preparation works and top soil stripping has been completed.
However, the productivity rate per linear metre of haul road installation will be lower than the working width preparation and
top soil stripping and it is programmed that haul road installation for the entire onshore cable route would continue until
August 2017.
East Anglia ONE Offshore Windfarm November, 2016
Cable Method Statement
East Anglia ONE – EA1-CON-R-IBR-021238 Page 18
72. There are restrictions on when works can take place for Zone 8 due to its use as a campsite. Works can only take place
within this zone between October to January, however only limited enabling works are required within this zone.
73. Following the completion of the enabling works, maintenance works will be ongoing throughout construction, until
reinstatement works commence on completion of the cable installation.
74. The programme for the Site Enabling Works per construction zone is shown in Table 4-2. Please note the programme
presented does not account for potential unforeseen events, such as extreme weather, which may result in amendments.
Table 4-2 Site Enabling Works Programme
Key Construction Works
Maintenance works
2017 2018
1 2 3 4 5 6 7 8 9 10 11 12 1 2 3 4 5 6 7 8 9 10 11 12
Primary CCS Sites
Secondary CCS Sites
Zones 1
Zone 2
Zone 3
Zone 4
Zone 5
Zone 6
Zones 7
Zones 8
Zones 9
Zone 10
Zone 11
Maintenance
East Anglia ONE Offshore Windfarm November, 2016
Cable Method Statement
East Anglia ONE – EA1-CON-R-IBR-021238 Page 19
4.3 Cable Civils Works Programme
75. Cable civil works, comprising of the duct installation using the open trench method, is expected to take around nine months. It
is proposed to work consecutively at multiple locations, with the potential for works to be undertaken at up to six locations at
one time.
76. The anticipated programme for the Cable Civil Works per construction zone is shown in Table 4-3.
Table 4-3 Cable Civil Works Programme
2017 2018
1 2 3 4 5 6 7 8 9 10 11 12 1 2 3 4 5 6 7 8 9 10 11 12
Zone 1
Zone 2
Zone 3
Zone 4
Zone 5
Zone 6
Zone 7
Zone 8
Zone 9
Zone 10
Zone 11
4.4 Trenchless Works Programme
77. The Category 1 HDD installation works are programmed to start in March 2017 with preliminary site activities (establihsing
compounds, special rig set up, etc.). For the Category 2 HDD/trenchless works two to four smaller rigs will work on site at
different locations at the same time, to ensure that all of the HDD works are completed by December 2017.
78. For the eight Category 1 HDDs along the onshore cable route it is expected that three HDD rigs will be set up at different
locations in order to ensure the work is complete by December 2017. However, if in the event that the works need to
accelerated more HDD rigs may be utilised.
79. The anticipated programme for the trenchless works are shown in Table 4-4.
East Anglia ONE Offshore Windfarm November, 2016
Cable Method Statement
East Anglia ONE – EA1-CON-R-IBR-021238 Page 20
Table 4-4 Trenchless Works Programme
2017 2018
1 2 3 4 5 6 7 8 9 10 11 12 1 2 3 4 5 6 7 8 9 10 11 12
HDD-01 Miller’s WoodWork No 37A (Zone 1)
HDD-04 River Gipping &RailwayWork No. 35A (Zone 2)
HDD-05 Old Ipswich Road& A14Work No. 33A (Zone 3)
HDD-08 A12Work No. 24 (Zone 6)
HDD-11 Railway &Martlesham CreekWork No. 19 (Zone 7)
HDD-14 Kirton CreekWork No. 14 (Zone 10)
HDD-16 River DebenWork No. 7A (Zone 11)
HDD-18 LandfallWork No. 3B (Zone 11)
Category 2 Trenchless
4.5 Cable Installation Programme
80. Cable installation works is programmed to start in October 2017 in up to two different locations in the construction zones
where the duct installation works has been completed (both HDDs and open trenching works), starting at Zone 1 and
continuing sequentially along the cable route. In the event that that works needs to be accelerated, there is a potential for
work to commence at up to four locations at one time.
81. No cable installation works are required in Zone 8, as no joint bays will be located in this area. Works in Zone 1 will be
ongoing throughout 2018 to coordinate with the installation of the cables at the substation. The programming of works in
Zone 11 is dependent on the installation of the offshore cable and therefore does not follow the sequencing and works are
required throughout the year.
82. Cable installation works are programmed to be completed by December 2018. Table 4-5 shows an anticipated programme
for the cable installation works across the construction zones.
East Anglia ONE Offshore Windfarm November, 2016
Cable Method Statement
East Anglia ONE – EA1-CON-R-IBR-021238 Page 21
Table 4-5 Cable Installation Programme
2017 2018
1 2 3 4 5 6 7 8 9 10 11 12 1 2 3 4 5 6 7 8 9 10 11 12
Zone 1
Zone 2
Zone 3
Zone 4
Zone 5
Zone 6
Zone 7
Zone 8 (no works required)
Zone 9
Zone 10
Zone 11
Testing
4.6 Re-instatement
83. Partial top soil reinstatement works on the top of trenches will start in October 2017 at the locations where the cable
installation is completed. However, the full top soil reinstatement will be completed following removal of the haul road which is
programmed to be done by February 2019.
84. Following completion of cable installation and initial testing of the cable, the haul road will be removed for majority of the
cable route and top soil reinstatement and fencing removal will follow.
85. Some elements of the temporary works may need to remain in place until the start of Windfarm operation at the landfall
where access is required for commissioning works associated within the offshore cable.
86. With the exception of the landfall site, the cable route corridor will be fully reinstated between October and February 2019
and all CCS locations returned to original landscaping.
East Anglia ONE Offshore Windfarm November, 2016
Cable Method Statement
East Anglia ONE – EA1-CON-R-IBR-021238 Page 22
Appendix 1 Onshore Cable RouteOverview
HDD-03
HDD-01
HDD-04HDD-05
HDD-06
HDD-07
HDD-08
HDD-11
HDD-12
HDD-13
HDD-14
HDD-15HDD-16
HDD-17 HDD-18
HDD-20
HDD-10
HDD-19
HDD-02
HDD-09
CCSD -Bealings
Road
CCSB -Witnesham
Road
CCSA -BullenLane
CCSC -Paper
Mill Lane
CCSF -Woodbridge
Road
CCSG -Park Road
CCSE - TopStreet
CCSH -RiverDeben
CCSE- TopStreet
CCSI -Ferry Road
Landfall
610000
610000
620000
620000
630000
630000
2400
00
2400
00
2500
00
2500
00
1 234
567 8 9 10 1113 14
15 1617 18 19
20 21 22 24 26 272829 30
31
3233
34 35363738
394041
43 4446
474849 50
51 52 53
5455
575859 60
pw:\\FGDPRODPWV8.euro.iberdrola.local:UKRENEW\Documents\UK%20Offshore\3%20-%20PROJECTS\EA1%20Grid%20Package\03%20ONSHORE%20CABLE\02%20ENGINEERING%20DESIGN\01%20Technical%20Documentation\07%20GIS\01%20Drawings\
1:42,000
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DRAWING PREPARED BY:
ORIGINAL PLOT SIZE
ISSUE DRAWNDATE CHKD APPD
A1
REVISION NOTES
DRAWING TITLE
PROJECT TITLE
SCALE
DATUM
DRAWING NUMBER
UNITS
PURPOSE
DRAWING ID
COORDINATE SYSTEM PROJECTION
© Crown Copyright 2016. All rights reserved. Ordnance Survey Licence 0100031673.
1 of 1
0 2,000 4,000 m
OSGB 1936BNG TRANSVERSE MERCATOR
METRE
DRAFT FOR COMMENT
EA ONE ONSHORE CABLE
ONSHORE CONSTRUCTION WORK OVERVIEW
EA1-GRD-DG-IEC-021702 Rev 0A
LEGEND
Note:This map has been produced to the latest known information at the time of issue, and has been produced for your information only.Please consult with the SPR GIS team to ensure the content is still current before using the information contained on this map.To the fullest extent permitted by law, we accept no responsibility or liability (whether in contract, tort (including negligence) or otherwise in respect of any errors or omissions in the information contained in the map and shall not be liable for any loss, damage or expense caused by such errors or omissions.
0A DRAFT FOR COMMENT25/08/16
EA1 DCO Boundary
Compound Area
HDD Zone
Horizontal Directional Drill (HDD) Compound Area
East Anglia ONE Offshore Windfarm November, 2016
Cable Method Statement
East Anglia ONE – EA1-CON-R-IBR-021238 Page 23
Appendix 2 Typical Construction CrossSections
1000 1000 1000 7000 1000 2000 MIN.5000 2000 2000 5500 2000 5000 1000 4000 1000 1000 1000
FENCE
GL
TEMP DRAIN
SUBSOILSTOCKPILE
TEMP DRAIN1750
1750
TEMPORARYACCESS ROAD
44500 CONSTRUCTION SWATHE
EA3
TOPSOILSTOCKPILE
TEMPORARY FOOTWAY
1000 1000 1000 7000 1000 2000 MIN. 5000 MIN.5000 2000 2000 4000 1000 1000 1000
SUBSOILSTOCKPILE
1750
1750
44500 CONSTRUCTION SWATHE
FENCE
GLEA1CC1
EA1CC2
TEMP DRAIN
FENCE
GL
FENCE
GL
TOPSOILSTOCKPILE
1000 1000 1000 2000
TEMP DRAIN TEMP DRAIN
TEMP DRAIN TEMP DRAIN
VIEW FROM SHORE LANDING TOWARDS SUBSTATIONS OPTION 1
TEMPORARY FOOTWAYEA3
TEMPORARYACCESS ROAD
1500 12000 6000 3500 3750 3750 3500 9000 1500
1500 12000 6000 6000 3500 3750 3750 6500 1500
VIEW FROM SHORE LANDING TOWARDS SUBSTATIONS OPTION 2
26500 TOPSOIL STRIP
21130 PERMANENT EASEMENT
NOTES:1- PASSING PLACES EACH 250 m.(FIG.1)2- TURN ARROUND AREAS EACH 750m. (FIG.2)3- "V" BUCKET MAY BE USED (SEE PHOTO)
30.0°
26500 TOPSOIL STRIP
12630 PERMANENT EASEMENT
"V" BUCKET
2000
0
1000
0
10000
ROAD
ROAD
FIGURE 1 FIGURE 2
30.0°
EA1CC1
EA1CC2
2500
1000 1000
30.0°
30.0°
30.0° 30.0°
5500
43 5 6 7 8 9 1021 11 12
43 5 6 7 8 9 1021 11 12
C
B
A
D
E
F
G
H
C
B
A
D
E
F
G
H
A2Contractors Drg. No. : Size:
Prepared Reviewed Approved
Date of First Issue:
Project:
Drg. No.: Rev:
All rights reserved. Total or partial reproduction of this drawing without authorisation of the proprietor is prohibited.
Client:
Contractor:
Scale:
Drg. Title:
Rev. Date Reason / Description of changes.Prepared Reviewed Approved
Sheet:
Next:
Location:
Status Stamp:
Status Stamp:
EAST ANGLIA
BAWDSEY TO BRAMFORD
CONSTRUCTION SWATHE
TYPICAL CROSS SECTION
EA1-GRD-E-IEC-0078831- 0
1:100IMFE GRAT FEDO
15-07-2016
EXCAVATED MATERIAL USED FORBACKFILLING AFTER TREATMENT IFNECESSARY
TILING AS PER NTGSCABLE PROTECTIVE COVERS
103/110mm UPVC PILOT DUCT WITH 2 No.30/35mm HDPE SUB DUCT FOR FO(GREEN uPVV)
WARNING TAPE
DTS CABLE IN 38/42mm PVC DUCT
PVC DUCT 188/200mm DUCT COLORS FORPOWER CABLES AND ECC (RED uPVC)
5000 mmMINIMUM CIRCUIT SEPARATION
200
560
80 80
7575
575
mm
1175
mm
Min
imum
cabl
e de
pth
100
Min
imun
cab
le d
epth
to th
eca
ble
top
1250
mm
20
20
5000 mmMINIMUM CIRCUIT SEPARATION1500
75
250
EXCAVATED MATERIAL USED FORBACKFILLING AFTER TREATMENT IFNECESSARY
WARNING TAPE
TILING AS PER NTGSCABLE PROTECTIVE COVERS
RED U-PVC DUCTS 250 OD /237 ID
DUCTS SURROUNDED BY CBS
103/110mm GREEN UPVC PILOT DUCT WITH2 No 30/35mm HDPE SUBDUCT FOR FO
700
100
75
Min.350(See Note 9)
175 175
Min
imun
cab
le d
epth
from
the
grou
nd to
the
duct
top
1250
mm
1125
mm
MIN
1800
mm
MIN
EXTRA DUCT
DC POLE 2
DC POLE 1675m
m
75
250EXCAVATED MATERIAL USED FORBACKFILLING AFTER TREATMENT IFNECESSARY
WARNING TAPE
TILING AS PER NTGSCABLE PROTECTIVE COVERS
RED U-PVC DUCTS 250 OD /237 ID
DUCTS SURROUNDED BY CBS
103/110mm GREEN UPVC PILOT DUCT WITH2 No 30/35mm HDPE SUBDUCT FOR FO
700
100
75
Min.350(See Note 9)
175 175
Min
imun
cab
le d
epth
from
the
grou
nd to
the
duct
top
1250
mm
EXTRA DUCT
DC POLE 2
DC POLE 1
43 5 6 7 8 9 1021 11 12
43 5 6 7 8 9 1021 11 12
C
B
A
D
E
F
G
H
C
B
A
D
E
F
G
H
A2Contractors Drg. No. : Size:
Prepared Reviewed Approved
Date of First Issue:
Project:
Drg. No.: Rev:
All rights reserved. Total or partial reproduction of this drawing without authorisation of the proprietor is prohibited.
Client:
Contractor:
Scale:
Drg. Title:
Rev. Date Reason / Description of changes.Prepared Reviewed Approved
Sheet:
Next:
Location:
Status Stamp:
Status Stamp:
EAST ANGLIA
BAWDSEY TO BRAMFORD
TYPICAL CROSS SECTION OF DC CABLE TRENCH
EA1-GRD-D-IB-0013021- 0
1:15IMFE GRAT FEDO
15/02/2016
East Anglia ONE Offshore Windfarm November, 2016
Cable Method Statement
East Anglia ONE – EA1-CON-R-IBR-021238 Page 24
Appendix 3 Construction Zones Plans
Zone 3Zone 2
Zone 1
34B
34B
35A
41
37C
37B
35D
35C35B
33C33B
36
39A
37A
37E
34A
37D
37D
38
39
35C
33A
609000
609000
609200
609200
609400
609400
609600
609600
609800
609800
610000
610000
610200
610200
610400
610400
610600
610600
610800
610800
611000
611000
611200
611200
611400
611400
611600
611600
611800
611800
612000
612000
612200
612200
612400
612400
612600
612600
612800
612800
613000
613000
613200
613200
2456
00
2456
00
2458
00
2458
00
2460
00
2460
00
2462
00
2462
00
2464
00
2464
00
2466
00
2466
00
2468
00
2468
00
2470
00
2470
00
2472
00
2472
00
2474
00
2474
00
2476
00
2476
00
2478
00
2478
00
2480
00
2480
00
2482
00
2482
00
2484
00
2484
00
2486
00
2486
00
2488
00
2488
00
2490
00
2490
00
2492
00
2492
00
2494
00
2494
00
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1:7,500
¯
Note:This map has been produced to the latest known information at the time of issue, and has been produced for your information only.Please consult with the SPR GIS team to ensure the content is still current before using the information contained on this map.To the fullest extent permitted by law, we accept no responsibility or liability (whether in contract, tort (including negligence) or otherwise in respect of any errors or omissions in the information contained in the map and shall not be liable for any loss, damage or expense caused by such errors or omissions.
DRAWING PREPARED BY:
ORIGINAL PLOT SIZE
ISSUE DRAWNDATE CHKD APPD
A1
REVISION NOTES
DRAWING TITLE
PROJECT TITLE
SCALE
DATUM
DRAWING NUMBER
UNITS
PURPOSE
DRAWING ID
COORDINATE SYSTEM PROJECTION
© Crown Copyright 2016. All rights reserved. Ordnance Survey Licence 0100031673.
of 9
0 250 500 m
OSGB 1936BNG TRANSVERSE MERCATOR
METRE
FOR INFORMATION
EA ONE ONSHORE CABLE
CONSTRUCTION ZONES
EA1-GRD-DG-IEC-008156 Rev 1
LEGEND
1
EA1 Construction CorridorEA1 DCO BoundaryHorizontal Directional Drill (HDD)Compound AreasCompound AreaConstruction Zones
WorkPlan
33A
33B
33C
34A
34B
35A
35B
35C
35D
36
37A
37B
37C
37D
37E
38
39
39A
41
1 FOR INFORMATION31/10/16
PREP
SF CD GRAT FEDO
Zone 4Zone 3
34B
34B
35A
35C35B
33C
33B
34A
32
33A
612200
612200
612400
612400
612600
612600
612800
612800
613000
613000
613200
613200
613400
613400
613600
613600
613800
613800
614000
614000
614200
614200
614400
614400
614600
614600
614800
614800
615000
615000
615200
615200
615400
615400
615600
615600
615800
615800
616000
616000
616200
616200
616400
616400
616600
616600
2466
00
2466
00
2468
00
2468
00
2470
00
2470
00
2472
00
2472
00
2474
00
2474
00
2476
00
2476
00
2478
00
2478
00
2480
00
2480
00
2482
00
2482
00
2484
00
2484
00
2486
00
2486
00
2488
00
2488
00
2490
00
2490
00
2492
00
2492
00
2494
00
2494
00
2496
00
2496
00
2498
00
2498
00
2500
00
2500
00
2502
00
2502
00
2504
00
2504
00
pw:\\FGDPRODPWV8.euro.iberdrola.local:UKRENEW\Documents\UK%20Offshore\3%20-%20PROJECTS\EA1%20Grid%20Package\03%20ONSHORE%20CABLE\02%20ENGINEERING%20DESIGN\01%20Technical%20Documentation\07%20GIS\01%20Drawings\
1:7,500
¯
Note:This map has been produced to the latest known information at the time of issue, and has been produced for your information only.Please consult with the SPR GIS team to ensure the content is still current before using the information contained on this map.To the fullest extent permitted by law, we accept no responsibility or liability (whether in contract, tort (including negligence) or otherwise in respect of any errors or omissions in the information contained in the map and shall not be liable for any loss, damage or expense caused by such errors or omissions.
DRAWING PREPARED BY:
ORIGINAL PLOT SIZE
ISSUE DRAWNDATE CHKD APPD
A1
REVISION NOTES
DRAWING TITLE
PROJECT TITLE
SCALE
DATUM
DRAWING NUMBER
UNITS
PURPOSE
DRAWING ID
COORDINATE SYSTEM PROJECTION
© Crown Copyright 2016. All rights reserved. Ordnance Survey Licence 0100031673.
of 9
0 250 500 m
OSGB 1936BNG TRANSVERSE MERCATOR
METRE
FOR INFORMATION
EA ONE ONSHORE CABLE
CONSTRUCTION ZONES
EA1-GRD-DG-IEC-008156 Rev 1
LEGEND
2
EA1 Construction CorridorEA1 DCO BoundaryHorizontal Directional Drill (HDD)Compound AreasCompound AreaConstruction Zones
WorkPlan
32
33A
33B
33C
34A
34B
35A
35B
35C
1 FOR INFORMATION31/10/16
PREP
SF CD GRAT FEDO
Zone 5Zone 4
30B
31
30A
29
32
616200
616200
616400
616400
616600
616600
616800
616800
617000
617000
617200
617200
617400
617400
617600
617600
617800
617800
618000
618000
618200
618200
618400
618400
618600
618600
618800
618800
619000
619000
619200
619200
619400
619400
619600
619600
619800
619800
620000
620000
620200
620200
620400
620400
2466
00
2466
00
2468
00
2468
00
2470
00
2470
00
2472
00
2472
00
2474
00
2474
00
2476
00
2476
00
2478
00
2478
00
2480
00
2480
00
2482
00
2482
00
2484
00
2484
00
2486
00
2486
00
2488
00
2488
00
2490
00
2490
00
2492
00
2492
00
2494
00
2494
00
2496
00
2496
00
2498
00
2498
00
2500
00
2500
00
2502
00
2502
00
2504
00
2504
00
pw:\\FGDPRODPWV8.euro.iberdrola.local:UKRENEW\Documents\UK%20Offshore\3%20-%20PROJECTS\EA1%20Grid%20Package\03%20ONSHORE%20CABLE\02%20ENGINEERING%20DESIGN\01%20Technical%20Documentation\07%20GIS\01%20Drawings\
1:7,500
¯
Note:This map has been produced to the latest known information at the time of issue, and has been produced for your information only.Please consult with the SPR GIS team to ensure the content is still current before using the information contained on this map.To the fullest extent permitted by law, we accept no responsibility or liability (whether in contract, tort (including negligence) or otherwise in respect of any errors or omissions in the information contained in the map and shall not be liable for any loss, damage or expense caused by such errors or omissions.
DRAWING PREPARED BY:
ORIGINAL PLOT SIZE
ISSUE DRAWNDATE CHKD APPD
A1
REVISION NOTES
DRAWING TITLE
PROJECT TITLE
SCALE
DATUM
DRAWING NUMBER
UNITS
PURPOSE
DRAWING ID
COORDINATE SYSTEM PROJECTION
© Crown Copyright 2016. All rights reserved. Ordnance Survey Licence 0100031673.
of 9
0 250 500 m
OSGB 1936BNG TRANSVERSE MERCATOR
METRE
FOR INFORMATION
EA ONE ONSHORE CABLE
CONSTRUCTION ZONES
EA1-GRD-DG-IEC-008156 Rev 1
LEGEND
3
EA1 Construction CorridorEA1 DCO BoundaryCompound AreaConstruction Zones
WorkPlan
29
30A
30B
31
32
1 FOR INFORMATION31/10/16
PREP
SF CD GRAT FEDO
Zone 6
Zone 5
Zone 5
26
25C
28A
28B
25A
2729
619800
619800
620000
620000
620200
620200
620400
620400
620600
620600
620800
620800
621000
621000
621200
621200
621400
621400
621600
621600
621800
621800
622000
622000
622200
622200
622400
622400
622600
622600
622800
622800
623000
623000
623200
623200
623400
623400
623600
623600
623800
623800
624000
624000
2466
00
2466
00
2468
00
2468
00
2470
00
2470
00
2472
00
2472
00
2474
00
2474
00
2476
00
2476
00
2478
00
2478
00
2480
00
2480
00
2482
00
2482
00
2484
00
2484
00
2486
00
2486
00
2488
00
2488
00
2490
00
2490
00
2492
00
2492
00
2494
00
2494
00
2496
00
2496
00
2498
00
2498
00
2500
00
2500
00
2502
00
2502
00
2504
00
2504
00
pw:\\FGDPRODPWV8.euro.iberdrola.local:UKRENEW\Documents\UK%20Offshore\3%20-%20PROJECTS\EA1%20Grid%20Package\03%20ONSHORE%20CABLE\02%20ENGINEERING%20DESIGN\01%20Technical%20Documentation\07%20GIS\01%20Drawings\
1:7,500
¯
Note:This map has been produced to the latest known information at the time of issue, and has been produced for your information only.Please consult with the SPR GIS team to ensure the content is still current before using the information contained on this map.To the fullest extent permitted by law, we accept no responsibility or liability (whether in contract, tort (including negligence) or otherwise in respect of any errors or omissions in the information contained in the map and shall not be liable for any loss, damage or expense caused by such errors or omissions.
DRAWING PREPARED BY:
ORIGINAL PLOT SIZE
ISSUE DRAWNDATE CHKD APPD
A1
REVISION NOTES
DRAWING TITLE
PROJECT TITLE
SCALE
DATUM
DRAWING NUMBER
UNITS
PURPOSE
DRAWING ID
COORDINATE SYSTEM PROJECTION
© Crown Copyright 2016. All rights reserved. Ordnance Survey Licence 0100031673.
of 9
0 250 500 m
OSGB 1936BNG TRANSVERSE MERCATOR
METRE
FOR INFORMATION
EA ONE ONSHORE CABLE
CONSTRUCTION ZONES
EA1-GRD-DG-IEC-008156 Rev 1
LEGEND
4
EA1 Construction CorridorEA1 DCO BoundaryCompound AreaConstruction Zones
WorkPlan
25A
25C
26
27
28A
28B
29
1 FOR INFORMATION31/10/16
PREP
SF CD GRAT FEDO
Zone 7
Zone 6
19
21
26
22A
20
22B
25C
25B
23A
21A
23C
18
25A
23B
23B
24 24
24
24A
24A
24A
623000
623000
623200
623200
623400
623400
623600
623600
623800
623800
624000
624000
624200
624200
624400
624400
624600
624600
624800
624800
625000
625000
625200
625200
625400
625400
625600
625600
625800
625800
626000
626000
626200
626200
626400
626400
626600
626600
626800
626800
627000
627000
627200
627200
627400
627400
2466
00
2466
00
2468
00
2468
00
2470
00
2470
00
2472
00
2472
00
2474
00
2474
00
2476
00
2476
00
2478
00
2478
00
2480
00
2480
00
2482
00
2482
00
2484
00
2484
00
2486
00
2486
00
2488
00
2488
00
2490
00
2490
00
2492
00
2492
00
2494
00
2494
00
2496
00
2496
00
2498
00
2498
00
2500
00
2500
00
2502
00
2502
00
2504
00
2504
00
pw:\\FGDPRODPWV8.euro.iberdrola.local:UKRENEW\Documents\UK%20Offshore\3%20-%20PROJECTS\EA1%20Grid%20Package\03%20ONSHORE%20CABLE\02%20ENGINEERING%20DESIGN\01%20Technical%20Documentation\07%20GIS\01%20Drawings\
1:7,500
¯
Note:This map has been produced to the latest known information at the time of issue, and has been produced for your information only.Please consult with the SPR GIS team to ensure the content is still current before using the information contained on this map.To the fullest extent permitted by law, we accept no responsibility or liability (whether in contract, tort (including negligence) or otherwise in respect of any errors or omissions in the information contained in the map and shall not be liable for any loss, damage or expense caused by such errors or omissions.
DRAWING PREPARED BY:
ORIGINAL PLOT SIZE
ISSUE DRAWNDATE CHKD APPD
A1
REVISION NOTES
DRAWING TITLE
PROJECT TITLE
SCALE
DATUM
DRAWING NUMBER
UNITS
PURPOSE
DRAWING ID
COORDINATE SYSTEM PROJECTION
© Crown Copyright 2016. All rights reserved. Ordnance Survey Licence 0100031673.
of 9
0 250 500 m
OSGB 1936BNG TRANSVERSE MERCATOR
METRE
FOR INFORMATION
EA ONE ONSHORE CABLE
CONSTRUCTION ZONES
EA1-GRD-DG-IEC-008156 Rev 1
LEGEND
5
EA1 Construction CorridorEA1 DCO BoundaryHorizontal Directional Drill (HDD)Compound AreasCompound AreaConstruction Zones
WorkPlan
18
19
20
21
21A
22A
22B
23A
23B
23C
24
24A
25A
25B
25C
26
1 FOR INFORMATION31/10/16
PREP
SF CD GRAT FEDO
Zone 9
Zone 8
Zone 719
16
20
17
15
18
624000
624000
624200
624200
624400
624400
624600
624600
624800
624800
625000
625000
625200
625200
625400
625400
625600
625600
625800
625800
626000
626000
626200
626200
626400
626400
626600
626600
626800
626800
627000
627000
627200
627200
627400
627400
627600
627600
627800
627800
628000
628000
628200
628200
628400
628400
2434
00
2434
00
2436
00
2436
00
2438
00
2438
00
2440
00
2440
00
2442
00
2442
00
2444
00
2444
00
2446
00
2446
00
2448
00
2448
00
2450
00
2450
00
2452
00
2452
00
2454
00
2454
00
2456
00
2456
00
2458
00
2458
00
2460
00
2460
00
2462
00
2462
00
2464
00
2464
00
2466
00
2466
00
2468
00
2468
00
2470
00
2470
00
2472
00
2472
00
pw:\\FGDPRODPWV8.euro.iberdrola.local:UKRENEW\Documents\UK%20Offshore\3%20-%20PROJECTS\EA1%20Grid%20Package\03%20ONSHORE%20CABLE\02%20ENGINEERING%20DESIGN\01%20Technical%20Documentation\07%20GIS\01%20Drawings\
1:7,500
¯
Note:This map has been produced to the latest known information at the time of issue, and has been produced for your information only.Please consult with the SPR GIS team to ensure the content is still current before using the information contained on this map.To the fullest extent permitted by law, we accept no responsibility or liability (whether in contract, tort (including negligence) or otherwise in respect of any errors or omissions in the information contained in the map and shall not be liable for any loss, damage or expense caused by such errors or omissions.
DRAWING PREPARED BY:
ORIGINAL PLOT SIZE
ISSUE DRAWNDATE CHKD APPD
A1
REVISION NOTES
DRAWING TITLE
PROJECT TITLE
SCALE
DATUM
DRAWING NUMBER
UNITS
PURPOSE
DRAWING ID
COORDINATE SYSTEM PROJECTION
© Crown Copyright 2016. All rights reserved. Ordnance Survey Licence 0100031673.
of 9
0 250 500 m
OSGB 1936BNG TRANSVERSE MERCATOR
METRE
FOR INFORMATION
EA ONE ONSHORE CABLE
CONSTRUCTION ZONES
EA1-GRD-DG-IEC-008156 Rev 1
LEGEND
6
EA1 Construction CorridorEA1 DCO BoundaryHorizontal Directional Drill (HDD)Compound AreasCompound AreaConstruction Zones
WorkPlan
15
16
17
18
19
20
1 FOR INFORMATION31/10/16
PREP
SF CD GRAT FEDO
Zone 10
Zone 9
14
16
10B
11
13
12
17
10A
15
624400
624400
624600
624600
624800
624800
625000
625000
625200
625200
625400
625400
625600
625600
625800
625800
626000
626000
626200
626200
626400
626400
626600
626600
626800
626800
627000
627000
627200
627200
627400
627400
627600
627600
627800
627800
628000
628000
628200
628200
628400
628400
628600
628600
628800
628800
2402
00
2402
00
2404
00
2404
00
2406
00
2406
00
2408
00
2408
00
2410
00
2410
00
2412
00
2412
00
2414
00
2414
00
2416
00
2416
00
2418
00
2418
00
2420
00
2420
00
2422
00
2422
00
2424
00
2424
00
2426
00
2426
00
2428
00
2428
00
2430
00
2430
00
2432
00
2432
00
2434
00
2434
00
2436
00
2436
00
2438
00
2438
00
2440
00
2440
00
pw:\\FGDPRODPWV8.euro.iberdrola.local:UKRENEW\Documents\UK%20Offshore\3%20-%20PROJECTS\EA1%20Grid%20Package\03%20ONSHORE%20CABLE\02%20ENGINEERING%20DESIGN\01%20Technical%20Documentation\07%20GIS\01%20Drawings\
1:7,500
¯
Note:This map has been produced to the latest known information at the time of issue, and has been produced for your information only.Please consult with the SPR GIS team to ensure the content is still current before using the information contained on this map.To the fullest extent permitted by law, we accept no responsibility or liability (whether in contract, tort (including negligence) or otherwise in respect of any errors or omissions in the information contained in the map and shall not be liable for any loss, damage or expense caused by such errors or omissions.
DRAWING PREPARED BY:
ORIGINAL PLOT SIZE
ISSUE DRAWNDATE CHKD APPD
A1
REVISION NOTES
DRAWING TITLE
PROJECT TITLE
SCALE
DATUM
DRAWING NUMBER
UNITS
PURPOSE
DRAWING ID
COORDINATE SYSTEM PROJECTION
© Crown Copyright 2016. All rights reserved. Ordnance Survey Licence 0100031673.
of 9
0 250 500 m
OSGB 1936BNG TRANSVERSE MERCATOR
METRE
FOR INFORMATION
EA ONE ONSHORE CABLE
CONSTRUCTION ZONES
EA1-GRD-DG-IEC-008156 Rev 1
LEGEND
7
EA1 Construction CorridorEA1 DCO BoundaryHorizontal Directional Drill (HDD)Compound AreasCompound AreaConstruction Zones
WorkPlan
10A
10B
11
12
13
14
15
16
17
1 FOR INFORMATION31/10/16
PREP
SF CD GRAT FEDO
Zone 11
Zone 10
9
14
10B
11
8
13
12
10A
5
7B
7A
627200
627200
627400
627400
627600
627600
627800
627800
628000
628000
628200
628200
628400
628400
628600
628600
628800
628800
629000
629000
629200
629200
629400
629400
629600
629600
629800
629800
630000
630000
630200
630200
630400
630400
630600
630600
630800
630800
631000
631000
631200
631200
631400
631400
631600
631600
2376
00
2376
00
2378
00
2378
00
2380
00
2380
00
2382
00
2382
00
2384
00
2384
00
2386
00
2386
00
2388
00
2388
00
2390
00
2390
00
2392
00
2392
00
2394
00
2394
00
2396
00
2396
00
2398
00
2398
00
2400
00
2400
00
2402
00
2402
00
2404
00
2404
00
2406
00
2406
00
2408
00
2408
00
2410
00
2410
00
2412
00
2412
00
2414
00
2414
00
pw:\\FGDPRODPWV8.euro.iberdrola.local:UKRENEW\Documents\UK%20Offshore\3%20-%20PROJECTS\EA1%20Grid%20Package\03%20ONSHORE%20CABLE\02%20ENGINEERING%20DESIGN\01%20Technical%20Documentation\07%20GIS\01%20Drawings\
1:7,500
¯
Note:This map has been produced to the latest known information at the time of issue, and has been produced for your information only.Please consult with the SPR GIS team to ensure the content is still current before using the information contained on this map.To the fullest extent permitted by law, we accept no responsibility or liability (whether in contract, tort (including negligence) or otherwise in respect of any errors or omissions in the information contained in the map and shall not be liable for any loss, damage or expense caused by such errors or omissions.
DRAWING PREPARED BY:
ORIGINAL PLOT SIZE
ISSUE DRAWNDATE CHKD APPD
A1
REVISION NOTES
DRAWING TITLE
PROJECT TITLE
SCALE
DATUM
DRAWING NUMBER
UNITS
PURPOSE
DRAWING ID
COORDINATE SYSTEM PROJECTION
© Crown Copyright 2016. All rights reserved. Ordnance Survey Licence 0100031673.
of 9
0 250 500 m
OSGB 1936BNG TRANSVERSE MERCATOR
METRE
FOR INFORMATION
EA ONE ONSHORE CABLE
CONSTRUCTION ZONES
EA1-GRD-DG-IEC-008156 Rev 1
LEGEND
8
EA1 Construction CorridorEA1 DCO BoundaryHorizontal Directional Drill (HDD)Compound AreasCompound AreaConstruction Zones
WorkPlan
10A
10B
11
12
13
14
5
7A
7B
8
9
1 FOR INFORMATION31/10/16
PREP
SF CD GRAT FEDO
Zone 11
Zone 11
3A
4
6
3C
5
7B
7A
3B
631000
631000
631200
631200
631400
631400
631600
631600
631800
631800
632000
632000
632200
632200
632400
632400
632600
632600
632800
632800
633000
633000
633200
633200
633400
633400
633600
633600
633800
633800
634000
634000
634200
634200
634400
634400
634600
634600
634800
634800
635000
635000
635200
635200
635400
635400
2380
00
2380
00
2382
00
2382
00
2384
00
2384
00
2386
00
2386
00
2388
00
2388
00
2390
00
2390
00
2392
00
2392
00
2394
00
2394
00
2396
00
2396
00
2398
00
2398
00
2400
00
2400
00
2402
00
2402
00
2404
00
2404
00
2406
00
2406
00
2408
00
2408
00
2410
00
2410
00
2412
00
2412
00
2414
00
2414
00
2416
00
2416
00
2418
00
2418
00
pw:\\FGDPRODPWV8.euro.iberdrola.local:UKRENEW\Documents\UK%20Offshore\3%20-%20PROJECTS\EA1%20Grid%20Package\03%20ONSHORE%20CABLE\02%20ENGINEERING%20DESIGN\01%20Technical%20Documentation\07%20GIS\01%20Drawings\
1:7,500
¯
Note:This map has been produced to the latest known information at the time of issue, and has been produced for your information only.Please consult with the SPR GIS team to ensure the content is still current before using the information contained on this map.To the fullest extent permitted by law, we accept no responsibility or liability (whether in contract, tort (including negligence) or otherwise in respect of any errors or omissions in the information contained in the map and shall not be liable for any loss, damage or expense caused by such errors or omissions.
DRAWING PREPARED BY:
ORIGINAL PLOT SIZE
ISSUE DRAWNDATE CHKD APPD
A1
REVISION NOTES
DRAWING TITLE
PROJECT TITLE
SCALE
DATUM
DRAWING NUMBER
UNITS
PURPOSE
DRAWING ID
COORDINATE SYSTEM PROJECTION
© Crown Copyright 2016. All rights reserved. Ordnance Survey Licence 0100031673.
of 9
0 250 500 m
OSGB 1936BNG TRANSVERSE MERCATOR
METRE
FOR INFORMATION
EA ONE ONSHORE CABLE
CONSTRUCTION ZONES
EA1-GRD-DG-IEC-008156 Rev 1
LEGEND
9
EA1 Construction CorridorEA1 DCO BoundaryHorizontal Directional Drill (HDD)Compound AreasCompound AreaConstruction Zones
WorkPlan
3A
3B
3C
4
5
6
7A
7B
1 FOR INFORMATION31/10/16
PREP
SF CD GRAT FEDO