SHEPD

Section ID 153

Scottish Hydro Electric Power Distribution Project Description - Emergency Replacement

Project Description

Contents

Definitions and Abbreviations ...... 3

1. Introduction ...... 4

2. Background ...... 6

3. Proposed cable construction ...... 7

4. Pre-installation survey requirements ...... 8

5. Project description ...... 9 5.1. The existing route ...... 9 5.2. The proposed route ...... 9 5.3. The proposed installation and protection methods ...... 13 5.4. The proposed delivery programme...... 16

6. Unexploded ordinance strategy ...... 17

Appendix A: Cable corridor ...... 18

Appendix B: Proposed cable installation programme ...... 29

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Project Description

Definitions and Abbreviations

The following definitions are used within this document:

SSEN Scottish and Southern Electricity Networks SHEPD Scottish Hydro Electric Power Distribution plc Cable SHEPD submarine electricity cable network

The following abbreviations and definitions may be used within this document:

AtoN Aid to Navigation CLV Cable Lay Vessel DSV Dive Support Vessel DWA Double Wire Armoured HDD Horizontal Directional Drilling HVAC High-Voltage Alternating Current kV kilovolt MAIB Marine Accident Investigation Branch MHWS Mean High Water Springs ML Marine Licence MLWS Mean Low Water Springs MSL Mean Sea Level ODN Ordnance Datum Newlyn PAC Pre-Application Consultation PPY Poly Propylene Yarn PSD Particle Size Distribution ROV Remotely Operated Vehicle RPL Route Position List SNH Scottish Natural Heritage UXO Unexploded Ordinance XLPE Cross Linked Polyethylene

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1. Introduction

1.1. Scottish Hydro Electric Power Distribution plc (SHEPD) holds a licence under the Electricity Act 1989 for the distribution of electricity in the north of including the Islands. It has a statutory duty to provide an economic and efficient system for the distribution of electricity and to ensure that its assets are maintained so as to ensure a safe, secure and reliable supply to customers.

1.2. The existing 33kV submarine electricity cable from Bay of Crook in Shapinsay to Bay of Holland in Stronsay within the Isles was identified as nearing the end of its operational life and an engineering solution was proposed and consulted on between 2016 and 2018. Initially, SHEPD proposed to Horizontally Directional Drill (HDD) from the islands of Shapinsay and Stronsay, through the bedrock to come out in the seabed where the cable would be pulled through the ducts and surface laid on the seabed between them. It was this solution that our Pre-Application Consultation Report mainly considers. SHEPD did not apply for a licence on the basis of this solution because feasibility studies are still being conducted and are not yet complete.

1.3. However, On Saturday 12 May 2018 at 15:08 the Shapinsay Stronsay submarine electricity cable faulted leaving 970 customers without power. Supplies were restored to all these customers by 22:40 on the same day via the 33kV Orkney circuit but this reduces the security of supply to the islands of , , , Sanday, Stronsay and Shapinsay. The security of supply to the islands of and are also now impacted due to the fault on Shapinsay Stronsay. Figure 1 shows the 33kV distribution network interconnection between these islands.

Figure 1 Orkney 33kV Electricity Distribution Network

1.4. Inaddition to this a further two, non-submarine electricity cable faults, occurred on the 28 May 2018 which impacted on supplies to all Orkney customers. The inability to reconfigure the network is severely restricted by the current Shapinsay Stronsay cable fault. This has resulted in increased

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Project Description

reliance upon fossil fuels to maintain electricity supplies to the islands through the use of mobile generators and the embedded power station at . This places the network at significant risk if any further on land or submarine electricity cables develop a fault.

1.5. Furthermore, as a consequence of the Shapinsay Stronsay submarine electricity cable fault; a number of renewable generators’ export capabilities have been constrained. This has had an impact on the local economy.

1.6. Due to the overriding public interest to replace the Shapinsay Stronsay cable, as soon as possible, we now propose to replace the cable by connecting into the existing onshore infrastructure. The cable will initially be surface laid within the marine environment and then post protected using burial, rock filter bags, concrete mattresses and split pipe to both protect and stabilise the cable. This document provides a description of the proposed project, detailing the physical construction of the cable, the routeing, method of installation and operation of the cable.

1.7. This document should be read in conjunction with the following documents:

. Marine Licence Application Form . Pre-Application Consultation Report (appended by Cost Benefit Analysis Model) . Environmental Supporting Information . Fishing Liaison Mitigation Action Plan (covering all legitimate sea users) . Construction Environment Management Plan . Operation, Inspection, Maintenance and Decommissioning Strategy

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2. Background

2.1. The existing cable (Figure 2) was installed in 1992 and had already been identified as nearing the end of its operational life. This has been verified through our existing asset records and following recent visual inspections by ROV on the cable. In addition to this, the cable has been repaired since installation and contains five subsea repair joints making further repair difficult. Due to the recent faults, prioritising the emergency replacement of this cable is essential to secure power supplies to the islands.

Figure 2 Existing Shapinsay Stronsay cable route (highlighted in red)

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3. Proposed cable construction

3.1. Electricity will be transmitted using HVAC submarine cable technology. The typical cable structure is shown in Figure 3.

3.2. The proposed submarine cable consists of a three core design with copper round compacted stranded conductors, XLPE insulation, copper polyethylene laminated tape, polyethylene sheath, PPY, double galvanized steel wire armour, PPY, with one interstitial armoured optical fibre cable. The cable is rated at 33 kV HVAC, with an outer diameter of 127 mm and weight of 28.8 kg/m in water. The proposed cable construction is shown in Figure 4.

3.3. The three core design minimises the resultant electric and magnetic fields produced from the cable during operation. This is further reduced by balancing of the loads within each of the cable’s individual phases.

3.4. The proposed double wired armour (DWA) construction will provide the cable with additional mechanical protection and will also help reduce the resultant electric and magnetic fields generated during operation of the cable in comparison with single wired Figure 3 Typical XLPE HVAC submarine cable structure armour (SWA) cable constructions. (Source: ABB) 3.5. Fibre optics will be installed integral to the submarine cable for the purpose of cable condition monitoring, control and power system protection.

3.6. The submarine cable conductor specification and power rating has been selected through assessment of historic demand on the existing SHEPD network and with consideration of future customer demand growth on the network.

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1 Copper stranded conductors 2 Semiconductive waterblocking tape 3 Non-metallic screen 4 XLPE insulation 5 Non-metallic screen 6 Semiconductive waterblocking tape 7 Metallic screen 8 HDPE sheath 9 Non-hydroscopic fillers 10 Binding tape 11 PPY separator layer 12 Inner layer of galvanized steel armouring 13 PPY separator layer 14 Outer layer of galvanized steel armouring 15 PPY outer layers 16 Fibre optic Figure 4 Typical XLPE HVAC submarine cable structure

4. Pre-installation survey requirements

4.1. Marine surveys were undertaken between September 2015 and October 2015 in order to confirm the viability of the proposed new cable route in relation to seabed conditions, bathymetry and any other seabed features. Geophysical and limited geotechnical marine surveys were undertaken over a 1,000 m wide corridor centred along the existing cable route. The main objectives of the marine surveys were to identify:

. seabed conditions (e.g. sand, rock, mud) to optimise the proposed marine route corridor (avoidance of rock outcrops) . potential geological constraints, such as dykes, rock pinnacles, sand waves, incised channels etc. . locations of potential engineering constraints and/or safety hazards, such as existing pipelines and cables either in service or out of service, wrecks, marine debris, UXO etc. . areas of potential biological and ecological importance (such as biogenic and rocky reefs, priority marine features etc.) to allow habitat mapping and inform the requirement for additional surveys and assessment. 4.2. The surveyed corridor was centred along the existing cable route and was selected following a review of potential cable landing points, current and proposed sea user activities.

4.3. However, due to the emergency nature of this cable replacement it is proposed to utilise the existing shore ends and to maintain a route as close to the existing cable as possible; rather than progressing an HDD shore end solution that was discussed at the Pre-Application Consultation Events. This led to a second route survey which was undertaken May 2017, following the fault, along the existing cable and 200m to the south.

4.4. The resulting sonar mapping and video survey of the marine environment have confirmed a viable replacement cable route within this corridor. The bathymetric data along the surveyed route (Figure

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5) has highlighted significant rock outcrops and a shallow bank just south of Stronsay. Dowie Sand is a shallow bank which cannot be avoided; as such the cable will be routed to the southernmost extent so that it is within the deepest available water. The Baas of Linton (3km east of Shapinsay) will be avoided as far as possible. Between these points the cable will lie within water depths of 25- 40 m. British Geological Survey data and ROV footage identifies a very shallow layer of sediment overlying rock formation, and so burial is expected to be very challenging in these areas. The existing cable is still visible although partially self-buried. There was no physical evidence of previously recorded horse mussel beds along the route, although should any be found during the pre-lay ROV survey they will be micro-routed around where possible within the corridor width.

Figure 5 Bathymetric Survey Data

5. Project description

5.1. The existing route

5.1.1. The project aim is to install a replacement 33kV distribution cable from Bay of Crook in Shapinsay to Bay of Holland in Stronsay within the Orkney Isles. At each shore end landfall, the existing land- based network of overhead line and underground cable will be utilised to connect the submarine cable into to minimise the energisation time as much as possible and ensure a safe, secure and reliable supply.

5.2. The proposed route

5.2.1. Following a review of pre-installation marine survey data, an optimum route for the cable utilising the marine survey corridor has been identified. The application length for the proposed cable will be 16 km in length between the two transition joints, which are located inshore from the MHWS limit. This allows for obstacle avoidance during the cable lay and tolerances with the cable lay operations.

5.2.2. The proposed cable retains the existing shore end landfall at Bay of Crook, Shapinsay and Bay of Holland, Stronsay. The existing landfalls are suitable, evidenced by the faulted cable enduring over 25 years of operation. However, to maximise lift expectancy for the new cable we propose to protect with split pipe protection for the rocky intertidal areas (as shown in Figures 6 and 7); a combination of split pipe and concrete mattressing in the shallower areas down to the 10m water depth; and rock filter bags in the deeper sections of the route.

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Figure 6 Shapinsay Shore End

Figure 7 Stronsay Shore End

5.2.3. The proposed cable will be offset by a minimum of 100 m and a maximum of 200 m from the faulted cable (Error! Reference source not found.). This will ensure the safe inspection and maintenance of the cable during the operation of the cable. The proposed cable route lies within

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this survey corridor with some micro-routeing selected to avoid areas of significant bedrock, boulders and to avoid or minimise the impact on sensitive marine features identified from the marine surveys. beds and sandeels, both designated as PMFs, have been identified in the immediate vicinity of the survey area, along with reefs and sandbanks, both Annex I listed habitats. For further information refer to the Environmental Supporting Information section 4.4.1.2.

5.2.4. There is one designated protected site with marine components located in the immediate vicinity of the replacement cable route and landfall locations, namely the Greenli Ness seal haul-out. The site is designated for harbour seal Phoca vitulina and Halichoerus grypus, listed on the Annex II of the Habitats Directive. Grey and harbour seals could be disturbed from their haul due to activities in adjacent waters – however the vessels involved in the cable replacement works will not require to move this far from the work area therefore no impacts are predicted.

5.2.5. No marine cultural heritage statutory designations have been identified in the works area; the nearest designated sites are the wrecks of the High Seas Fleet in that are protected under the Ancient Monuments and Archaeology Areas Act 1979.

5.2.6. As it is proposed to re-use the existing shore end landfall positions, the existing AtoN warning beacon locations will be retained. Ongoing maintenance and inspections associated with the warning beacon will be carried out in accordance with our Operation, Inspection, Maintenance and Decommissioning Strategy to ensure they are in good condition for sea user safety .

5.2.7. Appendix A shows the 200m corridor in which the proposed cable will be laid. This is to enable micro-routeing where required.

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Figure 8 Shapinsay Stronsay proposed cable corridor

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5.3. The proposed installation and protection methods

5.3.1. For cable laying activities, a CLV will be used to lay and bury (where technically feasible); with additional smaller support vessels used in the shallower shore locations. There will be a multicat acting as a dive support vessel (DSV) that will require a single 1 tonne anchor, positioned in the nearshore area. A guard vessel is also likely to be used during the cable lay operations in order to ensure other vessels remain outside the area of operations to reduce collision risk.

5.3.2. The cable installation method within the marine environment from each MLWS location will initially be surface laid across the length of the route. The proposed route is subject to strong tidal currents resulting in a rocky seabed with very little overlying sediment. With the limited sediment, full cable burial will not be possible. By initially surface laying the cable, the footprint is minimised but cable mobility on the sea bed may increase the footprint and impact on the seabed habitat.

5.3.3. Therefore, in areas where there is sediment suitable for burial along the route, post lay jetting of the cable to a target depth of cover of 0.75 m to bury the cable will be targeted. This is for cable protection and stability but also compliance with Scotland’s National Marine Plan Cables Policy 2. It is expected that some burial will be achieved between the Shapinsay shore end and the Baas of Linton. In addition the survey data we have suggests suitable sediment for burial exists in areas before and after Dowie Sand – on the approach to the Stronsay shore end. A maximum of 32% of the route length is predicted for cable burial. The extent of burial may be reduced due to tolerances with the cable lay, engineering difficulties and differing levels of sediment onsite at the time of the burial operations.

5.3.4. Where cable mobility is a concern, for both damage to the cable and scarring of the seabed SHEPD plan to lay rock filter bags (each with a seabed footprint of approximately 2.0 m by 2.0 m) and mattresses (each with a seabed footprint of approximately 3.0 m by 6.0 m) in spot locations on top of the cable to pin the cable to the seabed. Only clean washed stone will be used to fill the rock filter bags. Each bag shall be no more than 1 m high when installed. The rock filter bags have been proven to provide a habitat for aquatic species and mould to the seabed contours where installed. The quantity of these rock filter bags, mattresses and split pipe protection will be subject to cable stability analysis and will consider the level of cable burial feasible along the route. The installation of rock filter bags, concrete mattressing and split pipe are primarily used to stabilise the cable but will also reduce the likelihood of freespans along the route.

5.3.5. The cable stability assessment will inform the post lay protection undertaken. This will include the number of rock filter bags and mattresses, and their location in order to pin the cable based on the level of burial achieved. However, our initial assessment of the deposits to the seabed are:

. at the Shapinsay shore end it will be necessary to protect the first 300m of cable with a combination of split pipe and mattress protection

. from Kilometre Point (Kp) 0.3 for the next 250m it is expected that rock filter bags will be required with 50m spacing to a maximum of 6 rock filter bags. In this location the water depth is a minimum of 10m

. at the Baas of Linton, on the approach to Shapinsay, the water depth reduces, exposing the cable to increased wave action. It may be necessary to install rock filter bags here every 50m for a 1km length to a maximum of 21 rock filter bags.

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. in the centre of the channel it is not expected to need any rock filter bags for stabilisation, but pending the results of stability analysis, and micro routing to a maximum of 20 rock filter bags

. across Dowie Sand due to the shallower water, and therefore increased wave action that the cable is exposed to the cable should be stabilised in this location. It is proposed to install rock bags every 50m for a 0.5km length to a maximum of 11 rock filter bags.

. at the Stronsay end where the new cable route is known to run across rocks, and taking previous faults of the original cable into account it is expected that the cable will need to be stabilised for the first 2km offshore. It is proposed to install rock filter bags every 50m for this length to a maximum of 27 rock filter bags. The first 700m of this will be protected using split pipe and mattresses because of water depth.

5.3.6. A post lay inspection of the cable after it is installed will identify the potential risk to placement of the rock filter bags or mattresses directly onto the cable and confirm exact locations to avoid creating suspensions of the cable. To reduce the risk to mariners in the shallow areas (of less than 10m chart datum) along the route; rock filter bags will not be installed in depths of less than 10m to avoid reducing chart datum water depths by more than 5% in line with Maritime and Coastguard Agency Pre-Application Consultation advice. Similarly mattresses will only be placed in the shallow areas (less than 10m water depth) where water depths will not be reduced by greater than 5%.

5.3.7. There are no foreseen cable crossings for the proposed route. In the event an out of service cable is encountered during the pre-lay surveys it is proposed to utilise a combination of rock filter bags and concrete mattressing to cross the cable. It is proposed to install four concrete mattresses (10 tonne in weight) with dimensions of 3.0 m (breadth) x 6.0 m (length) laid adjacent to and directly over an out of service cable being crossed.

5.3.8. On either shore above the MLWS limit, where sufficient cable burial cannot be achieved, split pipe will be fitted around the cable for additional protection in the event of exposure (Figure 9). On both Shapinsay and Stronsay intertidal areas and down to the 10m water depth we will install split pipe protection to the cable. The split pipe is an articulated cast iron shell design that locks around the cable and fixed with bolted end clamps. There are a number of suppliers with differing shell designs and weights. As a guide, each shell has an 8 mm wall thickness, with an effective length of 391 mm and combined weight in air of 39.96 kg/m. The outer diameter of the split pipe is 213mm.

Figure 9 Split Pipe Diagram

Figure 9 – Diagram of split pipe protection 5.3.9. It is proposed to install the cable by using an open-cut trench method of installation inshore from the MLWS tidal limits at both shore end landfall locations. An open cut trench will be excavated to install and bury the cable. This will utilise traditional terrestrial-based plant including excavators at low tide. The typical underground cable trench is illustrated in Figure 10. The submarine cable will be connected to the terrestrial cable in a transition joint pit buried in the ground located above the

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MHWS limit at each end. The footprint of the trenching activities will be up to 10 m width centre on the replacement cable route. To allow for micro-routing during cable installation the landfall excavation works will take place within 100 m either side of the cable landfall positions shown.

Figure 6 Open Cut Cable Trench Cross Section Inshore of MLWS Limit

5.3.10. TheFigure excavated 8 - Open cut material cable trench will cross be secplacedtion inshore to one of MWSside limitof the trench for later reinstatement. Using a mechanical winch and cable rollers, the cable will be manoeuvred into the bottom of the trench

and then covered with the excavated material using the mechanical excavator. The trench width will be minimised where possible however will be dependent on ground stability but will typically be 1 m wide. The target depth of the trench will be 1.25 m. Temporary trench shoring may be required to prevent collapse of the trench wall. The footprint of the excavator may be up to 5 m, and a working width, including for the temporary storage of removed material, would be in the order of 10 m.

5.3.11. The submarine cable will be connected to the terrestrial cable in a transition joint pit buried in the ground located above the MHWS limit at each end. On completion of jointing, spoil material will be backfilled into the trenches and the shore will be reinstated; grassed areas will be left to re- seed naturally. The upper surface layer will be stripped and stockpiled separately to allow a quicker reinstatement.

5.3.12. The existing underground and overhead line cabling will be utilised to connect the new submarine cable into the existing electrical network on the islands.

5.3.13. At each shore landfall location, to facilitate the onshore works and ensure compliance with The Construction (Design and Management) Regulations 2015, a temporary site area will be required, approximately 25m x 25m in size, to provide welfare facilities and parking during the works. To minimise ground disturbance, ease reinstatement and recovery, the area will be covered with a membrane material and levelled with rock chippings.

5.3.14. Our proposed cable installation methodology is summarised in Figure 11 and Figure 12 and supported by the Cost Benefit Analysis modelling output. The final recommendation is 32% burial (aproxmately 4.7 km) and 68% surface laid (approximately 9.9 km).

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Figure 11 Table of Protection Location and Kilometre Installation type Length of cable Point (Kp) Kp 0 Shapinsay MHWS - Cast iron split pipe or 300m Kp 0.3 (10m water depth) mattresses Kp0.3 - Rock Bags 250m (6 rock bags) Kp0.55 Kp0.55 - Burial where possible, 2061m (Expect 1000m to be Kp2.611 between rocky / boulder buried) areas Kp2.611 - Rock Bags 1000m (21 rock bags) Kp3.611 (Across Baas of Linton) Kp3.611 - Burial where possible, 6352m (Expect 3000m to be Kp9.963 between rocky / boulder buried) areas Kp3.611 - Rock bag where stability 20 rock bags Kp9.963 concerns exist and burial cannot be achieved Kp9.963 - Rock Bags 1000m (21 rock bags) Kp10.963 (Across Dowie Sands) Kp10.963 - Burial where possible, 2137m (Expect 1000m to be Kp13.1 between rocky / boulder buried) areas Kp13.1 - Rock Bags 1300m (27 rock bags) Kp14.4 Kp14.4 - Cast iron split pipe or 700m Kp15.1 mattresses

Figure 12 Summary of Protection Method Protection method Length Weight Cable 16000m 576 tonnes Cast iron split pipe 1000m 60 tonnes Concrete mattresses 1000m 750 tonnes Rock bags 1,370m 95 rock bags 380 tonnes Burial (Attempted versus 10550m attempted N/A expected) versus 5000m expected

5.4. The proposed delivery programme

5.4.1. Within the Environmental Supporting Information, an identification of environmental receptors in the area, assessment of the potential impact from our cable replacements works and mitigation proposal has been carried out. SHEPD are aware that within the vicinity of works at Stronsay there is a designated protection site, namely the Greenli Ness seal haul-out designated for both harbour seal and grey seal.

5.4.2. However, we must also take cognisance of the critical nature to address the cable fault to ensure security of supplies to Orkney customers. For this cable, based on the proposed cable design methodology and timing constraints, it is proposed to install the submarine cable as early in June 2018 as possible with cable protection completed by end of July 2018. It is expected that the cable

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installation operations will run from 6 June to 30 June, but SHEPD are taking all possible steps to expedite this programme. 6. Unexploded ordinance strategy

6.1.1. The contractor appointed by SHEPD shall undertake an initial desktop study to assess the risk of UXO within the area of the cable route. In addition, if the desktop study identifies a high risk, a UXO survey along the cable route will be completed to detect any objects potentially UXO related. The results shall be used to inform cable routing within the consented corridor such that significant targets are avoided. If it is not possible to avoid a target, it shall be identified using an ROV or drop down camera. Alternatively, where a UXO is encountered that cannot be avoided, a specialist contractor shall be engaged to clear, recover or remove the target from the working area.

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Appendix A: Cable Corridor

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List of corridor co-ordinates:

ID Lat_wgs84 Long_wgs84 1 59.08294363 -2.646104737 2 59.08298013 -2.645994374 3 59.08295696 -2.645802134 4 59.08292823 -2.645648448 5 59.08296464 -2.645505088 6 59.08299207 -2.645185841 7 59.08292108 -2.645104083 8 59.08291328 -2.644323253 9 59.08286709 -2.643993769 10 59.08286075 -2.643746363 11 59.0828482 -2.643301045 12 59.08313284 -2.64284714 13 59.08313634 -2.642060688 14 59.08333938 -2.641783602 15 59.08343211 -2.641540659 16 59.08346795 -2.641193819 17 59.08343488 -2.640495733 18 59.08349104 -2.640330162 19 59.08346778 -2.640110427 20 59.08360726 -2.639372036 21 59.08362801 -2.638689881 22 59.08366659 -2.63831551 23 59.08359707 -2.637744295 24 59.08357873 -2.637260534 25 59.08347526 -2.636700681 26 59.08323024 -2.63613133 27 59.08291734 -2.635584705 28 59.08263902 -2.635257695 29 59.0822761 -2.635041575 30 59.08189096 -2.634979674 31 59.08153488 -2.635181424 32 59.08110034 -2.635669955 33 59.08075622 -2.636102526 34 59.08058135 -2.636324338 35 59.08050723 -2.636138156 36 59.08041047 -2.635952215 37 59.08027343 -2.635535746 38 59.0800971 -2.635240673 39 59.07998373 -2.635186887 40 59.07967732 -2.634937191 41 59.0793247 -2.634358062 42 59.07900675 -2.634031519 43 59.07864383 -2.633815434 44 59.07837197 -2.633774341 45 59.07812292 -2.633787991 46 59.07802121 -2.633855057 47 59.07765859 -2.633748948

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48 59.07674708 -2.633725667 49 59.07585298 -2.633856153 50 59.07504311 -2.633743818 51 59.07434093 -2.633674325 52 59.07395616 -2.6337444 53 59.07352073 -2.633913974 54 59.07296122 -2.634249797 55 59.07262796 -2.634517233 56 59.07236861 -2.634893832 57 59.07177569 -2.635427896 58 59.07141434 -2.635772574 59 59.07097318 -2.63592018 60 59.07065106 -2.636121497 61 59.07037434 -2.636366309 62 59.07017123 -2.63661034 63 59.06950538 -2.637386987 64 59.06914421 -2.637797586 65 59.06893032 -2.638239609 66 59.06837698 -2.638762152 67 59.06842848 -2.638959505 68 59.06812437 -2.639534386 69 59.06795628 -2.640162804 70 59.06760971 -2.641760538 71 59.0676105 -2.64204637 72 59.06733444 -2.642532969 73 59.06735185 -2.642686701 74 59.06695661 -2.643064591 75 59.0669514 -2.643229549 76 59.06652119 -2.643245005 77 59.06618195 -2.643402431 78 59.06591667 -2.643691007 79 59.06568553 -2.644045185 80 59.06574269 -2.644242472 81 59.06546069 -2.644630149 82 59.06520754 -2.645215398 83 59.06516845 -2.645413676 84 59.06492006 -2.645669076 85 59.0646607 -2.646056499 86 59.06445253 -2.646531333 87 59.06428986 -2.647082644 88 59.06422866 -2.647479011 89 59.06406679 -2.648327109 90 59.06401324 -2.649459905 91 59.06389638 -2.650208597 92 59.06372405 -2.651386558 93 59.06378117 -2.651572854 94 59.0635669 -2.651893808 95 59.06321155 -2.652381071 96 59.06291809 -2.652724799 97 59.06262006 -2.653475281

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98 59.06212458 -2.654491544 99 59.06180442 -2.65544007 100 59.0617249 -2.655341939 101 59.06154016 -2.656124215 102 59.06146349 -2.657103259 103 59.06147011 -2.657465925 104 59.06136821 -2.657466939 105 59.06139817 -2.658093177 106 59.06154672 -2.65860832 107 59.06163796 -2.65886023 108 59.0615663 -2.659597398 109 59.0615386 -2.659828502 110 59.06125575 -2.659908242 111 59.06105262 -2.66016306 112 59.06096288 -2.660482706 113 59.06059574 -2.660805085 114 59.06039784 -2.660894969 115 59.06027289 -2.660742319 116 59.05987713 -2.660944066 117 59.05957259 -2.661386719 118 59.05943198 -2.661739822 119 59.05931338 -2.661850899 120 59.05917206 -2.661929226 121 59.05890156 -2.6624045 122 59.05851106 -2.662452295 123 59.05818318 -2.662631365 124 59.0578227 -2.663338305 125 59.05760971 -2.664164687 126 59.05755478 -2.66481367 127 59.05769682 -2.665010119 128 59.05747231 -2.665759665 129 59.05735351 -2.665793791 130 59.05679819 -2.665590367 131 59.05658346 -2.665746318 132 59.05618662 -2.665530369 133 59.05588576 -2.665214581 134 59.0556311 -2.665250028 135 59.05509273 -2.665035468 136 59.05497408 -2.665124542 137 59.05468989 -2.664687719 138 59.05462773 -2.664732283 139 59.05425823 -2.664142446 140 59.0536909 -2.663675439 141 59.0535094 -2.66354534 142 59.05316188 -2.662702568 143 59.05282099 -2.662233377 144 59.05249765 -2.661983803 145 59.05220902 -2.662019604 146 59.05181898 -2.66224321 147 59.05072866 -2.663121997

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148 59.05045246 -2.663586212 149 59.05021623 -2.664181888 150 59.04981346 -2.666053804 151 59.04961804 -2.667110557 152 59.04918481 -2.668158602 153 59.04894927 -2.669028915 154 59.04882752 -2.67012887 155 59.04850172 -2.671131876 156 59.0482152 -2.672002637 157 59.0480699 -2.672751178 158 59.04807123 -2.67327857 159 59.04806149 -2.673904955 160 59.04780213 -2.674324937 161 59.04752625 -2.674931855 162 59.04759474 -2.675150958 163 59.04713341 -2.676308977 164 59.04702736 -2.676914273 165 59.04683614 -2.677421479 166 59.04642469 -2.678150481 167 59.04622857 -2.678965353 168 59.04607288 -2.680109448 169 59.04590044 -2.68135257 170 59.04558437 -2.681740034 171 59.04533604 -2.682049957 172 59.04519014 -2.682578665 173 59.04508974 -2.683194842 174 59.04504051 -2.683898439 175 59.04509261 -2.684370386 176 59.04514418 -2.684622607 177 59.04486168 -2.684855912 178 59.04455681 -2.685199284 179 59.04437694 -2.685728276 180 59.04429311 -2.686179483 181 59.04436719 -2.686376563 182 59.04427166 -2.686674065 183 59.04419307 -2.686949439 184 59.04426717 -2.687157507 185 59.04414382 -2.687653013 186 59.04385039 -2.688051179 187 59.04369831 -2.688371157 188 59.04368768 -2.688656894 189 59.04332658 -2.689165519 190 59.04316886 -2.689496524 191 59.04297809 -2.690212331 192 59.0428492 -2.690762787 193 59.04276582 -2.691411704 194 59.04235507 -2.692470018 195 59.04220919 -2.693020607 196 59.04219319 -2.693438207 197 59.04213196 -2.693878179

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Project Description

198 59.04204257 -2.694384314 199 59.04209983 -2.694658448 200 59.04174476 -2.695331717 201 59.04141817 -2.696081618 202 59.04117616 -2.69668795 203 59.04112029 -2.697007018 204 59.04090176 -2.697975647 205 59.0407962 -2.698833423 206 59.04067922 -2.699658338 207 59.04068669 -2.700438224 208 59.04082461 -2.70132683 209 59.04103091 -2.702412589 210 59.04120162 -2.702795602 211 59.04121961 -2.703234863 212 59.04120975 -2.7038721 213 59.04133071 -2.70478285 214 59.04149785 -2.70608869 215 59.04156772 -2.706944962 216 59.04166595 -2.707822969 217 59.04173465 -2.708162938 218 59.04174167 -2.708767085 219 59.04172065 -2.709492309 220 59.04171073 -2.710118569 221 59.04186622 -2.711303704 222 59.04196425 -2.712104833 223 59.04201034 -2.712466974 224 59.04206858 -2.713202526 225 59.04222284 -2.713838413 226 59.04219647 -2.714717488 227 59.04209686 -2.715761951 228 59.04186567 -2.716181313 229 59.04167449 -2.716776107 230 59.04156882 -2.717644831 231 59.0416272 -2.71845728 232 59.04174863 -2.719631742 233 59.04180136 -2.72045523 234 59.0418818 -2.721003857 235 59.04179863 -2.721817463 236 59.04181108 -2.72234467 237 59.04179483 -2.722685354 238 59.04172894 -2.723641627 239 59.04176398 -2.724146682 240 59.04170446 -2.725443452 241 59.04163291 -2.726410748 242 59.04164021 -2.727190662 243 59.04176133 -2.728255301 244 59.04188838 -2.729451728 245 59.04204454 -2.731043419 246 59.04205737 -2.731768372 247 59.04214888 -2.732218072

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Project Description

248 59.04221221 -2.732733907 249 59.0421741 -2.733470244 250 59.04213093 -2.734503231 251 59.04224069 -2.735578984 252 59.04235555 -2.736380061 253 59.04236823 -2.737050094 254 59.04231404 -2.738247952 255 59.04226462 -2.739006342 256 59.04230694 -2.74034628 257 59.04238802 -2.741257485 258 59.04236205 -2.742433155 259 59.04237479 -2.743147133 260 59.04247823 -2.743926352 261 59.04254939 -2.745562706 262 59.04259007 -2.746100711 263 59.04279733 -2.747867909 264 59.04306719 -2.749821434 265 59.04309321 -2.751579 266 59.04314655 -2.752831018 267 59.0431664 -2.754335956 268 59.04307136 -2.75497382 269 59.0428854 -2.755425566 270 59.04286358 -2.755865157 271 59.04282571 -2.756799225 272 59.04286636 -2.757348233 273 59.04300393 -2.758259096 274 59.04298789 -2.758764562 275 59.04306864 -2.759565971 276 59.04309248 -2.760213977 277 59.0430884 -2.761070911 278 59.04318672 -2.762201786 279 59.04323586 -2.764310761 280 59.04328978 -2.76594731 281 59.04337006 -2.766518039 282 59.04333152 -2.767122532 283 59.04339494 -2.767759295 284 59.04348119 -2.768505767 285 59.04350564 -2.769516324 286 59.04355204 -2.770142221 287 59.04362686 -2.770833848 288 59.0435363 -2.770845437 289 59.04358275 -2.771504295 290 59.0437196 -2.772063681 291 59.0439887 -2.77378674 292 59.04386977 -2.773765549 293 59.04397837 -2.774358093 294 59.04405378 -2.775401294 295 59.0441166 -2.775719487 296 59.04416238 -2.776004832 297 59.04404452 -2.776598858

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Project Description

298 59.04390377 -2.777050206 299 59.04389377 -2.777819306 300 59.04401852 -2.77793935 301 59.04413302 -2.778685679 302 59.04416809 -2.779333645 303 59.04409014 -2.780103185 304 59.04413048 -2.780520406 305 59.0442896 -2.780881941 306 59.0443304 -2.781573822 307 59.04437683 -2.782254682 308 59.04433884 -2.783232708 309 59.04438479 -2.783627928 310 59.04450399 -2.783813948 311 59.04426138 -2.784309856 312 59.04410952 -2.784904067 313 59.0440374 -2.785794404 314 59.04411756 -2.78634322 315 59.04426026 -2.787056446 316 59.04426666 -2.787506846 317 59.04437485 -2.787890701 318 59.04435352 -2.788692836 319 59.04436084 -2.789714523 320 59.04445272 -2.790515968 321 59.04457186 -2.79068004 322 59.04471003 -2.792107441 323 59.04480089 -2.792282677 324 59.04480738 -2.792799003 325 59.04471785 -2.79345873 326 59.04474705 -2.794018866 327 59.04481535 -2.794249174 328 59.04492388 -2.794863771 329 59.04481155 -2.795424752 330 59.0447674 -2.796150123 331 59.04484798 -2.796995607 332 59.04504149 -2.797653661 333 59.04499725 -2.798324101 334 59.04479426 -2.798852642 335 59.04476681 -2.799402127 336 59.04481949 -2.800522444 337 59.04484325 -2.801247416 338 59.04488318 -2.801444943 339 59.04490654 -2.801917229 340 59.04485239 -2.803532558 341 59.04478605 -2.80458764 342 59.04471424 -2.805774586 343 59.04479062 -2.807641859 344 59.04465649 -2.808818158 345 59.04463544 -2.809905933 346 59.04474485 -2.811168774 347 59.04493886 -2.812222418

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Project Description

348 59.04459425 -2.812718686 349 59.04487852 -2.813563102 350 59.04489008 -2.813727837 351 59.04518577 -2.814638127 352 59.04551538 -2.815526276 353 59.04587991 -2.817084454 354 59.04602778 -2.817567091 355 59.04610868 -2.818742262 356 59.04609832 -2.819434492 357 59.0462011 -2.820060208 358 59.04632645 -2.820641863 359 59.04647972 -2.820948701 360 59.0463785 -2.821443642 361 59.04636197 -2.821773338 362 59.04645294 -2.822058529 363 59.04667365 -2.822002453 364 59.04699605 -2.821792029 365 59.04726724 -2.821395083 366 59.04735718 -2.82093315 367 59.04742422 -2.820284548 368 59.04762141 -2.819602301 369 59.04775621 -2.818832474 370 59.04802694 -2.81811686 371 59.04812298 -2.817973514 372 59.04812226 -2.817457103 373 59.04809761 -2.81603984 374 59.04798335 -2.815315275 375 59.04778877 -2.813844001 376 59.04768685 -2.813833565 377 59.04762918 -2.813097721 378 59.04766714 -2.811943837 379 59.04764357 -2.811306697 380 59.04749584 -2.810933936 381 59.0475626 -2.810131491 382 59.04740977 -2.810143321 383 59.04727843 -2.809374936 384 59.04741322 -2.808638038 385 59.04747445 -2.807934508 386 59.04745587 -2.806857852 387 59.04737581 -2.806319922 388 59.04713664 -2.805387352 389 59.04717475 -2.804376309 390 59.04723559 -2.803431058 391 59.04717212 -2.802640338 392 59.04718188 -2.801618467 393 59.04720847 -2.800497613 394 59.04714443 -2.79935531 395 59.04717424 -2.796685233 396 59.04705539 -2.79670791 397 59.04690599 -2.795302434

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Project Description

398 59.04681194 -2.793116552 399 59.0468157 -2.791929918 400 59.0466228 -2.788173501 401 59.04652747 -2.785284493 402 59.04639007 -2.784362441 403 59.04648433 -2.78317525 404 59.04650029 -2.782559875 405 59.04641966 -2.781747345 406 59.04641202 -2.780571782 407 59.04638872 -2.780187385 408 59.04630891 -2.779858285 409 59.04637664 -2.779736995 410 59.04619976 -2.778925092 411 59.04602906 -2.778420791 412 59.04599995 -2.777948542 413 59.04610183 -2.777936898 414 59.04609511 -2.777321674 415 59.04605418 -2.776563842 416 59.04624526 -2.775749567 417 59.04619875 -2.775046705 418 59.0461412 -2.774508721 419 59.0460613 -2.774135689 420 59.04621388 -2.773980871 421 59.04603681 -2.773081107 422 59.04588334 -2.77273054 423 59.04588234 -2.77215923 424 59.04598318 -2.771554284 425 59.0460218 -2.770982709 426 59.04599254 -2.770444546 427 59.04587862 -2.770049779 428 59.04588354 -2.769632246 429 59.04582673 -2.769522757 430 59.04587678 -2.769017027 431 59.0459884 -2.768115353 432 59.04590735 -2.767116095 433 59.04575886 -2.76639197 434 59.04597265 -2.765654398 435 59.04601041 -2.764621372 436 59.04592391 -2.763754001 437 59.04571905 -2.763173106 438 59.04549792 -2.762987853 439 59.0454174 -2.762296245 440 59.04555794 -2.761756923 441 59.04558514 -2.761152463 442 59.0454541 -2.760702917 443 59.04560575 -2.760053643 444 59.04565532 -2.759306196 445 59.04543842 -2.758351869 446 59.04562421 -2.757801226 447 59.04570806 -2.757229322

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Project Description

448 59.04566178 -2.756702283 449 59.04551868 -2.755868301

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Project Description

Appendix B: Proposed cable installation programme

Activity Date

Start of shore works 6 June 2018

Start of marine works 15 June 2018

Completion of submarine cable lay 30 June 2018

Completion of shore works 30 June 2018

Completion of post lay protection 31 July 2018

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