Cowstead. Land off Road, , Point of Contact Site (Impact Statement)

Cowstead Land off Queenborough Road Sheerness, Kent

Point of Connection Site – Impact Statement

1 INTRODUCTION

1.1 Project background 1.1.1 Wessex Archaeology was commissioned by Sembcorp Energy UK to undertake archaeological works associated with a new substation and associated infrastructure on land off Queenborough Road, Sheerness, Kent, centred on NGR 592615, 171404. Appendix 1 shows the site in its entirety.

1.1.2 The site has been divided into three areas. Below is a brief summary of each area to assist with the description;

1. The Main Site. Located east of Neats Court Cottages and comprises the construction of an electricity battery storage facility within a steel framed portal building. The site will also include a transformer facility, access and infrastructure as well as hard standing and landscaping.

2. Cabling runs to the west from the main site. Located south of Neat’s Court Farm and enters the Point of Connection Site.

3. Point of Connection Site (PoC). The 132kV electricity cables will terminate in a compound at the PoC via electrical switchgear. The switchgear will connect to an existing electricity pylon.

Archaeological works have been agreed for the Main Site and the Cabling route which will connect to the Main Site to the Point of Connection Site (outlined below).

Previous Archaeological Works across the Project 1.1.3 A summary of the archaeological and historical background is presented in a specification prepared by Kent County Council for the main site (KCC 2019). This states that:

The site lies on the close to the discovery of the remains of prehistoric, Roman and medieval date on the nearby Neatscourt Phase 1 development and on the remodelled A249 road. Of particular relevance are the finding of Iron Age and Roman cremation burials scattered in the area close to the south and east of the site. Iron Age and other Roman features also lie in proximity. The site is located on the margins of the land emerging from the Sheppey marshes which would have been attractive to ancient peoples for their resources.

1.1.4 A number of archaeological investigations have been undertaken upon a site to the immediate south of the section of the A249 which forms the site boundary (WA 2015). Results from of this included:

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Cowstead. Land off Queenborough Road, Sheerness, Kent Point of Contact Site (Impact Statement)

- Test pits revealed significant amounts of early prehistoric remains and indications of the potential location of a Bronze Age settlement associated with a buried land surface underlying alluvial deposits;

- A funerary mound presumed to date to the Early Bronze Age which contained 14 cremation and inhumation burials;

- Further early Bronze Age evidence in the form of a large pit and adjacent post holes as well as a circular enclosure;

- A middle/late Bronze Age clay extraction quarry;

- Possible quarry or salt production pits and natural water channels that suggested a continuation of land use from the prehistoric to early Romano- British period;

- Burials from the late prehistoric to Romano-British period, including urned Romano-British cremations burials, possibly part of a large cemetery group;

- Romano-British ditches and pits;

- An early medieval field system;

- Medieval features including a 12-13th century pit, a ditch and a cattle burial; and

- Numerous undated features.

1.1.5 An archaeological evaluation of the Main Site comprising nine evaluation trenches has been carried out by Wessex Archaeology. No archaeological features were uncovered during the evaluation. As previous archaeological investigations directly south of the site had identified evidence of Bronze Age activity, including a funerary mound which contained fourteen cremation graves and inhumation burials (WA 2019), an archaeological watching brief was undertaken during works on this site and on the cable works to the west. This work is ongoing at the time of preparation of this document and to date no finds or features of archaeological significance have been uncovered.

1.1.6 Archaeological monitoring of the cabling route is on-going and to date and no archaeological finds have been identified during these works.

2 POINT OF CONNECTION SITE - CONSTRUCTION IMPACT

2.1.1 The PoC lies to the north west of the main site and comprises a roughly rectangular area (Appendix 2).

2.1.2 The works on the PoC site (Appendix 2) comprises the construction of electrical switchgear and a control room as well as an access road and compound for the site.

2.1.3 As a first stage the site was reduced by approximately 0.5m and covered in crush to make a level construction area (Plate 1).

2.1.4 Groundworks for the transformers comprised the excavation of foundation trenches and pilling to a depth of 7-12 meters.

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Cowstead. Land off Queenborough Road, Sheerness, Kent Point of Contact Site (Impact Statement)

2.1.5 An access road has also been constructed. This was excavated to a depth of 350mm and covered with terram and then backfilled to ground level with type 1 (Appendix 3).

2.2 Archaeological Monitoring 2.2.1 An archaeologist monitored the excavation of trenches and cabling in the south west and south east of the PoC site.

2.2.2 The stratigraphy of the PoC site comprised a layer of crush and gravel with angular and sub angular fragments of stone 0.4m thick, representing the recent construction area. The second layer comprised a layer of redeposited natural, 0.2m thick and brownish black in colour. The third layer comprised a layer of made ground with a black hue 0.75m thick. Natural deposits were intermittently identified at the base of the cable trenches and foundations (Plate 2).

2.2.3 No archaeological finds or features were recorded during the watching brief, and no evidence relating to the previously identified cremation deposits nearby were identified.

2.3 Impact Assessment 2.3.1 The main area of the (PoC) site was covered in a deposit of made ground, up to 0.90m thick which to a large extent protected potential archaeological remains.

2.3.2 The construction of the compound it unlikely to have extended below made ground and therefore will not have impacted on natural deposits which may contain archaeological remains.

2.3.3 The excavation of the foundations is likely to have extended below the made ground and have had limited impact on natural deposits. It is possible that this would have had some impact on potential archaeological remains, but no such remains identified in the archaeological monitoring.

2.3.4 The pilling penetrated to between 9 and 12 meters and would have had significant vertical impact although the horizontal impact would have been minimal.

2.3.5 There is little information as to the nature of the deposits in the area of the access road. Based on our understanding of the depth of the archaeological remains in the nearby areas, the 350mm excavation for the construction was not likely to have extended deeply into the natural deposits. Also, the layering of terram will provide some measure of protection of the deposits through continued use.

2.4 Further Work and Recommendations 2.4.1 There is limited further construction work proposed for the PoC site. The temporary bridge will be replaced by a more permanent structure. It is proposed that below ground works related to this is monitored by an archaeologist.

2.4.2 Further work on the access road will comprise 100m of re-stripping of the surface and layering of a more permanent surface material. This will be within previously disturbed ground, therefore no further work is suggested.

2.4.3 The results of the monitoring undertaken on the PoC will be incorporated in a report which will detail the results of the monitoring across the whole project.

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Cowstead. Land off Queenborough Road, Sheerness, Kent Point of Contact Site (Impact Statement)

BIBLIOGRAPHY

Wessex Archaeology 2019. Land Adjacent to 9 Neatscourt Cottages, Queenborough, Isle of Sheppey: Archaeological Evaluation Report. Unpub rep 222230.03

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Cowstead. Land off Queenborough Road, Sheerness, Kent Point of Contact Site (Impact Statement)

Plates

Plate 1: Excavating foundations through gravel layer used to provide level construction compound.

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Cowstead. Land off Queenborough Road, Sheerness, Kent Point of Contact Site (Impact Statement)

Plate 2: Cable trench showing made ground (note ceramic in trench section)

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A B C D E F G H J K L M N25m P Q R Drain

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O-H E E E POINT No: O-H

E E: 592414.408

E E E E OHE E E N: 171366.982 Approx. 15m of 132kV Cable

E E

E E E E Fibre Optic Pit x2 E E

E E OHE

O-H E O-H

E POINT No: E E E

E E E: 592439.001 shall be coiled at this Location

E N: 171359.687

E E E E EE E EE POINT No: OHE EE E E E E: 592463.034 O-H E E N: 171354.521 O-H E for Cable Termination E E E E E E OHE E POINT No: E E E E E E E: 592487.317 E E E N: 171348.791 E POINT No: E E O-H OHE E E O-H

E E: 592548.963 E E SS

Depot E BIG POINT No: N: 171335.250 125A

E SS

2

E K E COS E E E E: 592511.479 IDNO Control Room PIR 125A

2 K

E COS E N: 171342.467 SS Room Meter Client Control Room PIR OHE 1568 mm

E PIR 2

K E

1568 mm 1000 mm E SS E POINT No: Client Switchroom

1568 mm E E POINT No: E: 592549.183 BIG E 1568 mm E E E E: 592533.435 N: 171335.224 1568 mm E E 1568 mm E E E N: 171338.288 E E E E POINT No: E E E: 592595.390 E

E POINT No: POINT No: POINT No: N: 171334.856 E E: N: 592592.396 E E E: 592561.050 E: 592572.509 171335.807 E E E N: 171333.925 N: 171335.556 E

E Post & Wire Fence E E E E E

E E E E E

E E E E E E POINT No: E E: 592567.742 1N E E N: 171333.180 POINT No: 1U E: 592577.338 E

E 2U 2V Approximate Cable Length N: 171331.788 1V E E POINT No: 2W E E: 592584.728 1W E E E E E N: 171333.124 E E

E E E E Olney Office Park, 1 Osier Way Olney, Buckinghamshire MK46 5FP United Kingdom Between JB-01 & IDNO E E E E

E E E E Fibre Optic Pit x2 E E

E E E E E E E Termination = 392m E E E E E E E A2500 E E E E E Telephone: 01234 482 482 Faxsimile: 01234 241 312 E E E E E 10 E E E Web: www.g2energy.co.uk e-mail: [email protected] 10 A249 Drain Project Number: P2468

Project Title: Cowstead Battery Project

Client(s): UKPR

Project Issue Date: October 2018

Drawn By: SH Checked By: SF Approved By: EG 11 Cable Route Plan Rev: 11 1 Drawing Number: Scale : 1:2000 @ A1 1:4000 @ A3 P2468-32-01 N

Drawing Name: Overall Cable Route

Sheet Print Stamp: 11.03.2020

Scale: 1:2000 @ Paper Size: A1 Drawing Status: 12 FOR APPROVAL 12 A B C D E F G H J K L M N P Q R A B C D E F G H J K L M N P Q R LEGEND 1 Package 1 Substation PROPOSED SITE 20.0

Construction UKPN Control Room Compound UKPN Structures Existing D30 Tower 2 2

B2007 PIR

E 3.0 kW

2 5

4

9

3 Cable CT & Gantry Post Surge

3.0 kW 6 A A 2 Sealing CVT Unit & Insulator Arrester 20A

20A

1 8 16.0 End Disconnector

A 7 2 BT

11 A 20A 9

13 Consumer Unit K 2 2 12 E E

PIR PIR GS

Generato r socket leaf Active 533x82 UB

3x 132kV HV Cable 19.2 A 3 Access Bridge 533x82 UB 3 A Meter 27.5 Cabinet

Palisade Fencing 4 4 Amb Sta Screening Hedge

5 5

See Drawing 2 for typical section across Existing D30 Tower Access Road Road and Site

6 6

7 E 01.06.2020 Access Road Ammended SF 7 D 09.03.2020 Scale Bar Ammended SF EG EG C 13.02.2020 Hedgerow ammended SF EG EG B 07.02.2020 Revised Site Plan As Per Client's Comment ZA SF EG A 16.01.2019 Construction Compund Ammended SF EG EG O 12.12.2019 Original SH SF EG Revision Rev Date: Revision Description: Drn Ckd Appd Revisions Schedule Do not scale from this drawing All reasonable care and diligence has been taken in the accuracy & content of 8 this drawing. g2 Energy advises that care is taken if you should scale items from this 8 drawing. g2 Energy should be consulted prior to the re-use of this drawing.

No part of this drawing may be reproduced , transcribed, stored in a retrieval system or transmitted in any form or by any means either electronic, mechanical, photocopying, recording or otherwise without the prior written permission of the copyright owner. Site Plan © 2020 Copyright of g2 Energy Limited. All Rights Reserved. 1 Scale : 1:500 @ A3 Tanalised softwood timber edging min. section 25mm x 75mm For width see layout drawings pegged at 1.0m intervals with Tanalised hardwood pegs, min. size 50mm x 50mm x 450mm. All timber to clause 304.1. Use SURFACE FINISH LEGEND 50mm long galvanised nails to fix edging to pegs. 9 Queenborough 9

Town Council Limestone Chipping

Olney Office Park, 1 Osier Way Olney, Buckinghamshire MK46 5FP United Kingdom

Telephone: 01234 482 482 Faxsimile: 01234 241 312 10 Type 1 Recycled Aggregate Web: www.g2energy.co.uk e-mail: [email protected] 10 Project Number: P2468

75mm Cellpave HD Cellular Units Project Title: Cowstead Battery Storage

Soil Infill With Grass Seed And Fertiliser. (Grass Seed Mix for Low Growth, Low Maintenance) Client(s): UKPR 20mm Clean Course Sand Bedding Access road Project Issue Date: October 2018

250m Thick 6F5 Recycled Aggregate Drawn By: SH Checked By: SF Approved By: EG 11 Rev: 11 Drawing Number: P2468-175-02 E Terram 1000 Geotextile or Similar Approved Drawing Name: * Subgrade to be proof rolled prior to construction and any UKPN POC Location Plan soft spots excavated and backfilled with additional type 3 Sheet Print Stamp: granular material. 1:500 Scale:As Shown @ Paper Size: A3 10m 0 10m 20m 30m 40m 50m Drawing Status: 12 SECTION A-A TYPICAL SECTIONS ACROSS SITE 12 2 Scale: 1:20 FOR PLANNING A B C D E F G H J K L M N P Q R