appendix a - National Grid

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5 SITE DESCRIPTION 5.1 Site Location and Description TEP on behalf of National Grid 6 of 21 King’s Lynn 400kV Connection 110488-FRA-R1(1) For the purposes of this FRA, “The Site” is defined as the 3.5km linear connecting route, including all temporary access roads and compounds associated with the working area. The proposed new overhead line will comprise 9 new pylons, including one replacement pylon on an existing overhead line. The site is located approximately 3km south of King’s Lynn town centre. The Puny drain is located beyond the eastern site boundary of the site with the village of West Winch located further to the east. The Great Ouse Relief/Cut Off Channel is located to the west of the site with the Great Ouse River located further west. The surrounding area is predominantly flat with much of the land comprising large-scale arable farmland. Built development in the area surrounding the site generally comprises small villages, individual properties and farms. With the exception of King’s Lynn, the most significant area of development is West Winch. The Dairy Farm, which is located in the centre of the site may be located by National Grid Reference at TF 613155. A site location plan is presented as Figure 1. 5.2 Hydrology 5.2.1 Area Hydrology The site area and surrounding area is characterised by low-lying farmland, which is drained by a series of controlled waterways. The majority of the watercourses and drains in the area are managed and maintained by the East of Ouse, Polver & Nar Internal Drainage Board (IDB) and flow in a south to north direction. The drainage network eventually discharge into The Wash via the Great Ouse River, which lies approximately 7km to the north of King’s Lynn and is a nature conservation site of international importance. 5.2.2 Site Hydrology The principal watercourse is River Nar, which flows south to north, with the site area crossing the Nar twice. The site and the area immediately surrounding the site is crossed by several smaller drainage ditches, with named drains such as The Puny Drain (fluvial) located approximately 500m to the east of the site, the North Sea Bank drain flows adjacent to the High Road to the north of the site and the Thiefgate drain is located between the River Nar and the Thiefgate Lane to the south of the site. These drainage features are all managed and maintained by the IDB. The Great Ouse Relief Channel is located approximately 500m to the west of the site with the River Great Ouse (tidal), 1km -1.5km further west. The River Nar, The Great Ouse Relief Channel and the River Great Ouse are all classified as Main Rivers.
5.3 Geology TEP on behalf of National Grid 7 of 21 King’s Lynn 400kV Connection 110488-FRA-R1(1) According to the published 1:50,000-scale geological map of the area, superficial geology of the site is underlain by tidal flat deposits with clay and silt. The bedrock geology of the site is characterised by the Kimmeridge Clay formation. 5.4 Hydrogeology As shown on the EA map (Figure 2), the nearest aquifer is approximately 1km to the east of the site in West Winch where the superficial deposits is made up of ‘Secondary (Undifferentiated)’ and the bedrock aquifer as ‘Principal’. ‘Secondary (Undifferentiated)’ aquifers indicate that the layer has previously been designated as both minor and nonaquifer due to variable characteristics of the rock type. ‘Principal’ aquifers are major aquifers with high permeability. The site itself is located on a non-aquifer, however, depending on the exact make up of the superficial geology (tidal flat deposits) some perched shallow groundwater may be present.
Page 1 and 2: 3.0 King’s Lynn B Power Station C
Page 3 and 4: CONTENTS 1 EXECUTIVE SUMMARY.......
Page 5 and 6: 1 EXECUTIVE SUMMARY TEP on behalf o
Page 7 and 8: 3 CONTEXT AND SCOPE OF WORK TEP on
Page 9: 4.3 Sequential Test Analysis TEP on
Page 13 and 14: 7 SOURCES OF INFORMATION 7.1 Enviro
Page 15 and 16: TEP on behalf of National Grid 11 o
Page 17 and 18: 8.3 Flooding from Land (Overland Fl
Page 19 and 20: 9 POTENTIAL IMPACTS TEP on behalf o
Page 21 and 22: 9.2.4 Crossing TEP on behalf of Nat
Page 23 and 24: 10.5 Flood Plan TEP on behalf of Na
Page 25 and 26: 12 REFERENCES 1. Communities and Lo
Page 27 and 28: Relief Channel River Great Ouse Thi
Page 29 and 30: !H M etres 0 100 200 400 Key This m
Page 31 and 32: ( "This document has been prepared
Page 33: G/! ! + + ; + 5G; G6 ! * 5 ! G* G6
Page 36 and 37: TEP on behalf of National Grid King
Page 38 and 39: ANNEX E: THE ASSESSMENT OF FLOOD RI
Page 40 and 41: • A cross-section of the site sho
Page 42 and 43: APPENDIX C PPS 25 Annex D.1: Flood
Page 44 and 45: TEP on behalf of National Grid King
Page 46 and 47: APPENDIX D Environment Agency Corre
Page 48 and 49: Kings Lynn B Connection Project - Y
Page 50 and 51: Kings Lynn B Connection Project - Y
Page 52 and 53: If you would like to discuss the ab
Page 54 and 55: Dear K. Cheng Our ref: CCN/2011/299
Page 56 and 57: Environment Agency Flood Zone Map c
Page 58 and 59: 2.0 Defence Information River Great
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Standard Notice [not for use with S
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Ka Yan Cheng From: Gerald Allison [
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APPENDIX F Borough Council of King
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would like to know if the council h
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Ordnance Survey Mapping © Crown Co
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APPENDIX H Details of Tower Types T
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