Water Resources and Flood Risk

Dudgeon and Sheringham Shoal Offshore Wind Farm Extensions Preliminary Environmental Information Report

Volume 2 Chapter 20 - Water Resources and Flood Risk

April 2021

Doc. No. PB8164-RHD-ZZ-XX-RP-Z-0010 Rev. no.1

Title: List of Figures Dudgeon and Sheringham Shoal Offshore Wind Farm Extensions Figure 20.1 Water Resources and Flood Risk Study Area Preliminary Environmental Information Report Figure 20.2 WFD Groundwater Bodies Chapter 20 Water Resources and Flood Risk Figure 20.3 Water Body Receptors Document no.: Figure 20.4 Groundwater Receptors PB8164-RHD-ZZ-XX-RP-Z-0010 Figure 20.5 Crossing Schedule

Date: Classification 29 April 2021 Final

Prepared by:

Royal HaskoningDHV

Approved by: Date: Johiris Rodriguez Tablante, Equinor 29 April 2021

Page 2 of 2

Classification: Open Status: Final www.equinor.com 590000 600000 610000 620000 630000 640000

Sheringham Shoal and Not part of a river Not part of a river WB catchment WB catchment 222 Dudgeon Extension Projects 40 Not part of a Figure 20.1 river WB catchment Not part of a Water Resources and Flood Risk 40 river WB catchment Study Area Not part of a 387 river WB catchment Glaven Legend: 298 GB105034055780 PEIR Boundary

340000 Mun Binham Tributary GB105034055900 GB105034055830 Onshore Substation Site WFD River Water Bodies WFD Surface Water Operational Catchment

Scarrow Beck Bure Stiffkey GB105034055740 North Norfolk Burn GB105034055840 Legend: GB105034055750 Wensum

Gunthorpe Stream Not part of a Yare GB105034055770 river WB catchment 386 WFD River Waterbody Catchment North Walsham and Dilham Canal (disused) Screened in GB105034055710 Screened out

East Ruston Stream King's Beck GB105034055670 GB105034055730 330000 Little Ryburgh Bure (u/s confluence Tributary with Scarrow Beck) GB105034055860 GB105034055690 Bure (Scarrow Beck New Cut to Horstead Mill) GB105034050940 GB105034050932

Foulsham Tributary GB105034055850 Mermaid Stream GB105034050900 Wensum US Blackwater Norwich Drain (Wensum) Smallburgh Watercourse GB105034050890 GB105034055881 GB105034051120 Wensum (to Tatterford) Data Sources: Environment Agency, 2020; © Royal HaskoningDHV GB105034051111 Hevingham 2021. Watercourse Ant (Dilham Base Map: © Crown copyright and database rights 2020, Ordnance GB105034050870 to R. Bure) Survey 0100031673; © OpenStreetMap (and) contributors, CC-BY-SA Blackwater GB105034051330 Contains OS data © Crown Copyright and database right 2020 (Wendling Beck) Thurne GB105034051050 Swannington Beck GB105034051360

320000 GB105034051070

Nar upstream Spixworth ( and of Abbey Farm Dobbs) Beck GB105033047791 GB105034050970

Bure (Horstead Mill to St Benet's Abbey) Wendling Beck GB105034050931 GB105034051020

Muck Fleet GB105034050860 Document No: PB8164-RHD-ZZ-ON-DR-Z-0079 Tud Co-ordinate System: British National Grid Witton Run GB105034051000 0 5 10 km Wensum DS GB105034051310 Norwich GB105034055882 0 3 6 Miles 310000 Yare (u/s confluence Not part of a with Tiffey - Lower) river WB Wissey - Upper Yare (u/s confluence GB105034051290 catchment GB105033047890 with Tiffey - Upper) Yare (Tiffey 13 GB105034051270 to Wensum) A 16/03/2021 1:175,000 A3 AZ KT MW

GB105034051281 REV DATE SCALE SIZE DRW CHK APR Tiffey GB105034051282 Intwood Stream Report: GB105034051240 Hellington Blackwater (Yare) Beck Water Resources and Flood Risk GB105034051260 GB105034051210 Preliminary Environmental Information Report (PEIR) Watton Brook Hackford Yare (Wensum GB105033047870 Watercourse to tidal) GB105034051200 Chet GB105034051370 GB105034051190 Tiffey (u/s Not part of a Wymondham STW) Tributary of Tas Stow Bedon Stream Tas river WB GB105034051180 GB105034050950 GB105033047860 (Tasburgh to R. Yare) catchment Thompson Stream Thet (US Swangey Fen) 300000 14 GB105033047840 GB105033047830 GB105034051230 590000 600000 610000 620000 630000 640000

Sheringham Shoal and Dudgeon Extension Projects Figure 20.2 WFD Groundwater Bodies

Legend: PEIR Boundary 340000 North Norfolk Onshore Substation Site Chalk WFD Groundwater Body GB40501G400100 Broadland Rivers Chalk & Crag Cam and Ely Ouse Chalk Legend: North Norfolk Chalk North West Norfolk Chalk 330000

Data Sources: Environment Agency, 2020; © Royal HaskoningDHV 2021. Base Map: © Crown copyright and database rights 2020, Ordnance Survey 0100031673; © OpenStreetMap (and) contributors, CC-BY-SA Contains OS data © Crown Copyright and database right 2020 Broadland Rivers Chalk & Crag 320000 GB40501G400300

North West Norfolk Chalk GB40501G400200 Document No: PB8164-RHD-ZZ-ON-DR-Z-0080 Co-ordinate System: British National Grid 0 5 10 km

0 3 6 Miles 310000

A 16/03/2021 1:175,000 A3 AZ KT MW

REV DATE SCALE SIZE DRW CHK APR Cam and Ely Ouse Chalk Report: GB40501G400500 Water Resources and Flood Risk Preliminary Environmental Information Report (PEIR) 300000 608000 610000 612000 614000 616000

Sheringham Shoal and Dudgeon Extension Projects Figure 20.3

344000 Water Body Receptors Sheet 1 of 6 New Catchwater Cut Spring Legend: Drain Beck PEIR Boundary WFD River Water Bodies Main River IDB Drain Watercourse Legend: WFD River Water Body Catchments Bure (u/s confluence with Scarrow Beck) Glaven Scarrow Beck Not part of a river WB catchment 342000

340000 Data Sources: Environment Agency, 2020; © Royal HaskoningDHV 2021 Scarrow Base Map: © Crown copyright and database rights 2020, Ordnance Beck Survey 0100031673; © OpenStreetMap (and) contributors, CC-BY-SA

338000 Document No: PB8164-RHD-ZZ-ON-DR-Z-0081 River Co-ordinate System: British National Grid Glaven 0 1 2 km

0 0.5 1 Miles

A 16/03/2021 1:35,000 A3 AZ KT MW

REV DATE SCALE SIZE DRW CHK APR

Report: Water Resources and Flood Risk Preliminary Environmental Information Report (PEIR) 336000 608000 610000 612000 614000 616000 618000

Sheringham Shoal and Dudgeon Extension Projects 336000 River Figure 20.3 Glaven Water Body Receptors Sheet 2 of 6

Legend: PEIR Boundary WFD River Water Bodies Main River IDB Drain Watercourse Legend: WFD River Water Body Catchments Blackwater Drain (Wensum)

334000 Bure (Scarrow Beck to Horstead Mill) Bure (u/s confluence with Scarrow Beck) Glaven Mermaid Stream Scarrow Beck

Scarrow Beck 332000

Data Sources: Environment Agency, 2020; © Royal HaskoningDHV 2021 Base Map: © Crown copyright and database rights 2020, Ordnance Survey 0100031673; © OpenStreetMap (and) contributors, CC-BY-SA

River Bure

Craymere Beck 330000

Black Document No: PB8164-RHD-ZZ-ON-DR-Z-0081 Water Co-ordinate System: British National Grid 0 1 2 km

0 0.5 1 Miles

A 16/03/2021 1:35,000 A3 AZ KT MW

REV DATE SCALE SIZE DRW CHK APR

Report: 328000 Water Resources and Flood Risk Preliminary Environmental Information Report (PEIR) 610000 612000 614000 616000 618000

Sheringham Shoal and Dudgeon Extension Projects Figure 20.3 Water Body Receptors Sheet 3 of 6

Legend: PEIR Boundary WFD River Water Bodies Main River IDB Drain

326000 Watercourse Legend: WFD River Water Body Catchments Blackwater Drain (Wensum) Mary's Beck Bure (Scarrow Beck to Horstead Mill) Bure (u/s confluence with Scarrow Beck) The Hevingham Watercourse Mermaid Mermaid Stream Swannington Beck Wensum US Norwich 324000

Blackwater Drain

Data Sources: Environment Agency, 2020; © Royal HaskoningDHV 2021 Base Map: © Crown copyright and database rights 2020, Ordnance Survey 0100031673; © OpenStreetMap (and) contributors, CC-BY-SA 322000

Camping Beck

Document No: PB8164-RHD-ZZ-ON-DR-Z-0081 Co-ordinate System: British National Grid 0 1 2 km

0 0.5 1 Miles

A 16/03/2021 1:35,000 A3 AZ KT MW 320000

REV DATE SCALE SIZE DRW CHK APR

Stone Report: Beck Water Resources and Flood Risk Preliminary Environmental Information Report (PEIR) River Trout Wensum Stream 608000 610000 612000 614000 616000

Trout Sheringham Shoal and Stream Dudgeon Extension Projects Figure 20.3 Water Body Receptors Sheet 4 of 6

River Legend:

318000 Wensum PEIR Boundary WFD River Water Bodies Main River IDB Drain Watercourse Legend: WFD River Water Body Catchments Blackwater Drain (Wensum) Hevingham Watercourse Swannington Beck Tud Wensum US Norwich Yare (Tiffey to Wensum) Yare (u/s confluence with Tiffey - Lower) 316000

Document No: PB8164-RHD-ZZ-ON-DR-Z-0081 Co-ordinate System: British National Grid 0 1 2 km 312000 River 0 0.5 1 Miles Tud

A 16/03/2021 1:35,000 A3 AZ KT MW

REV DATE SCALE SIZE DRW CHK APR

Report: Water Resources and Flood Risk Preliminary Environmental Information Report (PEIR) 310000 608000 610000 612000 614000 616000

Sheringham Shoal and Dudgeon Extension Projects Figure 20.3 Water Body Receptors Sheet 5 of 6 310000

Legend: PEIR Boundary WFD River Water Bodies Main River IDB Drain Watercourse Legend: WFD River Water Body Catchments Intwood Stream Tiffey Tiffey (u/s Wymondham STW) Tributary of Tas Tud

308000 Yare (Tiffey to Wensum) Yare (u/s confluence with Tiffey - Lower)

River Yare

Data Sources: Environment Agency, 2020; © Royal HaskoningDHV 2021 Base Map: © Crown copyright and database rights 2020, Ordnance

306000 Survey 0100031673; © OpenStreetMap (and) contributors, CC-BY-SA

River Tiffey

Document No: PB8164-RHD-ZZ-ON-DR-Z-0081 Co-ordinate System: British National Grid 304000 0 1 2 km

0 0.5 1 Miles

A 16/03/2021 1:35,000 A3 AZ KT MW

REV DATE SCALE SIZE DRW CHK APR

Report: Water Resources and Flood Risk Preliminary Environmental Information Report (PEIR) 302000 Dyke Beck 616000 618000 620000 622000 624000 626000

Sheringham Shoal and Dudgeon Extension Projects

River Figure 20.3 Wensum Water Body Receptors Sheet 6 of 6

Legend: PEIR Boundary Onshore Substation Site WFD River Water Bodies

River Main River 306000 Yare IDB Drain Legend: Watercourse WFD River Water Body Catchments Intwood Stream Tas (Tasburgh to R. Yare) Tiffey (u/s Wymondham STW) Tributary of Tas Yare (Tiffey to Wensum) The Beck 304000

River Tas

Data Sources: Environment Agency, 2020; © Royal HaskoningDHV 2021 Base Map: © Crown copyright and database rights 2020, Ordnance Survey 0100031673; © OpenStreetMap (and) contributors, CC-BY-SA

Intwood Stream 302000

Document No: PB8164-RHD-ZZ-ON-DR-Z-0081 Co-ordinate System: British National Grid 0 1 2 km

0 0.5 1 Miles

300000 A 16/03/2021 1:35,000 A3 AZ KT MW

REV DATE SCALE SIZE DRW CHK APR

Report: Water Resources and Flood Risk Preliminary Environmental Information Report (PEIR) 608000 610000 612000 614000 616000

Sheringham Shoal and Dudgeon Extension Projects Figure 20.4

344000 Groundwater Receptors Sheet 1 of 6

Legend: PEIR Boundary Groundwater Abstractions Licenced WFD Groundwater Body Broadland Rivers Chalk & Crag Legend: North Norfolk Chalk Source Protection Zones 1 2 3 342000

North Norfolk Chalk GB40501G400100

340000 Data Sources: Environment Agency, 2020; © Royal HaskoningDHV 2021. Base Map: © Crown copyright and database rights 2020, Ordnance Survey 0100031673; © OpenStreetMap (and) contributors, CC-BY-SA

338000 Document No: PB8164-RHD-ZZ-ON-DR-Z-0082 Co-ordinate System: British National Grid 0 1 2 km

0 0.5 1 Miles

A 16/03/2021 1:35,000 A3 AZ KT MW

REV DATE SCALE SIZE DRW CHK APR

Report: Water Resources and Flood Risk Preliminary Environmental Information Report (PEIR) 336000

Broadland Rivers Chalk & Crag GB40501G400300 610000 612000 614000 616000 618000

Sheringham Shoal and Dudgeon Extension Projects Figure 20.4 Groundwater Receptors Sheet 3 of 6

Legend: PEIR Boundary Groundwater Abstractions Deregulated Domestic

326000 Licenced

Legend: WFD Groundwater Body Broadland Rivers Chalk & Crag Source Protection Zones 1 2 3 Broadland Rivers Chalk & Crag GB40501G400300 324000

Document No: PB8164-RHD-ZZ-ON-DR-Z-0082 Co-ordinate System: British National Grid 0 1 2 km

0 0.5 1 Miles

A 16/03/2021 1:35,000 A3 AZ KT MW 320000

REV DATE SCALE SIZE DRW CHK APR

Report: Water Resources and Flood Risk Preliminary Environmental Information Report (PEIR) 608000 610000 612000 614000 616000

Sheringham Shoal and Dudgeon Extension Projects Figure 20.4 Groundwater Receptors Sheet 4 of 6

Legend:

318000 PEIR Boundary Groundwater Abstractions Deregulated Domestic Licenced

Legend: WFD Groundwater Body Broadland Rivers Chalk & Crag Source Protection Zones 1 2 3 316000

Document No: PB8164-RHD-ZZ-ON-DR-Z-0082 Co-ordinate System: British National Grid 0 1 2 km 312000 0 0.5 1 Miles Broadland Rivers Chalk & Crag GB40501G400300

A 16/03/2021 1:35,000 A3 AZ KT MW

REV DATE SCALE SIZE DRW CHK APR

Report: Water Resources and Flood Risk Preliminary Environmental Information Report (PEIR) 310000 608000 610000 612000 614000 616000

Broadland Rivers Chalk & Sheringham Shoal and Crag Dudgeon Extension Projects GB40501G400300 Figure 20.4 Groundwater Receptors Sheet 5 of 6 310000

Legend: PEIR Boundary Groundwater Abstractions Deregulated Domestic Licenced

Legend: WFD Groundwater Body Broadland Rivers Chalk & Crag Source Protection Zones 1 2 3 308000

Data Sources: Environment Agency, 2020; © Royal HaskoningDHV 2021.

306000 Base Map: © Crown copyright and database rights 2020, Ordnance Survey 0100031673; © OpenStreetMap (and) contributors, CC-BY-SA

Document No: PB8164-RHD-ZZ-ON-DR-Z-0082 Co-ordinate System: British National Grid 304000 0 1 2 km

0 0.5 1 Miles

A 16/03/2021 1:35,000 A3 AZ KT MW

REV DATE SCALE SIZE DRW CHK APR

Report: Water Resources and Flood Risk Preliminary Environmental Information Report (PEIR) 302000 616000 618000 620000 622000 624000 626000

Sheringham Shoal and Dudgeon Extension Projects Figure 20.4 Groundwater Receptors Sheet 6 of 6

Legend: PEIR Boundary Groundwater Abstractions Deregulated Domestic 306000 Licenced

Legend: Onshore Substation Site WFD Groundwater Body Broadland Rivers Chalk & Crag Source Protection Zones 1 2 3 304000

Broadland Rivers Chalk & Crag GB40501G400300

Document No: PB8164-RHD-ZZ-ON-DR-Z-0082 Co-ordinate System: British National Grid 0 1 2 km

0 0.5 1 Miles

300000 A 16/03/2021 1:35,000 A3 AZ KT MW

REV DATE SCALE SIZE DRW CHK APR

Report: Water Resources and Flood Risk Preliminary Environmental Information Report (PEIR) 608000 610000 612000 614000 616000

Sheringham Shoal and Dudgeon Extension Projects Figure 20.5

344000 Crossing Schedule Sheet 1 of 6

Legend: PEIR Boundary WFD River Water Bodies Main River IDB Drain Watercourse CX003 Legend: Crossing Schedule Watercourse WFD River Water Body Catchments Bure (u/s confluence with Scarrow Beck)

342000 Glaven Scarrow Beck Not part of a river WB catchment 340000 Data Sources: Environment Agency, 2020; © Royal HaskoningDHV 2021. Base Map: © Crown copyright and database rights 2020, Ordnance Survey 0100031673; © OpenStreetMap (and) contributors, CC-BY-SA

338000 Document No: PB8164-RHD-ZZ-ON-DR-Z-0083 Co-ordinate System: British National Grid 0 1 2 km

0 0.5 1 Miles

A 16/03/2021 1:35,000 A3 AZ KT MW

REV DATE SCALE SIZE DRW CHK APR

Report: Water Resources and Flood Risk Preliminary Environmental Information Report (PEIR) 336000 608000 610000 612000 614000 616000 618000

Sheringham Shoal and Dudgeon Extension Projects 336000 Figure 20.5 Crossing Schedule Sheet 2 of 6

Legend: PEIR Boundary WFD River Water Bodies Main River IDB Drain Watercourse Legend: Crossing Schedule Main River

334000 Watercourse WFD River Water Body Catchments Blackwater Drain (Wensum) Bure (Scarrow Beck to Horstead Mill) Bure (u/s confluence with Scarrow Beck) Glaven Mermaid Stream CX026 Scarrow Beck 332000

330000 CX032

Document No: PB8164-RHD-ZZ-ON-DR-Z-0083 Co-ordinate System: British National Grid 0 1 2 km

0 0.5 1 Miles

CX038 A 16/03/2021 1:35,000 A3 AZ KT MW

REV DATE SCALE SIZE DRW CHK APR

Report: 328000 Water Resources and Flood Risk Preliminary Environmental Information Report (PEIR) 610000 612000 614000 616000 618000

Sheringham Shoal and Dudgeon Extension Projects Figure 20.5 Crossing Schedule Sheet 3 of 6

Legend: PEIR Boundary WFD River Water Bodies Main River IDB Drain

326000 Watercourse Legend: Crossing Schedule IDB Watercourse Watercourse WFD River Water Body Catchments Blackwater Drain (Wensum) Bure (Scarrow Beck to Horstead Mill) Bure (u/s confluence with Scarrow Beck) Hevingham Watercourse Mermaid Stream Swannington Beck Wensum US Norwich 324000

Document No: PB8164-RHD-ZZ-ON-DR-Z-0083 Co-ordinate System: British National Grid 0 1 2 km

0 0.5 1 Miles

A 16/03/2021 1:35,000 A3 AZ KT MW 320000

REV DATE SCALE SIZE DRW CHK APR

Report: Water Resources and Flood Risk CX061 Preliminary Environmental Information Report (PEIR)

CX067 CX063 CX065 608000 610000 612000 614000 616000

Sheringham Shoal and CX067 CX063 Dudgeon Extension Projects CX065 Figure 20.5 Crossing Schedule Sheet 4 of 6

Legend:

318000 PEIR Boundary WFD River Water Bodies Main River IDB Drain Watercourse Legend: Crossing Schedule IDB Watercourse Main River CX078 Watercourse CX082 WFD River Water Body Catchments CX077 Blackwater Drain (Wensum) CX080 Hevingham Watercourse Swannington Beck 316000 Tud Wensum US Norwich Yare (Tiffey to Wensum) Yare (u/s confluence with Tiffey - Lower)

Document No: PB8164-RHD-ZZ-ON-DR-Z-0083 Co-ordinate System: British National Grid 0 1 2 km 312000 0 0.5 1 Miles

CX099 A 16/03/2021 1:35,000 A3 AZ KT MW

REV DATE SCALE SIZE DRW CHK APR

Report: Water Resources and Flood Risk Preliminary Environmental Information Report (PEIR) 310000 608000 610000 612000 614000 616000

Sheringham Shoal and Dudgeon Extension Projects Figure 20.5 Crossing Schedule Sheet 5 of 6 310000

Legend: PEIR Boundary WFD River Water Bodies Main River IDB Drain Watercourse Legend: Crossing Schedule CX108 Main River Watercourse CX110 WFD River Water Body Catchments Intwood Stream Tiffey

308000 Tiffey (u/s Wymondham STW) Tributary of Tas CX112 Tud Yare (Tiffey to Wensum) Yare (u/s confluence with Tiffey - Lower)

CX119

CX120

Document No: PB8164-RHD-ZZ-ON-DR-Z-0083 CX125 Co-ordinate System: British National Grid 304000 0 1 2 km

CX124 CX137 0 0.5 1 Miles

CX145 A 16/03/2021 1:35,000 A3 AZ KT MW

REV DATE SCALE SIZE DRW CHK APR

Report: Water Resources and Flood Risk Preliminary Environmental Information Report (PEIR) 302000 616000 618000 620000 622000 624000 626000

Sheringham Shoal and Dudgeon Extension Projects Figure 20.5 Crossing Schedule Sheet 6 of 6

Legend: PEIR Boundary Onshore Substation Site WFD River Water Bodies Main River 306000 IDB Drain Legend: Watercourse Crossing Schedule Main River Watercourse WFD River Water Body Catchments Intwood Stream Tas (Tasburgh to R. Yare) Tiffey (u/s Wymondham STW) Tributary of Tas Yare (Tiffey to Wensum) 304000

CX137

CX145 Data Sources: Environment Agency, 2020; © Royal HaskoningDHV CX149 2021. Base Map: © Crown copyright and database rights 2020, Ordnance Survey 0100031673; © OpenStreetMap (and) contributors, CC-BY-SA CX148 302000

Document No: PB8164-RHD-ZZ-ON-DR-Z-0083 Co-ordinate System: British National Grid 0 1 2 km

0 0.5 1 Miles

300000 A 16/03/2021 1:35,000 A3 AZ KT MW

REV DATE SCALE SIZE DRW CHK APR

Report: Water Resources and Flood Risk Preliminary Environmental Information Report (PEIR)