Energy from Waste (EfW) Facility, Protos Plot 8 Flood Risk Assessment 660941-03-03 Rev01

APPENDIX D PREVIOUS ENVIRONMENT

AGENCY DATA

Energy from Waste (EfW) Facility, Protos Plot 8 Flood Risk Assessment 660941-03-03 Rev01

APPENDIX E CURRENT ENVIRONMENT

AGENCY DATA

_̂

Tang Running

West Central Drain 1

Western Boundary Drain

East Central Drain 1

East Central Drain 2

Defences Map centred on Ince Marshes, Elton GMMC14816KE created 16/06/2016

Contact Us: National Customer Contact Centre, PO Box 544, Rotherham, S60 1BY. Tel: 08708 506 506 (Mon-Fri 8-6). Email: enquiries@environment-agency.gov.uk© Environment Agency copyright and / or database rights 2016. All rights reserved. © Crown Copyright and database right. All rights reserved. Environment Agency, 100026380, 2016.

Legend_̂ Site Location

Main RiverAreas Benefiting from Defences

DefencesASSET_ID

3418934290172827174262184580

¯1:10,000

16th June 2016 Ince Marshes, Elton GMMC14816KE

Map Reference Model Node Reference Easting Northing Data1 % AEP (1 in 100

year)

1 % AEP (1 in 100

year) + Climate

Change*

0.5 % AEP (1 in

200 year)

0.1 % AEP (1 in

1000 year)

1 % AEP (1 in 100

year)

1 % AEP (1 in 100

year) + Climate

Change*

0.5 % AEP (1 in 200

year)

0.1 % AEP (1 in

1000 year)

1 % AEP (1 in

100 year)

1 % AEP (1 in

100 year) +

Climate Change*

0.5 % AEP (1 in

200 year)

0.1 % AEP (1 in

1000 year)

1 % AEP (1 in 100

year)

1 % AEP (1 in

100 year) +

Climate Change*

0.5 % AEP (1 in

200 year)

0.1 % AEP (1 in

1000 year)

1 % AEP (1 in

100 year)

1 % AEP (1 in 100

year) + Climate

Change*

0.5 % AEP (1 in

200 year)

0.1 % AEP (1 in

1000 year)

Modelled Water Level (m aodN) 4.50 4.85 4.64 6.86 4.50 4.84 4.64 6.86

Modelled Flow (cumecs) 146.24 138.14 133.29 349.06 135.64 153.73 125.45 349.92

Modelled Water Level (m aodN) 4.64 4.85 4.64 6.86 4.64 4.84 4.64 6.86

Modelled Flow (cumecs) 148.29 140.52 135.34 337.08 138.07 155.65 127.23 337.83

Modelled Water Level (m aodN) 4.56 4.85 4.64 6.85 4.56 4.84 4.63 6.85

Modelled Flow (cumecs) 149.11 141.98 139.28 325.26 140.42 156.27 130.1 325.94

Modelled Water Level (m aodN) 4.62 4.85 4.63 6.85 4.62 4.84 4.63 6.85

Modelled Flow (cumecs) 156.43 147.68 143.06 315.47 148.9 162.67 135.39 315.98

Modelled Water Level (m aodN) 3.53 3.67 3.57 3.66 7.06 8.08 7.36 7.36 5.91 6.27 5.91 7.42

Modelled Flow (cumecs) 0.28 0.35 0.31 0.35

Modelled Water Level (m aodN) 3.47 3.59 3.52 3.60 7.17 8.05 7.34 7.34 5.85 6.26 5.85 7.40

Modelled Flow (cumecs) 0.3 0.36 0.36 0.57

Modelled Water Level (m aodN) 3.54 3.68 3.58 3.67 7.18 8.06 7.35 7.35 5.88 6.27 5.88 7.41

Modelled Flow (cumecs) 0.62 0.66 0.65 0.77

Modelled Water Level (m aodN) 3.56 3.71 3.60 3.69 7.16 8.03 7.33 7.33 5.82 6.26 5.82 7.38

Modelled Flow (cumecs) 0.6 0.64 0.63 0.76

Model data taken from Manchester Ship Canal 2010 Study, Ince and Frodsham Fluvial 2011 Study and Ince and Frodsham Tidal 2011 Study

Notes:

AEP - Annual Exceedence Probability

m aodN - metres above ordnance datum Newlyn

cumecs - cubic metres per second

Defences

Asset Type Asset ID Overall Condition Grade Upstream Actual Crest Level

high_ground 184580 3

high_ground 34290 3

high_ground 34189 3

high_ground 172827 3

high_ground 174262 3

3.31

4.93

6.24

4.93

4.21

Downstream Actual Crest Level

346532

377672

377514

377434

377352

Standard of Protection

*Climate Change Scenario based on the previous guidance - 20% increase in flow. The new climate change guidance is available at

https://www.gov.uk/guidance/flood-risk-assessments-climate-change-allowances

The location of the site and the type (vulnerablility) of development determine the climate change allowances to consider in any flood risk

assessment.

345807

Representative of present conditions (i.e. all gates are operational as per

the agreed automated protocol). This scenario is used for our flood risk

mapping. (4 gates open)

Representative of a single gate failure on every set of sluice structures.

This will define the residual risk. (3 gates open)Ince and Frodsham Fluvial 2011 Defended Ince and Frodsham Tidal 2011 Ince and Frodsham Fluvial 2011 Undefended

ea013_Model_MSCC02_362

ea013_Model_MSCC02_364

ea013_Model_MSCC02_366

ea013_Model_MSCC02_368

2

377362

347272

346683

346076

3454864

346460

100

100

100

5

376792

377312

377154

346325ea013_Model_WESB01_00004

ea013_Model_WESB01_00005

ea013_Model_WCDR01_00008

ea013_Model_WCDR01_00010

7

8

1

6

3.53

3.31

7.04

6.24

3.04

100

100

3

_̂

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2

3

57

8

6

1

Tang Running

West Central Drain 1

Western Boundary Drain

East Central Drain 1

Detailed Flood Map centred on Ince Marshes, Elton GMMC14816KE created 16/06/2016

Contact Us: National Customer Contact Centre, PO Box 544, Rotherham, S60 1BY. Tel: 08708 506 506 (Mon-Fri 8-6). Email: enquiries@environment-agency.gov.uk© Environment Agency copyright and / or database rights 2016. All rights reserved. © Crown Copyright and database right. All rights reserved. Environment Agency, 100026380, 2016.

Legend_̂ Site Location

") Model MeasurementsMain RiverFlood Zone 3Flood Zone 2Areas Benefiting from Defences

¯1:10,000

Energy from Waste (EfW) Facility, Protos Plot 8 Flood Risk Assessment 660941-03-03 Rev01

APPENDIX F PREVIOUS ENVIRONMENT

AGENCY CORRESPONDENCE