hart district council strategic flood risk assessment...waverley level 2 sfra august 2016 (updated...

Waverley Borough Council Level 2 Strategic Flood Risk Assessment August 2016 (Updated December 2016)

Waverley Level 2 SFRA August 2016 (updated December 2016)

Quality Management

Job No CS082381

Project Waverley Borough Council Level 2 SFRA

Location F:\Environment\ZWET\CS082381 Waverley SFRA2

Title Waverley Borough Council Level 2 SFRA

Document Ref Waverley Borough Council Level 2 SFRA

Issue / Revision Final

Date 18 August 2016

Prepared by Tom Godman, Nicole Shamier, Stephanie Kerr, Rebecca Muntus.

Signature (for file) NS

Checked by Christopher Despins Signature (for file) CD

Authorised by Christopher Despins Signature (for file) CD

Revision Status / History

Rev Date Issue / Purpose/ Comment Prepared Checked Authorised

1 October

2013815

Draft for Submission to WBC NS/ SK/ TG LM LM

2 December

2015

Updates on Draft report to WBC.

Inclusion of two extra sites.

NS/ SK /TG LM NS LM

3 February

2016

Inclusion of two extra sites to

report

TG NS LM

4 April 2016 Inclusion of two extra sites to

report

TG / RM NS CD

5 August

2016

Removal of sites 899, 773, 395

and 29 which have planning

permission. Removal of 343,

615, and 27 which went red.

Inclusion of a more detailed risk

matrix. Inclusion of the

NS CD CD


sequential test process. Inclusion

of reasons for rejection table.

Expansion of table 4.2 with

exception test compatibility.

6 December

2016

Amendments to the Executive

Summary, Chapter 1, Chapter 3,

Appendix C and Appendix D to

correct minor errors and to

address the Environment

Agency’s comments.

BT MP MP

This document is the property of the Waverley Borough Council. If you have received it in error, please

return it immediately to the above named Local Authority.

This report has been prepared by Capita Property and Infrastructure Limited with all reasonable skill, care and diligence within the terms of the Contract with the Client, incorporating our General Terms and Conditions of Business and taking account of the resources devoted to it by agreement with the client. We disclaim any responsibility to the client and others in respect of any matters outside the scope of the above. This report is confidential to the client and we accept no responsibility of whatsoever nature to third parties to whom this report, or any part thereof, is made known. Any such party relies on the report at their own risk.


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Contents Executive Summary 6

1. Introduction 7

2. Local Geography 9 2.1 The Catchment 9 2.2 Historic flooding 9 2.3 Flood risk management infrastructure 12

3. Sequential Test 14

4. SFRA2 study sites 15

5. Strategic Flood Risk Assessment 20

6. Flood Risk Assessment Summary 21

7. Reducing flood risk on site 23 7.1 SuDS Techniques 23 7.2 Design of SuDS techniques 25 7.3 Incorporating SuDS into a site plan 25 7.7 SuDS Constraints 26

8. Conclusion 27

11. References 28

12. Glossary and Notation 29

Appendix A – Flood Risk Datasets 31

Appendix B – Planning Process 33

Appendix C - Absolute Ranking of LAA sites by Flood Risk 34

Appendix D – LAA Site Rating (Green/Red) 45

Figures Figure 2-1 – Total Internal property flooding from Sewers within

Waverley 12 Figure 4-1: Flood Risk Suitability Assessment Criteria 20 Figure B-1 Taking flood risk into account in the preparation of a Local

Plan (DCLG, 2014) 33

Tables Table 2-1 - Information from historic flooding records (limited

information available) 10 Table 2-2 – Identified areas by Parish Councils that are

susceptible/have experienced surface water flooding 11 Table 4-1 Definition of Flood Zones (Table 1, PPG) 15 Table 4-2 Sites assessed as part of the Level 2 SFRA 17 Table 5-1 Flood Risk Categories by Flood Type 20 Table 6-1: Summary of Flood Suitability Scores 21 Table 7-1 – Summary of SuDS Techniques and their suitability to meet

the three goals of sustainable drainage systems 24 Table A-1 Flood risk datasets 31


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Executive Summary

This Level 2 Strategic Flood Risk Assessment (SFRA2) has been completed on behalf of Waverley

Borough Council (WBC). The results of WBCs Level 1 Strategic Flood Risk Assessment (SFRA1)

showed that land outside of flood risk areas cannot appropriately accommodate all the necessary

development therefore WBC requested that a SFRA2 should be carried out to provide the information

necessary for the application of the Exception Test.

The National Planning Policy Framework (NPPF) Sequential Test is a risk based approach to

determine the suitability of development according to flood risk from fluvial and tidal sources. The

NPPF requires Local Planning Authorities (LPA) to apply the Sequential Test at all stages of planning

process to ensure that where possible developments are removed from areas with a high probability

of flooding.

If following the application of the Sequential Test, it is not possible for the development to be located

in zones with lower probability of flooding; the Exception Test can be applied. For the Exception Test

to be passed it must be demonstrated that the development provides wider sustainability benefits (as

addressed through a sustainability appraisal)1. Secondly, it must be demonstrated that the

development will be safe for its lifetime, without increasing flood risk elsewhere, and where possible,

will reduce flood risk overall. The purpose of this SFRA2 is to assess all source of flood risk for 15

potential development sites as identified by WBC in its Land Availability Assessment (LAA).

The site assessments use a desktop based assessment of currently available flood risk information

for “all sources” of flood risk. Chapter 7 discusses appropriate methods for ‘reducing flood risk on site’

along with possible sustainable drainage techniques.

A flood risk suitability assessment criteria was developed whereby each site was allocated a flood risk

suitability score based upon the levels of flood risk on site and the ability for that site to develop,

avoiding high areas of flood risk, incorporating safe egress and including on site SuDS. More

information on the scoring can be found in Chapter 5.

Detailed proformas have been produced for the 15 sites assessed and these have been published

alongside this report.

The development needs to be designed to ensure there is safe access and egress during an

emergency. Access considerations should include the voluntary and free movement of people during

a ‘design flood’ as well as potential for evacuation before a more extreme flood conditions. This will be

contingent on the way that the development is designed. Although this SFRA2 helps to inform

whether the sites could be designed to manage the risks of flooding, the suitability of specific

development designs will be tested during a site specific Flood Risk Assessment (FRA) as part of the

planning application process.

1 http://planningguidance.planningportal.gov.uk/blog/guidance/strategic-environmental-assessment-

andsustainability- appraisal/sustainability-appraisal-requirements-for-local-plans/


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1. Introduction

WBC commissioned Capita to undertake a SFRA2 study. This study considers the flood risk at 15

potential development sites identified by the Council in its Land Availability Assessment. The results

will inform the Council’s assessment of the sites’ suitability for inclusion as part of the housing supply

to be identified in the new Local Plan Part 1 (Strategic Policies and Sites). This document builds on the work which was included in the Level 1 SFRA (Volume 1: Decision Support Document; Volume 2: Technical Report of the SFRA and associated maps). The Level 1 SFRA provides information on the strategic approach to flood risk, alongside local policy and background information and it should be read in conjunction with this SFRA2. The SFRA2 has been commissioned because the evidence from the Level 1 SFRA showed that land outside areas at risk of flooding cannot appropriately accommodate all necessary development. This SFRA2 provides the information necessary for application of the Exception Test. The Exception Test ensures that new development sites located in areas at risk of flooding (because no suitable alternative sites are available) satisfactorily manage flood risk to people and property. The location of the sites in areas of flood risk must demonstrate that they provide wider sustainability benefits to the community that outweigh flood risk and that the development will be safe in its lifetime (which is assumed as 100 years for residential property). The development should not increase flood risk elsewhere and where possible reduce flood risk overall. This SFRA2, therefore:

Facilitates application of the Exception Tests

Consider the nature of flood hazards to potential development sites at risk of flooding

Supports the application of the Sequential Test (which ensures development is predominately situated in the lowest areas of flood risk)

Recommends solutions to ensure any new development is safe from flooding in its lifetime and does not increase flood risk elsewhere.

Flood risk hazard mapping is available for sites in close proximity to the Lower Wey, River Blackwater and Cranleigh. Where the site is within the EA’s (EA) Flood Zone 3 in these areas, flood hazard mapping has been assessed. In order to assess the severity of flood risk hazards and recommend solutions, this document considers the following:

• flood probability; • flood depth (where 2D data is available); • flood velocity (where velocity data is available); • rate of onset of flooding; and • duration of flood

The scoring approach and results of the strategic flood assessment can be found in chapters 4 and 6.

An assessment was undertaken to determine the risks of flooding occurring at each site. The site was

analysed to consider flood risk from fluvial, surface water and sewer flooding and flooding from

artificial sources. The area surrounding the site was then assessed to determine if there are any flood

defences, flood alleviation schemes or flood warning systems which benefit the site. The fluvial flood

risk of each site was analysed using hydraulic models. Where there were access or egress issues,

these were identified.


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Two hydraulic models were made available covering the proposed sites of investigation: the 2009

Lower Wey hydraulic model has been used to assess fluvial flood risk along the lower areas of the

River Wey within WBC area and the Blackwater Model (2007) has been used to assess fluvial flood

risk along a small area to the north of WBC. The residual fluvial flood risk, which considers the failure

of flood risk management infrastructure (breach or overtopping), was determined for the Lower Wey

using the undefended 2009 model.

There are no flood defences in the area within the Blackwater model area, thus the residual fluvial risk

and actual fluvial risk are considered the same. Fluvial flood risk was determined using the flood

depth outlines for a 1 in 20 year annual chance fluvial flood scenario and a 1 in 100 year annual

chance fluvial flood scenario. The 1 in 100 year plus climate change annual chance fluvial flood

scenario, which shows the flood risk of the ‘as built’ model plus a 20% increase in flow, was assessed

and mapped if the flood outline was different to the 1 in 100 year return period.

The risk of flooding from surface water was determined using the EA’s Risk of Flooding from Surface

Water mapping, more commonly referred to as the UFMfSW. The risk of surface water flooding was

assessed for the 1 in 30 year annual chance pluvial flood scenario, 1 in 100 year annual chance

pluvial flood scenario and 1 in 1000 year annual chance pluvial flood scenario.

The risk of sewer flooding at each site was determined using the January 2015 postcode DG5 register

incident count (provided by Thames Water), which counts the number of internal and external sewer

incidents which have occurred within the postcode area of the site.

Finally the risk of flooding from artificial sources is determined using the EA’s Risk of Flooding from

Reservoirs mapping to assess the flood depth of any reservoir over 25000m3 of water, which has

breached its flood defences. The risk of flooding from all reservoirs less than 25,000m3, canals and

lakes have been assessed using topographic data.

Having assessed the data and quantified the level of fluvial, surface water, sewer and artificially

sourced flood risk, we provided guidance to inform policy development, discuss the prospect of

compliance within the Exception Test and deliver a Flood Risk Suitability Score for each site.

Note that this document does not replace, and should be read in conjunction with, national and regional policy including NPPF and relevant regional policy. The SFRA2 does not replace the responsibility at a broader level to consider wider catchment flood risk management approaches and solutions, nor does it remove the requirement for appropriately focused local/site FRA’s at the planning application stage.


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2. Local Geography

2.1 The Catchment

The Waverley area incorporates the catchments of four main watercourses: the River Wey, Cranleigh Waters (a tributary of the Wey), the River Lox (a tributary to the upper River Arun), and to a minor extent the River Blackwater at the northern study area boundary. As well as the main watercourses there are a number of smaller tributaries including the Holdhurst Brook, Littlemead Brook, Nuthurst Stream, Hascombe Stream, Alderbrook Stream, Royal Brook, Truxford Brook, Farnham Bourne and Frensham Vale Stream all within the Wey catchment; and the Hambledon Brook within the Arun catchment. The Wey and Arun Canal, managed by the Wey and Arun Canal Trust, passes through the Waverley area. The Level 1 SFRA provides further geographical information on the size of the catchment we are considering, topography, geology and direction of flows for the main watercourses within the catchment.

2.2 Historic flooding

This section summarises instances of historic flooding which have occurred in the catchment. More

information on historic flooding incidents, including maps, can be found in the Level 1 SFRA report.

2.2.1 Fluvial Flooding

Flooding from rivers has occurred in the catchment every few years in most recent times. The EA recorded outlines dataset shows that the fluvial flood incidents occurred in 1947, 1960, 1968, 1974, 1979, 1981, 1990, 2000 and 2003. However, this incident list does not include incidents that occurred in December 1999, July 2007, Winter 2008/09 (in Bramley from Cranleigh Waters), and more recently the region-wide flooding of Winter 2013/14.

Several areas have been identified in Surrey County as having experienced flooding from fluvial sources. These include roads in Milford, vulnerable to the Ock tributary, and road junctions in Elstead, as supported by Parish Council reports. The Ock was identified as having overtopped twice in the past 20 years. Other recognised flood areas include Bramley High Street.


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Table 2-1 - Information from historic flooding records (limited information available)

Year of Incident River Location Comment on flooding 1947 Wey

Godalming, Elstead and Milford

Property and roads flooded

1960 Wey (North Branch) Farnham Property and roads flooded

River Lox Chiddingfold Road junction flooded

1968

WBC wide Several hundred properties flooded across the area

Wey (North Branch) Farnham Roads flooded

River Lox

Chiddingfold Property and roads flooded

Tilford Roads flooded

Elstead Roads flooded

Dunsfold Property and roads flooded, bridge destroyed

1981 Wey Godalming Roads flooded

1990 WBC wide Property and roads flooded

1999 Wey Tilford Localised flooding

Elstead Localised flooding

2000

WBC wide Property and roads flooded

Wey (North Branch) Farnham Extensive catchment wide flooding

Wey Tilford Roads flooded

Cranleigh Waters

Cranleigh Flooding from Littlemead Brook

Bramley Flooding of property and roads

2003 Wey Godalming Roads flooded

2007 No spatial / temporal data reported.

2009 No spatial / temporal data reported.

2013/14 WBC wide Property and roads flooded

2.2.2 Surface Water Flooding Historic records of surface water flooding include the EA Recorded Outlines dataset and the WBC Wetspot database. The WBC Wetspot database records reported flooding incidents along roads that can almost entirely be attributed to surface water causes, as road flooding typically results from drainage problems.

Several Parish Councils provided useful information regarding areas which have experienced flooding

or ongoing flooding problems. These included the Witley, Busbridge, Elstead, Ewhurst and Ellens

Green, and Hambledon Parish Councils. Depending on the description provided, the majority of these

incidents were determined as having a surface water source of flooding, and a total of 23 individual

affected areas were identified.


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Table 2-2 – Identified areas by Parish Councils that are susceptible/have experienced surface

water flooding

Parish Location Causes Identified Issues

Chiddingfold Prestwick Lane High run off, private flood measures and traffic damaging ditches

Blocked grills and drains, and broken under-road culverts

Hambledon Hambledon Road Ditches and drains not coping

Ewhurst Plough Lane, Horsham Lane and The Glebe residential area

None provided Culverts not withstanding flow

Elstead Farnham Road, Somerset Bridge, Springfield Way and Orchard Close

None provided - occurred during Winter 2013/14

Witley

Station Lane, Jubilee Fields, Lower Mousehill Lane, Milford Heath Road, Oxted Green, Cramhurst Lane, Fasden Lane, A283, Combe Lane, Brook, Haslemere Road, Petworth Road, new Road, Gasden Copse, Middlemarch and Lakes Lane.

Many of the causes for these have been described as having been improved by drain maintenance and alerting the SCC/WBC. Many of these incidents are described as occurring following heavy rain.

Private owners filling in ditches, failure to maintain ditches, blockages occurring

2.2.3 Sewer Flooding The Thames Water DG5 register records 52 flood incidents resulting in internal property flooding, and 82 external flooding incidents. The records indicate that internal property flooding has occurred predominantly for the larger scale (but less frequent) flooding incidents (5% AEP incidents), whilst more external flooding has been reported during smaller scale (but more frequent) incidents (10% AEP and 20% AEP incidents). The majority of recorded incidents have occurred in densely populated postcode areas, such as GU7, GU9 and GU8, which encompass Godalming, Farnham and Cranleigh town centres respectively. These postcodes fall within the Wey catchment, encompassing the Northern Wey branch, River Wey and Cranleigh Waters tributaries.


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Figure 2-1 – Total Internal property flooding from Sewers within Waverley

2.2.4 Groundwater Flooding

There are very few records of groundwater flooding across Waverley. Based on previous records

made available it appears groundwater flooding has historically occurred in Upper Hale, Godalming,

Elstead, Churt, Shottermill, Wormley, Witley, south of Busbridge, and Cranleigh. Hambledon is noted

as being within the South East England Regional Flood Risk Assessment as being at risk from

groundwater flooding. However in the examples of Upper Hale and Cranleigh, it is more likely that the

recorded flooding problems were related to water logging and poor surface water drainage than

groundwater flooding. The lack of flood incident records may not be reflective of the occurrence of groundwater flooding, as groundwater flooding may occur following prolonged rainfall events simultaneously with other types of flooding. Furthermore, it is likely that fewer incidents are reported throughout the study area because of the high proportion of land which is rural in nature.

2.3 Flood risk management infrastructure

According to the flood defence dataset provided by the EA, within the flood map for planning dataset, the only formal recorded defence present in the study area is along the Wey northern branch channel at Farnham. This defence is a two-stage channel that was constructed in 1975. There are also two weirs, built as part of the River Wey Improvement Scheme (Catteshall and Unstead Weir) which are classified as flood defence assets. There are several other local def ences within Farnham that are associated with the Farnham Flood Alleviation Scheme (FAS). Following the winter floods of 2013/14, more work has been completed within the borough to develop and maintain flood defences. More information on this is outlined in the Level 1 SFRA.

0

2

4

6

8

10

12

14

16

GU

10

3

GU

10

4

GU

11

1

GU

11

3

GU

26

6

GU

27

1

GU

27

2

GU

51

3

GU

6 7

GU

6 8

GU

7 3

GU

8 4

GU

8 5

GU

9 0

GU

9 7

GU

9 8

GU

9 9

5% AEP

10% AEP

20% AEP


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Following significant flooding during the winter of 2013/14, which affected much of the UK, WBC have developed the Winter Readiness 2014-15 report

2 that reviews the various methods and inputs of

stakeholders in improving the resilience of infrastructure in Waverley. These include significant maintenance, reconstructions and measures to reduce flood risk across the Borough. In Waverley, several local flood alleviation schemes (FAS) have been established and incorporate engineering flood defences and strategies to reduce risk, and include:

Farnham FAS – engineered and altered channel sections, and bank protection, that act to redirect out of bank flows into the River Wey channel upstream of Farnham;

Kiln Lane FAS

Godalming Centre FAS - approximately 200m of flood relief channel with channel maintenance and bank protection associated with the River Wey.

There is also an EA led FAS within Waverley, at Bishop’s Meadow Farnham, which involves floodplain restoration and environmental enhancements.

Assessments are being conducted into the viability of a FAS at Haslemere and further flood defence schemes in Godalming that would involve raised defences. Funding is currently being discussed for the latter.

The EA is currently progressing The Wey Flood Alleviation Scheme (Wey FAS) which includes identifying a viable scheme for various locations along the Wey, one of which is in Godalming which would protect over 73 properties. A preferred option has been selected at an outline level; a full appraisal will be completed and the impact of this should be considered when assessing future flood risk.

2 Winter Readiness 2014-15 report. Waverley Infrastructure Resilience Group, November 2014


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3. Sequential Test

The principle aim of the Sequential Test is to direct new development to areas of lowest flood risk. Where there are no available sites in Flood Zone 1 the vulnerability of a site may be considered and used to direct development to alternative sites in Flood Zone 2 followed by Flood Zone 3, applying the Exception Test, if required.

Appendix C is a ranking of all the housing sites assessed in the LAA according to all known sources of flood risk. Sites outside of the flood plain (i.e. Flood Zone 1) are grouped, but achieve an ultimate ranking based on the relative levels of surface water flood risk and ground water susceptibility. Note that since this table has been drafted, the proportions in flood zones 2 and 3 have been refined with more recent Flood Zone data so the percentages in Chapter 6 are more up to date percentages. The difference between data does not change the conclusions of the report.

Part 1 of the Local Plan allocates only strategic development sites. For the purposes of the plan strategy, these comprise housing sites, or mixed use including housing, for (or include) 100 or more dwellings, as well as a single employment allocation. In order for the local plan to be ‘sound’, it must be demonstrated that its policies and proposals meet the area’s assessed housing need over the plan period. That need cannot be met entirely by the strategic sites, so it will be necessary to show that there are enough other suitable, developable and deliverable sites to meet the need. Part 2 of the plan will deal with the non-strategic policies and sites, but in accordance with paragraphs 100 to 102 of the NPPF and the associated NPPG, all allocations are required to pass the sequential test, including those that may be identified by Neighbourhood Plans. In that respect, the plan must be able to provide the reassurance that these ‘Part 2/Neighbourhood Plan’ sites are available in the areas at lowest flood risk

Appendix D shows that of the potential housing sites rated ‘green’ in the LAA, 64 are located within Flood Zone 1. This left 15 sites that are partly or wholly within Flood Zones 2, 3a or 3b. These have been subject to a more detailed site assessment to determine whether the site is appropriate for development and therefore would pass the sequential test. These more detailed site assessments are in a series of proformas that have been published alongside this document. An explanation of why sites are rated ‘green’ despite being within Flood Zones 2, 3a or 3b can be found in the detailed proformas for each of the 15 sites in Appendix 4a of the LAA.

The reasons why sites rated ‘red’ (some of which are in Flood Zone 1) were rejected for housing, employment or mixed use development can be seen in Appendices 1B, 1C and 1D of the LAA. More information on the rationale for the rejection of sites, including why it is important to safeguard all good quality employment sites, can be found in the LAA covering report. Paragraph 3.25 of the LAA covering report explains how flood risk was taken into account in assessing the suitability of potential development sites.


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4. SFRA2 study sites

This SFRA2 considers the flood risk of 15 potential development sites which are situated in flood

risk zones 2 or 3. Zone 2 is defined as having a medium probability of flood risk; Zone 3a is

defined as a high probability of flood risk and Zone 3b is defined as the functional floodplain.

Functional floodplains have a 5% chance of flooding in any year and are therefore designated as

areas where flood water has to flow or be stored during times of flood.

Table 4-1 Definition of Flood Zones (Table 1, PPG3)

Flood Zone Definition Zone 1 - Low probability

Land having a less than 0.1% annual probability of river or sea flooding. (Shown as ‘clear’ on the Flood Map – all land outside Zones 2 and 3

Zone 2 - Medium Probability

Land having between a 1% and 0.1% annual probability of river flooding; or Land having between a 2% and 0.1% annual probability of sea flooding. (Land shown in light blue on the Flood Map)

Zone 3a - High Probability

Land having a 1% or greater annual probability of river flooding; or Land having a 2% or greater annual probability of sea flooding. (Land shown in dark blue on the Flood Map)

Zone 3b - The Functional Floodplain

This zone comprises land where water has to flow or be stored in times of flood. Local planning authorities should identify in their Strategic Flood Risk Assessments areas of functional floodplain and its boundaries accordingly, in agreement with the EA. (Not separately distinguished from Zone 3a on the Flood Map)

The 15 sites we are assessing in this SFRA2 have varying levels of flood risk. Some of the sites

have areas within them with in flood zone 1; and therefore can be designed in a way which places

properties away from the flood risk.

3 Planning Practice Guidance, Flood Risk and Coastal Change, March 2014


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Table 4-2 outlines the sites and the proportion which overlaps with flood zones 2, 3a and 3b. Note

that land in flood zones 3a and 3b will also be in Flood Zone 2. For example, for site 16, 28.3% is

in flood zone 3b and at risk of flooding with a 5% or greater annual probability of river flooding,

30.9% is in flood zone 3a with a 1% or greater annual probability of river flooding (which includes the

land in flood zone 3b) and 33.8% is in flood zone 2 with a 0.1% or greater annual probability of river

flooding (which includes the land in flood zones 3a and 3b).

In some cases, detailed flood modelling has superseded the Flood Zone outlines, but for planning

purposes, we consider Flood Zones in the first instance.


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Table 4-2 Sites assessed as part of the Level 2 SFRA

ID Address % overlap with Zone 2

% overlap with Zone 3a

% overlap with Zone 3b

Estimated yield (no. of dwellings)

Size of site (ha.)

Flood Risk Vulnerability

Compatible?

25 West of Badshot Lea

6 0 0 140 6.14 More vulnerable

Yes

285 The Bush Hotel, The Borough, Farnham

98.4 0 0 5 0.10 More

vulnerable Yes, more vulnerable development can be built in FZ2.

29 Coxbridge Farm, Alton Road, Farnham

2.2 1.9 0 340 14.21

More vulnerable

Exception test required. Could pass the test provided that the majority of development takes place within the part of the site within Zone 1.

245 5 - 21 Wey Hill, Haslemere

8 7.2 0 39 0.3

More vulnerable


141 West Street, Haslemere

7.4 7.4 0 50 2.1

More vulnerable


450 Opposite Milford Golf Club, Witley

13 10.8 0 180 10.9

More vulnerable


264 Victoria House, South Street,

100 20.5 0 8 0.06 More vulnerable

Exception test required. Reasonable prospect of passing


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Size of site (ha.)


Compatible?

Farnham the test provided that the majority of development takes place within the part of the site within Zone 2

94 Land behind Church Road, Milford

62 56 0 0.76

More vulnerable

Exception test required. Could pass the test provided that the majority of development takes place within the part of the site within Zone 1 and 2.

773 Craven House, Godalming

64.1 61.8 0 7 0.21 More

vulnerable

Exception test required. Could pass the test provided that the majority of development takes place within the area of the site which is not at risk from reservoir flooding and not at risk of fluvial flooding according to the Lower Wey models.

874 Elmbridge Road, Cranleigh

43.4 21.1 9 60 3.7

More vulnerable

Exception test required. Could pass the Exception Test provided that the majority of development takes place within the part of the site within Zones 1 and 2 and not at risk of fluvial flooding.

16 Weyburn Works, Shackleford Road, Elstead

33.8 30.9 28.3 70 15.41

More vulnerable

Exception test required. Could pass the Exception Test provided that the majority of development takes place within the part of the site within Zones 1


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Size of site (ha.)


Compatible?

and 2.

383 Land at St. Nicolas Church of England Primary School, Cranleigh

63.1 61.7 59.9 67 1.37 More

vulnerable

Exception test required. Could pass the Exception Test provided that the majority of development is prioritised to take place within the part of the site within Zones 1 and 2, the new development does not increase the footprint of the existing development and the new development reduces risk overall.

10 Dunsfold Park, Cranleigh

1.2 0.7 0 2600 245

More vulnerable


292 West Cranleigh Nurseries, Knowle Lane

15.0 4.7 2.5 265 38.07

More vulnerable


853 Land at Little Meadow, Cranleigh

3.8 0 0 75 3.6 More

vulnerable Yes.


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5. Strategic Flood Risk Assessment

Fluvial flood risk, surface water/sewer flood risk and flood risk from artificial sources were appraised at

each site. To help summarise the risk across all sources, categories were used, as defined in

Table 5-1.

Table 5-1 Flood Risk Categories by Flood Type Very high High Medium Low

Fluvial (Flood Zones (FZ))

>35% in FZ3b >35% in FZ3a >50% in FZ2 >50% in FZ1

Fluvial (Detailed Modelling)

>35% at risk of 1 in 20yr RP event



>50% not at risk from 1 in 100yr RP event or greater

Surface Water/Sewer




>50% not at risk from 1 in 1000yr RP event or greater

Artificial Sources

>75% max reservoir or canal outline

50%<>75% max reservoir or canal outline

25%<>50% max reservoir or canal outline

<25% max reservoir or canal outline

Note that fluvial flooding has been assessed twice, where possible. The first assessment considers

the Environment Agency Flood Zones which represent an undefended scenario. These Flood Zones

are updated periodically by the Environment Agency. The second assessment considers more

detailed hydraulic modelling, where it is available. Where there are disparities, the results from the

detailed modelling supersedes the Flood Zone outlines.

Each site was then allocated a flood risk suitability score based upon the levels of flood risk on site, as

outlined in Table 5-1.

Figure 5-1: Flood Risk Suitability Assessment Criteria

Score Criteria

1 Flood Zone 3b or equivalent* in over 50% of the site

2 Flood Zone 3 or equivalent* in over 35% of the site or: Medium or high risk of surface water flooding and reservoir flooding in the majority of the site.

3 Flood Zone 3 or equivalent* in any part of the site or: Medium risk of flooding from any source

4 Over 50% of the site is at low risk of flooding from all sources

5 100% of the site is entirely at low risk of flooding from all sources

*where Flood Zone information has been superseded by detailed flood modelling, flood model outlines are used. Each site assessment have been provided as separate documents.


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6. Flood Risk Assessment Summary

Each site was allocated a flood risk suitability score based upon the approach described in section 1.

The summary of the flood risk assessment is outlined below.

Table 6-1: Summary of Flood Suitability Scores

ID Address Fluvial (Flood Zones)

Fluvial (Detailed Modelling)

Surface Water/ Sewer

Artificial Sources

Flood risk suitability score

Score driver

25 West of Badshot Lea

Low Low Low Low 4 Low risk

285 The Bush Hotel, The Borough, Farnham

Medium Medium Low Low 3 FZ2 in most of the site.

29 Coxbridge Farm, Alton Road, Farnham

Low Not available

Low Low 4 Low risk

245 5 - 21 Wey Hill, Haslemere

Low Not available

Low Low 3 0.02ha in FZ3a

141 West Street, Haslemere

Low Not available

Low Low 3 NW of site at risk of surface water and fluvial flooding

450 Opposite Milford Golf Club, Witley

Low Not available

Low Medium 3 1.77 ha in FZ3a

264 Victoria House, South Street, Farnham

Medium Not available

Low Low 3 FZ2 in most of the site.

94 Land behind Church Road, Milford

High Not available

Low Very High

3 Part of the site at risk of fluvial flooding.

773 Craven House, Godalming

High Low Medium High 2 Majority of site at risk of the 1 in 1000yr surface water event. Max reservoir outline is


22

>50% of site.

874 Elmbridge Road, Cranleigh

Low Low Low Low 3 North and west of the site is at risk of surface water flooding and fluvial flooding


Low Not available

Low Medium 3 28% is in FZ3b

383 Land at St. Nicolas Church of England Primary School, Cranleigh

Very High

Very High Low Low 1 59.5% is in FZ3a

10 Dunsfold Park, Cranleigh


292 West Cranleigh Nurseries, Knowle Lane


853 Land at Little Meadow, Cranleigh



23

7. Reducing flood risk on site

Flood risk recommendations were provided within each site assessment. In this chapter, these mitigation and adaptation recommendations are explored in more detail.

7.1 SuDS Techniques

Techniques available to manage the quantity of surface water typically operate in combination or

solely on the basis of the following two main principles:

Infiltration

Attenuation

The effectiveness of techniques in achieving the goals of attenuating discharges, reducing pollution

and providing amenity benefit will depend on a number of other factors such as filtration, settlement

and oxidation.

The SuDS Manual (C697)4 provides a summary of SuDS techniques and their suitability to meet the

three goals of sustainable drainage systems (water quantity, water quality and amenity biodiversity)

and their suitability within the stages of the ‘Management Train’. Table 7-1 presents a summary of a

variety of SuDS techniques along with their suitability in achieving the goals of sustainability.

4 CIRIA, The SUDS Manual (C697), March 2007

Waverley Level 2 SFRA April 2016

24

Table 7-1 – Summary of SuDS Techniques and their suitability to meet the three goals of sustainable drainage systems Management Train

SuDS Technique Description SuDS Principle

Water Quantity

Water Quality

Amenity Biodiversity

So

urc

e

Pre

ve

ntio

n Green roofs

Layer of vegetation or gravel on roof areas providing

absorption and storage. Attenuation ● ● ●

Rainwater harvesting

Capturing and reusing rainwater for domestic or irrigation

uses. Attenuation ● ○ ○

Permeable pavements Infiltration through the surface into underlying layer. Infiltration ● ● ○

Filter drains

Drain filled with permeable material with a perforated pipe

along the base. Infiltration ● ● X

Infiltration trenches

Similar to filter drains but allows infiltration through sides and

base. Infiltration ● ● X

Soakaway Underground structure used for store and infiltration. Attenuation ● ● X

Bio-retention areas

Vegetated areas used for treating runoff prior to discharge

into receiving water or infiltration Attenuation ● ● ●

Site

Swales

Grassed depressions, provides temporary storage,

conveyance, treatment and possibly infiltration. Attenuation ● ● ○

Sand filters

Provides treatment by filtering runoff through a filter media

consisting of sand. Infiltration ● ● X

Reg

iona

l

Basins

Dry depressions outside of storm periods, provides temporary

attenuation, treatment and possibly infiltration. Attenuation ● ● ○

Ponds

Designed to accommodate water at all times, provides

attenuation, treatment and enhances site amenity value. Attenuation ● ● ●

Wetlands

Similar to ponds, but are designed to provide continuous flow

through vegetation. Attenuation ● ● ●

Key: ● – highly suitable, ○ - suitable depending on design, X – unsuitable

Waverley Level 2 SFRA August 2016

25

7.2 Design of SuDS techniques

Detailed guidance for the design of SuDS, including specific guidance for individual techniques, is

available in the CIRIA SuDS Manual C697, the associated document ‘Site Handbook for the

Construction of SuDS’, C698 (Woods Ballard et al, 2007a) and the ‘Non-Statutory Technical

Standards for Sustainable Drainage’ (LASOO, 2015). These publications provide best practice

guidance on the planning, design, construction, operation and maintenance of SuDS to ensure

effective implementation within developments.

The design of SuDS measures must be undertaken as part of a drainage strategy and design for a

development site. A ground investigation should form part of the SuDS assessment to determine

ground conditions and the most appropriate technique(s). Hydrological analysis should be

undertaken using industry approved procedures to ensure an appropriate design is developed.

This should account for the effects of climate change over the lifetime of the proposed

system/development and based on an agreed permitted rate of discharge from the site.

During the design process, liaison should take place with the authority responsible for the receiving

water body and any organisations involved in the long term maintenance of the system. This may

include liaison with WBC, the EA and Thames Water, and which should focus on establishing a

suitable design methodology, any restrictions and provision for the long-term maintenance of the

SuDS system.

7.3 Incorporating SuDS into a site plan

The flexibility of SuDS to be placed throughout a site, to meet a variety of criteria and be integrated

within the urban fabric, means that it is suitable for a wide range of land use types, site

topographies and geology. Often a successful SuDS solution will utilise a number of techniques in

combination, providing flood risk, pollution and landscape/wildlife benefits to the site and

surrounding area. This section provides some guidance on how to incorporate SuDS techniques as

part of the master planning and outline planning stages. It has been adapted from C687 ‘Planning

for SuDS’.

7.6.1 Examine site topography and geology During this stage, the existing site topography should be characterised to determine natural flow

paths. Bedrock and superficial geology can be used as an initial tool to determine locations where

SuDS techniques should be located to maximize their infiltration potential. More in-depth analysis

of soil conditions, including borehole testing and soakage testing are required to confirm the

suitability of SuDS techniques and their ideal placement upon the site.

7.6.2 Create a spatial framework for SuDS The next step in the planning process is to develop an estimate of impermeable (paved roads,

paths and buildings) and permeable surface across the site. This information is used to assess pre-

and post-development runoff rates and volume, from which attenuation storage/infiltration targets

can be set. The number, type(s) and size of SuDS practices can then be determined as part of the

surface water management scheme at the site.

7.6.3 Look for multi-functional spaces Areas of the site where SuDS practices could be integrated within the urban fabric should be

sought, for instance locating SuDS in planned green space, within a play area.


26

7.6.4 Integrate the street network with SuDS The street network is one of the most important areas to incorporate SuDS. Swales can be located

along the road network to accept street runoff, tree planters can be configured to accept runoff from

roads and car parks and the use of rain gardens and bio-retention techniques can be used to

create ‘green streets’ that improve the amenity of a property. Large below-ground

storage/infiltration practices can also be located beneath the street network or car parks. Pervious

pavement materials are ideal for car parks and parking lay-bys.

A common concern with incorporating SuDS in developments is the belief that all SuDS are ‘land

hungry’ and significantly impact on the developable area of sites. By applying the principles

discussed above, SuDS can be integrated within the site using as little land as possible, whilst

creating multi-functional spaces that improve the amenity value, and hence enhance the property

value. In addition, SuDS can be employed on a strategic scale, for example with a number of sites

contributing to large scale jointly funded and managed SuDS, however, each development site

must offset its own increase in runoff; attenuation cannot be “traded” between developments.

7.7 SuDS Constraints

The underlying ground conditions of a development site will influence the type(s) of SuDS

technique suitable at an individual site. While this will need to be determined through ground

investigations carried out on-site, an initial assessment of the site’s suitability to the use of SuDS

can be obtained from a review of the available soils/geological survey of the area.

A band within the northwest of the borough is located on impermeable clay which is an unsuitable

geology for the use of infiltration based SuDS. In areas like these, sustainable drainage can be

achieved by the use of ponds, swales, wetlands and other such methods which do not rely on

infiltration into the ground. The northern part of the borough, around the Wey catchment is located

on sandstones of the Lower Greensand group, which is mostly indicated as being areas where

infiltration based methods may be appropriate. However, areas around Tilford, Churt and

Wrecclesham lie within a Source Protection Zone which may limit the use of infiltration based

SuDS. It is recommended that for all sites where infiltration drainage is proposed on site test are

carried out to determine specific infiltration rates.

It is recommended that developers should consult WBC, the EA, and relevant service authorities

and Utility Companies at the earliest stage of the development process to establish the best

solution for a particular site.

During the design process, in addition to considering the properties of the underlying soils and

strata it is necessary to also consider the sensitivity of the receiving water body and any previous

uses of the site.

The use of SuDS can be limited based on a number of constraints, which include:

Groundwater vulnerability and potential contamination of an aquifer;

Current or target water quality of a receiving watercourse;

The presence of groundwater Source Protection Zones and potential contamination of a potable water source;

Restrictions on infiltration on contaminated land to prevent the spread of contamination; and,

Restricted area on development sites where housing densities are high.

Should the development sites be included within the Local Plan housing allocation, Flood Risk Assessments and Drainage Strategies should consider these constraints and opportunities when designing SuDS on site.


27

8. Conclusion

This Level 2 Strategic Flood Risk Assessment considered 15 potential development sites based in

Flood Zones 2 and 3 (i.e. at medium or high risk from river flooding).

Sustainability scores were used to differentiate sites based upon the ease in which to manage flood

risk and avoid increasing flood risk. All developments in sites with scores of 4 can be designed

sustainably so that more vulnerable development can be placed within the safest areas with the

lowest flood risk. More work would be required at the drainage strategy stage to ensure that flood

risk could be managed on sites with scores of 3. Sites with scores of 1 or 2 have a considerable

part of the site in Flood Zone 3 (functional floodplain). These sites could only pass the exception

test, if either it was shown that redevelopment would reduce flood risk on site or if only flood

compatible development occurred which did not increase flood risk elsewhere.

Many of these sites could benefit from the flood alleviation and management work currently being

planned in the Wey catchment. The results of the River Wey flood risk management project

planning, optioneering and appraisal is due to be completed late in 2016/early 2017 and there is an

opportunity for development to contribute to plans through the Section 106 or Community

Infrastructure Levy process.

Despite this, there are often residual risks of river flooding (due to overtopping or breach) plus

surface water flooding risks. For new development to fully sustainable over their 100 year lifetime, it

is expected that they are designed in a way to ensure their safety.


28

11. References

Waverley Borough Council, LAA, (August 2016)

Surrey County Council Preliminary Flood Risk Assessment (June 2011)

Thames Catchment Flood Management Plan: Summary Report. Consultation EA, Bristol (December 2009)

Arun and Western Streams Catchment Flood Management Plan: Summary Report. EA, West Sussex (December 2009)

National Planning Policy Framework. Department for Communities and Local Government (March 2012)

Planning Practice Guidance: Flood Risk and Coastal Change. Department for Communities and Local Government (March 2014)

Waverley Multi Agency Flood Plan. WBC(November 2014)

Lower Wey Remodelling Flood Study Modelling Report. Mott MacDonald (December 2009)

River Blackwater Flood Study Final Flood Mapping report. Peter Brett Associates (August 2007)

River Wey Flood Mapping Study. Atkins (February, 2006)

Designing for Exceedance in Urban Drainage – good practice (C635). CIRIA (May 2006)

Planning for SuDS – making it happen (C687). CIRIA (December 2010)

The SUDS Manual (C697D). CIRIA (March 2007)

Site Handbook for the Construction of SuDS (C698D). CIRIA (February 2007)

Sustainable Drainage Systems. Hydraulic, structural and water quality advice (C609). CIRIA (May 2004)

Guidance on the Permeable Surfacing of Front Gardens. Department for Communities and Local Government (May 2009)

Promoting Sustainable Drainage Systems: Design Guidance for Islington. Robert Bray Associates Ltd, Islington Borough (March 2012)

Sustainable Drainage Systems (SuDS) – an introduction. EA (May 2003)


29

12. Glossary and Notation

Term Definition

Annual Exceedance Probability (AEP)

The probability of an event occurring within any one given year.

Attenuation In the context of this report - the storing of water to reduce peak discharge of water

Breach An opening – For example in the sea defences

Catchment Flood Management Plan

A high-level planning strategy through which the EA works with their key decision makers within a river catchment to identify and agree policies to secure the long-term sustainable management of flood risk.

Culvert/culverted A channel or pipe that carries water below the level of the ground.

EA Flood Zone 1 Low probability of flooding

EA Flood Zone 2 Medium probability of flooding. Probability of fluvial flooding is 0.1 – 1%. Probability of tidal flooding is 0.1 – 0.5 %

EA Flood Zone 3a High probability of flooding. Probability of fluvial flooding is 1% (1 in 100 years) or greater. Probability of tidal flooding is 0.5%(1 in 200 years)

EA Flood Zone 3b Functional floodplain

Estuary A tidal basin , where a river meets the sea, characterised by wide inlets

Exception Test

To pass the Exception Test, it must be shown that new development

located in areas at risk of flooding satisfactorily manages flood risk to

people and property. It must be demonstrated that development can

provide wider sustainability benefits to the community that outweigh flood

risk and that the development will be safe from flood risk in its lifetime.

Furthermore, the development must not increase flood risk elsewhere or

where possible, the development should reduce flood risk overall.

Flood defence Infrastructure used to protect an area against floods as floodwalls and embankments; they are designed to a specific standard of protection (design standard).

Floodplain Area adjacent to river, coast or estuary that is naturally at risk of flooding.

Flood Resilience Strategies aimed at flood protection, usually at the property level

Flood Risk The level of flood risk is the product of the frequency or likelihood of the flood incidents and their consequences (such as loss, damage, harm, distress and disruption)

Flood Risk Assessment

Considerations of the flood risks inherent in a project, leading to the development actions to control, mitigate or accept them.

Flood storage A temporary area that stores excess runoff or river flow often ponds or reservoirs.

Flood Zone The extent of how far flood waters are expected to reach.

Fluvial Relating to the actions, processes and behaviour of a water course (river or stream)

Fluvial flooding Flooding by a river or a watercourse.

Functional Floodplain

Land where water has to flow or be stored in times of flood.

GIS Geographic Information System – A mapping system that uses computers to store, manipulate, analyse and display data

Greenfield Previously undeveloped land.

Groundwater Water that is in the ground, this is usually referring to water in the saturated zone below the water table.

Highly Vulnerable Developments that are at highest risk of flooding.


30

Term Definition

Developments

Hydraulic Modelling A computerised model of a watercourse and floodplain to simulate water flows in rivers too estimate water levels and flood extents.

Infrastructure Physical structures that form the foundation for development.

Local Plan Waverley’s statutory development plan, comprising Part 1 (Strategic Policies and Sites) and Part 2 (Development Management and Site Allocations).

Local Planning Authority

The local authority or council empowered by law to exercise statutory planning functions for its administrative area.

Main River Watercourse defined on a ‘Main River Map’ designated by DEFRA. The EA has permissive powers to carry out flood defence works, maintenance and operational activities for Main Rivers only

Mitigation measure An element of development design which may be used to manage flood risk or avoid an increase in flood risk elsewhere.

Overland Flow Flooding caused when intense rainfall exceeds the capacity of the drainage systems or when, during prolonged periods of wet weather, the soil is so saturated such that it cannot accept any more water.

Overtopping Water carried over the top of a defence structure due to the wave height exceeding the crest height of the defence.

Residual Flood Risk The remaining flood risk after risk reduction measures have been taken into account.

Return Period The average time period between rainfall or flood incidents with the same intensity and effect.

Riparian Owner Owners of land adjoining, above, or with a watercourse running through it. Riparian owners have rights and responsibilities associated with river management.

Risk The probability or likelihood of an incident occurring.

River Catchment The areas drained by a river

Sequential Test To pass the Sequential Test, a Local Authority must demonstrate that they steered development to areas of lowest flood risk.

Sewer flooding Flooding caused by a blockage or overflowing in a sewer or urban drainage system.

Standard of Protection

The flood event return period above which significant damage and possible failure of the flood defences could occur.

Storm surge A high rise in sea level due to the winds of the storm and low atmospheric pressure.

Sustainability To preserve /maintain a state or process for future generations.

Sustainable drainage system

Methods of management practices and control structures that are designed to drain surface water in a more sustainable manner than some conventional techniques.

Sustainable development

Development that meets the needs of the present without compromising the ability of future generations meeting their own needs

Tidal Relating to the actions or processes caused by tides.

1 in 100 year annual chance fluvial/pluvial flood scenario

The annual chance that a 1 in 100 year fluvial or pluvial flood scenario will occur. Also expressed as a flood incident, which has a 1% probability of occurring in any one year.

1 in 100 year design standard

Flood defence that is designed for a flood scenario, which has an annual probability of 1%. In flood scenarios more severe than this the defence would be expected to fail or to allow flooding.


31

Appendix A – Flood Risk Datasets

Flood risk information was provided by Waverley Borough Council, Surrey County Council and the

EA in the form of flood incident databases, flood outlines and hydraulic models. The following table

outlines the data used in the preparation of this SFRA2.

Table A-1 Flood risk datasets

Data Description Owner / Author

Upper Wey Modelling Study

Study undertaken by Atkins for the EA in 2006. Model outlines for the 20%, 5%, 1% and 1%+CC AEP flood scenarios.

EA

Lower Wey Modelling Study

Study undertaken by Mott Macdonald for the EA in 2009. Model outlines for the 20%, 5%, 2%, 1% 1%+CC and 0.1% AEP flood scenarios.

EA

River Blackwater Flood Risk Mapping Study

Study undertaken by JBA for the EA. Model outlines for the 20%, 1% and 1%+CC AEP flood scenarios.

EA

Waverley Infrastructure Resilience Group – Winter Readiness 2014-2015

Multi Agency response report to capture lessons learned from winter 2013-2014 weather events.

EA

Historic Flood Data GIS outlines showing recorded outlines and updated Historic Flood Map.

EA

Flood Risk and Flood Alert Areas

GIS outlines showing the EA flood alert and flood warning areas covering WBC

EA

Statutory Main Rivers Watercourses layer – line data only at 1:10000 scale EA

Detailed River Network Watercourses layer – line data only at 1:10000 scale EA

Risk of Flooding from Reservoirs Information

GIS layer showing the areas at risk of flooding from Reservoirs

EA

Flood Map Flood Zone 2, Flood Zone 3, Defences, Areas Benefitting From Defences.

EA

Updated Flood Map for Surface Water

Second generation flood map for surface water generated from a digital terrain model.

EA

Historic Flood Incident Database

List of identified wetspots within WBC (for public use) Surrey County Council

Historical Flood Records

Wetspot database identifying areas reported to flood along roads within the Borough.

Surrey County Council

Multi Agency Flood Plan (draft)

Report outlining areas at risk of flooding and how responses should be managed.

Waverley Borough Council

Thames Catchment Flood Management Plan

Composed by the EA in December 2009, outlines flood risk management across the West Thames catchment EA

Wey and Arun Streams Catchment Flood Management Plan

Composed by the EA in December 2009, outlines flood risk management across the Wey and Arun catchments EA

Preliminary Flood Risk Assessment

Composed by Surrey County Council, June 2011 Downloaded from Internet

Sewer Flooding Information

DG5 extract for Waverley Borough council Thames Water

Information on the Wey and Arun Canal

Correspondence on Historic Flood incidents Wey and Arun Canal Trust

Mapping The 2009 OS Mapping (50k and 250k) was re-used under a new licence (2014) from the Ordnance Survey.

Waverley Borough Council

Flood Risk from GIS layer showing areas at risk of groundwater flooding British Geological


32

Groundwater Information

Society

Detailed SuDS suitability Map

GIS layer containing detailed information surrounding ground suitability for sustainable drainage systems.

British Geological Society

Reports of historic flood incidents

Email correspondence for the Waverley Parish Councils detailing reported flood incidents

Busbridge, Chiddingfold, Elstead, Ewhurst and Ellens Green, Hambledon. Witley


33

Appendix B – Planning Process

The planning process is derived from Planning Practice Guidance (DCLG, 2014). This Level 2

SFRA feeds into the stage circled below; it recommends flood risk considerations and provides

guidance on the flood risk management of each site allocation. This information will feed into the

Sustainability Appraisal Report for the Local Plan.

Figure B-1 Taking flood risk into account in the preparation of a Local Plan (DCLG, 2014)


34

Appendix C - Absolute Ranking of LAA sites by Flood Risk


35

Rank LAA ref.

Location / Address Proposed

use

% overlap Zone 2

% overlap Zone 3a

% overlap Zone 3b

(functional floodplain)

Surface water:

% overlap

1 in 1000 year

event

Surface water:

% overlap 1 in 100

year event

Surface water:

% overlap 1 in 30 year

event

Ground Water

Susceptibility5

EA Flood Zone 1

1

392 Linden Farm, Rosemary Lane, Alfold Housing 0 0 0 0 0 0 0

614 West of Loxwood Road, Alfold Housing 0 0 0 0 0 0 0

767 Wellingtons, 16 Folly Hill, Farnham Housing 0 0 0 0 0 0 0

2

380 Stephensons Engineering, Wrecclesham Hill, Farnham*

Housing 0 0 0 0 0 0 [1]

652 Off Chestnut Way, Bramley Housing 0 0 0 0 0 0 [1]

665 South of Wood Farm, Portsmouth Road, Milford Housing 0 0 0 0 0 0 [1]

682 West Down, Portsmouth Road, Hindhead Housing 0 0 0 0 0 0 [1]

728 South of Brighton Road, Busbridge Housing 0 0 0 0 0 0 [1]

880 Exchange House, Hindhead Road, Hindhead Housing 0 0 0 0 0 0 [1]

366 West of George Eliot Close, Witley Housing 0 0 0 0 0 0 [1]

651 West of Scizdons Climb, Godalming Housing 0 0 0 0 0 0 [1]

706 Rear of 46-48 Peper Harow Road, Godalming Housing 0 0 0 0 0 0 [1]

779 Old Fire Station, Queen Street, Godalming Housing 0 0 0 0 0 0 [1]

5 0 = none, [1] = clearwater, [2] = clearwater and superficial deposits, [3] = superficial deposits.


36

794 The Meath, Westbrook Road, Godalming Housing 0 0 0 0 0 0 [1]

856 Barrow Hills School, Witley Housing 0 0 0 0 0 0 [1]

2 915 Catteshall Manor, Catteshall Lane, Godalming Housing 0 0 0 0 0 0 [1]

3

449 Manor Lodge, Milford Housing 0 0 0 0 0 0 [2]

557 Brownscombe House, Hindhead Road, Haslemere

Housing 0 0 0 0 0 0 [2]

661 The Brambles, Mark Way, Godalming Housing 0 0 0 0 0 0 [2]

674 South east of Water Treatment Works, Haslemere Housing 0 0 0 0 0 0 [2]

676 South of Franklin Court, Brook Road, Wormley Housing 0 0 0 0 0 0 [2]

677 Off Bridewell Close, Wormley Housing 0 0 0 0 0 0 [2]

714 Woodside Park, Haslemere Housing 0 0 0 0 0 0 [2]

299 Shoppe Hill, Dunsfold Housing 0 0 0 0 0 0 [2]

561 East of Petworth Road and south of Mill Lane, Witley

Housing 0 0 0 0 0 0 [2]

658 Alehouse Field, The Common, Dunsfold Housing 0 0 0 0 0 0 [2]

56 Llanaway Works, Meadrow, Godalming Housing 0 0 0 0 0 0 [2]

57 1 - 22 Catteshall Lane, Godalming Housing 0 0 0 0 0 0 [2]

281 25 - 27 Hurlands Close, Farnham* Housing 0 0 0 0 0 0 [2]

908 Hambledon House, Vann Lane, Hambledon Housing 0 0 0 0 0 0 [2]

914 Gorse Hill, Petworth Road, Wormley Housing 0 0 0 0 0 0 [2]

4

712 Highfold, Horsham Road, Cranleigh Housing 0 0 0 0 0 0 [3]

398 South of Cranleigh Road, Ewhurst Housing 0 0 0 0 0 0 [3]

654 Hill Fields, Gardeners Hill Road, Farnham Housing 0 0 0 0 0 0 [3]

671 Rear of 12 Heathyfields Road, Farnham Housing 0 0 0 0 0 0 [3]


37

5 912 Witley & District Social Club, Mill Lane, Witley Housing 0 0 0 0.02 0 0 [2]

6 13 47 - 53 Horsham Road, Cranleigh Housing 0 0 0 0.02 0 0 [3]

7 687 Alfold Farm Barn and Bungalow, Alfold Housing 0 0 0 0.04 0 0 0

8 833 Mill Lane, Dunsfold Housing 0 0 0 0.06 0 0 [3]

9 640 West of High Street, Bramley Housing 0 0 0 0.26 0 0 [1]

10 443 Franklyn Road, Godalming Housing 0 0 0 0.40 0 0 0

11 851 Between Halfway Lane and Eashing Lane, Godalming

Housing 0 0 0 0.44 0 0 [1]

12 904 Hurstford Stables, Dunsfold Housing 0 0 0 0.44 0 0 [3]

13 788 East of Dunsfold Housing 0 0 0 0.76 0 0 [2]

14 726 Barcroft, Barhatch Road, Cranleigh Housing 0 0 0 1.09 0 0 [3]

15 702 Hewitt Copse, Land South of Haslemere Road, Witley

Housing 0 0 0 1.20 0 0 [2]

16 145 Oakdale, Portsmouth Road, Hindhead Housing 0 0 0 1.40 0 0 [1]

17 467 Highcroft, Petworth Road, Witley Housing 0 0 0 1.63 0 0 [2]

18 655 Wrecclesham Farm Buildings, Echo Barn Lane, Farnham

Housing 0 0 0 2.26 0 0 [1]

19 656 Wrecclesham Farm Nursery, Echo Barn Lane, Farnham

Housing 0 0 0 2.61 0 0 [1]

20 653 Lower Paddock Gardeners Hill Road, Farnham Housing 0 0 0 2.79 0 0 [3]

21 132 R/o 6 The Street, Wrecclesham Housing 0 0 0 2.89 0 0 [2]

22 703 Coneycroft, Guildford and Godalming By-Pass, Milford

Housing 0 0 0 3.33 0 0 [2]

23 709 Great Tangley, Manor Farm, Wonersh Housing 0 0 0 3.58 0 0 [2]

24 791 Smithbrook Kilns, Cranleigh Housing 0 0 0 3.74 0 0 [3]

25 641 Roe Deer Farm, Portsmouth Road, Milford Housing 0 0 0 4.37 0 0 [1]


38

26 574 East of Loxwood Road, Alfold Housing 0 0 0 4.54 0 0 [3]

27 619 Farnham College Tennis Courts, east of Firgrove Hill

Housing 0 0 0 5.43 0 0 [2]

28 905 East of Guildford Road, Cranleigh Housing 0 0 0 6.04 0 0 [3]

29 280 R/o Orchard Cottages and Glenafrie, Mill Lane, Bramley

Housing 0 0 0 6.17 0 0 [1]

30 828 Foxdene and Southwall, Charterhouse Road, Godalming

Housing 0 0 0 6.36 0 0 [1]

31 895 Bunchfield, Fisher Lane, Chiddingfold Housing 0 0 0 6.70 0 0 [1]

32 470 Chilton Close (r/o The Willows), Alfold Housing 0 0 0 7.57 0 0 0

33 130 Cranleigh Infants School, Church Lane, Cranleigh Housing 0 0 0 8.58 0 0 [3]

34 916 Fmr. Batemans Labs., Catteshall Lane, Godalming

Housing 0 0 0 8.92 0 0 [1]

35 648 Woodside Park, Godalming Mixed 0 0 0 9.47 0 0 [1]

36 672 Rear of Sandford, Petworth Road, Witley Housing 0 0 0 9.80 0 0 [2]

37 727 Rear of Three Stiles Road, Farnham Housing 0 0 0 10.74 0 0 [2]

38 558 Ewhurst Brickworks, Horsham Road, Ewhurst Housing 0 0 0 11.81 0 0 [3]

39 49 Hillside Works, Catteshall Lane, Godalming Housing 0 0 0 17.11 0 0 [1]

40 900 Land off Water Lane Employme

nt 0 0 0 24.46 0.01 0 [2]

41 716 13 Upper Old Park Lane, Farnham Mixed 0 0 0 0.34 0.03 0 [3]

42 9 Hewitts Industrial Estate, Cranleigh Housing 0 0 0 8.41 0.04 0 [3]

43 295 Gleneagles, Rowly Drive, Rowly Housing 0 0 0 11.06 0.06 0 [3]

44 571 Land east of Binscombe Housing 0 0 0 0.20 0.08 0 [3]

45 381 South of Badshot Lea Housing 0 0 0 0.50 0.08 0 [2]

46 133 R/o Viners Mead, Wrecclesham Road, Farnham Housing 0 0 0 6.10 0.08 0 [2]


39

47 589 Charles Hill Nursery, The Lodge, Tilford Housing 0 0 0 1.87 0.11 0 [3]

48 495 Police Station, 46 West Street, Haslemere Housing 0 0 0 9.00 0.14 0 [2]

49 875 Old Elstead Road, Milford Housing 0 0 0 1.97 0.31 0 [2]

50 308 Rear of The Croft, Elstead Housing 0 0 0 1.87 0.41 0 [2]

51 144 London Road, Hindhead Housing 0 0 0 6.18 1.29 0 [1]

52 399 Backward Point, Cranleigh Road, Ewhurst Housing 0 0 0 5.66 1.33 0 [3]

53 894 R/o United Reformed Church, The Common, Wonersh

Housing 0 0 0 1.86 1.75 0 [1]

54 551 Unit 1-4 East Street (Site B), Farnham Housing 0 0 0 4.70 1.96 0 [2]

55 681 Chapman House, Meadway, Haslemere Housing 0 0 0 8.50 3.36 0 [2]

56 857 Brockhurst Farm, Dunsfold Road, Alfold Crossways

Housing 0 0 0 13.29 5.55 0 [3]

57 882 2-3 The Borough, Farnham* Housing 0 0 0 19.82 8.53 0 [2]

58 66 Charterhouse School, Peperharow Road, Godalming

Housing 0 0 0 20.61 9.47 0 [1]

59 769 Bramley Garage, High Street, Bramley Housing 0 0 0 2.68 0.02 0.01 [1]

60 277 Adj. Brockhurst Farm, Dunsfold Road, Alfold Crossways

Housing 0 0 0 2.72 0.07 0.02 [3]

61 898 Green Lane, Badshot Lea Housing 0 0 0 99.30 85.80 0.02 [2]

62 657 South of Monkton Lane, Farnham Housing 0 0 0 14.99 1.65 0.03 [2]

63 478 Part of SSE Depot, Lower Weybourne Lane, Farnham

Housing 0 0 0 78.62 4.89 0.04 [2]

64 556 Between Hale Road and Guildford Road, Farnham

Housing 0 0 0 12.07 0.06 0.05 [2]

65 550 1-9 Romans Business Park (Site A), Farnham Housing 0 0 0 15.45 2.72 0.05 [2]

66 352 Land at Woolmer Hill, Woolmer Hill Road,

Haslemere

Housing 0 0 0 3.30 1.24 0.11 [2]


40

67 472 Alfold Garden Centre, Alfold Crossways Housing 0 0 0 4.31 0.68 0.13 [3]

68 346 South of Chestnut Way, Busbridge Housing 0 0 0 0.83 0.46 0.24 [1]

69 711 Loxwood Road, Springbok Estate, Alfold Housing 0 0 0 42.33 4.60 0.27 [3]

70 364 Moushill Mead, Portsmouth Road, Milford Housing 0 0 0 4.58 1.22 0.34 [2]

71 824 Four Trees, Hookley Lane, Elstead Housing 0 0 0 20.93 1.96 0.38 [2]

72 461 Rear of 48 Wrecclesham Hill, Farnham Housing 0 0 0 4.21 0.63 0.40 [1]

73 872 Little Acres Nursery, Badshot Lea Housing 0 0 0 6.65 0.57 0.47 [2]

74 688 Bowles Farm, Horsham Road, Cranleigh Housing 0 0 0 7.44 1.34 0.61 [3]

75 632 Barrow Hills School, Witley Housing 0 0 0 8.21 3.23 0.63 [2]

76 713 Garden Style, Wrecclesham Hill, Farnham* Housing 0 0 0 4.58 0.88 0.67 [1]

77 770 Knowle Livery, Old Park Lane, Farnham Housing 0 0 0 13.33 0.89 0.67 [2]

78 465 Weydown Industrial Estate (adjacent Haslemere station)

Housing 0 0 0 21.16 5.35 0.71 [2]

79 368 Wheeler Street Nurseries, Wheeler Lane, Witley Housing 0 0 0 6.72 1.12 0.80 [2]

80 902 Heath Farm, Heath Lane, Busbridge Housing 0 0 0 7.01 1.54 0.98 [1]

81 893 Brookfield, Horsham Road, Alfold Housing 0 0 0 47.74 1.08 1.00 [3]

82 400 North of Penlan, Cranleigh Road, Ewhurst Housing 0 0 0 15.57 5.48 1.02 [3]

83 620 Adjacent Ruffold Farm, Guildford Road, Cranleigh Housing 0 0 0 29.67 5.16 1.10 [3]

84 438 West of Green Lane, Badshot Lea Housing 0 0 0 39.53 4.78 1.15 [2]

85 881 The Old Hop Kiln, Long Garden Walk, Farnham Housing 0 0 0 2.84 1.21 1.21 [2]

86 633 Cramhurst Lane, Witley Housing 0 0 0 25.90 8.02 1.24 [2]

87 909 R/o Tamarisk, Mapledrakes Road, Ewhurst Housing 0 0 0 11.09 2.71 1.52 [3]

88 96 Garages off Nursery Hill, Wonersh Housing 0 0 0 14.74 4.09 1.63 0

89 294 Horsham Road, Cranleigh Housing 0 0 0 17.77 5.09 1.72 [3]


41

90 697 Wey Hill, Haslemere Housing 0 0 0 12.13 3.87 2.00 [2]

91 701 Lavender Lane, Farnham Housing 0 0 0 12.66 4.70 2.33 [3]

92 565 Land adjacent to Manfield Industrial Park,

Cranleigh

Employment

0 0 0 11.34 4.82 2.40 [3]

93 787 Between Ruffold Farm and Guildford Road, Cranleigh

Housing 0 0 0 41.15 12.11 3.23 [3]

94 209 Keys Cottage & Wedgewood, Holloway Hill, Godalming

Housing 0 0 0 21.49 7.20 3.24 [1]

95 286 Manor Lodge, Chiddingfold Housing 0 0 0 16.11 5.52 3.56 [3]

96 497 Cranleigh Brickworks, Baynards, Rudgwick Housing 0 0 0 17.72 6.60 3.57 0

97 865 Rear of The Croft, Woodside Road, Chiddingfold Housing 0 0 0 18.97 6.67 3.61 [3]

98 693 Hale Road, Farnham Housing 0 0 0 11.41 5.73 3.67 [2]

99 692 West of Sweeters Copse, Loxwood Road, Alfold X’ways*

Housing 0 0 0 23.65 7.11 3.81 0

100 452 Petworth Road, Witley Housing 0 0 0 22.29 9.07 4.39 [2]

101 402 South of Field View Close, Chiddingfold Housing 0 0 0 12.26 8.90 4.49 [3]

102 847 Adjacent to Petworth Road, Witley Housing 0 0 0 28.55 8.93 4.97 [2]

103 670 The Woolmead, Farnham Mixed 0 0 0 12.12 8.84 5.39 [2]

104 8 Notcutts, Guildford Road, Cranleigh Housing 0 0 0 35.06 12.44 5.73 [3]

105 293 Cranleigh Nurseries, Guildford Road, Rowly Housing 0 0 0 56.02 16.67 5.98 [3]

106 747 Adjacent Nugent Close, Dunsfold Housing 0 0 0 12.69 8.62 6.48 [2]

107 669 Homeleigh Nursery, Guildford Road, Cranleigh Housing 0 0 0 67.24 12.61 6.57 [3]

108 848 Between Dunsfold Road and Loxwood Road, Alfold

Housing 0 0 0 35.27 12.88 6.85 [3]

109 564 Century Farm, Green Lane, Badshot Lea Housing 0 0 0 71.03 28.74 7.47 [2]

110 136 35 - 42 East Street, Farnham Housing 0 0 0 15.42 9.96 8.25 [2]


42

111 871 Adjacent Petworth Road, Milford Housing 0 0 0 49.14 13.05 8.70 [2]

112 296 Ruffolds Farm, Guildford Road, Cranleigh Housing 0 0 0 58.49 24.99 9.16 [3]

113 448 Rear of 10 & 11 Busdens Close, Milford Housing 0 0 0 25.30 17.75 9.27 [2]

114 840 The Old Stick Factory, Fisher Lane, Chiddingfold Housing 0 0 0 64.83 18.79 9.40 0

115 694 Smokejacks, Horsham Road, Ewhurst Housing 0 0 0 29.96 15.98 14.42 [3]

116 862 West Street (Harts Yard), Farnham Housing 0 0 0 38.28 23.15 16.79 [2]

117 275 Adjacent Wildwood Golf Club, Horsham Road, Alfold

Housing 0 0 0 40.24 30.28 21.72 [3]

118 276 Adjoining Chilton Close, Alfold Crossways Housing 0 0 0 45.25 27.79 22.54 0

EA Flood Zone 2

119 25 West of Badshot Lea Housing 5.99 0 0 24.05 5.73 1.66 [2]

120 285 The Bush Hotel, The Borough, Farnham Housing 98.39 0 0 7.88 0 0 [2]

121 27 East of Badshot Lea Housing 100 0 0 38.35 17.40 0.60 [2]

EA Flood Zone 3

122 643 Busdens Lane, Milford Housing 2.15 0.08 0 21.91 11.91 3.72 [2]

123 696 South of Frensham Vale Road, Farnham Housing 0.33 0.31 0 2.87 0.90 0.49 [3]

124 333 35 Frensham Vale, Lower Bourne, Farnham Housing 0.58 0.54 0 0.74 0.53 0.43 0

125 10 Dunsfold Aerodrome Mixed 1.80 0.61 0 27.98 9.33 5.66 [3]

126 29 Coxbridge Farm, Alton Road, Farnham Housing 2.23 1.85 0 4.31 1.45 1.06 [2]

127 365 Hurst Gate, Portsmouth Road, Milford Housing 4.69 4.13 0 0.98 0.45 0 [1]

128 80 Concours Peugeot, Sturt Road, Haslemere Housing 4.33 4.33 0 26.14 3.79 2.25 [2]

129 644 Cedar House, Byworth Road, Farnham Housing 5.58 4.99 0 25.74 16.82 13.90 [2]

130 245 5 - 21 Weyhill, Haslemere Housing 8.03 7.20 0 3.31 0.70 0.06 [2]


43

131 141 West Street (including Key Site), Haslemere Housing 7.38 7.38 0 18.21 9.76 4.23 [2]

132 450 Opposite Milford Golf Club, Milford Housing 12.95 10.75 0 11.23 3.91 1.06 [2]

133 615 East of Low Lane, Badshot Lea Housing 100 13.10 0 35.60 3.57 1.66 [2]

134 772 Westbrook Mills, Borough Road, Godalming Housing 100 15.91 0 0 0 0 [1]

135 264 Victoria House, South Street, Farnham Housing 100 20.52 0 28.46 0.25 0 [2]

136 679 30 Frensham Vale, Lower Bourne, Farnham Housing 25.83 22.14 0 30.99 21.16 11.35 [1]

137 854 Low Lane, Badshot Lea Housing 100 36.64 0 40.90 0.06 0 [2]

138 94 Rear of 48-58 Church Road, Milford Housing 53.54 47.27 0 44.98 16.26 3.10 [2]

139 853 Little Meadow, Cranleigh* Housing 4.67 0.15 0.15 8.88 3.62 2.91 [3]

140 622 The Nursery, Gosden Common, Bramley Housing 7.91 2.35 1.50 16.55 4.98 0.49 [2]

141 292 West Cranleigh Nurseries, Knowle Lane, Cranleigh

Housing 20.37 7.43 2.70 25.46 9.72 4.59 [3]

142 567 Panda House/Riverview House, Catteshall Lane, Godalming

Housing 5.89 3.26 3.26 15.23 1.85 0.55 [2]

143 780 Panda House, Catteshall Lane, Godalming Housing 9.25 3.40 3.41 23.47 2.42 0 [2]

144 332 Waverley Lane, Farnham Housing 12.19 7.20 5.05 8.98 5.82 3.05 [1]

145 874 Elmbridge Road, Cranleigh Housing 43.45 21.12 8.98 16.59 0.66 0.18 [3]

146 11 Astra House, Cranleigh Housing 17.25 17.25 17.15 99.97 67.90 64.22 [3]

147 16 Weyburn Works, Shackleford Road, Elstead Housing 33.80 30.85 28.27 15.93 2.65 0.08 [2]

148 343 Stockwood Way, Hale, Farnham Housing 83.81 43.40 38.28 73.01 28.50 12.39 [3]

149 33 Service Station, Badshot Lea Road, Badshot Lea Housing 100 100 38.48 16.94 0 0 [2]

150 5 Astra House and adjacent The Common, Cranleigh

Housing 49.59 48.84 48.83 75.20 28.94 19.85 0

151 552 Jewsons, The Common, Cranleigh Housing 80.48 68.82 53.22 64.27 22.58 3.44 [3]

152 609 123a Badshot Lea Road, Badshot Lea Housing 100 96.51 55.95 11.74 0 0 [2]


44

153 383 Cranleigh C of E Primary School, Parsonage Road

Housing 62.98 61.67 59.90 11.11 1.48 0 [3]

154 52 Thames Water, Borough Road, Godalming Mixed 100 80.60 67.65 34.18 20.53 10.27 [1]

155 436 Preymead Farm Industrial Estate, Badshot Lea Road

Housing 100 97.16 94.28 45.43 0.94 0 [3]


45

Appendix D – LAA Site Rating (Green/Red) As of August 2016

Further details of why sites located wholly in Flood Zone 1 were rated ‘Red’ (unsuitable for the proposed development) and why sites wholly or partly in Flood Zones 2, 3a or 3b were rated ‘Green’ (suitable for the proposed development) can

be found in the Land Availability Assessment.


46

Rank LAA ref.


use

% overlap Zone 2

% overlap

Zone 3a

% overlap Zone 3b

(functional

floodplain)

Surface water:

% overlap

1 in 1000 year event

Surface water:

% overlap 1 in 100

year event

Surface water:

% overlap 1 in 30 year event

Ground Water

Susceptibility6

LAA Rating

EA Flood Zone 1

392 Linden Farm, Rosemary Lane, Alfold Housing 0 0 0 0 0 0 0 Red

1 614 West of Loxwood Road, Alfold Housing 0 0 0 0 0 0 0 Red

767 Wellingtons, 16 Folly Hill, Farnham Housing 0 0 0 0 0 0 0 Red

380 Stephensons Engineering, Wrecclesham Hill, Farnham *

Housing 0 0 0 0 0 0 [1] Green

652 Off Chestnut Way, Bramley Housing 0 0 0 0 0 0 [1] Red

2

665 South of Wood Farm, Portsmouth Road, Milford

Housing 0 0 0 0 0 0 [1] Red

682 West Down, Portsmouth Road, Hindhead Housing 0 0 0 0 0 0 [1] Green

728 South of Brighton Road, Busbridge Housing 0 0 0 0 0 0 [1] Red

880 Exchange House, Hindhead Road, Hindhead


366 West of George Eliot Close, Witley Housing 0 0 0 0 0 0 [1] Red

651 West of Scizdons Climb, Godalming Housing 0 0 0 0 0 0 [1] Red

706 Rear of 46-48 Peper Harow Road, Godalming


779 Old Fire Station, Queen Street, Godalming Housing 0 0 0 0 0 0 [1] Red

6 0 = none, [1] = clearwater, [2] = clearwater and superficial deposits, [3] = superficial deposits.


47

Rank LAA ref.


use

% overlap Zone 2

% overlap

Zone 3a

% overlap Zone 3b

(functional

floodplain)

Surface water:

% overlap


Surface water:

% overlap 1 in 100

year event

Surface water:


Ground Water

Susceptibility6

LAA Rating

794 The Meath, Westbrook Road, Godalming Housing 0 0 0 0 0 0 [1] Red

856 Barrow Hills School, Witley Housing 0 0 0 0 0 0 [1] Red

915 Catteshall Manor, Catteshall Lane, Godalming


449 Manor Lodge, Milford Housing 0 0 0 0 0 0 [2] Green

557 Brownscombe House, Hindhead Road, Haslemere


661 The Brambles, Mark Way, Godalming Housing 0 0 0 0 0 0 [2] Red

674 South east of Water Treatment Works, Haslemere


676 South of Franklin Court, Brook Road, Wormley


677 Off Bridewell Close, Wormley Housing 0 0 0 0 0 0 [2] Green

714 Woodside Park, Haslemere Housing 0 0 0 0 0 0 [2] Green

3 299 Shoppe Hill, Dunsfold Housing 0 0 0 0 0 0 [2] Red

561 East of Petworth Road and south of Mill Lane, Witley

Housing 0 0 0 0 0 0 [2] Red

658 Alehouse Field, The Common, Dunsfold Housing 0 0 0 0 0 0 [2] Red

56 Llanaway Works, Meadrow, Godalming Housing 0 0 0 0 0 0 [2] Red

57 1 - 22 Catteshall Lane, Godalming Housing 0 0 0 0 0 0 [2] Green

281 25 - 27 Hurlands Close, Farnham* Housing 0 0 0 0 0 0 [2] Green


48

Rank LAA ref.


use

% overlap Zone 2

% overlap

Zone 3a

% overlap Zone 3b

(functional

floodplain)

Surface water:

% overlap


Surface water:

% overlap 1 in 100

year event

Surface water:


Ground Water

Susceptibility6

LAA Rating

908 Hambledon House, Vann Lane, Hambledon Housing 0 0 0 0 0 0 [2] Red

914 Gorse Hill, Petworth Road, Wormley Housing 0 0 0 0 0 0 [2] Green

712 Highfold, Horsham Road, Cranleigh Housing 0 0 0 0 0 0 [3] Red

4

398 South of Cranleigh Road, Ewhurst Housing 0 0 0 0 0 0 [3] Green

654 Hill Fields, Gardeners Hill Road, Farnham Housing 0 0 0 0 0 0 [3] Red

671 Rear of 12 Heathyfields Road, Farnham Housing 0 0 0 0 0 0 [3] Red

5 912 Witley & District Social Club, Mill Lane, Witley

Housing 0 0 0 0.02 0 0 [2] Red

6 13 47 - 53 Horsham Road, Cranleigh Housing 0 0 0 0.02 0 0 [3] Green

7 687 Alfold Farm Barn and Bungalow, Alfold Housing 0 0 0 0.04 0 0 0 Red

833 Mill Lane, Dunsfold Housing 0 0 0 0.06 0 0 [3] Red

640 West of High Street, Bramley Housing 0 0 0 0.26 0 0 [1] Red

10 443 Franklyn Road, Godalming Housing 0 0 0 0.40 0 0 0 Red

851 Between Halfway and Eashing Lane, Godalming

Housing 0 0 0 0.44 0 0 [1] Red

904 Hurstford Stables, Dunsfold Housing 0 0 0 0.44 0 0 [3] Red

788 East of Dunsfold Housing 0 0 0 0.76 0 0 [2] Green

726 Barcroft, Barhatch Road, Cranleigh Housing 0 0 0 1.09 0 0 [3] Red

15 702 Hewitt Copse, Land South of Haslemere Road, Witley

Housing 0 0 0 1.20 0 0 [2] Red


49

Rank LAA ref.


use

% overlap Zone 2

% overlap

Zone 3a

% overlap Zone 3b

(functional

floodplain)

Surface water:

% overlap


Surface water:

% overlap 1 in 100

year event

Surface water:


Ground Water

Susceptibility6

LAA Rating

145 Oakdale, Portsmouth Road, Hindhead Housing 0 0 0 1.40 0 0 [1] Green

467 Highcroft, Petworth Road, Witley Housing 0 0 0 1.63 0 0 [2] Green

655 Wrecclesham Farm Buildings, Echo Barn Lane, Farnham

Housing 0 0 0 2.26 0 0 [1] Red

656 Wrecclesham Farm Nursery, Echo Barn Lane, Farnham

Housing 0 0 0 2.61 0 0 [1] Red

20 653 Lower Paddock Gardeners Hill Road, Farnham

Housing 0 0 0 2.79 0 0 [3] Red

132 R/o 6 The Street, Wrecclesham Housing 0 0 0 2.89 0 0 [2] Red

703 Coneycroft, Guildford and Godalming By-Pass, Milford

Housing 0 0 0 3.33 0 0 [2] Green

709 Great Tangley, Manor Farm, Wonersh Housing 0 0 0 3.58 0 0 [2] Red

791 Smithbrook Kilns, Cranleigh Housing 0 0 0 3.74 0 0 [3] Red

25 641 Roe Deer Farm, Portsmouth Road, Milford Housing 0 0 0 4.37 0 0 [1] Red

574 East of Loxwood Road, Alfold Housing 0 0 0 4.54 0 0 [3] Red

619 Farnham College Tennis Courts, east of Firgrove Hill

Housing 0 0 0 5.43 0 0 [2] Green

905 East of Guildford Road, Cranleigh Housing 0 0 0 6.04 0 0 [3] Red

280 R/o Orchard Cottages and Glenafrie, Mill Lane, Bramley

Housing 0 0 0 6.17 0 0 [1] Green

30 828 Foxdene and Southwall, Charterhouse Road, Godalming

Housing 0 0 0 6.36 0 0 [1] Green


50

Rank LAA ref.


use

% overlap Zone 2

% overlap

Zone 3a

% overlap Zone 3b

(functional

floodplain)

Surface water:

% overlap


Surface water:

% overlap 1 in 100

year event

Surface water:


Ground Water

Susceptibility6

LAA Rating

895 Bunchfield, Fisher Lane, Chiddingfold Housing 0 0 0 6.70 0 0 [1] Red

470 Chilton Close (r/o The Willows), Alfold Housing 0 0 0 7.57 0 0 0 Green

130 Cranleigh Infants School, Church Lane, Cranleigh

Housing 0 0 0 8.58 0 0 [3] Green

916 Fmr. Batemans Labs., Catteshall Lane, Godalming

Housing 0 0 0 8.92 0 0 [1] Red

35 648 Woodside Park, Godalming Mixed 0 0 0 9.47 0 0 [1] Green

672 Rear of Sandford, Petworth Road, Witley Housing 0 0 0 9.80 0 0 [2] Red

727 Rear of Three Stiles Road, Farnham Housing 0 0 0 10.74 0 0 [2] Green

558 Ewhurst Brickworks, Horsham Road, Ewhurst

Housing 0 0 0 11.81 0 0 [3] Red

49 Hillside Works, Catteshall Lane, Godalming Housing 0 0 0 17.11 0 0 [1] Red

40 900 Land off Water Lane Employment 0 0 0 24.46 0.01 0 [2] Green

716 13 Upper Old Park Lane, Farnham Mixed 0 0 0 0.34 0.03 0 [3] Red

9 Hewitts Industrial Estate, Cranleigh Housing 0 0 0 8.41 0.04 0 [3] Red

295 Gleneagles, Rowly Drive, Rowly Housing 0 0 0 11.06 0.06 0 [3] Red

571 Land east of Binscombe Housing 0 0 0 0.20 0.08 0 [3] Green

45 381 South of Badshot Lea Housing 0 0 0 0.50 0.08 0 [2] Red

133 R/o Viners Mead, Wrecclesham Road, Farnham

Housing 0 0 0 6.10 0.08 0 [2] Red


51

Rank LAA ref.


use

% overlap Zone 2

% overlap

Zone 3a

% overlap Zone 3b

(functional

floodplain)

Surface water:

% overlap


Surface water:

% overlap 1 in 100

year event

Surface water:


Ground Water

Susceptibility6

LAA Rating

589 Charles Hill Nursery, The Lodge, Tilford Housing 0 0 0 1.87 0.11 0 [3] Green

495 Police Station, 46 West Street, Haslemere Housing 0 0 0 9.00 0.14 0 [2] Green

875 Old Elstead Road, Milford Housing 0 0 0 1.97 0.31 0 [2] Green

50 308 Rear of The Croft, Elstead Housing 0 0 0 1.87 0.41 0 [2] Green

144 London Road, Hindhead Housing 0 0 0 6.18 1.29 0 [1] Green

399 Backward Point, Cranleigh Road, Ewhurst Housing 0 0 0 5.66 1.33 0 [3] Green

894 R/o United Reformed Church, The Common, Wonersh

Housing 0 0 0 1.86 1.75 0 [1] Red

551 Unit 1-4 East Street (Site B), Farnham Housing 0 0 0 4.70 1.96 0 [2] Red

55 681 Chapman House, Meadway, Haslemere Housing 0 0 0 8.50 3.36 0 [2] Red

857 Brockhurst Farm, Dunsfold Road, Alfold Crossways

Housing 0 0 0 13.29 5.55 0 [3] Green

882 2-3 The Borough, Farnham * Housing 0 0 0 19.82 8.53 0 [2] Green

66 Charterhouse School, Peperharow Road, Godalming

Housing 0 0 0 20.61 9.47 0 [1] Green

769 Bramley Garage, High Street, Bramley Housing 0 0 0 2.68 0.02 0.01 [1] Red

60 277 Adj. Brockhurst Farm, Dunsfold Road, Alfold Crossways

Housing 0 0 0 2.72 0.07 0.02 [3] Green

898 Green Lane, Badshot Lea Housing 0 0 0 99.30 85.80 0.02 [2] Red

657 South of Monkton Lane, Farnham Housing 0 0 0 14.99 1.65 0.03 [2] Green


52

Rank LAA ref.


use

% overlap Zone 2

% overlap

Zone 3a

% overlap Zone 3b

(functional

floodplain)

Surface water:

% overlap


Surface water:

% overlap 1 in 100

year event

Surface water:


Ground Water

Susceptibility6

LAA Rating

478 Part of SSE Depot, Lower Weybourne Lane, Farnham

Housing 0 0 0 78.62 4.89 0.04 [2] Green

556 Between Hale Road and Guildford Road, Farnham

Housing 0 0 0 12.07 0.06 0.05 [2] Red

65 550 1-9 Romans Business Park (Site A), Farnham

Housing 0 0 0 15.45 2.72 0.05 [2] Red

352 Land at Woolmer Hill, Woolmer Hill Road, Haslemere

Housing 0 0 0 3.30 1.24 0.11 [2] Red

472 Alfold Garden Centre, Alfold Crossways Housing 0 0 0 4.31 0.68 0.13 [3] Green

346 South of Chestnut Way, Busbridge Housing 0 0 0 0.83 0.46 0.24 [1] Red

711 Loxwood Road, Springbok Estate, Alfold Housing 0 0 0 42.33 4.60 0.27 [3] Red

70 364 Moushill Mead, Portsmouth Road, Milford Housing 0 0 0 4.58 1.22 0.34 [2] Green

824 Four Trees, Hookley Lane, Elstead Housing 0 0 0 20.93 1.96 0.38 [2] Green

461 Rear of 48 Wrecclesham Hill, Farnham Housing 0 0 0 4.21 0.63 0.40 [1] Red

872 Little Acres Nursery, Badshot Lea Housing 0 0 0 6.65 0.57 0.47 [2] Green

688 Bowles Farm, Horsham Road, Cranleigh Housing 0 0 0 7.44 1.34 0.61 [3] Red

75 632 Barrow Hills School, Witley Housing 0 0 0 8.21 3.23 0.63 [2] Red

713 Garden Style, Wrecclesham Hill, Farnham * Housing 0 0 0 4.58 0.88 0.67 [1] Green

770 Knowle Livery, Old Park Lane, Farnham Housing 0 0 0 13.33 0.89 0.67 [2] Green

465 Weydown Industrial Estate (adjacent Haslemere station)

Housing 0 0 0 21.16 5.35 0.71 [2] Red


53

Rank LAA ref.


use

% overlap Zone 2

% overlap

Zone 3a

% overlap Zone 3b

(functional

floodplain)

Surface water:

% overlap


Surface water:

% overlap 1 in 100

year event

Surface water:


Ground Water

Susceptibility6

LAA Rating

368 Wheeler Street Nurseries, Wheeler Lane, Witley

Housing 0 0 0 6.72 1.12 0.80 [2] Green

80 902 Heath Farm, Heath Lane, Busbridge Housing 0 0 0 7.01 1.54 0.98 [1] Red

893 Brookfield, Horsham Road, Alfold Housing 0 0 0 47.74 1.08 1.00 [3] Green

400 North of Penlan, Cranleigh Road, Ewhurst Housing 0 0 0 15.57 5.48 1.02 [3] Green

620 Adjacent Ruffold Farm, Guildford Road, Cranleigh

Housing 0 0 0 29.67 5.16 1.10 [3] Red

438 West of Green Lane, Badshot Lea Housing 0 0 0 39.53 4.78 1.15 [2] Green

85 881 The Old Hop Kiln, Long Garden Walk, Farnham

Housing 0 0 0 2.84 1.21 1.21 [2] Green

633 Cramhurst Lane, Witley Housing 0 0 0 25.90 8.02 1.24 [2] Red

909 R/o Tamarisk, Mapledrakes Road, Ewhurst Housing 0 0 0 11.09 2.71 1.52 [3] Red

96 Garages off Nursery Hill, Wonersh Housing 0 0 0 14.74 4.09 1.63 0 Green

294 Horsham Road, Cranleigh Housing 0 0 0 17.77 5.09 1.72 [3] Green

90 697 Wey Hill, Haslemere Housing 0 0 0 12.13 3.87 2.00 [2] Green

701 Lavender Lane, Farnham Housing 0 0 0 12.66 4.70 2.33 [3] Red

565 Land adjacent to Manfield Industrial Park, Cranleigh

Employment 0 0 0 11.34 4.82 2.40 [3] Red

787 Between Ruffold Farm and Guildford Road, Cranleigh

Housing 0 0 0 41.15 12.11 3.23 [3] Red

209 Keys Cottage & Wedgewood, Holloway Hill, Housing 0 0 0 21.49 7.20 3.24 [1] Green


54

Rank LAA ref.


use

% overlap Zone 2

% overlap

Zone 3a

% overlap Zone 3b

(functional

floodplain)

Surface water:

% overlap


Surface water:

% overlap 1 in 100

year event

Surface water:


Ground Water

Susceptibility6

LAA Rating

Godalming

95 286 Manor Lodge, Chiddingfold Housing 0 0 0 16.11 5.52 3.56 [3] Green

497 Cranleigh Brickworks, Baynards, Rudgwick Housing 0 0 0 17.72 6.60 3.57 0 Green

865 Rear of The Croft, Woodside Road, Chiddingfold

Housing 0 0 0 18.97 6.67 3.61 [3] Green

693 Hale Road, Farnham Housing 0 0 0 11.41 5.73 3.67 [2] Green

692 West of Sweeters Copse, Loxwood Road, Alfold Crossways *

Housing 0 0 0 23.65 7.11 3.81 0 Red

100 452 Petworth Road, Witley Housing 0 0 0 22.29 9.07 4.39 [2] Red

402 South of Field View Close, Chiddingfold Housing 0 0 0 12.26 8.90 4.49 [3] Green

847 Adjacent to Petworth Road, Witley Housing 0 0 0 28.55 8.93 4.97 [2] Red

670 The Woolmead, Farnham * MIxed 0 0 0 12.12 8.84 5.39 [2] Green

8 Notcutts, Guildford Road, Cranleigh Housing 0 0 0 35.06 12.44 5.73 [3] Red

105 293 Cranleigh Nurseries, Guildford Road, Rowly Housing 0 0 0 56.02 16.67 5.98 [3] Red

747 Adjacent Nugent Close, Dunsfold Housing 0 0 0 12.69 8.62 6.48 [2] Green

669 Homeleigh Nursery, Guildford Road, Cranleigh

Housing 0 0 0 67.24 12.61 6.57 [3] Red

848 Between Dunsfold Road and Loxwood Road, Alfold

Housing 0 0 0 35.27 12.88 6.85 [3] Red

564 Century Farm, Green Lane, Badshot Lea Housing 0 0 0 71.03 28.74 7.47 [2] Red


55

Rank LAA ref.


use

% overlap Zone 2

% overlap

Zone 3a

% overlap Zone 3b

(functional

floodplain)

Surface water:

% overlap


Surface water:

% overlap 1 in 100

year event

Surface water:


Ground Water

Susceptibility6

LAA Rating

110 136 35 - 42 East Street, Farnham Housing 0 0 0 15.42 9.96 8.25 [2] Red

871 Adjacent Petworth Road, Milford Housing 0 0 0 49.14 13.05 8.70 [2] Red

296 Ruffolds Farm, Guildford Road, Cranleigh Housing 0 0 0 58.49 24.99 9.16 [3] Red

448 Rear of 10 & 11 Busdens Close, Milford Housing 0 0 0 25.30 17.75 9.27 [2] Red

840 The Old Stick Factory, Fisher Lane, Chiddingfold

Housing 0 0 0 64.83 18.79 9.40 0 Red

115 694 Smokejacks, Horsham Road, Ewhurst Housing 0 0 0 29.96 15.98 14.42 [3] Red

862 West Street (Harts Yard), Farnham Housing 0 0 0 38.28 23.15 16.79 [2] Green

275 Adjacent Wildwood Golf Club, Horsham Road, Alfold

Housing 0 0 0 40.24 30.28 21.72 [3] Red

118 276 Adjoining Chilton Close, Alfold Crossways Housing 0 0 0 45.25 27.79 22.54 0 Green

EA Flood Zone 2

119 25 West of Badshot Lea Housing 5.99 0 0 24.05 5.73 1.66 [2] Green

285 The Bush Hotel, The Borough, Farnham Housing 98.39 0 0 7.88 0 0 [2] Green

121 27 East of Badshot Lea Housing 100 0 0 38.35 17.40 0.60 [2] Red

EA Flood Zone 3

122 643 Busdens Lane, Milford Housing 2.15 0.08 0 21.91 11.91 3.72 [2] Red

696 South of Frensham Vale Road, Farnham Housing 0.33 0.31 0 2.87 0.90 0.49 [3] Red

333 35 Frensham Vale, Lower Bourne, Housing 0.58 0.54 0 0.74 0.53 0.43 0 Red


56

Rank LAA ref.


use

% overlap Zone 2

% overlap

Zone 3a

% overlap Zone 3b

(functional

floodplain)

Surface water:

% overlap


Surface water:

% overlap 1 in 100

year event

Surface water:


Ground Water

Susceptibility6

LAA Rating

Farnham

125 10 Dunsfold Aerodrome Mixed 1.80 0.61 0 27.98 9.33 5.66 [3] Green

29 Coxbridge Farm, Alton Road, Farnham Housing 2.23 1.85 0 4.31 1.45 1.06 [2] Green

365 Hurst Gate, Portsmouth Road, Milford Housing 4.69 4.13 0 0.98 0.45 0 [1] Red

80 Concours Peugeot, Sturt Road, Haslemere Housing 4.33 4.33 0 26.14 3.79 2.25 [2] Red

644 Cedar House, Byworth Road, Farnham Housing 5.58 4.99 0 25.74 16.82 13.90 [2] Red

130 245 5 - 21 Weyhill, Haslemere Housing 8.03 7.20 0 3.31 0.70 0.06 [2] Green

141 West Street (including Key Site), Haslemere

Housing 7.38 7.38 0 18.21 9.76 4.23 [2] Green

450 Opposite Milford Golf Club, Milford Housing 12.95 10.75 0 11.23 3.91 1.06 [2] Green

615 East of Low Lane, Badshot Lea Housing 100 13.10 0 35.60 3.57 1.66 [2] Red

772 Westbrook Mills, Borough Road, Godalming Housing 100 15.91 0 0 0 0 [1] Red

135 264 Victoria House, South Street, Farnham Housing 100 20.52 0 28.46 0.25 0 [2] Green

679 30 Frensham Vale, Lower Bourne, Farnham

Housing 25.83 22.14 0 30.99 21.16 11.35 [1] Red

854 Low Lane, Badshot Lea Housing 100 36.64 0 40.90 0.06 0 [2] Red

94 Rear of 48-58 Church Road, Milford Housing 53.54 47.27 0 44.98 16.26 3.10 [2] Green

853 Little Meadow, Cranleigh Housing 4.67 0.15 0.15 8.88 3.62 2.91 [3] Green

140 622 The Nursery, Gosden Common, Bramley Housing 7.91 2.35 1.50 16.55 4.98 0.49 [2] Red


57

Rank LAA ref.


use

% overlap Zone 2

% overlap

Zone 3a

% overlap Zone 3b

(functional

floodplain)

Surface water:

% overlap


Surface water:

% overlap 1 in 100

year event

Surface water:


Ground Water

Susceptibility6

LAA Rating

292 West Cranleigh Nurseries, Knowle Lane, Cranleigh

Housing 20.37 7.43 2.70 25.46 9.72 4.59 [3] Green

567 Panda House/Riverview House, Catteshall Lane, Godalming

Housing 5.89 3.26 3.26 15.23 1.85 0.55 [2] Red

780 Panda House, Catteshall Lane, Godalming Housing 9.25 3.40 3.41 23.47 2.42 0 [2] Red

332 Waverley Lane, Farnham Housing 12.19 7.20 5.05 8.98 5.82 3.05 [1] Red

145 874 Elmbridge Road, Cranleigh Housing 43.45 21.12 8.98 16.59 0.66 0.18 [3] Green

11 Astra House, Cranleigh Housing 17.25 17.25 17.15 99.97 67.90 64.22 [3] Red


Housing 33.80 30.85 28.27 15.93 2.65 0.08 [2] Green

343 Stockwood Way, Hale, Farnham Housing 83.81 43.40 38.28 73.01 28.50 12.39 [3] Red

33 Service Station, Badshot Lea Road, Badshot Lea

Housing 100 100 38.48 16.94 0 0 [2] Red

150 5 Astra House and adjacent The Common, Cranleigh

Housing 49.59 48.84 48.83 75.20 28.94 19.85 0 Red

552 Jewsons, The Common, Cranleigh Housing 80.48 68.82 53.22 64.27 22.58 3.44 [3] Red

609 123a Badshot Lea Road, Badshot Lea Housing 100 96.51 55.95 11.74 0 0 [2] Red

383 Cranleigh C of E Primary School, Parsonage Road

Housing 62.98 61.67 59.90 11.11 1.48 0 [3] Green

52 Thames Water, Borough Road, Godalming Mixed 100 80.60 67.65 34.18 20.53 10.27 [1] Red

155 436 Preymead Farm Industrial Estate, Badshot Lea Road

Housing 100 97.16 94.28 45.43 0.94 0 [3] Red


58

Capita Property and Infrastructure Ltd

65 Gresham Street

London

EC2V 7NQ

Tel +44 (0)1342 333530

www.capita.co.uk

hart district council strategic flood risk assessment...waverley level 2 sfra august 2016 (updated...

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