land at picknage road/ chishill road barley north
TRANSCRIPT
Land at Picknage Road/ Chishill Road Barley North Hertfordshire Residential Development Surface Water Drainage and SUDS Statement November 2016
Unit 23 The Maltings Stanstead Abbotts Hertfordshire SG12 8HG Tel 01920 871 777
www.eastp.co.uk
14b Fieldgate Lane Kenilworth
Warwickshire CV8 1BT
Tel 01926 746820
Document History
JOB NUMBER: 983
DOCUMENT REF: Barley Drainage and SUDS Statement
REVISIONS: Final 2
Revision Comments By Checked Authorised Date
Draft 1 For client comment EE PE PE 04/11/16
Final For Submission PE Client PE 28/11/16
Final 2 For Submission PE Client PE 29/11/16
Contents
1 Introduction 1
2 Policy Guidance 2 National Policy 2 District Local Plan No.2 with alterations originally adopted April 1996 2 Hertfordshire SUDs design guidance 2015 2
3 Site Description 3 Local Watercourses 3 Site Levels 3 Geology and Infiltration 3 Sewers 4 Existing Layout and Drainage 5
4 Surface Water Flood Risk 6 Historic Surface Water Incidents 6 Existing Surface Water Flood Risk 6 Mitigation Measures 6
5 Sustainable Drainage Strategy 7 Relevant SUDS Policy 7 Site-Specific SUDS 8
6 Proposed Drainage Strategy 9 Soakaways 9 Permeable Paving 9 Rainwater Harvesting 10 Maintenance of Development Drainage System 10
7 Conclusions 12
8 Appendices 13
Appendix: A Location Plan A-1 Appendix: B Development Layout B-2 Appendix: C EA Flood Map for Planning C-3 Appendix: D Topographic Survey D-4 Appendix: E Anglian Water Sewer Records E-5 Appendix: F Risk of Flooding From Surface Water F-6
Drainage and SUDS Statement
Page 1
1 Introduction
1.1 EAS has been commissioned by Bidwells to prepare a flood risk and SUDS Statement to accompany a
local plan submission for a mixed residential/ commercial development. The purpose of this plan is to
identify any potential flooding issues which could affect the site and outline appropriate methods by which
surface water from the site could be drained.
1.2 The site is located at the junction of Picknage Road and Chishill Road in the village of Barley, North
Hertfordshire and covers an area of approximately 1.4 hectares.
1.3 The grid reference for the site is 540250, 238657 and the nearest postcode is SG8 8HP. A location plan
is included as Appendix A.
1.4 The site comprises of agricultural land used presently for crop growing with two dilapidated barns and
hardstanding situated in the south of the site. The site is broadly rectangular with most the site frontage
facing on to Picknage Road.
1.5 The proposed scheme will be for 12 residential units organised in a linear arrangement with an access
road running parallel to Picknage Road. A shop will be situated towards the north of the site with parking.
The proposed development plan is included in Appendix B.
1.6 The contents of this SUDS Statement are based on the advice set out in The National Planning Policy
Framework (NPPF) and the Technical Guidance to the NPPF, published March 2012, and the Planning
Practice Guidance (PPG), published March 2014.
1.7 This report is based on the following data: Environment Agency Flood Maps; BGS geological information;
OS mapping and LLFA flooding information
Drainage and SUDS Statement
Page 2
2 Policy Guidance
National Policy
2.1 The contents of this FRA are based on the advice set out in The National Planning Policy Framework
(NPPF) published March 2012 and the Planning Practice Guidance (PPG), published March 2014.
2.2 The Planning Practice Guidance NPPF Table 1 (Paragraph 065) defines each Flood Zone along with
appropriate land use and FRA requirements. The flood risk zones are defined as follows:
Flood Zone 1 – This zone comprises land assessed as having a less than 1 in 1,000 annual probability of river flooding (<0.1%).
Flood Zone 2 – This zone comprises land assessed as having between a 1 in 100 and 1 in 1,000 annual probability of river flooding.
Flood Zone 3a – This zone comprises land assessed as having a 1 in 100 or greater annual probability of river flooding (>1%), and for tidal flooding at least a 0.5% annual probability of flooding from tidal sources.
Flood Zone 3b – This zone comprises land where water has to flow or be stored in times of flood.
2.3 The Environment Agency Flood Map for Planning, included as Appendix C, shows the site to be located
entirely in Flood Zone 1, at low risk of flooding from Main rivers and the sea. This is an area with a less
than 1 in 1000 chance of flooding each year.
2.4 For sites located within Flood Zone 1, the NPPF states that developers and local authorities should seek
opportunities to reduce the overall level of flood risk in the area and beyond through the layout and form
of the development, and the appropriate application of sustainable drainage systems.
2.5 This surface water drainage and SUDS statement explores the appropriate application of sustainable
drainage systems as required for sites within Flood Zone 1.
District Local Plan No.2 with alterations originally adopted April 1996
2.6 As of 27 September 2007, several policies from North Hertfordshire District Local Plan No. 2 with
Alterations (April 1996) cease to have effect, under the Planning & Compulsory Purchase Act 2004.
There are no saved plans relating to flood risk or drainage and therefore no relevant local district policy.
Hertfordshire Local Flood Risk Management Strategy and SUDs design guidance
2.7 Local Flood Risk Management Strategy for Hertfordshire was published and this included a specific
policy relating to the approval and delivery of Sustainable Drainage Systems (SuDS) in Hertfordshire.
The principles of the Hertfordshire SUDs design guidance will be followed for the suggestion of
appropriate drainage techniques.
Drainage and SUDS Statement
Page 3
3 Site Description
3.1 The site is located to the east of Picknage Road, Barley, North Hertfordshire SG8 8HP. The site is situated
in a village setting, approximately 4.5km south east of the town of Royston and approximately 3km south
of the A505. A location plan is enclosed at Appendix A.
3.2 The site comprises of agricultural land used presently for crop growing with two dilapidated barns and
hardstanding situated in the south of the site. The site is broadly rectangular with most the site frontage
facing on to Picknage Road.
3.3 The proposed scheme will be for a village shop and 12 residential units comprising two 2 bed bungalows;
two 4 bedroom houses and eight 3 bedroom houses, with associated car parking; landscaping and
ancillary works. The housing will be organised in a linear arrangement with an access road running parallel
to Picknage Road. A shop will be situated to the north of the site with associated parking and an area of
woodland planting is proposed at the northern and eastern boundaries of the site.
3.4 The proposed development plan is included in Appendix B.
Local Watercourses
3.5 The nearest watercourse is a drainage ditch running parallel to the private road in an easterly direction
approximately 50m to the north of the northern boundary of the site as shown on the topographical
survey in Appendix D. The ditch joins the Cumberton Bottom Drain, an ordinary watercourse,
approximately 500m to the north east of the site before continuing to flow in a northerly direction towards
Flint Cross and the A505.
Site Levels
3.6 The topographic survey (Appendix D) shows the site appears to fall in a northerly direction. The average
slope of the site is approximately 1:25, with gradients to the south of the site at approximately 1:43 and
gradients to the north of the site sloping steeply at approximately 1:17. The highest elevations were
recorded at around 92.14m AOD at the frontage on to Picknage Road at the south of the site. The lowest
elevations at the northern boundary 80.13m AOD.
Geology and Infiltration
3.7 British Geological Survey mapping shows the area to have a bedrock of New Pit Chalk Formation – Chalk
with no superficial deposits recorded. Typically New Pit Chalk is Principally blocky, white firm to moderately
hard chalk with numerous marls or paired marl seams.
Drainage and SUDS Statement
Page 4
3.8 The chalk bedrock is classed as a Principal Aquifer by the EA. This is defined as: “Layers of rock or drift
deposits that have high intergranular and/or fracture permeability - meaning they usually provide a high
level of water storage. They may support water supply and/or river base flow on a strategic scale.”
3.9 Nearby Onshore Groundwater Borehole records were obtained from the British Geological Survey website
at Manor Farm (540310, 238460) and Picknage Corner (540180, 238510). Maximum levels were recorded
at 83 ft (25.3m).
3.10 The presence of the Principal Aquifer means that the site is in a ‘Major Aquifer Intermediate’ groundwater
vulnerability zone. This is an area above a Principal Aquifer which is vulnerable to pollutants. Therefore,
it is important that the methods used to drain the site do not mobilise any potential contaminants within the
ground which would result in polluting the aquifer.
3.11 The geology and groundwater levels recorded close to this site indicate that drainage via infiltration should
be possible at the site. Infiltration testing at the detailed design stage is recommended to specify the exact
drainage design.
3.12 The presence of the chalk aquifer in Hertfordshire and other underground water bearing areas such as
the river gravel deposits mean that there is potential for groundwater flooding in Hertfordshire. There are
confirmed cases, both widespread and in settlements known to be at risk. However, map 2 of the
Hertfordshire LFRMS “Areas Susceptible to Groundwater Flooding for Hertfordshire” shows the area
around Royston to be at low risk of groundwater flooding.
3.13 Given this, and with the recorded depth of groundwater recorded at nearby locations at some 20m BGL,
the risk of groundwater flooding is thought to be low.
Sewers
3.14 The Anglian Water sewer records contained in Appendix E show there to be a foul rising main within the
site boundary, running parallel to the southern boundary of the site. This connects to the gravity foul sewer
flowing in a northerly direction in Picknage Road.
3.15 No surface water sewers were mapped within the village of Barley and no reports of sewer flooding from
the public sewer were included for Barley in the 2008 SFRA.
3.16 The risk of flooding from existing sewers is thought to be low, however an easement distance from the
existing sewer will need to be incorporated into the detailed site design or an application made to move
the sewer line.
Drainage and SUDS Statement
Page 5
Existing Layout and Drainage
3.17 As an agricultural field, it is unlikely that there is an existing drainage system for the site. Instead, it is likely
that surface water infiltrates into the ground. Due to the steepness of the site, it is likely that sheet wash
also occurs into the drainage ditch to the north of the site in intense storms.
Drainage and SUDS Statement
Page 6
4 Surface Water Flood Risk
Historic Surface Water Incidents
4.1 The September 2016 SFRA update does not include any reference to Barley.
4.2 Searches of local media suggest that flooding has occurred within Barley
In May 2007 flooding was reported on High Street; Church End; Picknage Road and Shafentoe End (Hertfordshire Mercury, May 18 2007)
In January 2014 highways gullies were overwhelmed at the junction of London Road and High Street at the Fox and Hounds pub
4.3 No evidence was found of these events caused flooding within the site boundary.
Existing Surface Water Flood Risk
4.4 The Risk of Surface Water Flooding map shown in Appendix F shows a flood risk to the northern extent
of the site from the ditch running parallel to the road. This area is proposed to be an area of woodland
and therefore no built development will be at risk from the ditch. No other flow paths are shown within the
site boundary on the surface water flood map.
Mitigation Measures
4.5 Care should be taken to ensure that planting to the north of the site does not reduce the cross sectional
area of the functional floodplain of the watercourse (it is not thought that the watercourse is within the
site boundary). It is envisaged that a suitable standoff distance for planting from the watercourse should
be included into the detailed design to ensure that planting does not increase flood risk to existing
properties. It is highly unlikely that properties within the proposed site boundary would not be at risk from
this watercourse.
4.6 A suitable surface water drainage strategy should be incorporated into the design of the development to
ensure that flood risk to the site or elsewhere is not increased. Potential drainage methods are outlined
in section 5 below.
Drainage and SUDS Statement
Page 7
5 Sustainable Drainage Strategy
Relevant SUDS Policy
5.1 The NPPF states within Flood Zone 1, “developers and local authorities should seek opportunities to
reduce the overall level of flood risk in the area and beyond through the layout and form of the development,
and the appropriate application of sustainable drainage techniques (SUDS)”.
5.2 SUDS mimic the natural drainage system and provide a method of surface water drainage which can
decrease the quantity of water discharged, and hence reduce the risk of flooding. In addition to reducing
flood risk, these features can improve water quality and provide biodiversity and amenity benefits.
5.3 The SUDS management train incorporates a hierarchy of techniques and considers all three SUDS criteria
of flood reduction, pollution reduction, and landscape and wildlife benefit. In decreasing order of
preference, the preferred means of disposal of surface water runoff is:
Discharge to ground.
Discharge to a surface water body.
Discharge to a surface water sewer.
Discharge to a combined sewer.
5.4 The philosophy of SUDS is to replicate as closely as possible the natural drainage from a site pre-
development and to treat runoff to remove pollutants, resulting in a reduced impact on the receiving
watercourses. The benefits of this approach are as follows:
Reducing runoff rates, thus reducing the flood risk downstream.
Reducing pollutant concentrations, thus protecting the quality of the receiving water body.
Groundwater recharge.
Contributing to the enhanced amenity and aesthetic value of development areas.
Providing habitats for wildlife in developed areas, and opportunity for biodiversity enhancement.
5.5 The appropriateness of different SUDs techniques for the development site are listed in the table below.
Drainage and SUDS Statement
Page 8
Site-Specific SUDS
5.6
Device Description Constraints / Comments Appropriate
Living roofs (source control) Provide soft landscaping at roof level which reduces surface water runoff.
Unlikely to be suitable for residential dwellings due to maintenance issues and pitch of roof.
No
Infiltration devices & Soakaways (source control)
Store runoff and allow water to percolate into the ground via natural infiltration.
Infiltration tests should be undertaken to confirm viability Yes
Pervious surfaces (source control)
Storm water is allowed to infiltrate through the surface into a storage layer, from which it can either infiltrate and/or slowly release to sewers.
Infiltration tests should be undertaken to confirm viability Yes
Rainwater harvesting (source control)
Reduces the annual average rate of runoff from the Site by reusing water for non-potable uses e.g. toilet flushing, recycling processes.
Could be incorporated into design Yes
Swales (permeable conveyance)
Broad shallow channels that convey / store runoff, and allow infiltration (ground conditions permitting).
Infiltration tests should be undertaken to confirm viability Yes
Filter drains & perforated pipes (permeable conveyance)
Trenches filled with granular materials (which are designed to take flows from adjacent impermeable areas) that convey runoff while allowing infiltration.
Infiltration tests should be undertaken to confirm viability Yes
Infiltration basins (end of pipe treatment)
Depressions in the surface designed to store runoff and allow infiltration.
Infiltration tests should be undertaken to confirm viability. Control at source preferred
Possibly
Wet ponds & constructed wetlands (end of pipe treatment)
Provide water quality treatment & temporary storage above the permanent water level.
Only if infiltration is not possible Possibly
Attenuation Underground (end of pipe treatment)
Oversized pipes or geo-cellular tanks designed to store water below ground level.
Infiltration or surface level attenuation preferred Possibly
Table 1: Site-Specific Sustainable Drainage Techniques
Drainage and SUDS Statement
Page 9
6 Proposed Drainage Strategy
6.1 The primary method of draining the site will be by infiltration, if infiltration rates are shown to be sufficient.
Infiltration can contribute to reducing runoff rates and volumes whilst supporting baseflow and
groundwater recharge and is the preferred means of surface water discharge.
Soakaways
6.2 Soakaways are excavations which are filled with a void forming material which allows for the temporary
storage of water before it soaks into the ground.
6.3 Individual property soakaways could be incorporated into the site if infiltration rates allow for a half drain
time of less than 24 hours. Concrete manhole soakaways have the benefit of access for maintenance
and inspection and soakaways should be situated with easy access for these purposes.
6.4 Responsibility for maintenance of individual soakaways would fall to the respective homeowners. If a
centralised infiltration basin was preferred, this would most likely become the responsibility of a
maintenance company.
Permeable Paving
6.5 It is proposed that permeable paving should be used on the car park and access roads within the site
boundary. Permeable paving will provide the benefit of filtering runoff from these areas before infiltration
into the ground.
6.6 The following typical construction would be expected for the areas of permeable paving based on guidance
from Marshalls for the popular Priora Paving system):
(a) 80mm paving course
(b) 50mm laying course (generally a 6mm aggregate)
(c) 80mm layer of perforated Asphalt Concrete (DBM)
(d) A calculated depth of course grade aggregate (generally 250mm of a 30mm aggregate)
(e) An additional sub-base / capping layer if required.
6.7 The depth of the course graded aggregate layer will be designed to meet both structural and attenuation
requirements, once CBR values have been measured which will inform the structural design at a detailed
design stage.
6.8 The Hertfordshire Highways Design Guide (3rd edition) states that block paving will be acceptable on
adoptable highway in some circumstances, therefore this may be possible whether or not the highway is
adopted.
Drainage and SUDS Statement
Page 10
Rainwater Harvesting
6.9 Rainwater harvesting is a method that could be used throughout the entire development to ensure the
efficient use of water, whilst also reducing runoff rates. This can be used to flush toilets; wash laundry
and water plants and can either be gravity fed (with water pumped to a tank in the roof space) or
pumped directly from a ground-level or underground storage unit if the roof area is utilised for extra living
accommodation. These systems are backed up with a connection to the mains so that in times of water
scarcity, should the stored rainwater run out, there is no loss of water to those appliances which would
normally utilise rainwater.
Maintenance of Development Drainage System
6.10 It is proposed that the maintenance of the surface water drainage systems will be the responsibility of the
site owner/manager and will not be offered for adoption.
6.11 A regular maintenance schedule must be prepared for the permeable paving to ensure it is carefully
managed throughout the year. Several tasks are required at different points in the year, including but not
limited to those set out in Table 3.
6.12 In addition, the proposed surface water sewers should be regularly inspected and maintained to ensure
they are effective throughout the lifetime of the development and do not become blocked or damaged over
time.
Maintenance Schedule
Required Action Frequency
Regular
maintenance
Brushing and vacuuming.
Three times per year at
end of winter, mid-summer,
after autumn leaf fall, or as
required based on site
specific observations of
clogging or manufacturer’s
recommendations.
Occasional
maintenance
Stabilise and mow contributing and
adjacent areas.
Removal of weeds.
As required.
As required.
Remedial actions Remediate any landscaping which,
through vegetation maintenance of
As required
Drainage and SUDS Statement
Page 11
soil slip, has been raised to within
50mm of the level of the paving.
Remedial work to any depressions,
rutting and cracked or broken blocks
considered detrimental to the
structural performance of a hazard to
the user.
Rehabilitation of surface and upper
sub-surface.
As required
As required (if infiltration
performance is reduced as
a result of significant
clogging.)
Monitoring Initial inspection
Inspect for evidence of poor operation
and/or weed growth. If required, take
remedial action.
Inspect silt accumulation rates and
establish appropriate brushing
frequencies.
Monitor inspection chambers.
Monthly for 3 months after
installation. 3 monthly, 48
hours after large storms.
Annually.
Annually.
Table 3: Maintenance tasks for permeable paving (Source: CIRIA C697, The SUDS Manual)
Drainage and SUDS Statement
Page 12
7 Conclusions
7.1 EAS has been commissioned by Bidwells to prepare a flood risk and SUDS Statement to accompany a
local plan submission for a mixed residential/ commercial development. The purpose of this plan is to
identify any potential flooding issues which could affect the site and outline appropriate methods by which
surface water from the site could be drained.
7.2 The site is located at the junction of Picknage Road and Chishill Road in the village of Barley, North
Hertfordshire and covers an area of approximately 1.4 hectares. The site comprises of agricultural land
used presently for crop growing with two dilapidated barns and hardstanding situated in the south of the
site.
7.3 The proposed scheme will be for 12 residential units and a shop with associated parking; ancillary uses
and woodland to the north and east of the site.
7.4 The report has identified that the areas of the site proposed for development are at low risk of flooding.
An area to the north of the site next to the ditch will be planted as an area of woodland and therefore
development on the site is sited to be at the minimum possible flood risk.
7.5 The preferred drainage strategy for the site would be infiltration into the ground, offering a highly
sustainable surface water drainage option for the site. Several different SUDs elements have been
included as potential drainage methods to form a SUDs train of attenuation and surface water treatment.
7.6 In conclusion, the site is at low risk of flooding but has still been configured to ensure that housing is sited
away from the ditch to the north to minimise residual risks. The site also has the potential to provide a
highly sustainable method of surface water drainage through soakaways and permeable paving.
Drainage and SUDS Statement
Page 13
8 Appendices
Appendix: A Location Plan
Appendix: B Development Layout
Appendix: C EA Flood Map for Planning
Appendix: D Topographic Survey
Appendix: E Anglian Water Sewer Records
Appendix: F Risk of Flooding From Surface Water
Drainage and SUDS Statement
Page A-1
Appendix: A LOCATION PLAN
Drainage and SUDS Statement
Page B-2
Appendix: B DEVELOPMENT LAYOUT
Drainage and SUDS Statement
Page C-3
Appendix: C EA FLOOD MAP FOR PLANNING
Envir
onm
ent A
genc
y Flo
od M
ap fo
r Plan
ning
- Acc
esse
d 21
/10/
2016
Drainage and SUDS Statement
Page D-4
Appendix: D TOPOGRAPHIC SURVEY
A R A B L E
F I E L D
A R A B L E
F I E L D
A R A B L E
F I E L D
No.25
No.28
No.24
No.22
P I C K N A G
E R O A D
P A S T U R E
MK1 540452.425 238655.494 85.592
MK10 540184.066 238909.558 79.856
MK2 540379.879 238617.853 89.610
MK6 540158.104 238731.460 83.068
MK7 540143.011 238806.760 81.354
MK9 540141.541 238877.744 80.890
STATION EASTING NORTHING LEVEL
MK7A 540098.415 238828.494 82.168
MK8 540122.493 238856.095 81.466
MK11 540184.485 238857.974 79.517
MK3 540320.271 238571.623 92.015
MK4 540288.881 238583.141 92.089
MK5 540214.864 238652.763 87.232
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A R A B L E
F I E L D
A R A B L E
F I E L D
No.2
No.1
25
No.28
No.29
No.32No.33
No.36
O A D
P I C K
N A G E
R O A
D
P A S T U R E
MK1 540452.425 238655.494 85.592
MK10 540184.066 238909.558 79.856
MK2 540379.879 238617.853 89.610
MK6 540158.104 238731.460 83.068
MK7 540143.011 238806.760 81.354
MK9 540141.541 238877.744 80.890
STATION EASTING NORTHING LEVEL
MK7A 540098.415 238828.494 82.168
MK8 540122.493 238856.095 81.466
MK11 540184.485 238857.974 79.517
MK3 540320.271 238571.623 92.015
MK4 540288.881 238583.141 92.089
MK5 540214.864 238652.763 87.232
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A R A B L E
F I E L D
A R A B L E
F I E L DA R A B L E
F I E L D
P A S T U R E
B A R N
(DILAP.)
B A R N
(DILAP.)
P I C K N A G E R O A D
P I C K N A G E R O A D
P I C K N A G E R O A D
UR C H E N D
MK1 540452.425 238655.494 85.592
MK10 540184.066 238909.558 79.856
MK2 540379.879 238617.853 89.610
MK6 540158.104 238731.460 83.068
MK7 540143.011 238806.760 81.354
MK9 540141.541 238877.744 80.890
STATION EASTING NORTHING LEVEL
MK7A 540098.415 238828.494 82.168
MK8 540122.493 238856.095 81.466
MK11 540184.485 238857.974 79.517
MK3 540320.271 238571.623 92.015
MK4 540288.881 238583.141 92.089
MK5 540214.864 238652.763 87.232
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0790
7353
858
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Junc
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of P
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A R A B L E
F I E L D
A R A B L E
F I E L D
P A S T U R E
P A S T U R E
B A R N
(DILAP.)
GARAGE
B A R N
(DILAP.)
P I C K N A G E R O A D
P I C K N A G E R O A D
C H U R C H E N D
C H U R C H E N D
MK1 540452.425 238655.494 85.592
MK10 540184.066 238909.558 79.856
MK2 540379.879 238617.853 89.610
MK6 540158.104 238731.460 83.068
MK7 540143.011 238806.760 81.354
MK9 540141.541 238877.744 80.890
STATION EASTING NORTHING LEVEL
MK7A 540098.415 238828.494 82.168
MK8 540122.493 238856.095 81.466
MK11 540184.485 238857.974 79.517
MK3 540320.271 238571.623 92.015
MK4 540288.881 238583.141 92.089
MK5 540214.864 238652.763 87.232
Dog
get F
amily
Tru
st c
/o P
eter
Hom
ent
Lake
Hou
seM
arke
t Hill
Roy
ston
ww
w.s
asur
veys
.co.
uk
Topo
grap
hica
l sur
vey
with
spo
t ele
vatio
ns.
35 W
inst
on C
resc
ent,
Big
gles
wad
eB
edfo
rdsh
ire, S
G18
0E
T
Em
ail
gene
ral@
sasu
rvey
s.co
.uk
Tel.
0790
7353
858
Sim
ply
Acc
urat
e Su
rvey
s
Junc
tion
of P
ickn
age
Rd.
and
Chu
rch
End,
Bar
ley.
Har
dcas
tle B
urto
n LL
P C
hart
ered
Acc
ount
ants
SG
8 9J
N
She
et 1
She
et 2
She
et 3
Shee
t 4S
heet
5
A R A B L E
F I E L D
A R A B L E
F I E L D
B A R N
(DILAP.)
CH U R C H E N D
C H U R C H E N D
C H U R C H E N D
C H U R C H E N D
P A S T U R E
A R A B L E
F I E L D
MK1 540452.425 238655.494 85.592
MK10 540184.066 238909.558 79.856
MK2 540379.879 238617.853 89.610
MK6 540158.104 238731.460 83.068
MK7 540143.011 238806.760 81.354
MK9 540141.541 238877.744 80.890
STATION EASTING NORTHING LEVEL
MK7A 540098.415 238828.494 82.168
MK8 540122.493 238856.095 81.466
MK11 540184.485 238857.974 79.517
MK3 540320.271 238571.623 92.015
MK4 540288.881 238583.141 92.089
MK5 540214.864 238652.763 87.232
Dog
get F
amily
Tru
st c
/o P
eter
Hom
ent
Lake
Hou
seM
arke
t Hill
Roy
ston
ww
w.s
asur
veys
.co.
uk
Topo
grap
hica
l sur
vey
with
spo
t ele
vatio
ns.
35 W
inst
on C
resc
ent,
Big
gles
wad
eB
edfo
rdsh
ire, S
G18
0E
T
Em
ail
gene
ral@
sasu
rvey
s.co
.uk
Tel.
0790
7353
858
Sim
ply
Acc
urat
e Su
rvey
s
Junc
tion
of P
ickn
age
Rd.
and
Chu
rch
End,
Bar
ley.
Har
dcas
tle B
urto
n LL
P C
hart
ered
Acc
ount
ants
SG
8 9J
N
She
et 1
She
et 2
She
et 3
She
et 4
Shee
t 5
Drainage and SUDS Statement
Page E-5
Appendix: E ANGLIAN WATER SEWER RECORDS
This
pla
n is
pro
vide
d by
Ang
lian
Wat
er p
ursu
ant i
ts o
blig
atio
ns u
nder
the
Wat
er In
dust
ry A
ct 1
991
sect
ions
198
or 1
99. I
t mus
t be
used
in c
onju
nctio
n w
ith a
ny
sear
ch re
sults
atta
ched
. The
info
rmat
ion
on th
is p
lan
is b
ased
on
data
cur
rent
ly re
cord
ed b
ut p
ositi
on m
ust b
e re
gard
ed a
s ap
prox
imat
e. S
ervi
ce p
ipes
, priv
ate
sew
ers
and
drai
ns a
re g
ener
ally
not
sho
wn.
Use
rs o
f thi
s m
ap a
re s
trong
ly a
dvis
ed to
com
mis
sion
thei
r ow
n su
rvey
of t
he a
rea
show
n on
the
plan
bef
ore
carr
ying
out
any
wor
ks. T
he a
ctua
l pos
ition
of a
ll ap
para
tus
MU
ST
be e
stab
lishe
d by
tria
l hol
es. N
o lia
bilit
y w
hats
oeve
r, in
clud
ing
liabi
lity
for n
eglig
ence
, is
acce
pted
by
Ang
lian
Wat
er fo
r any
err
or o
r ina
ccur
acy
or o
mis
sion
, inc
ludi
ng th
e fa
ilure
to a
ccur
atel
y re
cord
, or r
ecor
d at
all,
the
loca
tion
of a
ny w
ater
mai
n,
disc
harg
e pi
pe, s
ewer
or d
ispo
sal m
ain
or a
ny it
em o
f app
arat
us. T
his
info
rmat
ion
is v
alid
for t
he d
ate
prin
ted.
Thi
s pl
an is
pro
duce
d by
Ang
lian
Wat
er S
ervi
ces
Lim
ited
(c) C
row
n co
pyrig
ht a
nd d
atab
ase
right
s 20
16 O
rdna
nce
Sur
vey
1000
2243
2.Th
is m
ap is
to b
e us
ed fo
r the
pur
pose
s of
vie
win
g th
e lo
catio
n of
Ang
lian
Wat
er p
lant
onl
y. A
ny o
ther
use
s of
the
map
dat
a or
furth
er c
opie
s is
not
per
mitt
ed. T
his
notic
e is
not
inte
nded
to e
xclu
de o
r res
trict
liab
ility
for d
eath
or
pers
onal
inju
ry re
sulti
ng fr
om n
eglig
ence
.
Foul
Sew
er
Fina
l Effl
uent
Dec
omm
issi
oned
Sew
er
(Col
our d
enot
es e
fflue
nt ty
pe)
(Col
our d
enot
es e
fflue
nt ty
pe)
Pum
ping
Sta
tion
Man
hole
Inle
t
Out
fall
Sew
age
Trea
tmen
t Wor
ks
Sur
face
Sew
er
Dat
e: 1
4/10
/16
Sca
le: 1
:125
0D
ata
upda
ted:
04/
07/1
6M
ap C
entre
: 540
000,
2387
61(c
) Cro
wn
copy
right
and
dat
abas
e rig
hts
2016
Ord
nanc
e S
urve
y 10
0022
432
Was
tew
ater
Pla
n A
1O
ur R
ef: 2
0142
1 - 1
Bar
ley
emm
a.el
woo
d@ea
stp.
co.u
k
(Col
our d
enot
es e
fflue
nt ty
pe)
(Col
our d
enot
es e
fflue
nt ty
pe)
(Col
our d
enot
es e
fflue
nt ty
pe)
Com
bine
d S
ewer
Priv
ate
Sew
er
Ris
ing
Mai
n
(Col
our d
enot
es e
fflue
nt ty
pe)
Man
hole
Ref
eren
ceE
astin
gN
orth
ing
Liqu
id T
ype
Cov
er L
evel
Inve
rt Le
vel
Dep
th to
Inve
rt
0001
5400
19 2
3900
2F
--
-00
0254
0091
239
031
F-
--
0003
5400
71 2
3900
1F
--
-00
0454
0059
239
000
F87
.685
.62
1.98
0701
5400
66 2
3879
3F
85.6
383
.93
1.7
0702
5400
10 2
3876
3F
83.7
182
.61.
1108
0054
0065
238
887
F-
--
0801
5400
04 2
3890
0F
--
-09
0054
0035
238
920
F-
--
0901
5400
96 2
3891
2F
--
-09
0354
0049
238
972
F-
85.0
35-
0904
5400
45 2
3898
9F
87.6
685
.41
2.25
0905
5400
70 2
3899
9F
87.4
0585
.745
1.66
0906
5400
54 2
3897
7F
87.2
285
.22
210
0054
0113
239
070
F-
--
1400
5401
52 2
3845
8F
--
-14
0154
0123
238
454
F-
--
1402
5401
59 2
3844
1F
--
-16
0054
0199
238
661
F-
--
1700
5401
33 2
3879
0F
--
-17
0154
0152
238
732
F-
--
1801
5401
43 2
3887
2F
82.2
180
.31.
9118
0254
0114
238
819
F83
.71
82.6
1.11
1803
5401
18 2
3885
6F
--
-18
0454
0123
238
834
F82
.37
81.4
60.
9124
0054
0206
238
472
F-
--
2500
5402
60 2
3851
2F
--
-26
0054
0264
238
603
F-
--
3000
5403
21 2
3902
6F
80.7
179
.31.
4130
0154
0379
239
075
F-
--
3500
5403
11 2
3856
3F
--
-85
0053
9891
238
517
F-
--
9400
5399
16 2
3848
9F
--
-94
0153
9945
238
487
F-
--
9500
5399
43 2
3852
6F
--
-96
0153
9931
238
665
F-
--
9602
5399
38 2
3860
0F
87.1
585
.53
1.62
9603
5399
98 2
3862
1F
--
-97
0153
9925
238
730
F87
.15
85.5
31.
6297
0253
9932
238
796
F-
--
9800
5399
46 2
3884
0F
--
-
Man
hole
Ref
eren
ceE
astin
gN
orth
ing
Liqu
id T
ype
Cov
er L
evel
Inve
rt Le
vel
Dep
th to
Inve
rtM
anho
le R
efer
ence
Eas
ting
Nor
thin
gLi
quid
Typ
eC
over
Lev
elIn
vert
Leve
lD
epth
to In
vert
Man
hole
Ref
eren
ceE
astin
gN
orth
ing
Liqu
id T
ype
Cov
er L
evel
Inve
rt Le
vel
Dep
th to
Inve
rt
Our
Ref
: 201
421
- 1
Drainage and SUDS Statement
Page F-6
Appendix: F RISK OF FLOODING FROM SURFACE WATER
Flood risk from surface water- Accessed 21/10/2016 https://flood-warning-information.service.gov.uk/long-term-flood-risk/map