Upload
others
View
2
Download
0
Embed Size (px)
Citation preview
JUNE 2018 | KT | P17-1499
Pegasus Group
Colmore Place | 39 Bennetts Hill | Birmingham | B2 5SN
T 0121 308 9570 | F 0121 323 2215 | W www.pegasusgroup.co.uk
Birmingham | Bracknell | Bristol | Cambridge | Cirencester | East Midlands | Leeds | Liverpool | London | Manchester ©Copyright Pegasus Planning Group Limited 2011. The contents of this document must not be copied or reproduced in whole or in part
without the written consent of Pegasus Planning Group Limited
LAND AT OVERSTONE GREEN, DAVENTRY
ENVIRONMENTAL IMPACT ASSESSMENT SCOPING REPORT
ON BEHALF OF GALLAGHER ESTATES AND DAVIDSONS GROUP
Gallagher Estates and Davidsons Group Overstone Green Environmental Impact Assessment Scoping Report
JUNE 2018 | KT | P17-1499 Page | 1
CONTENTS:
1 INTRODUCTION 2
2 THE APPLICATION SITE AND PROJECT OVERVIEW 6
3 LEGISLATIVE REQUIREMENTS AND THE EIA PROCESS 8
4 PROPOSED SCOPE OF THE EIA AND ENVIRONMENTAL STATEMENT CHAPTERS 14
5 TOPICS PROPOSED TO BE SCOPED OUT AND NOT INCLUDED WITHIN THE
ENVIRONMENTAL STATEMENT 57
6 STRUCTURE OF THE ENVIRONMENTAL STATEMENT 59
APPENDICES:
APPENDIX A - APPLICATION SITE LOCATION PLAN
APPENDIX B - SCHEDULE 4 OF 2017 EIA REGULATIONS
APPENDIX C - LANDSCAPE SCOPING REPORT
APPENDIX D - TECHNICAL BRIEFING NOTE: ECOLOGY INPUT INTO ES SCOPING
Gallagher Estates and Davidsons Group Overstone Green Environmental Impact Assessment Scoping Report
JUNE 2018 | KT | P17-1499 Page | 2
1 Introduction
1.1 This Environmental Impact Assessment (EIA) Scoping Report has been prepared on
behalf of Gallagher Estates and Davidsons Group (the “Applicants”) in respect of
land at Overstone Green, Daventry (the “Application Site”) on which it is proposed
to submit an outline planning application for residential development comprising
circa 1,600 dwellings, up to 3 hectares of employment land (including a local
centre), a primary school and associated infrastructure with access off the A43
Overstone Road (the “Proposed Development”). The location and extent of the site
are shown the Location Plan at Appendix A.
1.2 An application for planning permission will be submitted to Daventry District
Council in due course and this Scoping Report has been prepared to accompany a
formal EIA Scoping Request to the authorities under Regulation 15 of the Town and
Country Planning (EIA) Regulations 2017.
1.3 The Applicant has appointed a team of specialist consultants to consider planning
and environmental matters in relation to the Proposed Development and to provide
input into the production of this Scoping Report, as listed below.
Table 1.1 Consultant Team
Topic Consultant
Planning Pegasus Group
(Planning)
Landscape Golby & Luck
Ecology & Nature Conservation Aspect Ecology
Archaeology and Built Heritage Pegasus Group
(Heritage)
Transport and Access Jubb
Air Air Quality
Consultants
Noise Jubb
Flood Risk and Drainage Jubb
Ground Conditions and Contamination Jubb
Agricultural Land Assessment Land Research
Associates
1.4 The Scoping Report has been produced on behalf of Gallagher Estates and
Davidsons Group by Pegasus Group. Pegasus is registered to the EIA Quality Mark,
a scheme operated by the Institute of Environmental Management and Assessment
(IEMA) which allows consultancies that lead the co-ordination of statutory EIAs in
Gallagher Estates and Davidsons Group Overstone Green Environmental Impact Assessment Scoping Report
JUNE 2018 | KT | P17-1499 Page | 3
the UK to make a commitment to excellence in their EIA activities and have this
commitment independently reviewed.
Requirements of an Environmental Statement
1.5 EIA is a process for identifying the likely significant environmental effects
(beneficial and adverse) of proposed developments before development consent is
granted.
1.6 The purpose of the EIA is to establish the nature of the existing Application Site
and its surroundings (i.e. baseline) and the nature of the Proposed Development,
and compare the baseline with the situation once the proposals are in place, so to
identify the likely significant effects that may arise as a result. This requires
consideration of effects during construction, including any demolition or enabling
works, and effects once operational. Information required to be included within an
ES in accordance with Schedule 4 of the EIA Regulations is described in Appendix
B. The document produced as a result of the EIA process is known as the
Environmental Statement (ES).
1.7 The EIA Regulations require that any Proposed Development falling within the
description of a ‘Schedule 2 Development’ within the meaning of the Regulations,
may be subject to an EIA where such development is likely to have ‘significant’
effects on the environment by virtue of factors such as its nature, size or location
(Regulation 2b).
1.8 The proposed development is defined as an urban development project under
Column 1 of Schedule 2 10 b); the development includes more than 150 dwellings
and; the overall area of the development exceeds the 5-hectare threshold, under
Column 2. The proposal therefore requires screening by the Local Planning
Authority to determine whether significant effects are likely and hence whether EIA
is required.
1.9 Having regard to the Application Site and the nature of the Proposed Development,
in the context of the above it is considered the proposals may lead to likely
significant effects on the environment. The applicant therefore intends to submit an
ES in support of a future planning application, the content or ‘scope’ of which is set
out and discussed throughout this document.
Purpose of the Scoping Report
Gallagher Estates and Davidsons Group Overstone Green Environmental Impact Assessment Scoping Report
JUNE 2018 | KT | P17-1499 Page | 4
1.10 This Scoping Report has been prepared to accompany a formal EIA Scoping
Request under Regulation 15 of the Town and Country Planning (EIA) Regulations
2017. The purpose of the Scoping Request is to seek a formal view from Daventry
District Council (and other consultees where relevant) on the information to be
contained within the Environmental Statement (ES) which will accompany a
forthcoming planning application on the above Application Site.
1.11 In accordance with Regulation 15 of the EIA Regulations 2017, paragraph 2, this
Scoping Report contains:
• “A plan sufficient to identify the land;
• A brief description of the nature and purpose of the development on the
environment;
• An explanation of the likely significant effects of the development on the
environment; and
• Such other information or representations as the person making the request
may wish to provide or make.”
1.12 Specifically, this Scoping Report sets out the views of the Applicant, as to the
proposed scope of the environmental issues to be considered in the EIA and as to
the method by which assessment will be undertaken. In particular, this scoping
report reviews existing data and identifies sensitive receptors as far as can be
identified at this stage, so to determine an appropriate scope.
1.13 We welcome comment on the proposed scope and contents of the ES from the
local planning authorities and it is anticipated that they will invite statutory and
other consultees that they wish to nominate to also comment, in accordance with
Regulation 15. It is considered that these consultees are likely to include:
• Environment Agency
• Natural England
• Highways England
• Heritage England
• Local Authority departments such as Environmental Health
1.14 This consultation will also include any other consultation bodies that the Planning
Authorities nominate.
Gallagher Estates and Davidsons Group Overstone Green Environmental Impact Assessment Scoping Report
JUNE 2018 | KT | P17-1499 Page | 5
1.15 It is requested that the Applicant is informed of those consultees which are notified
of this Scoping Request.
Structure of Report
1.16 The remainder of this EIA Scoping Report is divided into the following Sections:
Section 2: The Application Site and Project Overview
An overview of the Application Site and the Proposed Development.
Section 3: Legislative Requirements and the EIA Process
A summary of the relevant EIA legislation and EIA process which
will be undertaken.
Section 4: Proposed Scope of the Environmental Statement (ES)
Individual discussions on each topic to be assessed within the ES,
including information regarding specific methodology.
Section 5: Topics proposed to be Scoped Out of the ES
Each environmental topic not proposed to be considered in the ES
is discussed in turn.
Section 6: Structure of the ES
The structure and format of the ES document is outlined.
Gallagher Estates and Davidsons Group Overstone Green Environmental Impact Assessment Scoping Report
JUNE 2018 | KT | P17-1499 Page | 6
2 The Application Site and Project Overview
Application Site
Background
2.1 The Application Site forms part of the Northampton North Sustainable Urban
Extension (SUE) allocation under Policy N3 of the West Northamptonshire Joint
Core Strategy (December 2014). This allocation makes provision for the
development of circa 3,500 dwellings; primary school provision; 10ha of land
providing local employment opportunities; at least one local centre including small
scale retail facilities and community and healthcare facilities; and provision of a
local multi-modal interchange alongside integrated transport, greenspace and sport
and leisure provision.
2.2 Land forming the southern part of the allocation (Overstone Leys) was granted
outline planning permission on 27th August 2015 for 2,000 houses (with access,
appearance, layout and scale unreserved for the first phase of development,
comprising 200 dwellings), alongside a new local centre, foodstore, a new section
of the A43 dual carriageway, public house, care home, day nursery, medical
centre, retail units, light industry, primary school, public open space and
associated landscaping and infrastructure (Ref. DA/2013/0850).
2.3 The subject application will represent the balance of the SUE allocation, proposing
the remaining dwellings and associated infrastructure.
Site Setting
2.4 The site extends to approximately 79.5 hectares of farmland extending north-east
from Northampton set between the A43 Kettering Road to the north and
Cowpasture Spinney to the south.
2.5 The site comprises 8no. medium scale geometrically shaped arable fields defined
by native boundary hedgerows and intermittent tree cover.
2.6 Beyond the land-use and associated framework of boundary hedgerows and trees
there is a small collection of farm buildings located towards the northern boundary
of the site that are accessed from Kettering Road via an unmade track. An
overhead electricity line with associated pylons crosses the site from the south-
west to the north-east.
Gallagher Estates and Davidsons Group Overstone Green Environmental Impact Assessment Scoping Report
JUNE 2018 | KT | P17-1499 Page | 7
2.7 Beyond the site, local settlement includes the immediately adjoining committed
NNSUE to the south that affords outline planning permission, to the south-east the
linear settlements of Overstone and Sywell, and to the west the larger settlement
of Moulton.
2.8 Wider land uses that are distinct from the otherwise farmed landscape and urban
setting of Northampton include Overstone Park and Golf Course to the south,
Overstone Lakes Holiday Park also to the south, Sywell Reservoir and Sywell
Country Park to the south-east, and Sywell Aerodrome with associated commercial
development to the north-east.
2.9 The site is crossed by public footpath DG2 that connects between Rectory Farm to
the north-west of the site and Sywell Road at Overstone to the south. Footpath
DG1 runs alongside the south-west boundary of the site. Footpath DG3 runs
between Overstone Grange and Moulton on the northside of Kettering Road, and
footpath DG4 provides a short section of path connecting Overstone Grange with
Kettering Road. To the Northamptonshire Round recreation route passes to the
east of the site from Sywell Reservoir heading north to Sywell Wood then west to
Halcot and Pitsford Reservoir. The site itself is maintained as private farmland and
does not provide any public access beyond the designated rights of way.
2.10 The Application Site boundary and context is identified on a figure provided at
Appendix A.
Proposed Development
2.11 The Proposed Development comprises residential development of circa 1,600
dwellings, up to 3 hectares of employment land (including a local centre), a
primary school and associated infrastructure. It is proposed that access to the site
will be obtained via a new roundabout junction onto the A43 Overstone Road.
Gallagher Estates and Davidsons Group Overstone Green Environmental Impact Assessment Scoping Report
JUNE 2018 | KT | P17-1499 Page | 8
3 Legislative Requirements and the EIA Process
Legislative Requirements
3.1 The EIA process will be undertaken in accordance with the requirements of the
Town and Country Planning (Environmental Impact Assessment) Regulations 2017,
which are referred to in this document as the ‘EIA Regulations’. Specifically,
Schedule 4 (Regulation 18 (3)), sets out the information for inclusion in ESs, as
replicated within Appendix B and summarised as follows:
Part 1:
• ‘A description of the development’ - including information on the location of
the development, the physical characteristics of the development, the main
characteristics of the operational phase, and estimate of expected residues
and emissions.
Part 2:
• ‘A description of the reasonable alternatives studied by the developer’ – for
example with regard to development design, technology, location, size and
scale, and an indication of the main reason for selecting the chosen option.
Part 3:
• ‘A description of the relevant aspects of the current state of the environment
(baseline scenario)’- including how the baseline might evolve if the
development were not to proceed.
Part 4:
• ‘A description of the factors specified in regulation 4(2) likely to be
significantly affected by the development’ – including with regard to
population, human health, biodiversity (for example fauna and flora), land
(for example land take), soil (for example organic matter, erosion,
compaction, sealing), water (for example hydromorphological changes,
quantity and quality), air, climate (for example greenhouse gas emissions,
impacts relevant to adaptation), material assets, cultural heritage, including
architectural and archaeological aspects, and landscape.
Part 5:
• ‘A description of the likely significant effects of the development on the
environment’ - including with regard to: construction, existence and
demolition works, the use of natural resources, emission of pollutants and
the disposal of waste, the risks to human helath, cultural heritage or the
environment (for example due to accidents or disasters), cumulative effects
Gallagher Estates and Davidsons Group Overstone Green Environmental Impact Assessment Scoping Report
JUNE 2018 | KT | P17-1499 Page | 9
with other developments, vulnerability with respect to climate change and
the technologies and substances to be used.
• The description of the likely significant effects should cover ‘direct effects
and any indirect, secondary, cumulative, transboundary, short-term,
medium-term and long-term, permanent and temporary, positive and
negative effects of the development’
Part 6:
• ‘A description of the forecasting methods or evidence, used to identify and
assess the significant effects on the environment’ - including details of
difficulties (technical deficiencies or lack of knowledge) encountered
compiling the required information and the main uncertainties involved.
Part 7:
• ‘A description of the measures envisaged to avoid, prevent, reduce or, if
possible, offset any identified significant adverse effects on the environment’
- including where appropriate with regard to: any proposed monitoring
arrangements (for example the preparation of a postproject analysis).
• The description should explain the ‘extent, to which significant adverse
effects on the environment are avoided, prevented, reduced or offset’, and
should cover both the construction and operational phases.
Part 8:
• ‘A description of the expected significant adverse effects of the development
on the environment deriving from the vulnerability of the development to
risks of major accidents and/or disasters which are relevant to the project
concerned’. Where appropriate, this description should include measures
envisaged to prevent or mitigate the significant adverse effects of such
events on the environment and details of the preparedness for and proposed
response to such emergencies.
Part 9:
• ‘A non-technical summary of the information provided under paragraphs 1 to
8’.
Part 10:
• ‘A reference list detailing the sources used for the descriptions and
assessments included in the environmental statement’.
The EIA Process
3.2 Each of the topic areas ‘scoped in’ the EIA, will undergo the following main steps:
Gallagher Estates and Davidsons Group Overstone Green Environmental Impact Assessment Scoping Report
JUNE 2018 | KT | P17-1499 Page | 10
Baseline Studies
3.3 In the case of many of the environmental topics which will be covered in the ES, or
which are proposed to scoped-out of the ES, baseline studies have already been
undertaken, and details of this work, where relevant, are discussed within each
environmental topic within this Report. Baseline conditions will be established
within each of the individual environmental assessments through the use of a
number of sources including, desk top review of existing available data; site
specific survey work; and consultation.
Assessment of Environmental Effects and Evaluation of Significance
3.4 The EIA Regulations require that the ES identifies ‘likely significant effects of the
Proposed Development on the environment’. It is recognised in the EIA Regulations
however that not all environmental effects are significant.
3.5 The evaluation and determination of significant effects will be carried out using
specific criteria defined within each of the technical chapters of the ES. Where
available, published standards and guidelines will be used as the basis for the
significance criteria, along with professional judgement.
3.6 The proposed methodologies for individual environmental topics are discussed in
the subsequent section. However, in many disciplines the following basic approach
is utilised:
• The sensitivity of the receiving environmental receptor is evaluated using
defined criteria.
• The nature of the impact is established in terms of its duration, extent,
frequency, likelihood of occurrence, reversibility, and compliance with
recognised standards;
• The magnitude of the impact is determined. The magnitude of change is a
consideration of how much the impact alters the baseline condition.
• The significance of the effect is determined by cross referencing the
sensitivity of the receptor with the magnitude of change on the receptor.
3.7 It should be noted that environmental effects may be direct or indirect, secondary,
cumulative, transboundary, short, medium, long-term, permanent and temporary,
positive and negative effects of the development and this will be noted in the ES.
Effects will be considered both during the construction phase, when the
Gallagher Estates and Davidsons Group Overstone Green Environmental Impact Assessment Scoping Report
JUNE 2018 | KT | P17-1499 Page | 11
development is being built (often temporary effects) and following completion of
the development (often permanent effects). Given the nature and intended
longevity of the Proposed Development’s operational life, decommissioning is not
appropriate to consider. Accordingly, the ES will focus on the potential likely
significant effects during the construction and operational phases only.
Consideration will however be given to effects from major accidents and disasters
where relevant.
Mitigation Measures and Residual Effects
3.8 Following the assessment of effects, mitigation measures to reduce and avoid
these effects will be identified and detailed. Mitigation measures considered may
include modification of the proposals, integral mitigation, or secondary measures.
Any residual effects following the implementation of mitigation measures will be
determined accordingly. The residual effects represent the overall likely significant
effect of the Proposed Development on the environment having taken account of
practicable/ available mitigation measures.
Cumulative and In-combination Effects
3.9 The ES will respond to the requirement in the Regulations to assess the cumulative
effects of the Proposed Development which will specifically consider two types of
effect:
• Intra-project Cumulative Effects: The combined effect of individual effects
(for example noise, airborne dust or traffic) on a single receptor where
deemed potentially significant; and
• Inter-project Cumulative Effects: The combined effects of development
schemes which may, on an individual basis be insignificant but,
cumulatively, have significant effect.
3.10 With respect to inter-project cumulative effects, the Regulations state that
consideration should be given to “other existing and/ or approved projects”
(Schedule 4, 5e). This is further supported by the National Planning Policy
Guidance (NPPG) which states “There are occasions...when other existing or
approved development may be relevant in determining whether significant effects
are likely as a consequence of a proposed development.” (Paragraph: 024
Reference ID: 4-024-20170728)
Gallagher Estates and Davidsons Group Overstone Green Environmental Impact Assessment Scoping Report
JUNE 2018 | KT | P17-1499 Page | 12
3.11 Regard will therefore be had to “existing and/ or approved projects”, which
alongside the development of the proposals at the Application Site, could
potentially result in cumulative significant effects. From review, this is considered
to include the following, however we would welcome confirmation that this list
includes all necessary schemes deemed relevant to consider:
• Overstone Leys – Hybrid planning application for up to 2,000 dwellings,
including a new local centre, foodstore (up to 2,000m), a new section of
the A43 dual carriageway, public house (up to 600 sqm), care home, day
nursery, medical centre, retail units, light industry, primary school, public
open space and associated landscaping and infrastructure – Application
Ref. DA/2013/0850 (approved 27th August 2015).
• Land off Sandy Hill Lane - Outline application for up to 85 dwellings,
including affordable housing, access and associated works, open space and
healthcare facility – Application Ref. DA/2013/0686 (approved 27th August
2015).
3.12 The following committed highway schemes will also be factored into an assessment
of cumulative effects:
• Duelling of the A43 north of the Round Spinney Roundabout – An
off-line construction of a realigned A43 dual carriageway between the
Round Spinney Roundabout and the relocated a43/ Overstone road/
Overstone Lane junction, plus continuation of the A43 duelling programme
to extend up to and including the roundabout at Sywell Road/ Holcot Lane.
• A43 Roundabout Junction with Overstone Leys – to south of
application site, implemented to provide Overstone Leys access and
southern Overstone Green access.
3.13 Whilst this report has identified the above schemes, it is to be acknowledged that
the extent to which schemes need to be considered within each environmental
discipline will inevitably vary. We welcome confirmation on the above proposed
approach from the local authority.
Preparation of the ES
Gallagher Estates and Davidsons Group Overstone Green Environmental Impact Assessment Scoping Report
JUNE 2018 | KT | P17-1499 Page | 13
3.14 In accordance with the Regulations, the ES will be prepared by “competent
experts”, as listed at the outset of this report. A statement outlining the relevant
experience of the experts who have undertaken the assessment and drafted the
technical chapters within the ES will be provided. It is also noted the 2017
Regulations now require decision makers to ensure they have ‘necessary skills in
house’.
Gallagher Estates and Davidsons Group Overstone Green Environmental Impact Assessment Scoping Report
JUNE 2018 | KT | P17-1499 Page | 14
4 Proposed Scope of The EIA and Environmental Statement Chapters
Environmental Topics
4.1 Table 4.1 lists the environmental topics specified within the EIA Regulations as to
potential be considered as part of the EIA process. The table also summarises
whether these topics are considered relevant to include within the EIA process, and
where such topics will be considered within the ES where applicable. Where a topic
has been scoped out, the reasoning is provided.
Table 4.1: Environmental Topics as per EIA Regulations
EIA Topic Scoped In / Out Where addressed/Reason for
Scoping Out
Population Scoped in To be assessed within the Socio-
economics chapter
Human Health Scoped in To be assessed within various
chapters, including Air Quality, Noise
Environment, Ground Conditions and
Contamination
Biodiversity Scoped in To be assessed within the Ecology
chapter
Land Scoped in To be assessed within the Ground
Conditions and Contamination
chapter
Soil Scoped in To be assessed within the Ground
Conditions and Contamination
chapter
Water Scoped in To be assessed in the Flood Risk and
Drainage chapter, and Ecology
chapter where necessary
Air Scoped in To be assessed within the Air Quality
chapter
Climate Scoped in To be assessed within various
chapters including Air Quality,
Drainage & Flood Risk
Material Assets Scoped out It is not considered there are any
further ‘material assets’ to those
already addressed within other EIA
topics
Cultural Heritage Scoped in To be assessed within with the
Cultural Heritage chapter
Landscape Scoped in To be assessed in the Landscape and
Visual chapter
Interelationship
between above
factors
Scoped in Within each topic chapter under the
heading Cumulative and Interactive
Effects
4.2 In the context of the above environmental topics, it is proposed that the resultant
ES will include the following chapters.
Gallagher Estates and Davidsons Group Overstone Green Environmental Impact Assessment Scoping Report
JUNE 2018 | KT | P17-1499 Page | 15
• Introduction
• EIA Scope and Methodology
• Application Site
• Proposed Development and Alternatives
• Landscape and Visual Issues
• Ecology
• Archaeology and Built Heritage
• Transportation and Access
• Air Quality
• Noise and Vibration
• Flood Risk and Drainage
• Ground Conditions and Contamination
• Socio-Economics
• Summary
4.3 The proposed scope of these individual chapters is discussed below.
Introduction
4.4 This chapter of the ES will provide an introduction to the document and present
details of the ES’s structure and context, in addition to how consultees and
members of the public can comment on the document or obtain addition copies.
EIA Scope and Methodology
4.5 This chapter provides a summary of the agreed scope of assessments to be
considered within the ES, with reference to consultation responses and explains the
methodology used to prepare the technical chapters, including reference to the
general approach in determining significance. Information in relation to cumulative
impacts is also set out within this chapter, along with any limitations or
assumptions used throughout the ES.
Application Site
4.6 This chapter will describe the Application Site’s location, context, existing use and
features.
Proposed Development and Alternatives
Gallagher Estates and Davidsons Group Overstone Green Environmental Impact Assessment Scoping Report
JUNE 2018 | KT | P17-1499 Page | 16
4.7 This chapter will provide a comprehensive description of the Proposed
Development, including any relevant details on assumed timescales and phasing.
Development Parameters will be established and assessed alongside the
description.
4.8 The chapter will also provide a description of the reasonable alternatives (for
example in terms of development design, technology, location, size and scale)
studied by the developer, which are relevant, and an indication of the main reasons
for selecting the chosen option, including a comparison of the environmental
effects.
Landscape and Visual
Introduction
4.9 This chapter will consider the effects of the Proposed Development on landscape
character and visual amenity. The full ‘Landscape Scoping Report’ can be found at
Appendix C.
Relevant Policy and Guidance
4.10 In the production of the LVIA the following documents and information will be
considered:
• National Planning Policy Framework 2012 (NPPF);
• National Planning Policy Framework (Draft) 2018 (Draft NPPF);
• Daventry District Local Plan (June 1997) Saved September 2007 (Local
Plan);
• West Northamptonshire Joint Core Strategy Local Plan (Part 1) adopted
December 2014 (JCT);
• Natural England Character of England – NCA 89 Northamptonshire Vales;
• Northamptonshire Current Landscape Character Assessment November
2006, and Current Landscape Character Strategy and Guidelines;
• Daventry Landscape Character Assessment 2017;
Gallagher Estates and Davidsons Group Overstone Green Environmental Impact Assessment Scoping Report
JUNE 2018 | KT | P17-1499 Page | 17
• Northampton Landscape Sensitivity and Green Infrastructure Study 2009
(NLGS)
• British Listed Buildings online resource:
(http://www.britishlistedbuildings.co.uk/map);
• Historic England National Heritage List for England:
(https://historicengland.org.uk/listing/the-list);
• Ordnance Survey information Explorer 1:20,000 and Street Plus 1:10,000;
and
• Google Maps aerial photography.
4.11 The LVIA methodology is based on the following published guidelines:
• Preparation of Environmental Statements for Planning Projects that require
Environmental Assessment - A Good Practice Guide (1999) DETR London,
The Stationery Office;
• Guidelines for Landscape and Visual Assessment 3rd Edition (2013) the
Landscape Institute and the Institute of Environmental Assessment, E and
FN Spon (GLVIA3);
• An approach to Landscape Character Assessment – Natural England
(2014);
• Photography and photomontage in landscape and visual impact
assessment – The Landscape Institute Advice Note 01/11; and
• Visual representation of development proposals – Technical Guidance Note
02/17 (2017);
Baseline Conditions
4.12 In terms of designations, the site is not covered by any statutory or non-statutory
designation that would prohibit its development in accordance with the Joint Core
Strategy allocation. The site is not covered by any landscape designation that
would suggest an increased value or sensitivity to change. The site is also not
Gallagher Estates and Davidsons Group Overstone Green Environmental Impact Assessment Scoping Report
JUNE 2018 | KT | P17-1499 Page | 18
covered by any functional planning designation that would be compromised by
development.
Landscape Character
4.13 At a national level, the site and its local context are identified as being located
within National Character Area (NCA) 89: Northamptonshire Vales.
4.14 At County Level, The Northamptonshire Current Landscape Character Assessment
identifies the southern half of the site as being located within the Rolling Ironstone
Valley Slopes landscape character type (LCT). More specifically, the southern half
of the site is identified within the Moulton Slopes landscape character area (LCA).
The northern half of the site is identified as being located within the Clay Plateau
LCT. More specifically, the northern half of the site is identified within the Sywell
Plateau LCA.
4.15 At a local level, the site has been considered as part of the Daventry Landscape
Character Assessment 2017. The broad LCT area and more considered LCA areas
in this study broadly replicate those identified in the wider County assessment. In
this assessment the southern part of the site is identified within LCT 4 Rolling
Ironstone Valley Slopes and LCA Area 4b Moulton Slopes (assessed as having a
moderate to weak landscape condition). The assessment sets out a landscape
strategy for this area, but it is focussed primarily on the landscapes of Moulton and
Pitsford, and the potential effects of the proposed Northampton Northern Orbital
Route (NNOR). There is no mention of the allocated Northampton North SUE in the
landscape strategy. The very northern extent of the site is located within LCT 5
Clay Plateau and LCA 5b Sywell Plateau (assessed as having a moderate
condition).
4.16 Also, at local level the Northampton Landscape Sensitivity and Green Infrastructure
Study 2009 (LSGI) considered the setting of the site and its associated landscape
sensitivity. The site is identified as being within an area of high-moderate
sensitivity, an assessment similar to much of the wider rural landscape surrounding
Northampton.
4.17 The assessment of landscape effects will consider the findings of these studies
alongside a more detailed assessment of the immediate character of the site. As
part of this study a landscape strategy will be formulated taking into consideration
Gallagher Estates and Davidsons Group Overstone Green Environmental Impact Assessment Scoping Report
JUNE 2018 | KT | P17-1499 Page | 19
primary mitigation measures that will include the type, scale, appearance and
siting of the proposed development and its associated open spaces, and secondary
mitigation measures in the form of structural planting, planting character, and
landscape management. Then assessment will consider the likely effects arising
from the construction process, the operation scheme, and long-term effects (year
15).
Visual Setting
4.18 A Zone of Theoretical Visibility (ZTV) plan has been produced as part of the
landscape scoping report. The ZTV plan identifies the theoretical visibility of the
site in its existing state as farmland, and the potential visibility of the development
scenario of up to 10m in height above existing ground levels.
4.19 The ZTV model have been produced in accordance with GLVIA3 guidance adopting
a multiple point assessment using a 50m grid across the study area with an
assumed eyelevel of 1.7m above existing ground level. The ZTV adopts a bare
earth scenario (i.e. does not account for the buffering and screening provided by
features such as buildings, woodland, trees, and hedgerows.
4.20 The ZTV provides the starting point for the identification of representative views in
the field that will be the basis for making judgements against the likely visual
effects arising from the development. It is anticipated that the number and location
of representative views will not be dissimilar to those used in the assessment of
visual effects in the Pegasus LVIA.
4.21 The ZTV shows the likely visual envelope of the site and development being
constrained to the north-west by the ridgeline that separates the local landscape
setting of the site from Pitsford Reservoir beyond. The ZTV identifies possible views
from the ridgelines to the east of Brixworth and south of Walgrave.
4.22 To the south the visual envelope will be restricted by the built-up fringes of
Northampton and Moulton, and further to the south-east by the wooded setting of
Overtone Park. To the eats the ZTV identifies possible views from the ridgelines to
the east and west of Mears Ashby, and to the south-east the fringes of Earls
Barton. In reality these views are likely to be heavily restricted by intervening
vegetation cover.
Gallagher Estates and Davidsons Group Overstone Green Environmental Impact Assessment Scoping Report
JUNE 2018 | KT | P17-1499 Page | 20
4.23 To the north and north-east the visual envelope of the site is contained by the local
setting of landform. In reality this will be further reinforced by the large woodland
blocks of Sywell Wood and Hardwick Wood.
4.24 Representative views will be taken from public rights of way, the public highway,
and public access land and assessed against the methodology set out in this
report.
Scope and Methodology of Assessment
Assessment Approach
4.25 The approach to this LVIA comprises the following stages:
• Determining the scope of the assessment;
• A summary of the relevant national and local planning policy, along with
supporting supplementary planning guidance;
• The detailed consideration of the landscape and visual baseline conditions
of the site that includes the identification of key resources and receptors
through a combination of the desktop and research and field based survey
work. This in turn results in the determination of value;
• The description of the development proposals;
• The determination of the susceptibility of each land and visual receptors
that is then combined with the judgement of value to make an overall
assessment of sensitivity.
• The determination of the likely magnitude of change experience by each
receptor;
• The assessment of the likely landscape and visual effects of the proposed
development when assessed against the baseline of the approved
development;
• The identification of measures that seek to avoid, remedy or compensate
any likely significant adverse effects (mitigation measures);
Gallagher Estates and Davidsons Group Overstone Green Environmental Impact Assessment Scoping Report
JUNE 2018 | KT | P17-1499 Page | 21
• The subsequent reassessment of any residual effects of development
specifically highlighting any remaining significant effects; and
• The consideration of any cumulative effect arising from developments in
the locality of the site likely to further influence any change on the
landscape and visual resource within the study area.
4.26 The assessment of landscape and visual effects is set out as a series of transparent
and balanced professional judgements that follow three specific stages:
• The evaluation of the sensitivity of the landscape and visual receptors.
This process considers both the susceptibility of the receptor to the
proposed change and the perceived value of each receptor;
• The identification of the extent of physical change to the existing
landscape resource, to landscape character, and to the visual setting of
the site; and
• The combined assessment of the nature of receptor (sensitivity) and the
nature of the proposed change (magnitude) resulting in a professionally
informed judgement as to the significance of any likely impacts.
Scoping and Consultation
4.27 The following information has been provided for agreement with Daventry District
Council (DDC);
• LVIA methodology;
• Zone of Theoretical Visibility (ZTV) setting out the baseline ZTV for the
site, and the ZTV for a development parameter of up to 10m in height;
and
• Broad distribution and location of representative view.
4.28 Further details are set out in the ‘Landscape Scoping Report’.
Assessment of Landscape Effects
Gallagher Estates and Davidsons Group Overstone Green Environmental Impact Assessment Scoping Report
JUNE 2018 | KT | P17-1499 Page | 22
4.29 The initial stage of the assessment of landscape effect is to determine the
susceptibility of the receptor to the proposed change, and an overall assessment of
landscape sensitivity.
4.30 The combined judgements on the nature of the receptor (sensitivity) and the
nature of the impact (magnitude) are combined to arrive at a clear and transparent
judgement of significance. The significance of landscape effects are described in
the assessment text and are guided by the matrix set out below:
MATRIX OF LANDSCAPE SIGNIFICANCE
Magnitude
of Change
Sensitivity
Very High High Medium Low
High Major Major Major-
Moderate
Moderate
Medium Major-
Moderate
Major-
Moderate
Moderate Minor
Low Moderate Moderate Minor Minimal
Negligible Minor Minor Minimal Minimal
4.31 For the purpose of this assessment, effects that are of major and major-moderate
significance (shaded grey in the table) are those considered particularly relevant to
the planning decision making process.
Assessment of Visual Effects
4.32 The initial stage of the assessment of visual effect is to determine the susceptibility
of the receptor to the proposed change, and an overall assessment of landscape
sensitivity.
4.33 The combined judgements on the nature of the receptor (sensitivity) and the
nature of the impact (magnitude) are combined to arrive at a clear and transparent
judgement of significance. The significance of visual effects are described in the
assessment text and are guided by the matrix set out below:
Gallagher Estates and Davidsons Group Overstone Green Environmental Impact Assessment Scoping Report
JUNE 2018 | KT | P17-1499 Page | 23
MATRIX OF SIGNIFICANCE
Magnitude
of Change
Sensitivity
Very High High Medium Low
High Major Major Major-
Moderate
Moderate
Medium Major-
Moderate
Major-
Moderate
Moderate Minor
Low Moderate Moderate Minor Minimal
Negligible Minor Minor Minimal Minimal
4.34 For the purpose of this assessment, effects that are of major and major-moderate
significance (shaded grey in the table) are those considered particularly relevant to
the planning decision making process.
Criteria of Other Factors Assessed
4.35 The LVIA will also considers the following aspects;
• Directs and indirect effects – direct effect effects are those directly
attributable to the development. These include changes to features,
character, and views. Indirect effects are those resulting indirectly from
the development. These affects may result as a consequence of direct
effects over distance from the site, or a sequence of change over time or
distance;
• Seasonal variation – due to the role that vegetation can play in
preventing or limiting views, or influencing the character of the landscape,
the difference between winter and summer needs to be considered. This is
considered by assessing winter views (in the first year following
completion) and in summer (after 15 years);
• Beneficial, neutral, or adverse effects - adverse effects are those that
would be damaging to the quality, integrity, or key characteristics of the
Gallagher Estates and Davidsons Group Overstone Green Environmental Impact Assessment Scoping Report
JUNE 2018 | KT | P17-1499 Page | 24
landscape and/or visual resource. Beneficial effects are those that would
result in an improvement in the quality, integrity, or key characteristics of
the landscape and/or visual resource. Neutral effects are those effect that
would maintain, on balance, the existing levels of quality, integrity, or key
characteristics of the landscape and/or visual resource.
Ecology
Introduction
4.36 This chapter of the ES will consider the likely significant ecological effects relating
to the Proposed Development. Likely significant effects on habitats and species
may arise directly from the uses provided both during the construction and
following the completion of the Proposed Development. The ecological technical
note ‘Ecology Input into ES Scoping’ can be found at Appendix D.
Relevant Policy and Guidance
4.37 Key ecology legislation, policy and professional best-practice guidance will inform
and guide the assessment works, notably including:
• The Conservation of Habitats and Species Regulations, 2010 (as amended)
• The Wildlife and Countryside Act, 1981 (as amended)
• The Countryside and Rights of Way Act, 2000
• The Natural Environment and Rural Communities Act, 2006;
• Town and Country Planning (Environmental Impact Assessment)
Regulations, 2011;
• The Hedgerows Regulations, 1997;
• The Protection of Badgers Act, 1992;
• The Wild Mammals (Protection) Act, 1996
• National Planning Policy Framework (NPPF); and
Gallagher Estates and Davidsons Group Overstone Green Environmental Impact Assessment Scoping Report
JUNE 2018 | KT | P17-1499 Page | 25
• CIEEM ‘Guidelines for Ecological Impact Assessment in the United
Kingdom’ (CIEEM, 2016).
Baseline Conditions
4.38 The site has been subject to a desktop study and an extended Phase Habitat
Survey in March 2018 in order to ascertain the general ecological value of the land
contained within the boundaries of the site and to identify the main habitats and
ecological features present. The site was surveyed based on standard Phase 1
Habitat Survey methodology, and extended, in line with the Guidelines for
Preliminary Ecological Appraisal.
4.39 In terms of designations, no statutory designations have been identified within or
adjacent to the site. The nearest statutory designation to the site is Crowfields
Common Local Nature Reserve, located approximately 1.4km from the site, whilst
the nearest European-level designation is the Upper Nene Valley Gravel Pits
Ramsar and Special Protection Area (SPA), located approximately 7.3km from the
site
4.40 The majority of the site is considered to be of low ecological value, being
dominated by intensively managed arable land. Habitats of elevated value are
present within the site, in the form of hedgerows, trees and the watercourse and
woodland habitats associated with the non-statutory designation, Cowpasture
Spinney Local Wildlife Site (LWS), which is in part located in the east of the site.
4.41 In terms of fauna, the site is considered to provide opportunities for Badger,
roosting bats in buildings and trees, foraging and commuting bats, birds (including
nesting Barn Owl) and reptiles. Specific Phase 2 survey work is therefore proposed
to be undertaken at the site this year during the appropriate seasonal window and
in line with best practice guidance.
Scope and Methodology of Assessment
Evaluation of Ecological Baseline
4.42 The evaluation of ecological features and resources should be based on sound
professional judgement whilst also drawing on the latest available industry
guidance and research. The approach taken will be based on that described in
‘Guidelines for Ecological Impact Assessment in the UK and Ireland’ published by
Gallagher Estates and Davidsons Group Overstone Green Environmental Impact Assessment Scoping Report
JUNE 2018 | KT | P17-1499 Page | 26
the Chartered Institute of Ecology and Environmental Management (CIEEM) in
2016 whereby important ecological features are identified, and these are
considered within a defined geographical context using the following frame of
reference:
• International;
• National;
• Regional;
• County;
• District;
• Local; or
• Site (not of elevated importance at a local level).
4.43 Features considered to be of importance at the Site level only will be scoped out of
this assessment (with the exception of protected species which are considered in
terms of mitigation and any legislative requirements).
Assessment of Impacts and Significance
4.44 The CIEEM publication ‘Guidelines for Ecological Impact Assessment in the UK and
Ireland’ (2016) also sets out a methodology for the assessment of potential effects
arising from development. These methods are followed which can be summarised
as below.
4.45 Using the agreed parameters of the scheme, likely effects are determined with
reference to aspects of the ecological structure and function on which the feature
or resource depends. This includes factors such as the available resources,
ecological processes, human influences, historical context, ecological relationships,
ecological role or function and ecosystem properties. Based on this context, the
nature of the effect is characterised and considered under the following
parameters:
• Positive or negative – will the activity lead to an adverse, beneficial or
neutral effect;
Gallagher Estates and Davidsons Group Overstone Green Environmental Impact Assessment Scoping Report
JUNE 2018 | KT | P17-1499 Page | 27
• Extent – the size or amount of an impact, the area of habitat or number of
individuals affected;
• Duration – the time for which the impact is expected to last prior to
recovery or replacement, i.e. short-term or long-term;
• Reversibility – an effect may be irreversible in that recovery is not possible
within a reasonable timescale or there is no reasonable chance of action
being taken to reverse it, i.e. permanent or temporary; and
• Timing and frequency – some changes may only cause an impact if they
coincide with critical life-stages or seasons, whilst frequent events may
cause a greater effect than a single event.
4.46 Based on these parameters, the scale of effect (or magnitude) can be summarised
as follows. This is in relation to adverse effects, although a similar scale can be
applied to beneficial effects.
Scale of impact Nature of effect
Substantial A permanent or long-term effect on the receptor, which may result in severe damage to key characteristics and implications for the integrity of the receptor or its conservation status.
Moderate Impacts resulting in partial loss of or damage to a receptor, which could have implications for the integrity of the receptor or its conservation status.
Slight Short-term or temporary impacts resulting in only minor loss of or damage to a receptor, unlikely to have implications for the integrity of the receptor or its conservation status.
Negligible No effect or only a short-term reversible impact with no long-term effect on the receptor.
4.47 Based on the nature of the effect, an assessment is then made on whether the
effect on a habitat or species is likely to be ecologically ‘significant’. CIEEM
guidance defines a ‘significant effect’ as “an effect that either support or
undermines biodiversity conservation objectives for ‘important ecological features’
or for biodiversity in general”, going on to state that “significant effects encompass
impacts on structure and function of defined sites, habitats or ecosystems and the
conservation status of habitats and species (including extent, abundance and
distribution).”
Gallagher Estates and Davidsons Group Overstone Green Environmental Impact Assessment Scoping Report
JUNE 2018 | KT | P17-1499 Page | 28
4.48 Significance is also assessed at an appropriate geographic scale. For example, a
significant effect on a Site of Special Scientific interest (SSSI) would be of national
significance. Notwithstanding this however, consideration is also given to whether
an effect is significant at a scale below the geographic context in which the feature
is considered important.
4.49 For some ecological features (notably designations), there may be an existing
statement of the conservation status of a feature and objectives and targets
against which the effect can be judged. For example, Sites of Special Scientific
Interest (SSSI) are assessed under six condition categories, namely favourable,
unfavourable recovering, unfavourable no change, unfavourable declining, part
destroyed, and destroyed. An effect that exerts a change between these condition
categories would be considered as significant.
4.50 Where no existing statement of conservation status is available, an assessment is
made against the existing status and condition of the habitat or species population,
as recorded by survey data and background information, taking into account the
level of ecological resilience or existing conditions that a habitat or species is
currently subject to. An effect resulting in a long-term change to the existing
background population trend or status at a given geographical level would be
considered as significant. In this regard, a significant beneficial impact could be
defined as one that prevents or slows an existing decline in the favourable
conservation status of a habitat or population as much as one that permitted a
population or habitat area to increase.
4.51 The likelihood or uncertainty of an effect occurring as predicted is also considered.
To assist with defining certainty, the following scale is used (with broad confidence
levels indicated):
• Certain/near-certain - probability estimated at 95% chance or higher;
• Probable - probability estimated above 50% but below 95%;
• Unlikely - probability estimated above 5% but less than 50%; or
• Extremely unlikely - probability estimated at less than 5%.
Cultural Heritage
Gallagher Estates and Davidsons Group Overstone Green Environmental Impact Assessment Scoping Report
JUNE 2018 | KT | P17-1499 Page | 29
Introduction
4.52 This section of the Scoping Report addresses the potential for significant effects on
heritage assets including the archaeological resource and built heritage.
Relevant Policy and Guidance
4.53 Key heritage statute, policy and professional guidance will inform and guide the
assessment works, notably including:
• The 1979 Ancient Monuments and Archaeological Areas Act 1979;
• The Planning (Listed buildings and Conservation Areas) Act 1990;
• The National Planning Policy Framework;
• The National Planning Practice Guide;
• ‘Conservation Principles’ (English Heritage 2008);
• Historic England 2015 ‘Managing Significance in Decision-Taking in the
Historic Environment: Historic Environment Good Practice Advice in Planning
2’
• Historic England 2015 ‘The Setting of Heritage Assets’ (Historic Environment
Good Practice Advice in Planning: 3); and
• Chartered Institute for Archaeologists professional guidelines.
Baseline Conditions
Archaeology
4.54 The archaeological potential of the site has previously been considered with
reference to Northamptonshire Historic Environments Record, as well as through
the completion of a detailed magnetometry geophysical survey which covered all
areas of the site suitable for survey, and further land to the north-east.
4.55 The following sites have been identified within the site:
• Geophysical survey anomalies and cropmarks (MNN874, 119533, 119534,
119535) indicating the presence of two enclosures and a roundhouse
gulley in conjunction with other possible features such as pits in the
southern corner of the site. This has been interpreted as a small
unenclosed settlement of Iron Age or Roman date, and unstratified
Roman-British finds have been found in this area (MNN27212). Prehistoric
Gallagher Estates and Davidsons Group Overstone Green Environmental Impact Assessment Scoping Report
JUNE 2018 | KT | P17-1499 Page | 30
funerary activity and undated industrial activity was recorded close to this
area, to the south of the site (MNN1161274, MNN873).
• To the north-east of the first site, also in the southern area of the site,
geophysical survey anomalies suggested the presence of a boundary ditch
with an enclosure to one site. This has also been interpreted as being of
Iron Age or Roman date.
• A large sub-rectangular enclosure was recorded in the geophysical survey
in the north-eastern corner of the site. Prehistoric flintwork has previously
been recorded in this area (MNN21333). This has been interpreted as
prehistoric or Roman in date. Cropmarks had previously been recorded in
this area, but the description does not match well with the anomalies
recorded (MNN21334).
• Two other groups of anomalies indicating possible ditches were recorded in
the central eastern area of the site during the geophysical survey.
4.56 No likely archaeological anomalies were recorded in the area of a third recorded
cropmark site (MNN21335, MNN4450).
4.57 Proposed additional assessment works comprise:
• An updated search of data held at Northamptonshire Historic Environments
Record;
• Review of aerial photographs held by Northamptonshire Historic
Environments Record and Historic England;
• Review of documentary and photographic sources held at
Northamptonshire Archives;
• Additional site visit; and
• Trial trenching to investigate the areas of archaeological potential
identified above.
Built Heritage
4.58 Conservation Areas in the vicinity of the site comprise:
Gallagher Estates and Davidsons Group Overstone Green Environmental Impact Assessment Scoping Report
JUNE 2018 | KT | P17-1499 Page | 31
• Moulton, located approximately 1.4km to the south-west of the site.
• Sywell, located over 1km to the east.
4.59 Listed buildings in the vicinity of the site beyond these Conservation Areas include:
• The Farmhouse at Overstone Grange (Grade II);
• Overstone Old Rectory (Grade II);
• Rectory Farmhouse (Grade II);
• Pytchley Gates (Grade II);
• Holly Lodge Farmhouse (Grade II);
• Overstone Gate (Grade II);
• 102, 104, 106, 108 and 110, Sywell Road (Grade II);
• Church of St Nicholas (Grade II); and
• The Rectory, Sywell (Grade II).
4.60 No Registered Parks and Gardens, Scheduled Monuments or Battlefield are present
in the vicinity of the site.
4.61 The setting of the above assets will be considered with reference to the guidance
given in Historic England’s GPA3 The Setting of Heritage Assets (Second Edition)
2017.
Assessment Methodology
Articulating Value (Significance)
4.62 As defined in the NPPF, significance is ’the value of a heritage asset to this and
future generations because of its heritage interest’. Historic England provides
advice on assessing significance and advocates considering four types of heritage
value: evidential, historical, aesthetic and communal. Significance results from a
combination of any, some or all of these values. These four values essentially cover
the heritage ‘interests’ given in the glossary of NPPF, which comprise
archaeological, architectural, artistic and historic interest.
Gallagher Estates and Davidsons Group Overstone Green Environmental Impact Assessment Scoping Report
JUNE 2018 | KT | P17-1499 Page | 32
Setting and Significance
4.63 Setting can contribute to, detract from or be neutral with regards to heritage
values, and so change to setting has the potential to diminish, enhance or leave
unchanged the significance of a heritage asset through change to the value(s).
Levels of Significance
4.64 Significance will be articulated in terms that directly relate to key policy, principally
NPPF. Four levels of significance may be identified:
• Designated heritage assets of the highest significance, as identified in
paragraph 132 of NPPF comprising Grade I and II* Listed buildings; Grade
I and II* Registered Parks and Gardens; Scheduled Monuments; Protected
Wreck Sites and Registered Battlefields (and also including some
Conservation Areas);
• Designated heritage assets of less than the highest significance, as
identified in paragraph 132 of NPPF, comprising Grade II Listed buildings
and Grade II Registered Parks and Gardens (and also some Conservation
Areas);
• Non-designated heritage assets; and
• Sites, buildings or areas which have little or no heritage significance and
thus do not constitute heritage assets.
4.65 Paragraph 139 of NPPF clarifies that ‘Non-designated heritage assets of
archaeological interest that are demonstrably of equivalent significant to scheduled
monuments, should be considered subject to the policies for designated heritage
assets’.
Assessment of significance of effect of development
4.66 The assessment of the significance of effect of development will be articulated in
qualitative terms that directly relate to key policy, principally NPPF. The following
levels of harm may potentially be identified:
• Substantial harm or total loss. It has been clarified in a High Court
Judgement of 2013 that this would be harm that would ‘have such a
Gallagher Estates and Davidsons Group Overstone Green Environmental Impact Assessment Scoping Report
JUNE 2018 | KT | P17-1499 Page | 33
serious impact on the significance of the asset that its significance was
either vitiated altogether or very much reduced’;
• Less than substantial harm. Harm of a lesser level that that defined above;
and
• No harm (preservation). A High Court Judgement of 2014 is relevant to
this, in which it was held that with regard to preserving the setting of
Listed building or preserving the character and appearance of a
Conservation Area, ‘preserving’ means ‘doing no harm’.
4.67 The identification of significant effects in EIA terms will be based on professional
judgement. Substantial harm to a designated heritage asset will be deemed to be a
significant effect. Less than substantial harm to a designated heritage asset, or
substantial harm to a non-designated heritage asset may also represent a
significant effect, determined on the basis of professional judgement. Less than
substantial harm to a non-designated heritage asset does not usually represent a
significant effect in EIA terms.
4.68 Proposed development may also result in benefits to heritage assets, and these will
be articulated in terms of how they enhance the heritage values and hence the
significance of the assets concerned.
Transport and Access
Introduction
4.69 This chapter of the ES will consider the potential effects in the vicinity of the
Application Site which could arise on the transport network and which are
attributable to changes in predicted travel demand associated with the Proposed
Development during both the construction and operational phases.
4.70 Initial consultation has been held with Northamptonshire County Council (NCC)
highways to inform the transportation assessment of the proposals. Further detail
relating to this is outlined below.
Baseline Conditions
Vehicle Links
Gallagher Estates and Davidsons Group Overstone Green Environmental Impact Assessment Scoping Report
JUNE 2018 | KT | P17-1499 Page | 34
4.71 The proposed site is located adjacent to the A43 Kettering Road which runs on a
north south alignment to the western edge of the site. The A43 provides a key link
between Northampton to the south and Kettering approximately 12km north of the
site. In the environs of the proposed site the A43 Kettering Road is single
carriageway and of approximately 7.3m in width (i.e. 3.65m running lanes).
4.72 Presently, vehicular access to the proposed site is provided at three points. Each of
these takes the form of a gated field access, which effectively operate as simple
priority ‘give-way’ junctions. These existing vehicular accesses are located broadly
900m, 1150m and 1450m south of the four-arm roundabout junction between the
A43 Kettering Road, Sywell Road and Holcot Lane.
4.73 The proposed site is well-related to a range of existing and forthcoming facilities
and services in northern Northampton. As the proposed site forms the northern
portion of the NNSUE, it is also located so as to benefit from the range of amenities
that will be delivered within the consented ‘Overstone Leys’ development.
4.74 The accessibility of the proposed site for pedestrians is further enhanced by a
number of Public Rights of Way (PRoW) that run through the surrounding area,
which are discussed below as follows:
• There is a footpath that runs broadly west to east through the site, and
thereafter extends through Cowpasture Spinney to the village of
Overstone
• There is also a footpath that runs along the southern boundary of the
proposed site, effectively bounding the site. This footpath also extends to
the southeast through to the village of Overstone.
• There are also a number of PRoW that extend through the surrounding
countryside, for example to the northwest through to the village of Holcot,
that provide routes for leisure walks.
4.75 Therefore, it is considered that the location of the proposed site presents the
opportunity for journeys, by active modes of travel, to a number of day-to-day
needs.
Cycling
Gallagher Estates and Davidsons Group Overstone Green Environmental Impact Assessment Scoping Report
JUNE 2018 | KT | P17-1499 Page | 35
4.76 Whilst there is no existing cycle-specific infrastructure connecting the proposed site
to the northern edge of Northampton, this is not unexpected given the existing
undeveloped nature of the site.
4.77 Furthermore, as part of the consented ‘Overstone Leys’ development and the A43
Moulton Bypass scheme a number of cycle links will be created, thereby connecting
the proposed site to the existing northern edge of Northampton.
Public Transport
4.78 The closest existing bus stops, located on Sywell Road in Overstone, lie over 1km
from the centre of the site.
4.79 Furthermore, as part of the consented ‘Overstone Leys’ development it is
understood that a comprehensive, sustainable public transport service would be
created to minimise the number of car movements generated by the development.
4.80 Indeed, the TA prepared by PBA in support of the planning application for
‘Overstone Leys’ sets out a bus strategy for the completed development.
4.81 Northampton Railway Station located 9km southwest of the site in central
Northampton offers regular, frequent services towards London (London Euston)
and Birmingham (Birmingham New Street), which allows connection into stations
that sit on the West Coast Main Line and are therefore served by a wider range of
services.
4.82 Table 4.82 below summarises the services that call at Northampton Railway
Station, setting out the approximate frequency and journey time to a selection of
destinations on a typical weekday.
Destination Approximate Journey
Time
Approximate
Frequency
Towards Birmingham
Coventry 35 minutes Every 20 minutes
Birmingham New
Street 65 minutes Every 20 minutes
Towards London
Milton Keynes
Central 15 minutes Every 20 minutes
Watford Junction 45 minutes Every 30 minutes
Gallagher Estates and Davidsons Group Overstone Green Environmental Impact Assessment Scoping Report
JUNE 2018 | KT | P17-1499 Page | 36
London Euston 65 minutes Every 20 minutes
Table 4.82 – Summary of Train Services from Northampton Railway Station
Assessment Methodology
4.83 A detailed Transport Assessment will be submitted with the proposals. Details of
the scope of this Transport Assessment is outlined below.
Access and Parking
4.84 It is proposed that access to the site will be obtained via the A43 Overstone Road.
Appropriate access to the site will therefore be designed which will also consider
the existing dualling provision on this road being delivered to the south as part of
the A43 Moulton Bypass scheme, which has been, in part, facilitated by the nearby
Overstone Leys development proposals.
4.85 Parking will be provided in accordance the guidance as set out with the
Northamptonshire Parking Standard document
Sustainable Modes
4.86 The access strategy proposed will also consider linkages by sustainable modes of
transport both external to the site and within the site itself.
4.87 It is proposed that an accessibility audit be carried out of existing routes to and
from the site. This audit will assess the distances to nearby facilities and will
calculate the associated walking time based on guidance within the “Providing for
Journeys on Foot” document published in 2000 by the Institution of Highways and
Transportation.
4.88 Linkages for pedestrians, cyclists and public transport users will also be reviewed
with strategies put forward to enhance connection where appropriate.
4.89 The masterplan of the site will also be developed to ensure accessibility for
pedestrians and cyclists between the residential units and proposed other uses is
maximised thereby encouraging trips to be retained within the site. In addition, the
residential street network of the final scheme will also be designed to be in
accordance with guidance as outlined within Manual for Streets document
published by the Department for Transport in 2007.
Gallagher Estates and Davidsons Group Overstone Green Environmental Impact Assessment Scoping Report
JUNE 2018 | KT | P17-1499 Page | 37
4.90 A Travel Plan (TP) will also be submitted with the proposals which will provide
details of sustainable transport measures associated with the site. This TP will be
designed to:
• Raise awareness of sustainable travel;
• Reduce reliance on the private car;
• Discourage unnecessary car journeys; and
• Encourage a modal shift towards walking, cycling and public transport.
Traffic Assessment
4.91 It is noted that NCC have identified that any assessment of traffic impact would
need to use the Northampton Strategic Transport Model (NSTM). Further traffic
surveys have therefore been commissioned at the request of NCC to update the
model where this is required. Details of the junctions that will be surveyed are as
follows:
• A43 / Holcot Lane / Sywell Road – Roundabout
• Holcot Lane / Sywell Road – mini Roundabout
• Sywell Road / Wellingborough Road - Priority Junction
• Webbs Lane / Overstone Road / Ecton Lane / Sywell Road – Priority
Crossroads
• New Road Sywell Road – Priority junction
• Sywell Road / Billing Lane / The Avenue / Overstone Lane – Priority
Crossroads
• A43 / New Road / Overstone Lane / Overstone Road – Roundabout
Junction
• Overstone Road / Ashley Lane – Priority Junction
• Billing Lane / Marburg St / Great Billing Way – Roundabout Junction
Gallagher Estates and Davidsons Group Overstone Green Environmental Impact Assessment Scoping Report
JUNE 2018 | KT | P17-1499 Page | 38
4.92 These surveys will be carried out on a neutral weekday outside of the school
holiday period. In addition, queue surveys will also be carried out of each of these
junctions to provide further information to allow NCCs appointed consultants to
revalidate the associated NSTM traffic model.
4.93 In addition, Automatic Traffic Counts will also be carried out at previously agreed
locations to further inform the model.
4.94 The NSTM model already includes for background growth in the area and
associated committed developments as confirmed by NCC. Thus the model
provides a suitable base for the assessed forecast year. The model should also
account for future infrastructure changes in the area such as the aforementioned
Moulton bypass scheme.
4.95 It is noted that details of proposed site access and development mix will be
provided to NCC for inclusion in their NSTM model. The traffic generation of the
proposals will also be based on trip rates agreed in advance with NCC which are
likely to reflect those previously agreed for the Overstone Leys proposal.
4.96 Output from the model will be extracted for the Forecast Year and Forecast Year
with Development scenario and will be used to assess the traffic impact of the
proposals both in terms of percentage impact and vehicle volume where
appropriate. Where a significant increase is deemed to occur further detailed
capacity modelling will be undertaken of these associated junctions using
appropriate industry standard junction modelling software.
4.97 These detailed assessments will be used to assess whether the impact of the
proposals would necessitate junction mitigation measures to be introduced. Details
of these mitigation measures will be provided where appropriate.
Air Quality
Introduction
4.98 An assessment of the potential effects of the Proposed Development on air quality
will be included within the ES. The air quality chapter will consider the key air
quality effects associated with the proposed development. It is anticipated that it
will address the following:
Gallagher Estates and Davidsons Group Overstone Green Environmental Impact Assessment Scoping Report
JUNE 2018 | KT | P17-1499 Page | 39
• the impacts of the construction of the proposed development on dust
soiling and concentrations of PM10 during the construction period;
• the impacts of emissions from road traffic generated by the development
on concentrations of nitrogen dioxide, PM10 and PM2.5 at sensitive
locations along the local road network;
• the impacts of emissions from traffic on the roads adjacent to the
proposed development on the air quality conditions that future residents
will experience; and
• whether any additional mitigation measures will be required to address
any significant air quality effects.
Baseline Conditions
4.99 Baseline conditions in the study area will be determined by collating information
from a number of sources. Industrial and waste management sources that may
affect the area will be identified using Defra’s Pollutant Release and Transfer
Register, as well as through examination of Daventry District Council’s,
Northampton Borough Council’s and Wellingborough District Council’s Air Quality
Review and Assessment reports. Local monitoring data will be taken from all
Councils’ Air Quality Review and Assessment reports and background
concentrations will be defined using the national pollution maps published by
Defra. Where necessary, dispersion modelling will be undertaken to establish
baseline pollutant concentrations. Consideration will be given to the presence of
any Air Quality Management Areas (AQMAs) in the study area.
4.100 Although Daventry District Council has not declared any AQMAs, Northampton
Borough Council has declared seven AQMAs for exceedances of the annual mean
nitrogen dioxide objective. The AQMAs declared by Northampton Borough Council
are shown on the plan overleaf.
4.101 Northampton Borough Council has since adopted a Low Emission Strategy, which
forms part of Northampton Borough Council's Air Quality Action Plan. This sets out
a number of actions to improve air quality within the borough, including promoting
sustainable modes of transport, promoting travel plans, undertaking a Clean Air
Zone (CAZ)/Low Emission Zone (LEZ) feasibility study, promoting the uptake of
ultra-low emission vehicles, adopting Air Quality and Planning Technical Guidance,
Gallagher Estates and Davidsons Group Overstone Green Environmental Impact Assessment Scoping Report
JUNE 2018 | KT | P17-1499 Page | 40
promoting mitigation and providing mechanisms for off-setting mitigation,
developing and implementing the Northampton Electric Vehicle Plan, encouraging
electric vehicle charging within new developments, setting minimum emission
standards for taxis and requiring commercial bus services to meet a minimum of
Euro V emission standards.
Figure 4.101 – Declared AQMAs, Application Site and Local Authority Boundaries
Contains Ordnance Survey data © Crown copyright and database right 2018. Ordnance Survey licence number
100046099. Additional data sourced from third parties, including public sector information licensed under the
Open Government Licence v1.0.
Assessment Scope and Methodology
Policy Context and Assessment Criteria
4.102 A summary of all relevant national and local policy and guidance will be provided.
Any local policies or guidance (e.g. Northampton Borough Council’s Low Emission
Strategy) relating to air quality will also be considered, from both Daventry District
Council and Northampton Borough Council. Relevant air quality standards and
assessment criteria will also be set out.
Construction Dust Assessment
Gallagher Estates and Davidsons Group Overstone Green Environmental Impact Assessment Scoping Report
JUNE 2018 | KT | P17-1499 Page | 41
4.103 Given the size of the development, it is anticipated that a construction dust
assessment will be required as part of the air quality chapter of the ES. The
assessment methodology will follow that set out in the Institute of Air Quality
Management’s Guidance on the Assessment of Dust from Demolition and
Construction. It will identify the potential for dust to be generated and the
sensitivity of the surrounding area and will combine these to determine the risk of
dust impacts without appropriate mitigation. This information will then be used to
determine the appropriate level of mitigation required to ensure that there are no
significant effects.
Road Traffic Emissions Assessment
4.104 The proposed development is located adjacent to the A43, and will generate
additional traffic on the local road network that could affect air quality conditions at
existing roadside receptors, thus it is anticipated that a detailed air quality
assessment will be required, to be presented within the air quality chapter of the
ES.
4.105 Roadside pollutant concentrations, and the impacts of the development-generated
traffic, will be predicted using the ADMS-Roads dispersion model. The model will
be verified against local monitoring data.
4.106 Impacts will be predicted at a number of locations both within, and close to, the
proposed development, including locations in the borough of Northampton and
relevant AQMAs. Receptors will be selected to represent worst-case exposure. For
new residences within the development these will be at the façades of the
properties nearest the road. For existing properties, these will be at the roadside
façade of properties alongside the local road network where the development-
generated traffic increases will be greatest, and at locations where concentrations
are expected to be highest, such as near to junctions. Impacts at any designated
ecological sites close to roads that will see significant increases in traffic (defined
as >1,000 AADT in the Design Manual for Roads and Bridges) as a result of the
proposed development will also be modelled. Specific receptors cannot be selected
at this stage as their selection will depend upon the layout of the scheme and the
changes in traffic flows predicted in the traffic data upon which the assessment will
be based, which are not yet available.
Gallagher Estates and Davidsons Group Overstone Green Environmental Impact Assessment Scoping Report
JUNE 2018 | KT | P17-1499 Page | 42
4.107 The model will be used to predict existing baseline pollutant concentrations and
the likely concentrations in the year of first occupation of any homes within the
development, both without and with the development. If relevant, a sensitivity
test will be applied to consider the potential for elevated real-world nitrogen oxides
emissions from certain diesel vehicles, providing a reasonable worst-case upper-
bound to the assessment.
4.108 The assessment will also take account of cumulative effects from other nearby
schemes.
4.109 If the construction works are anticipated to generate a large volume of traffic on
the local roads then road traffic emissions dispersion modelling will also be
undertaken to determine the impacts of the construction traffic in the first full year
of the construction works. If the construction works will generate significantly less
traffic than the operational development then no such modelling will be required,
as the modelled impacts in the first year of occupation will represent the worst-
case impacts of the scheme in either the construction or operational phase.
Potential for Significant Effects
4.110 The Institute of Air Quality Management’s Guidance on the Assessment of Dust
from Demolition and Construction advises that, with appropriate mitigation in
place, the effects of construction dust will be ‘not significant’. The assessment will
thus focus on determining the appropriate level of mitigation to be applied so as to
ensure that effects will normally be ‘not significant’.
4.111 Once operational, the key air quality effects of the proposed development can be
expected to be related to road traffic emissions. For new receptors within the
proposed development, predicted concentrations will be compared with the
relevant air quality objectives, and any exceedances will necessarily be deemed a
significant adverse effect, without mitigation. Appropriate mitigation will be
identified to ensure that future residents experience acceptable air quality, and
thus that there are no significant effects.
4.112 Predicted concentrations at existing nearby sensitive receptors will be compared
with the relevant air quality objectives and the significance of impacts at individual
receptors will be determined following the Environmental Protection UK and
Institute of Air Quality Management guidance on Planning for Air Quality. The
Gallagher Estates and Davidsons Group Overstone Green Environmental Impact Assessment Scoping Report
JUNE 2018 | KT | P17-1499 Page | 43
overall significance of the air quality effects will then be determined following this
guidance. Where necessary, appropriate financial mitigation will be provided in
accordance with the appropriate emissions contribution calculation as outlined in
the Northampton Low Emission Strategy to ensure that there are no significant
effects.
Noise
Introduction
4.113 A consultation has been carried out with the Environmental Health Department of
Daventry District Council to determine their exact requirements in terms of
acceptable noise assessment criteria and the standards that will be required for the
proposed residential development. This consultation has also agreed the scope,
extent and duration of noise measurements to be carried out. Notwithstanding this
the proposed methodology is set out below.
Baseline Conditions and Assessment Methodology
4.114 It is proposed that a detailed environmental noise survey representative of a 96-
hour period, covering both weekend and weekdays, be undertaken to determine
the existing environmental noise conditions upon which to base the subsequent
assessment. The measurements will be carried out by a Consultant certified as
competent in environmental noise measurement, using instrumentation conforming
to Type 1 Specification, as set out in BS EN 61672: 2003: Electroacoustics. Sound
Level Meters. Part 1 Specifications and in accordance with the principles of BS
7445: 2003: Description and Measurement of Environmental Noise.
Monitoring Procedure
4.115 The agreed methodology for the survey is to gain access to the site in order to
locate and secure two sound level meters, which will record noise levels at the site
boundaries; one overlooking the A43 and one in the southeast corner of the site.
These will remain in-situ for a minimum of 96 hours, where access will be required
again for retrieval. No significant activity will take place, apart from the placement
and securing of a tripod/pole mounted microphones and associated, case contained
logger. These will preferable be safely secured to fences or similar.
Gallagher Estates and Davidsons Group Overstone Green Environmental Impact Assessment Scoping Report
JUNE 2018 | KT | P17-1499 Page | 44
4.116 A number of attended measurements may be undertaken as necessary towards
the centre of the site in order to verify the results of the noise modelling which is
to be carried out. All proposed monitoring positions are described below.
4.117 The surveys require a period of dry and low wind (<5 m/s) in order to provide
usable data.
Monitoring Positions
4.118 It is proposed that the following monitoring be carried out:
• Unattended measurement close to site boundary with A43;
• Unattended measurement in the southeast corner of the site
representative of the noise environment at the NNSR;
• Spot Measurements – Attended measurements as appropriate to
determine noise arising from Holcot Lane and Sywell Aerodrome and
background noise at the nearest noise sensitive receptor
4.119 Exact measurement positions are to be decided on site.
4.120 The following acoustic parameters will be recorded as a minimum:
• LAeq,, T external noise levels;
• LAFmax external noise levels;
• LA90,T external noise levels;
• LA10,T external noise levels.
Survey/ Assessment Basic Methodology
4.121 The survey and assessment will be undertaken in accordance with Daventry
District Council’s guidance. In this regard it is understood that the senior
environmental health officer at Daventry District Council recommended that the
following guidance and standards be considered in relation to the neighbouring
Overstone Leys proposal:
• BS4142: 2014 Method for Rating and Assessing Industrial and Commercial
Sound
Gallagher Estates and Davidsons Group Overstone Green Environmental Impact Assessment Scoping Report
JUNE 2018 | KT | P17-1499 Page | 45
• BS8233: 2014 Guidance on Sound Insulation & Noise Reduction for
Buildings
• BS5228-1:2009 Code of Practice for noise and vibration control on
construction and open sites – Part 1: Noise
• BS5228-2:2009 Code of Practice for noise and vibration control on
construction and open sites – Part 2: Vibration
• Noise Policy Statement for England
• The World Health Organisations Guidelines on Community Noise and Night
Time Noise
• The Calculation of Road Traffic Noise
• The Design Manual for Roads and Bridges
• Professional Practice Guidance on Planning and Noise, & PRoPG
Supplementary Document 1 & 2
• CIEH Clay Target Shooting Guidance on the Control of Noise
• Building Bulletin 93 Acoustic Design of Schools: A Design Guide
• IOA Good Practice Guide on the control of Noise from Pubs and Clubs
4.122 It is also noted that in considering the neighbouring scheme the environmental
health officer also recommended that:
“To achieve the relevant internal and external acoustic amenity criteria
may require individual or a combination of mitigation measures to be
used. This may include one or more the following, but this is not an
exhaustive list; providing sufficient separation from noise sources
providing or taking advantage of natural screens or barriers; sympathetic
orientation and layout of the development to protect/screen noise
sensitive sources; internal layout of noise sensitive uses in the building to
protect/screen noise sensitive rooms; use of sound insulating materials
and building methods for the fabric of the building.”
Gallagher Estates and Davidsons Group Overstone Green Environmental Impact Assessment Scoping Report
JUNE 2018 | KT | P17-1499 Page | 46
4.123 Contact has been made with Sywell Aerodrome, however, a response has yet to
have been received regarding the general activities and likely busy periods. The
EHO at Daventry District Council has spoken to the Aerodrome and confirmed that
all weekends from now into the summer period may be considered representative
of a typical busy operating period.
4.124 Contact will also be made with the Shooting Grounds to ascertain times of
operation etc. Where appropriate measurements of the noise associated with Clay
Pigeon Shooting will be carried out, however, given that the grounds are
approximately 2km from the proposed development this may not be necessary.
Flood Risk and Drainage
Introduction
4.125 This chapter of the Environmental Statement (ES) will assess the likely significant
effects of the Proposed Development in terms of flood risk and drainage. This
chapter will be supported by a Flood Risk Assessment and Sustainable Drainage
Statement that will be written in accordance with the National Planning Policy
Framework and prevailing national and local drainage guidance.
4.126 The ES will build on the information provided in the following Scoping Report. It
will describe the assessment methodology, the baseline conditions currently
present at the site and its immediate surroundings and the likely significant
environmental effects of the development from the construction phase through to
operation. The ES chapter will also recommend appropriate mitigation measures to
prevent, reduce or offset any significant adverse effects, assess the overall
cumulative effects and identify the likely residual effects following the
implementation of the recommended mitigation measures.
Baseline Conditions
Flood Risk
4.127 An initial assessment of the risk of flooding and its impact on the existing site has
been undertaken with consideration of the available Environment Agency flood
maps and modelling data. The assessment identified;
• The site is located within Flood Zone 1 – Very low probability of flooding
according to the Environment Agency’s flood map for planning.
Gallagher Estates and Davidsons Group Overstone Green Environmental Impact Assessment Scoping Report
JUNE 2018 | KT | P17-1499 Page | 47
• The majority of the site is identified as an area at very low risk of surface
water flooding, according to the Environment Agency’s risk of flooding
from surface water map. However, the EA information does show some
areas of the site having a low – high risk of surface water flooding.
• Initial geotechnical and geo-environmental investigation of the site has
identified potentially shallow groundwater levels beneath parts of the site.
Further investigation is required to assess the risk of groundwater flooding
to the site.
• No other sources of flooding have been identified for the site, this includes
flooding from existing sewers and artificial sources.
Drainage
4.128 The existing local public surface water and foul water sewer networks currently
serving the area of Overstone and the wider area of Northampton are owned and
maintained by Anglian Water.
4.129 A review of the existing Anglian Water asset information has identified;
• No existing surface water sewers are located within the site or in the
nearby vicinity.
• No existing foul water sewers are located within the site. The closest sewer
to the site is a 150mm diameter sewer which runs within Park View to the
south-west of the site.
Assessment Methodology
4.130 The site and the development proposals will be assessed in further detail
regarding flood risk and drainage aspects.
Flood Risk
4.131 The assessment will consider the existing sources of the flooding to the site, flood
mitigation measures and potential impacts of the development on flood risk to the
site and the surrounding area.
4.132 The methodology for the assessment of flood risk issues will include;
Gallagher Estates and Davidsons Group Overstone Green Environmental Impact Assessment Scoping Report
JUNE 2018 | KT | P17-1499 Page | 48
• Review of planning policies
• Review of Environment Agency published flood risk mapping, records of
flooding and any available flood modelling data
• Review of topography and hydrology of the subject site and the
surrounding area
• Assessment of the magnitude and severity of potential sources of flood
risk
• Consideration of flood mitigation measures for the subject site and the
surrounding area
• Evaluation of proposed construction techniques and phases and the impact
on flood risk to the site and surrounding area
Drainage
4.133 The assessment will consider existing drainage infrastructure and the disposal of
wastewater generated by the development proposals.
4.134 The methodology for the assessment of flood risk issues will include;
• Review and identification of existing surface water and foul drainage
systems within the subject site and the nearby vicinity
• Evaluation of proposed surface water and foul drainage infrastructure and
consideration of the management and disposal of flows from the subject
site
• Identify potential options for the disposal of foul and surface water flows
• Determine the ability of the existing and proposed drainage to
accommodate development flows
• Evaluation of proposed construction techniques and associated surface
water management and disposal options
• Review and assessment of surface water management and disposal
options with regards to water quality and groundwater protection
Gallagher Estates and Davidsons Group Overstone Green Environmental Impact Assessment Scoping Report
JUNE 2018 | KT | P17-1499 Page | 49
Ground Conditions and Contamination
Introduction
4.135 This chapter of the ES will address issues relating to existing ground conditions
and contamination at the Application Site, with the aim of ensuring that suitable
and safe conditions are achieved for the end-use proposed.
4.136 A desk study was carried out by Jubb on the application site in 2017, (Ref.
17223-G200-01, Version 2, dated 5/9/2017), which incorporated the following:
• Review of historic maps
• Review of Envirocheck Report of site
• Site walkover
Baseline Conditions
4.137 The site is located in an area of fields situated to the west of the village of
Overstone.
4.138 The site comprises eight agricultural fields which are used for arable farming and
from a review of the historical maps have remained relatively unchanged for the
duration of the mapped period.
Geology
4.139 The BGS 1:50,000 Solid and Drift Mapping (Northampton, Sheet 185) and the
online BGS Geology of Britain Viewer identifies the southern central strip of the site
to be underlain by Glaciofluvial Deposits comprising sand and gravel, with the
northern central strip to be underlain by the Oadby Member which is a glacial till
and comprises grey weathered brown lenses of sand and gravel, silt and clay.
4.140 These superficial deposits are underlain by the Stamford Member comprising
interbedded sandstone and siltstone and is underlain by the Northampton Sand
Formation, comprising sandy ironstone and sandstone and is shown to subcrop the
southern extremities of the site.
Hydrology & Hydrogeology
Gallagher Estates and Davidsons Group Overstone Green Environmental Impact Assessment Scoping Report
JUNE 2018 | KT | P17-1499 Page | 50
4.141 The Glaciofluvial Deposits and the solid geology beneath the site are classified as
a Secondary ‘A’ Aquifers. The Oadby Member is classified as a Secondary
Undifferentiated Aquifer.
4.142 The nearest surface water feature is an unnamed channel running along the
south-east site boundary, which appears to be a drainage culvert.
4.143 The site is not indicated to be at risk from flooding.
Site History Summary
4.144 The site has remained as open agricultural fields with a farm building in the
northern field, for the duration for the mapped period. A small clay pit was on the
boundary of the site in the 1880’s with just the scar remaining from the 1920’s. A
well is also present towards the north-eastern boundary of the site from the early
1960’s up until the 2000’s. No evidence of either was noted during the site
walkover.
4.145 In the wider surroundings, very little change has taken place, with the area
remaining open agricultural land with occasional farm houses. The village of
Overstone underwent a small residential expansion in the 1960s and has remained
largely unchanged since.
Mineral Mining
4.146 There have been five mining or quarrying sites within 1km of the site. These are
summarised in the Table below.
Proximity to
site
Details
1m SE Cowpasture Spinney Clay Pit, dates of operation not
supplied.
246m SW Overstone Sand Pit, dates of operation not supplied.
269m SW Moulton Sand Pit, dates of operation not supplied.
536m SW Vantage Sand Pit, dates of operation not supplied.
715m SW Moulton Sand Pit, dates of operation not supplied.
Radon
Gallagher Estates and Davidsons Group Overstone Green Environmental Impact Assessment Scoping Report
JUNE 2018 | KT | P17-1499 Page | 51
4.147 the site is in an intermediate probability radon area, where 5 to 10% of homes
are estimated to be at or above the Action Level, therefore basic radon protective
measures are necessary in the construction of new dwellings.
Contamination - Potential Sources
4.148 The potential contaminants described below have been identified from a study of
the site history. The principal contaminative sources are as follows:
On-site
• Agricultural fertilisers and chemicals,
• Oil and fuel use associated with agricultural vehicles and machinery stored
in farm building.
• Possibly backfilled clay pit, heavy metals, landfill gases.
Off-site
• Agricultural land use;
• Backfilled sand pit
Contamination - Potential Pathways
4.149 The main pathways identified were human uptake, percolation/leaching/migration
to groundwater and vertical and lateral migration/inhalation.
Contamination - Potential Receptors
4.150 The following potential receptors have been identified, based on the proposed
development of the site for residential purposes:
• Ground workers and construction workers
• Future site users
• Groundwater (Minor Aquifer)
• Surface water (unnamed stream/water channel along boundary)
Gallagher Estates and Davidsons Group Overstone Green Environmental Impact Assessment Scoping Report
JUNE 2018 | KT | P17-1499 Page | 52
• Building materials
4.151 The primary contamination risks at the site arise from the previous agricultural
site uses and the possibility of a backfilled clay pit, and the relevant pollutant
linkages that are potentially in operation at the site are as follows:
• Heavy Metal/ Semi-metals in any historic made ground present (risk to
construction workers and future site users)
• Organics (Hydrocarbons/PAH’s/) from agricultural vehicles and historic
made ground (risk to construction workers and future site users)
• Asbestos in made ground (risk to construction workers and future site
users)
• Ground gas from backfilled clay pit (risk to future site users)
4.152 In general, the contamination potential of the site is considered to be low.
4.153 Further site investigation will be required to confirm the contaminative potential
of the site.
Mineral Assessment
4.154 Part of the site lies within a Mineral Safeguarding Area (MSA) as defined by Policy
28 of the Northamptonshire Minerals and Waste Local Plan, adopted July 2017 by
NCC. The council which is the Mineral Planning Authority (MPA), has produced a
Policies Map which shows the southern part of the site to be covered by the MSA,
so the underlying deposit of sand and gravel is safeguarded from unnecessary
development by non-mineral development.
4.155 Ground information provided in a mineral assessment will ascertain the likelihood
and viability of the mineral being worked prior to development that might sterilise
the deposit.
Geotechnical Assessment
4.156 The site conditions are expected to comprise a minimal amount of made
ground/topsoil over variable superficial deposits, underlain by ironstone, or
siltstone and sandstone
Gallagher Estates and Davidsons Group Overstone Green Environmental Impact Assessment Scoping Report
JUNE 2018 | KT | P17-1499 Page | 53
4.157 Shallow foundations are likely to be suitable across much of the site, founding on
the superficial deposits or directly onto bedrock. The extent and composition of
the superficial deposits together with strength of the underlying bedrock should be
determined through appropriate ground investigation techniques.
Assessment Methodology
4.158 Prior to redevelopment, an intrusive phase II ground investigation should be
carried out over the site to identify and quantify any contamination, determine
depth and strength of underlying strata, and obtain suitable parameters for
geotechnical design. A proposed scope for site investigation works depends on the
layout of the proposed development, but is likely to comprise the following:
• Suitable spread of machine excavated trial pits
• Cable Percussion boreholes with SPT testing
• Installation of gas/groundwater monitoring wells and program of
monitoring
• In-situ CBR testing (Plate bearing tests/TRL DCP)
• Programme of contamination and geotechnical testing
4.159 Contamination testing should include an appropriate suite of contaminants for
solids and leachates to include Metals, Organics/Hydrocarbons and Sulphates/pH.
Waste Acceptance Criteria Testing (WAC) should also be captured as part of the
Phase II investigation, if it is anticipated that soils are to be disposed of off-site.
4.160 A suitable Interpretative Report will be required, to determine foundation and
floor slab solutions, parameters for road pavement design, and an assessment of
contamination risk.
4.161 A search of statutory service information held by service providers should be
undertaken prior to any site investigation, and appropriate onsite precautions
employed by site investigation contractors to protect any services identified.
Agricultural Land Assessment
Introduction
Gallagher Estates and Davidsons Group Overstone Green Environmental Impact Assessment Scoping Report
JUNE 2018 | KT | P17-1499 Page | 54
4.162 The land is currently in agricultural use and hence agricultural land and
agricultural businesses operating on the site are potential impact receptors. Soils
at the site are also likely to be largely undisturbed and are an important resource.
This chapter will consider the potential impacts on agricultural land, agriculture
users and soils. Consultation will take place with Natural England (the statutory
consultees for soil resources and best and most versatile agricultural land) to agree
the assessment methodology.
Baseline Conditions
4.163 National planning policy guidance relating to agriculture and soils is in National
Planning Policy Framework (2012) which states at paragraph 112 that ‘Local
planning authorities should take into account the economic and other benefits of
the best and most versatile agricultural land (defined as land in grades 1, 2 and 3a
of the Agricultural Land Classification). Where significant development of
agricultural land is demonstrated to be necessary, local planning authorities should
seek to use areas of poorer quality land in preference to that of a higher quality’.
4.164 Paragraph 109 of the NPPF states that ‘The planning system should contribute to
and enhance the natural and local environment by protecting and enhancing valued
landscapes, geological conservation interests and soils’ and ‘preventing both new
and existing development from contributing to or being put at unacceptable risk
from, or being adversely affected by unacceptable levels of soil, air, water or noise
pollution or land instability’.
4.165 The national soil strategy (Safeguarding our Soils: A Strategy for England,
DEFRA, 2009) aims to ensure that soil functions are sufficiently understood in the
planning system and that soils are better managed through all stages of
construction. An Environment Agency document Soil a Precious Resource: Our
strategy for protecting, managing and restoring soil has complementary aims.
4.166 The adopted Joint Core Strategy for West Northamptonshire (2014) states that
‘Proposals which sustain the rural economy by creating or safeguarding jobs and
businesses will be supported where they are of an appropriate scale for their
location, respect the environmental quality and character of the rural area and
protect the best and most versatile agricultural land.’
Gallagher Estates and Davidsons Group Overstone Green Environmental Impact Assessment Scoping Report
JUNE 2018 | KT | P17-1499 Page | 55
4.167 As part of the preliminary desk based study, available information referencing the
site was collated in order to gain an understanding of the site and guide the
following investigation. Geological mapping from the British Geological Society
(1:50,000) show the land is underlain by interbedded Sandstone and Siltstone of
Stamford Member. Land on the south-eastern boundary is underlain by
Northampton Sand Formation ironstone and in the north an area of Whitby
Mudstone Formation is recorded. The majority of the site is overlain by superficial
deposits of Oadby Member till with a small area of sand and gravel deposits in the
south.
4.168 From the National Soil Map produced in 1984, at a scale of 1:250,000, it is
reported that the soil is of Wick 1 Association. Soil of the Wick series is mainly
deep, well drained with coarse loam typical of brown earth, intermixed with some
gleyic brown earths and brown sands of the Arrow and Newport series respectively.
The subsoil is sandy and often overlying gravel. Provisional Agricultural Land
Classification mapping carried out in the 1970s before the revision of the
classification shows the southernmost part of the site as grade 2 with the majority
classified at grade 3. An ALC survey to the current 1988 Classification on land to
the south has been completed as part of a planning application for Overstone Leys
(permitted). This shows land adjoining the site to be of predominantly grade 1 and
2 agricultural quality.
Potential Effects and Assessment Methodology
Potential Effects – Construction phase
4.169 Agricultural production is the main visible function supported by the land with
arable crops over most of the site and smaller areas of grazed or cut grass.
Consequently agriculture (both agricultural users and land resources) will be a
potential receptor of any environmental impact of the Proposed Development.
4.170 The sustainable management of soil is also a central pillar in sustainable
development and so soil resources will be a potential receptor of impacts arising
from the development of the land.
Potential Effects – Operational phase
Gallagher Estates and Davidsons Group Overstone Green Environmental Impact Assessment Scoping Report
JUNE 2018 | KT | P17-1499 Page | 56
4.171 Once construction has ceased land that has been retained and not sealed is
expected to continue to function as a filter provided activity has not compacted the
area. Agricultural activity will permanently cease within the site.
Method of Assessment of Impact
4.172 These issues will all be addressed within the ES Chapter through a process of:
• desk studies – review of published and unpublished soils and agricultural
land quality surveys.
• a detailed survey of all soil layers down to 1-1.2 m at a density of 100 m
intervals across the application area to Natural England guidelines (TIN
049) and classification of agricultural land grades and soil resources into
maps)
• inquiry of landowners and agricultural tenants in order to determine the
nature and basis of the farming operations.
• interpretation and introduction of design elements into the project to
minimise and mitigate against any adverse impacts.
4.173 The significance of the impacts of the proposed development on the following
matters will then be evaluated:
• agricultural land resources
• soil resources
• agricultural businesses / land users
Summary Chapter and Non-Technical Summary
4.174 A chapter summarising each of the above disciplines findings will be presented. A
separate Non-Technical Summary will also be provided in accordance with the EIA
Regulations.
4.175 A non-technical summary of the findings will also be prepared, as required by the
EIA Regulations.
Gallagher Estates and Davidsons Group Overstone Green Environmental Impact Assessment Scoping Report
JUNE 2018 | KT | P17-1499 Page | 57
5 Topics proposed to be scoped out and not included within the Environmental Statement
Wind Microclimate
5.1 It is not considered the Proposed Development would result in significant effects on
human receptors in relation to wind micro climate. The Application Site is located in
a predominantly undeveloped area, and there are therefore no existing tall
buildings which may create trapped vortices/ wind tunnelling. The Lawson Criteria
is the most common set of guidelines used when considering the potential effect of
wind microclimate, and considers different pedestrian activities, with the principal
being that the quieter activities such as ‘sitting’, require lighter winds to be
‘acceptable’ than other activities such as ‘business walking’. Given the
development’s nature, it is the latter less susceptible activities which are likely to
be of most relevance.
5.2 Given the location of the Application Site, and the nature of the Proposed
Development, it is considered appropriate that wind microclimate is scoped out of
the EIA and resultant ES.
Daylight, Sunlight, Overshadowing and Glare
5.3 Given the location and nature of the application, including the lack of adjacent
sensitive receptors, there are unlikely to be significant impacts on daylight,
sunlight, overshadowing and glare.
5.4 It is therefore considered appropriate that impacts on daylight, sunlight,
overshadowing and glare are scoped out of the EIA and resultant ES.
Lighting
5.5 The Proposed Development comprises a residential scheme within the context of a
wider existing suburban area and, as such, it is considered unlikely to give rise to
significant environmental effects in respect of lighting. Impacts of lighting arising
from the development (both during and post construction) will be considered as
part of assessment work i.e. in terms of ecology, landscape and visuals, heritage
etc. where necessary.
5.6 Notwithstanding the above, given the concerns raised in response to the previous
scoping request (dated 28th November 2017) in respect of lighting, we propose to
Gallagher Estates and Davidsons Group Overstone Green Environmental Impact Assessment Scoping Report
JUNE 2018 | KT | P17-1499 Page | 58
include a section in the application setting out a lighting scheme/ mitigation
measures commensurate with the potential level of impact.
Electronic Interference
5.7 It is not considered that the Proposed Development would cause electronic
interference and therefore this is proposed to be scoped out of the EIA and
resultant EIA.
Material Assets
5.8 Material assets in EIA is a very broad term which considers both physical and non-
physical sectors that could be said to have material value. On review of the
Application Site’s location and context, it is not considered there are any further
‘material assets’ to those already addressed within other EIA topics, and therefore
no further consideration of material assets is proposed within the EIA and resultant
ES.
Gallagher Estates and Davidsons Group Overstone Green Environmental Impact Assessment Scoping Report
JUNE 2018 | KT | P17-1499 Page | 59
6 Structure of the Environmental Statement
6.1 The ES will report the findings of the EIA and will address the requirements of
Schedule 4 of the EIA Regulations, as set out in section 4.
6.2 The anticipated structure and content of the ES is likely to be as follows:
• Chapter 1 Introduction
• Chapter 2 Assessment Scope and Methodology
• Chapter 3 The Application Site
• Chapter 4 Proposed Development and Alternatives
• Chapter 5 Landscape and Visual
• Chapter 6 Ecology and Nature Conservation
• Chapter 7 Archaeology and Built Heritage
• Chapter 8 Transport and Access
• Chapter 9 Air Quality
• Chapter 10 Noise
• Chapter 11 Drainage and Flood Risk
• Chapter 12 Ground Conditions and Contamination
• Chapter 13 Socio Economics
• Chapter 14 Summary
6.3 Within each of the assessment chapters the main structure of the information
presented, although not exclusively, will be as per the following headings:
• Introduction
• Assessment Approach (including methodology, assessment of significance,
legislative and policy framework, scoping criteria, limitation)
• Baseline Conditions
• Assessment of Likely Significant Effects (Assessment of Impacts, including
construction and operation)
• Mitigation, Enhancement and Residual Effects
• Cumulative and in-combination effects
• Summary
Appendix A
Application Site Location Plan
Wind Turbine
Path
VIEW
PARK
LA
OVERSTONE
DAO
R
GNI
RE
TT
EK
WEI
ROAD
SYWELL
LANE
EN
OTSREV
O
VIEW
PAR
K
LANE
BILLING
AVENUE
THE
A43
ROAD
GNI
RE
TT
EK
Drain
Drain
Parson's Wood
Depot
Ass Bank
Highlands
Young
116m
116m
105m
114m
116m
99m
118m118m
OVERSTONE CP
Spinney
New Inn
113m
Weir
Ground
Sports
SYWELL
ROAD
Track
Track
Track
Spinney
Gashouse
Track
Track
107m
Sl
99m
101m
103m
112m
109m
Marsh Spinney
Overstone Park
Sluice
WO
OD
LA
D
AV
EN
U
E
N
K E T T E RIN
GRD
PW
Spinney
Gashouse
Recn Gd
Path
Track
Track
Trac
k
Cowpasture Spinney
W
112m
Iss
Track
CP
Bdy
Overstone
Primary
School
Site Boundary
KEY
Site boundary has been drawn to OS Vectormap information based on title plan provided
Planning | Design | Environment | EconomicsEast Midlands
Cop
yrig
ht P
egas
us P
lann
ing
Gro
up L
td.
Cro
wn
copy
righ
t. A
ll ri
ghts
res
erve
d. O
rdna
nce
Sur
vey
Cop
yrig
ht L
icen
ce n
umbe
r 10
0042
093.
Pro
map
Lic
ence
num
ber
1000
2044
9. E
map
site
Lic
ence
num
ber
0100
0316
73 S
tand
ard
OS
lice
nce
righ
ts c
ondi
tions
app
ly.
Peg
asus
acc
epts
no
liabi
lity
for
any
use
of t
his
docu
men
t oth
er th
an fo
r its
ori
gina
l pur
pose
, or
by th
e or
igin
al c
lient
, or
follo
win
g P
egas
us’ e
xpre
ss a
gree
men
t to
such
use
. T 0
1285
641
717
ww
w.p
egas
uspg
.co.
uk
Overstone Green, Northampton - Site Location PlanI Drawn by: LJE I Approved by: KT I Date: 24/05/18 I Scale: 1:5000 @ A2 I DRG: P17-1499-003 Sheet No: 01 Rev: - I Client: Gallagher Estates Iwww.pegasuspg.co.uk
0 100 250 m
Appendix B
Schedule 4 of 2017 EIA Regulations
SCHEDULE 4
INFORMATION FOR INCLUSION IN ENVIRONMENTAL STATEMENTS
1. A description of the development, including in particular:
(a)a description of the location of the development;
(b)a description of the physical characteristics of the whole development, including, where relevant, requisite
demolition works, and the land-use requirements during the construction and operational phases;
(c)a description of the main characteristics of the operational phase of the development (in particular any
production process), for instance, energy demand and energy used, nature and quantity of the materials and
natural resources (including water, land, soil and biodiversity) used;
(d)an estimate, by type and quantity, of expected residues and emissions (such as water, air, soil and subsoil
pollution, noise, vibration, light, heat, radiation and quantities and types of waste produced during the
construction and operation phases.
2. A description of the reasonable alternatives (for example in terms of development design, technology,
location, size and scale) studied by the developer, which are relevant to the proposed project and its specific
characteristics, and an indication of the main reasons for selecting the chosen option, including a comparison of
the environmental effects.
3. A description of the relevant aspects of the current state of the environment (baseline scenario) and an outline
of the likely evolution thereof without implementation of the development as far as natural changes from the
baseline scenario can be assessed with reasonable effort on the basis of the availability of environmental
information and scientific knowledge.
4. A description of the factors specified in regulation 4(2) likely to be significantly affected by the
development: population, human health, biodiversity (for example fauna and flora), land (for example land
take), soil (for example organic matter, erosion, compaction, sealing), water (for example hydromorphological
changes, quantity and quality), air, climate (for example greenhouse gas emissions, impacts relevant to
adaptation), material assets, cultural heritage, including architectural and archaeological aspects, and landscape.
5. A description of the likely significant effects of the development on the environment resulting from, inter
alia:
(a)the construction and existence of the development, including, where relevant, demolition works;
(b)the use of natural resources, in particular land, soil, water and biodiversity, considering as far as possible the
sustainable availability of these resources;
(c)the emission of pollutants, noise, vibration, light, heat and radiation, the creation of nuisances, and the
disposal and recovery of waste;
(d)the risks to human health, cultural heritage or the environment (for example due to accidents or disasters);
(e)the cumulation of effects with other existing and/or approved projects, taking into account any existing
environmental problems relating to areas of particular environmental importance likely to be affected or the use
of natural resources;
(f)the impact of the project on climate (for example the nature and magnitude of greenhouse gas emissions) and
the vulnerability of the project to climate change;
(g)the technologies and the substances used.
The description of the likely significant effects on the factors specified in regulation 4(2) should cover the direct
effects and any indirect, secondary, cumulative, transboundary, short-term, medium-term and long-term,
permanent and temporary, positive and negative effects of the development. This description should take into
account the environmental protection objectives established at Union or Member State level which are relevant
to the project, including in particular those established under Council Directive 92/43/EEC(1) and Directive
2009/147/EC(2).
6. A description of the forecasting methods or evidence, used to identify and assess the significant effects on the
environment, including details of difficulties (for example technical deficiencies or lack of knowledge)
encountered compiling the required information and the main uncertainties involved.
7. A description of the measures envisaged to avoid, prevent, reduce or, if possible, offset any identified
significant adverse effects on the environment and, where appropriate, of any proposed monitoring
arrangements (for example the preparation of a post-project analysis). That description should explain the
extent, to which significant adverse effects on the environment are avoided, prevented, reduced or offset, and
should cover both the construction and operational phases.
8. A description of the expected significant adverse effects of the development on the environment deriving
from the vulnerability of the development to risks of major accidents and/or disasters which are relevant to the
project concerned. Relevant information available and obtained through risk assessments pursuant to EU
legislation such as Directive 2012/18/EU(3) of the European Parliament and of the Council or Council Directive
2009/71/Euratom(4) or UK environmental assessments may be used for this purpose provided that the
requirements of this Directive are met. Where appropriate, this description should include measures envisaged
to prevent or mitigate the significant adverse effects of such events on the environment and details of the
preparedness for and proposed response to such emergencies.
9. A non-technical summary of the information provided under paragraphs 1 to 8.
10. A reference list detailing the sources used for the descriptions and assessments included in the
environmental statement.
Appendix C
Landscape Scoping Report
Overstone Green
Landscape Scoping Report
Client: Davidsons Developments & Gallagher Estates
Date: May 2018
Ref: GL0894
l a n d s c a p e a r c h i t e c t s
golby luck+
T e l : 0 1 5 3 0 2 6 5 6 8 8
W e b : w w w . g o l b y a n d l u c k . c o . u k
E m a i l : i n f o @ g o l b y a n d l u c k . c o . u k
O f f i c e : 20 7 L e ice s te r R o ad , I b s t oc k , L e i ce s te r s h i r e , LE 67 6 H P
G ol by and Luc k L TD (Com pa ny N o. 90 37 7 76 ) Re g i s t e r ed i n E ng l a nd and Wal e s
Overstone Green � Landscape Scoping Report
Client: Davidsons Developments & Gallagher Estates
REF: GL0894 i DATE: MAY 2018
CONTENTS
1 INTRODUCTION.......................................................................................................................................... 1
2 THE SITE ........................................................................................................................................................ 2
3 LVIA METHODLOLGY ................................................................................................................................ 4
4 LANDSCAPE CHARACTER ..................................................................................................................... 17
5 VISUAL SETTING ........................................................................................................................................ 24
6 CUMMULATIVE AND IN COMBINAITON EFFECTS ............................................................................... 25
FIGURES
GL0894 01 Site Context
GL0894 02 Site Location
GL0894 07 Zone of Theoretical Visibility
Overstone Green � Landscape Scoping Report
Client: Davidsons Developments & Gallagher Estates
REF: GL0894 1 DATE: MAY 2018
1 INTRODUCTION
1.1 This landscape baseline report has been carried out by Golby + Luck Landscape Architects
following instruction by Davidsons Developments Ltd and Gallagher Estates to review the
land to the west of Overstone village in Northamptonshire that forms the northern extension
to the Northampton North Sustainable Urban Extension (NNSUE) as identified in the West
Northamptonshire Joint Core Strategy Local Plan (Part 1) adopted December 2014 (JCT).
The SUE is located within the jurisdiction of Daventry District Council.
1.2 The southern half of the SUE is the subject of outline planning approval (DA/2013/0850) that
was the subject of an Environmental Statement (ES) with a supporting landscape and
visual impact assessment chapter prepared by Pegasus Group (Pegasus LVIA). This
application also considered the cumulative effects of bringing forward the entire SUE set
out in an ES Addendum also prepared by Pegasus Group (Pegasus CE).
1.3 This landscape scoping report considers the main issues that will be the focus of the
landscape and visual impact assessment (LVIA) prepared in support of an outline planning
application for the remaining northern half of the NNSUE (the site).
1.4 In the production of the LVIA the following documents and information will be considered:
National Planning Policy Framework 2012 (NPPF);
National Planning Policy Framework (Draft) 2018 (Draft NPPF);
Daventry District Local Plan (June 1997) Saved September 2007 (Local Plan);
West Northamptonshire Joint Core Strategy Local Plan (Part 1) adopted
December 2014 (JCT)
Natural England Character of England � NCA 89 Northamptonshire Vales;
Northamptonshire Current Landscape Character Assessment � November 2006,
and Current Landscape Character Strategy and Guidelines;
Daventry Landscape Character Assessment 2017;
Northampton Landscape Sensitivity and Green Infrastructure Study 2009 (NLGS)
British Listed Buildings online resource:
(http://www.britishlistedbuildings.co.uk/map);
Historic England National Heritage List for England:
(https://historicengland.org.uk/listing/the-list);
Ordnance Survey information Explorer 1:20,000 and Street Plus 1:10,000; and
Google Maps aerial photography.
Overstone Green � Landscape Scoping Report
Client: Davidsons Developments & Gallagher Estates
REF: GL0894 2 DATE: MAY 2018
2 THE SITE
2.1 The site extends to approximately 79.5 hectares of farmland extending north-east from
Northampton set between the A43 Kettering Road to the north and Cowpasture Spinney
to the south.
2.2 The site comprises 8no. medium scale geometrically shaped arable fields defined by
native boundary hedgerows and intermittent tree cover. There are no field trees within
the site beyond the boundary hedgerows. Some of the boundaries have planting belts
that appear to be associated with the wider use of Cowpasture Spinney as a local shoot.
The spinney is characterised by dense belt of native deciduous woodland.
2.3 The site sits on a local ridgeline set between Cowpasture Spinney and its associated
watercourse to the east, and the valley setting of a separate local watercourse to the west
that flows south from Overstone Grange and Rectory Farm. The site falls from a high-point
at its north-east boundary of approximately 120m above ordnance datum (AOD), to a
low-point of approximately 100m AOD at the south-east boundary with the spinney.
2.4 Beyond the land-use and associated framework of boundary hedgerows and trees there
is a small collection of farm buildings located towards the northern boundary of the site
that are accessed from Kettering Road via an unmade track. An overhead electricity line
with associated pylons crosses the site from the south-west to the north-east.
2.5 Beyond the site, local settlement includes the immediately adjoining committed NNSUE to
the south that affords outline planning permission, to the south-east the linear settlements
of Overstone and Sywell, and to the west the larger settlement of Moulton.
2.6 Wider land uses that are distinct from the otherwise farmed landscape and urban setting
of Northampton include Overstone Park and Golf Course to the south, Overstone Lakes
Holiday Park also to the south, Sywell Reservoir and Sywell Country Park to the south-east,
and Sywell Aerodrome with associated commercial development to the north-east.
2.7 Beyond the local setting of the site there are large areas of woodland cover to the north
of the site that include Sywell Wood and Harwick Wood. To the north-west is Pitsford Water
and Brixworth Country Park that comprises a major leisure and recreation resource.
2.8 In terms of access, the site is crossed by public footpath DG2 that connects between
Rectory Farm to the north-west of the site and Sywell Road at Overstone to the south.
Footpath DG1 runs alongside the south-west boundary of the site. Footpath DG3 runs
Overstone Green � Landscape Scoping Report
Client: Davidsons Developments & Gallagher Estates
REF: GL0894 3 DATE: MAY 2018
Between Overstone Grange and Moulton on the northside of Kettering Road, and
footpath DG4 provides a short section of path connecting Overstone Grange with
Kettering Road. To the Northamptonshire Round recreation route passes to the east of the
site from Sywell Reservoir heading north to Sywell Wood then west to Halcot and Pitsford
Reservoir. The site itself is maintained as private farmland and does not provide any public
access beyond the designated rights of way.
2.9 In terms of designations, the site is not covered by any statutory or non-statutory
designation that would prohibit its development in accordance with the JCT allocation.
The site is not covered by any landscape designation that would suggest an increased
value or sensitivity to change. The site is also not covered by any functional planning
designation that would be compromised by development.
2.10 To the north-west of the site Overstone Grange, The Old Farmhouse, and Rectory
Farmhouse are all Grade II Listed Buildings. To the south-east of the site there are number
of Listed Buildngs associated with Overstone and Sywell the most notable being the Grade
II* Church of St Peter and Paul and Grade II* Sywell Hall. To the south of the site there are
also a number of Grade II Listed Buildings associated with Overstone Hall and its remnant
parkland. Beyond the local setting, Pitsford Reservoir to the north is a designated Site of
Special Scientific Interest (SSSI), as is Hardwick Lodge Meadow to the north of the site. To
the south of the site there is a large Roman-British settlement to the west of Ecton Lodge
that is a Scheduled Ancient Monument (SAM).
Overstone Green � Landscape Scoping Report
Client: Davidsons Developments & Gallagher Estates
REF: GL0894 4 DATE: MAY 2018
3 LVIA METHODLOLGY
3.1 This methodology is based on the following published guidelines:
Preparation of Environmental Statements for Planning Projects that require
Environmental Assessment - A Good Practice Guide (1999) DETR London, The
Stationery Office;
Guidelines for Landscape and Visual Assessment 3rd Edition (2013) the Landscape
Institute and the Institute of Environmental Assessment, E and FN Spon (GLVIA3);
An approach to Landscape Character Assessment � Natural England (2014);
Photography and photomontage in landscape and visual impact assessment � The
Landscape Institute Advice Note 01/11; and
Visual representation of development proposals � Technical Guidance Note 02/17
(2017);
Assessment Approach
3.2 The approach to this LVIA comprises the following stages:
Determining the scope of the assessment;
A summary of the relevant national and local planning policy, along with
supporting supplementary planning guidance;
The detailed consideration of the landscape and visual baseline conditions of the
site that includes the identification of key resources and receptors through a
combination of the desktop and research and field based survey work. This in turn
results in the determination of value;
The description of the development proposals;
The determination of the susceptibility of each land and visual receptors that is
then combined with the judgement of value to make an overall assessment of
sensitivity.
The determination of the likely magnitude of change experience by each
receptor;
The assessment of the likely landscape and visual effects of the proposed
development when assessed against the baseline of the approved development;
Overstone Green � Landscape Scoping Report
Client: Davidsons Developments & Gallagher Estates
REF: GL0894 5 DATE: MAY 2018
The identification of measures that seek to avoid, remedy or compensate any likely
significant adverse effects (mitigation measures);
The subsequent reassessment of any residual effects of development specifically
highlighting any remaining significant effects; and
The consideration of any cumulative effect arising from developments in the
locality of the site likely to further influence any change on the landscape and
visual resource within the study area.
3.3 The assessment of landscape and visual effects is set out as a series of transparent and
balanced professional judgements that follow three specific stages:
The evaluation of the sensitivity of the landscape and visual receptors. This process
considers both the susceptibility of the receptor to the proposed change and the
perceived value of each receptor;
The identification of the extent of physical change to the existing landscape
resource, to landscape character, and to the visual setting of the site; and
The combined assessment of the nature of receptor (sensitivity) and the nature of
the proposed change (magnitude) resulting in a professionally informed
judgement as to the significance of any likely impacts.
Scoping and Consultation
3.4 This report has been prepared to assist in the ES scoping exercise. As part of this report the
following information has been provided for agreement with Daventry District Council
(DDC);
LVIA methodology;
Zone of Theoretical Visibility (ZTV) setting out the baseline ZTV for the site, and the
ZTV for a development parameter of up to 10m in height; and
Broad distribution and location of representative view.
Landscape Baseline
3.5 The landscape baseline seeks to establish the value associated with the site, its local
landscape setting, and its associated features. To understand value the assessment
considered several factors when describing the site context and location that includes:
Lane use;
Overstone Green � Landscape Scoping Report
Client: Davidsons Developments & Gallagher Estates
REF: GL0894 6 DATE: MAY 2018
Vegetation;
Topography;
Water features;
Public access; and
Local key characteristics
3.6 Landscape planning designation and published landscape character studies help to
inform this assessment but their relevance with depend on the purpose and geographic
extent of the designation, and detail of the study when considered against the nature and
extent of the study.
3.7 As part of the landscape baseline an assessment of value is made. Box 5.1 in the GLVIA
sets out a range of factors that can help in the identification of valued landscape and
therefore inform a judgement as to their sensitivity. These include:
Landscape quality: A measure of the physical state of the landscape. It may
include the extent to which typical character is represented in individual areas, the
intactness of the landscape and the condition of individual elements.
Scenic quality: The term used to describe landscapes that appeal primarily to the
senses (primarily but not wholly the visual sense).
Rarity: The presence of rare elements or features in the landscape or the presence
of a rare Landscape Character Type.
Representativeness: Whether the landscape contains a particular character
and/or features or elements which are considered particularly important
examples.
Conservation interests: The presence of features or wildlife, earth science or
archaeological or historical and cultural interest can add to the value of the
landscape as well as having value in their own right.
Recreation value: Evidence that the landscape is valued for recreational activity
where experience of the landscape is important.
Perceptual aspects: A landscape may be valued for its perceptual qualities,
notably wildness and/or tranquillity.
Overstone Green � Landscape Scoping Report
Client: Davidsons Developments & Gallagher Estates
REF: GL0894 7 DATE: MAY 2018
Associations: Some landscape are associated with particular people, such as
artists or writers, or events in history that contribute to perceptions of the natural
beauty of the area.
3.8 At varying levels communities and individual will have differing perceptions as to the value
of a landscape. However, for the purposes of landscape assessment it is important to set
out a reasoned hierarchy of criteria for assessing value. Value is essentially concerned with
the importance or rarity of a landscape and its ability to be substituted or replicated.
Value can be categorised as follows:
Very High Landscape Value � landscapes of great importance or rarity that would
have limited potential for substitution or replication. Such landscapes are often
identified by designation such as National Parks, Areas of Outstanding Natural
Beauty, or World Heritage Sites. This may also include local destinations such as
Areas of Great Landscape Value or Special Landscape Areas where the special
interest of the designation is strongly represented and would be difficult to
replicate. It is not the case that all designated landscapes are of high value, areas
where features of special interest are poorly represented may be of a reduced
value. Likewise, undesignated landscapes with high concentrations of designated
features in close proximity (such as heritage assets) where the landscape between
them makes a critical contribution to their setting and interrelationship may be of
increased value.
High Landscape Value � landscapes of local value that are of good condition
and/or strong strength of character with some potential for substitution or
replication. This will include both local designated and undesignated landscapes,
and landscapes with high concentrations of designated features in close proximity
(such as heritage assets) where the landscape between them makes a valuable
contribution to their setting and interrelationship.
Medium Landscape Value � landscapes of moderate value or rarity that have
potential for substitution or replication. Such landscapes can be identified through
local designation or may be undesignated but provide an important setting to
locally designated landscape or heritage assets such as Conservation Areas and
Listed Buildings. There may also be parts of broader national designations where
the features of special interest are either weak or poorly represented, and/or
detracting features that limit the value attached to that particular part of the wider
designation.
Overstone Green � Landscape Scoping Report
Client: Davidsons Developments & Gallagher Estates
REF: GL0894 8 DATE: MAY 2018
Low Landscape Value � landscapes of limited value or rarity that can be
substituted or replicated. Such landscapes are unlikely to be designated with a
moderate to weak strength of character and will be made up of features that are
both common and widespread, and are of moderate to poor quality (condition).
Visual Baseline
3.9 In establishing the visual baseline, a series of representative view towards the site covering
a range of visual receptors have been identified through field survey work and are
identified on plans. The selected viewpoints can typically cover three types of views that
are described in the GLVIA as:
Representative viewpoints � selected to represent the experience of different types
of visual receptor, where large numbers of viewpoints cannot be included
individually and where the significant effects are unlikely to differ;
Specific viewpoints � chosen because they are key and sometimes promoted
viewpoints within the landscape, including for example specific local visitor
attractions, viewpoints in areas of particularly noteworthy visual and/or
recreational amenity such as landscape with statutory landscape designations, or
viewpoints with particular cultural landscape associations. Specific views include
those from recreational spaces, cemeteries, public footpaths, open access land,
and promoted trails.
Illustrative viewpoints � chosen specifically to demonstrate a particular effect or
specific issues, which might, for example, be the restricted visibility at certain
locations.
3.10 Not all of these types of viewpoints will be present or need to be considered in all of the
assessment. The majority of viewpoints will be representative but not exclusively. All of the
viewpoints considered are taken from publicly accessible locations. The likely effect of the
development proposal on private locations, such as houses, is made through professional
judgement based on views from publicly accessible locations nearby.
3.11 The representative views are described as part of the visual baseline assessment and
consider the following criteria:
Location of the viewpoint;
Type of existing view;
Distance between the observer and the site; and
Overstone Green � Landscape Scoping Report
Client: Davidsons Developments & Gallagher Estates
REF: GL0894 9 DATE: MAY 2018
Extent and context of the site and/or likely view of development proposal
observed.
3.12 With specific regard to distance between the observer and site and the extent of the
site/development observed the following descriptions are used:
Open views � uninterrupted views into the site;
Filtered views � views partially obstructed by vegetation, landform, built-form or
combinations of each; and
Distant views � this is based on a judgement that will take into account the scale
and nature of the proposal and character of the receiving landscape.
3.13 As part of the baseline assessment judgements must be made about the value attached
to a view. Value may be attached to views that relate to designated landscapes and
heritage assets. Value may also be attached through appearance in guide books, on
maps, and through the provision of facilities specific to the enjoyment of a view such as
benches or interpretation boards. Value may also be attached to views associated with
heritage assets, these are often identified in heritage assessments and conservation area
appraisals. Value can be categorised as:
Very High Visual Value � Promoted views identified on maps, or local walks/guides
that are highly valued as a destination to appreciate a particular landscape or
feature. This may include views towards notable natural features, structures,
houses, heritage assets, or exceptional landscapes. These views are considered to
be of greater than local value and are likely to be marked by signs, seating, or
features that promote the view.
High Visual Value � Views from publicised vantage points, or to a landscape of
national importance, or highly popular visitor attractions where the view forms an
important part of the experience or has important cultural associations. This may
include particularly noteworthy views from identified trials, designated landscapes,
and statutory heritage assets. These views are considered to be of greater than
local value and regularly visited. Private views may include residential properties
specifically designed to take advantage of a particular view;
Medium Visual Value � Locally known or valued viewpoints. Views from promoted
public rights of way or clear evidence of regular use and areas of informal open
Overstone Green � Landscape Scoping Report
Client: Davidsons Developments & Gallagher Estates
REF: GL0894 10 DATE: MAY 2018
space. Views from regularly used rooms or living spaces. Panoramic views, vistas,
or other noteworthy views from active recreation land, or highways; and
Low Visual Value � Views that are not published and/or where there is limited
evidence of regular use. Views from secondary windows not forming the main
living or working spaces in properties. Views of little noteworthiness from active
recreation land, or highways.
Assessment of Landscape Effects
3.14 The initial stage of the assessment of landscape effect is to determine the susceptibility of
the receptor to the proposed change, and an overall assessment of landscape sensitivity.
3.15 The following criteria are used to establish landscape susceptibility. Whilst these are typical
examples it does not always follow that a site within a specific landscape designation will
automatically fit with this categorization. Much will depend on the specific site conditions.
Very High Susceptibility � A landscape possessing a strong and defined character
of notable scenic quality, in good condition with a very low tolerance to the
proposed change.
High Landscape Susceptibility - A landscape possessing a defined character of
good scenic quality, in good condition with a low tolerance to the proposed
change.
Medium Landscape Susceptibility � A landscape possessing a moderate strength
character and scenic quality, in moderate condition with a moderate tolerance
to the proposed change
Low Landscape Susceptibility � A landscape possessing a weak and undefined
character of limited scenic quality, in poor condition with a high tolerance to the
proposed change.
3.16 Judgements of value and susceptibility are then combined as an assessment of overall
sensitivity:
Table 1 � Matrix of Landscape Sensitivity
SUSCEPTIBILITY
VALU
E VERY HIGH HIGH MEDIUM LOW
VERY HIGH Very High Very High High Medium
Overstone Green � Landscape Scoping Report
Client: Davidsons Developments & Gallagher Estates
REF: GL0894 11 DATE: MAY 2018
HIGH Very High High Medium Medium
MEDIUM High Medium Medium Low
LOW Medium Medium Low Low
3.17 The following stage of the assessment process considers the magnitude of change
imposed by the proposed development on each landscape receptors. Issues that inform
this judgement include:
Size or scale: The amount of change resulting from the proposal to features, or key
characteristics and attributes of the landscape type or area.
Geographic extent: Determines the extent to which the landscape type or area
will be affected by the proposed development.
Duration and reversibility of the landscape effect: The timeframe, or duration of the
effect by the proposed development, and whether the effect is permanent or
temporary.
3.18 The likely magnitude of change of the development proposal can be guided by the
following criteria:
High magnitude of change � The proposal will result in a total change in the key
characteristics of the landscape character, will introduce elements into the
landscape that are totally uncharacteristic to the receiving landscape, and/or will
result in the substantial loss, or alteration of key elements/features.
Medium magnitude of change � The proposal will result in a change in the key
characteristic of the landscape character, will introduce elements
uncharacteristic to the attributes of the receiving landscape, and/or will result in
loss, or alteration to key elements/features.
Low magnitude of change � The proposal will result in a partial change to the key
characteristics of the landscape character, will introduce elements that are not
entirely uncharacteristic to the attributes of the receiving landscape, and/or will
result in the minor loss, or alteration to key elements/features.
Negligible magnitude of change � The proposal will result in a very limited changed
to the key characteristics of the landscape character, will introduce elements
Overstone Green � Landscape Scoping Report
Client: Davidsons Developments & Gallagher Estates
REF: GL0894 12 DATE: MAY 2018
consistent with the attributes of the receiving landscape, and/or will result in an
limited loss, or alteration to key elements/features.
3.19 The combined judgements on the nature of the receptor (sensitivity) and the nature of the
impact (magnitude) are combined to arrive at a clear and transparent judgement of
significance. The significance of landscape effects are described in the assessment text
and are guided by the matrix set out below:
Table 2 � Matrix of Landscape Significance
SENSITIVITY
MA
GN
ITUDE
O
F C
HAN
GE
VERY HIGH HIGH MEDIUM LOW
HIGH Major Major Major-Moderate Moderate
MEDIUM Major-Moderate Major-Moderate Moderate Minor
LOW Moderate Moderate Minor Minimal
NEGLIGIBLE Minor Minor Minimal Minimal
3.20 For the purpose of this assessment, effects that are of major and major-moderate
significance (highlighted in blue) are those considered particularly relevant to the planning
decision making process.
Assessment of Visual Effects
3.21 The initial stage of the assessment of visual effect is to determine the susceptibility of the
receptor to the proposed change, and an overall assessment of landscape sensitivity.
3.22 GLVIA describes the susceptibility of different visual receptors to changes in views and
visual amenity as a function of:
the occupation or activity of people experiencing the view at particular locations;
and
the extent to which their attention or interest may therefore be focussed on the
views and the visual amenity they experience in particular locations.
3.23 The GVLIA goes on to categorise those receptor groups that are likely to be most
susceptible to change:
Overstone Green � Landscape Scoping Report
Client: Davidsons Developments & Gallagher Estates
REF: GL0894 13 DATE: MAY 2018
residents at home;
people, whether residents or visitors, who are engaged in outdoor recreation,
including people using public rights of way, whose attention or interest is likely to
be focussed on the landscape and on particular views;
visitors to heritage assets, or to other attractions, where views of the surroundings
are an important contributor to the experience;
communities where views contribute to the landscape setting enjoyed by the
residents in the area.
3.24 Whilst this covers a number of potential visual receptors it does not automatically make
them all highly susceptible to change. Susceptibility can be categorised as follows:
Very High Susceptibility � Views that provide a key understanding and
appreciation of valued landscapes (most notably National Parks and AONB�s),
notable natural features, or historic structures/properties (such as engineering
structures or country houses).
High Visual Susceptibility - Primary views from residential properties; users of public
rights of way, informal footpaths, cycleways and public open space where the
appreciation of the wider landscape setting is critical to its function and
enjoyment; visitors to local attractions and heritage/wildlife assets where views of
the wider landscape are important to its setting.
Medium Visual Susceptibility - Secondary/restricted views from residential
properties; users of public rights of way, informal footpaths, cycleways, lanes and
public open space where the appreciation of the wider landscape setting is
moderately important to its function and enjoyment; and visitors to local
attractions and heritage/wildlife assets where views of the wider landscape make
a contribution to its setting but are not critical to its appreciation and enjoyment.
Low Visual Susceptibility - People engaged in outdoor sport and recreation where
the appreciation of views is not critical to their enjoyment; people at their
workplace where the setting is not important to the quality of working life, and road
or footpath users where views of the wider landscape make a limited contribution
to its setting.
3.25 In terms of views from residential properties it is important to note that the planning system
does not serve to protect private interests. The key issues in considering residential views is
Overstone Green � Landscape Scoping Report
Client: Davidsons Developments & Gallagher Estates
REF: GL0894 14 DATE: MAY 2018
not whether an occupier would experience financial or other loss from development but
whether such development would unacceptably affect the residential amenity of the
property and associated land holding. A number of Local Authorities have adopted
residential amenity standards for new development that have been specifically
implemented to control the relationship between existing and proposed development.
Where such standards exist, these will be relied upon and not replicated through further
assessment.
3.26 Judgements of value and susceptibility are then combined as an assessment of overall
sensitivity:
Table 3 � Matrix of Visual Sensitivity
SUSCEPTIBILITY
VALU
E
VERY HIGH HIGH MEDIUM LOW
VERY HIGH Very High Very High High Medium
HIGH Very High High Medium Medium
MEDIUM High Medium Medium Low
LOW Medium Medium Low Low
3.27 The following stage of the assessment process considers the magnitude of change
imposed by the proposed development on each visual receptor. Issues that inform this
judgement include:
Size or scale: This includes the loss of important features to the character and
composition of the views, the degree of consistency between the proposals and
visual setting of the receiving landscape, and the extent of the view and
proportion of that view the proposals in likely to influence or change.
Geographic extent: The extent of the area in which the proposed change will be
visible.
Duration and reversibility of the visual effect: The timeframe, or duration of the
effect by the proposed development, and whether the effect is permanent or
temporary.
Overstone Green � Landscape Scoping Report
Client: Davidsons Developments & Gallagher Estates
REF: GL0894 15 DATE: MAY 2018
3.28 The likely magnitude of change of the development proposal can be guided by the
following criteria:
High magnitude - The proposal will cause a dominant or complete change or
contrast to the view, resulting in the loss or addition of substantial features in the
view, at odds with the existing visual character, and substantially altering the
appreciation of the view.
Medium magnitude - The proposal will cause a clearly noticeable change or
contrast to the view, which will have an effect on composition through the loss or
addition of features, noticeably altering the appreciation of the view.
Low magnitude - The proposal will cause a perceptible change or contrast in the
view, but which will not materially affect the composition or the appreciation of
the view.
Negligible magnitude - The proposal will cause a barely perceptible change or
contrast to the view that will not affect the composition or the appreciation of the
view.
No change � no part of the scheme or associated works will be discernible in the
view.
3.29 The combined judgements on the nature of the receptor (sensitivity) and the nature of the
impact (magnitude) are combined to arrive at a clear and transparent judgement of
significance. The significance of visual effects are described in the assessment text and
are guided by the matrix set out below:
Table 4 � Matrix of Landscape Significance
SENSITIVITY
MA
GN
ITUDE
O
F C
HAN
GE
VERY HIGH HIGH MEDIUM LOW
HIGH Major Major Major-Moderate Moderate
MEDIUM Major-Moderate Major-Moderate Moderate Minor
LOW Moderate Moderate Minor Minimal
NEGLIGIBLE Minor Minor Minimal Minimal
Overstone Green � Landscape Scoping Report
Client: Davidsons Developments & Gallagher Estates
REF: GL0894 16 DATE: MAY 2018
3.30 For the purpose of this assessment, effects that are of major and major-moderate
significance (highlighted in blue) are those considered particularly relevant to the planning
decision making process.
Criteria of Other Factors Assessed
3.31 The assessment also considers the following aspects;
Directs and indirect effects � direct effect effects are those directly attributable to
the development. These include changes to features, character, and views.
Indirect effects are those resulting indirectly from the development. These affects
may result as a consequence of direct effects over distance from the site, or a
sequence of change over time or distance;
Seasonal variation � due to the role that vegetation can play in preventing or
limiting views, or influencing the character of the landscape, the difference
between winter and summer needs to be considered. This is considered by
assessing winter views (in the first year following completion) and in summer (after
15 years);
Beneficial, neutral, or adverse effects - adverse effects are those that would be
damaging to the quality, integrity, or key characteristics of the landscape and/or
visual resource. Beneficial effects are those that would result in an improvement in
the quality, integrity, or key characteristics of the landscape and/or visual resource.
Neutral effects are those effect that would maintain, on balance, the existing levels
of quality, integrity, or key characteristics of the landscape and/or visual resource.
Overstone Green � Landscape Scoping Report
Client: Davidsons Developments & Gallagher Estates
REF: GL0894 17 DATE: MAY 2018
4 LANDSCAPE CHARACTER
National Level
4.1 At a national level the site and its local context are identified as being located within
National Character Area (NCA) 89: Northamptonshire Vales. The key characteristics of this
NCA are identified as:
�An open landscape of gently undulating clay ridges and valleys with occasional
steep scarp slopes. There is an overall visual uniformity to the landscape and
settlement pattern.
Diverse levels of tranquillity, from busy urban areas to some deeply rural parts.
Mixed agricultural regime of arable and pasture, with arable land tending to be
on the broader, flat river terraces and smaller pastures on the slopes of many minor
valleys and on more undulating ground.
Relatively little woodland cover but with a timbered character derived largely from
spinneys and copses on the ridges and more undulating land, and from waterside
and hedgerow trees and hedgerows, though the density, height and pattern of
hedgerows are varied throughout.
A strong field pattern of predominantly 19th-century and � less frequently � Tudor
enclosure.
Distinctive river valleys of the Welland and the Nene, with flat flood plains and
gravel terraces together with their tributaries (including the Ise). Riverside meadows
and waterside trees and shrubs are common, along with flooded gravel pits, open
areas of winter flooded grassland, and wetland mosaics supporting large numbers
of wetland birds and wildfowl.
Frequent large settlements that dominate the open character of the landscape,
such as Northampton and Wellingborough, and associated infrastructure,
including major roads, often visually dominant.
Frequent small towns and large villages often characterised by red brick buildings
and attractive stone buildings in older village centres and eastern towns and
villages. Frequent imposing spired churches are also characteristic, together with
fine examples of individual historic building.
Overstone Green � Landscape Scoping Report
Client: Davidsons Developments & Gallagher Estates
REF: GL0894 18 DATE: MAY 2018
Relatively frequent, prominent historic parklands and country houses towards the
outer edges and close to more wooded areas. Other characteristics include ridge
and furrow and nationally important townships such as Sutton Bassett and Clipston.
Localised high concentrations of threshing barns and high status timberframed
farm buildings from the 18th century or earlier�
4.2 These characteristics are broadly representative of the site and its local context that
includes and open undulating farmed landscape with a timbered character derived from
spinneys and copses. The site has a strong field pattern and the local setting of the site is
characterises by the setting of Northampton to the south and wider rural settlements to
the north, east, and west.
County Level
4.3 The Northamptonshire Current Landscape Character Assessment identifies the southern
half of the site as being located within the Rolling Ironstone Valley Slopes landscape
character type (LCT). The key characteristics of this LCT are identified as:
�Broad valley slopes dissected by numerous tributary streams;
Ironstone geology expressed in local vernacular buildings and in rich red soils;
rolling landform, extensive views and sense of exposure on some prominent
locations;
steep slopes adjacent to more elevated landscapes;
numerous water bodies including the county�s largest reservoir;
productive arable farmland in medium and large scale fields predominates on
elevated land although sheep and cattle pastures also prevalent, often in smaller
fields adjacent to watercourses;
agricultural practices create a patchwork of contrasting colours and textures
extending across valley slopes;
where broadleaved woodlands and mature hedgerow trees combine, these
impart a sense of a well treed landscape;
hedgerows generally low and well clipped although intermittent sections show
evidence of decline;
Overstone Green � Landscape Scoping Report
Client: Davidsons Developments & Gallagher Estates
REF: GL0894 19 DATE: MAY 2018
well settled with numerous villages and towns;
landscape directly and indirectly influenced by the close proximity of many of the
county�s urban areas; and
building materials vary although vernacular architecture and churches display the
local ironstone.�
4.4 More specifically the southern half of the site is identified within the Moulton Slopes
landscape character area (LCA). The assessment summary of this LCA states:
�The Moulton Slopes Character Area is located to the north of Northampton. It
comprises a broad valley, through which flows the Sedge Brook, a tributary of the
Brampton Valley, and a smaller watercourse, which flows southwards into
Northampton to the west of Overstone. From the upper slopes of the valley, wide views
across rolling farmland are possible. From the slopes above Moulton, views southwards
to Northampton are largely screened by vegetation and landform. However, tall urban
elements such as the Express Lifts Tower are prominent features punctuating the skyline.
The landscape is relatively well settled, with the villages of Boughton, Moulton and
Overstone lying along the winding road that runs along the southern slopes of the
Sedge Brook valley. Pitsford is also located within the character area. This small village
is situated on the watershed between Pitsford Water and the valley of the Sedge Brook.
Land cover is typically arable farmland, although improved and semi improved
pastures are more dominant along lower valley slopes and along watercourses.
Woodland cover is low, although significant areas of deciduous woodland can be
found in the vicinity of Overstone. Cowpasture Spinney is a particularly interesting
feature. This is a linear belt of woodland running along the stream to the west of
Overstone Park. Large areas of woodland are also features of designed parklands, as
at Overstone Park and Boughton.�
4.5 The northern half of the site is identified as being located within the Clay Plateau LCT. The
key characteristics of this LCT are identified as:
�Boulder Clay deposits overlie almost the entire landscape, obscuring variations in
the underlying solid geology and giving a unity of character;
broad, elevated undulating plateau dissected and drained by numerous valleys
with convex profile valley sides;
Overstone Green � Landscape Scoping Report
Client: Davidsons Developments & Gallagher Estates
REF: GL0894 20 DATE: MAY 2018
expansive, long distance and panoramic views across open areas of plateau;
sense of exposure on some prominent locations;
limited woodland / tree cover comprising broadleaved woodlands and mature
hedgerow trees;
where trees, woodlands and undulating landform combine, they limit or define
views and create a more intimate character in places;
numerous water bodies including small reservoirs on the Naseby Plateau;
productive arable farmland within medium and large scale fields predominates on
elevated land although sheep and cattle pastures also prevalent, often in smaller
fields adjacent to watercourses;
hedgerows are often low and well clipped, although intermittent sections show
evidence of decline, and emphasise the undulating character of the landscape;
sparsely settled with small villages and isolated farms prevalent; and
monuments and landscape features associated with the Battle of Naseby are
distinctive elements of the local landscape.
4.6 More specifically the northern half of the site is identified within the Sywell Plateau
landscape character area (LCA). The assessment summary of this LCA states:
Sywell Plateau Character Area is located in the heart of Northamptonshire. It is the
most extensive of the Clay Plateaux and almost completely surrounded by the Rolling
Ironstone Valley Slopes, with the exception of a small area of Undulating Hills and
Valleys located to the northwest, and the urban centre of Wellingborough to the
southeast. The plateau rises at one point to a height of 160m ASL, although it generally
has an almost consistent elevation of around 130m ASL. The gently undulating
landform across the plateau has been formed by a series of small watercourses. Stream
action has resulted in the local erosion of the glacial till that otherwise covers the
plateau area. The area is characterised by a predominance of large to medium to
large scale arable fields generally regular or sub regular in shape, although their size
decreases to the western side of the A43(T) from Walgrave to the southern boundary,
where fields of improved grassland become more frequent. Improved pastures are
also evident surrounding village settlements and on steeper landform adjacent to
Overstone Green � Landscape Scoping Report
Client: Davidsons Developments & Gallagher Estates
REF: GL0894 21 DATE: MAY 2018
streams. The area occupied by Northampton (Sywell) Airport represents a significant
area of unimproved calcareous grassland whilst the disused airfield to the north of the
area is under arable cultivation. Woodland cover is typically low, comprising small to
moderately sized often geometric broadleaved woodlands, although significant areas
of coniferous planting can be found around Sywell Airport, including Hardwick Wood,
Hardwick Short Wood and Sywell Wood; these all comprise ancient woodland. Other
ancient woodlands in the area include Covert, Fraxton Corner, Mawsley Wood, Short
Wood, Badsaddle Wood, Withmale Park Wood and Bush Walk, representing areas that
are likely to have once formed part of more extensive woodlands. Well treed stream
sides and occasional mature and semi-mature oak and ash in hedgerows also
contribute to the overall woodland cover. Although views are generally extensive from
the plateau areas, in places woodland cover contains views, resulting in a more
intimate character.
Many of the village settlements display a compact, linear form, such as the village of
Harrington, and this comprises the principal settlement pattern. There are exceptions,
however. Brixworth, the largest settlement in the area is a compact village with an
historic core and warm, pale orange ironstone evident in many buildings, and post war
expansions to the south. Holcot, on the edge of the character area, is also a compact
village that has developed around a number of road junctions. Of particular note in
Brixworth is All Saints Church, one of the finest Anglo-Saxon churches in England, and is
still in use. Beyond this, scattered farms and dwellings predominate, frequently located
adjacent to minor country roads that criss cross the landscape, generally following the
main southwest grain of the plateau and located on interfluves between
watercourses. The most prominent main road in the area is the A43(T), from which minor
roads emerge at right angles. This runs along the spine of the plateau and is intrusive in
a number of views, along with high voltage pylons that cross the landscape. Church
spires and towers are also prominent within the landscape, including the spire at
Walgrave and square tower at Broughton, though this is beyond the area boundary.
Water towers can also been seen on the horizon in a number of locations. There are a
limited number of heritage features on the Sywell Plateau. The most notable include
limited areas of ridge and furrow; the site of the medieval village of Faxton, and
Lamport Hall, a Grade I listed house that was the home of the Isham family from 1560
to 1976.�
Overstone Green � Landscape Scoping Report
Client: Davidsons Developments & Gallagher Estates
REF: GL0894 22 DATE: MAY 2018
Local Level
4.7 At a local level the site has been considered as part of the Daventry Landscape Character
Assessment 2017. The broad LCT area and more considered LCA areas in this study broadly
replicate those identified in the wider County assessment. Likewise, the LCT key
characteristics are similar. In this assessment the southern part of the site is identified within
LCT 4 Rolling Ironstone Valley Slopes and LCA Area 4b Moulton Slopes that is assessed as
having a moderate to weak landscape condition stating:
�Wooded edges to historic parks are intact. Arable fields and the hedgerow network
are generally well maintained although there are places where these are becoming
fragmented.�
4.8 The assessment sets out a landscape strategy for this area, but it is focussed primarily on
the landscapes of Moulton and Pitsford, and the potential effects of the proposed
Northampton Northern Orbital Route (NNOR). There is not mention of the NNSUE in the
landscape strategy.
4.9 The very northern extent of the site is located within LCT 5 Clay Plateau and LCA 5b Sywell
Plateau that is assessed as having a moderate condition stating:
�The majority of landscape features are well managed although there is evidence of
hedgerow fragmentation and a loss of hedgerow trees around larger fields.�
4.10 Also, as at local level the Northampton Landscape Sensitivity and Green Infrastructure
Study 2009 (LSGI) considered the setting of the site and its associated landscape sensitivity.
This study considers the green infrastructure network that exists within the landscape, its
biodiversity, cultural heritage, landscape, and flooding/mineral resource sensitivity, and
concludes by setting out an overall sensitivity map for the study area. The site is identified
as being within an area of high-moderate sensitivity, an assessment similar to much of the
wider rural landscape surrounding Northampton. Tract of high sensitivity landscapes are
identified that are generally associated with the main watercourses and the Brampton
Valley to the north-west of Northampton. There are smaller area of medium and low
sensitivity landscapes and these tend to be associated with the main urban form.
4.11 The assessment of landscape effects will consider the findings of these studies alongside a
more detailed assessment of the immediate character of the site. As part of this study a
landscape strategy will be formulated taking into consideration primary mitigation
measures that will include the type, scale, appearance and siting of the proposed
Overstone Green � Landscape Scoping Report
Client: Davidsons Developments & Gallagher Estates
REF: GL0894 23 DATE: MAY 2018
development and its associated open spaces, and secondary mitigation measures in the
form of structural planting, planting character, and landscape management. The
assessment will consider the likely effects arising from the construction process, the
operation scheme, and long-term effects (year 15).
Overstone Green � Landscape Scoping Report
Client: Davidsons Developments & Gallagher Estates
REF: GL0894 24 DATE: MAY 2018
5 VISUAL SETTING
5.1 A Zone of Theoretical Visibility (ZTV) plan has been produced as part of this landscape
scoping report. The ZTV plan identifies the theoretical visibility of the site in its existing state
as farmland, and the potential visibility of the development scenario of up to 10m in height
above existing ground levels.
5.2 The ZTV model have been produced in accordance with GLVIA3 guidance adopting a
multiple point assessment using a 50m grid across the study area with an assumed eyelevel
of 1.7m above existing ground level. The ZTV adopts a bare earth scenario (i.e does not
account for the buffering and screening provided by features such as buildings,
woodland, trees, and hedgerows.
5.3 The ZTV provides the starting point for the identification of representative views in the field
that will be the basis for making judgements against the likely visual effects arising from the
development.
5.4 It is anticipated that the number and location of representative views will not be dissimilar
to those used in the assessment of visual effects in the Pegasus LVIA.
5.5 The ZTV shows the likely visual envelope of the site and development being constrained to
the north-west by the ridgeline that separates the local landscape setting of the site from
Pitsford Reservoir beyond. The ZTV identifies possible views from the ridgelines to the east
of Brixworth and south of Walgrave.
5.6 To the south the visual envelope will be restricted by the built-up fringes of Northampton
and Moulton, and further to the south-east by the wooded setting of Overtone Park. To
the eats the ZTV identifies possible views from the ridgelines to the east and west of Mears
Ashby, and to the south-east the fringes of Earls Barton. In reality these views are likely to
be heavily restricted by intervening vegetation cover.
5.7 To the north and north-east the visual envelope of the site is contained by the local setting
of landform. In reality this will be further reinforced by the large woodland blocks of Sywell
Wood and Hardwick Wood.
5.8 Representative views will be taken from public rights of way, the public highway, and
public access land and assessed against the methodology set out in this report.
Overstone Green � Landscape Scoping Report
Client: Davidsons Developments & Gallagher Estates
REF: GL0894 25 DATE: MAY 2018
6 CUMMULATIVE AND IN COMBINAITON EFFECTS
6.1 This site has already been the subject of a recent cumulative assessment of likely
landscape and visual effects.
6.2 As part of this scoping exercise we would request that the Local Authority identifies any
committed developments, or proposal under consideration that should be assessed in
combination with this proposal.
6.3 The assessment of cumulative landscape and visual effects carried out in the Pegasus CE
will be taken into consideration as part of this LVIA.
Overstone Green � Landscape Scoping Report
Client: Davidsons Developments & Gallagher Estates
REF: GL0894 DATE: MAY 2018
Figures
Key
Site boundary
tel: 01530 265688 email: [email protected] web: www.golbyandluck.co.ukThis drawing has been produced by GOLBY AND LUCK LTD © all rights reserved: 207 Leicester Road, Ibstock, Leicestershire LE67 6HP
no
rth
Licence No. 100053702Scale
1:25000@A2Date
03/05/2018Checked
SG
Number/Figure
GL0894 01Project
Drawing title
Overstone Green
Site Context
Client
Davidsons Developments Ltd& Gallagher Estates
l a n d s c a p e a r c h i t e c t sl a n d s c a p e a r c h i t e c t s
golby luck+
Scale
1:10000@A2Date
03/05/2018Checked
SG
Number/Figure
GL0894 02
Key
Site boundary
tel: 01530 265688 email: [email protected] web: www.golbyandluck.co.ukThis drawing has been produced by GOLBY AND LUCK LTD © all rights reserved: 207 Leicester Road, Ibstock, Leicestershire LE67 6HP
no
rth
Project
Drawing title
Overstone Green
Site Location
Client
Davidsons Developments Ltd& Gallagher Estates
l a n d s c a p e a r c h i t e c t sl a n d s c a p e a r c h i t e c t s
golby luck+
Licence No. 100053702
The Zone of Theoretical Visibility (ZTV) has been based on the proposed development parameters mapping the broad areas of development at the specified heights adopting a ‘bare earth’ policy. Eye height has been set at 1.7m AOD.
This ZTV has been run using a multiple point analysis mapped at 50m intervals across the study area. This ZTV has been produced using LSS Elite digital terrain modelling software.
Key
Site boundary
tel: 01530 265688 email: [email protected] web: www.golbyandluck.co.ukThis drawing has been produced by GOLBY AND LUCK LTD © all rights reserved: 207 Leicester Road, Ibstock, Leicestershire LE67 6HP
no
rth
Zone of theoretical visibility - baseline setting of undeveloped site
Zone of theoretical visibility - up to10m development height range across site
Licence No. 100053702Scale
1:25000@A2Date
03/05/2018Checked
SG
Number/Figure
GL0894 07Project
Drawing title
Overstone Green
Zone of Theoretical Visibility(ZTV)Client
Davidsons Developments Ltd& Gallagher Estates
l a n d s c a p e a r c h i t e c t sl a n d s c a p e a r c h i t e c t s
golby luck+
REF: GL0084 DATE: NOVEMBER 2013 (AMENDED: MARCH 2014)
l a n d s c a p e a r c h i t e c t s
golby luck+
T e l : 0 1 5 3 0 2 6 5 6 8 8 W e b : w w w . g o l b y a n d l u c k . c o . u k
E m a i l : i n f o @ g o l b y a n d l u c k . c o . u k
Of f ice : 2 07 Le ice s te r Ro ad, I b s tock , Le ice ste r sh i r e , LE 67 6 HP
G ol by an d Luck L TD (C om pany No . 90 377 76 ) Reg i s t e r e d in Eng l and an d Wal e s
Appendix D
Ecology Input into ES Scoping
Aspect Ecology ● Hardwick Business Park ● Noral Way ● Banbury ● OX16 2AF ● Tel: 01295 276066 ● www.aspect-ecology.com
Technical Briefing Note
Project: Overstone Green, Northampton
TN1: Ecology Input into ES Scoping Date: 3 May 2017
Ecology scoping request The Environmental Statement chapter would cover potential effects relating to ecology at the site. Key ecology legislation, policy and professional best-practice guidance will inform and guide the assessment works, notably including:
• The Conservation of Habitats and Species Regulations, 2010 (as amended);
• The Wildlife and Countryside Act, 1981 (as amended);
• The Countryside and Rights of Way Act, 2000;
• The Natural Environment and Rural Communities Act, 2006;
• Town and Country Planning (Environmental Impact Assessment) Regulations, 2011;
• The Hedgerows Regulations, 1997;
• The Protection of Badgers Act, 1992;
• The Wild Mammals (Protection) Act, 1996;
• National Planning Policy Framework (NPPF); and
• CIEEM ‘Guidelines for Ecological Impact Assessment in the United Kingdom’ (CIEEM, 2016).
Baseline Conditions The site has been subject to a desktop study and an extended Phase Habitat Survey in March 2018 in order to ascertain the general ecological value of the land contained within the boundaries of the site and to identify the main habitats and ecological features present. The site was surveyed based on standard Phase 1 Habitat Survey methodology, and extended, in line with the Guidelines for Preliminary Ecological Appraisal. In terms of designations, no statutory designations have been identified within or adjacent to the site. The nearest statutory designation to the site is Crowfields Common Local Nature Reserve, located approximately 1.4km from the site, whilst the nearest European-level designation is the Upper Nene Valley Gravel Pits Ramsar and Special Protection Area (SPA), located approximately 7.3km from the site. The majority of the site is considered to be of low ecological value, being dominated by intensively managed arable land. Habitats of elevated value are present within the site, in the form of hedgerows, trees and the watercourse and woodland habitats associated with the non-statutory designation, Cowpasture Spinney Local Wildlife Site (LWS), which is in part located in the east of the site.
Overstone Green, Northampton
1001812 TN1 Ecology Input into ES Scoping vf 2
In terms of fauna, the site is considered to provide opportunities for Badger, roosting bats in buildings and trees, foraging and commuting bats, birds (including nesting Barn Owl) and reptiles. Specific Phase 2 survey work is therefore proposed to be undertaken at the site this year during the appropriate seasonal window and in line with best practice guidance. Assessment Methodology Evaluation of Ecological Baseline The evaluation of ecological features and resources should be based on sound professional judgement whilst also drawing on the latest available industry guidance and research. The approach taken will be based on that described in ‘Guidelines for Ecological Impact Assessment in the UK and Ireland’ published by the Chartered Institute of Ecology and Environmental Management (CIEEM) in 2016 whereby important ecological features are identified, and these are considered within a defined geographical context using the following frame of reference:
• International;
• National;
• Regional;
• County;
• District;
• Local; or
• Site (not of elevated importance at a local level).
Features considered to be of importance at the Site level only will be scoped out of this assessment (with the exception of protected species which are considered in terms of mitigation and any legislative requirements). Assessment of Impacts and Significance The CIEEM publication ‘Guidelines for Ecological Impact Assessment in the UK and Ireland’ (2016) also sets out a methodology for the assessment of potential effects arising from development. These methods are followed which can be summarised as below. Using the agreed parameters of the scheme, likely effects are determined with reference to aspects of the ecological structure and function on which the feature or resource depends. This includes factors such as the available resources, ecological processes, human influences, historical context, ecological relationships, ecological role or function and ecosystem properties. Based on this context, the nature of the effect is characterised and considered under the following parameters:
• Positive or negative – will the activity lead to an adverse, beneficial or neutral effect;
• Extent – the size or amount of an impact, the area of habitat or number of individuals affected;
• Duration – the time for which the impact is expected to last prior to recovery or replacement,
i.e. short-term or long-term;
• Reversibility – an effect may be irreversible in that recovery is not possible within a reasonable
timescale or there is no reasonable chance of action being taken to reverse it, i.e. permanent
or temporary; and
• Timing and frequency – some changes may only cause an impact if they coincide with critical
life-stages or seasons, whilst frequent events may cause a greater effect than a single event.
Overstone Green, Northampton
1001812 TN1 Ecology Input into ES Scoping vf 3
Based on these parameters, the scale of effect (or magnitude) can be summarised as follows. This is in relation to adverse effects, although a similar scale can be applied to beneficial effects.
Table 1.1. Assessment of scale of effect.
Scale of impact
Nature of effect
Substantial A permanent or long-term effect on the receptor, which may result in severe damage to key characteristics and implications for the integrity of the receptor or its conservation status.
Moderate Impacts resulting in partial loss of or damage to a receptor, which could have implications for the integrity of the receptor or its conservation status.
Slight Short-term or temporary impacts resulting in only minor loss of or damage to a receptor, unlikely to have implications for the integrity of the receptor or its conservation status.
Negligible No effect or only a short-term reversible impact with no long-term effect on the receptor.
Based on the nature of the effect, an assessment is then made on whether the effect on a habitat or species is likely to be ecologically ‘significant’. CIEEM guidance defines a ‘significant effect’ as “an effect that either support or undermines biodiversity conservation objectives for ‘important ecological features’ or for biodiversity in general”, going on to state that “significant effects encompass impacts on structure and function of defined sites, habitats or ecosystems and the conservation status of habitats and species (including extent, abundance and distribution).” Significance is also assessed at an appropriate geographic scale. For example, a significant effect on a Site of Special Scientific interest (SSSI) would be of national significance. Notwithstanding this however, consideration is also given to whether an effect is significant at a scale below the geographic context in which the feature is considered important. For some ecological features (notably designations), there may be an existing statement of the conservation status of a feature and objectives and targets against which the effect can be judged. For example, Sites of Special Scientific Interest (SSSI) are assessed under six condition categories, namely favourable, unfavourable recovering, unfavourable no change, unfavourable declining, part destroyed, and destroyed. An effect that exerts a change between these condition categories would be considered as significant. Where no existing statement of conservation status is available, an assessment is made against the existing status and condition of the habitat or species population, as recorded by survey data and background information, taking into account the level of ecological resilience or existing conditions that a habitat or species is currently subject to. An effect resulting in a long-term change to the existing background population trend or status at a given geographical level would be considered as significant. In this regard, a significant beneficial impact could be defined as one that prevents or slows an existing decline in the favourable conservation status of a habitat or population as much as one that permitted a population or habitat area to increase. The likelihood or uncertainty of an effect occurring as predicted is also considered. To assist with defining certainty, the following scale is used (with broad confidence levels indicated):
• Certain/near-certain - probability estimated at 95% chance or higher;
• Probable - probability estimated above 50% but below 95%;
• Unlikely - probability estimated above 5% but less than 50%; or
• Extremely unlikely - probability estimated at less than 5%.