Preliminary Arboricultural Impact Assessment€¦ · Protected Species 2.3 Nesting birds are...

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BARROW LANDS COMPANY LIMITED Preliminary Arboricultural Impact Assessment Prepared by Bowland Tree Consultancy Ltd June 2012 PROPOSED DEVELOPMENT OF LAND TO THE WEST OF WHALLEY ROAD, BARROW, LANCASHIRE

Transcript of Preliminary Arboricultural Impact Assessment€¦ · Protected Species 2.3 Nesting birds are...

Page 1: Preliminary Arboricultural Impact Assessment€¦ · Protected Species 2.3 Nesting birds are afforded statutory protection under the Wildlife & Countryside Act (1981) (as amended)

BARROW LANDSCOMPANY LIMITED

Preliminary Arboricultural Impact Assessment

Prepared by Bowland Tree Consultancy LtdJune 2012

PROPOSED DEVELOPMENT OF LAND TO THE WESTOF WHALLEY ROAD, BARROW, LANCASHIRE

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PRELIMINARY ARBORICULTURAL IMPACT ASSESSMENT LAND OFF WHALLEY ROAD, BARROW

Control sheet

Project No.: BTC272

Project Title: Preliminary Arboricultural Impact Assessment - Land off Whalley Road, Barrow

Client: The Barrow Lands Company Ltd

Agent: David Lock Associates

Local Planning Authority: Ribble Valley Borough Council

Date of Original Survey: March & April 2010

Date of Survey Review: December 2011

Prepared by: Phill Harris MSc BSc(Hons) HND CEnv MArborA MICFor Chartered Arboriculturist

Date of Issue: 28 June 2012

Status: Final

Version No: 1

Revisions: 0

Contact Details

Bowland Tree Consultancy Ltd 21 Meadowside Grindleton Clitheroe Lancashire BB7 4RR

T: 01200 441117 E: [email protected]

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DISCLAIMER

Survey Limitations: Unless otherwise stated all trees are surveyed from ground level using non-invasive techniques, in sufficient detail to gather data for and inform the design of the current project only. The disclosure of hidden crown and stem defects, in particular where they may be above a reachable height or where trees are ivy clad or in areas of ground vegetation, cannot therefore be expected. All obvious defects, however, are reported. Detailed tree safety appraisals are only carried out under specific written instructions. Comments upon evident tree safety relate to the condition of said tree at the time of the survey only. Unless otherwise stated all trees should be re-inspected annually in order to appraise their on-going mechanical integrity and physiological condition. It should, however, be recognised that tree condition is subject to change, for example due to the effects of disease, decay, high winds, development works, etc. Changes in land use or site conditions (e.g. development that increases access frequency) and the occurrence of severe weather incidents are also significant considerations with regards tree structural integrity and trees should therefore be re-assessed in the context of such changes and/or incidents and inspected at intervals relative to identified and varying site conditions and associated risks.

Where trees are located wholly or partially on neighbouring private third-party land then said land is not accessed and our inspection is therefore restricted to what can reasonably be seen from within the site. Stem diameters of trees located on such land are estimated. Any subsequent comments and judgments made in respect of such trees are based on these restrictions and are our preliminary opinion only. Recommendations for works to neighbouring third-party trees are only made where a potential risk to persons and/or property has been identified during our survey or, if applicable, where permissible works are required to implement a proposed development. Where significant structural defects of third-party trees are identified and associated management works are considered essential to negate any risk of harm and/or damage then we will first attempt to inform the site occupier of the issues and, if not possible, then inform the relevant Council. Where a more detailed assessment is considered necessary then appropriate recommendations are set out in the Tree Survey Schedule.

Where tree stem locations are not included on the plan(s) provided then they are plotted at the time of the survey using, where appropriate and/or practicable, a combination of measurement triangulation and GPS co-ordination. Where this is not possible then locations are estimated. Restrictions in these respects are detailed in the report.

The potential influence of trees upon buildings or other structures resulting from the effects of their roots abstracting water from shrinkable load-bearing soils is not considered herein. The advice of a structural engineer should be sought with regard to appropriate foundation depths for new buildings with reference to NHBC Standards Chapter 4.2 (NHBC, 2008).

Copyright & Non-Disclosure Notice: The content and layout of this report are subject to copyright owned by Bowland Tree Consultancy Ltd, save to the extent that copyright has been legally assigned to us by another party or is used by Bowland Tree Consultancy Ltd under license. This report may not be copied or used without our prior written agreement for any purpose other than those indicated.

Third Parties: Any disclosure of this document to a third party is subject to this disclaimer. The report was prepared by Bowland Tree Consultancy Ltd at the instruction of and for use by our client, as named. This report does not in any way constitute advice to any third party who is able to access it by any means. Bowland Tree Consultancy Ltd excludes to the fullest extent lawfully permitted all liability whatsoever for any loss or damage arising from reliance on the contents of this report.

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PRELIMINARY ARBORICULTURAL IMPACT ASSESSMENT LAND OFF WHALLEY ROAD, BARROW

CONTENTS Page

1.0 INTRODUCTION ........................................................................................................................1Terms of Reference ..................................................................................................................1Scope and Purpose of Report ................................................................................................. 1Site Visit, Data Collection and Tree Impact Plan.................................................................... 1

2.0 STATUTORY PROTECTION IN RESPECT OF TREES AND ASSOCIATED WILDLIFE .........2Tree Preservation Orders and Conservation Area Designations ......................................... 2Protected Species .....................................................................................................................2Felling Licences ........................................................................................................................2

3.0 THE SITE AND THE SURROUNDINGS .................................................................................... 24.0 THE TREE POPULATION .......................................................................................................... 35.0 THE DEVELOPMENT PROPOSAL AND ITS PROJECTED ARBORICULTURAL IMPACTS . 5

Mitigation for Projected Tree Losses as Part of Site Landscaping ...................................... 56.0 RECOMMENDATIONS FOR SUCCESSFUL TREE RETENTION IN THE CONTEXT OF

DEVELOPMENT .........................................................................................................................6Root Protection Areas and Construction Exclusion Zones .................................................. 6Underground Utilities ...............................................................................................................6Arboricultural Method Statement (AMS) and Tree Protection Plan (TPP) ........................... 6

7.0 OTHER RECOMMENDATIONS ................................................................................................. 6Non-Development Related Tree Works and Recommendations .......................................... 6Tree Work Related Consents ................................................................................................... 7Arboricultural Contractors .......................................................................................................7Contractors and Subsequently Identified Tree Defects ........................................................ 7New Tree Planting .....................................................................................................................7Retained Tree Management ..................................................................................................... 7

8.0 SUMMARY AND CONCLUSIONS ............................................................................................. 7REFERENCES ..................................................................................................................................8

APPENDICES APPENDIX ONE: .................................... TREE SURVEY SCHEDULE & BS5837:2005 - TABLE 1 APPENDIX TWO: ................................... TEMPORARY PROTECTIVE FENCING SPECIFICATION

PLANPLAN ONE: ......................................................................................... TREE CONSTRAINTS PLAN PLAN TWO: ..................................................................................... ILLUSTRATIVE MASTERPLAN

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1.0 INTRODUCTION

Terms of Reference

1.1 Bowland Tree Consultancy Ltd is commissioned by the Barrow Lands Company Ltd to: a) Survey, from ground level, all trees having reasonable potential to be adversely affected

by or to affect the proposed site development; b) Prepare a tabulated Tree Survey Schedule based on guidance specified in British

Standard BS5837:2005 - Trees in Relation to Construction – Recommendations; c) Broadly evaluate the tree related impacts and potential design conflicts of the proposal; d) Advise on removal, retention and management options for the trees in the current

context and in the context of the proposed development; e) Assess the tree protection measures required during the proposed development; f) Annotate the site proposal plan to identify tree numbers, retention categories, crown

spreads and Root Protection Areas to indicate tree related constraints in order to produce a Tree Constraints Plan; and

g) Produce an Arboricultural Impact Assessment (AIA) report outlining the main tree related issues and potential tree related impacts in relation to the development proposal and suitable mitigation and/or protection measures.

Scope and Purpose of Report

1.2 By detailing foreseeable tree related issues this report is intended to assist the Local Planning Authority (LPA) in their review of the proposed development and, as such, should be supplied to them in support of the planning application to which it pertains. Essentially, the report provides a preliminary analysis of the impacts that the proposed development would potentially have on trees and offers guidance on suitable tree management, mitigation for losses and appropriate tree protection measures in the context of the proposed development. It should be noted that, although the report is dated June 2012, the surveys relating to the appraisal were carried out during 2010 and 2011, prior to the updated version of the British Standard (BS5837:2012) coming into effect and, as such, is therefore based on the preceding 2005 guidance (BS5837:2005).

Site Visit, Data Collection and Tree Impact Plan

1.3 Further to this instruction I confirm that I initially visited the site during March and April 2010 and carried out an appraisal of trees, as detailed above and in accordance with the preceding disclaimer. A site visit was then made during December 2011 in order to review the initial survey, and the data was subsequently updated accordingly where changes in tree condition had occurred in the interim. All tree data collected on site is set out in the attached tabulated Tree Survey Schedule (TSS) at Appendix One which, for ease of interpretation, should be read alongside the associated BS5837:2005 Table 1.

1.4 During my survey I identified 89 individual trees (prefixed ‘T’), four groups of trees (prefixed ‘G’) and three woodland areas (prefixed ‘W’), and have numbered them accordingly on the appended Tree Constraints Plan (TCP). The TCP is based on a topographical survey plan that was provided in electronic format by the client and, for the purpose of this report, the plan details are presumed to be accurate. The TCP details the existing site with the readily definable tree constraints which, when compared against the Illustrative Masterplan (at Plan Two), allows a preliminary appraisal of the development’s potential impacts on trees (see section 5) and a subsequent evaluation of tree protection requirements, tree work needs and provisions for mitigation. The constraints relating to tree Root Protection Areas (RPAs) and their protection requirements are discussed in detail at paragraphs 6.1 and 6.2.

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2.0 STATUTORY PROTECTION IN RESPECT OF TREES AND ASSOCIATED WILDLIFE

Tree Preservation Orders and Conservation Area Designations

2.1 The Town & Country Planning Act (1990) (the Act) and associated Regulations empower Local Planning Authorities (LPAs) to protect trees in the interests of amenity by making Tree Preservation Orders (TPOs). The Act also affords protection for trees of over 75mm diameter that stand within the curtilage of a Conservation Area (CA). Subject to certain exemptions, an application must be made to the LPA in question to carry out works upon or to remove trees that are subject to a TPO, whilst six weeks’ notice of intention must be given to carry out works upon or to remove trees within a CA that are not protected by a TPO. However, in situations where full planning permission has been granted and protected trees directly affect the implementation of the approved development, then it is permissible to carry out any works necessary to the subject trees in order to implement the development.

2.2 The site does not stand within a CA, and I am not aware of a TPO covering the trees at the site. As such, it is essential to contact the Planning Department of Ribble Valley BC in order to confirm if any statutory protection exists prior to scheduling or carrying out any tree works.

Protected Species

2.3 Nesting birds are afforded statutory protection under the Wildlife & Countryside Act (1981) (as amended) and their potential presence should therefore be considered when clipping hedges, removing climbing plants and pruning and removing trees. Hedges provide valuable nesting sites for many birds and clipping should therefore be avoided during March to July. Trees, hedges and ivy should be inspected for nests prior to pruning or removal and any work likely to destroy or disturb active nests should be avoided until the young have fledged.

2.4 All bat species are protected under Schedule 5 of the Wildlife & Countryside Act (1981) (as amended) and under Schedule 2 of the Conservation of Habitats and Species Regulations 2010. In this respect it should be noted that it is possible that unidentified bat habitat features may be located high up in tree crowns and all personnel subsequently carrying out tree works at the site should therefore be vigilant and mindful of the possibility that roosting bats may be present in trees with such features. If any bat roosts are identified then it is essential that works are halted immediately and that a suitably qualified and experienced ecologist investigates and advises on appropriate action(s) prior to works continuing.

Felling Licences

2.5 Subject to certain exemptions the Forestry Act (1967) requires that a ‘Felling Licence’ be obtained to fell growing trees amounting to specific volumes of timber. Felling Licences are administered by the Forestry Commission and contravention of the associated controls can incur substantial penalties. A Felling Licence is not needed for the removal of trees immediately required for the purpose of carrying out a development authorised by detailed (i.e. full) planning permission granted under the Act (1990). However, I would note that this does not apply to outline planning permission, as sought in this instance.

3.0 THE SITE AND THE SURROUNDINGS

3.1 The site is located within a rural edge area to the south-west of the village of Barrow, Lancashire, approximately 4 kilometres due south of the centre of Clitheroe, the Council’s administrative town. It consists of various fields that are under agricultural usage and divided by ditches, hedgerows and fences, with individual trees and groups of trees throughout and a woodland belt to the north and a woodland belt to the south-east (see Fig.

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1, below). Topography throughout the most of the site is evidently relatively level, although there is a small earth bund of several metres in height within its north-eastern section.

3.2 The site is bordered to the north-east by moderate density residential properties with gardens, to the north by a stream, allotments and open agricultural fields, to the east by Whalley Road with residential and commercial development beyond, to the south by open agricultural fields, and to the west by open agricultural fields and a railway line. A biological heritage site stands immediately adjacent to the south-western corner of the site. Vehicular access is available via three gated farm tracks off Whalley Road, with one in the north-eastern corner of the site, one to the centre and one in the south-eastern corner. A public footpath runs from Whalley Road in the centre of the site in an east/west direction, until close to the western boundary where it turns to run north-east/south-west, exiting the site in the south-western corner. A further public footpath runs along the southern boundary.

Fig 1: The northern section of the site, looking north with woodland belt W3 in view

3.3 A detailed landscape character appraisal of the locality was not carried out as part of this assessment, although I did make a general appraisal of the visual amenity that the trees within the site confer on the locality based on their visual prominence and overall contribution to the landscape, as discussed in paragraph 4.3.

4.0 THE TREE POPULATION

4.1 As noted previously, 89 individual trees, four groups of trees and three woodland areas were surveyed for the purpose of this appraisal, of which the majority are located within the site boundaries. The surveyed individual trees consist of several deciduous broadleaf and evergreen coniferous species, being common oak, ash, common alder, Scot’s pine and goat willow, with oak and ash forming the majority of the numbers. Only a very small percentage of the surveyed trees are of non-native species.

4.2 Tree sizes range from small to very large, with most individuals being moderate to large, and ages from young to post-mature, with the majority being in the early-mature to mature age range. Several trees may be considered to have attained veteran age due to their dimensions and apparent life stages, although I would note that I did not carry out any individual assessments of such status. The trees stand at heights of up to 24.5 metres,

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have maximum diametrical crown spreads of up to 28.5 metres and stem diameters of up to 1.6 metres.

4.3 The trees stand as individuals and as components of wider groups and of woodland belts. Most of the individual trees within the site boundaries, as well as the groups and woodland belts, are visible from the public footpaths and/or from Whalley Road, and form distinct and important landscape features of the local area. In consideration of these factors it is evident that, as a whole, the trees on site confer a high visual amenity in the immediate and the wider local landscape (see Fig. 1, previous page, and Fig. 2, below).

Fig. 2: Oak tree T75, as seen from the south looking north

4.4 Detailed tree dimensions and other pertinent information such as structural defects and physiological deficiencies are included in the Tree Survey Schedule (TSS) at Appendix One. In respect of the TSS it should be noted that tree quality is categorised within the existing context without taking any site development proposals into account. However, recommendations for works included in the TSS take both current site usage into consideration and the proposed site development where there are definable development related issues with regard to specific trees.

4.5 The TSS includes a column (‘Cat. Grade’) listing the trees’ respective retention values, where they are rated either ‘A’, ‘B’, ‘C’ or ‘R’, as per BS5837:2005 Table 1 (Appendix One). ‘A’ category trees are those considered to be of ‘high quality and value’ and, accordingly, the most suitable for retention and ‘B’ category trees are those considered to be of ‘moderate quality and value’. ‘C’ category trees are those considered to be of ‘low quality and value’ which, as stated in BS5837:2005 Table 1, “will usually not be retained where they would pose a significant constraint on development”. In turn, ‘R’ category trees are those that are in relatively poor condition whereby they should be removed for reasons of sound arboricultural management regardless of any plans for development of the site.

4.6 As detailed in Table A (overleaf) 23 trees, three groups and three woodlands were allocated high retention values of ‘A’, 26 trees and one group were allocated moderate retention values of ‘B’ and 25 trees were allocated low retention values of ‘C’. In addition, 15 trees were allocated ‘R’ categorisations due to short projected remaining safe life expectancies for various reasons including poor physiological and/or structural condition, and are therefore recommended for removal regardless of the proposal.

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Table A: BS5837-2005 Retention Categories of the Surveyed Trees Ret.

Cats. Tree/Group/

Woodland Numbers Totals

Trees, groups & woodlands of a moderate or high quality &

value that should be afforded appropriate consideration in the

context of development

'A’ T2, T8, T11, T13, T14, T16, T17, T20,

T26, T28, T29, T32, T36, T40, T42, T50, T70, T71, T73, T75, T77, T81,

T83, G1, G2, G3, W1, W2, W3

23 Trees (25.9%) 3 Groups (75%)

3 Woodlands (100%)

‘B’T4, T7, T10, T18, T19, T24, T33, T35,

T38, T42, T43, T44, T45, T48, T54, T55, T62, T64, T65, T66, T74, T79,

T80, T85, T86, T89, G1

26 Trees (29.2%) 1 Group (25%)

Trees, groups & woodlands of a low quality & value that should

not be considered a material constraint to development

‘C’T3, T5, T9, T12, T15, T21, T22, T25, T30, T31, T34, T37, T39, T46, T51, T52, T53, T56, T60, T67, T72, T76,

T78, T82, T84

25 Trees (28.1%)

Trees, groups & woodlands that should be removed for sound

management reasons regardless of site plans

‘R’ T1, T6, T23, T27, T47, T49, T57, T58, T59, T61, T63, T68, T69, T87, T88 15 Trees (16.8%)

= 89 Trees, 4 Groups & 3

Woodlands in Total

5.0 THE DEVELOPMENT PROPOSAL AND ITS PROJECTED ARBORICULTURAL IMPACTS

5.1 The application is for outline planning permission for a residential development with all matters other than the access reserved. Accordingly, I have been provided with an Illustrative Masterplan (at Plan Two) to that effect, as prepared by Levitt Bernstein Architects and appended at Plan 2. Vehicular access is proposed from three points off Whalley Road to the east, as detailed on the Illustrative Masterplan.

5.2 As the Masterplan is illustrative in nature I have not made a detailed appraisal of the development’s potential impacts on individual trees. However, it is evident that the proposal includes provision and the ability to retain the majority of the large trees on site and incorporate them into areas of public open space or suitably sizeable gardens. It is therefore important that, if outline permission is granted, then the subsequent detailed development proposals should include adequate provision for the incorporation of the ‘A’ and ‘B’ category trees into the design, along with sufficient detail regarding the specifics of how these trees are to be retained successfully (e.g. through the protection of their Root Protection Areas, as discussed in section 6). This could be covered and controlled via a suitably worded planning condition on the outline planning permission.

Mitigation for Projected Tree Losses as Part of Site Landscaping

5.3 Extensive new tree planting should be included as part of any subsequent detailed development proposals and the associated landscape scheme, to be submitted and approved at ‘reserved matters’ stage. In consideration of the character of the surroundinglocal rural landscape it is my opinion that such a scheme should include a substantial percentage of trees of locally native species such as holly, whitebeam, ash, common oak and silver birch. The provision of locally native trees would have numerous benefits including maintaining local landscape character, heritage and conservation value and providing important habitat to a wider range of plants and animals than non-native species. Specific tree planting requirements can be conditioned as part of any planning permission. New tree planting is discussed further in paragraph 7.5.

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6.0 RECOMMENDATIONS FOR SUCCESSFUL TREE RETENTION IN THE CONTEXT OF DEVELOPMENT

Root Protection Areas and Construction Exclusion Zones

6.1 Adequate protection of the Root Protection Areas (RPAs) of retained trees during construction is essential if their long-term viability is to be assured. RPAs, which are calculated through a method provided in BS5837:2005, are ground areas that should be protected by temporary protective fencing as Construction Exclusion Zones (CEZs) throughout the development process, thereby keeping the trees’ root zones free from disturbance. Consequently, the RPA distances, as detailed in the TSS (see 6.2, below), give an idea of the on-site below-ground constraints in respect of tree roots and assist in planning for appropriate tree retention in relation to feasible development. In certain situations, there is a limited degree of flexibility in the RPA and CEZ positioning.

6.2 The TSS includes two columns listing the RPAs of the individually surveyed trees and, where applicable, the largest of the trees in any surveyed groups as overall areas in square metres and as radial distances. The radial RPAs are indicated as magenta coloured circles on the TCP. With regard to CEZs the design, materials and construction of the fencing should be appropriate for the intensity and type of site construction works, should conform to at least section 9 of BS5837:2005 and should be agreed with the LPA, which can be secured by the imposition of a suitably worded planning condition on the outline permission. A temporary protective fencing specification is included at Appendix Two and the extents of the RPAs should dictate locations of the CEZs.

Underground Utilities

6.3 The installation of underground utilities in close proximity to trees can cause serious damage to their roots. As such, utilities should be routed outside RPAs unless there is no other available option. Where RPAs cannot be avoided then guidelines set out in the National Joint Utilities Group publication ‘Volume 4: NJUG Guidelines for the Planning, Installation and Maintenance of Utility Apparatus in Proximity to Trees (Issue 2) – Operatives Handbook’ should be followed (e.g. trenches of a very limited width to be hand dug or the use of directional drilling).

Arboricultural Method Statement (AMS) and Tree Protection Plan (TPP)

6.4 BS5837:2005 recommends that, where considered expedient, an AMS and a TPP be prepared detailing “special mitigation construction”. Essentially, the AMS and TPP describe the procedures, working methods and protective measures to be used in relation to retained trees in order to ensure that they are adequately protected during the construction process. Production of and adherence to an AMS and TPP can be conditioned as part of a planning approval if considered necessary.

7.0 OTHER RECOMMENDATIONS

Non-Development Related Tree Works and Recommendations

7.1 Any general management pruning works for retained trees that are stated to be non-development related, as detailed in the TSS, are recommended in accordance with prudent arboricultural management and should therefore be carried out regardless of any site development proposals and potential changes in land usage. All tree works should be carried out in accordance with BS3998:2010 - Tree Work – Recommendations.

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Tree Work Related Consents

7.2 No tree pruning or removal works should commence on site until necessary consents have been obtained from the LPA as part of a planning approval or in respect of any statutory tree protection or controls that may exist.

Arboricultural Contractors

7.3 All tree works should be carried out by suitably qualified and experienced arboricultural contractors carrying appropriate public liability insurance cover and be implemented to the minimum current CE and UK industry standards and in accordance with industry codes of practice. Only certificated personnel should, in accordance with The Control of Pesticides Regulations, apply any pesticides.

Contractors and Subsequently Identified Tree Defects

7.4 Contractors should be made aware that, should any significant tree defects become apparent during operations that would not have been immediately obvious to the surveyor, then such defects should be notified immediately to the client and subsequently confirmed to the consultant within five working days.

New Tree Planting

7.5 All tree planting at the site should be carried out in accordance with BS4428:1989 - Code of Practice for General Landscape Operations, BS3936-1:1992, Nursery Stock – Part 1: Specification for Trees and Shrubs and BS4043:1989, Transplanting Root-Balled Trees where applicable.

Retained Tree Management

7.6 Any tree risk management appraisal and subsequent recommendations made in this report were based on observations and site circumstances at the time of my survey. Trees are dynamic living organisms whose structure is constantly changing and even those evidently in good condition can succumb to damage and/or stress. In this respect I would note that, under the Occupiers’ Liability Act (1957 & 1984), site occupants have a duty of care to take reasonable steps to prevent or minimise the risk of personal injury and/or damage to property from any tree located within the curtilage of the land they occupy. It is accepted that these steps should normally include commissioning a qualified and experienced arboriculturist to survey their trees in order to identify any risk of harm to persons or damage to property that they may present and, where unacceptable risks are identified, taking suitable remedial action to negate those risks.

8.0 SUMMARY AND CONCLUSIONS

8.1 The site in question, at Whalley Road, Barrow, currently consists of several fields with trees and other landscape features and is located in a mixed usage rural edge area in the village of Barrow. 89 individual trees, four groups of trees and three woodlands were surveyed in respect of an outline proposal for a residential development at the site.

8.2 23 trees, three groups and three woodlands were allocated high retention values, 26 trees and one group were allocated moderate retention values, and 25 trees were allocated low retention values. In addition, 15 trees were classed ‘R’ and would normally therefore be recommended for removal in the short term regardless of the proposal.

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8.3 The trees, of which a substantial number are large in size, stand as individuals and as components of groups and woodlands and, as a whole, confer a high visual amenity on the immediate and the wider local landscape.

8.4 An evaluation of the Illustrative Masterplan has indicated that proposed development of the site can be satisfactorily achieved whilst retaining the majority of the large trees on site by incorporating them into areas of public open space or suitably sizeable gardens. It is therefore imperative that any subsequent detailed development proposals include adequate provision for the incorporation of the high and moderate quality trees into the design and that sufficient detail regarding the specifics of how these trees are to be retained and protected successfully is included in support of any such associated reserved matters or further application.

REFERENCES

BS4428:1989 - Code of Practice for General Landscape Operations. BSI British Standards, BS3936-1:1992, Nursery Stock – Part 1: Specification for Trees and Shrubs. BSI British Standards, London. BS3998:2010 - Tree Work - Recommendations. BSI British Standards, London. BS4043:1989 - Transplanting Root-Balled Trees. BSI British Standards, London. BS5837:2005 - Trees in Relation to Construction – Recommendations. BSI, London. National House Building Council (2008). NHBC Standards Chapter 4.2 - Building Near Trees. NHBC, Amersham. National Joint Utilities Group (2007). Volume 4: NJUG Guidelines For The Planning, Installation And Maintenance Of Utility Apparatus In Proximity To Trees (Issue 2) – Operatives Handbook.

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Page 28: Preliminary Arboricultural Impact Assessment€¦ · Protected Species 2.3 Nesting birds are afforded statutory protection under the Wildlife & Countryside Act (1981) (as amended)

BS58

37:2

005 T

able

1 – C

asca

de C

hart

for T

ree Q

ualit

y Ass

essm

ent

Tree

s for

rem

oval

Cate

gory

and

defin

ition

Cr

iteria

Id

entif

icatio

n on

plan

Ca

tego

ry R

Th

ose i

n suc

h a co

nditio

n tha

t any

ex

isting

value

wou

ld be

lost

withi

n 10

year

s and

whic

h sho

uld, in

the

curre

nt co

ntext,

be re

move

d for

re

ason

s of s

ound

arbo

ricult

ural

mana

geme

nt

�Tr

ees t

hat h

ave s

eriou

s, irr

emed

iable,

stru

ctura

l defe

ct, su

ch th

at the

ir ear

ly los

s is e

xpec

ted du

e to c

ollap

se,

includ

ing th

ose t

hat w

ill be

come

unvia

ble af

ter re

mova

l of o

ther R

categ

ory t

rees

such

as w

here

, for w

hatev

er

reas

on, th

e los

s of c

ompa

nion s

helte

r can

not b

e mitig

ated b

y pru

ning

�Tr

ees t

hat a

re de

ad or

are s

howi

ng si

gns o

f sign

ifican

t, imm

ediat

e, an

d irre

versi

ble ov

erall

decli

ne

�Tr

ees i

nfecte

d with

patho

gens

of si

gnific

ance

to th

e hea

lth an

d/or s

afety

of oth

er tr

ees n

earb

y, for

exam

ple D

utch

Elm

Dise

ase,

or ve

ry low

quali

ty tre

es su

ppre

ssing

adjac

ent tr

ees o

f bett

er qu

ality

Note

– Hab

itat r

einsta

temen

t may

be ap

prop

riate.

For

exam

ple R

categ

ory t

ree u

sed a

s a ba

t roo

st: in

stalla

tion o

f bat

box i

n nea

rby t

ree.

Dark

Red

Tree

s to

be co

nsid

ered

for r

eten

tion

Cate

gory

and

defin

ition

Ca

tego

ry –

Subc

ateg

ories

Id

entif

icatio

n on

plan

1.

Main

ly ar

boric

ultu

ral v

alues

2.

Main

ly lan

dsca

pe va

lues

3.

Main

ly cu

ltura

l valu

es,

inclu

ding

cons

erva

tion

Cate

gory

A

Thos

e of h

igh qu

ality

and v

alue:

in su

ch a

cond

ition a

s to b

e able

to

make

a su

bstan

tial c

ontrib

ution

. A

minim

um of

40 ye

ars i

s sug

geste

d.

Tree

s tha

t are

partic

ularly

good

ex

ample

s of th

eir sp

ecies

, esp

ecial

ly if

rare

or un

usua

l, or e

ssen

tial

comp

onen

ts of

grou

ps, o

r of fo

rmal

or

semi

-form

al Ar

boric

ultur

al fea

tures

for

exam

ple th

e dom

inant

and/o

r prin

cipal

trees

with

in an

aven

ue

Tree

s, gr

oups

or w

oodla

nds w

hich

prov

ide a

defin

ite sc

reen

ing or

softe

ning

effec

t to th

e loc

ality

in re

lation

to vi

ews

into o

r out

of the

site,

or th

ose o

f pa

rticula

r visu

al im

porta

nce f

or ex

ample

av

enue

s or o

ther a

rbor

icultu

ral fe

ature

s as

sess

ed as

grou

ps

Tree

s, gr

oups

or w

oodla

nds o

r sig

nifica

nt co

nser

vatio

n, his

torica

l, com

memo

rativ

e or

other

value

for e

xamp

le ve

teran

tree

s or

wood

-pas

ture

Light

Gree

n

Cate

gory

B

Thos

e of m

oder

ate qu

ality

and

value

: thos

e in s

uch a

cond

ition a

s to

make

a sig

nifica

nt co

ntribu

tion.

A mi

nimum

of 20

year

s is s

ugge

sted.

Tree

s tha

t migh

t be i

nclud

ed in

the

high c

atego

ry, bu

t are

down

grad

ed

beca

use o

f impa

ired c

ondit

ion.

Exam

ples i

nclud

e the

pres

ence

of

reme

diable

defec

ts inc

luding

un

symp

atheti

c pas

t man

agem

ent a

nd

mino

r sto

rm da

mage

Tree

s pre

sent

in nu

mber

s, us

ually

as

grou

ps or

woo

dland

s, so

they

form

dis

tinct

lands

cape

featu

res w

hich a

ttrac

t a h

igher

colle

ctive

ratin

g tha

n the

y migh

t as

indiv

iduals

. But

which

are n

ot,

indivi

duall

y, es

senti

al co

mpon

ents

of for

mal o

r sem

i-form

al ar

boric

ultur

al fea

tures

. For

exam

ple, tr

ees o

f mod

erate

qu

ality

withi

n an a

venu

e tha

t inclu

des

bette

r, A

categ

ory s

pecim

ens.

Or tr

ees

which

are i

ntern

al to

the si

te, th

erefo

re

indivi

duall

y hav

ing lit

tle vi

sual

impa

ct on

the

wide

r loca

lity

Tree

s with

clea

rly id

entifi

able

cons

erva

tion o

r othe

r cult

ural

bene

fits

Mid B

lue

Cate

gory

C

Thos

e tre

es of

low

quali

ty an

d valu

e: cu

rrentl

y in a

dequ

ate co

nditio

n to

rema

in un

til ne

w pla

nting

could

be

estab

lishe

d - a

mini

mum

of 10

ye

ars i

s sug

geste

d - or

youn

g tre

es

with

a stem

diam

eter b

elow

150 m

m

Tree

s not

quali

fying

in hi

gher

ca

tegor

ies

Tree

s pre

sent

in gr

oups

or w

oodla

nds,

but w

ithou

t this

confe

rring

on th

em

signif

icantl

y gre

ater la

ndsc

ape v

alue,

and/o

r tre

es of

fering

low

or on

ly tem

pora

ry sc

reen

ing be

nefit

Tree

s with

very

limite

d co

nser

vatio

n or o

ther c

ultur

al be

nefits

Grey

Note

– Whil

st C

categ

ory t

rees

will

usua

lly no

t be r

etaine

d whe

re th

ey w

ould

impo

se a

signif

icant

cons

traint

on

deve

lopme

nt, yo

ung t

rees

with

a ste

m dia

meter

of le

ss th

an 15

0mm

shou

ld be

cons

idere

d for

reloc

ation

Page 29: Preliminary Arboricultural Impact Assessment€¦ · Protected Species 2.3 Nesting birds are afforded statutory protection under the Wildlife & Countryside Act (1981) (as amended)

APPENDIX TWO:

TEMPORARY PROTECTIVE FENCING & GROUND PROTECTION SPECIFICATION

Page 30: Preliminary Arboricultural Impact Assessment€¦ · Protected Species 2.3 Nesting birds are afforded statutory protection under the Wildlife & Countryside Act (1981) (as amended)

Construcdetailed b1. be pr

Fenciapplic

2. be erthe du

3. preclu4. preclu

workspartie

5. precluadditi

Any incur

Tempora1. Temp

agreeplywo

2. The pbelow

3. The sno lesdiago

4. The twwith 3

5. The dangleshall

6. No fixdama

7. A 6001, ove

8. On coor deProte

Tempora1. Any n

overle2. The G

geotemater

3. Side-4. Prior

and m5. The T

only r

ction Exclbelow and trotected throing Construcable, as derected prior uration of thude any delude all cons and any oes; and ude the storves, cemenrsion into C

ary Protectporary proteement with ood boards.panels shalw.scaffold framss than 0.6

onal poles fiwo horizont3 no. clampdiagonal scae and extenbe driven nxing shall bage to tree r0mm x 300merleaf) shallompletion aelivery of pective Fenci

ary Groundnecessary Teaf).Ground Pro

extile membrial such asbutting scafto any dem

materials, thTemporaryremoved fol

- TEMPOGROUNusion Zon

to be agreedoughout theuction’ sectefined by ar

to any conhe project; livery of site

nstruction reother works

rage of all dnt and/or anEZs must b

tive Fencinective fencthe LPA, b

l butt toget

mework sha6 metres intxed to the utal rail poless to each joaffold pole sd back intoo less than

be made toroots when mm warningl be fixed to

and prior to plant and mng.

d ProtectionTemporary

otection Arbrane whichs woodchip. ffold boards

molition or che ArboriculGround Prllowing rece

ORARY PD PROTEnes (CEZsd with the Le developmtion below rea on the Tnstruction, d

e accommoelated activ

s to be carri

developmenny other delebe by prior a

g Construccing panelsbe either we

ther and be

all compriseto the grouuprights, ass shall be aoint.struts be cla

o the CEZ a0.5m into t

o any tree alocating pog sign read

o every 10.0any demolimaterials, t

nGround Pro

ea shall beh shall, in tu

s shall then constructiontural Consu

rotection sheipt of writte

Page 1 of 3

PROTECECTION), enclosed

Local Plannment proces

and detaileTree Protectdemolition o

dation and/vity, with thied out und

nt related meterious suarrangemen

ctions shall be eldmesh "H

e securely f

e of uprightund at maxis per 4 to 5 attached to t

amped to thand clampethe ground.and all possts. ing "TREE

0 metre lengition or conthe Consu

otection sha

e left undisurn, be cove

be fitted to works, site

ultant shall ihall remain en permissio

CTIVE FESPECIFI

d by Temping Authorit

ss, as specied in BS58tion Plan (Tor excavatio

/or materialshe sole excder supervis

materials andbstance. nt, following

of at leasHeras" pane

fixed to a s

poles of atmum 3.0 mbelow.the uprights

he top rail od to a 0.7 m

ssible preca

PROTECTgth of protecstruction wlting Arbor

all conform

sturbed andered by a c

cover the Ge preparatioinspect the in place unon from the

ENCING &ICATIONporary Proty (LPA), shfied in the 37:2005 Fi

TPP); on works an

s and/or plaception of ssion that ha

d substance

g consultatio

st 2.1 metrels or 18mm

scaffold fram

t least 3.0 mmetre centre

s at heights

of the scaffometre lengt

autions sha

ION AREA ctive fencinorks, site pist shall in

to Figure 3

d covered compressibl

Ground Proon, excavatiTemporary

ntil complet LPA.

&N - otective Fehall: ‘Temporaryg. 2 (overle

nd remain

ant machinespecified arave been ag

es including

on with the

res in heigm thick ext

mework, as

metres in lees with hor

s of 0.6 and

old framewoth of scaffo

all be taken

KEEP OUTg.

preparation, nspect the

3 of BS5837

by a semie layer con

otection Areion or deliv

y Ground Prtion of the

encing, as

y Protectiveeaf) and, if

in place for

ery; rboriculturalgreed by all

g fuels, oils,

LPA.

ght and, interior grade

s per 3 to 5

ngth drivenrizontal and

1.8 metres

ork at a 45ºld tube that

to prevent

T" (see Fig.

excavationTemporary

7:2005 (see

-permeablensisting of a

a. ery of plantrotection.project and

s

ef

r

ll

,

ne

5

nd

s

ºt

t

.

ny

e

ea

t

d

Page 31: Preliminary Arboricultural Impact Assessment€¦ · Protected Species 2.3 Nesting birds are afforded statutory protection under the Wildlife & Countryside Act (1981) (as amended)

F

12

345678

F

Fig. 1: CEZ W

1. Scaffold p2. Uprights d

appropriat3. Wooden p4. Weldmesh5. Scaffold c6. Wire twiste7. Ground le8. Scaffold p

Fig. 2: BS583

– CO

THE TPL

PRESE

THE FOLL� THE P� NO P

ZONE� NO M

EXCL� NO M� NO S� NO E� NO F

ANY INCWRITT

Warning Sign

poles. driven into grote. panels securedh "Heras" type

clamps. ed and securevel.

poles driven ap

37:2005 Temp

ONSTR

(TOWTREES EN

LANNING CERVATION

LE

LOWING MPROTECTI

PERSON SHE

MACHINE, PLUSION ZOMATERIALSSPOIL SHALEXCAVATIO

IRES SHAL

CURSION ITEN PERM

und at a maxi

d with wire tiese clamped to u

ed to inside fa

pproximately 0

orary Protectiv

RUCTIOKE

WN & COUNCLOSED B

CONDITIONORDER’, T

EAD TO CR

MUST BE OVE FENCIN

HALL ENTE

PLANT OR ONES SHALL BLL BE DEP

ON SHALL LL BE LIT I

INTO THE MISSION OF

Page 2 of 3

mum 3.0m sp

s or scaffold cuprights and h

ace of fencing.

0.6m into the g

ve Fencing –

ON EXCEEP OUNTRY PLANBY THIS FENS AND/ORTHE CONTRRIMINAL PR

OBSERVEDNG MUST NER THE CO

VEHICLES

BE STOREDPOSITED INOCCUR ININ THE EXC

EXCLUSIOF THE LOC

pacing with cro

clamps where orizontals.

ground.

Recommende

CLUSIOUT!NNING ACTENCE ARE R SUBJECTRAVENTIOROSECUTI

BY ALL PNOT BE MOONSTRUCT

S SHALL E

D IN THE EXN THE EXCN THE EXCLCLUSION Z

ON ZONE MCAL PLANN

oss members a

necessary.

ed Constructio

ON ZON

T 1990) PROTECTE

TS OF A ‘TRON OF WHIC

ON

ERSONNEOVEDTION EXCL

NTER THE

XCLUSIONLUSION ZOLUSION ZOZONE

MUST BE WNING AUTH

and brace as

on

NE –

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Page 32: Preliminary Arboricultural Impact Assessment€¦ · Protected Species 2.3 Nesting birds are afforded statutory protection under the Wildlife & Countryside Act (1981) (as amended)

Fig. 3: BS55837:2005 Temporary Grou

Page 3 of 3

und Protectionn – Recommennded Construcction

Page 33: Preliminary Arboricultural Impact Assessment€¦ · Protected Species 2.3 Nesting birds are afforded statutory protection under the Wildlife & Countryside Act (1981) (as amended)
Page 34: Preliminary Arboricultural Impact Assessment€¦ · Protected Species 2.3 Nesting birds are afforded statutory protection under the Wildlife & Countryside Act (1981) (as amended)
Page 35: Preliminary Arboricultural Impact Assessment€¦ · Protected Species 2.3 Nesting birds are afforded statutory protection under the Wildlife & Countryside Act (1981) (as amended)
Page 36: Preliminary Arboricultural Impact Assessment€¦ · Protected Species 2.3 Nesting birds are afforded statutory protection under the Wildlife & Countryside Act (1981) (as amended)

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