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BS5837:2012
Trees in relation to design, demolition and construction –
Recommendations
Tree Survey
Bancroft Gardens,
Bancroft,
Hertfordshire.
9 January 2014
Author: Jon Hartley Dip.Hort. (Arb.), Tech.Arbor.A.
Arbtech Consulting Ltd 5678552 GB903660148 Directors: R. M. Oates Unit 3 Well House Barn, Chester Road, Chester, CH4 0DH Also in Bedfordshire, Birmingham, Kent, Manchester, Lancashire, London, Surrey and Sussex Tel. 01244 661170 Web. www.arbtech.co.uk E-mail. email@arbtech.co.uk Bancroft Gardens – Arbtech TSR 01
Marion Clarke Building Design Partnership Ltd.
Bancroft Park, Bancroft, Hitchin, Hertfordshire
09/01/14
Tree Survey Report Bancroft Park, Bancroft, Hitchin, Hertfordshire
Marion Croft of BDP Ltd recently appointed Arbtech Consulting Ltd. to undertake a
BS5837 Tree Survey and Tree Constraints Plan at the above address
I am Jon Hartley, an Arboricultural Surveyor for Arbtech Consulting Ltd. I undertook
the tree survey on 3rd January 2014 and have subsequently produced this summary
of my findings.
I hold an Australian Qualifications Framework (AQF) level 5 Diploma in arboriculture
which the UK NARIC consider comparable to a BTEC HNC. UK NARIC is the
National Agency responsible for providing information, advice and expert opinion on
qualifications worldwide. I have professional experience in contracting and in
Arboricultural Consultancy spanning fifteen years.
The advice below and appended is underwritten by our Professional Indemnity
Insurance for the business practice of Arboricultural Consultancy in the sum of one
million Pounds Sterling in each and every claim.
Tree Survey Executive Summary
A total of 51trees individual trees and 14 groups of trees were surveyed.
During the survey I categorised the group of trees using “Table 1 – Cascade chart for
tree quality assessment” of the BS5837:2012.
The proposed development for the site is unknown to the tree surveyor.
Of the trees and groups surveyed 48 were classified as C grade trees. The vast
majority of these C trees were classified thus due to advance maturity and
subsequent structural issues which make them poor candidates for retention on a
site being developed.
3 trees were found to be in such a condition that a classification of U was assigned.
These 3 were all individual trees with significant structural issues which should be
considered for management in the short term.
Arbtech Consulting Ltd 5678552 GB903660148 Directors: R. M. Oates Unit 3 Well House Barn, Chester Road, Chester, CH4 0DH Also in Bedfordshire, Birmingham, Kent, Manchester, Lancashire, London, Surrey and Sussex Tel. 01244 661170 Web. www.arbtech.co.uk E-mail. email@arbtech.co.uk Bancroft Gardens – Arbtech TSR 01
18 B grade trees were identified as being of significant quality and future potential
that they may prove an asset to any development of the site.
There are 2 trees on site which really stood out. Tree 35 a massive lime near the
centre of the site which has an impressive stature and is in excellent health and Tree
71 which while relatively young, is in excellent condition and has huge potential for
the future.
Individual notes on each tree’s structural and physiological condition are found in the
Notes section of the survey schedule.
This content is for educational and informative purposes; so parts of it are reproduced with the kind permission of BSI Global.
Arbtech Consulting Ltd 5678552 GB903660148 Directors: R. M. Oates Unit 3 Well House Barn, Chester Road, Chester, CH4 0DH Also in Bedfordshire, Birmingham, Kent, Manchester, Lancashire, London, Surrey and Sussex Tel. 01244 661170 Web. www.arbtech.co.uk E-mail. email@arbtech.co.uk Bancroft Gardens – Arbtech TSR 01
BS5837 Scope
This standard recognizes that there can be problems of development close to
existing trees which are to be retained, and of planting trees close to existing
structures. This standard sets out to assist those concerned with trees in relation to
construction to form balanced judgements. It does not set out to put arguments for or
against development, or for the removal or retention of trees. Where development,
including demolition, is to occur, the standard provides guidance on how to decide
which trees are appropriate for retention, on the means of protecting these trees
during development, including demolition and construction work, and on the means
of incorporating trees into the developed landscape.
Definitions
Arboriculturist
An arboriculturist (or arboricultural consultant) is a person who has, through relevant
education, training and experience, gained recognized qualifications and expertise in
the field of trees in relation to construction.
Tree Survey
A tree survey should be undertaken by an arboriculturist and should record
information about the trees on a site independently of and prior to any specific
design for development. As a subsequent task, and with reference to a design or
potential design, the results of the survey should be included in the preparation of a
tree constraints plan, which should be used to assist with site layout design.
Tree Constraints Plan
A TCP is plan, typically delivered as an AutoCAD drawing (.dwg file format),
prepared by an arboriculturist for the purposes of layout design showing the root
protection area and representing the effect that the mature height and spread of
retained trees will have on layouts through shade, dominance, etc.
Root Protection Area
An RPA is a layout design tool indicating the area surrounding a tree that contains
sufficient rooting volume to ensure the survival of the tree, shown in plan form in m².
Construction Exclusion Zone (also termed Tree Protection Zone)
A construction exclusion or tree protection zone is an area based on the RPA (in m²),
identified by an arboriculturist, to be protected during development, including
demolition and construction work, by the use of barriers and/or ground protection fit
for purpose to ensure the successful long-term retention of a tree.
Arbtech Consulting Ltd 5678552 GB903660148 Directors: R. M. Oates Unit 3 Well House Barn, Chester Road, Chester, CH4 0DH Also in Bedfordshire, Birmingham, Kent, Manchester, Lancashire, London, Surrey and Sussex Tel. 01244 661170 Web. www.arbtech.co.uk E-mail. email@arbtech.co.uk Bancroft Gardens – Arbtech TSR 01
Arboricultural Impact Assessment
This is a study, undertaken by an arboriculturist, to identify, evaluate and possibly
mitigate the extent of direct and indirect impacts on existing trees that may arise as a
result of the implementation of any site layout proposal.
Tree Protection Plan
A TPP is plan, typically delivered as an AutoCAD drawing (.dwg file format),
prepared by an arboriculturist showing the finalized layout proposals, tree retention
and tree and landscape protection measures detailed within the arboricultural
method statement, which can be shown graphically.
Arboricultural Method Statement
This is a methodology for the implementation of any aspect of development that has
the potential to result in loss of or damage to a tree. The AMS is likely to include
details of an on-site tree protection monitoring regime.
Methodology
The methodology used to assess the trees was the British Standard BS5837:2012-
Trees in relation to design, demolition and construction tree survey method. The aim
of the survey is to establish which trees are moderate and good quality; suitable for
retention and justifying protection. And, which trees are low or poor quality; either
undesirable or unsuitable to retain and protect.
The tree survey includes all trees included in the land survey red line boundary plan,
as well as any that may have been missed, and it should categorize trees or groups
of trees, including woodlands for their quality and value within the existing context, in
a transparent, understandable and systematic way. Where the arboriculturist has
deemed it appropriate, the trees have been tagged with small metal or plastic tags,
placed as high as is convenient on the stem of each tree.
Whilst master plan proposals for the development of the site might be available, the
trees have been surveyed without taking these into consideration. All detailed design
work on site layout should take into consideration the results of the tree survey (and
the TCP).
Trees forming groups and areas of woodland (including orchards, wood pasture and
historic parkland) are identified and considered as groups where the arboriculturist
has determined that this is appropriate, particularly where they contain a variety of
species and age classes that could aid long-term management. It is often expedient
to assess the quality and value of such groups of trees as a whole, rather than as
individuals. However, an assessment of individuals within any group has been
undertaken if they are open-grown or if there is a need to differentiate between them.
Arbtech Consulting Ltd 5678552 GB903660148 Directors: R. M. Oates Unit 3 Well House Barn, Chester Road, Chester, CH4 0DH Also in Bedfordshire, Birmingham, Kent, Manchester, Lancashire, London, Surrey and Sussex Tel. 01244 661170 Web. www.arbtech.co.uk E-mail. email@arbtech.co.uk Bancroft Gardens – Arbtech TSR 01
The quality and value of each tree or group of trees has been recorded by allocating
it to one of the four categories; A, B, C, or U (highest to lowest quality respectively).
The categories are differentiated on the tree survey plan by colour, or by suffixing the
category adjacent to the tree identification number on the TCP.
The survey schedule lists all the trees or groups of trees. The following information is
also provided:
I. reference number (to be recorded on the tree survey plan);
II. species (common or scientific names);
III. height in metres;
IV. stem diameter in millimetres at 1.5 m above adjacent ground level or
immediately above the root flare for multi-stemmed trees;
V. branch spread in metres taken at the four cardinal compass points;
VI. height in metres of crown clearance above adjacent ground level;
VII. age class (young, middle aged, mature, over-mature, veteran);
VIII. physiological condition (e.g. good, fair, poor, dead);
IX. structural condition, e.g. collapsing, the presence of any decay and physical
defect;
X. preliminary management recommendations, including further investigation of
suspected defects that require more detailed assessment and potential for
wildlife habitat; and
XI. Category grading to be recorded in plan on the tree survey plan.
Recommendations
With the benefit of making an assessment of your planning proposals, we make the
following recommendation to ensure that no conditions relating to arboriculture are
attached to any planning consent secured; obtain an arboricultural report to include:
a) An arboricultural impact assessment (AIA);
b) An arboricultural method statement (AMS); and
c) A tree protection plan drawing (TPP).
Arbtech Consulting Ltd 5678552 GB903660148 Directors: R. M. Oates Unit 3 Well House Barn, Chester Road, Chester, CH4 0DH Also in Bedfordshire, Birmingham, Kent, Manchester, Lancashire, London, Surrey and Sussex Tel. 01244 661170 Web. www.arbtech.co.uk E-mail. email@arbtech.co.uk Bancroft Gardens – Arbtech TSR 01
Limitations
Trees were inspected using visual observation from ground level only. Trees were
not climbed or inspected below ground level. Inaccessible trees will have best
estimates made about the location, physical dimensions and characteristics. Trees
have been grouped where BS5837 guides us that it is expedient to do so. Trees
have been excluded from the survey if they are found by us to be sufficiently far
away from the proposed developable area or if they are outside of the red line
boundary plan showing the expectations of our Client for the extent of the survey.
BS5837 does not draw any distinction between trees subject to statutory protection,
such as a Tree Preservation Order (“TPO”), and those trees without. This is
principally because a detailed planning consent overrides any TPO protection.
Consequently, we do not seek to offer any comparison between or infer any
difference in the quality or importance of TPO trees and other trees.
Appendices
The following documents were released to the Client as appendices to this report:
Survey Schedule (PDF)
Tree Constraints Plan drawing (PDF)
If you require clarification of information contained herein, please do not hesitate to
contact us via 08450 176950.
Yours Sincerely,
Jon Hartley
Arboricultural Surveyor
Arbtech Consulting Ltd 5678552 GB903660148 Directors: R. M. Oates Unit 3 Well House Barn, Chester Road, Chester, CH4 0DH Also in Bedfordshire, Birmingham, Kent, Manchester, Lancashire, London, Surrey and Sussex Tel. 01244 661170 Web. www.arbtech.co.uk E-mail. email@arbtech.co.uk
Appendix 1: Tree Survey Schedule
Arbtech Consulting Ltd 5678552 GB903660148 Directors: R. M. Oates Unit 3 Well House Barn, Chester Road, Chester, CH4 0DH Also in Bedfordshire, Birmingham, Kent, Manchester, Lancashire, London, Surrey and Sussex Tel. 01244 661170 Web. www.arbtech.co.uk E-mail. email@arbtech.co.uk Bancroft Park – Arbtech TS 01 A
Tree Survey Schedule Bancroft Park, Bancroft, Hitchin, Hertfordshire
Client: Marion Clarke
Survey Date 3rd
January 2014
Weather Conditions Stormy showers
Surveyor Jon Hartley
Key:
Tree Number A unique number or reference to identify trees or groups as shown on associated plans. The suffix G denotes a Group.
Species Common and or taxonomic names.
Height The height of the tree in meters (m).
Trunk Diameter The stem diameter in millimetres (mm) taken at 1.5m above ground level unless otherwise specified. The suffix # denotes an estimated
measurement where access has been restricted.
Canopy Spread The extent of the canopy taken in meters (m) to the principle points of the compass, North (N), East (E), South (S) and West (W). The suffix #
denotes an estimated measurement where access has been restricted.
Crown Clearance The height of canopy clearance above ground level to the lowest point of the canopy, taken in meters (m).
Age Class Age classification; Young (Y), Middle Aged (MA), Mature (M), Late Mature (LM), Veteran (V).
Physiological Condition The general physiological condition of the tree; Average, Below average, Low, Dead.
Structural Condition The general structural condition of the tree; Good, Moderate, Indifferent, Poor, Hazardous.
Comments Notes and general comments on the structural condition of the tree, its environment and it estimated remaining contribution.
Category The retention category referring to the quality and useful contribution in years; U = <10yrs; A = >40yrs; B = >20yrs; C = >10yrs.
The retention sub category referring to the type of amenity; 1 = Arboricultural; 2 = Landscape; 3 = Cultural including conservation.
Arbtech Consulting Ltd 5678552 GB903660148 Directors: R. M. Oates Unit 3 Well House Barn, Chester Road, Chester, CH4 0DH Also in Bedfordshire, Birmingham, Kent, Manchester, Lancashire, London, Surrey and Sussex Tel. 01244 661170 Web. www.arbtech.co.uk E-mail. email@arbtech.co.uk Bancroft Park – Arbtech TS 01 A
Tree No.
Species Height
(M)
Trunk Diameter
(MM)
Canopy Spread (M)
Crown Clearance
(M)
Age Class
Physiological Condition
Structural Condition
Comments Category
G1 Various 5m 2m
300mm- 100mm
Up to 1m 2m Y Below average Poor
Species include: 29x lime and 16x holly have all been topped at 5m and 2m respectively. Of low quality and value.
C2,3
G2 Various 13m 80mm-120mm
Up to 2m 0.5m Y Average Poor Species include: False acacia, May & Elder; all individuals historically topped at 1m. Of low quality and value.
C2,3
3 Lawson cypress
10m 230mm
N 1.5m E 1.5m S 1.5m W 1.5m
1m Ma Average Moderate
The original main stem is missing. The current leader is an adapted secondary limb which has become dominant from near the base. There is an elbow at the base where the branch has turned upwards. Of fair quality but low value.
C1
4 Common lime 8m 500mm
@1m
N 1.5m E 2m S 2m W 2m
2m MA Average Moderate Historically topped at 4m. Of low quality and value.
C1
5 Common lime 8m 230mm
N 3m E 3m S 3m W 3m
2m Y Average Good
All unions are well constructed with no included bark. The lowest branch of the first limb has ripped free. The 300mm wound is 60% occluded. Of good quality and fair future value.
B2
6 Common lime 10m 380mm
N 3m E 4m S 5m
W 3.5m
3.5m MA Average Good No significant defects noted. B2
7 Lawson cypress
10m 260m
N 3m E 1m S 1m W 2m
3m Y Average Medium Split limb at 5m on northern aspect. Supressed by trees to the east. Of fair quality and low future value.
C1
Arbtech Consulting Ltd 5678552 GB903660148 Directors: R. M. Oates Unit 3 Well House Barn, Chester Road, Chester, CH4 0DH Also in Bedfordshire, Birmingham, Kent, Manchester, Lancashire, London, Surrey and Sussex Tel. 01244 661170 Web. www.arbtech.co.uk E-mail. email@arbtech.co.uk Bancroft Park – Arbtech TS 01 A
Tree No.
Species Height
(M)
Trunk Diameter
(MM)
Canopy Spread (M)
Crown Clearance
(M)
Age Class
Physiological Condition
Structural Condition
Comments Category
G8 Various 14m 120mm- 950mm
Up to 5m 2m M Low Poor
Multiple significant defects which if remediated would negatively affect remaining trees. Although this is a generally mature stand of tree there are a multitude of defects noted in each individual. Of low quality and future value.
C1
9 Scotts pine 16m 540mm
N 4m E 2m S 5m W 5m
2m M Average Good significant defects noted.
B1
10 Maiden hair
tree 8m 400mm
N 2.5m E 3m S 3m W 2m
3m OM Low Poor
Twin stemmed with included bark at the main union. Basal growth present. Significant decay in the northern stem. Ganoderma bracket present.
U
11 Sycamore 16m 480mm
N 4.5m E 3m S 4m
W 4.5m
4.2m MA Average Moderate Bifurcates at 4m with included present. Squirrel damage evident on upside of low limbs.
B1
12 Sweet
chestnut 11m 530mm
N 2.5m E 5m S 6m
W 4.5m
3m MA Average Moderate No significant defect noted. B3
G13 Lawson cypress
10m 400mm-600mm
Up to 2m 0m MA Average Indifferent No significant defects noted. Although the trees are in good general condition they are of low value.
C1
14 Sweet
chestnut 11m 390mm
N 2.5m E 5m
S 4.5m W 4m
4m MA Average Good Crown break at 4.5m. Multi-stemmed from this point.
B3
Arbtech Consulting Ltd 5678552 GB903660148 Directors: R. M. Oates Unit 3 Well House Barn, Chester Road, Chester, CH4 0DH Also in Bedfordshire, Birmingham, Kent, Manchester, Lancashire, London, Surrey and Sussex Tel. 01244 661170 Web. www.arbtech.co.uk E-mail. email@arbtech.co.uk Bancroft Park – Arbtech TS 01 A
Tree No.
Species Height
(M)
Trunk Diameter
(MM)
Canopy Spread (M)
Crown Clearance
(M)
Age Class
Physiological Condition
Structural Condition
Comments Category
G15 Various 7m 120mm- 400mm
Up to 4m
1m MA Below average Indifferent
All trees infested with ivy from base to 70%. Base, stems and unions are not visible for inspection. Of low quality and future value.
C1
16 Ash 16m #750mm
N 8m E 7m S 9m W 9m
5m M Average Obscured
by ivy
Tree infested with ivy from base to 70%. Base, stems and unions are not visible for inspection. Tip extension appears good.
B1
17 Horse
chestnut 14m 550mm
N 6.5m E 5m S 6m W 6m
3m MA Average Moderate Multi-stemmed from 4m. Multiple unions of compressive nature.
B1
G18 Yew 12m 150mm- 500mm
N 6.5m E 4.5m S 5m
W 7.5m
2.5m M Average Good
Two trees. Truncated limbs to the east. Ivy from base to 50%. Base, stems and unions are not entirely visible for inspection.
B1
19 Birch 6m 240mm
N 3.5m E 2.5m S 3.5m W 3.5m
3m MA Average Moderate Supressed by G18 to the east. Of fair quality but future value.
C1
G20 Various 17m 300mm- 1000mm
Up to 7.5m
3m M Average Poor
Species include: Beech & Field maple. Major structural faults in the dominant beech of the group. Ivy is covering the base, stems and major unions impairing detailed inspection of other individuals. Of low quality and future value.
C2,3
Arbtech Consulting Ltd 5678552 GB903660148 Directors: R. M. Oates Unit 3 Well House Barn, Chester Road, Chester, CH4 0DH Also in Bedfordshire, Birmingham, Kent, Manchester, Lancashire, London, Surrey and Sussex Tel. 01244 661170 Web. www.arbtech.co.uk E-mail. email@arbtech.co.uk Bancroft Park – Arbtech TS 01 A
Tree No.
Species Height
(M)
Trunk Diameter
(MM)
Canopy Spread (M)
Crown Clearance
(M)
Age Class
Physiological Condition
Structural Condition
Comments Category
21 Ash 7m 216mm
N 4m E 4m S 4m W 4m
1m Y Average Moderate
3 stems from base, unions constructed well with no included bark. Currently in good condition but is a young, insignificant tree with poor structural form.
C1
G22 Various 16m 400mm- 790mm
Up to 4.5m
2m M Average Moderate
Species include: Field maple & Beech. Base, stems and unions are obscured by ivy. The shape of the unions suggests that they are likely to be well constructed.
B2
G23 Various 6m-12m
450mm-700mm
See plan for
canopy of group
2m OM Average Ivy Base, stems and unions are obscured by ivy to 80%. Of low quality and future aesthetic value.
C1
24 Ash 12m 600mm
N 5m E 7m S 6m W 7m
3.5m M Average Moderate Base, stems and unions are obscured by ivy to 90%. Growing in and supporting the river bank.
B2
25 Hazel 6.5m 6x120mm
N 3m E 3m S 1m W 2m
2m Y Average Moderate Growing in and supporting the river bank.
C1
26 Pear 7m 480mm
N 5m E 6m S 6m
W 1.5m
4m OM Low Poor Extensive decay detectable with the hammer to crown break.
U
G27 Flowering
cherry 6m
580mm-490mm
Up to 4m 2m OM Below average Poor Two trees. Poor unions with included bark, decay and Ganoderma present a the graft point at 3m
U
Arbtech Consulting Ltd 5678552 GB903660148 Directors: R. M. Oates Unit 3 Well House Barn, Chester Road, Chester, CH4 0DH Also in Bedfordshire, Birmingham, Kent, Manchester, Lancashire, London, Surrey and Sussex Tel. 01244 661170 Web. www.arbtech.co.uk E-mail. email@arbtech.co.uk Bancroft Park – Arbtech TS 01 A
Tree No.
Species Height
(M)
Trunk Diameter
(MM)
Canopy Spread (M)
Crown Clearance
(M)
Age Class
Physiological Condition
Structural Condition
Comments Category
28 Foxglove tree 10m 280mm
N 4m E 4m S 4m W 4m
2m MA Average Moderate Mechanical wound at base. There is a swelling at the base to approximately double the stem diameter.
B1
29 Silver birch 15m 300mm
N 3.5m E 3.5m S 3.5m W 3.5m
2m MA Average Good No visible defects noted B1
30 Crab apple 7m 270mm
N 3m E 3m S 3m W 3m
2m M Average Indifferent
Repeated strimmer damage at base has resulted in poor development. No significant defects noted. Of low quality and future value.
C1
31 Norway maple 9m 420mm
N 4m E 4m S 4m W 6m
4m MA Average Moderate Minor wound on low northern limb. Some tight unions, no significant included bark at this time.
B1
32 Incense cedar 7m #180mm
N 1.5m E 1.5m S 1.5m W 1.5m
0m MA Average Low
no close companion trees. Of low quality and future value.
C1
33 Hawthorn 4m 250mm @1m
N 2.5m E 2.5m S 2.5m W 2.5m
1.5m M Average Moderate Previously topped at 3m. Of low quality and future value.
C1
G34 Various 2m-5m 120mm-300mm
Up to 3m 0m M Average Moderate A shrub bed with little value. C1
Arbtech Consulting Ltd 5678552 GB903660148 Directors: R. M. Oates Unit 3 Well House Barn, Chester Road, Chester, CH4 0DH Also in Bedfordshire, Birmingham, Kent, Manchester, Lancashire, London, Surrey and Sussex Tel. 01244 661170 Web. www.arbtech.co.uk E-mail. email@arbtech.co.uk Bancroft Park – Arbtech TS 01 A
Tree No.
Species Height
(M)
Trunk Diameter
(MM)
Canopy Spread (M)
Crown Clearance
(M)
Age Class
Physiological Condition
Structural Condition
Comments Category
35 Common lime 20m 850mm
N 9m E 8m S 7m W 5m
7m M Average Good
Crown structure is good with generally well-constructed unions and very little epicormic growth for the species. There is deadwood in excess of 50mm throughout the crown with 2 branches currently detached and hanging.
A1
36 Flowering
cherry 4m 180mm
N 0.5m E 2m S 2m W 2m
2m MA Below average Moderate Of low quality and value. C1
37 Horse
chestnut 9m 530mm
N 4.5m E 6m S 7m W 6m
2m M Below average Low
Bark legions throughout the lower stem and primary scaffold. Poor pruning wounds on stem all with decay associated. Of low quality and value.
C1
38 Cider gum 16m 470mm
N 5m E 4m S 5m W 4m
4m MA Average Good
Tree growing well with immediately significant defects noted. Of good quality and reasonable aesthetic value. Ivy covers lower 2m of stem.
B1
G39 Lawson cypress
7m-10m
#120mm-#300mm
Up to #2m
0m MA Average Moderate A hedge planted to screen the tennis courts. It has not been managed since planting. Of low quality and value.
C2
40 Flowering
cherry 4m 240mm
N 2m E 2m S 3m W 3m
2m MA Below average Low Decay present at the top of the stem at the graft. Of low quality and value.
C1
Arbtech Consulting Ltd 5678552 GB903660148 Directors: R. M. Oates Unit 3 Well House Barn, Chester Road, Chester, CH4 0DH Also in Bedfordshire, Birmingham, Kent, Manchester, Lancashire, London, Surrey and Sussex Tel. 01244 661170 Web. www.arbtech.co.uk E-mail. email@arbtech.co.uk Bancroft Park – Arbtech TS 01 A
Tree No.
Species Height
(M)
Trunk Diameter
(MM)
Canopy Spread (M)
Crown Clearance
(M)
Age Class
Physiological Condition
Structural Condition
Comments Category
41 Horse
chestnut 10m 390mm
N 5m E 5m S 6m W 6m
2m MA Below average Moderate
Poor tip extension and bud density. Target canker at 3m on the northern side of the stem. Multiple pruning wounds on the stem with associated decay. Of low quality and value.
C1
42 Flowering
cherry 10m 270mm
N 1m E 4m S 4m W 4m
3m MA Average Moderate Congested stem union at 3m with included bark present. Of low quality and value.
C1
43 Norway maple 11m 580mm
N 4m E 4m S 5m
W 3.5m
3m M Average Indifferent
Historically topped at approximately 5m and recently reduced to leave wounds of 50mm-100mm. Of medium quality.
C1
44 Thuja 12m 460mm
N 3m E 5m S 4m W 5m
0m MA Average Good Suppressed by 45. Of fair quality and low value.
C1
45 Honey locust 16m 870mm
N 9m E 6m S 5m W 7m
5m OM Below average Poor Deep stem fluting typical of species. All stem unions compressive in nature. Of low quality and value at his age.
C1
46 Thuja 9m 510mm
N 3m E 3m S 4m W 3m
0m MA Average Good
Low limbs regularly trimmed to manage footpath over hang. This has resulted in an individual of low quality and value.
C1
47 Honey locust 14m 800mm
N 4m E 6m S 6m W 7m
4m OM Low poor
Stem unions of compressive nature with a rose growing from one major union. Recent major dead wood removed.
C1
Arbtech Consulting Ltd 5678552 GB903660148 Directors: R. M. Oates Unit 3 Well House Barn, Chester Road, Chester, CH4 0DH Also in Bedfordshire, Birmingham, Kent, Manchester, Lancashire, London, Surrey and Sussex Tel. 01244 661170 Web. www.arbtech.co.uk E-mail. email@arbtech.co.uk Bancroft Park – Arbtech TS 01 A
Tree No.
Species Height
(M)
Trunk Diameter
(MM)
Canopy Spread (M)
Crown Clearance
(M)
Age Class
Physiological Condition
Structural Condition
Comments Category
48 Broadleaved
lime 22m 1430mm
N 11m E 10m S 8m W 9m
4m M average Moderate
5 co-dominant stems converge at approximately 5m. There is included bark at the unions but no reactive growth to suggest that these are particularly weak. Management may be required depending on target occupation. There is deadwood in excess of 50mm throughout the crown. Tree of good quality and high aesthetic value.
B1
49 Honey locust 16m 1000mm
N 7m E 7m S 5m W 7m
6m OM Low Hazardous
Un-identifiable fungal fruiting body at 1.5m on northern and southern side of main stem. Cavity at 2m on North. Of low quality and at this age, low long term value.
C1
50 Honey locust 5m 830mm
N 7m E 4m
S 4.5m W 4m
4m OM Below average Moderate Hollow buttress on northern side. Of low quality and at this age, low long term value.
C1
51 Black
mulberry 8m 410mm
N 2m E 4m S 6m W 3m
3m OM Below average Poor
Stem union has included bark and several decaying pruning wounds in close proximity. Of low quality and long-term value
C1
52 Honey locust 16m 910mm
N 5m E 6m S 8m W 7m
4m OM Low Indifferent Die back is present throughout the crown. Of low quality and at this age, low long term value.
C1
53 Honey locust 9m 940mm
N 2m E 3.5 S 3m
W 1.5m
4m OM Low Poor
Fungal fruiting body at 3m on the R “ ” Of low quality and at this age, low long term value.
C1
Arbtech Consulting Ltd 5678552 GB903660148 Directors: R. M. Oates Unit 3 Well House Barn, Chester Road, Chester, CH4 0DH Also in Bedfordshire, Birmingham, Kent, Manchester, Lancashire, London, Surrey and Sussex Tel. 01244 661170 Web. www.arbtech.co.uk E-mail. email@arbtech.co.uk Bancroft Park – Arbtech TS 01 A
Tree No.
Species Height
(M)
Trunk Diameter
(MM)
Canopy Spread (M)
Crown Clearance
(M)
Age Class
Physiological Condition
Structural Condition
Comments Category
54 Honey locust 10m 870mm
N 5m E 7m S 6m W 3m
5m OM Low Poor
Previously partially wind thrown to the east. Major deadwood (>50mm) in the crown. Of low quality and at this age, low long term value.
C1
55 Honey locust 12m 970mm
N 3m E 5m S 7m W 4m
6m OM Low Poor
Recently reduced leaving 80mm-120mm pruning wounds. Fungal fruiting body at 2m on the northern side of the stem. Holly growing from stem union. Of low quality value.
C1
56 Norway maple 12m 620mm
N 6m E 5m S 5m
W 5.5m
3m M Average Medium Historically topped at 4m. Of fair quality and some aesthetic value as a mature tree bordering the road.
C1
57 Plum 7m #380mm
N 2m E 4m S 4m W 2m
2m M Below average Low
There is ivy obscuring the tree from the base to 60% coverage. Broken limbs are hanging in the crow and there is dead wood present. Of low quality and value.
C1
58 Plum 7m #400mm
N 3m E 3m S 3m W 4m
2m M Below average Low
There is ivy obscuring the tree from the base to 60% coverage. Broken limbs are hanging in the crow and there is dead wood present. Of low quality and value.
C1
59 Hawthorn 6m 290mm
N 3m E 3m S 3m W 3m
2m M Average Good
Basal growth is developing suggesting some stress in the tree. Currently of good quality and good value for wildlife.
B1
60 Incense cedar 6m 180mm
N 2.5m E 2.5m S 2.5m W 2.5m
0m Y Average Good Of good quality for the species but low overall value.
C1
Arbtech Consulting Ltd 5678552 GB903660148 Directors: R. M. Oates Unit 3 Well House Barn, Chester Road, Chester, CH4 0DH Also in Bedfordshire, Birmingham, Kent, Manchester, Lancashire, London, Surrey and Sussex Tel. 01244 661170 Web. www.arbtech.co.uk E-mail. email@arbtech.co.uk Bancroft Park – Arbtech TS 01 A
Tree No.
Species Height
(M)
Trunk Diameter
(MM)
Canopy Spread (M)
Crown Clearance
(M)
Age Class
Physiological Condition
Structural Condition
Comments Category
61 Atlantic cedar 9m 440mm
N 6m E 5.5m S 4m W 6m
0.4m MA Average Good Of good quality and high potential for amenity value.
B1
62 Gold leylandii 7m 260mm
N 2m E 2m S 2m W 2m
0m Y Average Good Of good quality but low long term value.
C1
63 Horse
chestnut 14m 850mm
N 2m E 7m S 5m W 7m
4m OM Low Poor
M g “ g” Coalescing columns of dysfunctional wood are likely. Of low quality and low long term value.
C1
64 May tree 5m 120mm
N 1m E 3m S 1m W 2m
1.5m M Average Good Asymmetrical crown as a result of suppression by 63. Fair quality with low long term value.
C1
65 Purple plum 8m #400mm
N 5m E 5m S 5m W 2m
2m OM Low Poor
Ivy obscures the base, stem and branch unions. Die back throughout crown. Of low quality and, at this age, low long term value.
C1
66 Weeping
beech 8m 330mm
N 6m E 5m
S 4.5m W 4m
0m MA Average Good
Regular works have been requited to manage the impact to road users. Of medium quality but low long term value.
C1
G67 Various 7m 120mm-210mm
Up to 3m 0m Y Average Moderate
Individuals which have been planted without the room to reach maturity. No particular defects are noted at this time. Of medium quality at present but low long term value.
C1
Arbtech Consulting Ltd 5678552 GB903660148 Directors: R. M. Oates Unit 3 Well House Barn, Chester Road, Chester, CH4 0DH Also in Bedfordshire, Birmingham, Kent, Manchester, Lancashire, London, Surrey and Sussex Tel. 01244 661170 Web. www.arbtech.co.uk E-mail. email@arbtech.co.uk Bancroft Park – Arbtech TS 01 A
Tree No.
Species Height
(M)
Trunk Diameter
(MM)
Canopy Spread (M)
Crown Clearance
(M)
Age Class
Physiological Condition
Structural Condition
Comments Category
G68 Various 7m #400mm Up to 4m 0m M Below average Moderate
Individuals which have been planted without the room to reach maturity. No particular defects are noted at this time. Of medium quality at present but low long term value.
C1
69 Purple plum 8m #400mm
N 4m E 4m S 4m W 5m
2m M Average Moderate
Ivy obscures the base, stem and branch unions. Die back throughout crown. Of low quality and, at this age, low long term value.
C1
70 Golden
incense cedar 7m 230mm
N 3m E 3m S 3m W 3m
0m MA Average Moderate Of good quality but low long term value.
C1
71 Giant sequoia 13m 780mm
N 3.5m E 3.5m S 3.5m W 3.5m
0m MA average Good
There are dead, low branches on the eastern side consistent with fire damage. Of good general quality and high potential for amenity value.
A1
Arbtech Consulting Ltd 5678552 GB903660148 Directors: R. M. Oates Unit 3 Well House Barn, Chester Road, Chester, CH4 0DH Also in Bedfordshire, Birmingham, Kent, Manchester, Lancashire, London, Surrey and Sussex Tel. 01244 661170 Web. www.arbtech.co.uk E-mail. email@arbtech.co.uk
Appendix 2: Tree Constraints Plan
LP
LP
LP
PT
MH
LP
LP
LP
LP
LP
SP
BIN
PT
MH
PT
IC
MH
PT
MH
BENCH
PT
PT
PT
PT
PT
DR
DR
DR
DR
DR
DR
IC
IC
IC
IC
BIN
IC
LP
BIN
BENCH
BIN
PT
PT
PT
PT
BENCH
NP
BENCH
BENCH
BIN
BENCH
PT
PT
IC
BOL
BOL
BOL
DR
DR
IC
IC
IC
DR
DR
IC
PT
PT
PT
PT
BOL
DR
DR
DR
PT
PT
PT
PT
PT
DR
DR
DR
DR
BIN
LP
PT
LP
IC
NP
WST
LP
DR
DR
RE
IC
PT
PT
BENCH
BENCH
BENCH
BENCH
BENCH
BENCHBENCH
PT
PT
FP
SP
BENCH
SP
BENCH
BENCH
BENCH
RE
RE
RE
LP
BENCH
RE
RE
PT
PT
BENCH
BENCH
BENCH
RE
RE
BENCH
IC
RE
RE
DR
DR
CB
IC
IC
DR
BOL
BOL
BOL
BOL
BOL
DR
DR
DR
DR
PT
PT
PT
PT
PT
PT
PT
PT
NP
BIN
BENCH
IC
BENCH
BIN
BENCH
BENCH
BENCH
BIN
DR
DR
DR
BIN
BIN
BIN
PT
IC
BENCH
BIN
BENCH
BIN
BENCH
BIN
BENCH
BIN
BIN
BENCH
BENCH
NP
BIN
BS
IC
IC
IC
LP
BOL
BOL
BENCH
IC
DR
DR
NP
NP
WST
MKR
LP
MKR
LP
LP
TCB
DR
BIN
IC
DR
BS
LP
CB
NP
SP
SP
BOL
BOL
BOL
TB
BIN
DR
BIN
LP
IC
DR
DR
DR
WST
WST
MH
MH
SP
BOL
LP
LP
G
G
G
G
G
G
G
G
G
G
G
G
G
G
G
G
G
G
G
G
G
G
G
G
MH
PT
PT
BENCH
G1
G1
G1
G1
G1
G1
3
4
5
6
7
G8
9
10 11
12
G13
G13
14
G15
16
17
G18
19
G20
21
G22
G23
24
25
26
G27
28
29
30
31
32
33
G34
35
36
37
38
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
G67
G68
69
70
71
G2
G2
G39
G39
G39
G39
G1
0m 1m 3m 5m 10m
RBTECHC o n s u l t i n g L i m i t e d
Tree Constraints Plan
13K146
Arbtech TCP 01
Jan 2013 1:400 @ A1 JCH
Tree
Nos.:
Tree
Canopies:
Trunks:
RPAs:
Category
'A' trees:
Category
'B' trees:
Category
'C' trees:
1
Category
'U' trees:
Trees are categorised in accordance with the cascade chart in Table 1
of the British Standard BS 5837:2005 'Trees in relation to construction -
Recommendations'
Category 'U' - Trees in such condition that they cannot realistically be
retained as living trees in context of the current land use
for longer than 10 years.
Category 'A' - Trees of high quality with an estimated remaining life
expectancy of at least 40 years.
Category 'B' - Trees of moderate quality with an estimated remaining
life expectancy of at least 20 years.
Category 'C' - Trees of low quality with an estimated remaining life
expectancy of at least 10 years, or young trees with a
stem diameter below 150mm.
Tree Categories
In order to avoid damage to the roots or rooting environment of
retained trees, the Root Protection Areas (RPAs) should be plotted
around each of the category A, B and C trees. This is a minimum area
in m² which should be left undisturbed around each retained tree.
The RPA is calculated using the British Standard BS 5837:2012 'Trees
in relation to design, demolition and construction - Recommendations.
The calculated RPA is capped to 707m², which is the equivalent to a
circle with a radius of 15m. Where there appears to be restrictions to
root growth the root protection area is reshaped to more accurately
reflect the likely distribution of the roots.
Root Protection Area
All dimensions should be checked on site. No dimensions are to be scaled from this drawing.
Please notify us of any discrepancies found. Arbtech Consulting Ltd. cannot be held responsible for inaccuracies in
the base drawing in which this plan is based.
This drawing is designed to reflect the principles of the layout or design only, and relates only to the protection of
retained trees.
This drawing is not to be read as a definitive part of the engineering or construction designs or method statement.
An architect or structural engineer should be contacted over any matters of construction, detailing or specification
and for any standards or regulatory requirements relating to proposed structures, hard surfacing or underground
services.
This drawing was produced in colour - a monochrome copy should not be relied upon.
© Arbtech Consulting Ltd, 2012
Bancroft Park
Bancroft
Hitchin
Hertfordshire
Marion Clarke
Arbtech Consulting Ltd 5678552 GB903660148 Directors: R. M. Oates Unit 3 Well House Barn, Chester Road, Chester, CH4 0DH Also in Bedfordshire, Birmingham, Kent, Manchester, Lancashire, London, Surrey and Sussex Tel. 01244 661170 Web. www.arbtech.co.uk E-mail. email@arbtech.co.uk Bancroft Gardens – Arbtech TSR 01
Document Production Record
Document number
Editor Signature Position Issue
number Date
Arbtech TSR 01 Jon Hartley
Surveyor 1 09/01/2014
Limitations
Arbtech Consulting Ltd has prepared this Report for the sole use of the above
named Client/Agent in accordance with our terms of business, under which our
services were performed. No other warranty, expressed or implied, is made as to the
professional advice included in this Report or any other services provided by us. This
Report may not be relied upon by any other party without the prior and express
written agreement of Arbtech Consulting Ltd. The assessments made assume that
the sites and facilities will continue to be used for their current purpose without
significant change. The conclusions and recommendations contained in this Report
are based upon information provided by others and upon the assumption that all
relevant information has been provided by those parties from whom it has been
requested. Information obtained from third parties has not been independently
verified by Arbtech Consulting Ltd.
Copyright
© This Report is the copyright of Arbtech Consulting Ltd. Any unauthorised
reproduction or usage by any person other than the addressee is strictly prohibited.
www.arbtech.co.uk
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