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RFI - 25_06_23_AIA_ SLa_3 Allambi Rise_V2
ARBORICULTURAL REPORT
Arboricultural Impact Assessment
Site Address: 3 Allambi Rise
Noosa Heads, Qld, 4567
Real Property Description:
Local Authority: Noosa Council (NC)
Reference:
Project: Residential Dwelling
Commissioned by: Shaun Lockyer architects (SL|a)
Date of report: Monday, 23 June 2025
Version: Two (2)
Prepared by:
Matthew Duncan
Director / Principal Arborist
e: [email protected]
m: 0450 355 770
ABN: 68 153 548 531
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This document was prepared for the sole use of Shaun Lockyer architects, and any regulatory agencies
involved in this project. No other party should rely on this information without the prior written consent
of Consult Arborist.
The findings laid out in this report are valid for 12 months from the date of the assessment.
If the advice and recommendations made in this report are not strictly adhered to, no responsibility will
be taken for the continuing health and condition of retained trees. Trees are dynamic living organisms
that respond to changes in their environs; repeat assessments are key to maintaining tree vitality and
structural integrity and reducing any potential risk they may pose.
C OPYRIGHT N OTICE
This document is copyrighted and remains the property of Consult Arborist Pty Ltd under the Copyright
Act 1968 (Australia). Unauthorized reproduction, distribution, or modification is strictly prohibited. No
part of this document may be copied, reproduced, or used without prior written permission.
Permitted Use:
• Hard Copies: Clients may print full copies for internal use or project liaison only.
• Electronic Copies: The document must remain in its original PDF format and may only be
shared with agreed parties directly involved in the project.
Consult Arborist Pty Ltd accepts no responsibility for unauthorized or partial use of this report. By using
this document, the recipient agrees to abide by these terms.
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E XECUTIVE S UMMARY This Arboricultural Impact Assessment (AIA) report, commissioned by Shaun Lockyer Architects (SL|a), evaluates 26 existing trees at 3 Allambi Rise, Noosa Heads, in relation to a proposed residential dwelling development plan. The assessment, conducted by Consult Arborist Pty Ltd, provides a comprehensive overview of the site's trees, their current condition, and their suitability for retention during and after development. The report includes a detailed tree survey, a visual tree assessment, and recommendations for tree retention and protection during the construction phase. Key findings highlight the importance of retaining several mature trees to maintain the site's ecological balance and aesthetic value. Of the 26 trees that were inspected onsite, 12 are determined to be in a suitable condition for retention within the design and going forward. These include the High retention value, native trees 23, 24, and 25 in the Environmental Management and Conservation easement, and select council road reserve trees. The report also outlines specific arboricultural works, tree protection guidelines, and mitigation measures to ensure the health and stability of the retained trees throughout the development process. This AIA report is a crucial component of the Development Application lodgement to Noosa Council, ensuring that the proposed development aligns with local environmental regulations and best practices in arboriculture. Version two (2) of this report was completed in response to an Information Request from Noosa Council in June 2025. 25_06_23_AIA_ SLa_3 Allambi Rise_V2 Page 3 of 38
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D OCUMENT C ONTROL
The latest approved version of this 25_06_23_AIA_ SLa_3 Allambi Rise_V2 should be available to all
personnel involved in the Project in consultation with Consult Arborist Pty Ltd.
Each new revision should be distributed to all key personnel for review and endorsement.
Version Date Written Reviewed Approved
One (1) 31/03/2025 MJD SCD MJD
Two (2) 23/06/2025 MJD SCD MJD
D OCUMENTS R EVIEWED
The following documents have been reviewed, analysed, and referenced during the production of this
report.
Reference / Date Title / Details
25/03/2025 250325 - 3 Allambi Rise - Consultant Coordination: shaun lockyer architects
17/10/2024 24_10_17_ASR_SLA_3 Allambi Rise: Consult Arborist
18/06/2025 Westera Partners - Construction Engineers Plans - S25-054 Revised Concept
Issue 18.06.2025 updated
Note: Extracts from the above document have been used to illustrate the text within this report but should be read with full documents.
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C ONTENTS
Copyright Notice ................................................................................................................... 2
Executive Summary .............................................................................................................. 3
Document Control ................................................................................................................. 4
Documents Reviewed ........................................................................................................... 4
1 Brief ............................................................................................................................... 7
2 Site Inspection & Qualifications ...................................................................................... 7
3 Scope and Limitations .................................................................................................... 8
3.1 Wildlife Considerations .......................................................................................... 9
3.2 Contractors Notes.................................................................................................. 9
3.3 Habitat Trees ......................................................................................................... 9
4 Introduction .................................................................................................................. 10
5 Information Request Response 06/2025 ...................................................................... 12
5.1 Tree 1 .................................................................................................................. 12
5.2 Tree 25 ................................................................................................................ 12
6 Project Plans................................................................................................................ 13
7 Tree Assessment ......................................................................................................... 15
7.1 Summary Tree Retention Schedule ..................................................................... 15
7.2 Site Photographs ................................................................................................. 18
7.3 Tree 2 .................................................................................................................. 21
7.4 Trees 7-12 & 17 ................................................................................................... 21
7.5 Trees 23- 25 ........................................................................................................ 21
8 Schedule of Arborist Works .......................................................................................... 22
9 Tree Protection Guidelines (TPG) ................................................................................ 23
9.1 The Role of the Project Arborist and Tree Protection ........................................... 23
9.2 Calculating Tree Protection Zone......................................................................... 24
9.2.1 TPZ – Tree Protection Zone............................................................................. 24
9.2.2 SRZ – Structural Root Zone ............................................................................. 24
9.3 Establishing Tree Protection ................................................................................ 25
9.3.1 TPZ Signs ........................................................................................................ 25
9.3.2 Trunk Protection .............................................................................................. 25
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9.3.3 Restricted Activities Within the TPZ ................................................................. 26
9.3.4 Tree Protection Fencing (TPF)......................................................................... 26
9.4 Site Preparation ................................................................................................... 28
9.5 Tree Clearing Procedures .................................................................................... 28
9.6 Temporary Ground Protection ............................................................................. 29
9.7 General Excavation Methodologies ..................................................................... 30
9.7.1 Hard Surface Removal..................................................................................... 31
9.7.2 Post-Hole Dig .................................................................................................. 31
9.8 Mitigation Measures............................................................................................. 32
10 References: ............................................................................................................. 33
11 Disclaimer and Limitations of Liability ...................................................................... 33
Appendix 1: Definition of Terms .......................................................................................... 34
Appendix 2: Tree Schedule ................................................................................................. 35
Appendix 3: Sample TPZ Fencing Sign ............................................................................... 38
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1 B RIEF
Shaun Lockyer Architects commissioned this Arboricultural Impact Assessment report on
behalf of their client and property owner. Consult Arborist Pty Ltd was requested to assess the
existing trees on the site in relation to the proposed residential dwelling development.
This report will be included in the Development Application lodgement to Noosa Council.
Consult Arborist was requested to provide details of the trees found on the site as part of the
early concept design stage. A complete tree survey was undertaken that included comments
of note on individual trees and their retention value rating to assist with the design process.
This report provides information on a tree’s condition at the time of the assessment and
position within the project design, with recommendations for the suitability for retention of the
trees post-development.
2 S ITE I NSPECTION & Q UALIFICATIONS
Consult Arborist, led by Director and Principal Arborist Matthew Duncan, is a trusted authority
in arboricultural consulting. With over 30 years of industry experience, Matthew holds an AQF
Level 5 Diploma of Arboriculture (AHC50510) and an ISA Tree Risk Assessment Qualification
(valid 2015–2030) and undertook the Visual Tree Assessment on the site from a ground level
on Wednesday, 9 October 2024 with a return site review conducted in March 2025. Since
founding Consult Arborist in 2011, he has provided expert arboricultural guidance for private,
civil, and capital works projects across Queensland. As a Qualified Member and Approved
Consultant of the Queensland Arboricultural Association (QAA), Matthew ensures
professional, informed, and tailored solutions for clients seeking high-quality tree assessment
and management services.
Information provided by the client is considered current and accurate.
Figure 1: Google Maps location of the site 3 Allambi Rise
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3 S COPE AND L IMITATIONS
This Arboricultural Appraisal is based on the International Society of Arboriculture’s Risk
Assessment Methodology for trees. The level of assessment undertaken for this Arboricultural
Appraisal was a basic Level 1 visual assessment of the surrounding area and the subject
tree’s structure and health, from the ground on one side and a Level 2 assessment on all sides
of the tree was completed to assess further any visual defects noted.
It is an assessment that includes the use of basic tools and techniques, i.e., cavity probing,
minor root collar excavation, measuring tapes and devices and photography to gather
information and not a full assessment of any tree’s structural safety. No trunk decay detection
equipment or ground radar was used as part of this Arboricultural Appraisal; no conclusive
comments on what may have been or may be happening within the internal structure of the
tree or the tree’s roots will be made. No tissue or soil samples have been collected or
submitted for testing. All data is based on visual inspection based on known industry
methodology of visual tree assessment VTA, of the tree/s and their location, species, health,
and condition at the time of inspection unless otherwise stated.
The timeframe for this report is the inspection period; re-inspection should occur 1 year from
this inspection.
The information contained in this report is based on a visual inspection of each recorded tree
and its location, species, health, and condition at the time of inspection unless otherwise
stated. It is the author's opinion and is a 'snapshot in time' of the specific tree's health and
condition at the time of the inspection, and no guarantee can be given that faults or issues
may not arise in the future.
The relevant tree information has been recorded to be used as a functional tool to determine
management strategy for the subject trees, considering attributes, conditions, past works,
location, project design, construction, and future use.
This report does not take into consideration changes to the site design or activities of which
Consult Arborist has not been requested to comment on or been advised.
This report should be read in conjunction with all finalised project plans.
Note:
• Photos of the subject trees have been taken with an iPad or iPhone when required, and
the light/exposure has been adapted to improve the clarity of the picture quality.
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3.1 WILDLIFE CONSIDERATIONS Information from the DESI (Department of Environment, Science, and Innovation) should be consulted regarding regulations concerning tree removal. The Nature Conservation Act 1992 provides statutory protection for most species of native animals and any tree work which affects them may constitute an offence. In addition, the Nature Conservation and Other Legislation (Koala Protection) Amendment Regulation amended the Environmental Offsets Regulation 2014, Planning Regulation 2017, Nature Conservation (Koala) Conservation Plan 2017 and Vegetation Management Regulation 2023 to provide increased protection to koala habitat areas in South East Queensland. A qualified Fauna Spotter-Catcher should be consulted prior to tree works being carried out where wildlife may be active. 3.2 CONTRACTORS NOTES Recommended arboricultural works are to be carried out by an arborist holding a minimum of a Level 3 AQF qualification in Arboriculture with good working experience. It is expected that the Arborist may encounter anomalies within the tree as they climb/work and as such may use their discretion to remove any further branches or limbs which they may deem could pose an immediate risk. Additional removals outside the recommendations or defects noted whilst in the tree are to be recorded and reported to the author and/or discussed with a Level 5 Arborist on site prior to undertaking the appropriate action. All pruning is to be in accordance with, or guided by AS 4373 – “Pruning of Amenity Trees” 3.3 HABITAT TREES When undertaking remedial tree works on habitat trees, please be aware of the fauna and their habitat. The creation of future habitats whilst undertaking remedial works is to be considered. When mitigating hazardous deadwood, hollow sections and large branches, minimal pruning or reduction of weight is required rather than total removal. Hollow sections take many years to be created and are a highly valuable habitat. Coronet cuts should be facilitated where appropriate to mimic natural branch failure on suitable trees in a natural setting. Please note that all site activities are to be agreed upon and implemented in accordance with all Health & Safety and Cultural Heritage best practices, with the approval provided by the appropriate project entities. 25_06_23_AIA_ SLa_3 Allambi Rise_V2 Page 9 of 38
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4 I NTRODUCTION
The site at 3 Allambi Rise is located within the Noosa Council coastal suburb of Noosa Heads.
Allambi Rise is on the north-western side of Noosa Heads on a natural hill formation above
Noosa Main Beach. The general area and surrounding roads have good tree cover that blends
into and provides connectivity to the adjoining Noosa Heads National Park. A council-
controlled Environmental Management and Conservation easement runs north-south along
the western boundary of the site.
The treescape at the front of the property is a mix of naturally occurring and planted local
native trees that provide privacy to the site. It is proposed that, where possible, existing trees
will be retained and protected whilst achieving the project design.
Figure 2: LSD - Tree Survey Plan with numbers added by Consult Arborist
The project proposes to demolish the existing dwelling and rebuild, with trees being retained
within the rear garden and selective trees retained in the front garden and road reserve.
Figure 3: Street view of the property.
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Figure 4: Image from Noosa Council illustrating the environmental management and
conservation area of protected vegetation along the western boundary
Figure 5: Easymapmaker street map showing the Tree Protection Zone (TPZ) and
retention value
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5 I NFORMATION R EQUEST R ESPONSE 06/2025
Consult Arborist was requested to undertake a review of the updated proposed Westera
Partners construction plans in relation to the lower floor slab and footings plan. This plan
illustrates the piling that would be used to create the footings for the building.
5.1 TREE 1
Tree 1 is adjacent to the driveway adjacent to the garage door and was originally proposed to
be retained by the project, with consideration given to its protection during the construction
phase. This is no longer achievable due to the updated construction plans requiring continuous
piles to create the foundation support.
To enable the constructability of the piling design, the retention of Tree 1 is not possible due
to direct conflict with the tree’s structural root zone.
5.2 TREE 25
Tree 25 is located at the rear of the property within the Environmental Management
Conservation Easement. This tree is still proposed to be retained with the current piling design
that is required to support the pool not deemed as a major intrusion warranting the tree’s
removal.
Tree protection measures will be implemented to promote the tree’s protection and retention.
Figure 6: Westera Partners – Lower Floor Slab & Footings Plan
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6 P ROJECT P LANS
Figure 6: Site & Locality Plan – Existing
Figure 7: Site & Locality Plan – Demolition
Note 1: The driveway section in front of tree 2 is to be retained to act as ground protection during
the construction phase. Trees 2, 7 - 12, 17, 23, 24, & 25 are proposed to be retained and
protected.
Note 2: Version Two (2) of this report, Tree 1 adjacent to the driveway is now shown for removal.
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( onsult Arborist site & locality plan - proposed 138 Figure 8: Site & Locality Plan — Proposed 25_06_23_AIA_SLa_3 Allambi Rise_V2 Page 14 of 38
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7 T REE A SSESSMENT
As part of the site assessment, a tree survey and plotted plan were produced by LSD of the
key trees 26 on the site. The tree survey provided accurate locations of the trees on the site,
and the arborist assessment provided details on their condition at the time of the assessment,
with additional comments as required regarding their suitability for retention.
7.1 SUMMARY TREE RETENTION SCHEDULE
Common Age Retention Retention
ID Comments
Name Class Value Status
Western side of the driveway, close to the
house.
Lower trunk clear of branches.
Evidence of past pruning resulting in limited
encroachment of the upper canopy on the
1 Flooded gum Mature Medium Remove
dwelling side.
*Updated Lower Floor Slab & Footings Plan
design now conflicts with the tree’s root zone
and obstructs constructability.
Western side of the driveway.
Previously topped and maintained for
Coastal
2 Mature overhead powerline clearance. Medium Retain
cypress
The tree provides good screening from the
street.
Eastern side of the driveway next to the
garage.
Abnormal canopy form over the driveway.
Evidence of past branch/limb removal on the
3 Brushbox Mature Low Remove
lower trunk.
Evidence of root severance next to the
driveway.
Direct design conflict.
Three-stemmed tree (0.3, 0.4, 0.3) towards the
4 Brushbox Mature front of the dwelling. Medium Remove
Direct design conflict.
Planted landscape feature.
5 Pandanus Mature Reduced vigour, low aesthetics Low Remove
Direct design conflict.
Planted landscape feature.
6 Pandanus Mature Low Remove
Direct design conflict.
Tree growing on the council road reserve.
Early
7 Unidentified Reasonable form and structure. Medium Retain
mature
To be retained as a street tree.
Tree growing on the council road reserve.
8 Tuckeroo Mature Reasonable form and structure. Medium Retain
To be retained as a street tree.
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Common Age Retention Retention
ID Comments
Name Class Value Status
Tree growing on the council road reserve.
Pandanus &
9 Mature Slightly suppressed. Low Retain
Cheese tree
Reduced vigour and form.
Understory infill tree.
Coastal
10 Mature Reduced vigour and suppressed by adjacent Low Retain
cypress
larger trees.
Coastal conditions have stunted growth rates.
Pink Reduced/misshapen canopy spread with a
11 Mature Medium Retain
bloodwood clear trunk.
Forms part of a connected canopy.
Coastal conditions have stunted growth rates.
Pink Reduced/misshapen canopy spread with a
12 Mature Medium Retain
bloodwood clear trunk.
Forms part of a connected canopy.
Coastal conditions have stunted growth rates.
13 Brushbox Mature Limited canopy spread with a clear trunk. Medium Remove
Direct design conflict.
Close to the existing dwelling.
Defect in the lower trunk.
14 Brushbox Mature Abnormal asymmetrical canopy form towards Low Remove
the Fig.
Direct design conflict.
Large tree.
Evidence of past branch removal on multiple
Small-leaved
15 Mature occasions with good regrowth noted, resulting Medium Remove
Fig
in an overall reduced canopy spread.
Direct design conflict.
Close to the western boundary creating a
screen and shelter.
16 Strangler Fig Mature Medium Remove
Previously pruned on numerous occasions.
Direct design conflict.
Young understory trees that will grow to create
Early a screen to the east.
17 Brown pine Medium Retain
mature Selective retention and removals can be
incorporated into the landscape design.
Twin stem (0.25, 0.28).
Close to the eastern boundary.
Hard
18 Mature Recently pruned back from the neighbour's Medium Remove
corkwood
dwelling.
Direct design conflict.
Close to the eastern boundary.
The tree was recently pruned back from the
19 Tuckeroo Mature Medium Remove
neighbouring dwelling.
Direct design conflict.
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Common Age Retention Retention
ID Comments
Name Class Value Status
Reduced vigour due to coastal exposure with
Pink
20 Mature depleted. Medium Remove
bloodwood
Direct design conflict.
Pink Reduced vigour due to coastal exposure.
21 Mature Medium Remove
bloodwood Direct design conflict.
Group of planted palms and Pandanus.
22 Pandanus Mature Low Remove
Direct design conflict.
Located on the steep slope on the northern
Pink Advanced side of the dwelling within a natural setting.
23 High Retain
bloodwood Age Unable to access the area due to wet
conditions.
Located on the steep slope on the northern
side of the dwelling close to the western
Advanced
24 Brushbox boundary within a natural setting. High Retain
Age
Unable to access the area due to wet
conditions.
Large old tree close to the rear of the existing
dwelling.
The tree is the main feature of the rear
garden's treescape.
Advanced Evidence of past pruning on the dwelling side,
25 Ironbark High Retain
Age resulting in limited encroachment.
Protection measures are to be implemented
and maintained throughout the construction
phase.
The house has been built around this tree.
Poor tree health and form, displaying reduced
Pink Advanced
26 vigour Low Remove
bloodwood Age
Unsuitable for long-term retention.
Direct design conflict.
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7.2 SITE PHOTOGRAPHS Picture 1: Allambi Tree 01 Picture 2: Allambi Tree 02 Picture 3: Allambi Tree 03 Picture 4: Allambi Tree 04 Picture 5: Allambi Tree 05 Picture 6: Allambi Tree 06 Picture 7: Allambi Tree 07 Picture 8: Allambi Tree 08 Picture 9: Allambi Tree 09 25_06_23_AIA_ SLa_3 Allambi Rise_V2 Page 18 of 38
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Picture 10: Allambi Tree 10 Picture 11: Allambi Tree 11 Picture 12: Allambi Tree 12 Picture 13: Allambi Tree 13 Picture 14: Allambi Tree 14 Picture 15: Allambi Tree 15 Picture 16: Allambi Tree 16 Picture 17: Allambi Tree 17 Picture 18: Allambi Tree 18 25_06_23_AIA_ SLa_3 Allambi Rise_V2 Page 19 of 38
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Picture 19: Allambi Tree 19 Picture 20: Allambi Tree 20 Picture 21: Allambi Tree 21 Picture 22: Allambi Tree 22 Picture 23: Allambi Tree 23 Picture 24: Allambi Tree 24 Picture 25: Allambi Tree 25 Picture 26: Allambi Tree 26 25_06_23_AIA_ SLa_3 Allambi Rise_V2 Page 20 of 38
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7.3 TREE 2 It is proposed that tree 2 is to be retained on the southern side of the driveway, with the area beneath the tree fenced off to prevent access beneath it during the build. The existing driveway appears to be relatively new and currently offers protection for the tree’s root systems beneath. It is proposed and noted on the project design plans that the existing driveway is to be retained during the construction phase. Towards the end of the build, once all major works have been completed, the new driveway is to be built. The plans show that very little change in levels is required to build the new driveway. The awarded builder is to consult with the appointed Project Arborist before the removal of the old driveway, and any earthworks are to be reviewed, and the levels double-checked. If excavation is required, this is to be undertaken under the supervision of the Project Arborist. 7.4 TREES 7-12 & 17 Trees 7-12 and 17 are proposed to be retained. This group of trees is to be fenced to prevent access beneath the trees. The TPZ fencing is to be erected in an area guided by AS4970 guidelines and advised by the Project Arborist. Ideally, the understory lower-order plants are to be carefully removed by hand, and 100mm of mulch spread to cover the ground area of the TPZ. 7.5 TREES 23- 25 Trees 23, 24, and 25 are located to the rear of the property, with tree 25 being the closest to the build. Trees 23 and 24 are down the embankment and away from the main site. A TPZ area is to be created between tree 25 and the build line to prevent access beneath the tree. It was advised that support piers are required to be formed within the outer TPZ of Tree 25. These works are to be discussed with the awarded builder and Project Arborist prior to works commencing and overseen by the Project Arborist during the works, if required. 25_06_23_AIA_ SLa_3 Allambi Rise_V2 Page 21 of 38
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8 S CHEDULE OF A RBORIST W ORKS
Prior to Demolition
• Retained trees are to be clearly marked with green ribbon.
• Site meeting to be held with the Awarded Builder, Tree, and Demolition contractors.
• Establishment of Tree protection fencing, to be erected and maintained by the awarded
Builder.
• Trees are to be carefully removed, Project Arborist to inspect on completion.
• The house is to be demolished, staying clear of retained trees and their TPZ.
• TPZ areas to be maintained and respected
During Construction
• Prestart with the Project Arborist and the awarded Builder to discuss tree retention and
protection during the build
• Site visits are to be documented to comply with Noosa Council DA conditions relating
to retained existing trees
• Site/tree monitoring and reporting by the Project Arborist with regular meetings with
the awarded Builder
Construction
• On completion of the build the Project Arborist is to review the retained trees and
produce a brief written assessment with maintenance recommendations if required
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9 T REE P ROTECTION G UIDELINES (TPG) For the proposed retention of the above trees onsite, the following guidelines are recommended to be implemented to minimise the impact of the Project works. The protection recommendations offered will be guided by, AS4790 – 2009 Protection of trees on development sites, industry best practice and the supervising presence of a suitably qualified and experienced Arborist with a high level of experience as an onsite Project Arborist. The information within these Guidelines is generic and can be used within the project as required. The successful retention of the trees will be bettered by the education and cooperation of all parties of the construction team during the build and the presence of the Project Arborist on site to assist and advise during the construction phase for all works carried out adjacent to the TPZ of protected trees. ALL workers on the site are to be made aware of the Tree Protection Guidelines and any site- specific measures by the main contractor prior to commencing works. 9.1 THE ROLE OF THE PROJECT ARBORIST AND TREE PROTECTION An Arboricultural Assessment was undertaken by the Consult Arborist for the trees that require consideration. The information within this Arboricultural Impact Assessment report should be read in conjunction with guidelines laid out in the Australian Standard, AS4970–2009 Protection of Trees on Development Sites and ongoing advice from the Project Arborist. A designated onsite foreman/supervisor from the construction company is to liaise with the Project Arborist to ensure that Tree Protection is adhered to in their absence from the site. Project Arborist to undertake regular inspection and supervision of works adjacent to the exclusion zone in consultation with the Project Team. A post-construction Arborist Report can be prepared by the Project Arborist on request for the retained tree comprising a Visual Tree Assessment detailing each of the trees’ condition and vigour, damage or disturbance which may have occurred, and remedial works undertaken. After the final inspection, a Certification of Compliance can be supplied, along with any monitoring documentation as required. The Project Arborist may at any time implement new or additional procedures as may be required for the site in the best interest of the trees and the development as a whole. 25_06_23_AIA_ SLa_3 Allambi Rise_V2 Page 23 of 38
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9.2 CALCULATING TREE PROTECTION ZONE
The descriptions of the Tree Protection Zone (TPZ) and Structural Root Zone (SRZ) are taken
from the Australian Standards, AS 4970-2009 Protection of trees on development sites. These
descriptions only give the basic outline to calculate the TPZ and SRZ when encroachment or
reduction in the size/area of the TPZ is required to facilitate the development; these can also
be calculated: see Appendix D of the Australian Standard AS 4970-2009.
9.2.1 TPZ – TREE PROTECTION ZONE
As specified in the Australian Standard, AS 4970-2009, the TPZ is the principal means of
protecting trees on a development site. The TPZ calculates the radius of a circular area by
combining the root and crown spread of a tree for protection and isolation from construction
disturbance so the tree can remain viable for the future. The TPZ incorporates the SRZ.
DBH = Diameter at Breast Height - trunk diameter measured at 1.4m above ground
TPZ RADIUS = Twelve times the DBH
Example: 0.5m DBH x 12 = 6m TPZ RADIUS.
A TPZ should not be less than 2m or greater than 15m (unless crown protection is required).
9.2.2 SRZ – STRUCTURAL ROOT ZONE
The SRZ, as specified in AS 4970-2009, is the minimum surface area of protection required
around a tree to maintain that tree’s stability – a larger area than this is required to maintain a
tree in a viable condition for the future. It is only necessary to calculate the SRZ when major
encroachment into a TPZ is proposed.
An indicative SRZ RADIUS can be determined from the lower trunk diameter (above the root
buttress), D, measured in metres and applying the following formula:
0.42
RSRZ = (D x 50) x 0.64
The SRZ for trees with a trunk diameter of less than 0.15m will automatically be 1.5m.
Please note that these are theoretical calculations and are to be used as a guide. Large tree
species, especially Fig trees, will have woody structural and feeder roots that extend to a
greater distance than the calculations. Trees within urban environments where solid
structures restrict root growth can also alter a tree’s root spread and direction. An additional
water/food source would also encourage roots to grow further than expected.
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9.3 ESTABLISHING TREE PROTECTION
Figure 9 below shows a typical representation of a tree protection system. Tree root systems
are generally shallow with the majority found within the top 1m of soil and a higher density of
roots found closest to the surface where moisture and nutrients are more readily available.
The function of the TPZ is to ensure the tree has a viable root system, so it remains a functional
future as an amenity asset within the development.
The structural standing of a tree is linked to critical aspects of roots (found in the TPZ) to bind
the soil and create a mass that the tree can anchor to. These roots consist of ‘Secondary roots’
(medium size) and ‘Tertiary roots’ (small size).
Primary roots (large size) found in the SRZ connect the Tree to the anchor system. Primary
roots by themselves do not bind enough soil to create a stable anchor system.
The shallow nature of tree roots should be taken into consideration when working close to
trees and when installing the tree protection fencing for the TPZ.
Figure 9: Example of an ideal generic Tree Protection System
9.3.1 TPZ SIGNS
The signs in Appendix 2 – Sample TPZ Sign, identifying the TPZ are to be placed around the
edge of the TPZ in locations visible to the site as per Tree Protection Fencing Standards
Australia marketing media AS4970 – 2009.
9.3.2 TRUNK PROTECTION
Trunk protection, to prevent direct contact with the tree’s trunk and buttress roots, can be
installed. This can comprise of Geo fab/20mm thick hessian and wooden battens
strapped/taped to the tree’s trunk with a skirt over the buttress roots.
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9.3.3 RESTRICTED ACTIVITIES WITHIN THE TPZ
Restricted activities within the TPZ / Exclusion Zone that would cause harm to the retained
trees include, but are not limited to:
• Any non-approved construction works.
• Any non-approved excavation or cultivation of the ground.
• Any non-approved storage.
• Preparation of chemicals, including cement products.
• Parking of vehicles and plant.
• Refuelling.
• Dumping of waste.
• Wash down and cleaning of equipment.
• Placement of Fill.
• Lighting fires.
• Any non-approved soil level changes.
• Temporary or permanent installation of utilities and signs.
• Physical damage to the tree.
9.3.4 TREE PROTECTION FENCING (TPF)
The Tree Protection Fencing (TPF) is to be steel mesh panels (as detailed in AS4687-2007
Temporary fencing and hoardings) and held in place with concrete feet, the nut and bolt
holding the clamps are to be secured and tightened with a spanner to prevent the fence from
being easily moved and to restrict access to those with permission only. Shade cloth or
something similar can be attached to the fence to protect the area from airborne matter if
required. Uneven ground and/or exposed sites may require additional staking to hold the
fencing in place. Care is to be taken when installing the additional bracing so as not to damage
tree roots or hit underground services.
Where the adequate TPZ is not achievable, the TPF can be erected in a non-standard
alignment and additional measures, including ground protection, e.g., Trak-mats/geo fabric
and mulch to spread the load of site activities and minimise ground disturbance. These
measures will be established between the developer and the Project Arborist.
As an alternative to steel mesh panels for temporary or low access areas, TPZ fencing may
consist of 1m high plastic orange mesh barrier fencing or a double row of flagging with star
pickets with end caps as support, spaced at 4 – 5m and attached with zip ties. This style of
fencing is deemed suitable for larger sites when work activities are generally to be within the
central area of the site with the proposed retained trees on the periphery and away from main
site activities.
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Figure 10: Standard TPF with ground protection mulch
Figure 11: TPF adjacent bushland with fauna access
Figure 12: Exclusion Zones with Trunk Protection
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9.4 SITE PREPARATION
When the final design is agreed upon and the areas for tree protection are established, Site
Preparation is to be undertaken.
One of the key elements of tree preservation is to ensure that the ground around the tree is
unharmed and/or improved. Poor soil conditions will cause a slow death to trees over many
years. The effects on the health of the tree of soil compaction caused by site traffic, storage
of materials and other factors are often underestimated.
Protecting the surrounding ground in which a tree grows is key. Trees naturally grow in shaded
forests with tree debris covering the ground. Trees that grow in grass with compacted and
depleted soil will not be as healthy as trees growing in mulched garden beds. Placing mulch
over the tree protection area will assist in improving the soil conditions and encourage
beneficial soil life while discouraging access.
• Trees for removal will be clearly marked by the Project Arborist.
• Trees requiring work will be clearly marked by the Project Arborist.
• Remove unwanted plants by hand within the Tree Protection Zone; no grubbing of stumps
and roots.
• Remove permitted trees – cross-check with the approved plans and the markings by the
Project Arborist – If in Doubt, Shout Out!
• Undertake any agreed pruning on the grounds of safety, canopy/structural improvements,
or to prevent conflict during the works, under the supervision of the Project Arborist in
accordance with the AS 4373 – 2007 Pruning of amenity trees.
• Apply organic seaweed-based plant food and soil conditioner.
• Where possible cover with 50-100mm of composed forest mulch (not any form of Pine
bark or chip). Site mulch can be used where it does not contain weed species seeds.
• When required, supplemental watering with a water cart or sprinkler system can be used
to retain adequate moisture levels in the soil.
• Install TPZ fencing and signs on the agreed alignments under the supervision of the
Project Arborist.
• Do not adjust the TPZ fencing without permission.
9.5 TREE CLEARING PROCEDURES
• The construction footprint is to be pegged as early as possible, with detailed surveying
plans clearly delineating the extent of clearing and individual trees/vegetation to be
retained.
• Before clearing, tree numbers must be cross-checked with the retention/removal plans.
• Retained trees will be fenced in accordance with the procedures outlined.
• When removing trees, all care is to be taken not to damage or otherwise harm retained
trees.
• Mulch woody weed species only if they are free from any form of seeds during the time of
works; remove arisings off-site if trees are seed-bearing.
• Where practical, retain and process cleared vegetation through a mechanical chipper for
redistribution on site as organic mulch; the stockpile location is to be situated away from
retained trees and drainage courses for future distribution.
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9.6 TEMPORARY GROUND PROTECTION
Where access over the TPZ area is required during construction, site preparation is crucial to
minimise damage and disturbance to the ground in which the roots of the trees are growing.
These measures aim to reduce the compaction and disturbance to the soil, spreading the load
of machinery and preventing wheel/track ruts from site machinery. There is a range of
measures and materials that can be used to achieve this. The level of ground protection
required is determined by the load, actions, and frequency of access for works to be
undertaken.
• 200mm of forest mulch placed over root zones where occasional, light access only is
to occur.
• Geotextile membrane can be laid on the surface with aggregate placed on top to create
light vehicle access.
• Suitably thick rumble boards (e.g. pine sleepers) can be strapped together and laid
over the aggregate for additional load bearing capacity.
• For light rubber track/wheeled vehicles, and/or heavy pedestrian use, ground
protection mats are considered suitable.
• These temporary measures can be wholly removed when access is no longer required.
• The mulch can be reused and spread throughout the site.
Figure 13: Light vehicle ground protection Figure 14: Trak Mats, Image from
www.shorehire.com.au website
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9.7 GENERAL EXCAVATION METHODOLOGIES
Details below give examples of works methodology to excavate a trench or general excavation
when working in proximity to trees.
When using a mechanical excavator, ground protection is advisable to minimise compaction
and damage to the surrounding soil and roots. With a combination of a small bucket and ripper,
the spoil from the trench can be carefully extracted. General excavation is to be undertaken,
when possible, with the bucket positioned perpendicular to the tree, and the spoil dug away
from the tree, this helps to minimise roots being accidentally torn or fractured.
When excavations are being undertaken within a tree's root zone, all necessary precautions
are to be adhered to. The Project Arborist will advise on the progression of the works and
undertake root pruning as required.
Roots deemed to be pruned and removed are to be carefully cut using a sharp saw and/or
secateurs. Root removal is carried out by the Project Arborist on a root-by-root basis taking
into consideration the type of tree, distance from the cut to the tree, and the size and number
of roots found.
Where possible trenches and excavations are to be carefully backfilled using topsoil from the
site or imported topsoil with a low organic matter content and lightly compacted by hand within
the tree zone. Ideally, the ground is then irrigated to increase moisture in the soil (not
waterlogged) and where possible 100mm of mulch is spread to cover the surface area.
Where possible, create a preliminary trench/excavation at the outer edges of the required cut
line using a Hydro-vacuum excavator. Roots found can be cleanly cut by the Project Arborist.
Once the preliminary cut line is completed, excavation of the remaining area outside the cut
line can be dug using the appropriate excavator with all due care and attention to the adjacent
protected trees.
Figure 15: Example of preliminary trench/excavation cuts
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9.7.1 HARD SURFACE REMOVAL Where the Project requires the removal of existing roadways/hard surfaces adjacent to the subject retained trees, these require careful removal overseen by the onsite Project Arborist working alongside the contractors. Cut sections of the old surface can be removed with the use of an excavator sitting and working away from the tree. Hand jackhammers or concrete cutting tools may be required when in proximity to the tree/roots. Begin the process of removal in the area closest to the tree and work removing smaller sections away from the tree until in a safe location. Machinery is not to be used on non-protected or bare ground within the TPZ or Exclusion Zone. The excavation of any ground within or adjacent to retained trees should be cut perpendicularly to the tree to reduce the likelihood of roots being split or damaged longitudinally and is to be overseen by the Project Arborist. Exposed roots are to be covered with either damp hessian or sandy loam to protect the roots from drying out before the construction of the new surface. 9.7.2 POST-HOLE DIG The Project Arborist is to be onsite to oversee and guide all works within the TPZ of protected trees. Ground protection measures can be implemented. A Post-Hole can be any form of cylindrical hole in the ground that facilitates the installation of a post, e.g., fence post or pier foundations. Depth will be determined by engineering requirements. The top 1m of all post-holes inside the calculated TPZ of retained trees will be created with a Hydro-Vacuum Excavator (Sucker Truck) to determine the presence of tree roots. Below this depth, an auger can be used to remove the remaining spoil as the presence of roots below this on this site is unlikely. The excavator operating the augur is to be sat outside the calculated TPZ wherever possible to reduce ground compaction. A combination can be used of a larger machine with greater reach and a smaller mini excavator (under 3.5 tons) when access to the TPZ is required. Pole-hole spoil is to be spread away from the TPZ of retained trees unless otherwise directed by the Project Arborist. Large roots over 100mm will be retained wherever possible, with the post hole relocated. Where roots between 50-100mm in diameter are located, the Project Arborist will assess them on an individual and species basis and determine if the hole is required to be relocated or if it is suitable for the Project Arborist to prune. Roots under 50mm in diameter will be cleanly cut by the Project Arborist when uncovered. Turning and screwing of machinery tracks and wheels is to be kept to a minimum. The site within and adjacent to the retained tree’s TPZ is to be left clean of construction waste and the mulch and spoil to be evenly spread as directed by the Project Arborist. 25_06_23_AIA_ SLa_3 Allambi Rise_V2 Page 31 of 38
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9.8 MITIGATION MEASURES
Remediation measures can be undertaken to limit and reduce any negative effects that may
occur. Where suitable, the retained trees’ TPZ areas are to be improved to provide a more
favourable and beneficial growing environment for the trees’ roots.
Where the soil levels are required to be raised a sandy loam is to be used. This will improve
drainage and allow for gaseous exchange. Trees can adapt to low levels of Fill being placed
over the existing ground if undertaken with the correct material. In some cases, this additional
medium can also provide ideal rooting conditions for feeder roots and a beneficial food source
for the tree.
The following recommendations could be taken to improve an existing plant’s vigour and will,
in turn, benefit the plant’s health, safety, and the amenity that it provides and can be
incorporated with the project landscaping details.
Where groundworks are carried out adjacent to or encroaching into the TPZ areas, the
following mitigation measures and procedures should be implemented where deemed
appropriate and should be supervised by Consult Arborist.
• Where possible, the excavated ground, including the cut roots, will be covered/backfilled
with quality topsoil locally sourced or a sandy loam/river sand with low organic matter, as
guided by AS 4419—2003. Australian Standard™ Soils for landscaping and garden use.
• An application of seaweed-based soil conditioner/plant food can be applied to the topsoil
as per the manufacturer’s guidelines. Monthly applications are recommended for the
duration of the project.
• When required supplemental watering with a water cart or sprinkler system can be used
to retain adequate moisture levels in the soil.
• The Project Arborist is to advise and oversee all mitigation measure works being
undertaken on retained trees.
All tree works and tree protection measures are to be guided by industry best practices and
the relative Australian Standards, which include but are not limited to:
• Australian Standards AS4970-2009 Protection of trees on development sites
• Australian Standards AS4373-2007 Pruning of amenity trees
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10 R EFERENCES :
• Australian Standards AS4970-2009 Protection of trees on development sites (2009).
• Australian Standards AS 4373 – 2007 Pruning of amenity trees. (2007).
• Barton, A. (2003). Wild plants of greater Brisbane. South Brisbane, Qld, Australia: Published by the Queensland Museum,
in partnership with the Environment and Parks Branch of the Brisbane City Council.
• Dunster, J., Smiley, E., Matheny, N. and Lilly, S. (n.d.). Tree risk assessment manual.
• Haslam, S. and Hauser, J. (2011). Noosa's native plants. Tewantin (Qld.): Noosa Integrated Catchment Assoc. Inc.
• Hayes, E. (2001). Evaluating tree defects. [S.l.]: Safetrees.
• Lonsdale, D. (1999). Principles of tree hazard assessment and management. London: Forestry Commission.
• Mattheck, C., Breloer, H., Lonsdale, D. and Strouts, R. (2003). The body language of trees. London: The Stationery Office.
• Strouts, R. and Winter, T. (1998). Diagnosis of ill-health in trees. Colegate, Norwich: Crown.
• IACA, 2010, IACA Significance of a Tree, Assessment Rating System (STARS), Institute of Australian Consulting
Arboriculturists, Australia, www.iaca.org.au
11 D ISCLAIMER AND L IMITATIONS OF L IABILITY
The information contained in this report has been prepared independently, free of any bias and represents the honest opinion of
the consulting arborist.
All data is based on visual inspection of the tree(s) and their location at the time of writing unless otherwise stated. The report
includes opinions, advice, and recommendations based on information gathered during site inspections conducted by the author
and data supplied by the Client (Shaun Lockyer architects (SL|a)).
All information received from the Client shall be deemed to be true, accurate and up to date.
To the extent permitted by law, you agree Consult Arborist Pty Ltd is not liable to you or any person or entity for any loss of or
damage (including loss or damage resulting from negligence), either directly or indirectly, arising from your use of the information
presented in this report. In no event will the author be liable for any lost revenue or profits, or for any special, indirect,
consequential, or incidental damages (however caused and regardless of the theory of liability) arising out of or related to your
use of this information, even if the author has been advised of the possibility of such a loss or damage.
Consult Arborist Pty Ltd cannot be held responsible for the effects of non-conformance works carried out by inadequately qualified
staff or without the supervision of Consult Arborist.
Unless otherwise stated, this report may not be used in a court of law or any legal proceeding without the prior consent of Consult
Arborist Pty Ltd. The author is not required to provide testimony or attend court based on this report unless subsequent contractual
arrangements have been made.
The information contained in this report pertains solely to the tree(s) that were inspected in October 2024 on 10/03/2025 and
reflects their condition at the time of the inspection.
No warranty or guarantee, expressed or implied, is made that the problems or deficiencies identified in the plants or property will
not arise in the future. Likewise, remedial treatments cannot be guaranteed.
Arborists cannot detect every condition that could potentially lead to the structural failure of a tree. Trees are living organisms
that fail in ways not fully understood, and conditions can often remain hidden within a tree or below ground. Consult Arborist Pty
Ltd and the author cannot guarantee that a tree will be healthy or safe under all circumstances or for a specified period.
This report does not account for the possibility of extreme weather events or other factors beyond the control of Consult Arborist
Pty Ltd.
Treatment, pruning, and removal of trees may involve considerations beyond the scope of the arborist’s services, such as property
boundaries, ownership issues, disputes between neighbours, sightlines, landlord-tenant matters and similar concerns. Consult
Arborist Pty Ltd cannot address such issues unless complete and accurate information is provided. Furthermore, Consult Arborist
Pty Ltd cannot be held responsible for the authorization or non-authorization of any recommended treatment or remedial measure.
Arborists are specialists who use their education, knowledge, training, and experience to examine trees, recommend measures
to enhance the beauty and health of trees and attempt to reduce the risk of living near trees. While trees can be managed, they
cannot be controlled. To live or work near a tree involves inherent risks, and the only way to eliminate all risks associated with a
tree is to remove it entirely.
Clients may choose to accept or disregard the recommendations of Consult Arborist Pty Ltd or to seek additional advice.
25_06_23_AIA_ SLa_3 Allambi Rise_V2 Page 33 of 38
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A PPENDIX 1: D EFINITION OF T ERMS
Age Class (AC):
Y Young: Early stage of growth, immature size
EM Early Mature: Fast-growing well-established tree which has not yet reached mature size
M Mature: The tree reached its mature size, and exhibits slowing growth rates with early stages of naturally forming
dead or dysfunctional wood.
OM Over Mature: The tree has reached mature size and is unlike to increase significantly in height or mass.
Retrenchment of the upper crown with increased vegetative vitality in the lower crown, increased fungal activity
and wood decay, and increased colonisation by flora and fauna.
V: Veteran: Tree with advanced retrenchment, reduced crown size and annual increment growth, extensive hollowing,
crown collapse, low vigour, advanced heartwood decay, advanced colonisation by fauna and flora.
Health (H):
GH Good: Tree with no defects or disorders which are notable. Full canopy with good colour foliage. Minimal pathogen
damage.
FH Fair: Tree with minor defects or disorders which are notable. Some dead wood within what can be an unbalanced
canopy, foliage generally with good colour although some discolouration may be present typical of species in
location. Minor pathogen damage.
PH Poor: Tree with major defects or disorders which are notable. The tree has considerable deadwood present, and
discoloured or distorted leaves indicating a further decline of the tree. Detrimental pathogen damage.
D Dead or dysfunctional moribund tree.
Structure (St):
GS Good: Tree with good unions and no branch defects. Sound trunk with no / minor defects. Good buttress and root
structure.
FS Fair: Tree with minor defects or disorders which are notable. Small areas of bark missing. Small cavities or minor
unfavourable branch unions may be present. Minor damage to roots.
PS Poor: Tree with major defects, large hollows, weak unions and/or problematic damaged roots.
HS Hazardous: This implies a tree with a major defect that may fail at any time
Abbreviations:
DBH Diameter at Breast Height - The approximate diameter of the trunk measured visually in millimetres or meters at a
height of 1.4m.
TPZ The Tree Protection Zone, as per AS 4970-2009 Protection of trees on development sites, is the principal means
of protecting trees on a development site. The TPZ is a combination of the root and crown area requiring protection
to be isolated from construction disturbance so that the tree can remain in a viable condition. The TPZ incorporates
the Structural Root Zone (SRZ).
The radius of the TPZ = DBH x 12
A TPZ should not be less than 2m or greater than 15m (unless crown protection is required).
SRZ The Structural Root Zone, as per AS 4970-2009 Protection of trees on development sites, is a mathematical
calculation of the surface area of protection required to maintain a tree’s stability – a larger area is required to
maintain a tree in viable health. It is only necessary to calculate the SRZ when a major encroachment into a TPZ
is proposed.
Tree Retention Value:
The retention value status is based on industry-recognised methods of ascertaining the retention value of a tree. The suitability
of the tree for preservation or retention is based on the individual qualities of each tree. By taking into consideration the health,
structural condition, aesthetics, age, size, longevity (Safe Useful Life Expectancy) and ability to adapt to new environments the
viability of the tree can be reasonably determined.
For trees in non-use areas (e.g., Open spaces) where a range in tree quality is appropriate, all trees may be considered
suitable, except for invasive species.
Suitability for Retention/Preservation Categories are:
High: Tree retention is the priority.
The tree has high amenity, heritage and/or environmental value. It is in reasonably good condition (any minor
structural or health problems can be mitigated), has a long life expectancy and can recover from injury or
respond to environmental changes.
Medium: Tree retention is desirable.
The tree is in fair-good condition, is a locally common species, the tree contributes to the aesthetics of its
locality and should survive for many years. The tree may have health or structural problems that can be
mitigated with treatment.
Low: The tree is not considered worthy of special measures to ensure its retention.
The tree is in poor condition with significant defects that cannot be mitigated, has a short Useful Life
Expectancy, or the tree is expected to decline regardless of treatment. The tree has low value in the
landscape or is an undesirable species.
Very Low/ Tree removal is recommended.
Remove: Trees are considered potentially hazardous, have very poor specimens, and/or may be environmental or
noxious weeds.
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A PPENDIX 2: T REE S CHEDULE
Botanical Common Attributes Size (m) Retention
ID Comments
Name Name AC H St Ht CS DBH TPZ SRZ Status
Western side of the driveway,
close to the house.
Lower trunk clear of branches.
Evidence of past pruning
resulting in limited
encroachment of the upper
Eucalyptus Flooded 20- 10-
1 Mature Good Fair 0.7 8.4 3.1 canopy on the dwelling side. Remove
grandis gum 25 12
*Updated Lower Floor Slab +
Footings Plan design now
conflicts with the tree’s root
zone and obstructs
constructability.
Western side of the driveway.
Previously topped and
Callitris Coastal maintained for overhead
2 Mature Good Fair 6-8 6-8 0.46 5.52 2.8 Retain
columellaris cypress powerline clearance.
The tree provides good
screening from the street.
Eastern side of the driveway
next to the garage.
Abnormal canopy form over the
driveway.
Lophostemon 12-
3 Brushbox Mature Fair Fair 8-10 0.43 5.16 2.5 Evidence of past branch/limb Remove
confertus 14
removal on the lower trunk.
Evidence of root severance next
to the driveway.
Direct design conflict.
Three-stemmed tree (0.3, 0.4,
Lophostemon 14- 10- 0.3) towards the front of the
4 Brushbox Mature Good Fair 0.58 6.96 2.8 Remove
confertus 16 12 dwelling.
Direct design conflict.
Planted landscape feature.
Pandanus
5 Pandanus Mature Poor Fair 6-8 4-6 0.3 3.6 2.2 Reduced vigour, low aesthetics Remove
tectorius
Direct design conflict.
Pandanus Planted landscape feature.
6 Pandanus Mature Fair Fair 4-6 4-6 0.25 3 2 Remove
tectorius Direct design conflict.
Tree growing on the council
Early road reserve.
7 Unidentified Good Fair 6-8 2-4 0.13 1.56 1.5 Retain
mature Reasonable form and structure.
To be retained as a street tree.
Tree growing on the council
Cupaniopsis road reserve.
8 Tuckeroo Mature Good Good 8-10 6-8 0.35 4.2 2.3 Retain
anacardioides Reasonable form and structure.
To be retained as a street tree.
Pandanus Tree growing on the council
tectorius & Pandanus & 0.3- road reserve.
9 Mature Fair Fair 6-8 6-8 4.8 2.43 Retain
Glochidion Cheese tree 0.4 Slightly suppressed.
ferdinandi Reduced vigour and form.
Understory infill tree.
Callitris Coastal Reduced vigour and
10 Mature Fair Fair 6-8 4-6 0.3 3.6 2.25 Retain
columellaris cypress suppressed by adjacent larger
trees.
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Botanical Common Attributes Size (m) Retention
ID Comments
Name Name AC H St Ht CS DBH TPZ SRZ Status
Coastal conditions have stunted
growth rates.
Corymbia Pink 12- Reduced/misshapen canopy
11 Mature Fair Fair 6-8 0.4 4.8 2.43 Retain
intermedia bloodwood 14 spread with a clear trunk.
Forms part of a connected
canopy.
Coastal conditions have stunted
growth rates.
Corymbia Pink Reduced/misshapen canopy
12 Mature Fair Fair 8-10 4-6 0.28 3.36 2.1 Retain
intermedia bloodwood spread with a clear trunk.
Forms part of a connected
canopy.
Coastal conditions have stunted
growth rates.
Lophostemon 10-
13 Brushbox Mature Fair Fair 4-6 0.36 4.32 2.3 Limited canopy spread with a Remove
confertus 12
clear trunk.
Direct design conflict.
Close to the existing dwelling.
Defect in the lower trunk.
Lophostemon 10-
14 Brushbox Mature Fair Poor 4-6 0.43 5.16 2.5 Abnormal asymmetrical canopy Remove
confertus 12
form towards the Fig.
Direct design conflict.
Large tree.
Evidence of past branch
removal on multiple occasions
Small- 16- 12-
15 Ficus obliqua Mature Good Good 1.5m+ 15 4.3 with good regrowth noted Remove
leaved Fig 20 14
resulting in an overall reduced
canopy spread.
Direct design conflict.
Close to the western boundary
creating a screen and shelter.
Ficus Strangler 12-
16 Mature Good Good 6-8 0.8-1 10.80 3.4 Previously pruned on numerous Remove
watkinsiana Fig 14
occasions.
Direct design conflict.
Young understory trees that will
grow to create a screen to the
Podocarpus Early 0.1- east.
17 Brown pine Good Good 4-6 2-4 2 1.7 Retain
elatus mature 0.2 Selective retention and
removals can be incorporated
into the landscape design.
Twin stem (0.25, 0.28).
Close to the eastern boundary.
Endiandra Hard 10-
18 Mature Fair Fair 4-6 0.38 4.56 2.4 Recently pruned back from the Remove
sieberi corkwood 12
neighbour's dwelling.
Direct design conflict.
Close to the eastern boundary.
The tree was recently pruned
Cupaniopsis
19 Tuckeroo Mature Fair Fair 8-10 6-8 0.45 5.4 2.6 back from the neighbouring Remove
anacardioides
dwelling.
Direct design conflict.
Reduced vigour due to coastal
Corymbia Pink 10-
20 Mature Fair Good 4-6 0.4 4.8 2.4 exposure with depleted. Remove
intermedia bloodwood 12
Direct design conflict.
Reduced vigour due to coastal
Corymbia Pink 10-
21 Mature Fair Good 6-8 0.5 6 2.7 exposure. Remove
intermedia bloodwood 12
Direct design conflict.
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Botanical Common Attributes Size (m) Retention
ID Comments
Name Name AC H St Ht CS DBH TPZ SRZ Status
Group of planted palms and
Pandanus 0.2-
22 Pandanus Mature Fair Fair 8-10 2-4 3 2 Pandanus. Remove
tectorius 0.3
Direct design conflict.
Located on the steep slope on
the northern side of the dwelling
Corymbia Pink 12- 12- 0.7-
23 AA Fair Fair 8.4 3.1 within a natural setting. Retain
intermedia bloodwood 14 14 0.8
Unable to access the area due
to wet conditions.
Located on the steep slope on
the northern side of the dwelling
Lophostemon 12- 0.6- close to the western boundary
24 Brushbox AA Good Good 6-8 7.2 2.9 Retain
confertus 14 0.7 within a natural setting.
Unable to access the area due
to wet conditions.
Large old tree close to the rear
of the existing dwelling.
The tree is the main feature of
Eucalyptus 14- 10- 0.7-
25 Ironbark AA Good Good 8.4 3.1 the rear garden's treescape. Retain
species 16 12 0.8
Evidence of past pruning on the
dwelling side, resulting in limited
encroachment.
The house has been built
around this tree.
Poor tree health and form,
Corymbia Pink 10-
26 AA Poor Fair 6-8 0.6 7.2 2.9 displaying reduced vigour Remove
intermedia bloodwood 12
Unsuitable for long-term
retention.
Direct design conflict.
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( onsult \rborist APPENDIX 3: SAMPLE TPZ FENCING SIGN onsult rborist Today's trees for tomorrow Tree Protection Zone N@ ACCESS Tree Protection Measures are in place as per AS 4970-2009: No unauthorised entry of persons or plant for any reason. No works of storage in or near this zone. This tree protection barrier should remain in good condition and must not be altered or removed. e Refer to the Arborist Reports for more details. Australian Standards, AS 4970-2009, Protection of trees on development sites For more information contact: Phone: 25_06_23 AIA_SLa_3 Allambi Rise_V2 Page 38 of 38