HomeMy WebLinkAboutEx08_Tree Assessment (2).pdf
Renton Market and Piazza Improvement Project
Tree Inventory, Assessment, and Tree Protection Planning
PREPARED FOR:
City of Renton Public Works
Attn. Debbie Boodell, Capital Project Coordinator
PREPARED BY:
Tyler Holladay, Consultant
ISA Certified Arborist® #PN-8100A
ISA Tree Risk Assessment Qualified
B.A. Urban Planning & Sustainable Development
GIS Specialist
REVIEWED BY:
Josh Hollinger, Field Consulting Arborist
ISA Certified Arborist #WE-12135AU
ISA Tree Risk Assessment Qualified
October 8, 2024
RECEIVED
11/20/2024
AMorganroth
PLANNING DIVISION
Docusign Envelope ID: 771C088A-AD2F-443F-9D07-1EF19280E942
Urban Forestry Services | Bartlett Consulting ● Divisions of The F.A. Bartlett Tree Expert Company
15119 McLean Road, Mount Vernon, WA, 98273 ● 360.399.1377 ● www.urbanforestryservices.com
Urban Forestry Services | Bartlett Consulting ● Divisions of The F.A. Bartlett Tree Expert Company
15119 McLean Road, Mount Vernon, WA, 98273 ● 360.399.1377 ● www.urbanforestryservices.com
Tree Inventory, Assessment, and Tree Protection Planning
Renton Market and Piazza Improvement Project
Renton, Washington
October 8, 2024
Table of Contents
Summary ................................................................................................................................... 1
Introduction ................................................................................................................................ 3
Findings ..................................................................................................................................... 4
Risk and Impact Assessments ................................................................................................ 4
Risk Assessment .................................................................................................................... 6
Construction Impact Assessment ........................................................................................... 9
Recommendations ....................................................................................................................19
Literature Cited .........................................................................................................................23
Attachments:
ISA Level 2 Tree Assessment Matrix
Tree Assessment and Protection Site Plans TA-01 – TA-06
General Tree Protection Guidelines
Tree Preservation Zone (TPZ) Explanation
Tree Risk Assessment Vocabulary
Terms and Conditions
Urban Forestry Services | Bartlett Consulting ● Divisions of The F.A. Bartlett Tree Expert Company
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[Subject]
Urban Forestry Services | Bartlett Consulting ● Divisions of The F.A. Bartlett Tree Expert Company
15119 McLean Road, Mount Vernon, WA, 98273 ● 360.399.1377 ● www.urbanforestryservices.com
Urban Forestry Services | Bartlett Consulting ● Divisions of The F.A. Bartlett Tree Expert Company
15119 McLean Road, Mount Vernon, WA, 98273 ● 360.399.1377 ● www.urbanforestryservices.com
Renton Market and Piazza Improvement Project ● Tree Risk and Construction Impact Assessment, and Tree Protection Guidance
October 8, 2024 ● Page 1
Urban Forestry Services | Bartlett Consulting ● Divisions of The F.A. Bartlett Tree Expert Company
15119 McLean Road, Mount Vernon, WA, 98273 ● 360.399.1377 ● www.urbanforestryservices.com
Executive Summary
I inventoried and assessed 60 trees on and surrounding the Renton Market and Piazza
Improvement Project site in Renton, Washington, on September 13, 2024.
Regulatory status
Per definitions outlined in the City of Renton Code (RMC 4-11-200 Definitions ‘T’), the
regulatory designations of these trees are as follows:
Table 1. regulatory designations summary
Removal and Retention
I recommend the removal of 16 trees either to mitigate an unacceptable level of risk or poor
health, or because construction impacts appear to be direct or severe to an unsustainable
degree based on the plans provided. The regulatory designations of the 16 trees are as follows:
Table 2. Removal tree regulatory designations summary
The remaining 44 trees can be retained with various forms of protection and preservation
before, during, and after construction.
Risk Assessment
i Landmark Tree: “A tree with a caliper of twenty-four inches (24") or greater, except for big leaf maples,
black cottonwoods, and red alder trees, which qualify as landmark trees with a caliper of thirty inches
(30") or greater.”
ii Significant Tree: “A tree with a caliper of at least six inches (6"), except alder or cottonwood trees, which
qualify as significant trees with a caliper of eight inches (8") or greater. Trees certified as high-risk shall
not be considered significant.”
RMC Designation Count Details
Landmark i 0
Significant ii 50
Not Significant 10 Nine (9) trees do not meet significant size thresholds, and one (1) is not
considered significant due to the high risk it poses to surrounding targets.
Total 60
RMC Designation Count Details
Significant 9
Not Significant 7 Six (6) trees do not meet significant size thresholds, and one (1) is not
considered significant due to the high risk it poses to surrounding targets.
Total 16
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The timeframe for this assessment is three (3) years.
All inventoried trees were assessed using ISA Level 2 Basic Risk Assessment methods. The
distribution of risk ratings as determined through these methods are as follows.
Table 3. Risk rating summary
Continued monitoring and reassessment within 3 years, or after construction has concluded
(whichever comes first), is recommended for all trees that will be retained and protected as part
of the project.
Construction Impact Evaluation
Relying on the listed preliminary data sources below, I expect a mostly polarized range of
impacts to trees within and surrounding the project areas; trees are likely to either experience
Direct severe impacts – 23 trees – or little to no impact – 30 trees – to their critical root systems.
I have evaluated seven (7) trees as likely to experience Minor impacts due to potential above-
ground building clearance conflicts with tree branches, which will likely require pruning.
• Architectural site plans provided by Graham Baba Architects (09-10/24)
• Landscape plans provided by Hewitt (09-10/24)
• Field observations and data from my inventory and assessment fieldwork (09/13/24)
Table 4. Impact Classification Summary iii
Impact Class Protect Remove Total
Direct 9 iv 14 23
Major 0 0 0
Minor 7 0 7
Negligible 0 0 0
None expected 28 2 v 30
Totals 44 16 60
iii See the UFS|BC Tree Protection Zone Impact Analysis section for definitions and more details.
iv Nine trees are directly within landscape areas that are planned for renovation. These trees can be
preserved with our recommended guidance if desired; otherwise, removal is advised.
v One tree is recommended for removal due to high risk and another due to poor health
ISA Level 2 Risk Rating Count Risk Management Recommendations
Low 57 Continued monitoring
Moderate 2 Reduction pruning
High 1 Removal
Extreme 0
Total 60
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Introduction
As requested by Debbie Boodell, City of Renton Capital Project Coordinator, I conducted a tree
inventory, ISA Level 2 Basic Risk Assessment, and a preliminary construction impact
assessment for 60 trees growing within and immediately surrounding the boundaries of the
Renton Market and Piazza Improvement Project site. I conducted and completed my fieldwork
on September 13, 2024.
The purpose of my engagement is to provide technical and professional arboricultural support to
the City and the two primary contractors engaged in this project – Hewitt and Graham Baba.
The function of the requested support is to fulfill the project’s tree assessment and tree
protection requirements as they relate to permitting and to ensure the subject trees are
managed and protected according to the City’s Tree Retention And Land Clearing Regulations
(RMC 4-4-130) and industry best practices.
Based on pre-engagement correspondence with the project team (Hewitt, Graham Baba and
the City of Renton), and a thorough review of the various provided plans, site improvements will
generally include, but are not limited to:
• Architectural: Interior and exterior renovations to the existing “Market” structure, with
minimal changes to the overall size and footprint.
• Landscape: renovations and changes to the existing “Piazza Park,” including select
landscape beds, surfaces/hardscaping, and other park elements (lighting, seating, etc.).
These improvements present varying degrees of potential impacts to existing trees throughout
the project site. Most significant are the planned changes to the park and to the south entrance
of the Market building. These areas will include varying degrees of tree root zone changes and
disturbance to demolish and construct new surfaces and planting beds and will require some
trees to be removed.
Through my findings and recommendations that follow, I feel the City and its primary project
contractors will have the information and guidance they need to effectively protect and manage
the site’s living assets in the lead-up to, during, and after construction. I believe that attention
and adherence to my recommendations and protection guidelines, as well as continued
engagement with my consultancy throughout the life of the project, will ensure that the important
social, environmental, and economic benefits that these trees can offer the community of
Renton are maximized to their fullest potential.
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Findings
An ISA Level 2 Tree Assessment Matrix with photos and detailed information on each of the
trees included in this inventory and assessment is attached. Tree Inventory, Assessment, and
Tree Protection Site Plans (TA-01 – TA-06) are also attached and show the locations of each of
the assessed trees, as well as tree protection planning analysis and recommended treatments.
Site Summary
The project site is located within Renton’s Downtown Business District and Civic Core Area. The
site is a large city block consisting of a public park (Piazza Park) throughout the south half and a
Market building within the northern half. At the north end of the block is the City of Renton’s
Transit Center.
The site is relatively densely treed with ROW street trees throughout the perimeter. The interior
of the site is less densely treed, though there is significant canopy present within the park and
near the south side of the Market building.
Inventory and Assessment
In total, I actively recorded and visually assessed 60 trees in the field. Each tree received an
aluminum numerical identification tag which was nailed to the trunk.
Tree inventory areas were defined before my fieldwork through the contract and pre-fieldwork
correspondence with the project team. The executed agreement from August 2024 defines trees
for inclusion as “Trees with a trunk diameter (measured at 54 inches) greater than 4 inches
located within the specified landscape and /public rights-of-way...” (Contract ‘Exhibit A’ Map
shown below). The only change to this scope is the exclusion of the Gateway Park property,
west of Loagan Ave. S.; we received direct direction from Debbie Boodell to not include this
area, as it is no longer part of the scope of the project.
Figure 1. Contract ‘Exhibit A’.
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Regulated Trees
Fifty (50) trees meet the size and species thresholds that classify them as Significant according
to definitions outlined in the City of Renton Code (RMC 4-11-200 Definitions ‘T’). Ten (10) trees
do not meet the code’s definition – nine (9) of these have trunk diameters that measure less
than 6 inches, and one (1) was found to be a high risk, thus disqualifying it from being
significant. No Landmark trees exist in the population.
Table 2. regulatory designations summary
Species
The tree species distribution for the inventory and assessment population is relatively diverse
despite the fact that the population is almost completely comprised of broadleaf species and is
weighted toward red maple street tree cultivars along the perimeter. The site’s interior is
adorned by mature honey locust, and young and semimature scatterings of katsura,
serviceberry and vine maple. Outside of the perimeter in the nearby median planter to the east
is a row of maturing green ash trees.
Table 5. Species Distribution Summary
Species Count
Red maple (Acer rubrum) 24
Honeylocust (Gleditsia triacanthos) 11
Western serviceberry (Amelanchier alnifolia) 7
Green ash (Fraxinus pennsylvanica) 6
Vine maple (Acer circinatum) 5
Katsura (Cercidiphyllum japonicum) 3
Strawberry tree (Arbutus unedo) 2
Colorado spruce (Picea pungens) 1
Flowering dogwood (Cornus florida) 1
Total 60
RMC Designation Count Details
Landmark 0
Significant 50
Not Significant 10 Nine (9) trees do not meet significant size thresholds, and one (1) is not
considered significant due to the high risk it poses to surrounding targets.
Total 60
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Age Class
The relative tree age vi distribution throughout the assessment population is mainly dominated by
mature trees at 88% of the population. Young and semimature trees comprise 12% of the
population.
Condition
The overall conditionvii of the trees is fair, with 66% in fair condition, 27% in good condition, 7%
in poor condition.
Risk Assessment
An ISA Level 2 Assessment Matrix with photos and detailed information on each of the
inventoried and assessed trees is attached.
I assessed all trees with trunk diameters greater than 4 inches throughout the defined inventory
and assessment areas using ISA Level 2 Basic Assessment methods. These trees and their
associated ISA Level 2 risk rating determinations are detailed in Table 4 below. Specifications
and more detailed information surrounding mitigation recommendations for these trees (if
warranted) are provided in the recommendations section.
Table 6. ISA Level 2 Risk Summary
vi Relative Tree age: young to semimature = less than 40% life expectancy; mature = 40% to 80% life
expectancy; old = greater than 80% life expectancy.
vii ‘Condition’ is based on the Guide for Plant Appraisal, 10th Edition, and determined using health,
structure, and form.
Level 2
Risk Rating General Rec. Code
Designation Count Tree ID Totals
Low
Retain Significant 39
1 2 3 4
5 6 7 18
22 23 24 25
26 27 29 30
31 32 36 40
41 42 43 44
45 46 48 49
50 51 52 53
54 55 56 57
58 59 60
42
57
Non-significant 3 17 19 21
Remove Significant 9 9 11 12 13
15 20 33 34
35 15
Non-significant 6 8 10 14 16
37 38
Moderate
Retain Significant 2 28 39 2
2 Non-significant 0
Remove Significant 0 0 Non-significant 0
High
Retain Significant 0 0
1 Non-significant 0
Remove Significant 0 1 Non-significant 1 47
Totals 60 60 60
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Only six (6) trees – 4, 11, 26, 28, 39 and 47 – contained parts or defects that I found
concerning. These parts of concern generally included codominant stems or branches with
included bark at their unions and larger branches that appeared overextended in horizontal
length.
The targets I considered during this assessment mostly included pedestrians, parked vehicles
and buses, and transit station infrastructure. I also considered other targets such as roadway
use and future improvements and infrastructure.
Occupancy rates for these targets were considered in the context of current and future use. I
evaluated the pedestrian and vehicular target occupancy rates as frequent, given the busy ebb
and flow of the transit station and regular pedestrian use throughout the park. Transit station
infrastructure and permanent facilities were evaluated as constant occupancy.
Despite the risk ratings being Low for 95% of the assessed trees, I nevertheless recommend
that these trees be continually monitored and reassessed regularly, per the guidance in our
recommendation section.
The timeframe for this assessment is three (3) years. Continued monitoring and reassessment
within three (3) years (September 2027), or immediately after construction (whichever comes
first) is recommended for all trees that will be retained as part of the project.
Risk Assessment Limitations
Assignment
My ground-based visual risk assessment of the trees throughout the park is based on one (1)
site visit on September 13, 2024.
My assignment, as proposed in the executed agreement from August 2024, defines trees for
inclusion as “Trees with a trunk diameter (measured at 54 inches) greater than 4 inches located
within the specified landscape and /or public rights-of-way...” (Contract ‘Exhibit A’ Map shown
above in Figure 1).
I assessed each tree using ISA Level 2 methods from the ground and from all reasonably
accessible angles. My assessment was limited to visible and accessible portions of the root
collar and canopy. Vegetation or other material covering the ground and tree parts, such as
English ivy, etc., may be obstructing significant defects from view.
All photographs, samples, and readings, if applicable, were taken at the time the assessment
was performed.
Tree Risk Assessments
It is important for the City of Renton to know and understand, as the owner and manager of
these trees, that all trees pose some degree of risk from failure or other conditions.
The information and recommendations within this report have been derived from the level of tree
risk assessment identified above, using the information and practices outlined in the International
Society of Arboriculture’s Best Management Practices for Tree Risk Assessment and American
National Standards Institute A300 Tree Risk Assessment Standard, as well as the information
available at the time of the inspection. However, the overall tree risk rating, the mitigation
recommendations, or any other conclusions do not preclude the possibility of failure from
undetected conditions, weather events, or other acts of man or nature. Trees can fail
unpredictably, even if no defects or other conditions are present. Tree failure can also cause
adjacent trees to fail, resulting in a “domino effect” that impacts targets outside the foreseeable
target zone of this tree. It is the responsibility of the tree owner or manager to schedule repeat
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or advanced assessments, determine actions, and implement follow-up recommendations,
monitoring, and/or mitigation.
Bartlett Tree Experts can make no warranty or guarantee whatsoever regarding the safety of any
tree, trees, or parts of trees, regardless of the level of tree risk assessment provided, the risk
rating, or the residual risk rating after mitigation. The information in this report should not be
considered as making safety, legal, architectural, engineering, landscape architectural, land
surveying advice or other professional advice. This information is solely for the use of the tree
owner and manager to assist in the decision-making process regarding the management of their
tree or trees. Tree risk assessments are simply tools that should be used in conjunction with the
owner or tree manager’s knowledge, other information, and observations related to the specific
tree or trees discussed and sound decision-making.
Photo 1. Looking northwest, Tree 47 (circled in red) was found to be a high risk due to poor observed structural
elements. The tree is recommended for removal to mitigate the risk.
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Construction Impact Assessment
Introduction and Background
In reviewing the preliminary plans listed below and discussing the planned methods and extents
with the project team, the renovation and construction of the proposed Market building and
Piazza Park has the potential to be significantly impactful for all trees within and immediately
surrounding the site.
• Architectural site plans provided by Graham Baba Architects (09-10/24)
• Landscape plans provided by Hewitt (09-10/24)
• Field observations and data from my inventory and assessment fieldwork (09/13/24)
There are several primary considerations I weigh when analyzing impacts and determining
which trees can be effectively preserved and protected. These considerations generally include
long-term tree stability, health, structure, and form. Ultimately, a preserved tree must be able to
sustain and support itself and not be or become an unacceptable risk as a result of construction.
• Stability: each tree's protected and retained root system must be wide and deep enough
to hold the tree upright during and after construction during normal weather events.
• Health: The protected and retained root system and live branching of each tree must be
sufficient to provide adequate resources to maintain long-term health and vigor
considering the potential impacts.
• Structure and form: The balance and appearance of the crown of a tree becomes a
factor for consideration when trees are removed around retained trees or when trees
require pruning to provide clearance for buildings and other infrastructure. Exposed
interior trees can have asymmetrical crowns and low live-crown-ratios (LCR), which may
predispose them to windthrow or torsional failures in the future. This can also be the
case with trees that may require significant clearance pruning that creates an off-balance
crown. These interior and clearance-pruned trees can also be unsightly standing on their
own.
The Tree Protection Zone analysis that follows attempts to compare and contrast various
interrelated species, morphological, behavioral, dimensional, and spatial variables that we
understand are indicators of whether a tree can or should be recommended for preservation.
These interrelated variables are applied through a lens of the considerations listed above - long-
term tree stability, health, structure, and form.
Given our understanding of the City’s strong desire to retain and protect trees greater than or
equal to 6 inches DBH, we have given careful and diligent attention to the impact analysis and
protection recommendations that follow. All tree protection measures herein will require close
communication and monitoring with our team before, during, and after construction to ensure
that protection is successful.
City of Renton Tree Protection Standards
The City of Renton generally prohibits construction activities within the dripline of trees planned
for retention (RMC 4-4-130.H.10). While valuable for generalized impact evaluation purposes
due to simplicity, the use of a tree’s drip line in impact evaluation is relatively limited when more
precise evaluations are needed in dense built environments, and when maximizing tree
retention is desired. Nearly all of the trees I evaluated have driplines that overlap some aspect
of significant change related to this project or reside directly within the work limits. As such, we
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have employed more precise impact assessment methods to evaluate the anticipated degree of
potential impacts, a tree’s expected tolerance of anticipated impacts, and what, if any,
alternative mitigation options may be utilized to allow more trees to be retained.
The following impact analysis is provided to give a more comprehensive picture of what impacts
trees could potentially experience and how trees may respond to these anticipated impacts
using methods outlined in current industry standards covering the management of trees during
site development and construction. The following methodology incorporates multiple interrelated
factors – species, size, age, condition, species construction tolerance, risk, percent Calculated
Tree Protection Zone (CTPZ) impact, etc. – to determine which trees are suitable for
preservation, the degree of impact a tree has the potential to incur, and where tree protection
efforts need to be spatially and organizationally focused throughout the project.
UFS|BC Tree Protection Zone (TPZ) Analysis
See the attached Tree Inventory, Assessment, and Tree Protection Site Plans and Matrix for
details of this analysis and related protective measures.
All 60 inventoried and assessed trees were evaluated for potential impacts using the provided
preliminary plans. The species, dimensional, and condition metrics for each tree were evaluated
and documented and then applied to the TPZ analysis outlined below.
Construction Toleranceviii
Of the tree species in the population, only one (1) tree, a flowering dogwood (Cornus florida), is
known to have a low tolerance for construction impacts.
The remaining species in the population tend to be more tolerant of construction impacts, with
48% moderately tolerant and 50% highly tolerant. Medium tolerance trees include Colorado
spruce, honey locust, katsura, strawberry tree, vine maple, and serviceberry. High-tolerance
trees include green ash and red maple.
Suitability for preservation ix
When factoring in the condition, relative age, size, and species tolerance to impacts for
inventoried trees, as detailed above and in our various findings sections, the population's
suitability for preservation includes a full range:
High – 36 trees (60%)
Medium – 19 trees (31%)
Low – 4 trees (7%)
Very low – 1 tree (2%)
The tree with Very low suitability for preservation is classified as such due to its poor condition
and High risk-rating. The trees with Low suitability for preservation are those that tend to exhibit
less than optimal health and are known to have a lower tolerance for impacts.
viii Species tolerance to construction is determined through a combination of personal professional
experience and regional tree industry reference materials. This is species specific and treated in isolation,
it is not based on tree condition or risk or proposed plans or anticipated impacts to a tree.
ix Suitability for preservation is a categorization of a tree’s potential to remain an asset following
development, irrespective of construction plans or anticipated impacts.
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Impact classification
Trees classified as impacted in this assessment are those that will experience impacts, direct or
indirect, to their Calculated Tree Protection Zone (CTPZ) based on the aforementioned
preliminary plans provided by Hewitt and Graham Baba. Impacts are classified in the following
ways:
Table 7. Impact classification definitions
Impact Class Definition
DIRECT A tree resides directly within the planned areas of change and/or greater than
50% of a tree's CTPZ and/or canopy is expected to incur loss.
MAJOR A tree resides outside the planned areas of change, but a large portion
(20%<50%) of the tree's CTPZ and/or canopy is expected to incur loss.
MINOR A tree resides outside of the planned areas of change, and a small portion
(5%<20%) of the tree's CTPZ and/or canopy is expected to incur loss.
NEGLIGIBLE A tree resides outside of the planned areas of change to the degree that
less than 5% of the tree's CTPZ and/or canopy is expected to incur loss.
NONE EXPECTED A tree resides outside of the planned areas of change to the degree that no
impacts are expected within the tree's CTPZ.
Through remote spatial analysis using measurements I collected in the field, planned
improvements were evaluated against each tree's CTPZ. Combining this analysis with our
observational and categorical findings, we identified specific trees as potential candidates for
removal or retention and protection.
Impacted trees
Twenty-three (23) trees are expected to incur some form of Direct impact. Some direct impacts
are related to changes in hard surfacing, and others are related to landscape changes to the
existing planting space. Of these trees:
• Fourteen (14) are expected to incur direct, unavoidable, and unsustainable impacts due
to hard surface changes and construction and will require removal.
• Nine (9) will incur direct impacts through landscape planting space changes (grubbing)
as currently proposed; however, I believe preservation is possible, contingent that these
impacts are minimized through the alternative approaches outlined in the
recommendations section below.
Seven (7) trees are expected to incur Minor impacts. These trees are mostly expected to
experience above-ground impacts related to pruning their branches/canopy to provide clearance
for workers and equipment during construction. All of these trees can be effectively protected
and preserved during and after construction, contingent upon my protection guidance outlined
below.
Non-impacted trees
Thirty (30) trees are not expected to be impacted by construction. While many of these trees
certainly reside close to planned improvements, potential impacts to above and below-ground
tree parts appear to be mostly avoided due to either:
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• Branches not appearing to present potential conflicts with construction or future use;
and/or,
• Critical roots are naturally protected due to existing surrounding hard surfacing
remaining in place and unchanged.
Of these trees, I recommend that 28 be preserved and protected. Two (2) are recommended for
removal for reasons other than impacts – risk and health. Despite no impacts being expected for
these trees, these non-impacted trees should still be protected per the attached UFS|BC
General Tree Protection Guidelines to ensure that they do not incur any unplanned above or
below-ground damage.
Construction Impact Assessment Limitations
Assignment
My remote and visual ground-based construction impact assessments of the trees within and
surrounding the project work limits are based on preliminary plans provided by Graham Baba
Architects and Hewitt, as well as data I collected in the field on September 13, 2024.
My assignment, as detailed in our August 2024 agreement, was to complete a construction
impact assessment of trees within and bordering the project improvement areas and to identify
trees requiring work, i.e., additional tree removal or special tree protection measures. Impact
assessment methods are detailed in our findings above.
All photographs, samples, and readings, if applicable, were taken at the time the assessments
were performed. The assessment is limited to visible and accessible portions of the root collar
and canopy; vegetation covering the ground and tree parts, such as English ivy, etc., may be
obstructing significant defects from view.
Construction Tree Impact Assessments
It is important for the City of Renton to know and understand that trees are complex living
organisms that do not exist in isolation; trees grow and adapt within the above and below-
ground systems from which they live and with their surrounding living neighbors and non-living
features. As such, changes to tree parts/structures, growing environments, and surrounding
infrastructure can have unpredictable outcomes, negative and positive.
The information and recommendations within this report have been derived from the levels of
impact analysis identified above, using the information and practices outlined in the International
Society of Arboriculture’s Best Management Practices for Managing Trees During Site
Development and Construction and American National Standards Institute A300 Part 5:
Management of Trees and Shrubs During Site Planning, Site Development, and Construction
Standard, as well as industry related impact assessment information available at the time of our
inspection.
Removal and preservation determinations derived from this impact analysis, or any other impact-
related conclusions do not preclude the possibility of failure, decline, or death from undetected
conditions, weather events, or other acts of man or nature. Trees can unpredictably fail, decline,
or die even if no defects or other conditions are present and even when all best efforts are made
to mitigate or prevent potential impacts.
Renton Market and Piazza Improvement Project ● Tree Risk and Construction Impact Assessment, and Tree Protection Guidance
October 8, 2024 ● Page 13
Urban Forestry Services | Bartlett Consulting ● Divisions of The F.A. Bartlett Tree Expert Company
15119 McLean Road, Mount Vernon, WA, 98273 ● 360.399.1377 ● www.urbanforestryservices.com
It is the responsibility of the tree owner or manager to schedule repeat or advanced
assessments, determine actions, and implement follow-up recommendations, monitoring and/or
mitigation.
Bartlett Tree Experts can make no warranty or guarantee whatsoever regarding the safety or
long-term viability of any tree, trees, or parts of trees, regardless of the level of impact
assessment provided, protective treatments, the risk rating, or the residual risk rating after
mitigation. The information in this report should not be considered as making safety, legal,
architectural, engineering, landscape architectural, land surveying advice or other professional
advice. This information is solely for the use of the tree owner and manager to assist in the
decision-making process regarding the management of their tree or trees. Construction tree
impact assessments are simply tools that should be used in conjunction with the owner or tree
manager’s knowledge, other information and observations related to the specific tree or trees
discussed and sound decision-making.
Photo 2. Looking east, this photo shows areas of the existing Market building and Piazza Park. Much of the surfacing
shown will remain unchanged, which will provide protection to roots during construction. More concerning in the area
shown is potential impacts to tree trunks and branches.
Renton Market and Piazza Improvement Project ● Tree Risk and Construction Impact Assessment, and Tree Protection Guidance
October 8, 2024 ● Page 14
Urban Forestry Services | Bartlett Consulting ● Divisions of The F.A. Bartlett Tree Expert Company
15119 McLean Road, Mount Vernon, WA, 98273 ● 360.399.1377 ● www.urbanforestryservices.com
Renton Market and Piazza Improvement Project ● Tree Risk and Construction Impact Assessment, and Tree Protection Guidance October 8, 2024 ● Page 15
Urban Forestry Services | Bartlett Consulting ● Divisions of The F.A. Bartlett Tree Expert Company
15119 McLean Road, Mount Vernon, WA, 98273 ● 360.399.1377 ● www.urbanforestryservices.com
Table 8. Impact classification summary
Impact
Class Action Code
Designation Count Tree ID Totals
Direct
Protect Significant 6 7 18 25 26 30 31 9
23 Non-significant 3 17 19 21
Remove Significant 9 9 11 12 13 15 20 33 34 35 14 Non-significant 5 8 10 14 16 37
Major
Protect Significant 0 0
0 Non-significant 0
Remove Significant 0 0 Non-significant 0
Minor
Protect Significant 7 27 28 29 39 52 53 54 7
7 Non-significant 0
Remove Significant 0 0 Non-significant 0
Negligible
Protect Significant 0 0
0 Non-significant 0
Remove Significant 0 0 Non-significant 0
None
expected
Protect Significant 28 1 2 3 4 5 6 22 23 24 32 36
40 41 42 43 44 45 46 48 49 50 51
55 56 57 58 59 60 28
30 Non-significant 0
Remove Significant 0 2 Non-significant 2 38 47
Totals 60 60 60
Renton Market and Piazza Improvement Project ● Tree Risk and Construction Impact Assessment, and Tree Protection Guidance October 8, 2024 ● Page 16
Urban Forestry Services | Bartlett Consulting ● Divisions of The F.A. Bartlett Tree Expert Company
15119 McLean Road, Mount Vernon, WA, 98273 ● 360.399.1377 ● www.urbanforestryservices.com
Urban Forestry Services | Bartlett Consulting ● Divisions of The F.A. Bartlett Tree Expert Company
15119 McLean Road, Mount Vernon, WA, 98273 ● 360.399.1377 ● www.urbanforestryservices.com
Renton Market and Piazza Improvement Project ● Tree Risk and Construction Impact Assessment, and Tree Protection Guidance
October 8, 2024 ● Page 18
Urban Forestry Services | Bartlett Consulting ● Divisions of The F.A. Bartlett Tree Expert Company
15119 McLean Road, Mount Vernon, WA, 98273 ● 360.399.1377 ● www.urbanforestryservices.com
Renton Market and Piazza Improvement Project ● Tree Risk and Construction Impact Assessment, and Tree Protection Guidance
October 8, 2024 ● Page 19
Urban Forestry Services | Bartlett Consulting ● Divisions of The F.A. Bartlett Tree Expert Company
15119 McLean Road, Mount Vernon, WA, 98273 ● 360.399.1377 ● www.urbanforestryservices.com
Recommendations
Tree Removal: 16 trees
The following trees are recommended for removal either because of unsustainable construction
impacts, unacceptable risk, or because a trees poor condition warrants its removal and
replacement. See the risk assessment and construction impact section in our findings above for
specific removal rationales.
Table 9. Tree removal summary
Code Designation Count Tree ID
Significant 9 9 11 12 13 15 20 33 34 35
Non-significant 7 8 10 14 16 37 38 47
Totals 16
Removal guidance:
a. See section 3 of the GTPG for reference.
b. Tree removal shall be done in a manner that does not damage above and below-ground
parts of retained and protected trees.
c. Where possible, cut stumps low to the ground and leave the root mass in place. If stump
or root extraction is required, take care not to pull, pluck, or tear the roots of surrounding
trees that are identified for retention and protection.
d. All removal activities shall adhere to ANSI Z133 Safety Standards.
e. UFS|BC can provide recommended service providers for this work upon request.
Tree Preservation and Protection: 44 trees
The following trees within and surrounding the planned project improvements may be retained
during and after construction, contingent on the careful implementation of the attached UFS|BC
General Tree Protection Guidelines (GTPG), completion of specified risk mitigation treatments,
and continued monitoring.
Table 10. Protected tree summary
Code Designation Count Tree ID
Significant 41
1 2 3 4 5 6 7 18
22 23 24 25 26 27 28 29
30 31 32 36 39 40 41 42
43 44 45 46 48 49 50 51
52 53 54 55 56 57 58 59
60
Non-significant 3 17 19 21
Total 44
Renton Market and Piazza Improvement Project ● Tree Risk and Construction Impact Assessment, and Tree Protection Guidance
October 8, 2024 ● Page 20
Urban Forestry Services | Bartlett Consulting ● Divisions of The F.A. Bartlett Tree Expert Company
15119 McLean Road, Mount Vernon, WA, 98273 ● 360.399.1377 ● www.urbanforestryservices.com
Tree Protection Guidance:
UFS|BC General Tree Protection Guidelines (GTPG) with Tree Protection Zone Explanation:
Our consultancy’s tree protection guidelines are attached. These guidelines generally align with
the City’s requirements and go beyond what is required in ways that we feel provide more
adequate, effective, and flexible protection.
Tree Protection Timing and Phasing: While our attached guidelines outline specific tree
protection treatments and some general timing/phasing guidance, the instructions and timing
considerations below should supplement the guidelines.
1. Pre-construction: activities and installation to occur before the site is accessed by
equipment or materials are staged.
a. Install all tree protection fencing in alignment with the attached General Tree Protection
Guidelines and Tree Protection Site Plans – TA-05 – TA-06.
i. See sections 1, 2, 4, 5, 6, and 10 of the GTPG for reference.
b. Prune trees as needed for anticipated clearances and risk mitigation.
i. All pruning work must be guided by a qualified arborist following the pruning
recommendations and thresholds below.
2. Site Preparation: recommended actions to improve retained tree growing conditions.
a. If possible, chip wood from removed or pruned trees on site and spread the chips
throughout the tree protection zones during site preparations.
i. See sections 2, 3, and 11 of the GTPG for reference.
ii. Wood chip mulch around trees that have or may experience root impacts from
construction is beneficial for their long-term health; it closely matches where tree
roots grow in a natural environment, and it is supportive of soil health and fine root
growth.
iii. Note: do not import or use fine bark mulch. Fine bark mulch does not provide the
same benefits as wood chips, and in many instances, it becomes detrimental to
tree health as the waxy fibers compress and exclude water.
iv. Keep mulch 6 to 8 inches away from the base of trees to prevent burying root
collars
3. During Construction: activities and installation to occur after preconstruction treatments
have been applied and during construction. All applicable guidelines outlined in our GTPG
must be followed.
a. Specific sections of particularly high importance include sections 3, 13, 14, and 16.
b. All earthwork and tree removals within the areas identified for “handwork and arborist
monitoring only” must be completed by hand and with direct oversight from the project
arborist; no heavy equipment is to be used to dig within these areas to reduce the
severe impacts caused by extreme forces from digging machinery. Small mini
excavators or mini tracked equipment may be used only if approved by the project
arborist and with direct arborist oversight.
c. On-site monitoring by the project arborist (or another qualified arborist) during
earthwork activity within all tree protection zones of preserved trees is strongly
recommended, as a qualified arborist can provide direct guidance on ways to
approach discovered roots that minimize damage (i.e., proper cutting or preservation).
4. Post-Construction: activities to occur only after the project is complete, all materials and
equipment have been removed from the site, and no further construction activities are
expected.
Renton Market and Piazza Improvement Project ● Tree Risk and Construction Impact Assessment, and Tree Protection Guidance
October 8, 2024 ● Page 21
Urban Forestry Services | Bartlett Consulting ● Divisions of The F.A. Bartlett Tree Expert Company
15119 McLean Road, Mount Vernon, WA, 98273 ● 360.399.1377 ● www.urbanforestryservices.com
a. Specific sections of the GTPG that may apply include sections 17, 18 and 19.
b. Remove all tree protection fencing only after the project is complete.
The project arborist (or another qualified arborist) should complete a final site visit to report on
retained tree conditions following the completed work to identify if any further post-construction
treatments may be required. See our “Monitor and reassess all retained and protected trees”
recommendation below.
Pruning: 7 trees
Seven (7) trees recommended for retention with protection will likely require pruning for
construction clearance. I also recommend that two (2) of these trees receive reduction pruning
treatments to mitigate a moderate risk rating associated with potential overextended branch
failure.
Risk mitigation – 2 trees
a. This recommendation applies to trees 28 and 39.
b. Prune with the goal of mitigating the probable likelihood of branch failure for low-
hanging, long, overextended large branches.
c. Prune using a ‘natural system’ to reduce the length of long branches.
d. Do not remove more than 15% of the tree’s live foliage.
e. Do not top this tree or its branches. Reduction cuts should be made at viable lateral
branches.
f. Do not thin, “spiral prune,” or “wind sail” this tree.
g. Pruning work shall follow ANSI A300 pruning standards, ANSI Z-133 safety standards
and be completed by (or directly supervised by) an ISA Certified and Tree Risk
Assessment Qualified (TRAQ) Arborist.
h. UFS|BC can provide recommended service providers for this work upon request.
Clearance Pruning – 7 trees
a. The following trees may require clearance pruning, as identified during our impact
assessment and fieldwork – 27, 28, 29, 39, 52, 53, and 54.
b. Prune with the goal of providing building, equipment, and worker clearance from
branches on an as-needed basis.
c. Prune using a ‘natural system’ to either entirely remove a branch back to the branch
collar at the trunk or reduce a branch’s length by cutting it back to a viable lateral branch.
d. Do not remove more than 20% of a tree’s live foliage.
e. Do not top trees or leave branch stubs.
f. Pruning work shall follow ANSI A300 pruning standards and ANSI Z-133 safety
standards and be completed by (or directly supervised by) an ISA Certified and Tree
Risk Assessment Qualified (TRAQ) Arborist in coordination with the project contractor
requiring clearance.
EAB Preventative Treatment: 6 trees
Six (6) trees recommended for retention with protection, located within the street median east of
the site, are at risk of Emerald Ash Borer (EAB) (Agrilus planipennis) impacts. These trees
include 55, 56, 57, 58, 59 and 60. With recent confirmations of EAB in Vancouver, BC, in May
2024 and the less recent confirmation in northwest Oregon in 2022, we can assume the pest is
Renton Market and Piazza Improvement Project ● Tree Risk and Construction Impact Assessment, and Tree Protection Guidance
October 8, 2024 ● Page 22
Urban Forestry Services | Bartlett Consulting ● Divisions of The F.A. Bartlett Tree Expert Company
15119 McLean Road, Mount Vernon, WA, 98273 ● 360.399.1377 ● www.urbanforestryservices.com
in the greater Seattle region. UFS|BC is recommending that our clients preventatively manage
this significant pest. Early preventative treatments include soil-applied systemic pesticides that
may be easily applied by qualified and licensed applicators. If additional support is needed in
this regard, please reach out to us and we can help coordinate treatments with a qualified and
licensed IPM professional.
String light removal: 1 tree
Tree 30 contains string lights that have been installed by wrapping the lights around the trunk
and branches. These lights should be removed. The lights do not appear to be functioning and
appear damaged and ragged. Leaving these string lights installed has the potential to damage,
and potentially kill the tree as the tree grows and becomes constricted/girdled by the cable.
Monitor and reassess all retained and protected trees:
To ensure that retained and protected trees are adequately protected throughout construction
and to evaluate if physiological and structural conditions have changed over time, all
retained/protected trees are recommended for regular monitoring throughout construction. A
post-construction assessment is also recommended to determine if any additional treatments
are required to ensure the viability of the trees.
a. Regular monitoring and reassessment shall follow current ANSI A300 Tree Risk
Assessment Standards, and ANSI Z133.1 safety standard, and be performed by an ISA
Certified and Tree Risk Assessment Qualified (TRAQ) Arborist®.
Please let me know if you have any questions regarding the findings and recommendations
included in this report.
Tyler Holladay, Consultant
Email: tholladay@bartlett.com
Renton Market and Piazza Improvement Project ● Tree Risk and Construction Impact Assessment, and Tree Protection Guidance
October 8, 2024 ● Page 23
Urban Forestry Services | Bartlett Consulting ● Divisions of The F.A. Bartlett Tree Expert Company
15119 McLean Road, Mount Vernon, WA, 98273 ● 360.399.1377 ● www.urbanforestryservices.com
Literature Cited
ISA Tree Risk Assessment Manual, Dunster, L., Smiley, T., Matheny, N., and Lilly, S., 2013
International Society of Arboriculture
ISA Best Management Practice, Tree Risk Assessment, Smiley, T., Matheny, N., and Lilly,
S. 2001 International Society of Arboriculture.
Tree Risk Assessment in Urban Areas and Urban / Rural Interface, Dunster, J. 2009 Pacific
Northwest Chapter, International Society of Arboriculture.
Managing Trees During Construction Best Management Practices., Third Edition., Fite K,
Smiley ET. 2023. International Society of Arboriculture.
Trees and Development: A Technical Guide to Preservation of Trees During Land
Development., Matheny N, Clark J. 1998. International Society of Arboriculture
Renton Market and Piazza Improvement Project ● Tree Risk and Construction Impact Assessment, and Tree Protection Guidance
October 8, 2024 ● Page 24
Urban Forestry Services | Bartlett Consulting ● Divisions of The F.A. Bartlett Tree Expert Company
15119 McLean Road, Mount Vernon, WA, 98273 ● 360.399.1377 ● www.urbanforestryservices.com
October 8, 2024
Tree Assessment Matrix
Renton Market and Piazza Improvement Project
Renton, Washnington
ARBORIST:
Tyler Holladay
ISA Certified Arborist® #PN-8100A,
ISA Tree Risk Assessment Qualified
Satellite Office:
19331 21st Avenue West
Lynnwood, WA 98036
1 (206) 367-4048
Main Office:
15119 McLean Road
Mount Vernon, WA 98273
1 (360) 428-5810
www.urbanforestryservices.com
UFS|BC ● City of Renton Market/Piazza Project ● ISA Level 2 Basic Assessment Matrix October 08, 2024
Tree ID:Dripline Ave. (r)Species:Red maple (Acer rubrum)Height15 inDBH/QMD:135 ft 15 ftStems:1Risk Assessment Summary
Risk Assessment ComponentsRisk Rating: Low
Target(s):Assessment Time Frame: 3 years
This document has been
prepared specifically for the
above-named project and is
likely part of a larger set of
data. This sheet should be
used in conjunction with the
written report and should not
be used without the approval
and participation of the F.A.
Bartlett Tree Expert Company.
Residual Risk (see recommendations):
Tree Parts(s) of Concern: None
Condition Rating:Fair (66%)
ConsequencesLikelihood of Failure Likelihood of ImpactHealthStructureForm
Good Fair Fair
Recommendations: Retain with protection.Notes: This tree is growing in a 5 x 5’ planting pit. Surface roots are present. Damage to
roots is apparent. Sidewalk displacement is occurring surrounding the planting pit.
Page 1 of 60
UFS|BC ● City of Renton Market/Piazza Project ● ISA Level 2 Basic Assessment Matrix October 08, 2024
Tree ID:Dripline Ave. (r)Species:Red maple (Acer rubrum)Height12.3 inDBH/QMD:235 ft 15 ftStems:1Risk Assessment Summary
Risk Assessment ComponentsRisk Rating: Low
Target(s):Assessment Time Frame: 3 years
This document has been
prepared specifically for the
above-named project and is
likely part of a larger set of
data. This sheet should be
used in conjunction with the
written report and should not
be used without the approval
and participation of the F.A.
Bartlett Tree Expert Company.
Residual Risk (see recommendations):
Tree Parts(s) of Concern: None
Condition Rating:Fair (66%)
ConsequencesLikelihood of Failure Likelihood of ImpactHealthStructureForm
Good Fair Fair
Recommendations: Retain with protection.Notes: This tree is growing in a 5 x 5’ planting pit. Surface roots are present. Damage to
roots is apparent. There is damage on the lower trunk.
Page 2 of 60
UFS|BC ● City of Renton Market/Piazza Project ● ISA Level 2 Basic Assessment Matrix October 08, 2024
Tree ID:Dripline Ave. (r)Species:Red maple (Acer rubrum)Height11.3 inDBH/QMD:335 ft 15 ftStems:1Risk Assessment Summary
Risk Assessment ComponentsRisk Rating: Low
Target(s):Assessment Time Frame: 3 years
This document has been
prepared specifically for the
above-named project and is
likely part of a larger set of
data. This sheet should be
used in conjunction with the
written report and should not
be used without the approval
and participation of the F.A.
Bartlett Tree Expert Company.
Residual Risk (see recommendations):
Tree Parts(s) of Concern: None
Condition Rating:Fair (60%)
ConsequencesLikelihood of Failure Likelihood of ImpactHealthStructureForm
Fair Fair Fair
Recommendations: Retain with protection.Notes: This tree is growing in a 5 x 5’ planting pit. Surface roots are present. Damage to
roots is apparent. There is minor pavement displacement surrounding planting pit.
Page 3 of 60
UFS|BC ● City of Renton Market/Piazza Project ● ISA Level 2 Basic Assessment Matrix October 08, 2024
Tree ID:Dripline Ave. (r)Species:Red maple (Acer rubrum)Height10.4 inDBH/QMD:435 ft 15 ftStems:1Risk Assessment Summary
Risk Assessment ComponentsRisk Rating: Low
Target(s): Parked vehiclesAssessment Time Frame: 3 years
This document has been
prepared specifically for the
above-named project and is
likely part of a larger set of
data. This sheet should be
used in conjunction with the
written report and should not
be used without the approval
and participation of the F.A.
Bartlett Tree Expert Company.
Residual Risk (see recommendations):
Tree Parts(s) of Concern: Southmost codominant stem
Condition Rating:Fair (53%)
ConsequencesLikelihood of Failure Likelihood of ImpactHealthStructureForm
Fair Possible SignificantPoorMediumFair
Recommendations: Retain with protection.Notes: This tree is growing in a 5 x 5’ planting pit. This tree has two codominant stems with
included bark at their unions that may be prone to failure. the planting pit great is beginning to
contact the trunk of the tree. There is an old pruning injury at around 6 feet that contains
decay. There is minor pavement displacement surrounding planting pit.
Page 4 of 60
UFS|BC ● City of Renton Market/Piazza Project ● ISA Level 2 Basic Assessment Matrix October 08, 2024
Tree ID:Dripline Ave. (r)Species:Red maple (Acer rubrum)Height8.6 inDBH/QMD:535 ft 12 ftStems:1Risk Assessment Summary
Risk Assessment ComponentsRisk Rating: Low
Target(s):Assessment Time Frame: 3 years
This document has been
prepared specifically for the
above-named project and is
likely part of a larger set of
data. This sheet should be
used in conjunction with the
written report and should not
be used without the approval
and participation of the F.A.
Bartlett Tree Expert Company.
Residual Risk (see recommendations):
Tree Parts(s) of Concern: None
Condition Rating:Fair (60%)
ConsequencesLikelihood of Failure Likelihood of ImpactHealthStructureForm
Fair Fair Fair
Recommendations: Retain with protection.Notes: This tree is growing in a 5 x 5’ planting pit. The canopy of this tree is crowded. There’s
an old pruning injury on the lower trunk at around 6 feet that contains decay. The planting pit
great is beginning to contact the lower trunk. Significant pavement uplift is occurring to the
north of this tree. Signs of Concrete grinding are apparent to correct the uplift.
Page 5 of 60
UFS|BC ● City of Renton Market/Piazza Project ● ISA Level 2 Basic Assessment Matrix October 08, 2024
Tree ID:Dripline Ave. (r)Species:Red maple (Acer rubrum)Height12.3 inDBH/QMD:635 ft 15 ftStems:1Risk Assessment Summary
Risk Assessment ComponentsRisk Rating: Low
Target(s):Assessment Time Frame: 3 years
This document has been
prepared specifically for the
above-named project and is
likely part of a larger set of
data. This sheet should be
used in conjunction with the
written report and should not
be used without the approval
and participation of the F.A.
Bartlett Tree Expert Company.
Residual Risk (see recommendations):
Tree Parts(s) of Concern: None
Condition Rating:Fair (66%)
ConsequencesLikelihood of Failure Likelihood of ImpactHealthStructureForm
Good Fair Fair
Recommendations: Retain with protection.Notes: This tree is growing in a 5 x 5’ planting pit. There is a trunk injury at around 8 feet on
the west side of the trunk. The planting pit great is about to contact the lower trunk.
Page 6 of 60
UFS|BC ● City of Renton Market/Piazza Project ● ISA Level 2 Basic Assessment Matrix October 08, 2024
Tree ID:Dripline Ave. (r)Species:Western serviceberry (Amelanchier alnifolia)Height8.2 inDBH/QMD:714 ft 12 ftStems:4Risk Assessment Summary
Risk Assessment ComponentsRisk Rating: Low
Target(s):Assessment Time Frame: 3 years
This document has been
prepared specifically for the
above-named project and is
likely part of a larger set of
data. This sheet should be
used in conjunction with the
written report and should not
be used without the approval
and participation of the F.A.
Bartlett Tree Expert Company.
Residual Risk (see recommendations):
Tree Parts(s) of Concern: None
Condition Rating:Good (80%)
ConsequencesLikelihood of Failure Likelihood of ImpactHealthStructureForm
Good Good Good
Recommendations: Retain with protection.Notes: This tree is not shown on the provided survey/site plans. The tree has a buried root
collar. Clarence pruning may be required during construction.
Page 7 of 60
UFS|BC ● City of Renton Market/Piazza Project ● ISA Level 2 Basic Assessment Matrix October 08, 2024
Tree ID:Dripline Ave. (r)Species:Western serviceberry (Amelanchier alnifolia)Height4.6 inDBH/QMD:810 ft 10 ftStems:2Risk Assessment Summary
Risk Assessment ComponentsRisk Rating: Low
Target(s):Assessment Time Frame: 3 years
This document has been
prepared specifically for the
above-named project and is
likely part of a larger set of
data. This sheet should be
used in conjunction with the
written report and should not
be used without the approval
and participation of the F.A.
Bartlett Tree Expert Company.
Residual Risk (see recommendations):
Tree Parts(s) of Concern: None
Condition Rating:Fair (73%)
ConsequencesLikelihood of Failure Likelihood of ImpactHealthStructureForm
Fair Good Good
Recommendations: Remove tree - direct or unsustainable impacts Notes: This tree is not shown on the provided survey/site plans.
Page 8 of 60
UFS|BC ● City of Renton Market/Piazza Project ● ISA Level 2 Basic Assessment Matrix October 08, 2024
Tree ID:Dripline Ave. (r)Species:Katsura (Cercidiphyllum japonicum)Height11.8 inDBH/QMD:920 ft 12 ftStems:1Risk Assessment Summary
Risk Assessment ComponentsRisk Rating: Low
Target(s):Assessment Time Frame: 3 years
This document has been
prepared specifically for the
above-named project and is
likely part of a larger set of
data. This sheet should be
used in conjunction with the
written report and should not
be used without the approval
and participation of the F.A.
Bartlett Tree Expert Company.
Residual Risk (see recommendations):
Tree Parts(s) of Concern: None
Condition Rating:Fair (66%)
ConsequencesLikelihood of Failure Likelihood of ImpactHealthStructureForm
Good Fair Fair
Recommendations: Remove tree - direct or unsustainable impacts Notes: This tree is not shown on the provided survey/site plans.
Page 9 of 60
UFS|BC ● City of Renton Market/Piazza Project ● ISA Level 2 Basic Assessment Matrix October 08, 2024
Tree ID:Dripline Ave. (r)Species:Vine maple (Acer circinatum)Height5.2 inDBH/QMD:1010 ft 10 ftStems:5Risk Assessment Summary
Risk Assessment ComponentsRisk Rating: Low
Target(s):Assessment Time Frame: 3 years
This document has been
prepared specifically for the
above-named project and is
likely part of a larger set of
data. This sheet should be
used in conjunction with the
written report and should not
be used without the approval
and participation of the F.A.
Bartlett Tree Expert Company.
Residual Risk (see recommendations):
Tree Parts(s) of Concern: None
Condition Rating:Fair (73%)
ConsequencesLikelihood of Failure Likelihood of ImpactHealthStructureForm
Fair Good Good
Recommendations: Remove tree - direct or unsustainable impacts Notes: This tree is not shown on the provided survey/site plans.
Page 10 of 60
UFS|BC ● City of Renton Market/Piazza Project ● ISA Level 2 Basic Assessment Matrix October 08, 2024
Tree ID:Dripline Ave. (r)Species:Katsura (Cercidiphyllum japonicum)Height13.4 inDBH/QMD:1120 ft 14 ftStems:4Risk Assessment Summary
Risk Assessment ComponentsRisk Rating: Low
Target(s): PedestriansAssessment Time Frame: 3 years
This document has been
prepared specifically for the
above-named project and is
likely part of a larger set of
data. This sheet should be
used in conjunction with the
written report and should not
be used without the approval
and participation of the F.A.
Bartlett Tree Expert Company.
Residual Risk (see recommendations):
Tree Parts(s) of Concern: Codominant stems with included bark
Condition Rating:Fair (60%)
ConsequencesLikelihood of Failure Likelihood of ImpactHealthStructureForm
Good Possible MinorPoorLowFair
Recommendations: Remove tree - direct or unsustainable impacts Notes:
Page 11 of 60
UFS|BC ● City of Renton Market/Piazza Project ● ISA Level 2 Basic Assessment Matrix October 08, 2024
Tree ID:Dripline Ave. (r)Species:Vine maple (Acer circinatum)Height9 inDBH/QMD:1210 ft 10 ftStems:11Risk Assessment Summary
Risk Assessment ComponentsRisk Rating: Low
Target(s):Assessment Time Frame: 3 years
This document has been
prepared specifically for the
above-named project and is
likely part of a larger set of
data. This sheet should be
used in conjunction with the
written report and should not
be used without the approval
and participation of the F.A.
Bartlett Tree Expert Company.
Residual Risk (see recommendations):
Tree Parts(s) of Concern:
Condition Rating:Fair (66%)
ConsequencesLikelihood of Failure Likelihood of ImpactHealthStructureForm
Good Fair Fair
Recommendations: Remove tree - direct or unsustainable impacts Notes: This tree is not shown on the provided survey/site plans.
Page 12 of 60
UFS|BC ● City of Renton Market/Piazza Project ● ISA Level 2 Basic Assessment Matrix October 08, 2024
Tree ID:Dripline Ave. (r)Species:Strawberry tree (Arbutus unedo)Height11.1 inDBH/QMD:138 ft 8 ftStems:6Risk Assessment Summary
Risk Assessment ComponentsRisk Rating: Low
Target(s):Assessment Time Frame: 3 years
This document has been
prepared specifically for the
above-named project and is
likely part of a larger set of
data. This sheet should be
used in conjunction with the
written report and should not
be used without the approval
and participation of the F.A.
Bartlett Tree Expert Company.
Residual Risk (see recommendations):
Tree Parts(s) of Concern: None
Condition Rating:Good (80%)
ConsequencesLikelihood of Failure Likelihood of ImpactHealthStructureForm
Good Good Good
Recommendations: Remove tree - direct or unsustainable impacts Notes: This tree is not shown on the provided survey/site plans.
Page 13 of 60
UFS|BC ● City of Renton Market/Piazza Project ● ISA Level 2 Basic Assessment Matrix October 08, 2024
Tree ID:Dripline Ave. (r)Species:Vine maple (Acer circinatum)Height5.2 inDBH/QMD:148 ft 6 ftStems:3Risk Assessment Summary
Risk Assessment ComponentsRisk Rating: Low
Target(s):Assessment Time Frame: 3 years
This document has been
prepared specifically for the
above-named project and is
likely part of a larger set of
data. This sheet should be
used in conjunction with the
written report and should not
be used without the approval
and participation of the F.A.
Bartlett Tree Expert Company.
Residual Risk (see recommendations):
Tree Parts(s) of Concern: None
Condition Rating:Fair (60%)
ConsequencesLikelihood of Failure Likelihood of ImpactHealthStructureForm
Fair Fair Fair
Recommendations: Remove tree - direct or unsustainable impacts Notes: This tree is not shown on the provided survey/site plans. The tree has diminished
vigor and cracking sunken bark on the southside, possibly sun scald or canker.
Page 14 of 60
UFS|BC ● City of Renton Market/Piazza Project ● ISA Level 2 Basic Assessment Matrix October 08, 2024
Tree ID:Dripline Ave. (r)Species:Strawberry tree (Arbutus unedo)Height10.3 inDBH/QMD:159 ft 10 ftStems:9Risk Assessment Summary
Risk Assessment ComponentsRisk Rating: Low
Target(s):Assessment Time Frame: 3 years
This document has been
prepared specifically for the
above-named project and is
likely part of a larger set of
data. This sheet should be
used in conjunction with the
written report and should not
be used without the approval
and participation of the F.A.
Bartlett Tree Expert Company.
Residual Risk (see recommendations):
Tree Parts(s) of Concern: None
Condition Rating:Good (80%)
ConsequencesLikelihood of Failure Likelihood of ImpactHealthStructureForm
Good Good Good
Recommendations: Remove tree - direct or unsustainable impacts Notes: This tree is not shown on the provided survey/site plans. The tree is possibly two
different trees, but I am considering it as one.
Page 15 of 60
UFS|BC ● City of Renton Market/Piazza Project ● ISA Level 2 Basic Assessment Matrix October 08, 2024
Tree ID:Dripline Ave. (r)Species:Vine maple (Acer circinatum)Height4.7 inDBH/QMD:1612 ft 8 ftStems:2Risk Assessment Summary
Risk Assessment ComponentsRisk Rating: Low
Target(s):Assessment Time Frame: 3 years
This document has been
prepared specifically for the
above-named project and is
likely part of a larger set of
data. This sheet should be
used in conjunction with the
written report and should not
be used without the approval
and participation of the F.A.
Bartlett Tree Expert Company.
Residual Risk (see recommendations):
Tree Parts(s) of Concern: None
Condition Rating:Fair (60%)
ConsequencesLikelihood of Failure Likelihood of ImpactHealthStructureForm
Fair Fair Fair
Recommendations: Remove tree - direct or unsustainable impacts Notes: This tree is not shown on the provided survey/site plans.
Page 16 of 60
UFS|BC ● City of Renton Market/Piazza Project ● ISA Level 2 Basic Assessment Matrix October 08, 2024
Tree ID:Dripline Ave. (r)Species:Flowering dogwood (Cornus florida)Height4.2 inDBH/QMD:179 ft 6 ftStems:1Risk Assessment Summary
Risk Assessment ComponentsRisk Rating: Low
Target(s):Assessment Time Frame: 3 years
This document has been
prepared specifically for the
above-named project and is
likely part of a larger set of
data. This sheet should be
used in conjunction with the
written report and should not
be used without the approval
and participation of the F.A.
Bartlett Tree Expert Company.
Residual Risk (see recommendations):
Tree Parts(s) of Concern: None
Condition Rating:Fair (73%)
ConsequencesLikelihood of Failure Likelihood of ImpactHealthStructureForm
Good Good Fair
Recommendations: Retain with protection.Notes: This tree is not shown on the provided survey/site plans.
Page 17 of 60
UFS|BC ● City of Renton Market/Piazza Project ● ISA Level 2 Basic Assessment Matrix October 08, 2024
Tree ID:Dripline Ave. (r)Species:Western serviceberry (Amelanchier alnifolia)Height6.2 inDBH/QMD:1814 ft 12 ftStems:6Risk Assessment Summary
Risk Assessment ComponentsRisk Rating: Low
Target(s):Assessment Time Frame: 3 years
This document has been
prepared specifically for the
above-named project and is
likely part of a larger set of
data. This sheet should be
used in conjunction with the
written report and should not
be used without the approval
and participation of the F.A.
Bartlett Tree Expert Company.
Residual Risk (see recommendations):
Tree Parts(s) of Concern: None
Condition Rating:Good (80%)
ConsequencesLikelihood of Failure Likelihood of ImpactHealthStructureForm
Good Good Good
Recommendations: Retain with protection.Notes: This tree is not shown on the provided survey/site plans.
Page 18 of 60
UFS|BC ● City of Renton Market/Piazza Project ● ISA Level 2 Basic Assessment Matrix October 08, 2024
Tree ID:Dripline Ave. (r)Species:Western serviceberry (Amelanchier alnifolia)Height5.3 inDBH/QMD:1914 ft 12 ftStems:4Risk Assessment Summary
Risk Assessment ComponentsRisk Rating: Low
Target(s):Assessment Time Frame: 3 years
This document has been
prepared specifically for the
above-named project and is
likely part of a larger set of
data. This sheet should be
used in conjunction with the
written report and should not
be used without the approval
and participation of the F.A.
Bartlett Tree Expert Company.
Residual Risk (see recommendations):
Tree Parts(s) of Concern: None
Condition Rating:Good (80%)
ConsequencesLikelihood of Failure Likelihood of ImpactHealthStructureForm
Good Good Good
Recommendations: Retain with protection.Notes: This tree is not shown on the provided survey/site plans.
Page 19 of 60
UFS|BC ● City of Renton Market/Piazza Project ● ISA Level 2 Basic Assessment Matrix October 08, 2024
Tree ID:Dripline Ave. (r)Species:Western serviceberry (Amelanchier alnifolia)Height8.5 inDBH/QMD:2015 ft 12 ftStems:6Risk Assessment Summary
Risk Assessment ComponentsRisk Rating: Low
Target(s):Assessment Time Frame: 3 years
This document has been
prepared specifically for the
above-named project and is
likely part of a larger set of
data. This sheet should be
used in conjunction with the
written report and should not
be used without the approval
and participation of the F.A.
Bartlett Tree Expert Company.
Residual Risk (see recommendations):
Tree Parts(s) of Concern: None
Condition Rating:Good (80%)
ConsequencesLikelihood of Failure Likelihood of ImpactHealthStructureForm
Good Good Good
Recommendations: Remove tree - direct or unsustainable impacts Notes: This tree is not shown on the provided survey/site plans.
Page 20 of 60
UFS|BC ● City of Renton Market/Piazza Project ● ISA Level 2 Basic Assessment Matrix October 08, 2024
Tree ID:Dripline Ave. (r)Species:Western serviceberry (Amelanchier alnifolia)Height5.1 inDBH/QMD:218 ft 6 ftStems:2Risk Assessment Summary
Risk Assessment ComponentsRisk Rating: Low
Target(s):Assessment Time Frame: 3 years
This document has been
prepared specifically for the
above-named project and is
likely part of a larger set of
data. This sheet should be
used in conjunction with the
written report and should not
be used without the approval
and participation of the F.A.
Bartlett Tree Expert Company.
Residual Risk (see recommendations):
Tree Parts(s) of Concern: None
Condition Rating:Good (80%)
ConsequencesLikelihood of Failure Likelihood of ImpactHealthStructureForm
Good Good Good
Recommendations: Retain with protection.Notes: This tree is not shown on the provided survey/site plans.
Page 21 of 60
UFS|BC ● City of Renton Market/Piazza Project ● ISA Level 2 Basic Assessment Matrix October 08, 2024
Tree ID:Dripline Ave. (r)Species:Red maple (Acer rubrum)Height15.8 inDBH/QMD:2250 ft 15 ftStems:1Risk Assessment Summary
Risk Assessment ComponentsRisk Rating: Low
Target(s):Assessment Time Frame: 3 years
This document has been
prepared specifically for the
above-named project and is
likely part of a larger set of
data. This sheet should be
used in conjunction with the
written report and should not
be used without the approval
and participation of the F.A.
Bartlett Tree Expert Company.
Residual Risk (see recommendations):
Tree Parts(s) of Concern: None
Condition Rating:Fair (73%)
ConsequencesLikelihood of Failure Likelihood of ImpactHealthStructureForm
Good Fair Good
Recommendations: Retain with protection.Notes: This tree is growing within a 5 x 5’ planting pit. The planting pit grate is beginning to
contact the lower trunk. There is pavement displacement surrounding the planting pit.
Page 22 of 60
UFS|BC ● City of Renton Market/Piazza Project ● ISA Level 2 Basic Assessment Matrix October 08, 2024
Tree ID:Dripline Ave. (r)Species:Red maple (Acer rubrum)Height13.2 inDBH/QMD:2350 ft 15 ftStems:1Risk Assessment Summary
Risk Assessment ComponentsRisk Rating: Low
Target(s):Assessment Time Frame: 3 years
This document has been
prepared specifically for the
above-named project and is
likely part of a larger set of
data. This sheet should be
used in conjunction with the
written report and should not
be used without the approval
and participation of the F.A.
Bartlett Tree Expert Company.
Residual Risk (see recommendations):
Tree Parts(s) of Concern: None
Condition Rating:Fair (73%)
ConsequencesLikelihood of Failure Likelihood of ImpactHealthStructureForm
Good Fair Good
Recommendations: Retain with protection.Notes: This tree is growing within a 5 x 5’ planting pit. The planting pit grate is beginning to
contact the lower trunk. There is pavement displacement surrounding the planting pit.
Page 23 of 60
UFS|BC ● City of Renton Market/Piazza Project ● ISA Level 2 Basic Assessment Matrix October 08, 2024
Tree ID:Dripline Ave. (r)Species:Red maple (Acer rubrum)Height10.4 inDBH/QMD:2450 ft 15 ftStems:1Risk Assessment Summary
Risk Assessment ComponentsRisk Rating: Low
Target(s):Assessment Time Frame: 3 years
This document has been
prepared specifically for the
above-named project and is
likely part of a larger set of
data. This sheet should be
used in conjunction with the
written report and should not
be used without the approval
and participation of the F.A.
Bartlett Tree Expert Company.
Residual Risk (see recommendations):
Tree Parts(s) of Concern: None
Condition Rating:Fair (73%)
ConsequencesLikelihood of Failure Likelihood of ImpactHealthStructureForm
Good Fair Good
Recommendations: Retain with protection.Notes: This tree is growing within a 5 x 5’ planting pit. The tree exhibits slightly diminished
vigor and is potentially suppressed by neighboring trees.
Page 24 of 60
UFS|BC ● City of Renton Market/Piazza Project ● ISA Level 2 Basic Assessment Matrix October 08, 2024
Tree ID:Dripline Ave. (r)Species:Western serviceberry (Amelanchier alnifolia)Height6.2 inDBH/QMD:2514 ft 10 ftStems:2Risk Assessment Summary
Risk Assessment ComponentsRisk Rating: Low
Target(s):Assessment Time Frame: 3 years
This document has been
prepared specifically for the
above-named project and is
likely part of a larger set of
data. This sheet should be
used in conjunction with the
written report and should not
be used without the approval
and participation of the F.A.
Bartlett Tree Expert Company.
Residual Risk (see recommendations):
Tree Parts(s) of Concern: None
Condition Rating:Good (80%)
ConsequencesLikelihood of Failure Likelihood of ImpactHealthStructureForm
Good Good Good
Recommendations: Retain with protection.Notes: The root collar of this tree is slightly buried, and there is damage to the southmost
stem.
Page 25 of 60
UFS|BC ● City of Renton Market/Piazza Project ● ISA Level 2 Basic Assessment Matrix October 08, 2024
Tree ID:Dripline Ave. (r)Species:Katsura (Cercidiphyllum japonicum)Height15 inDBH/QMD:2640 ft 12 ftStems:3Risk Assessment Summary
Risk Assessment ComponentsRisk Rating: Low
Target(s): PedestriansAssessment Time Frame: 3 years
This document has been
prepared specifically for the
above-named project and is
likely part of a larger set of
data. This sheet should be
used in conjunction with the
written report and should not
be used without the approval
and participation of the F.A.
Bartlett Tree Expert Company.
Residual Risk (see recommendations):
Tree Parts(s) of Concern: Codominant stems with included bark
at their unionsCondition Rating:Fair (73%)
ConsequencesLikelihood of Failure Likelihood of ImpactHealthStructureForm
Good Possible SignificantFairLowGood
Recommendations: Retain with protection.Notes: This tree has three codominant stems with included bark at their unions.
Page 26 of 60
UFS|BC ● City of Renton Market/Piazza Project ● ISA Level 2 Basic Assessment Matrix October 08, 2024
Tree ID:Dripline Ave. (r)Species:Red maple (Acer rubrum)Height12.5 inDBH/QMD:2750 ft 15 ftStems:1Risk Assessment Summary
Risk Assessment ComponentsRisk Rating: Low
Target(s):Assessment Time Frame: 3 years
This document has been
prepared specifically for the
above-named project and is
likely part of a larger set of
data. This sheet should be
used in conjunction with the
written report and should not
be used without the approval
and participation of the F.A.
Bartlett Tree Expert Company.
Residual Risk (see recommendations):
Tree Parts(s) of Concern: None
Condition Rating:Fair (73%)
ConsequencesLikelihood of Failure Likelihood of ImpactHealthStructureForm
Good Fair Good
Recommendations: Retain with Protection. Clearance pruning may be required
for construction.
Notes: This tree is growing within a 5 x 5’ planting pit. The planting pit grate is beginning to
contact the lower trunk. There is pavement displacement surrounding the planting pit.
Page 27 of 60
UFS|BC ● City of Renton Market/Piazza Project ● ISA Level 2 Basic Assessment Matrix October 08, 2024
Tree ID:Dripline Ave. (r)Species:Honeylocust (Gleditsia triacanthos)Height15.4 inDBH/QMD:2850 ft 27.5 ftStems:1Risk Assessment Summary
Risk Assessment ComponentsRisk Rating: Moderate
Target(s): PedestriansAssessment Time Frame: 3 years
This document has been
prepared specifically for the
above-named project and is
likely part of a larger set of
data. This sheet should be
used in conjunction with the
written report and should not
be used without the approval
and participation of the F.A.
Bartlett Tree Expert Company.
Residual Risk (see recommendations): Low
Tree Parts(s) of Concern: Long overextended branches
Condition Rating:Fair (60%)
ConsequencesLikelihood of Failure Likelihood of ImpactHealthStructureForm
Fair Probable SignificantFairMediumFair
Recommendations: Retain with protection. Reduce the length of long
overextended branches to lower the likelihood of failure. Clearance pruning may
be required for construction.
Notes: This tree is growing in a 5 x 5‘ planting pit. Pavement uplift surrounding the pit is
minimal. The planting pit grate is beginning to contact the lower trunk. This tree contains one
large lower branch on the south side that is quite long and horizontal, which may be prone to
failing during heavy rain or snow loads.
Page 28 of 60
UFS|BC ● City of Renton Market/Piazza Project ● ISA Level 2 Basic Assessment Matrix October 08, 2024
Tree ID:Dripline Ave. (r)Species:Honeylocust (Gleditsia triacanthos)Height13.8 inDBH/QMD:2950 ft 25 ftStems:1Risk Assessment Summary
Risk Assessment ComponentsRisk Rating: Low
Target(s):Assessment Time Frame: 3 years
This document has been
prepared specifically for the
above-named project and is
likely part of a larger set of
data. This sheet should be
used in conjunction with the
written report and should not
be used without the approval
and participation of the F.A.
Bartlett Tree Expert Company.
Residual Risk (see recommendations):
Tree Parts(s) of Concern: None
Condition Rating:Fair (60%)
ConsequencesLikelihood of Failure Likelihood of ImpactHealthStructureForm
Fair Fair Fair
Recommendations: Retain with Protection. Clearance pruning may be required
for construction.
Notes: This tree is growing in a 5 x 5‘ planting pit. Pavement uplift surrounding the pit is
minimal.
Page 29 of 60
UFS|BC ● City of Renton Market/Piazza Project ● ISA Level 2 Basic Assessment Matrix October 08, 2024
Tree ID:Dripline Ave. (r)Species:Colorado spruce (Picea pungens)Height14.1 inDBH/QMD:3055 ft 9 ftStems:1Risk Assessment Summary
Risk Assessment ComponentsRisk Rating: Low
Target(s):Assessment Time Frame: 3 years
This document has been
prepared specifically for the
above-named project and is
likely part of a larger set of
data. This sheet should be
used in conjunction with the
written report and should not
be used without the approval
and participation of the F.A.
Bartlett Tree Expert Company.
Residual Risk (see recommendations):
Tree Parts(s) of Concern: None
Condition Rating:Good (80%)
ConsequencesLikelihood of Failure Likelihood of ImpactHealthStructureForm
Good Good Good
Recommendations: Retain with protection. Remove string lights to prevent
constriction
Notes: String lights have been installed and left in the tree. The light strands are wrapped
around branches and the trunk. Over time, these lights may girdle branches and trunk tissue.
Page 30 of 60
UFS|BC ● City of Renton Market/Piazza Project ● ISA Level 2 Basic Assessment Matrix October 08, 2024
Tree ID:Dripline Ave. (r)Species:Vine maple (Acer circinatum)Height7.5 inDBH/QMD:319 ft 11 ftStems:1Risk Assessment Summary
Risk Assessment ComponentsRisk Rating: Low
Target(s):Assessment Time Frame: 3 years
This document has been
prepared specifically for the
above-named project and is
likely part of a larger set of
data. This sheet should be
used in conjunction with the
written report and should not
be used without the approval
and participation of the F.A.
Bartlett Tree Expert Company.
Residual Risk (see recommendations):
Tree Parts(s) of Concern: None
Condition Rating:Fair (73%)
ConsequencesLikelihood of Failure Likelihood of ImpactHealthStructureForm
Good Good Fair
Recommendations: Retain with protection.Notes:
Page 31 of 60
UFS|BC ● City of Renton Market/Piazza Project ● ISA Level 2 Basic Assessment Matrix October 08, 2024
Tree ID:Dripline Ave. (r)Species:Honeylocust (Gleditsia triacanthos)Height7.3 inDBH/QMD:3215 ft 12 ftStems:1Risk Assessment Summary
Risk Assessment ComponentsRisk Rating: Low
Target(s):Assessment Time Frame: 3 years
This document has been
prepared specifically for the
above-named project and is
likely part of a larger set of
data. This sheet should be
used in conjunction with the
written report and should not
be used without the approval
and participation of the F.A.
Bartlett Tree Expert Company.
Residual Risk (see recommendations):
Tree Parts(s) of Concern: None
Condition Rating:Fair (60%)
ConsequencesLikelihood of Failure Likelihood of ImpactHealthStructureForm
Fair Fair Fair
Recommendations: Retain with protection.Notes: This tree is growing in a circular 6-foot diameter planting pit. There’s some form of
metal mesh incorporated within the planting pit.
Page 32 of 60
UFS|BC ● City of Renton Market/Piazza Project ● ISA Level 2 Basic Assessment Matrix October 08, 2024
Tree ID:Dripline Ave. (r)Species:Honeylocust (Gleditsia triacanthos)Height10.5 inDBH/QMD:3335 ft 18 ftStems:1Risk Assessment Summary
Risk Assessment ComponentsRisk Rating: Low
Target(s):Assessment Time Frame: 3 years
This document has been
prepared specifically for the
above-named project and is
likely part of a larger set of
data. This sheet should be
used in conjunction with the
written report and should not
be used without the approval
and participation of the F.A.
Bartlett Tree Expert Company.
Residual Risk (see recommendations):
Tree Parts(s) of Concern: None
Condition Rating:Fair (60%)
ConsequencesLikelihood of Failure Likelihood of ImpactHealthStructureForm
Fair Fair Fair
Recommendations: Remove tree - direct or unsustainable impacts Notes: The project plans to remove this tree. The tree is growing in a circular 6-foot diameter
planting pit. Landscape lighting is present within the planting pit.
Page 33 of 60
UFS|BC ● City of Renton Market/Piazza Project ● ISA Level 2 Basic Assessment Matrix October 08, 2024
Tree ID:Dripline Ave. (r)Species:Honeylocust (Gleditsia triacanthos)Height13.8 inDBH/QMD:3445 ft 24 ftStems:1Risk Assessment Summary
Risk Assessment ComponentsRisk Rating: Low
Target(s):Assessment Time Frame: 3 years
This document has been
prepared specifically for the
above-named project and is
likely part of a larger set of
data. This sheet should be
used in conjunction with the
written report and should not
be used without the approval
and participation of the F.A.
Bartlett Tree Expert Company.
Residual Risk (see recommendations):
Tree Parts(s) of Concern: None
Condition Rating:Fair (60%)
ConsequencesLikelihood of Failure Likelihood of ImpactHealthStructureForm
Fair Fair Fair
Recommendations: Remove tree - direct or unsustainable impacts Notes: The project plans to remove this tree. This tree is growing in a circular 6-foot diameter
planting pit. Landscape lighting is present within the planting pit.
Page 34 of 60
UFS|BC ● City of Renton Market/Piazza Project ● ISA Level 2 Basic Assessment Matrix October 08, 2024
Tree ID:Dripline Ave. (r)Species:Honeylocust (Gleditsia triacanthos)Height10.6 inDBH/QMD:3525 ft 18 ftStems:1Risk Assessment Summary
Risk Assessment ComponentsRisk Rating: Low
Target(s):Assessment Time Frame: 3 years
This document has been
prepared specifically for the
above-named project and is
likely part of a larger set of
data. This sheet should be
used in conjunction with the
written report and should not
be used without the approval
and participation of the F.A.
Bartlett Tree Expert Company.
Residual Risk (see recommendations):
Tree Parts(s) of Concern: None
Condition Rating:Fair (60%)
ConsequencesLikelihood of Failure Likelihood of ImpactHealthStructureForm
Fair Fair Fair
Recommendations: Remove tree - direct or unsustainable impacts Notes: The project plans to remove this tree. This tree is growing in a circular 6-foot diameter
planting pit. Trunk damage has occurred on the north side, and root damage on the east side.
Page 35 of 60
UFS|BC ● City of Renton Market/Piazza Project ● ISA Level 2 Basic Assessment Matrix October 08, 2024
Tree ID:Dripline Ave. (r)Species:Honeylocust (Gleditsia triacanthos)Height9.9 inDBH/QMD:3625 ft 15 ftStems:1Risk Assessment Summary
Risk Assessment ComponentsRisk Rating: Low
Target(s):Assessment Time Frame: 3 years
This document has been
prepared specifically for the
above-named project and is
likely part of a larger set of
data. This sheet should be
used in conjunction with the
written report and should not
be used without the approval
and participation of the F.A.
Bartlett Tree Expert Company.
Residual Risk (see recommendations):
Tree Parts(s) of Concern: None
Condition Rating:Fair (60%)
ConsequencesLikelihood of Failure Likelihood of ImpactHealthStructureForm
Fair Fair Fair
Recommendations: Retain with protection.Notes: This tree is growing in a circular 6-foot diameter planting pit. There is a wire mesh
material embedded within the planting pit. The tree leans slightly to the west.
Page 36 of 60
UFS|BC ● City of Renton Market/Piazza Project ● ISA Level 2 Basic Assessment Matrix October 08, 2024
Tree ID:Dripline Ave. (r)Species:Honeylocust (Gleditsia triacanthos)Height5.4 inDBH/QMD:3712 ft 8 ftStems:1Risk Assessment Summary
Risk Assessment ComponentsRisk Rating: Low
Target(s):Assessment Time Frame: 3 years
This document has been
prepared specifically for the
above-named project and is
likely part of a larger set of
data. This sheet should be
used in conjunction with the
written report and should not
be used without the approval
and participation of the F.A.
Bartlett Tree Expert Company.
Residual Risk (see recommendations):
Tree Parts(s) of Concern: None
Condition Rating:Poor (46%)
ConsequencesLikelihood of Failure Likelihood of ImpactHealthStructureForm
Poor Fair Poor
Recommendations: Remove tree - direct or unsustainable impacts Notes: The project plans to remove this tree. This tree is growing in a circular 6-foot diameter
planting pit. The tree exhibits significantly diminished vigor.
Page 37 of 60
UFS|BC ● City of Renton Market/Piazza Project ● ISA Level 2 Basic Assessment Matrix October 08, 2024
Tree ID:Dripline Ave. (r)Species:Honeylocust (Gleditsia triacanthos)Height5.9 inDBH/QMD:3812 ft 8 ftStems:1Risk Assessment Summary
Risk Assessment ComponentsRisk Rating: Low
Target(s):Assessment Time Frame: 3 years
This document has been
prepared specifically for the
above-named project and is
likely part of a larger set of
data. This sheet should be
used in conjunction with the
written report and should not
be used without the approval
and participation of the F.A.
Bartlett Tree Expert Company.
Residual Risk (see recommendations):
Tree Parts(s) of Concern: None
Condition Rating:Poor (46%)
ConsequencesLikelihood of Failure Likelihood of ImpactHealthStructureForm
Poor Fair Poor
Recommendations: Remove tree - poor health. Replace with a better
specimen.
Notes: This tree is growing in a circular 6-foot diameter planting pit. The tree exhibits
significantly diminished vigor.
Page 38 of 60
UFS|BC ● City of Renton Market/Piazza Project ● ISA Level 2 Basic Assessment Matrix October 08, 2024
Tree ID:Dripline Ave. (r)Species:Honeylocust (Gleditsia triacanthos)Height15 inDBH/QMD:3945 ft 26.3 ftStems:1Risk Assessment Summary
Risk Assessment ComponentsRisk Rating: Moderate
Target(s): PedestriansAssessment Time Frame: 3 years
This document has been
prepared specifically for the
above-named project and is
likely part of a larger set of
data. This sheet should be
used in conjunction with the
written report and should not
be used without the approval
and participation of the F.A.
Bartlett Tree Expert Company.
Residual Risk (see recommendations): Low
Tree Parts(s) of Concern: Long overextended branches
Condition Rating:Fair (66%)
ConsequencesLikelihood of Failure Likelihood of ImpactHealthStructureForm
Good Probable SignificantFairMediumFair
Recommendations: Retain with protection. Reduce the length of long
overextended branches to lower the likelihood of failure. Clearance pruning may
be required for construction.
Notes: This tree is growing in a 5 x 5‘ planting pit. Pavement uplift surrounding the pit is
minimal. The planting pit grate is beginning to contact the lower trunk. This tree contains one
large lower branch on the south side that is quite long and horizontal, which may be prone to
failing during heavy rain or snow loads.
Page 39 of 60
UFS|BC ● City of Renton Market/Piazza Project ● ISA Level 2 Basic Assessment Matrix October 08, 2024
Tree ID:Dripline Ave. (r)Species:Honeylocust (Gleditsia triacanthos)Height9.9 inDBH/QMD:4025 ft 15 ftStems:1Risk Assessment Summary
Risk Assessment ComponentsRisk Rating: Low
Target(s):Assessment Time Frame: 3 years
This document has been
prepared specifically for the
above-named project and is
likely part of a larger set of
data. This sheet should be
used in conjunction with the
written report and should not
be used without the approval
and participation of the F.A.
Bartlett Tree Expert Company.
Residual Risk (see recommendations):
Tree Parts(s) of Concern: None
Condition Rating:Fair (66%)
ConsequencesLikelihood of Failure Likelihood of ImpactHealthStructureForm
Good Fair Fair
Recommendations: Retain with protection.Notes: This tree is growing in a 5 x 5’ planting pit. There is a wire mesh material embedded
within the planting pit. Significant pavement uplift is occurring surrounding this planting pit,
which is being managed by grinding the concrete and painting the raised areas with high
visibility paint to warn of the tripping hazard.
Page 40 of 60
UFS|BC ● City of Renton Market/Piazza Project ● ISA Level 2 Basic Assessment Matrix October 08, 2024
Tree ID:Dripline Ave. (r)Species:Red maple (Acer rubrum)Height21.9 inDBH/QMD:4155 ft 18 ftStems:1Risk Assessment Summary
Risk Assessment ComponentsRisk Rating: Low
Target(s):Assessment Time Frame: 3 years
This document has been
prepared specifically for the
above-named project and is
likely part of a larger set of
data. This sheet should be
used in conjunction with the
written report and should not
be used without the approval
and participation of the F.A.
Bartlett Tree Expert Company.
Residual Risk (see recommendations):
Tree Parts(s) of Concern: None
Condition Rating:Good (80%)
ConsequencesLikelihood of Failure Likelihood of ImpactHealthStructureForm
Good Good Good
Recommendations: Retain with protection.Notes: This tree is growing within a 5 x 5’ planting pit. The planting pit grate is beginning to
contact the lower trunk. Pavement displacement is occurring surrounding the planting pit.
Page 41 of 60
UFS|BC ● City of Renton Market/Piazza Project ● ISA Level 2 Basic Assessment Matrix October 08, 2024
Tree ID:Dripline Ave. (r)Species:Red maple (Acer rubrum)Height18 inDBH/QMD:4255 ft 18 ftStems:1Risk Assessment Summary
Risk Assessment ComponentsRisk Rating: Low
Target(s):Assessment Time Frame: 3 years
This document has been
prepared specifically for the
above-named project and is
likely part of a larger set of
data. This sheet should be
used in conjunction with the
written report and should not
be used without the approval
and participation of the F.A.
Bartlett Tree Expert Company.
Residual Risk (see recommendations):
Tree Parts(s) of Concern: None
Condition Rating:Fair (73%)
ConsequencesLikelihood of Failure Likelihood of ImpactHealthStructureForm
Good Fair Good
Recommendations: Retain with protection.Notes: This tree is growing within a 5 x 5’ planting pit. The planting pit grate is beginning to
contact the lower trunk. Pavement displacement is occurring surrounding the planting pit.
Page 42 of 60
UFS|BC ● City of Renton Market/Piazza Project ● ISA Level 2 Basic Assessment Matrix October 08, 2024
Tree ID:Dripline Ave. (r)Species:Red maple (Acer rubrum)Height16.9 inDBH/QMD:4355 ft 18 ftStems:1Risk Assessment Summary
Risk Assessment ComponentsRisk Rating: Low
Target(s):Assessment Time Frame: 3 years
This document has been
prepared specifically for the
above-named project and is
likely part of a larger set of
data. This sheet should be
used in conjunction with the
written report and should not
be used without the approval
and participation of the F.A.
Bartlett Tree Expert Company.
Residual Risk (see recommendations):
Tree Parts(s) of Concern: None
Condition Rating:Fair (73%)
ConsequencesLikelihood of Failure Likelihood of ImpactHealthStructureForm
Good Fair Good
Recommendations: Retain with protection.Notes: This tree is growing within a 5 x 5’ planting pit. The grate is missing from this pit, or it
never existed. Pavement displacement is occurring surrounding the planting pit.
Page 43 of 60
UFS|BC ● City of Renton Market/Piazza Project ● ISA Level 2 Basic Assessment Matrix October 08, 2024
Tree ID:Dripline Ave. (r)Species:Red maple (Acer rubrum)Height23.7 inDBH/QMD:4455 ft 20 ftStems:1Risk Assessment Summary
Risk Assessment ComponentsRisk Rating: Low
Target(s):Assessment Time Frame: 3 years
This document has been
prepared specifically for the
above-named project and is
likely part of a larger set of
data. This sheet should be
used in conjunction with the
written report and should not
be used without the approval
and participation of the F.A.
Bartlett Tree Expert Company.
Residual Risk (see recommendations):
Tree Parts(s) of Concern: None
Condition Rating:Good (80%)
ConsequencesLikelihood of Failure Likelihood of ImpactHealthStructureForm
Good Good Good
Recommendations: Retain with protection.Notes: This tree is growing within a long, narrow, planting pit surrounded by woody hedges.
Surface roots are present, and the roots appear bound, confined, and outgrowing the planting
location.
Page 44 of 60
UFS|BC ● City of Renton Market/Piazza Project ● ISA Level 2 Basic Assessment Matrix October 08, 2024
Tree ID:Dripline Ave. (r)Species:Red maple (Acer rubrum)Height21 inDBH/QMD:4555 ft 20 ftStems:1Risk Assessment Summary
Risk Assessment ComponentsRisk Rating: Low
Target(s):Assessment Time Frame: 3 years
This document has been
prepared specifically for the
above-named project and is
likely part of a larger set of
data. This sheet should be
used in conjunction with the
written report and should not
be used without the approval
and participation of the F.A.
Bartlett Tree Expert Company.
Residual Risk (see recommendations):
Tree Parts(s) of Concern: None
Condition Rating:Fair (73%)
ConsequencesLikelihood of Failure Likelihood of ImpactHealthStructureForm
Good Fair Good
Recommendations: Retain with protection.Notes: This tree is growing within a long, narrow, planting pit surrounded by woody hedges.
Surface roots are present, and the roots appear bound, confined, and outgrowing the planting
location. Some branch unions appear to contain included bark; however, the upright nature of
the branches appears stable.
Page 45 of 60
UFS|BC ● City of Renton Market/Piazza Project ● ISA Level 2 Basic Assessment Matrix October 08, 2024
Tree ID:Dripline Ave. (r)Species:Red maple (Acer rubrum)Height19 inDBH/QMD:4655 ft 18 ftStems:1Risk Assessment Summary
Risk Assessment ComponentsRisk Rating: Low
Target(s):Assessment Time Frame: 3 years
This document has been
prepared specifically for the
above-named project and is
likely part of a larger set of
data. This sheet should be
used in conjunction with the
written report and should not
be used without the approval
and participation of the F.A.
Bartlett Tree Expert Company.
Residual Risk (see recommendations):
Tree Parts(s) of Concern: None
Condition Rating:Good (80%)
ConsequencesLikelihood of Failure Likelihood of ImpactHealthStructureForm
Good Good Good
Recommendations: Retain with protection.Notes: This tree is growing within a long, narrow, planting pit surrounded by woody hedges.
Surface roots are present, and the roots appear bound, confined, and outgrowing the planting
location. The tree is slightly suppressed by the neighboring trees.
Page 46 of 60
UFS|BC ● City of Renton Market/Piazza Project ● ISA Level 2 Basic Assessment Matrix October 08, 2024
Tree ID:Dripline Ave. (r)Species:Red maple (Acer rubrum)Height18.8 inDBH/QMD:4755 ft 20 ftStems:1Risk Assessment Summary
Risk Assessment ComponentsRisk Rating: High
Target(s): Pedestrians, bus stop infrastructure, market building
structure, vehicular parkingAssessment Time Frame: 3 years
This document has been
prepared specifically for the
above-named project and is
likely part of a larger set of
data. This sheet should be
used in conjunction with the
written report and should not
be used without the approval
and participation of the F.A.
Bartlett Tree Expert Company.
Residual Risk (see recommendations): Low
Tree Parts(s) of Concern: Multiple stems with significant included
bark and apparent decay at the unions.Condition Rating:Fair (53%)
ConsequencesLikelihood of Failure Likelihood of ImpactHealthStructureForm
Fair Probable SeverePoorHighFair
Recommendations: Remove tree - high risk. Consider replacing with a similar
species/cultivar
Notes: This tree is growing within a long, narrow, planting pit surrounded by woody hedges.
Surface roots are present, and the roots appear bound, confined, and outgrowing the planting
location. The tree contains multiple large upright branches with included bark and decay at
their unions, which and are highly likely to fail during strong wind events. There is also an old
pruning injury near the base of the tree at around 6 feet that is occluding and beginning to
decay.
Page 47 of 60
UFS|BC ● City of Renton Market/Piazza Project ● ISA Level 2 Basic Assessment Matrix October 08, 2024
Tree ID:Dripline Ave. (r)Species:Red maple (Acer rubrum)Height20.8 inDBH/QMD:4855 ft 20 ftStems:1Risk Assessment Summary
Risk Assessment ComponentsRisk Rating: Low
Target(s):Assessment Time Frame: 3 years
This document has been
prepared specifically for the
above-named project and is
likely part of a larger set of
data. This sheet should be
used in conjunction with the
written report and should not
be used without the approval
and participation of the F.A.
Bartlett Tree Expert Company.
Residual Risk (see recommendations):
Tree Parts(s) of Concern: None
Condition Rating:Fair (73%)
ConsequencesLikelihood of Failure Likelihood of ImpactHealthStructureForm
Good Fair Good
Recommendations: Retain with protection.Notes: This tree is growing within a long, narrow, planting pit surrounded by woody hedges.
Surface roots are present, and the roots appear bound, confined, and outgrowing the planting
location.
Page 48 of 60
UFS|BC ● City of Renton Market/Piazza Project ● ISA Level 2 Basic Assessment Matrix October 08, 2024
Tree ID:Dripline Ave. (r)Species:Red maple (Acer rubrum)Height18.5 inDBH/QMD:4955 ft 20 ftStems:1Risk Assessment Summary
Risk Assessment ComponentsRisk Rating: Low
Target(s):Assessment Time Frame: 3 years
This document has been
prepared specifically for the
above-named project and is
likely part of a larger set of
data. This sheet should be
used in conjunction with the
written report and should not
be used without the approval
and participation of the F.A.
Bartlett Tree Expert Company.
Residual Risk (see recommendations):
Tree Parts(s) of Concern: None
Condition Rating:Good (80%)
ConsequencesLikelihood of Failure Likelihood of ImpactHealthStructureForm
Good Good Good
Recommendations: Retain with protection.Notes: This tree is growing within a long, narrow, planting pit surrounded by woody hedges.
Surface roots are present, and the roots appear bound, confined, and outgrowing the planting
location.
Page 49 of 60
UFS|BC ● City of Renton Market/Piazza Project ● ISA Level 2 Basic Assessment Matrix October 08, 2024
Tree ID:Dripline Ave. (r)Species:Red maple (Acer rubrum)Height20.6 inDBH/QMD:5055 ft 20 ftStems:1Risk Assessment Summary
Risk Assessment ComponentsRisk Rating: Low
Target(s):Assessment Time Frame: 3 years
This document has been
prepared specifically for the
above-named project and is
likely part of a larger set of
data. This sheet should be
used in conjunction with the
written report and should not
be used without the approval
and participation of the F.A.
Bartlett Tree Expert Company.
Residual Risk (see recommendations):
Tree Parts(s) of Concern: None
Condition Rating:Good (80%)
ConsequencesLikelihood of Failure Likelihood of ImpactHealthStructureForm
Good Good Good
Recommendations: Retain with protection.Notes: This tree is growing within a long, narrow, planting pit surrounded by woody hedges.
Surface roots are present, and the roots appear bound, confined, and outgrowing the planting
location.
Page 50 of 60
UFS|BC ● City of Renton Market/Piazza Project ● ISA Level 2 Basic Assessment Matrix October 08, 2024
Tree ID:Dripline Ave. (r)Species:Red maple (Acer rubrum)Height22.5 inDBH/QMD:5155 ft 20 ftStems:1Risk Assessment Summary
Risk Assessment ComponentsRisk Rating: Low
Target(s):Assessment Time Frame: 3 years
This document has been
prepared specifically for the
above-named project and is
likely part of a larger set of
data. This sheet should be
used in conjunction with the
written report and should not
be used without the approval
and participation of the F.A.
Bartlett Tree Expert Company.
Residual Risk (see recommendations):
Tree Parts(s) of Concern: None
Condition Rating:Good (80%)
ConsequencesLikelihood of Failure Likelihood of ImpactHealthStructureForm
Good Good Good
Recommendations: Retain with protection.Notes: This tree is growing within a long, narrow, planting pit surrounded by woody hedges.
Surface roots are present, and the roots appear bound, confined, and outgrowing the planting
location.
Page 51 of 60
UFS|BC ● City of Renton Market/Piazza Project ● ISA Level 2 Basic Assessment Matrix October 08, 2024
Tree ID:Dripline Ave. (r)Species:Red maple (Acer rubrum)Height11.9 inDBH/QMD:5250 ft 15 ftStems:1Risk Assessment Summary
Risk Assessment ComponentsRisk Rating: Low
Target(s):Assessment Time Frame: 3 years
This document has been
prepared specifically for the
above-named project and is
likely part of a larger set of
data. This sheet should be
used in conjunction with the
written report and should not
be used without the approval
and participation of the F.A.
Bartlett Tree Expert Company.
Residual Risk (see recommendations):
Tree Parts(s) of Concern: None
Condition Rating:Fair (66%)
ConsequencesLikelihood of Failure Likelihood of ImpactHealthStructureForm
Poor Good Good
Recommendations: Retain with Protection. Clearance pruning may be required
for construction. Nutrient deficiency correction is advised.
Notes: This tree is growing within a 5 x 5’ planting pit. The planting pit grate is beginning to
contact the lower trunk. There is pavement displacement surrounding the planting pit. The
foliage of this tree exhibits interveinal yellowing, which is a symptom of nutrient deficiency
(chlorosis). There’s a significant amount of trunk damage from carving/graffiti.
Page 52 of 60
UFS|BC ● City of Renton Market/Piazza Project ● ISA Level 2 Basic Assessment Matrix October 08, 2024
Tree ID:Dripline Ave. (r)Species:Red maple (Acer rubrum)Height10.6 inDBH/QMD:5350 ft 15 ftStems:1Risk Assessment Summary
Risk Assessment ComponentsRisk Rating: Low
Target(s):Assessment Time Frame: 3 years
This document has been
prepared specifically for the
above-named project and is
likely part of a larger set of
data. This sheet should be
used in conjunction with the
written report and should not
be used without the approval
and participation of the F.A.
Bartlett Tree Expert Company.
Residual Risk (see recommendations):
Tree Parts(s) of Concern: None
Condition Rating:Good (80%)
ConsequencesLikelihood of Failure Likelihood of ImpactHealthStructureForm
Good Good Good
Recommendations: Retain with Protection. Clearance pruning may be required
for construction.
Notes: This tree is growing within a 5 x 5’ planting pit. The planting pit grate is beginning to
contact the lower trunk. There is pavement displacement surrounding the planting pit.
Page 53 of 60
UFS|BC ● City of Renton Market/Piazza Project ● ISA Level 2 Basic Assessment Matrix October 08, 2024
Tree ID:Dripline Ave. (r)Species:Red maple (Acer rubrum)Height13.6 inDBH/QMD:5450 ft 15 ftStems:1Risk Assessment Summary
Risk Assessment ComponentsRisk Rating: Low
Target(s):Assessment Time Frame: 3 years
This document has been
prepared specifically for the
above-named project and is
likely part of a larger set of
data. This sheet should be
used in conjunction with the
written report and should not
be used without the approval
and participation of the F.A.
Bartlett Tree Expert Company.
Residual Risk (see recommendations):
Tree Parts(s) of Concern: None
Condition Rating:Fair (73%)
ConsequencesLikelihood of Failure Likelihood of ImpactHealthStructureForm
Good Fair Good
Recommendations: Retain with Protection. Clearance pruning may be required
for construction.
Notes: This tree is growing within a 5 x 5’ planting pit. The planting pit grate is beginning to
contact the lower trunk. There is pavement displacement surrounding the planting pit.
Page 54 of 60
UFS|BC ● City of Renton Market/Piazza Project ● ISA Level 2 Basic Assessment Matrix October 08, 2024
Tree ID:Dripline Ave. (r)Species:Green ash (Fraxinus pennsylvanica)Height10.9 inDBH/QMD:5550 ft 18 ftStems:1Risk Assessment Summary
Risk Assessment ComponentsRisk Rating: Low
Target(s):Assessment Time Frame: 3 years
This document has been
prepared specifically for the
above-named project and is
likely part of a larger set of
data. This sheet should be
used in conjunction with the
written report and should not
be used without the approval
and participation of the F.A.
Bartlett Tree Expert Company.
Residual Risk (see recommendations):
Tree Parts(s) of Concern: None
Condition Rating:Fair (53%)
ConsequencesLikelihood of Failure Likelihood of ImpactHealthStructureForm
Poor Fair Fair
Recommendations: Retain with protection. Consider Emerald Ash Borer (EAB)
preventative treatment.
Notes: EMERALD ASH BORRER VULNERABILITY CONSIDERATIONS. This tree is
growing within a narrow median planting strip and is surrounded by herbaceous ground
covers. An electrical outlet box is present within the planter and near the tree. The tree
exhibits diminished vigor throughout the canopy.
Page 55 of 60
UFS|BC ● City of Renton Market/Piazza Project ● ISA Level 2 Basic Assessment Matrix October 08, 2024
Tree ID:Dripline Ave. (r)Species:Green ash (Fraxinus pennsylvanica)Height12.7 inDBH/QMD:5650 ft 18 ftStems:1Risk Assessment Summary
Risk Assessment ComponentsRisk Rating: Low
Target(s):Assessment Time Frame: 3 years
This document has been
prepared specifically for the
above-named project and is
likely part of a larger set of
data. This sheet should be
used in conjunction with the
written report and should not
be used without the approval
and participation of the F.A.
Bartlett Tree Expert Company.
Residual Risk (see recommendations):
Tree Parts(s) of Concern: None
Condition Rating:Fair (53%)
ConsequencesLikelihood of Failure Likelihood of ImpactHealthStructureForm
Poor Fair Fair
Recommendations: Retain with protection. Consider Emerald Ash Borer (EAB)
preventative treatment.
Notes: EMERALD ASH BORRER VULNERABILITY CONSIDERATIONS. This tree is
growing within a narrow median planting strip and is surrounded by herbaceous ground
covers. An electrical outlet box is present within the planter and near the tree. The tree
exhibits diminished vigor throughout the canopy.
Page 56 of 60
UFS|BC ● City of Renton Market/Piazza Project ● ISA Level 2 Basic Assessment Matrix October 08, 2024
Tree ID:Dripline Ave. (r)Species:Green ash (Fraxinus pennsylvanica)Height15.6 inDBH/QMD:5755 ft 18 ftStems:1Risk Assessment Summary
Risk Assessment ComponentsRisk Rating: Low
Target(s):Assessment Time Frame: 3 years
This document has been
prepared specifically for the
above-named project and is
likely part of a larger set of
data. This sheet should be
used in conjunction with the
written report and should not
be used without the approval
and participation of the F.A.
Bartlett Tree Expert Company.
Residual Risk (see recommendations):
Tree Parts(s) of Concern: None
Condition Rating:Fair (53%)
ConsequencesLikelihood of Failure Likelihood of ImpactHealthStructureForm
Poor Fair Fair
Recommendations: Retain with protection. Consider Emerald Ash Borer (EAB)
preventative treatment.
Notes: EMERALD ASH BORRER VULNERABILITY CONSIDERATIONS. This tree is
growing within a narrow median planting strip and is surrounded by herbaceous ground
covers. An electrical outlet box is present within the planter and near the tree. The tree
exhibits diminished vigor throughout the canopy.
Page 57 of 60
UFS|BC ● City of Renton Market/Piazza Project ● ISA Level 2 Basic Assessment Matrix October 08, 2024
Tree ID:Dripline Ave. (r)Species:Green ash (Fraxinus pennsylvanica)Height15.6 inDBH/QMD:5855 ft 18 ftStems:1Risk Assessment Summary
Risk Assessment ComponentsRisk Rating: Low
Target(s):Assessment Time Frame: 3 years
This document has been
prepared specifically for the
above-named project and is
likely part of a larger set of
data. This sheet should be
used in conjunction with the
written report and should not
be used without the approval
and participation of the F.A.
Bartlett Tree Expert Company.
Residual Risk (see recommendations):
Tree Parts(s) of Concern: None
Condition Rating:Fair (53%)
ConsequencesLikelihood of Failure Likelihood of ImpactHealthStructureForm
Poor Fair Fair
Recommendations: Retain with protection. Consider Emerald Ash Borer (EAB)
preventative treatment.
Notes: EMERALD ASH BORRER VULNERABILITY CONSIDERATIONS. This tree is
growing within a narrow median planting strip and is surrounded by herbaceous ground
covers. An electrical outlet box is present within the planter and near the tree. The tree
exhibits diminished vigor throughout the canopy.
Page 58 of 60
UFS|BC ● City of Renton Market/Piazza Project ● ISA Level 2 Basic Assessment Matrix October 08, 2024
Tree ID:Dripline Ave. (r)Species:Green ash (Fraxinus pennsylvanica)Height10.4 inDBH/QMD:5955 ft 18 ftStems:1Risk Assessment Summary
Risk Assessment ComponentsRisk Rating: Low
Target(s):Assessment Time Frame: 3 years
This document has been
prepared specifically for the
above-named project and is
likely part of a larger set of
data. This sheet should be
used in conjunction with the
written report and should not
be used without the approval
and participation of the F.A.
Bartlett Tree Expert Company.
Residual Risk (see recommendations):
Tree Parts(s) of Concern: None
Condition Rating:Poor (46%)
ConsequencesLikelihood of Failure Likelihood of ImpactHealthStructureForm
Poor Poor Fair
Recommendations: Retain with protection. Consider Emerald Ash Borer (EAB)
preventative treatment.
Notes: EMERALD ASH BORRER VULNERABILITY CONSIDERATIONS. This tree is
growing within a narrow median planting strip and is surrounded by herbaceous ground
covers. An electrical outlet box is present within the planter and near the tree. The tree
exhibits diminished vigor throughout the canopy.
Page 59 of 60
UFS|BC ● City of Renton Market/Piazza Project ● ISA Level 2 Basic Assessment Matrix October 08, 2024
Tree ID:Dripline Ave. (r)Species:Green ash (Fraxinus pennsylvanica)Height12.8 inDBH/QMD:6055 ft 18 ftStems:1Risk Assessment Summary
Risk Assessment ComponentsRisk Rating: Low
Target(s):Assessment Time Frame: 3 years
This document has been
prepared specifically for the
above-named project and is
likely part of a larger set of
data. This sheet should be
used in conjunction with the
written report and should not
be used without the approval
and participation of the F.A.
Bartlett Tree Expert Company.
Residual Risk (see recommendations):
Tree Parts(s) of Concern: None
Condition Rating:Poor (46%)
ConsequencesLikelihood of Failure Likelihood of ImpactHealthStructureForm
Poor Poor Fair
Recommendations: Retain with protection. Consider Emerald Ash Borer (EAB)
preventative treatment.
Notes: EMERALD ASH BORRER VULNERABILITY CONSIDERATIONS. This tree is
growing within a narrow median planting strip and is surrounded by herbaceous ground
covers. An electrical outlet box is present within the planter and near the tree. The tree
exhibits diminished vigor throughout the canopy.
Page 60 of 60