PLN2021-0057 Hazard tree evaluationCITY OF EDMONDS
121 5tn Avenue North, Edmonds WA 98020
Phone: 425.771.0220 • Fax: 425.771.0221 • Web: www.edmondswa.gov
DEVELOPMENT SERVICES DEPARTMENT • PLANNING DIVISION
"ne. I STJ
October 28, 2021
Gail Giroux
8727 Olympic View Drive
Edmonds, WA 98026
Subject: Hazard Tree Removal (PLN2021-0057)
Gail,
Thank you for reaching out regarding the cedar tree west of your house at 8727 Olympic View
Drive. The area where the tree is located is at the top of a steep slope which would be
classified as a potential erosion hazard area with more than a 25% slope, a type of
environmentally critical area.
Generally, the removal of trees or vegetation within a critical area or critical area buffer is not
an allowed activity unless it involves the removal of invasive species or hazard trees pursuant to
ECDC 23.40.220.C.8. Where pruning or crown thinning is not sufficient to address the hazard,
trees may be removed or converted to a wildlife snag. According to the photos and information
provided, the cedar is about 37.5" DSH and leaning over the driveway toward the house. It is a
candidate for converting to a 10' habitat snag as recommended in the arborist report dated
October 10, 2021, under mitigation options in the attached ISA Tree Risk Assessment Form.
A hazard tree cutting exemption is granted per ECDC 23.40.220.C.8.b with the following
conditions:
1. This review only applies to the cedar tree identified in the photos and materials.
2. The tree shall be converted to a 10' height wildlife habitat snag. The downed wood and
cuttings may be removed from the site, however, do not stump grind.
3. A minimum of two replacement trees must be planted in the general vicinity of the
cedar. Replacement trees must be species that are native and indigenous to the site and
a minimum of one to two inches in diameter at breast height (dbh) for deciduous trees
and a minimum of six feet in height for evergreen trees as measured from the top of the
root ball.
4. The replacement trees must be installed within one year of the removal of the cedar.
Please provide photos of each of the planted replacement trees to verify installation.
If you have any questions, please let me know at either michael.clugston@edmondswa.gov or
425-771-0220.
Sincerely,
Mike Clugston, AICP
Senior Planner
Enclosures
CITY OF EDMONDS MyBuildingPermit.com
Land Use Application #1034726 - Giroux home
Applicant
First Name Last Name Company Name
Gail Giroux
Number Street Apartment or Suite Number E-mail Address
8727 Olympic view drive gailgiroux@comcast.net
City State Zip Phone Number Extension
Edmonds WA 98026 4257128571
Contractor
Company Name
Number Street Apartment or Suite Number
City State Zip Phone Number Extension
State License Number License Expiration Date UBI # E-mail Address
Project Location
Number Street Floor Number Suite or Room Number
8727 OLYMPIC VIEW DR
City Zip Code County Parcel Number
EDMONDS 98026 00434600000401
Associated Building Permit Number Tenant Name
Additional Information (i.e. equipment location or special instructions)_
Work Location
Property Owner
First Name Last Name or Company Name
Edward & Gail Giroux
Number Street Apartment or Suite Number
8727 OLYMPIC VIEW DR
City State Zip
EDMONDS WA 98026
Certification Statement - The applicant states:
I certify that I am the owner of this property or the owner's authorized agent. If acting as an authorized agent, I further certify that I have full power and
authority to file this application and to perform, on behalf of the owner, all acts required to enable the jurisdiction to process and review such application. I
have furnished true and correct information. I will comply with all provisions of law and ordinance governing this type of application. If the scope of work
requires a licensed contractor to perform the work, the information will be provided prior to permit issuance.
Date Submitted: 10/13/2021 Submitted By: Gail Giroux
Page 1 of 2
i
CITY OF EDMONDS MyBuildingPermit.com
Land Use Application #1034726 - Giroux home
Project Contact
Company Name:
Name: Ed or Gail Giroux Email: gailgiroux@comcast.net
Address: 8727 Olympic view drive Phone #: 425-712-8571
Edmonds Wa 98026
Project Type Activity Type Scope of Work
New New Development Activity Project Approval
Project Name: Giroux home
Description of Work: To remove a cedar tree in my front yard that is leaning towards my home and if it
falls it will go thru the middle
Project Details
Development Type
Land Use
Page 2 of 2
MyBuildingPermit.com
Jurisdiction: Edmonds
Project Name: Giroux home
Application ID: 1034726
Supplemental Name: Land Use Application
If this is a new parcel or lot that does not yet have an address or a County tax account number, please describe the property and its location
(otherwise, you may skip this question):
Please describe the project and/or proposed use(s) you are seeking approval for with this application (you can upload a more detailed
file/letter later in the application, as necessary):
To remove a cedar tree (approx 40 -50') that is in my front yard and is leaning towards my home
Check the boxes indicating all of the related approvals you are seeking for this project (including this application). NOTE THAT A SEPARATE APPLICATION IS
REQUIRED FOR EACH APPROVAL.
Other (not listed)
Supplemental Name: Applicant Certification - Planning
The applicant, and his/her/its heirs, and assigns, in consideration on the processing of the application agrees to release, indemnify,
defend and hold the City of Edmonds harmless from any and all damages, including reasonable attorney's fees, arising from any
action or infraction based in whole or part upon false, misleading, inaccurate or incomplete information furnished by the applicant,
his/her/its agents or employees. The property affected by the application is in the exclusive ownership of the applicant or that the
application has been submitted with the consent of all owners of the affected property.
I certify, under the penalty of perjury under the laws of the State of Washington, that the information and exhibits herewith submitted
are true and correct to the best of my knowledge and that I am authorized to file this application on behalf of the owner of the subject
property.
I do so certify.
ABC Herron Tree LLC
P.O. Box 64
j Gold Bar, WA 98251
425-293-2443
� �,'�.W' mountainredd@comcast.net
Certified Tree Risk Assessor (TRAQ)
Journeyman Tree Trimmer
® ISA certified Arborist PN-6967A
October 10, 2021
Edward & Gail Giroux
8727 Olympic View Dr
Edmonds, WA 98026
RE: 8727 Olympic View Dr, Edmonds, WA 98026
Parcel00434600000401
Lot Size — .69 sq acres
Dear Mr. and Mrs. Giroux,
ABC Herron Tree LLC is pleased to submit this report compiling the Visual Tree Risk and Evaluation
Assessment performed on one tree located on Parcel 00434600000401 at 8727 Olympic View Dr,
Edmonds.
Visual Tree Assessments is an outlined process in accordance with TRAQ (Tree Risk Assessment
Qualification) program and is a recognized standard of care by the ISA International Society of
Arboriculture to evaluate tree health and risk. All tree assessments were made with a level 2 inspection.
Our services were required as per our agreement on October 10, 2021. This report is good for a one-
year time frame from date of report.
I have included a detailed report of my findings below. Please feel free to contact me with any questions
you may have.
Yours,
dL� ��iti2,d/v
Cody Herron
Page 2 of 9
8727 Olympic View Dr, Edmonds
Contents:
• Assignment
• Personal qualifications, scope of work and methodology
• Methods used to determine tree location and tree health
• GPS Coordinates
• Site Plan
• Tree Assessment Matrix
• Discussion and conclusion
• References
• Waiver of Liability
Attachment:
• Basic Tree Risk Assessment Form for (1) tree
Assignment
On October 10, 20211 was asked to complete a tree evaluation regarding one tree located on
parcel 00434600000401 at 8727 Olympic View Dr, Edmonds per the Snohomish County
Assessor. This report is valid for a one-year time frame.
Personal qualifications, scope of work and methodology:
The knowledge I used to evaluate the trees comes from over 20 years of experience in the tree
care industry, including two years of schooling from South Seattle Community College. I am a
recognized Journeyman Tree trimmer through IBEW with 12 years of experience (International
Brotherhood Electrical Workers). I also have 10 years' experience as an ISA certified arborist,
including six years working for Snohomish County PUD as an arborist I am also currently
employed by King County as a Vegetation Specialist Arborist for the DOT. In addition, I have
worked for Seattle City Light and Washington Department of Transportation in performing tree
maintenance, mitigation and noxious weed control. In addition to my experience and ISA
certification maintained and in good standing, I am also TRAQ certified (Tree Risk Assessment
Qualified). I have relied on my training in these areas to perform the duties outlined.
I followed the protocol delineated by the International Society of Arboriculture (ISA) for Level 2
Visual Assessment Process. By doing so I am examining each tree independently as well as
collectively as groups or stands of trees provide stability and can lower risk of independent tree
failure. This scientific process examines tree health (e.g., size, vigor, and insect and disease
process) as well as site condition (soil, conditions nursery stumps, anaerobic conditions,
compaction etc.).
Cody Herron ABC Herron Tree LLC 425-293-2443
ISA Certified Arborist #PN-6967A Certified Tree Risk Assessor mountainredd@comcast.net
Page 3 of 9
8727 Olympic View Dr, Edmonds
A key part of tree risk assessment is to categorize the likelihood of failure, of one or more
branches, the stem, or the roots. Visual assessment includes looking for and determining the
significance of the defects and structural conditions. Some structural defects or conditions are
more likely to lead to failure than others. Individual defects or conditions may not by
themselves indicate a serious structural problem, but in combination with other conditions they
may contribute to failure.
All tree species have widely varying lifespans and tolerance capabilities to wound healing from
damage caused by biotic and abiotic forces. Knowledge of failure patterns (Disease, lifespan,
environmental conditions and species characteristics) associated with different species is
critical in making effective reports.
Methods used to determine tree location and tree health:
Tree diameter was measured with forester's tape. Tree dripline and height were measured with
a Nikon Pro laser range finder or tape. Tree is tagged with Dymo Rhino aluminum numerical
impression labels and pink ribbon. All measurements and notes are recorded in digital
formatting on site. An iPad Generation 7 is used to record the data and pictures to help
illustrate the findings.
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17.4
PRO TAPE
w.oufTUM MAN
GPS Locations (approximate):
Note: please note these coordinates are for vague and loose approximate reference and visual aid only.
This should not be considered to be taken as part of a formal, official survey of the property.
Tree# Species Latitude Longitude
Western red cedar 47.83585985146628-122.35204130919266
Cody Herron ABC Herron Tree LLC 425-293-2443
ISA Certified Arborist #PN-6967A Certified Tree Risk Assessor mountainredd@comcast.net
Site Map
502'
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`� dot. A•Y.' .t
01
Page 4 of 9
8727 Olympic View Dr, Edmonds
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Page 5 of 9
8727 Olympic View Dr, Edmonds
Cody Herron
Tree Assessment Matrix
TRAQ Certified Arborist
ABC HCRROiV THF1. PN 6967A
Tree Species DBH on) I Drip at) I cRz on I condition I Structure Risk Pros. Value Recommendations
1 western red cedar 37.5 1 15.0 1 37.5 3 fair 2 Poor High 3 Tree Removal
Tlwla pticata
w This tree has a heavy lean t(mards the north directly over the top of the house. The lean of this tree is mostly uncorrected and directly over the house.This is a lone tree with zero wind buffer. Tree
U „ II be more susceptible to wind throw. Removal of this tree is recommended following any mrtgation requirements Laid out by the city.
o ci
zo
City of Edmonds GIS Map
— Q Critical Areas
Q = Creeks >
Q ® Seismic Hazard Areas >
Q Earth Subsidence and
Landslide Area
Q r j Minimum Buffer
Adjacent to Hazard
Q Wetlands >
Q ; _ Wetlands Boundary >
Q ; _ Floodplains >
Q Landslide and Erosion c -.
Ha7arri
Layers
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00
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00
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Page 6 of 9
8727 Olympic View Dr, Edmonds
6
OLYMPIC VIEW DI
Cody Herron ABC Herron Tree LLC 425-293-2443
ISA Certified Arborist #PN-6967A Certified Tree Risk Assessor mountainredd@comcast.net
Page 7 of 9
8727 Olympic View Dr, Edmonds
Discussion and Conclusion
I arrived on site at about 9:00 am on October 10 2021.
Per the City of Edmonds GIS Map shown on the previous page this Tree #1 appears to be
located in a critical area. Per Edmonds City Code and Community Development Code (ECDC)
23.40.220.C.8.b
"b. The removal of trees from critical areas and buffers that are hazardous, posing a
threat to public safety, or posing an imminent risk of damage to private property;
provided, that:
i. The applicant submits a report from an ISA- or ASCA-certified arborist or
registered landscape architect that documents the hazard and provides a
replanting schedule for the replacement trees;
ii. Tree cutting shall be limited to pruning and crown thinning, unless otherwise
justified by a qualified professional. Where pruning or crown thinning is not
sufficient to address the hazard, trees should be removed or converted to
wildlife snags;
iii. All vegetation cut (tree stems, branches, etc.) shall be left within the critical
area or buffer unless removal is warranted due to the potential for disease or
pest transmittal to other healthy vegetation or unless removal is warranted to
improve slope stability;
iv. The land owner shall replace any trees that are removed with new trees at a
ratio of two replacement trees for each tree removed (2:1) within one year in
accordance with an approved restoration plan. Replacement trees may be
planted at a different, nearby location if it can be determined that planting in
the same location would create a new hazard or potentially damage the critical
area. Replacement trees shall be species that are native and indigenous to the
site and a minimum of one to two inches in diameter at breast height (DBH) for
deciduous trees and a minimum of six feet in height for evergreen trees as
measured from the top of the root ball;"
This tree does not show any evidence of providing critical habitat to birds or other animals. My
recommendation is for the removal of this tree as it poses a threat to public safety and damage
to private property. I do not recommend leaving cut branches, vegetation or wood. This is an
urban area near other residential properties, and leaving the debris would not only create an
eyesore but this practice is discouraged by the Washington State Department of Natural
Resources and fire departments throughout western Washington since having dry, dead brush
and branches near structures creates an increased risk for fires damaging private property.
Page 8 of 9
8727 Olympic View Dr, Edmonds
(see https://www.dnr.wa.gov/firewise or https://www.mercerisland.gov/fire/page/wildfire-
prevention-and-fire-safety for examples).
Replanting Schedule
Per ECDC 23.40.220.C.8.b this tree will need to be replaced onsite at a 2:1 ratio with native
species. Per Edmonds City Code 23.10.080 replacements must be at least 1-2" DBH for
deciduous trees or a minimum of six feet in height for evergreen trees. Storm Lake Growers has
an excellent selection of native trees http://stormlakegrowers.com/ . These trees will be
planted on this parcel within one year of the removal.
References
ANSI A300 (Pat 1) — 2008 American National Standards Institute. American National standard
for Tree Care Operations: Tree, Shrub and Other Woody Plant Maintenance: Standard Practices
(Pruning). New yok: Tree Care Industry Association, 2008. Coder, Dr. Kim D. Construction
Damage Assessments: Tree and Sites. University of Georgia. October 1996. Ashley, Burl S. 1980
Reference handbook for foresters. USDA NA-FR-15. 35 pp. Dirr, Michael A. Manual of Woody
Landscape Plants, Their Identification, Ornamental Characteristics, Culture, Propagation, and
Uses. Champaign: Stipes Publishing Company, 1990. Dunster & Associates Environmental
Consultants Ltd. Assessing Trees in Urban Areas and the Urban- Rural Interface. US Release 1.0.
Silverton: Pacific Northwest Chapter ISA, 2006. Dunster, J. A. 2003. Preliminary Species Profiles
for Tree Failure Assessment. Bowen Island: Dunster & Associates Environmental Consultants
Ltd. Dunster, Julian A., E. Thomas Smiley, Nelda Matheny and Sharon Lilly. Tree Risk Assessment
Manual. Champaign, Illinois: International Society of Arboriculture, 2013. Harris, Richard W,
James Clark, and Nelda Matheny. Arboriculture, Integrated Management of Landscape Trees,
Shrubs, and Vines. 4th ed. Upper Saddle River: Prentice Hall, 2004. Lilly, Sharon. Arborists'
Certification Study Guide. Champaign, IL: The International Society of Arboriculture, 2001.
Matheny, Nelda and Clark, James R. A Photographic Guide to the Evaluation of Hazard Trees in
Urban Areas. Second Edition. Champaign, IL: The International Society of Arboriculture, 1994.
Matheny, Nelda and Clark, James R. Trees and Development: A Technical Guide to Preservation
of Trees during Land Development. Champaign, IL: The International Society of Arboriculture,
1998. Mattheck, Claus and Breloer, Helge. The Body Language of Trees: A Handbook for Failure
Analysis. London: HMSO, 1994 Schwarze, Francis W.M.R. Diagnosis and Prognosis of the
Development of Wood Decay in Urban Trees. Australia: ENSPEC Pty Ltd. 2008 Sinclair, Wayne
A., Lyon, Howard H., and Johnson, Warren T. Diseases of Trees and Shrubs. Ithaca, New York:
Cornell University Press, 1987.Prince, Susan Duvall Visual Tree Assessment Feb 2018. Smiley, E.
Thomas, Nelda Matheny, and Sharon Lilly, Tree Risk Assessment Best Management Practices,
ANSI A300 Part 9: Tree, Shrub, and Other Woody Plant Management— Standard Practices (Tree
Risk Assessment: Tree Structure Assessment). The International Society of Arboriculture Press.
Champaign. IL. 2011. Thies, Walter G. and Sturrock, Rona N. Laminated root rot in Western
North American. United States Department of Agriculture. Pacific Northwest. Resource Bulletin
PNW-GTR-349. April 1999
Cody Herron ABC Herron Tree LLC 425-293-2443
ISA Certified Arborist #PN-6967A Certified Tree Risk Assessor mountainredd@comcast.net
Page 9 of 9
8727 Olympic View Dr, Edmonds
Waiver of Liability
There are many conditions affection a tree's health and stability, which may be present and cannot be
ascertained, such as, root rot, previous or unexposed construction damage, internal cracks, stem rot and
more which may be hidden. Changes in circumstances and conditions can also cause a rapid
deterioration of a trees' health and stability. Adverse amount of time. While I have used every
reasonable means to examine these trees, this evaluation represents my opinion of the tree health at
this point in time. These findings do not guarantee future safety nor are they predictions of future
events.
Any legal description provided to the consultant -appraiser is assumed to be correct. Any titles and
ownerships to any property are assumed to be good and marketable. No responsibility is assumed for
matter legal in character. Any and all property is appraised or evaluated as though free and clear, under
responsible ownership and competent management the tree evaluation consists of an external visual
inspection of an individual tree's root flare, trunk, and canopy from the ground. Care has been taken to
obtain all information from reliable sources. All data has been verified insofar as possible; however, the
consultant/appraiser can neither guarantee nor be responsible for the accuracy of information provided
by others.
Sketches, maps, diagrams, graphs and photographs in this report, being intended as visual aid, are not
necessarily to scale and should not be construed as engineering or architectural reports or survey.
As conditions change, it is the responsibility of the property owners to schedule additional site visits by
the necessary professionals to ensure that the long-term success of the project is insured. It is the
responsibility of the property owner to obtain all required permits form city, county state, for federal
agencies. It is the responsibility of the property owner to comply with all applicable laws, regulations,
and permit conditions. If there is a homeowner's association, it is the responsibility of the property
owner to comply with all Codes, Covenants, and Restrictions (CC&R's) that apply to tree pruning and
tree removal.
This tree evaluation is to be used to inform and guide the client in the management of their trees. This in
no way implies that the evaluator is responsible for performing recommended actions or using other
methods or tools to further determine the extent of internal tree problems without written
authorizations from the client. Furthermore, the evaluator in no way holds that the opinions and
recommendations are the only actions required to ensure that the tree will not fail. A second opinion is
recommended. The client shall hold the evaluator harmless for any and all injuries of damages incurred
if the evaluator's recommendations are not followed of for acts of nature beyond the evaluator's
reasonable expectations, such as severer winds, excessive rains, heavy snow loads, etc.
The consultant/appraiser shall not be required to give testimony or to attend court by reason of the
report unless subsequent contractual arrangements are made including payment of an additional fee for
such services as described in the fee schedule and contract of engagement
This report and all attachments, enclosures, and references, are confidential and are for the use of the
client concerned. Loss or alteration of any part of this report invalidates the entire report. They may not
be reproduced, used in any way of dispersed in any form without the prior consent of the client
concerned and ABC Herron Tree LLC. This report constitutes a whole. No single piece of part can be used
without the entire text. Any use or restricted copying nullifies the entire report.
Cody Herron ABC Herron Tree LLC 425-293-2443
ISA Certified Arborist #PN-6967A Certified Tree Risk Assessor mountainredd@comcast.net
Risk Assessment Form
ISA. Basic Tree
Client Edward & Gail Giroux
Address/Tree location 8727 Olympic View Dr Edmonds WA 98026
Tree species Western Cedar Thuja plicata
Assessor(s) Cody Herron PN 6967A
Date 10/10/2021
Tree no
dbh 37.5 Height 75'
Time frame 1 Year Tools use
Target Assessment
Time 9:00arr
Sheet 1
_ Crown spread dia. _
Tape/Rangefinder/I pad
25'
of 2
Target zone
Occupancy
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3
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2
rate
1—rare
m
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Target description
d a
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u1
z—occasional
F W
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F 1Z
ai
—frequent3
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4—costant
a` E
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1
House
✓
4
N
N
2
Driveway (parked vehicles)
✓
4
N
N
3
4
Site Factors
History of failures Some insignificant limbs Topography Flat❑ Slope[j] 20 % Aspect SW
Site changes None 0 Grade change ❑ Site clearing❑ Changed soil hydrology❑ Root cuts❑ Describe None
Soil conditions Limited volume ❑ Saturated ❑ Shallow Compacted 0 Pavement over roots ❑ 20 % Describe Paved driveway
Prevailing wind direction SW Common weather Strong winds 0 Ice ❑ Snow ❑ Heavy rain ❑ Describe Strong winter winds
Tree Health and Species Profile
Vigor Low ❑ Normal 0 High ❑ Foliage None (seasonal) ❑ None (dead) ❑ Normal 95 % Chlorotic 0 % Necrotic 5 %
Pests None observed Abiotic _..
Species failure profile Branches ❑ Trunk 0 Roots 0 Describe Windthrnw of traps ni,tsirip of nrnvp nrntantinns
Load Factors
Wind exposure Protected ❑ Partial ❑ Full 0 Wind funneling❑ Relative crown size Small ❑ Medium ❑ Large 0
Crown density Sparse[] Normal0 Dense❑ Interior branches FewO Normal❑ Dense❑ Vines/Mistletoe/Moss ❑ None
Recent or planned change in load factors None
Tree Defects and Conditions Affecting the Likelihood of Failure
— Crown and Branches —
Unbalanced crown 0 LCR 0 % Cracks ❑ None Lightning damage ❑
Dead twigs/branches 0 5 %overall Max. dia. Codominant ❑ None Included bark ❑
Broken/Hangers Number 0 Max. dia. 0
Weak attachments ❑ None Cavity/Nest hole n % circ.
Over -extended branches ❑
Pruning history several insi
Previous branch failures 0 g Similar branches present ❑
Crown cleaned ❑ Thinned ❑ Raised IN Dead/Missing bark ❑ Cankers/Galls/Burls ❑ Sapwood damage/decay ❑
Reduced ❑ Topped ❑ Lion -tailed 0 Conks ❑ Heartwood decay ❑
Flush cuts 0 Other Response growth ^'^^-
Main concern(s) Tree has heavy uncorrected lean towards house and is a standalone tree with little wind buffer. The crown has
Load on defect N/A ❑ Minor ❑ Moderate 0 Significant ❑
Likelihood of failure Improbable ❑ Possible 0 Probable ❑ Imminent ❑
—Trunk — — Roots and Root Collar —
Dead/Missing bark ❑ Abnormal bark texture/color ❑ Collar buried/Not visible ❑ Depth 0 Stem girdling ❑
Codominant stems ❑ Included bark ❑ Cracks ❑ Dead ❑ Decay ❑ Conks/Mushrooms ❑
Sapwood damage/decay ❑ Cankers/Galls/Burls ❑ Sap ooze ❑ Ooze ❑ Cavity ❑ 0 % circ.
Lightning damage ❑ Heartwood decay Conks/Mushrooms ❑ Cracks ❑ Cut/Damaged roots ❑ Distance from trunk 0
Cavity/Nest hole 0 % circ. Depth Poor taper 0 Root plate lifting ❑ Soil weakness ❑
Lean 45 ° Corrected? No
Response growth None Response growth None
Main concern(s) Tree has heavy lean towards house with no Main concern(s) None
wind buffer protections and is lion tailed.
Load on defect N/A ❑ Minor ❑ Moderate ❑ Significant 0 Load on defect N/A ❑ Minor ❑ Moderate ❑ Significant 0
Likelihood of failure Likelihood of failure
Improbable ❑ Possible ❑ Probable 0 Imminent ❑ Improbable ❑ Possible 0 Probable ❑ Imminent ❑
Page I of 2
Risk Categorization
Likelihood
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Consequences
Failure
Impact
Failure & Impact
(from Matrix 1)
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Matrix 2)
Trunk
Tree has heavy
37"
75'
1
None
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1
lean towards house
and is lion tailed
37"
75'
2
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with no wind buffer.
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Matrix I. Likelihood matrix.
Likelihood
of Failure
Likelihood of Impacting Target
Very low
Low
Medium
High
Imminent
Unlikely
Somewhat likely
Likely
Very likely
Probable
Unlikely
Unlikely
Somewhat likely
Likely
Possible
Unlikely
Unlikely
Unlikely
Somewhat likely
Improbable
Unlikely
Unlikely
Unlikely
Unlikely
Matrix2. Risk rating matrix.
Likelihood of
Failure & Impact
Consequences of Failure
Negligible
Minor
Significant
Severe
Very likely
Low
Moderate
High
Extreme
Likely
Low
Moderate
High
High
Somewhat likely
Low
Low
Moderate
Moderate
Unlikely
Low
Low
Low
Low
Notes, explanations, descriptions Tree has a heavy uncorrected lean
towards house and driveway. There is no wind buffer protection in this
area and tree viability is questionable for windthrow. This tree is looks
to be inside of a critical slope area buffer. Removal of this tree is
recomended with replanting at 2:1 ratio following city guidlines.
Mitigation options Remove tree and replant to city guide lines leave a 10' habitat stub and do not stump grind.
Replant trees to city code and spec.
North
Residual risk Low
Residual risk
Residual risk
Residual risk
Overall tree risk rating Low ❑ Moderate ❑ High 0 Extreme ❑ Work priority 1 ❑ 2 0 3 ❑ 4 ❑
Overall residual risk Low IS Moderate ❑ High ❑ Extreme ❑ Recommended inspection interval None
Data 0 Final ❑ Preliminary Advanced assessment needed ONo ❑Yes-Type/Reason Level II inspection performed
Inspection limitations ONone ❑Visibility ❑Access ❑Vines ❑Root collar buried Describe None
This datasheet was produced by the International Society of Arboriculture (ISA) and is intended for use by Tree Risk Assessment Qualified (TRAQ) arborists — 2013
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