IS/. Basic Tree Risk Assessment Form
175 avenswood 11:00
Client _ 0|2/22/23 Time
Address/ Tree location Sheet . of.
Tree species Qvenus agnitila abh 3 6 Height Crown spread dia.
Tools used Time frame
Assors Sally Bentz-Dalton
Target Assessment
Target zone
Occupancy
rate
Target number Target description Target protection 1-rare Target within 1 x Ht. Target within 1.5 x Ht. 2 - occasional Practical to move target? Restriction.- practical? 3 - frequent
4- constant
Cars + popes Caß + - street
2 From school N
4 Site Factors
History of failures 2 lImbs Topography Flat Slope_ % Aspect Site changes Noned Grade change site clearing Changed soil hydrology Rot cursE Descrbe.
Soil conditions Limited volumeD Saturated • Shallow • Compacted I Pavement over rootst % Describe _ Prevailing wind direction Common weather Strong winds • Ice • Snow • Heavy rain • Describe Tree Health and Species Profile
Vigor Low • Normal Foliage None (seasonal) • None (dead) • Normal .% Chlorotic _ % Necrotic _ .% Pests/Biotic_a/t Abiotic
Species failure profile Branches • Trunk• Roots• Describe.
Load Factors
Wind exposure Protected • Partial• Full• Wind funneling•_ Relative crown size Small• Medium • Large C Crown density Sparse • Normal• Dense• Interior branches Few Normal A | Dense • Vines/Mistletoe/Moss O Recent or expected change in load factors
Tree Defects and Conditions Affecting the Likelihood of Failure — Crown and Branches -
Unbalanced crown D LCR % Cracks • Lightning damage O
Dead twigs/branches O % overall Max. dia. Codominant O Included bark • Broken/Hangers Number. Max. dia. Weak attachments • Cavity/Nest hole 2% circ.
Over-extended branches
Previous branch failures A yes - Similar branches present O Pruning history
Dead/Missing bark • Cankers/Galls/Burls • Sapwood damage/decay O Crown cleaned Thinned Raised
Reduced Topped Conks • Heartwood decay D
Lion-tailed
Flush cuts Response growth
condition (s) of concern fAt- by cars nine anetstrat
h04
Part Size Fall Distance Part Size Fall Distance
Load on defect N/A O Minor • Moderate• Significant • Load on defect N/A D • Moderate• Significant D Likelihood of failure Improbable • Possible • Probable • Imminent O Likelihood of failure Improbable • Possible • Probable • Imminent O — Trunk - - Roots and Root Collar -
Dead/Missing bark • Abnormal bark texture/color • Collar buried/Not visible O Depth Stem girdling O Codominant stems • Included bark O Cracks A Dead • Decay O Conks/Mushrooms O Sapwood damage/decay. Cankers/Galls/Burls O Sap ooze IK Ooze Cavity O % circ.
Lightning damage U Heartwood decay Conks/Mushrooms O Cracks • Cut/Damaged roots O Distance from trunk Cavity/Nest hole 5 % circ. Depth Poor taper O
Root plate lifting O Soil weakness D
Lean YeS corrected? nu
Response growth
• Condition (s) of concern
Fall Distance
Load on defect N/A O Moderate O Significant O Load on defect N/A D Minor • Moderate• Significant O Likelihood of failure Improbable• Possible • Probable • Imminent • Likelihood of failure Improbable• Possible • Probable • Imminent O Page I of 2
Risk Categorization
Likelihood
Failure & Impact Consequences
Failure Impact
Target (from Matrix 1)
Condition(s)
(Target number Tree part
of concern Risk
or description)
Improbable Somewhat Very likely Significant rating
Possible Probable Imminent Very low Medium Unlikely Negligible Likely Minor Severe (from
High
Matrix 2)
cars Thuk Decay mod
People X Mud
Matrix I. Likelihood matrix.
Likelihood Likelihood of Impact
of Failure 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
Matrix 2. Risk rating matrix.
Likelihood of Consequences of Failure
Failure & Impact Negligible Minor Significant Severe
Very likely Low Moderate High Extreme
Likely Low Moderate High High
Somewhat likely Low Low Moderate Moderate North
Unlikely Low Low Low Low
Nas, explanations, descriptions JLC
(aNS
Mean
Mitigation options
1. Residual risk
2._ Residual risk
3._ Residual risk
4._ Residual risk
Overall tree risk rating Low • Modera " High O Extreme D Overall residual risk None O Low O Moderate D High • Extreme D Recommended inspection interval _ Data •Final • Preliminary Advanced assessment needed •No DYes-Type/Reason Inspection limitations None Visibility Access •Vines Root collar buried Describe This datasheet was produced by the International Society of Arboriculture (ISA) - 2017 Page 2 of 2