Basic Tree Risk Assessment Form

1 Trunk Crown and Branches Roots and Root Collar Unbalanced crown LCR _____% Dead twigs/branches ____% overall Max. dia. _____Broken/Hangers Number _____ Max. dia. _____Over-extended branches Pruning historyCrown cleaned Reduced Flush cuts Thinned Topped Other Raised Lion-tailed Cracks _____ Lightning damage Codominant _____ Included bark Weak attachments _____ Cavity/Nest hole ____% circ. Previous branch failures _____ Similar branches present Dead/Missing bark Cankers/Galls/Burls Sapwood damage/decay Conks Heartwood decay _____ Response growthCollar buried/Not visible Depth_____ Stem girdling Dead Decay Conks/Mushrooms Ooze Cavity _____% Cut/Damaged roots Distance from trunk _____Root plate lifting Soil weakness Response growthMain concern(s)Load on defect N/A Minor Moderate Significant Dead/Missing bark Abnormal bark texture/color Codominant stems Included bark Cracks Sapwood damage/decay Cankers/Galls/Burls Sap ooze Lightning damage Heartwood decay Conks/Mushrooms Cavity/Nest hole _____ % circ.

2 Depth _____ Poor taper Lean _____ Corrected? _____ Response growth Main concern(s) Load on defect N/A Minor Moderate Significant Client _____ Date _____ Time _____Address/ tree location _____Tree Sheet _____ of _____Tree species _____ dbh_____ Height _____ Crown spread dia. _____ Assessor(s) _____ Time frame_____ Tools used_____Target AssessmentTarget numberTarget description Practical to move target? Restriction practical?1234 History of failures _____ Topography Flat Slope _____% Aspect _____Site changes None Grade change Site clearing Changed soil hydrology Root cuts Describe _____Soil conditions Limited volume Saturated Shallow Compacted Pavement over roots _____% Describe _____Prevailing wind direction_____ Common weather Strong winds Ice Snow Heavy rain Describe _____Tree Health and Species Profile Vigor Low Normal High Foliage None (seasonal) None (dead)

3 Normal _____% Chlorotic _____% Necrotic _____% Pests_____ Abiotic _____ Species failure profile Branches Trunk Roots Describe _____Load Factors Wind exposure Protected Partial Full Wind funneling _____ Relative crown size Small Medium Large Crown density Sparse Normal Dense Interior branches Few Normal Dense Vines/Mistletoe/Moss _____ Recent or planned change in load factors _____Tree Defects and Conditions Affecting the Likelihood of FailureOccupancy rate1 rare 2 occasional 3 frequent 4 constantLikelihood of failureLikelihood of failureBasic tree Risk Assessment FormPage 1 of 2 Site FactorsTarget zone Target within drip line Ta rge t within 1x Ht.

4 Target within concern(s)Load on defect N/A Minor Moderate Significant Likelihood of failure Improbable Possible Probable Imminent Improbable Possible Probable Imminent Improbable Possible Probable Imminent 1 2 3 4 Matrix 1. Likelihood matrix. Likelihood of FailureLikelihood of Impacting TargetVery lowLowMediumHighImminentUnlikelySomewhat likelyLikelyVery likelyProbableUnlikelyUnlikelySomewhat likelyLikelyPossibleUnlikelyUnlikelyUnli kelySomewhat likelyImprobableUnlikelyUnlikelyUnlikely UnlikelyCondition numberPart sizeFall distanceTarget protectionConditions of concernFailureImpactFailure & Impact (from Matrix 1)LikelihoodImprobableImminentPossibleVe ry lowUnlikelyNegligibleMediumLikelySignifi cantProbableLowSomewhatMinorHighVery likelySevereConsequencesRisk rating of part (from Matrix 2)

5 tree partLikelihood of Failure & ImpactConsequences of Failure Negligible MinorSignificantSevereVery likelyLowModerateHighExtremeLikelyLowMod erateHighHighSomewhat likelyLowLowModerateModerateUnlikelyLowL owLowLow Data Final Preliminary Advanced Assessment needed No Yes-Type/Reason _____Inspection limitations None Visibility Access Vines Root collar buried Describe _____Notes, explanations, descriptionsMitigation options _____ Residual risk _____ Residual risk _____ Residual risk _____ Residual risk _____Overall tree risk rating Low Moderate High Extreme Work priority 1 2 3 4 Overall residual risk Low Moderate High Extreme Recommended inspection interval_____This datasheet was produced by the International Society of Arboriculture (ISA) and is intended for use by tree Risk Assessment Qualified (TRAQ) arborists 2013 NorthPage 2 of 2 Matrix 2.

6 Risk rating CategorizationTarget number