Information

  • Site

  • Inspection date

  • Tree location
  • Prepared by

  • Document Number

  • Minimal tree inspection required (if yes do not fill out the Detailed Hazardous Tree Inspection part) Then sign last page.

  • Describe what action is required or have undertaken.

Detailed Hazardous Tree Inspection

Tree Characterics

  • Tree species

  • Number of trunks

  • Diameter at chest height (DBH) in mm

  • Height in meters

  • Average Spread of Crown in meters

  • Tree Form

  • Crown class

  • Percent of live growth within the crown (LCR)

  • Age class

  • Evidence of previous pruning history

Tree Health

  • What is the general foliage colour

  • Foliage density

  • Tree Vigor

  • Twig and branch dieback present

  • Epicormic growth

  • Woundwood development

  • Major pests/diseases visible (includes fungal growth and or termite activity)

Site conditions

  • Has the site any recent site disturbance

  • Describe disturbance

  • Pavement lifted (including bitumen, concrete and or gravel tracks roads)

  • Percentage of tree dripline paved

  • Exposure to winds

Target (where people, vehicles and or park assets are within the reach of the tree)

  • Are there targets within 1.5 x height of tree

  • Describe targets

  • Can the target be moved

  • Can use be restricted within the target area.

  • Occupancy exposure time

Tree Defect within the Crown and Branches

  • Unbalanced crown

  • Live crown ratio in % (LCR)

  • Dead twigs /branches % overall

  • Over extended branches

  • Cracks within branches

  • Codominant branches

  • Weak attachments

  • Other areas of concern (fungal growth lightning strike etc)

Tree Defects on the Trunk

  • Dead missing bark

  • Codominant trunks

  • Included bark

  • Cracks

  • Cankers / Galls / Burls

  • Lean degrees from vertical

  • Lean severity

  • Other areas of concern (fungal growth lightning strike etc)

Tree Defects within the Roots and Root Collar

  • Fungal growth present

  • Dead or decaying roots

  • Exposed cut or damaged roots

  • Root plate lifting

  • Soil weakness cracking

  • Other areas of concern (undercutting of roots)

Hazard Rating

  • Inspection period

  • Tree part most likely to fail

  • Failure potiential

  • Size of tree or part likely to fail

Risk Calculators

  • Determine.JPG
  • Determine the likelihood of a hazardous tree injuring a person/s, damaging vehicle/s and or park assets

  • Qualitative measure of consequence or impact.JPG
  • Determine the level of risk to persons, vehicles and or park assets.

  • Risk rating matrix - Level of risk

    Risk rating matrix.JPG
  • Hazard rating as per risk rating matrix

Recommendations

  • Further inspection by consultant arborist required

  • Reason for consultant arborist to assist in the evaluation of the tree

  • Do you recommend removing the tree

  • Recommend replacing the tree

  • Recommend moving target/s

  • Comments

  • Signature

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