Covering your aspen since 2006.

I know my way around a tree. But then again, most people do. What separates me from the pruners and climbers, however, is my experience across the gamut of tree care and arboricultural concerns.

I’m the expert—and expert witness—you call for any professional arborist service you need covered.

Tree Risk

There is always a certain level of risk that we take with having tree in and around our homes and properties. Trees are large, long lived woody perennial plants, that compartmentalize. Understanding their biology, structure, mechanics and life cycles that are specific to each individual species is paramount when looking into the long term health and wellness of a trees structure and form. There is no way for anyone to truly tell when a tree will fail or part of a tree will fail. However, there are specific skills, scientific techniques, and industry guidelines for informing a tree owner of the likelihood and consequences of a trees (or part of a tree) potential to fail.

Expert Information

As an ISA Board Certified Master Arborist (MW 4503B), Sam Kezar has the pinnacle certification relating to understanding trees. This has comes with years of both practical and educated experience into the science of tree dynamics, biology, and species specific growth patterns to provide that very detailed information in regards to tree risk and structural assessments.

What is Involved in a Tree Risk Assessment?

  • A visual inspection of the tree looking for a wide variety of structural and tree health cues.
  • Tree owner will be interviewed to gain valuable information on past site and tree history as well as to identify the potential targets and their value to the owner.
  • Aerial inspection either by climbing or drone may be necessary based on tree conditions, size, and potential severity of targets.
  • Dynamic testing may be performed to get an indication of how a tree deals with wind or other environmental forces.
  • Other testing may be prescribed as necessary based off initial visual and dynamic tests to gain further knowledge into the tree.
  • A final written report will be delivered to the owner or firm that hired the risk assessment. It will outline the following:
    • Likelihood of Tree (or tree part(s)) Failure.
      • Imminent, Probably, Possible, Improbable
    • Likelihood of Tree Impacting Target.
      • Unlikely, Somewhat Likely, Likely, Very Likely
    • Consequences of Failure
      • Low, Moderate, High, Extreme
    • Likelihood of Failure & Impact weighed against Consequences of Failure
    • Other factors such as occupancy rate of people in the trees target area are also taken into consideration.

Understanding the Results

The report is designed to give the tree owner the necessary scientific and professional assessment information so the owner can weigh that information with their inherent views of trees and the level of risk they are willing to be comfortable with.

It is company policy that we never tell a person what to do with their tree. The Risk assessment in only a method to provide an accurate and unbiased professional assessment into the health and structural integrity of the tree and its likelihood of failing and impacting a target.

A Tree Risk Assessment is only good for the assessment done on that day. Trees are constantly changing and growing so in certain instances, regular and consistent assessments and checkups may be required for higher risk trees. This will be discussed with the tree owner if necessary.