Why Trees Stand Up and Fall Down
Joe Samnik
Consulting Forensic Arborist with 59 Years' Experience | Named as expert witness in over 1,000 litigated cases | Litigation support | Wrongful death and personal injury valuations
After the hustle and bustle of determining legal positioning in a wrongful death or personal injury matter regarding tree failures, this question inevitably comes: Why did this tree fail??Could the failure have been predicted within a reasonable amount of certainty before the incident occurred??Were the defects open and obvious??Were the defects irreparable??
Extraordinarily little is known of trees and their function. We are discovering and learning.?There is a small contingency of credentialed professionals who manage risk and tree failures.?They proudly publish their TRAQ credential (Tree Risk Assessment Qualified).?But can they predict failure??In some cases, the defects are open and obvious, and failure can be prevented or at least managed.?In other scenarios, such is not the case. Thus, the conflict of opposing opinions raised by plaintiff versus defendant regarding the condition of the tree in the before situation of failure.
As the search for truth unfolds battle lines regarding a failed tree, defenses and offenses form.?These attacks and defenses have a common thread associated with the claim.?One of the most common defenses is to claim that an Act of God caused the failure, in part or in whole, of the subject tree.?But there are limitations to the Act of God defense.?An attorney is the best source of knowledge and conduct for these limitations and the subject matter as applied and interpreted by legal knowledge.
Acts of God
A touchstone for those defending a failed tree certainly include Acts of God.?If there is any type of weather event, an Act of God defense is often initiated.?An event may be considered an Act of God when it is occasioned exclusively by the violence of nature, the sole proximate cause of the event for which liability is sought to be disclaimed.?However, it seems when an Act of God combines or concurs with the negligence of the defendant to produce an injury, the defendant is liable if the injury would not have resulted but for his or her own negligent conduct or omission. An Act of God is not only one that causes damage but also one in which reasonable precautions, or the exercise of reasonable care, by the defendant could not have prevented the damage from the natural event. The human charged with the care of the tree must have exercised due care prior to the intervention of the Act of God claim.
Insurance companies are becoming keenly aware that a weather event that is being blamed on liability circumstances may well have been preventable with the initiation of due care, even if the weather event was extraordinary.?
A subject tree whose limb failed and hurt or killed someone during 75-mile-per-hour winds may have had a preexisting condition that was open and obvious before the weather event occurred.?While it might be successfully argued that the limb would have failed on a calm day,?the weather may have contributed to the failure but was not the proximate cause.
Asserting an Act of God defense may be problematic if a close analysis of the structure and health of the subject tree was not analyzed in the after situation of the weather event. Photographs are another source of knowledge regarding the before situation condition rating of the subject failed tree.?
In matters where there are more people and fewer trees, the duty to inspect these subject trees rises exponentially as the number of people frequent the footprint of failure of any of the subject trees.
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When inspecting trees for due diligence purposes, strongly consider retaining a qualified arborist or other qualified professional to do so.?While the TRAQ credential should be a prerequisite for consideration of the professional who will be inspecting your trees, it must be remembered that little is known regarding the mechanics of tree failure.?A trained professional will, however, identify open and obvious defects that might be able to be remedied, repaired, or cured.
The International Society of Arboriculture (ISA) has a website that will enable you to locate those members who may be qualified to assist you in tree risk analysis.?Another organization, the American Society of Consulting Arborists (ASCA) is another excellent source to provide you with qualified professionals who can conduct a tree-risk analysis.
I do wish you well, and a safe and prosperous future.?Any questions which you may post will be promptly replied to.
#landscape #treefailure #consultingforensicarborist
As a Consulting Forensic Arborist with 55+ years of experience, I serve as an expert witness in the areas of trees, landscapes, and related “Green Industry” matters.
I have been accepted as an expert witness in nearly 1,000 matters in small claims, civil, federal, criminal, and eminent domain courts of law.
My opinion has never been stricken or restricted.
ISA Board Certified Master Arborist, ISA TRAQ, Arboricultural Consultant, Risk Assessor, Lecturer, Trainer, Author
3 年Well said.
Maximizing the Benefits of Urban Trees through Management, Science, and Education
3 年Excelent explanation as usual Joe! Your honest and straight forward delivery is a credit to our profession.
Arborist, Researcher, Witness at Historic Tree Care
3 年Tree Inspection Procedures, from ANSI A300 Part 8 and Germany’s ZTV ? “83.3.4??Inspection should include…: Conditions in the crown that may reflect root conditions; Stem tissue connecting the crown and the roots;?vitality, tipping and breaking safety. Girdling of buttress roots or stems by roots or foreign objects, and the tree’s response; Tree association with beneficial and harmful insects; Tree association with pathogenic and beneficial microorganisms (e.g. mycorrhizae); Wounds, and the tree’s response to wounds; Mechanical damage to detectable roots, and response; Indications of root disease and response…”?soil aeration , moisture and nutrients. ? “Mulch, soil and foreign material should be removed as needed to allow inspection.” Bark tracing of wounds shall remove only dead, loose, and damaged tissue.” Evaluate decay, callus and woundwood growth, and response growth in trunk and crown.”?Investigation produces explicit and exhaustive specifications.
Owner, Branch Management Tree Care ISA Certified Arborist # Fl -0471
3 年Great points !!!Joe , after 40+ years in this business I’ve seen many failures particularly in Laurel Oaks.Someone once told me that mother nature designed these trees to be a forest tree in a forest setting in groups?. Poor structure/codominant stems are common with this species .I feel they should never be be planted as a standalone tree?. Periods of drought followed by periods of heavy rain put undue stress at these points of limb attachment ?leading to failures?. My position has evolved from being a savior of trees to a savior of human life and property?. Yes we can do crown reduction alleviate stress at potential failure points points?. Yes we can install cables. The simple fact is it’s a living growing thing and those who do not study the past are doomed to repeat it??. Sometimes it’s just time to let go ,then it boils down to financial issues some folks just simply cannot afford to remove large trees. ?All we can do is make it known current conditions exist they could lead to failures?.
Dunster & Associates Ltd. North American Distributor for Rinntech Products. Author of Trees and the Law in Canada.
3 年In Canada at least an Act of God has very specific definition and is unlikely to be valid in most urban areas. The UK case Transco Plc v. Stockport Metropolitan Borough Council [2003] UKHL 61 (19 November 2003) is often cited as a good place to start. "...?an Act of?God was summarized as one:? (i) which involves no human agency (ii) which is not realistically possible to guard against (iii) which is due directly and exclusively to natural causes and (iv) which could not have been prevented by any amount of? foresight, plans, and care." Most urban cases fall right away on the first point since most urban area have been heavily manipulated by human agency. jd