Wayne Cahilly - Graydon Sycamore Case Study

Risk Assessment in Municipal Arboriculture:

The Graydon Sycamore Case Study



Ridgewood, NJ — In February, the beloved sycamore tree at Ridgewood’s Graydon Pool came down after it was discovered that the tree was structurally unsound and posed a risk of falling. While the community grieved the loss of this iconic tree, the health of the village’s trees and safety of its residents take priority.


But just how was this decision made and what are the factors that go into making such an evaluation? The Ridgewood Shade Tree Commission is pleased to welcome certified arborist, Wayne Cahilly to the Ridgewood Public Library on Tuesday, April 10th to answer these questions.


Mr. Cahilly assessed the health of the Graydon sycamore and will describe his work and observations related to the sycamore, including the condition of the tree and the risk it represented. He will also give audience members insight into the process that takes place when making such difficult risk assessment decisions. Additionally, he will provide a basic overview of tree physiology and structure so attendees can better appreciate the science that informs these decisions.


“The Graydon sycamore was an icon in our village, and I know many residents had strong feelings about its removal,” said Andrew Lowry, chairperson of the Ridgewood Shade Tree Commission. “We hope this presentation will help residents understand what went into making this tough decision and the complexities of risk assessment more generally.”


This lecture is free and open to the public.


What:                    Graydon Sycamore Case Study

Who:                     Wayne Cahilly, Owner of Cahilly’s Horticultural Services, LLC

Where:                 Ridgewood Public Library, 125 N Maple Ave, Ridgewood, NJ