Removal of Hollow Western Hemlock – Shoreline, WA
Western Hemlocks (Tsuga heterophylla) are notorious for decay in the roots and lower trunk, caused by Heterobasidion annosum (annosus root rot) and other organisms. When the decay spreads, it becomes defused throughout the trunk and can cause sudden whole-tree failure resulting in property damage or injury. Declining limbs in the upper canopy are a common indicator of declining health and the need for a risk assessment.
For this particular tree, we observed dead limbs in the mid-canopy and indications of decay in the lower trunk and root flare. To further investigate the condition of the trunk, we worked with Chris Rippey Arboriculture LLC to perform sonic tomography and resistance drilling. The results identified significant interior decay and an elevated likelihood of failure. As the tree was adjacent to a residential street and high-voltage wires, the client wisely decided to have the tree removed.
For safe access and maximum control, Tree133 utilized an articulated lift for this project. We also incorporated technical rigging to avoid the high-voltage wires and successfully lower carefully lower cut material. Careful planning and using the right tools enabled Tree133 complete the job safely and efficiently.
Removing this Hemlock eliminated a significant hazard to the homeowner, their family and their neighborhood. The client was shocked to see the extent of decay in trunk wood and was grateful to have the tree removed safely.