Appendix B - Arborist Report 22 August 2025 · OPW16/0303.02

Arboricultural Impact Assessment - Palm Lakes Resort Cooroy - Revision 1 - IAS17818 - 22 August 2025

                         When pruning deadwood from trees, simple techniques and methods can be employed
                         to achieve hazard reduction whilst leaving food and habitat for tree dwelling fauna. Long
                         pieces of deadwood can be reduced in length to limit potential hazard but still retain
 Habitat
                         food for the insects and microorganisms. Stubs that have been left by old pruning or
 Pruning
                         previous branch failure can be retained, and with the use of a hole-saw or chainsaw they
                         may also be bored out to create a nesting hollow for native birds or small mammals.
                         Source: Mosman Council
                         Dead branches within canopy of tree. Deadwood is a naturally occurring feature of most
                         tree species and comprises dead or decaying branches within the canopy of a tree.
                         Deadwood may have habitat value and require removal only according to the
 Deadwood
                         considered risk of its location, i.e. high use pedestrian area or damage to adjacent
                         infrastructure.



 Decay                   The process of degradation of woody tissues by micro-organisms.


                         Results from loads or stress forces applied to the soil as well as shear forces. Both foot
                         traffic and vehicle traffic exert both forces on soils. Vehicle traffic may cause significant
                         compaction at depths of 150–200 mm (the area in which most absorbing roots are
                         located). The degree of compaction will depend on weight of vehicles, number of
 Compaction              movements, soil moisture levels and clay content. Soil handling, stockpiling and
                         transporting also tend to lead to the breakdown of soil structure and thus to
                         compaction. Vibration as a result of frequent traffic or adjacent construction activities
                         will also compact soils.

                         Stems or trunks of about the same size originating from the same position from the
                         main stem. When the stem bark ridge turns upward the union is strong; when the ridge
 Codominant
                         turns inward the union is weak, a likely point of failure in storm or windy weather
 Structure:
                         conditions or where increasing weight causes undue stress on the defective union.


Source: AS4373-2007 Pruning of Amenity Trees & AS 4970-2025 Protection of Tree on Development Sites




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