19_01_16_AIA_Alba_25 Kauri St_V1 · MCU18/0165

                                                                             Consult Arborist

On completion of the development, the two subject trees will be positioned on the fence line
directly to the rear of the complex residential dwellings, with branch encroachment over the
courtyard gardens and with canopies within targeting distance of the dwellings.

Accepting that these eucalyptus trees will drop debris, including leaf and twig, constantly, and
with small branch failure common, these trees will cause a nuisance to the new occupiers that
in turn, will place pressure on Noosa Council to resolve/manage.

Their proximity to dwellings propounds an element of safety that needs to be considered. An
ISA Tree Risk Assessment has been undertaken to determine the increase in risk that could
ensue. For further explanations see Appendix 2 – Tree Risk Assessment Methodology and
Appendix 3 - Definition of ISA Terms. Currently, the Occupancy beneath these trees is rated
as Rare or Occasional with the likelihood of branch failure impacting a target as Very Low.
When the development is completed, this will change to a 'Constant' occupancy rating with
the target (dwelling/private property) having a 'High' likelihood of the target being impacted
with minor to severe consequences depending on the size of the branch drop. The resulting
Matrix 2 - Level of Risk is Moderate to High.

This level of unprotected exposure from a forestry type eucalyptus trees is generally not
recommended with the tree’s removal and replacement with a suitable urban treescape
species a more viable long-term option.




   Picture 2: Tree 2 with dense understory                     Picture 3: Tree 3

While it is not recommended from an arboricultural risk perspective, if it is the desire of Noosa
Council to retain these trees, a comprehensive Tree Protection Plan will require
implementation to minimise the impact of the project works. The protection will be guided by,
but will not adhere to, AS4790 – 2009 Protection of trees on development sites, nor industry
best practice and the supervising presence of a suitably qualified and experienced Arborist
with a high level of experience will be required as an onsite Project Arborist.




19_01_16_AIA_Alba_25 Kauri St_V1                                                    Page 12 of 19