RFI - Aboricultural Impact Assessment

The existing old driveway cuts through what would normally be perceived as the tree's main
rooting area. The subject tree would, however, have been much smaller or may even have
grown up since the current driveway and roadway were constructed in the 70s / 80s, and
consequently, the tree has grown and adapted to its current situation, taking advantage of
available suitable growing conditions and deep sandy soils.

It is proposed that while a standard Tree Protection Zone (TPZ) cannot be achieved when
undertaking the project, all available space is protected to create an Exclusion Zone in which
the tree’s root zone can be retained with minimal disturbance.

The project design intrudes greater than 20% of the tree’s NRZ, and as such, this is classed
as a major root zone intrusion; however, no completed design is anticipated to occur in the
Structural Root Zone (SRZ) as per the Noosa Council requirements in the Information
Request. This level of intrusion, although not ideal, frequently occurs in suburban
redevelopment sites where existing larger trees clash with permittable development footprints.
In these cases, compromises need to be reached to achieve both outcomes.




                            Figure 5: Subject tree and existing driveway




25_10_21_AIA_TPA_23BottlebrushAve                                                  Page 8 of 19