Info Request Response Traffic Management Plan 25-9-25 - JN1006_2-Bennett-3FergusonSt-AIA092025

                                                                              [email protected]


 Tree ID                                  2
 Botanical name (Common name)             Banksia integrifolia (Coast Banksia)
 Origin                                   Indigenous
 Height                                   7m
 Trunk diameter (DBH)                     35cm
 Diameter above root butress (DAB)        36cm
 Crown spread (N-S x E-W)                 5 x 5m
 Notational Root Zone (NRZ) radius        4.2m
 NRZ area                                 55.42m²
 SRZ radius                               2.15
 NRZ incursion                            60%
 Encroachment type (AS4970-2025)          Major
 Health                                   Fair
 Structure                                Fair to poor
 Age                                      Semi-mature
 Useful Life Expectancy (ULE)             1-15
 Significance                             Council tree
 Defects                                  Codominant stems, Growing adjacent to/below
                                          powerlines (inappropriate location), included bark
 Retention Value (IACA, 2010)             Medium
 Recommendation                           Remove to facilitate development. *The removal of
                                          this tree forms the basis of this report.
 Arborist comment                         Adam Demler 05/09/2025: The above-ground
                                          root buttress of Tree 2 has a radial diameter of
                                          approximately 160 cm. A hand-dug trench
                                          measuring 3 m × 0.1 m × 0.1 m was excavated 1
                                          metre from the outer edge of the trunk, oriented
                                          perpendicular to the kerb. Within this trench, only
                                          fine roots were encountered, along with two
                                          structural roots that were successfully traced back
                                          to the root collar of Tree 2.
                                          A second trench of (of similar dimensions) was
                                          excavated adjacent to the existing brick wall. No
                                          significant roots were identified in this location;
                                          however, displacement of the wall suggests the
                                          presence of roots exerting pressure from below.
                                          Both investigations indicate that the tree’s root
                                          system is likely to be growing in a downward
                                          trajectory, consistent with typical behaviour in
                                          sandy soils. This deep-rooting tendency may
                                          reduce the likelihood of surface-level root conflict
                                          with the proposed VXO.
                                          In conclusion, if the TPS is adhered to while
                                          undertaking the proposed works the trees health
                                          and structure will not be significantly impacted.




Tree Management Plan (TMP)           Ref: JN0823                                      Page 13 of 33