2018-01-15 General Committee Agenda

GENERAL COMMITTEE MEETING AGENDA                                                      15 JANUARY 2018


The Code’s Overall Outcome includes provision for ‘lots avoid significant adverse effects on the
natural environment and landscape and minimise the risk of hazards for people and property’.
The proposed building envelopes range from 257m2 to 618m2, with an average size building
envelope of 494m2. The building envelopes are generally half the size of the lot. The lots contain
significant amounts of vegetation and building envelopes generally enable the landowner to
utilise the land to its greater extent with regard to building form. It would be expected that very
little of the vegetation within the proposed building envelopes will be retained. The applicant was
requested to address this issue at the information request stage, but declined to modify the
building envelopes.
Generally, the proposed building envelopes exceed the maximum building site cover of 50%
(ground floor) of the total site area required in the Eastern Beaches Locality code.
The following Specific outcomes of the Reconfiguring a Lot Code apply to this proposal.


Specific Outcome                    Probable Solutions       Proposal
O19 Stormwater run-off is           No solution provided     The applicant has proposed to provide 100m 2
managed so as not to cause any                               bioretention basins for each individual
adverse impacts on the built or                              allotment. This proposal would require
natural environment including                                conditions       ensuring    an    appropriate
changes in quality, quantity or                              Operational Works approval was sought that
location     of     stormwater                               ensured the water quality targets were
discharges.                                                  appropriately achieved, as well as covenants
                                                             placed over the basins to ensure individual lot
                                                             owners appropriately maintain the basins.
                                                             The expert geotechnical advice was that
                                                             drainage from the proposed subdivision could
                                                             rely on infiltration only. Geotechnical advice
                                                             provided for other sites along the eastern
                                                             beaches has indicated that coffee or other
                                                             floating rocks within the dunal system may
                                                             intersect concentrated water flows from the
                                                             hardstand areas and cause water to push out
                                                             the dune and cause scour. These other sites
                                                             have needed to install pipework that
                                                             discharges concentrated flows as low down
                                                             the dune slope as possible. A geotechnical
                                                             investigation to the presence of rocks within
                                                             this site would be able to give an indication if
                                                             this is required here to give a more realistic
                                                             understanding of any vegetation clearing
                                                             needed for installation of pipes for drainage
                                                             management in the event there are rock
                                                             floaters in the substrate.
O20 Filling or excavation only      No          prescribed   Proposed excavation on site and filling results
occurs where it does not            solution.                in removal of vegetation that is mapped on
adversely impact on—                                         Biodiversity Overlay maps.
a) watercourses, drainage lines
and wetlands; or
 b) vegetation on land identified
on Biodiversity Overlay Maps
OM1.1-OM9.1; or
c) water levels on properties
elsewhere.




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