2022-04-19 General Committee Meeting Agenda

GENERAL COMMITTEE MEETING AGENDA                                                               19 APRIL 2022


            buildings or cat enclosures. This requirement is designed to protect lower canopy and ground
            nesting and feeding birds which occur proximate to the lot.
C.          Request that the Chief Executive Officer investigate the impacts of flooding on development
            in the Cooroibah area as part of the preparation of Local Disaster Management Plan for the
            Cooroibah Area and as part of future planning scheme amendments.


REPORT
1.          PROPOSAL
The application seeks approval for Reconfiguring a Lot to create 8 Rural Residential lots in a staged
development. The development stages and lot areas are detailed below:
Stage 1:
Stage 1 includes the creation of one lot (Lot 8) and balance area. The proposed lot will contain the
existing dwelling and take access off Glenridge Drive. The waterway extending through the site is
to be revegetated and covered by an environmental covenant.
    Lot             Area           Covenant    Building    PMF        Flood    Building         Max     Fill
                                   Area        Envelope    Level               Envelope         Above
                                                                               Floor Level      Natural
                                                                                                Ground
    Lot 8           3.170 ha       2.027 ha    0.416 ha    13.48m              12.87m           0.00
    Balance         13.23 ha       Nil         None
    area                                       defined

Stage 2:
Stage 2 includes the construction of a cul-de-sac through the site to service lots 3 to 7 with lots 1,
2 and 8 taking access directly off Glenridge Drive. The waterways and flood areas are proposed
to be revegetated and covered by an environmental covenant.

    Lot        Area            Covenant       Building    PMF    Flood        Building          Max       Fill
                               Area           Envelope    Level AHD           Envelope          Above
                                                                              Floor    Level    Natural
                                                                              AHD               Ground
    Lot 1      1.532 ha        1.096 ha       0.135 ha    13.52m              13.57m            0.4m
    Lot 2      1.554 ha        1.177 ha       0.127 ha    13.51m              13.56m            0.3m
    Lot 3      1.675 ha        1.019 ha       0.138 ha    13.51m              13.51m            0.3m
    Lot 4      1.512 ha        0.928 ha       0.134 ha    13.50m              13.50m            0.3m
    Lot 5      1.679 ha        0.923 ha       0.138 ha    13.52m              13.52m            0.5m
    Lot 6      2.970 ha        2.124 ha       0.146 ha    13.50m              13.48m            1.0m
    Lot 7      1.586 ha        0.592 ha       0.239 ha    13.48m              12.84m            0.9m
To achieve flood immunity, all proposed lots have designated building envelopes and building pads
that are located at the 1% Annual Exceedance Probability (AEP) (previously known as Q100) plus
a 0.3 metre free board. The applicant also proposes a building floor height above Probable
Maximum Flood (PMF) to achieve a safe refuge in such an event. Earthworks associated with
roadworks and allotments results in 681m3 of cut and 6037m3 of fill for the entire site.
The applicant submits that the layout of the subdivision has been designed around the flooding
and mapped environmental constraints of the site with extensive flood areas proposed to be
covered with an environmental covenant and revegetated. These covenant and revegetation areas
comprise approximately 9.995 hectares of the 16.38 hectare site and relate to existing vegetated
areas and flood areas.
To address bushfire constraints, a fire trail break trail with a width of 20 metres is proposed around
the house site areas and roadway and includes:
•           A trafficable area of 4 metres of managed grass or dirt

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