Attachment F - Engineering Package · MCU22/0171

                                                   5


longitudinal section has been provided to demonstrate the driveway grades are appropriate and that
there is sufficient vertical clearance for vehicles to enter site and the basement. Minimal works are
required in the easement within the adjoining lot and include an extension of the concrete
pavement to connect the existing surface with the subject site. The existing infrastructure in the
adjoining lot does not require extensive modification to facilitate access to the proposed
development.
Vehicle parking is provided for within the basement with a total of five (5) resident spaces at right
angle parking accessed via the driveway aisle. Two (2) parking spaces for visitors are provided at
ground level, ensuring visitors are not reliant on the basement for parking.
Vehicle turn paths have been developed using the Vehicle Tracking function of AutoCAD Civil 3D
2023 and are included in the Engineering Drawings and demonstrate that all vehicle manoeuvring is
accommodated safely and efficiently.


2.2     Pedestrian Access
The site is serviced by existing Council concrete footpaths across the Gympie Tce frontage and within
Council land adjacent to the northern boundary. The development proposal includes pedestrian
access paths linking directly to the existing path network.



3.0 EARTHWORKS

3.1     Cut and Fill Operations
Earthworks will be required to deliver the proposed development and includes excavation for the
basement and installation of fill to achieve the finished surface levels required to provide flood
immunity. The Engineering Drawings include cross sections at key locations to demonstrate the
depth of excavation and filling.

3.2     Basement Excavation
The basement extents are shown on the Architectural Plans and Engineering Drawings and require
excavation below the existing surface. The depth of excavation is less than 2.5m and will generate
approximately 500m3 of spoil to be taken off site. The excavation will be undertaken in accordance
with a suitable Acid Sulphate Soils management plan and Groundwater management plan, to be
developed at the relevant stage of the development and in accordance with a future Operational
Works development application.

The existing ground outside of the basement footprint will be supported during works by a
contiguous pile retaining wall (cast instu concrete) or a steel sheet piling system, to provide the
necessary ground support via cantilever as opposed to internal propping. The final design will be
subject to detailed geotechnical investigation, but it is expected that either of these methods will be
suitable for the site.

3.3     Filling of Lot
Once the basement walls and roof have been constructed the site will be filled to provide a building
pad at the required height. The depth of fill is 600-800mm and will require construction of core
filled block retaining walls within the site along the relevant boundaries. The proposed wall