2 David Low Way - Attachment 3 - Civil Engineering Assessment - Sheehy 10-8-17

residential development. An initial assessment of the site has been undertaken and has
identified that earthworks will be required over the development site area to adjust the
proposed residential allotments and provide driveway access and suitable stormwater drainage
collection and outfalls (refer Appendix C – Bulk Earthworks Layout and Sections). The extent
of works will be limited to minimise overall impact but to also develop appropriate lot and
building envelope layouts. These layouts will not compromise specific requirements of the
land owners and developers, but will be the subject of future Development and Operational
Works applications and approvals from the relevant owners, developers and Council.
As the natural slopes are relatively moderate, the road and allotment designs that are sensitive
to the topography should result in relatively minor earthworks, within the requirements of the
Earthworks Development Code. Based on the current anticipated development and industry
requirements it is to be expected that most of the lots and building envelopes will result in
minimal earthworks to establish allotments and building envelopes suitable for the
construction of the likely properties. It is not expected that the building structures will be
constructed of a slab on ground format.
It is anticipated that sensitive designs should result in no retaining structures being required
within the site and the site will be graded and the earthworks undertaken to achieve the
requirements of the Earthworks Development Code included in Appendix G.
All earthworks within the proposed development are to be undertaken in accordance with
AS3798-2007 Guidelines on Earthworks for Commercial and Residential Developments.

2.3      Road Infrastructure

The overall access requirements and the impacts on surrounding local road network, have been
addressed in the separate Traffic Assessment Report prepared by TTM Consulting Pty Ltd.
The proposed traffic augmentation works identified in the TTM Report would be delivered to
provide safe and appropriate access to the site from David Low Way and within the
development for property owners, visitors and service vehicles. Each individual
development/applicant would need to meet requirements for parking within the properties and
justify the extent of provision in the further development approvals.
The proposed access arrangement from David Low Way and the internal driveway is shown
on the Conceptual Access Arrangement Plan No. 17BRT0208-01 prepared by TTM
Consulting Pty Ltd and included in Appendix D. The Traffic Assessment Report completed
by TTM Consulting indicates that a Basic Right Turn Treatment (BAR) and a Basic Left Turn
Treatment (BAL) will provide for all manoeuvres at the access with left in, left out and right
in, right out movements provided from David Low Way. This can be accommodated within
the road reserve with some localised widening of David Low Way into the existing western
verge.
The internal access will be provided from a single 7.0m wide driveway reducing in stages
through 5.5m to 3m wide, depending on the number of properties accessing the driveway. The
driveway will incorporate a 5.5m wide turning bay to facilitate service vehicles (12.5m Heavy
Rigid Vehicle) entering, turning and leaving the property in a forward direction. Entry width
will be sufficient to provide two-way accessibility from David Low Way. The 5.5m width
driveway will provide for passing opportunities to the front of 3 of the 6 properties proposed
within the site. The proposed access arrangement and internal driveway complies with Noosa
Council Planning Scheme requirements in the Detached Driveways Code and is indicated on
the General Layout and Services Plan included in Appendix B.
As indicated in the Traffic Assessment Report the proposed connection to the external road
has been located both horizontally and vertically to ensure appropriate sight distances are
achieved.

Document No. 8531 Castaways Development-Rev C   Page 5                         Issue Date: 08/08/2017