Attachment 5 - Traffic Impact Assessment Final PTT · 132005.638.06

Figure 7     Walking floor example to demonstrate applicability in moving materials to accumulation area



3.2          Concrete crushing area

3.2.1        Current operation
The Concrete Crushing Area (CCA) is operated by WMC, managing the stockpiles of crushed and
uncrushed concrete 7 days per week and utilising a loader and excavator shared with green waste and
mulch operation. Concrete is deposited in a designated stockpile area and crushed on an as-needed basis
by an external contractor, engaged directly by NSC. The frequency of concrete crushing is determined by the
NSC Operations Manager based on accumulated quantity to optimise cost efficiency. NSC have advised that
based on crushing contractor pricing, the most cost-efficient quantity accumulated is between 5,000 and
7,000m3 of concrete. Based on data for waste volumes on site, it is estimated that crushing occurs 2-3 times
per year, including a 120% sensitivity on waste quantity received (refer Appendix D). Specific pricing,
including mobilisation and cubic rates per output size, are not available for use in this report, however it is
assumed that cost efficiency increases with quantity of uncrushed concrete available with space being the
primary constraint.
Concrete received at the CCA includes solid clean concrete from construction and demolition, excess
concrete (liquid non-placed), and concrete truck washout water. All types are added to the same receival
stockpile. Crushed concrete is also stockpiled at the CCA by size, with 20mm, 40mm and 80mm available for
purchase from the NRRF. Crushed concrete stockpiles, including loading of purchaser vehicles is part of the
WMC operation of the area. The sales breakdown for 2023 provided by NSC is 12% for 80mm size, 23% for
40mm, and 65% for 20mm size. Crushed concrete is sold at $20 per cubic metre for all sizes, uncrushed
clean concrete costs $35 per cubic metre or pro rata per tonne to dispose at the Concrete Crushing Area.
Dust has been raised as an issue, currently causing delay to the concrete crushing operation due to dust
migration to public and Reviva areas. There is not currently an operational envelope or formalised trigger for
dust risk implemented by the NSC when planning or executing concrete crushing. During crushing, water
applied by water truck as a spray is used as a dust suppression as required but has been noted to not
manage dust to a level that prevents delays during crushing operations.




                                                     Project number 526384 File Noosa Masterplanning Report 2025-02-07 Revision 0   22