The large-scale urban development project will deliver 4,800 residences over the next 15 years, consisting of residential, employment, retail, education and open space use over 50 hectares. When complete, Calderwood Valley will be home to 12,400 residents and it is estimated to deliver AUD$2.9 billion in development expenditure over the next decade and a half.
Cardno, working closely with one of Australia’s leading international property developers, Lendlease on stages 1-3 of the Calderwood Valley urban development has delivered concept and detailed engineering design. We were also responsible for a water cycle management study and development of the water sensitive urban design strategy and a floodplain risk management study for the nearby Macquarie Rivulet and Marshall Mount Creek.
Cardno also provided a geomorphology assessment, utility infrastructure servicing strategy, transport management and access plan, land survey, GIS support, town and environmental planning and project management of the sub-consultant team.
Stage 1 of 400 lots is complete, incorporating a bridge and a Roads and Maritime Services intersection. Construction of stage 2 and 3 is underway and together will deliver another 1,500 lots.
Since earthwork began across Stage 1 in 2015, the need to better understand the fill requirements and construction progress on the project has increased. Traditionally this would be monitored by recording the number of trucks entering the site and estimating the volume of material in each truck.
Due to the large areas being covered, the project requires an accurate understanding of the fill requirements at each stage at regular intervals.
Cardno captured high resolution aerial photography across the site in May 2016 using a Sensefly eBee RTK along with ground control points captured using a Trimble R10. The eBee uses photogrammetry from the captured photos to create a surface model.
The result was a point cloud dataset with RGB values, contours derived from the digital surface model and a high resolution ECW orthophoto, all of which will be used to monitor construction progress.
A snapshot of the state of play across the site could be quickly gathered through a comparison of the design surface with the current surface derived using the data captured on site.
This analysis was completed in GIS and easily shows the areas where the design surface has been achieved and highlights areas where more fill is required.