Exact Contracting was engaged to construct a 680 megalitre water storage dam in the Barossa Valley. The site, which was previously a vineyard, was cleared to make way for the dam.
The project involved moving approximately 250,000m3 from the dam footprint to construct the embankments. Various pipework was installed including a diversion line to replace existing irrigation lines, inlet/outlet pipes and internal pipework for drainage purposes. Two culverts were also installed, which included both overflow and storm water culverts.
The following works were undertaken:
Site survey and set out conducted prior to works and during construction.
Cut and fill materials utilised for embankment construction.
Pre-conditioning of material prior to placement and compaction through dozer ripping and watering.
Foundations and uniform fill layers were compacted to design specifications.
Final trimming to design utilising GPS dozer and grader.
Removal of existing irrigation pipeline within the dam footprint.
Installation of a 300 mm PVC diversion line.
Installation of 630 mm poly inlet/outlet pipelines, and associated in ground valves and above ground flow meter assemblies.
Installation of overflow culverts and headwalls, storm water culverts and headwalls, and rock lined swales.
Rubble roadways for site access and around dam crest.
Installation of HDPE liner on dam floor, upstream batters and associated drainage systems.
Ascon survey of completed works.
View the aerial footage of the Dam being constructed: