SRWRA 600ML Storage

Exact Contracting mobilised to Seaford Rise in October 2019 to  construct a 600ML storage for the Willunga Water Basin.    

The dam is a part of a significant sustainable resource management project  to hold reclaimed water that was historically pumped from Christies Beach  into the Gulf St Vincent. Expanding recycled water supply to the region  reduces the stress on the local aquifers, diverts this water away from the  ocean, and provides greater water security for the region.

Initial challenges were the project’s tight construction deadline, as well  as operating within an urban environment ensuring adequate controls were in place so that the surrounding community were minimally impacted.

The short construction timeframe was required to utilise the drier summer  months and enable commissioning of the dam to allow enough time to start accepting recycled water throughout winter to service the McLaren Vale wine region throughout the growing season of 2020.

The project scope of works included pipeworks, a DPTI road underbore, site  water and electrical connections, topsoil strip and stockpile, landscaping  bund construction, site access roads and perimeter fencing, bulk earthworks,  clay lining, under-drainage, inlet/outlet and overflow structures and HDPE lining. The cut and fill to finished surface was 360,000m3 (the equivalent of  approximately 6,200 40ft shipping containers) which also included 74,000m3 of  over excavation subgrade preparation. 95,000m2 of dam HDPE lining, (the equivalent size of 5 Adelaide Ovals) was  installed and secured in a cement stabilised anchor trench.    

Key achievements throughout the project:

  • Working diligently with the Client and third party engineer SMEC to ensure all quality assurance criteria was achieved for sign off on practical  completion 5 months from site mobilisation.
  • Skilled and competent personnel to undertake detailed pipe and surrounding civil works (including under-bore of Victor Harbour Road) in conjunction with  bulk earthworks.
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Client
SRWRA
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Completed
2019
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Services
Agricultural Services, Water Infrastructure
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Location
South Australia
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