BHP Dam construction
Client name: BHP Billiton
Project value: $3.2 million
Contract period: 8 months
Background and scope
Having witnessed Simpson Earth’s efficiency and commitment to the environment in previous projects, BHP Billiton approached us to build a new freshwater dam for the upgraded washery.
This project involved the clearing of bushland, the stripping of overburden, concrete encasing the outlet pipelines prior to the construction of the dam wall, the construction of keyway in solid sandstone, the lining of walls with stabilised cement, reinforcing outside walls with sandstone boulders 3m x 3m, and the construction of an access road across the top of the new dam wall.
Simpson Earth developed a strategy to construct the new larger dam behind the pre-existing dam in order to keep the washery operating at its full capacity during the construction phase. A new spillway channel was constructed through solid sandstone to redirect the water into the existing bypass channel.
We ensured BHP Billiton wasn’t faced with any downtime as we successfully constructed the new dam, while the existing dam remained in operation. On completion we seamlessly transferred the water into the new dam decommissioning the old one.
The larger capacity dam enabled BHP Billiton’s new washery upgrade to operate at a considerably higher rate and in turn increasing its colliery’s productivity.