Actew Water have announced the last roller compacted concrete has been laid on the expanded Cotter Dam.
Canberra’s great wall, the Enlarged Cotter Dam is nearing completion, with the final load of Roller Compacted Concrete (RCC) laid in the early hours of Saturday morning.
This is a significant milestone for the ACT and Queanbeyan community who will benefit from the improved water security the new dam will provide for generations to come.
The wall has all but reached its full height of 80 meters, with the detailed curved concrete cap, which helps control the flow of water over the top of the dam, being the next stage.
Some work remains in 2013 on areas like the concrete structures running down the sides of the dam and in the stilling basin at its base.
The rest of the dam structure and related works will be completed by autumn next year, with the remainder of the rehabilitation, demobilisation and commissioning work due for completion in the winter.
And they’ve even got fun facts for us:
– 365,000 cubic meters of Roller Compacted Concrete was used to build the bulk of the new dam.
– 1,000,000 tonnes of rock was used to manufacture the RCC. This was mined and crushed on site, dramatically reducing the associated construction truck traffic and haulage kilometers on the neighbouring roads.
– The quarry the rock came from will eventually be located under the full supply level of the new dam and will also be used for fish habitat as the new reservoir fills.