Liddell Power Station Fly Ash Dredging

Scope of Works

AGL Macquarie engaged Neumann Dredging to dredge fly ash from a temporary storage facility to a permanent storage location at the Liddell Power Station.

Neumann Equipment designed and built 450mm cutter suction dredge, the Nu Bounty was used for the project in conjunction with a 2,000 hp, Neumann Equipment built, 450mm booster station working 7 days per week.

The fly ash was pumped a maximum distance of 2.8km through a 630mm polyethylene pipeline and discharged at various locations along the pipeline’s path utilising a system valve tap-sets. This enabled the fly ash to be evenly distributed evenly over the large deposition site.

A smaller Neumann Equipment built 300mm booster pump was used to pump the supernatant water from the slurry back into the dredge pond for re-use.