Beenyup Water Treatment Plant

The Metropolitan wastewater treatment plant (WWTP) upgrade was one of the most substantial wastewater programmes carried out in Western Australia. It involved the upgrade of the three biggest WWTPs in Perth. It was the first time in the state that three large WWTPs were upgraded simultaneously. The three WWTPs are located at Woodman Point, Beenyup and Subiaco.

We were engaged to execute work on the Beenyup upgrade, and the scope of our contract included:

• Construction of 4 x 30m diameter tanks, 7.4m high
• Construction of 2 digestive tanks, 10m high; and
• Additional construction of various other bases and structures.

During the project execution, we were faced with the following site-specific challenges:

• Dealing with the odour from the existing plant;
• Managing ignition sources relating to the significant risk of bush fire; and
• The potential risks from fauna and flora in the area, such as tick and snake bites.