RISK MANAGEMENT

Bendigo CWS Liner repairs

The integrity of the Bendigo WaterTreatment Plant Clear Water Storage has been compromised by multiple splits in the bottom liner f the storage. The splits have not resulted in water quality issues.

The situation was stabilised and safe drinking water continued to be safely supplied to the community.

Contingency plans were developed to mitigate the risk of catastrophic failure and provide continued supply of drinking water.

1. Emergency CWS bypass from CWS inlet to outlet of the raw water screen shed

2. Temporary CWS 600mm bypass from CWS inlet to re-purposed oxidation tank

3. Reconfiguration of Network to reduce reliance on CWS.

4. Fast track project to replace CWS storage liner (previously scheduled for 2024)

5. Management of underdrain water via return to Sandhurst reservoir

Construction works on the temporary bypass commenced in March 2023. Works included

● Relocate Raw water pump for the CWS bypass to Oxidation tank

● Installation of submersible pump in the CWS inlet

● Construction of temporary CWS ie.3 x 1.4MLtemporary tanks and retrofitting the reclaimed water tank as a 0.5MLCWS

● Pipework to connect to temporary tanks

● Ongoing monitoring, internal inspection and repairs to existing CWS

● Developing Operations Manuals, control philosophies and commissioning plans

Initiatives and Innovation