WestWater (a Centurion company) delivered a multi-process upgrade including pH correction, filtration, and UV disinfection, ensuring the Cranbrook water treatment plant (WTP) met Level 4 standards and supported future demand.
Scope of Work
Our team was engaged to deliver upgrades to the Cranbrook Water Treatment Plant in WA, which sources raw water from two dams with artificial bitumen catchments.
The Cranbrook water treatment plant faced a number of pressing challenges:
- Water quality issues had required carting water to site during poor quality events, creating additional costs and risks
- The existing bulk chlorine tablet dosing system often resulted in non-compliance with chlorine levels in the Cranbrook reticulation network
- To safeguard public health, the client required the WTP to meet Level 4 source treatment standards, adding additional treatment barriers for pathogen protection.
Execution
Over a two-and-a-half-year period, WestWater designed and constructed major upgrades to the WTP, ensuring enhanced treatment capacity and long-term reliability.
The upgraded plant included:
- pH correction
- Coagulation
- Disc filtration
- Ultra-filtration
- Ultra-violet disinfection.
Modifications were also made to the existing chlorination module to suit new chlorine dose rates.
Outcome & Value Delivered
- Increased plant capacity to deliver 247kL per day within a 16-hour operating window
- Improved compliance with Level 4 water source requirements
- Peak demand met efficiently:
- Average Day Peak Week = 198kL/day
- Peak Day = 247kL/day
- Peak Instant = 30.5kL/hour
- Additional storage capacity with a new 60kL filtrate tank, supplementing the existing 200kL high-level tank, ensuring sufficient treated water for future demand.
By combining multiple treatment processes in one integrated upgrade, Centurion strengthened water quality, improved compliance, and provided long-term reliability for the local community.
