The team at WestWater (a Centurion company) delivered critical upgrades to the Wauchope water treatment plant and Rosewood Reservoir, designing a new chlorine gas facility and modernising the Sodium Hypochlorite dosing system. The works increased treatment capacity to 21ML/day while improving safety, compliance, and reliability for long-term community needs. 

Scope of Work 

A local council in New South Wales required urgent upgrades to its water treatment infrastructure to keep pace with growing community demand. 

The client faced two critical issues: 

• Capacity at the Wauchope Water Treatment Plant (WTP) had recently been increased from 7ML/day to 21ML/day. This placed significant pressure on the existing chlorination system during peak periods. 
• The Rosewood Reservoir’s Sodium Hypochlorite dosing facility was in poor condition, with infrastructure urgently needing remediation to maintain safe and reliable operations. 

Execution 

The team at WestWater designed and constructed a new chlorine gas facility at the Wauchope water treatment plant to meet higher daily demand and provide a more robust disinfection process. 

In parallel, we partnered with a local construction company to upgrade the Sodium Hypochlorite dosing facility at Rosewood Reservoir. This included: 

• Demolition of the existing brick building. 
• Construction of a new shed to house the updated dosing system. 
• Reuse of existing hypochlorite storage and dosing infrastructure where possible. 

These works improved safety for operations and maintenance personnel while ensuring compliance with all relevant codes and standards. 

Outcome & Value Delivered 

Through practical design, construction, and collaboration with local contractors, WestWater delivered critical upgrades to the Wauchope WTP and Rosewood Reservoir.

• A fully operational chlorine dosing system, designed and built to Australian codes and standards. 
• Increased treatment capacity at Wauchope WTP to reliably meet 21ML/day demand. 
• Safer, modernised dosing facility at Rosewood Reservoir with improved working conditions for operators. 
• Extended life and functionality of existing hypochlorite infrastructure through selective reuse. 

 The result was a safer, more reliable chlorination process that supports both the growing community and long-term operational needs.