Securing drinking water for Kalgoorlie

The Challenge

Ordinarily, water from the reservoir in Mundaring is pumped to the local water treatment plant and then to Kalgoorlie via the famous C.Y. O’Connor pipeline. However, a contingency was required to secure the supply when water cannot be taken from the reservoir.

Utilising water from Perth was the obvious solution but would require a storage tank to be placed in the nearby national park – an option fraught with practical and environmental difficulties. An alternative solution was then proposed, featuring a new pump station – Pump Station C – operating in series with the Water Corporation’s Lower Helena Pump Station.

However, before committing to the design, our client – Acciona-Trility Joint Venture (ATJV) – wanted to confirm that the new system would work effectively with the existing infrastructure.

" OneStone provided excellent service, delivering a quality output within a very tight timeframe on a system with complex hydraulic challenges "

Shane Farquharson, Principal Engineer Water, GHD

The Solution

Working with engineering consultancy GHD, we used our real-time control modelling, water hammer analysis and steady-state modelling specialty to validate the proposed design, which would enable the existing pump station to work in tandem with the new Pump Station C.

Taking system and design data from GHD, we were able to use our model to test the new pump station in various scenarios and validate the system’s specifications and performance.

The Result

With peace of mind that the pump stations’ two control systems would integrate effectively, and that the proposed surge-protection measures would work, ATJV was able to move forward in the knowledge that the complex system had been comprehensively tested and validated.

Key Personnel

Eelko van der Vaart


Water Utilities


Water Hammer Analysis Real Time Control Strategies