CIMIC’s CPB Contractors to deliver Sydney Water’s Orchard Hills Water Filtration Plant Reliability Upgrade project

CIMIC Group company CPB Contractors has been selected by Sydney Water to deliver the Orchard Hills Water Filtration Plant (WFP) Reliability Upgrade (Pre-treatment) project.

The initiative will enhance the reliability and resilience of the drinking water supply for approximately 260,000 customers and support future development in the Blue Mountains and Penrith regions. CPB Contractors will work collaboratively with technology and design partners Veolia, BG&E, CWT, Atlas, CNFiTech and CIMIC Group company EIC Activities to design and construct a new pre-treatment facility at Orchard Hills WFP.

The project will deliver approximately $150 million in revenue for CPB Contractors. 

ACS Group and HOCHTIEF Chief Executive Officer and CIMIC Group Executive Chairman Juan Santamaría said: 
“This upgrade is critical to ensuring Sydney Water continues to deliver safe, high-quality drinking water to a growing population. By integrating advanced pre-treatment technology and leveraging CPB Contractors’ proven delivery capability, we are enabling a facility that will operate efficiently and reliably for decades during periods when raw water is impacted by extreme events.”

CPB Contractors Managing Director Craig Nuttall said: 
“Having delivered more than 100 water projects, including major water and wastewater treatment and distribution infrastructure, CPB Contractors has a proven track record spanning decades. Working closely with our specialised design and technology partners, we are committed to delivering innovative, value-for-money solutions that strengthen Sydney Water’s network and ensure reliable, high-quality drinking water for the growing Orchard Hills community.” 

The Orchard Hills WFP Reliability Upgrade (Pre-treatment) project includes:  

• Construction of a new pre-treatment plant to provide additional treatment of raw water before filtration
• Upgrade of existing chemical storage and handling facilities
• Removal of disused buildings and concrete structures
• Site works, including pipework, roadway and power supply upgrade.

Construction will commence in Q3 2026.

About us:

CIMIC Group is an engineering-led services, construction and natural resources leader with a history dating back to 1899. Powered by 39,000 people, and pioneering technology and engineering, we deliver high-value and sustainable solutions across the lifecycle of assets, infrastructure and resources projects in around 20 countries. CIMIC Group comprises our engineering and construction businesses CPB Contractors and Leighton Asia, our integrated solutions providers UGL and Sedgman, our natural resources company Thiess (60% ownership), and our development and investment arm Pacific Partnerships – all supported by our in-house engineering consultancy EIC Activities. Our mission is to generate sustainable returns by delivering innovative and competitive solutions for clients and safe, fulfilling careers for our people. We strive to be known for our principles of Integrity, Accountability, Innovation and Delivery, underpinned by Safety.

Contact details:

Fiona Tyndall, Communications T+61 429 370 414