Water

• 15% Water demand sourced from non-potable sources
• 15% Rainwater, stormwater, wastewater, groundwater or tunnel inflow water generated during construction & operations reused, recycled or reclaimed

Infrastructure projects require a significant amount of water for construction and operations. JHCPB’s Construction Water Reuse Strategy outlines the measures the Project will investigate to ensure water savings are realised during construction. Since the commencement of construction, the Project has sourced 8,372 kl of water usage from non-potable sources, with over 76,000 kilolitres of total water consumed.

Key initiatives to reduce potable water use during construction include: 

• Use of rainwater tanks in construction compounds for domestic purposes
• Use of non-potable water for earth compaction, wheel wash, belt wash and dust suppression
• Sharing of treated ground water between tunnelling works and civil sites

As part of detailed design, JHCPB have investigated the following initiatives to reduce water consumption during operations and replace potable sources with non-potable alternatives:

• Water Efficiency Labelling Scheme (WELS) tapware specified at operational buildings and public use facilities
• Rainwater harvest for domestic purposes
• Reduction of potable water consumption through the treatment of groundwater for irrigation and tunnel washing
• Specifying water efficient systems for fire deluge commissioning and specifying Dry-Flo® technology for commissioning
• Utilisation of polymer and remote controlled sprinklers for dust suppression during construction