Gunidgera weir raising

WaterNSW is raising Gunidgera Weir to improve water delivery in the Gunidgera-Pian system in the Namoi valley.

Located on the Namoi River, the Gunidgera Weir is approximately six kilometres west of Wee Waa. The Gunidgera Weir and upstream regulator enable water flows to be stored, controlled and released from the weir pool into Namoi River and Gunidgera - Pian Creek.

Constructed in 1976, the Gunidgera Weir allows for control and regulation of water. The Project will increase the maximum diversion capacity from the Gunidgera Weir pool into the Gunidgera - Pian Creek system from 1230 megalitres per day (ML/day) to 1650 ML/day. This will increase WaterNSW’s ability to meet customers’ water needs in times of peak demand.

Scope of work

• Raise Gunidgera Weir crest by 470mm
• Erosion protection at Gunidgera creek regulator
• Erosion protection at Cotton Lane culvert and Gudgewa Lane culvert.

The Project will have a range of benefits that include:

• improving water delivery to Gunidgera-Pian customers during peak demand periods
• increasing capability for on-time delivery to customers
• limiting environmental impacts by maintaining the existing channel width.

The construction works at  Gunidgera Weir will be scheduled following the completion of environmental  assessments and engagement with key stakeholders.

Prior to scheduling the construction start date, we will also take into consideration river flows and irrigation demands.

Status

• Currently considering an alternative design solution which will minimise the construction time frame.
• Review of Environmental Factors is being updated.
• Engagement with key stakeholders is scheduled to occur during April/May 2024.

A number of stakeholders, including customers and key government agencies have been engaged on the previous designs and construction methodology for the Gunidgera Weir Raising.

Following the finalisation of the new design and construction methodology, our team will be in contact and provide an update to all key stakeholders, including our Customer Advisory Group, River Operations Stakeholder Consultation Committee, government agencies, Water Users Association and local Aboriginal groups on the progress of the project.

For more information about Gunidgera Weir raising, please contact the Customer Service Centre at 1300 662 077 or email us.

Project Manager: Nathan Velautham