Constructed in 2013, the Koondrook Perricoota inlet regulator is a reinforced concrete structure designed to deliver managed flows of water to the Koondrook Perricoota Forest. It is owned by the Murray—Darling Basin Authority (MDBA) and operated by WaterNSW.
The inlet regulator is located off the Murray River, south west of Deniliquin and 800m from Torrumbarry Weir. The structure has five aluminium tilting gates to provide environmental releases.
Regulator repair
The Koondrook-Perricoota inlet regulator has experienced ongoing structural issues since 2014, which have affected its ability to manage water flows safely and efficiently.
Recent inspections have identified an increased risk of a piping failure, and the regulator has been taken offline to enable a coffer dam to be installed to protect the integrity of the Torrumbarry Weir pool.
To address the risk, interim work has been carried out to help maintain the integrity of the inlet regulator structure and the weir pool. This includes the installation of a temporary coffer dam and dewatering of the structure to allow for investigation and delivery of long-term remediation works.
Environmental water impacts
While the inlet regulator is offline, environmental water flows to the Koondrook-Perricoota Forest via the inlet channel will be temporarily unavailable. This is necessary to allow the structure to be repaired safely.
Repairs and timing
The following work was completed in mid-2026:
- Upgrades of access tracks
- Installation of temporary coffer dam
- Dewatering of structure
Continual monitoring of seepage and movement will occur throughout the remainder of 2026.
A contractor is scheduled to mobilise on site in late 2026 – early 2027 to commence long term remediation works. These are scheduled for completion in mid-2028, weather permitting.
Location
Safety
There is no immediate risk to the community or surrounding areas. These works are a precautionary measure to ensure the ongoing safety and function of the inlet regulator and the Torrumbarry weir pool.
The MDBA and WaterNSW continue to work with Basin governments to prioritise maintenance and ensure water infrastructure remains safe and functional.
Updates
- Community update - Koondrook-Perricoota inlet regulator intervention works - July 2026 (PDF, 396.08 KB)
- Community update - Koondrook-Perricoota inlet regulator intervention works - June 2026 (PDF, 457.71 KB)
- Community update - Koondrook-Perricoota inlet regulator works - April 2026 (PDF, 426.08 KB)
- Community update - Koondrook-Perricoota inlet regulator intervention works - March 2026
(PDF, 384.27 KB) - Community update - Koondrook-Perricoota inlet regulator intervention works - February 2026
(PDF, 289.69 KB) - Community update - Kondrook-Perricoota inlet regulator intervention works - December 2025
(PDF, 207.78 KB) - Community update - Kondrook-Perricoota inlet regulator intervention works - August 2025
(PDF, 233.45 KB)
Contact
If you have any questions or would like further information, please contact engagement@waternsw.com.au or visit mdba.gov.au.
The MDBA also provide regular communication through River Murray weekly reports.
WaterNSW acknowledges the traditional custodians of the lands and waters on which we work and pay our respects to all elders past, present and emerging. Learn more