Residents of Katherine in the Northern Territory have been promised a major new flood protection project following severe flooding earlier this year. The Northern Territory Government has committed $13.3 million from its Flood Recovery Fund to help build a new levee in Katherine South.

The project is expected to extend for about three kilometres and is designed to provide additional protection for homes and businesses in parts of the town that were heavily affected by flooding. The announcement comes months after the Katherine River reached its highest flood peak since 1998.

The March flooding caused widespread disruption across Katherine, with floodwater affecting roads, homes and businesses. The existing flood protection system was overwhelmed in some areas, leaving residents dealing with prolonged water inundation and difficult recovery conditions.

The new Katherine South project will form part of a broader flood mitigation system for the town. According to the Northern Territory Government, the completed infrastructure is expected to provide greater protection when combined with the existing northern levee.

The planned project includes a combination of raised earth embankments and a concrete or constructed levee wall. Some sections are expected to reach around 1.6 metres in height, while the wall section is planned to be approximately 1.5 metres high.

Road-raising works are also included in the broader plan. Sections of Murphy Street, Murray Street and Bicentennial Road are expected to be raised as part of the flood mitigation work.

The government says the new levee could provide additional protection to about 210 homes and businesses in Katherine South. The project is being funded through the $100 million Flood Recovery Fund established following the severe flooding earlier this year.

Katherine Town Council has welcomed the additional funding, although local authorities have raised questions about how the new infrastructure could affect water movement in other parts of the town.

One concern is the possibility that floodwater could be redirected towards the Katherine showgrounds. Local representatives have also highlighted drainage problems that can cause water to remain in lower-lying areas for extended periods.

The project is intended to reduce the impact of future flooding rather than eliminate flood risk completely. The effectiveness of the system will depend on the design, drainage arrangements and how different parts of Katherine's flood protection network work together.

The timing of construction has not yet been confirmed. Authorities are still expected to work through planning and delivery arrangements for the new infrastructure.

For residents, the announcement represents another stage in the recovery from the March floods. The new levee is expected to strengthen Katherine's flood mitigation system and provide additional protection for areas south of the town centre.

The project also highlights the continuing need for regional communities in northern Australia to prepare for severe weather and flooding. Katherine's experience earlier this year demonstrated how quickly major river flooding can affect roads, properties and essential infrastructure.

The $13.3 million commitment will now move the project towards detailed planning and eventual construction, with residents waiting for further information about the construction schedule and final design.