The Murray-Darling Basin Authority, Transport for NSW and Regional Roads Victoria are putting in place the last pieces of the plan to support closing the weir to traffic.
MDBA head of river management Andrew Kremor said all involved agencies were working closely to inform the local community of the imminent closure.
"We are closing the weir to traffic to ensure the ongoing safety and structural integrity of the Yarrawonga Weir, but it’s important to note that people will still be able to walk or ride their pushbikes across the structure," Mr Kremor said.
"Our original plans to close the weir last year were delayed due to COVID-19 and to allow the completion of maintenance works on the Yarrawonga-Mulwala Bridge."
Victorian Department of Transport’s Steve Bowmaker said there were about 1500 weir crossings a day compared with 8200 crossings of the Yarrawonga-Mulwala Bridge (pre-COVID figures).
"We have been working to ensure key stakeholders such as trucking and freight companies are aware of the need to change their route from mid-October, and signage will be in place to give advance warning," Mr Bowmaker said.
Transport for NSW’s Sam Knight said maintenance work on the Yarrawonga-Mulwala Bridge to repair the bridge's steel truss, upgrade traffic and pedestrian barriers, and undertake line marking had been completed, paving the way for the closure of the weir crossing.