The Clutha District Council has applied to the Otago Regional Council for resource consent to extend the rock seawall in a bid to reduce erosion on the bank next to the estuary.
In the application, district council capital delivery manager Steve Gordon said the Pounawea community asked the council to complete the wall.
It wanted the area protected to discourage people dumping green waste on to the foreshore.
An existing section of a rock wall was completed in 2007, but extends only 485m along the shoreline at Pounawea. The council wants to add 337m to the wall.
Mr Gordon, a chartered civil engineer, said he did not believe the extension would have any adverse effects on the environment or water flow.
Pounawea resident Linda Mason said she was "totally delighted'' with the plan.
"Something has to be done, otherwise we're going to lose that whole point out there with the erosion.''
She said the existing rock wall was wonderful and the extension was much needed.
Construction on the first section of the extension was expected to begin in October, and take three months.
District council service delivery group manager Jules Witt said the council would not be able to do all the work at once.
"As funds allow, we can chip away and continue that rock protection further on.''
The original rock wall cost "several hundred thousand dollars'' and about $60,000 was earmarked for the latest project.
"We're going to match the work done with the available budget.''
The public can make submissions on the proposal until June 3.
