Work will start on the second phase of the River Ness Flood Alleviation Scheme within weeks.
The next stage of the project will involve flood walls being built along the riverbank between Friars Bridge and the harbour mouth.
The multimillion-pound scheme is being carried out a quarter-of-a-century after an Inverness railway bridge was swept away when the waterway spectacularly burst its banks.
The rail tracks were left hanging above the torrent in 1989.
Now the company which built a ferry terminal extension on Skye has been awarded the £9.3million contract for the second phase of the project.
Paisley-based McLaughlin and Harvey Ltd will move its equipment on site by the end of the month before starting work.
The firm built the ferry terminal extension at Sconser, which was opened last year.
Letters have been sent to residents who will be affected by the work but a public exhibition will also be held at Trinity Church, Gilbert Street, on Wednesday, March 26, from midday-6.30pm, to provide more information about the scheme.
It is understood that roads in the area will be restricted at certain points during the year-long project.
A Highland Council spokesman said that residents and businesses affected by the phase two works had been contacted.
He added: “The scheme will raise the existing flood defences along both banks of the river in the form of low walls and embankments. To enable construction of the flood scheme, temporary traffic orders will come into force on streets affected by the works.
“The works will be carried out at the same time as works on the first phase of flood alleviation between Ness Bridge and Friars Bridge. Every effort will be made to minimise traffic disruption.”
Inverness Central councillor Donnie Kerr said he did not think the works would cause too much disruption to traffic.
Meanwhile, work is continuing on the first phase of the scheme, between Friars Bridge and Ness Bridge. The project was delayed when large boulders were found underground last year. The whole project, which is worth £13million, is expected to be completed in April next year.