Transport for NSW is carrying out essential maintenance on the Camden Haven Inlet breakwall at North Haven to replace rock that was displaced during the floods in early 2021.

The area experienced extensive flooding in March.

A Transport for NSW spokesperson said the work would take about three weeks to complete from Monday, November 15, tides and weather permitting.

Work will take place between 7am and 6pm on weekdays and 8am to 1pm on Saturdays.

"The project team will let residents know in advance if repair work needs to be done outside these times," the spokesperson said.

"The work will involve the use of machinery which generates some noise, including an on-water barge to place the rocks."

There will be an increase in truck movements in the area.

"We will make every effort to minimise noise impacts while completing this repair work," the spokesperson said.

A section of footpath along the breakwall is temporarily closed with a detour around Wall Reserve Park in place.

A section of the road into Wall Reserve Park will be temporarily closed.

"Please keep to speed limits and follow the direction of traffic controllers and signs," the spokesperson said.

Residents with any questions can contact the project team on 1800 571 311 or email Maritimecomms@transport.nsw.gov.au