Flinders Ports has announced restoration work and improvements to the Port of Thevenard jetty will commence this week.
The company will undertake the works to ensure the jetty remains viable for commercial and recreational use well into the future.
The project, which is expected to cost $15 million, will see significant maintenance and renewal works performed to the existing 235-metre structure following the successful approval of the project's development application.
Improvements will also be undertaken, including a slight widening of the jetty deck and the installation of craneage points to facilitate future maintenance activity.
Works will include jetty beam and slab demolition, new piles and structural steel supports, precast concrete deck installation, and fit out of railings and kerbs.
Flinders Ports chief executive officer Stewart Lammin said the project was essential for the port's ongoing viability.
He said the project was due for completion in late 2020.
"These restoration works will ensure that the Thevenard jetty can remain open and fully operational, and create a safe facility for both commercial and recreational users well into the future," he said.
"We recognise the importance of this jetty for the Eyre Peninsula in supporting jobs and industry in the region, and we have a responsibility to manage its long-term viability.
"The jetty will be closed to the public for the duration of the project - it will remain in full commercial use throughout the restoration and Flinders Ports will work closely with stakeholders to minimise any disruptions to commercial operations."
Flinders Ports said it had been working with the Environmental Protection Authority and contracted environmental consultants to determine and address any potential environment impacts during construction works.
The company also noted there may be an increase in traffic around the site in upcoming weeks with the arrival of equipment.