Contractors are completing construction, installing electromechanical equipment and automated control systems, and landscaping at tidal-control gates across the project.
Nearly 1,500 engineers, workers and other staff have been deployed, along with barges, tugboats and excavators, according to Trung Nam An Trieu Company.
Work on the project's major components is largely complete, with individual sites between 92 and 99 per cent finished.
At Phu Dinh, one of the project's six major tidal-control gates, work was 93 per cent complete as of September 18. Contractors are finishing roads, pavements and embankments and installing electrical equipment and a SCADA control system.
The main gate has been installed and is operational, while work on the navigation lock gate is expected to be completed shortly.
Tan Thuan gate is 95 per cent complete, with trial operations planned for October. Ben Nghe has reached 99 per cent and is undergoing periodic trial operations, while Cau Kinh and Ba Buom are at 96 per cent and Phu Xuan at 95 per cent.
The project, launched in 2016, comprises six major tidal-control gates, two smaller gates, dykes along the Saigon River and related infrastructure.
Once operational, it is designed to reduce tidal flooding, improve rainwater drainage and limit saltwater intrusion across parts of the city, while strengthening its resilience to climate change.