The new Windsor bridge is due to reach the southern side of the river this week, with the final segments launched by contractors.
A construction update provided by Roads and Maritime Services (RMS) sent to residents of the area stated major work was continuing this month.
An announcement is expected from Roads Minister Andrew Constance this week.
"We will launch the final segments and the bridge will reach the southern side in September," the RMS update stated.
"When the bridge reaches the southern side, we will remove the launch nose," the update stated. "Concrete work will restart at each abutment to complete the approaches.
"We will also remove the casting bed formwork and supporting structures.
"The marine access platforms will remain in position after the bridge launching as we reconfigure the bridge bearings. Our floating pontoons will remain in place to provide access for this work."
"Significant progress" had also been made on the proposed heritage interpretation for the project, with RMS working with Hawkesbury City Council, Hawkesbury Regional Museum, and state and local heritage specialists.
RMS was also working on displaying convict-built drains found at Thompson Square.
"The development of the interpretation plan is informed by the national guidelines," RMS stated.
"We are also working with the Hawkesbury Regional Museum on options for heritage interpretation and displaying of artefacts, including the brick box drain recovered from Thompson Square."
Other examples of artefacts retained from the project area and included in the update were old coins, a buckle and an axe head.
"Findings from the archaeological investigations for the project support 27,000-plus years of traditional custodians being here," RMS stated. "We are working with the local Darug community to include their artwork, stories and voice and incorporate a first person, Aboriginal point of view into the project's final outcome.
"The most important element to capture is to have an inclusive approach with truthful storytelling."
Construction on the new bridge began in September last year, and it is on on track to open mid-2020.
