The Brandon Road bridge could reopen by the end of this week.
The drawbridge over the Des Plaines River has been closed since Sept. 14.
It is tentatively scheduled to reopen Friday, said Guy Tridgell, spokesman for the Illinois Department of Transportation.
The lengthy shutdown was due to the need to fabricate new components for the damaged center lock mechanism, Tridgell said.
The center lock has failed repeatedly since 2016, and IDOT has tentative plans to replace the entire system in 2020. The replacement project now is in the design phase, Tridgell said.
The center lock connects the two ends of the drawbridge when it is lowered and releases them when it is raised.
A sensor in the system failed when the bridge stopped working in September.
The bridge is one of six drawbridges over the Des Plaines River in the Joliet area. The other five are in downtown Joliet. The Brandon Road bridge is outside the city in the area of the Brandon Road Lock and Dam.