The small equipment barge was working on the Chicago Riverwalk expansion near the LaSalle Street bridge when it began taking on water early Thursday morning. The barge is roughly 100 square feet and is owned by Walsh Construction.
At the time it sank, the barge was located on the perimeter of the river and is not blocking or affecting local boat traffic.
The Chicago Department of Transportation has not provided details about the barge's cargo but say that any possible fuel or oil spills have been contained from contaminating the river.
No one was on board at the time the barge sank.