One new bridge has been built and another rehabbed on Halsted Street between Division and Chicago Avenue.
The new one was paid for with Federal Highway Administration grants. The other was funded entirely with money from the city's tax increment financing program.
"You can't build a 21st century economy on 20th century infrastructure," said Chicago Transportation Commissioner Gabe Klein. "This is a great example of that."
The new, modern design bridge is wider, with two travel lanes and a new bike lane in each direction.