Engineers worked to raise the road to put shoring towers in place. CDOT said repairs for a permanent fix is expected to be complete in the next 2-3 weeks.
"We would not be reopening this roadway unless we felt fully confident that it was safe for the public to use again," said Rebekah Scheinfeld, a CDOT spokeswoman.
A first spotted the cracks around 10 a.m. Monday beneath northbound Lake Shore Drive just south of Chicago River that forced crews to shut down northbound traffic between Jackson and Grand.
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"We think that this cracking was caused by a combination of corrosion coupled with the extreme temperature swings and recent weather," Scheinfeld said.
The shutdown turned Monday's evening commute into gridlock.
Experts worry that more issues like this to come.
"When a road cracks, we patch it," said Ed Maher, spokesperson with the International Union of Operating Engineers Local 150. "We fill a pothole and when the weather breaks like this and you have wild swings in temperature, that asphalt just explodes out of the pothole and we're going to see a lot more of that in the days to come because it's so much up and down."
According the American Society of Civil Engineers, more than 2,300 Illinois bridges are structurally deficient. Maher with the International Union of Operating Engineers says this is an overdue safety issue that needs better funding.
"We've got to find a long term sustainable funding solution that allows for us to get in and actually fix the problem, stop putting bandaids on these roads and bridges and actually repair them to a point where our families can feel safe driving on them once again," Maher said.
CDOT says they did a full inspection of the Drive Monday and found one other trouble spot on the southbound entrance to Lake Shore from Wacker. That section has since been cleared and reopened.
Southbound Lake Shore Drive has not been affected. The southbound bridge is not connected to the beams that support the northbound lanes.
According to the Illinois Department of Transportation's website, the bridge was last inspected on June 29, 2017 and found to be in fair or satisfactory conditions. The report does note that inspectors found some minor cracks and deterioration. Scheinfeld said the bridge is inspected every two years, as per federal standards, and was due for re-inspection in June of this year.