The northbound I-170 exit ramp to westbound I-70 will close for bridge work this weekend, the Missouri Department of Transportation announced on Thursday.

The closure of the ramp, which is Exit 7C and labeled "STL Airport," will begin on Sept. 19 at 9 p.m. The exit will reopen on Sept. 22 at 5 a.m.

All work is weather permitting.

The exit was previously closed in August and in July for bridge work.

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