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I-270 North Environmental StudyI-270 Corridor Pictures

Notice of Availability of FONSI



The Environmental Assessment (EA) for one of the most travelled corridors in the St. Louis metropolitan region – I-270 – is now complete. The Missouri Department of Transportation (MoDOT) and the Federal Highway Administration (FHWA) have approved the EA for I-270 from I-70 on the west to the Chain of Rocks Bridge on the east. The I-270 North EA is the next step in addressing congestion, safety, and mobility, as well as accessibility and aging infrastructure along the interstate in north St. Louis County.

The Federal Highway Administration has issued a Finding of No Significant Impact (FONSI) for this project. People may view the document here.

The EA details the Preferred Alternative for improving the corridor and the study process. Currently MoDOT has $100 million available for the first phase of the project.



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