St. Louis

Weekend Detour Alert as McNutt Street Bridge Demolition Closes Underpass in Herculaneum

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Published on November 18, 2025
Weekend Detour Alert as McNutt Street Bridge Demolition Closes Underpass in HerculaneumSource: Unsplash/ Jamie Street

Travelers in Herculaneum, get ready for a detour this weekend. The Missouri Department of Transportation (MoDOT) has announced that McNutt Street under I-55 will be closed for a bridge demolition project. The closures will run from 9 p.m. on Friday until 5 a.m. on Monday. MoDOT has shifted traffic onto a new bridge over McNutt Street, clearing the way for the old northbound bridge to come down.

All I-55 lanes will remain open during the McNutt Street Bridge demolition, but drivers on McNutt Street will need to follow detours. West of I-55, take southbound I-55 to Veterans Blvd eastbound, then US 61/67 north, and west on McNutt Street back to northbound I-55. East of I-55, use northbound I-55 to Route Z westbound, then southbound I-55.

Detour routes aim to minimize disruption, but travelers in Herculaneum this weekend should consider alternative routes. Work is weather-dependent and may be adjusted if conditions are not suitable. Updates and recommended detours are available on MoDOT’s official website.