St. Louis Bay Bridge

The St. Louis Bay Bridge is a road viaduct spanning the Bay of Saint Louis and connecting Bay St. Louis and Pass Christian in Mississippi. The four-lane structure carries U.S. Route 90 traffic and includes a dedicated pedestrian and cycling path on the Gulf side.

The original bridge was destroyed by Hurricane Katrina in 2005 and rebuilt with a new structure completed in 2007. The replacement design incorporated enhanced protections against future hurricanes.

The pedestrian and cycling path on the Gulf side allows visitors to cross the bay on foot or by bicycle while enjoying water views. This passage was deliberately built into the structure to help people connect with the local coastal landscape.

Four-lane traffic moves across the structure in steady flow, especially during morning and evening rush periods. Pedestrians and cyclists can use the separate path and should prepare for sun exposure and changing weather conditions.

The structure was designed specifically with wind load requirements that exceed standard codes to withstand extreme weather events. Engineers integrated these reinforced qualities during planning to ensure the crossing's durability and safety.