Stan Musial Veterans Memorial Bridge

St. Louis, Missouri, and St. Clair County, Illinois

Helping the Missouri-Illinois bridge open at nearly half its original estimate

•    Leaner design completed in 15 months
•    Unique seismic analysis reduces loading
•    Alternative technical concept yields savings, efficiencies

The Missouri and Illinois departments of transportation retained HNTB as lead designer on the Stan Musial Veterans Memorial Bridge — a 1,500-foot Mississippi River crossing — and its approach structures between St. Louis, Missouri, and St. Clair County, Illinois.

To bring the project’s cost within budget, HNTB identified the real needs and aligned them with budgetary and schedule constraints. Using its understanding of wind effects, river currents and soil on Mississippi Bridges and its long history of cable-stayed bridge work, HNTB produced an iconic design in 11 months. 

To deliver a safer bridge but avoid unnecessary costs, HNTB used the conditional mean spectrum, a seismic analysis commonly used on buildings but never on a bridge. And, by introducing the alternative technical concept contracting method, HNTB helped the bi-state owners increase competition, efficiencies and constructability.

Smooth construction led to on-time, on-budget delivery of the third-longest cable-stayed bridge in the United States.