South Dakota Department of Transportation’s Lieutenant Commander John C. Waldron Memorial Bridge replaced aging infrastructure on a critical Missouri River crossing between Pierre and Fort Pierre—one of only five links between eastern and western South Dakota—with a safer, more accessible structure. The original structure – which carries nearly 17,000 vehicles per day, more than the combined populations of both cities – featured narrow shoulders and limited access for pedestrians and bicyclist and suffered from steel corrosion and concrete deterioration. The $50 million bridge replacement project improved safety, mobility, and accessibility while maintaining the previous structure’s overall design features to reflect the surrounding communities. Beyond its economic importance, the rebuilt bridge plays a vital role in the daily lives of residents on both sides of the river. Community members rely on this crossing for access to work, school, healthcare, shopping, and other essential services. The updated design enhances traffic flow, safety, and reliability – particularly during winter conditions – ensuring dependable, year-round connectivity between the two communities. Funded partly through by federal aid formula funds as well as an Infrastructure for Rebuilding America grant, the new bridge has an estimated 100‑year service life and includes a 12‑foot shared-use path, scenic overlooks, plazas, decorative lighting, and enhanced pedestrian connections along the Missouri River corridor.