The Mississippi River, a key feature of North America's geography, flows by St. Louis, a city with a rich history connected to the river. St. Louis, known as the "Gateway to the West," has been a major port on the Mississippi since the 19th century. The river has played a significant role in the city's economy, culture, and identity. It's also a site where significant efforts in hydrological forecasting and flood management take place, reflecting the river's dynamic nature and its impact on the surrounding communities. The Mississippi at St. Louis is not just a body of water; it's a symbol of exploration, expansion, and the enduring spirit of the city.