Melvin Price Locks and Dam is a dam and two locks at river mile 200.78 on the Upper Mississippi River, about 17 miles (27 km) north of Saint Louis, Missouri.

The collocated National Great Rivers Museum  [Wikidata], explains the structure and its engineering.

Construction began in 1979, the main lock opened in 1990, and the full structure was completed in 1994.

26, demolished in 1990, and is the first replacement structure on the Upper Mississippi River nine-foot navigation project.

It is named after Illinois Congressman Charles Melvin Price.