The primary purpose of the lock and dam system on the Mississippi River is navigation.

The lock and dam system on the Mississippi River is designed primarily to facilitate navigation along this vital waterway. By creating a series of controlled water levels, these structures allow vessels to transit through varying elevations, ensuring safe and efficient transportation of goods. The system enhances commercial shipping capabilities, supporting the economy by connecting inland ports to global markets. Additionally, it helps manage water flow and provides opportunities for recreational activities along the river.