Stronger gates, stronger river: Lock and Dam 9 upgrade secures Upper Mississippi Navigation
The Upper Mississippi River lock and dam system was constructed in the 1930s, when steamboat traffic ruled the waters. Now, to keep up with the demands of the navigation industry, the district locks and dams are receiving critical infrastructure upgrades.
The Upper Mississippi River lock and dam system was constructed in the 1930s, when steamboat traffic ruled the waters. Now, to keep up with the demands of the navigation industry, the district locks and dams are receiving critical infrastructure upgrades.
