Mississippi River Lock and Dam 12, also known as Pool 12, is a federal structure located in Bellevue, Iowa, along the Mississippi River. Built in 1938 by the US Army Corps of Engineers, this concrete dam serves primarily for navigation purposes, with a length of 8,577 feet and a hydraulic height of 9 feet. It features a single lock with dimensions of 600 feet in length and 110 feet in width, facilitating the passage of vessels along the river.

With a significant hazard potential and a moderate risk assessment rating, the dam is managed by the US Army Corps of Engineers to address flood risk associated with the structure. Regular monitoring, maintenance, and engagement with local emergency managers are key components of the risk management measures implemented to ensure the dam's structural integrity and the safety of downstream communities. In the event of severe weather or increased water levels, the dam may release water to manage water levels and prevent potential issues.

As a critical infrastructure along the Mississippi River, Mississippi River Lock and Dam 12 plays a vital role in water resource management and climate adaptation efforts in the region. By employing proactive risk management strategies and continuously updating emergency action plans, the US Army Corps of Engineers ensures the safe operation of the dam and enhances preparedness for potential dam-related emergencies.