Saylorville Dam, also known as Saylorville Lake, is a gravity-type dam located on the Des Moines River in Iowa. Completed in 1975 by the US Army Corps of Engineers, the dam serves primarily for flood risk reduction, but also supports recreational activities and water supply. With a height of 119 feet and a volume of 8.4 million cubic yards, the dam has a maximum storage capacity of 641,000 acre-feet and covers a surface area of 5,520 acres.

Despite the high hazard potential associated with the dam, a risk assessment conducted by the USACE in 2015 classified the risk as low due to the dam's well-designed, constructed, and maintained structure. However, there is a very remote risk of dam failure under extreme conditions, which could lead to devastating floods reaching depths greater than 15 feet in downtown Des Moines. To mitigate these risks, the USACE implements various risk management measures including regular updates to the Emergency Action Plan, coordination with state and local agencies, conducting emergency exercises, and continuous monitoring and maintenance of the dam.

In an effort to enhance communication and awareness of the dam's risks and management strategies, the USACE is developing a detailed communication plan and engaging with stakeholders, emergency managers, and the public. With a focus on proactive management and prevention measures, including updates to water control manuals and early reservoir releases, Saylorville Dam remains a crucial infrastructure for flood protection and water resource management in the region.