The Red Rock Dam in Southeast Des Moines and Southwest Pleasant Hill is a critical structure designed for flood risk reduction along the Des Moines River in Iowa. Completed in 1968, this gravity dam stands at 18 feet tall and spans over 7,000 feet in length. The dam is owned and operated by the US Army Corps of Engineers and serves as a key component in protecting the surrounding communities from potential flooding events.

A recent risk assessment classified the Red Rock Dam project as having a moderate risk level, primarily due to its design to withstand a 100-year flood event. However, there are concerns about potential overtopping during larger flood events, as well as the risk of seepage undermining the embankment and flood wall foundations. Despite these challenges, the remedial works project has been deemed well-designed, constructed, and maintained, with measures in place to mitigate risks and ensure the safety of nearby residents and infrastructure.

To manage and reduce risks associated with the Red Rock Dam, the US Army Corps of Engineers has implemented a comprehensive risk management plan. This includes regular updates to the Emergency Action Plan, coordination with state and local emergency management agencies, conducting emergency exercises, and engaging in communication activities with stakeholders and the public. Continuous monitoring, inspections, and maintenance activities are also carried out to ensure the integrity of the dam and remedial works project. Additionally, updates to the Water Control Manual for Lake Red Rock aim to improve reservoir management and prevent larger-magnitude flooding events.