The Redwood River, also known as Marshall Dam, is a vital water resource in Lyon, Minnesota, managed by the local government with regulatory oversight from the Minnesota Department of Natural Resources - Ecological and Water Resources Division. This gravity dam, completed in 1963 by the USCOE, serves the primary purpose of flood risk reduction for the surrounding area. With a height of 27 feet and a storage capacity of 450 acre-feet, the dam plays a crucial role in managing the flow of the river, which has a drainage area of 260 square miles.

Located in the city of Marshall, Minnesota, the Redwood River dam has a satisfactory condition assessment and a significant hazard potential, emphasizing the importance of regular inspections and maintenance. The last inspection in March 2017 revealed that the dam meets regulatory guidelines, but ongoing risk management measures are necessary to address moderate risk levels. The dam does not have associated locks or spillway controls, with a spillway width of zero, highlighting the need for careful monitoring of water levels and discharge rates during periods of high flow.

For water resource and climate enthusiasts, the Redwood River dam presents a fascinating case study in flood risk reduction and water management. As a critical infrastructure project with a long history of service to the community, this dam exemplifies the need for proactive monitoring and maintenance to ensure its continued effectiveness in protecting lives and property from flooding events. The collaboration between local government, state agencies, and the USCOE underscores the importance of multi-level cooperation in safeguarding water resources for future generations.