Lehmann Detention, located in Dawson, Minnesota, is a rockfill dam designed for flood risk reduction on the Lac Qui Parle-TR river. Owned by a private entity, this dam stands at a height of 17.5 feet and has a storage capacity of 52 acre-feet. With a low hazard potential and a condition assessment that is currently not rated, Lehmann Detention plays a crucial role in safeguarding the surrounding area from potential flooding events.

Managed by the Minnesota Department of Natural Resources, Lehmann Detention is subject to state regulation, permitting, inspection, and enforcement. Despite not having a designated year of completion, this dam provides vital flood protection for the residents of Lincoln County, Minnesota. With its primary purpose being flood risk reduction, Lehmann Detention serves as a key infrastructure for managing water resources in the region, ensuring the safety and security of the local community.

The dam, with a normal storage capacity of 6 acre-feet and a surface area of 3 acres, is part of the Omaha District under the US Army Corps of Engineers. With no associated structures and a relatively low inspection frequency of 8 years, Lehmann Detention is a critical component of the water resource management system in Minnesota. As climate change continues to impact weather patterns, structures like Lehmann Detention will play an increasingly vital role in protecting communities from the risks of flooding and ensuring sustainable water management practices.