Little Trout Detention No. 1, also known as Donald Diekrager Detention, is a private-owned earth dam located in Pickwick, Minnesota. Built in 1972 by USDA NRCS, this structure serves the primary purpose of flood risk reduction along the Little Trout Creek. Standing at a height of 36 feet and stretching 684 feet in length, it offers a storage capacity of 101 acre-feet and a maximum discharge of 115 cubic feet per second.

Managed by the Minnesota Department of Natural Resources, this dam has a low hazard potential and is deemed to be in satisfactory condition as per the last inspection in April 2015. The spillway, outlet gates, and locks are all uncontrolled, with a spillway width of 100 feet. Despite its moderate risk assessment level, the dam has not been modified in recent years and meets regulatory guidelines for state permitting, inspection, and enforcement.

Water resource and climate enthusiasts will appreciate the vital role that Little Trout Detention No. 1 plays in mitigating flood risks in the region. Its strategic location, design, and operational features showcase a commitment to safeguarding communities and the environment from potential water-related hazards. As a significant part of the flood control infrastructure in Winona County, this dam stands as a testament to effective collaboration between private owners, government agencies, and design experts to ensure sustainable water management practices for the benefit of all stakeholders.