East Willow Creek Da-1, located in Preston, Minnesota, is a local government-owned dam designed by the USDA NRCS to reduce flood risks along the Willow Creek-TR river. Completed in 1958, this earth dam stands at a height of 40 feet and has a storage capacity of 218 acre-feet. Despite its low hazard potential and satisfactory condition assessment, the dam is regulated by the Minnesota Department of Natural Resources and undergoes regular inspections, enforcement, and permitting to ensure public safety and environmental protection.

The primary purpose of East Willow Creek Da-1 is flood risk reduction, with a focus on controlling water levels and minimizing potential damages during periods of heavy rainfall. The dam's spillway is uncontrolled, emphasizing the importance of proper management to prevent overflow and maintain stability. With a drainage area of 1.2 square miles, this dam plays a crucial role in managing water flow and protecting surrounding communities from the impacts of flooding. Its moderate risk assessment underscores the need for ongoing monitoring and risk management measures to safeguard against potential threats.

In the event of an emergency, East Willow Creek Da-1 is equipped with uncontrolled outlet gates, although details regarding emergency action plans and inundation maps are currently unavailable. Despite its age, this dam continues to fulfill its purpose effectively, serving as a vital infrastructure asset for flood control in Fillmore County, Minnesota. With a dedicated regulatory agency and a history of satisfactory inspections, East Willow Creek Da-1 stands as a testament to the importance of proactive water resource management and climate resilience in mitigating natural disasters.