Borgstrom-Erin Prairie Twn is a privately owned dam located in St. Croix, Wisconsin, designed by the USDA NRCS to reduce flood risk in the area. Completed in 1973, this Earth-type dam stands at 29 feet tall with a length of 540 feet, providing a storage capacity of 230 acre-feet. The dam is regulated by the Wisconsin Department of Natural Resources and undergoes regular inspections to ensure its safety and functionality.

Situated on a tributary to the Willow River, Borgstrom-Erin Prairie Twn serves as a crucial infrastructure for flood risk reduction in the region. With a low hazard potential but moderate risk assessment, this dam plays a key role in managing water resources and protecting surrounding communities from potential inundation. Despite its important function, the condition assessment of the dam remains unrated, highlighting the need for continued monitoring and maintenance to ensure its effectiveness in the face of changing climate conditions.

Managed by the Natural Resources Conservation Service, Borgstrom-Erin Prairie Twn operates an uncontrolled spillway and has a maximum discharge capacity of 160 cubic feet per second. With a focus on flood risk reduction, this dam serves as a vital piece of infrastructure in the region's water resource management strategy, contributing to overall resilience in the face of climate challenges and potential extreme weather events.