Winnibigoshish Dam - Dike 1, located in Cass County, Minnesota, was completed in 1884 with a primary purpose of water supply. The dam, made of earth and stone materials, stands at a height of 5 feet and a length of 50 feet, with a storage capacity of 550,000 acre-feet. Although the dam no longer serves its original function of preventing breakout flows into Portage Lake, it still plays a significant role in flood risk reduction, navigation, recreation, and wildlife conservation in the area.

Managed by the US Army Corps of Engineers, Winnibigoshish Dam undergoes regular inspections and maintenance to ensure its structural integrity and operational effectiveness. The dam poses a significant hazard potential, prompting the implementation of risk management measures that involve monitoring, prioritizing activities, and coordinating with local emergency managers to develop and update emergency action plans. Despite being effectively replaced by Highway 2, the dam continues to contribute to the overall water resource management and environmental preservation efforts in the region.

In light of the dam's historical significance and ongoing relevance, it serves as a critical component of the water infrastructure in the area and showcases the continuous efforts of the US Army Corps of Engineers in safeguarding water resources, mitigating risks, and ensuring public safety in the face of potential dam-related emergencies.