Big Park Watershed Site F-1 in Crawford, Iowa, is a locally owned water management structure designed by the USDA NRCS for fire protection, stock, and small fish pond purposes. Completed in 1965, this Earth-type dam stands at a height of 35 feet and spans 395 feet, with a storage capacity of 80 acre-feet. Situated on the TR-Boyer River, this dam serves to reduce flood risks and provide recreational opportunities to the community. Despite its low hazard potential, the dam's condition assessment remains unrated, emphasizing the need for regular inspections and maintenance to ensure its long-term effectiveness.

Managed by the Iowa DNR and located in Dow City, this watershed site plays a crucial role in regulating water flow and preserving the surrounding ecosystem. With a drainage area of 0.32 square miles and a surface area of 4 acres, the dam helps control water levels and protect downstream areas from potential inundation. Although the dam's spillway is uncontrolled, its moderate risk assessment rating suggests the need for proactive risk management measures to mitigate any potential hazards and ensure the safety of the local community.

As part of the Rock Island District, Big Park Watershed Site F-1 stands as a testament to the importance of sustainable water resource management in the face of changing climate conditions. With its historical significance and ongoing role in water conservation efforts, this dam serves as a valuable asset for both flood control and recreational purposes, highlighting the vital connection between water resources and climate resilience in the region.