Big Wyacondah Watershed Site 28, located in Iowa, is a key water resource managed by the local government for fire protection, stock, and small fish pond purposes, as well as flood risk reduction. Built in 1976 by USDA NRCS, this earth dam stands at 29 feet tall and spans 450 feet, with a storage capacity of 65 acre-feet. The dam serves the TR-SOUTH WYACONDA river or stream, providing critical water management in the region.

Despite its modest size, Big Wyacondah Watershed Site 28 plays a vital role in the local ecosystem and community resilience. The dam's low hazard potential and moderate risk assessment make it a reliable infrastructure for water control and conservation. Managed by the Iowa DNR, the dam undergoes regular state inspections, enforcement, and permitting, ensuring its structural integrity and compliance with regulatory standards.

With a surface area of 9 acres and a drainage area of 0.23 square miles, Big Wyacondah Watershed Site 28 contributes to flood risk reduction efforts and water supply management in the region. Its uncontrolled spillway, soil foundation, and location within the Kansas City District highlight the intersection of water resource management, climate resilience, and community safety in the face of changing environmental conditions.