Big Park Watershed Site D-2, located in Crawford County, Iowa, is a vital water resource managed by the local government for fire protection, stock, and small fish pond purposes. This Earth-type dam, completed in 1960 by USDA NRCS, stands at 36 feet tall and stretches 374 feet in length, with a storage capacity of 32 acre-feet. The dam overlooks the TR-Boyer River, serving as a crucial flood risk reduction measure for the surrounding area.

Despite its low hazard potential, Big Park Watershed Site D-2 is regulated by the Iowa Department of Natural Resources, ensuring its compliance with state permitting, inspection, and enforcement requirements. The dam's condition assessment is currently not rated, highlighting the need for further evaluation and risk management measures. With a drainage area of 0.24 square miles and a moderate risk level, this site presents an opportunity for water resource and climate enthusiasts to engage in the conservation and protection of this valuable watershed.