Washington CO Road Dam 3-74-7, located in Washington County, Iowa, is a local government-owned structure designed by the Washington County Engineer. Completed in 2002, this earth dam serves the primary purpose of grade stabilization along the TR- West Fork Crooked Creek. With a height of 36 feet and a length of 825 feet, the dam has a storage capacity of 634 acre-feet and a surface area of 21.9 acres.

Managed by the Iowa Department of Natural Resources, Washington CO Road Dam 3-74-7 is regulated, inspected, and enforced by state authorities to ensure its safety and functionality. The dam has a low hazard potential and is currently rated as "Not Rated" in terms of condition assessment. Despite its moderate risk level, the dam has not been assigned a Dam Safety Action Classification (DSAC) date, indicating that it is currently stable and does not pose an immediate threat to public safety.

Overall, Washington CO Road Dam 3-74-7 plays a crucial role in managing water resources and protecting infrastructure in the Coppock area. With its focus on grade stabilization and low hazard potential, this earth dam exemplifies the importance of sustainable water management practices in the face of climate change and increasing water demands.