Washington CO Road Dam 26-74-9, located in Coppock, Iowa, is a local government-owned structure designed by the Washington County Engineer. Completed in 2005, this earth dam stands at a height of 31 feet and spans 750 feet along TR- Honey Creek. Its primary purpose is grade stabilization, serving to control water flow and prevent erosion in the area. With a normal storage capacity of 11 acre-feet and a drainage area of 0.12 square miles, this dam plays a crucial role in managing water resources in the region.

Managed by the Iowa Department of Natural Resources, Washington CO Road Dam 26-74-9 is classified as a low hazard potential structure with a moderate risk assessment rating. While the dam is not currently rated for condition assessment, it undergoes state inspection, permitting, and enforcement to ensure its safety and functionality. The spillway, with a width of 3 feet, is uncontrolled, and the dam is constructed on a soil foundation, providing stability for its operations. Despite its low hazard potential, the dam contributes to the overall water management efforts in Washington County and helps mitigate potential risks associated with flooding and erosion.

This dam, situated within the Rock Island District, serves as a vital infrastructure for water resource management in the area. While it has not been modified since its completion, the structure continues to fulfill its intended purpose of grade stabilization along TR- Honey Creek. With its strategic location and design, Washington CO Road Dam 26-74-9 exemplifies the importance of maintaining and monitoring dams to safeguard water resources and address climate-related challenges in the region.