Ralston Subwatershed Site 5-2, located in Washta, Iowa, is a crucial water resource managed by the local government with oversight from the Iowa Department of Natural Resources. This site, designed by USDA NRCS in 1969, serves multiple purposes including fire protection, stock watering, and flood risk reduction. The earth dam, standing at a height of 24 feet and spanning 757 feet in length, provides a storage capacity of 85 acre-feet and covers a surface area of 3 acres.

Despite its low hazard potential, the dam at Ralston Subwatershed Site 5-2 has not been rated for its condition. The risk assessment for this site is moderate, indicating a need for ongoing monitoring and potential risk management measures. The dam's spillway type is uncontrolled, and it is located on the TR-Little Sioux River within the Rock Island District. With a drainage area of 0.38 square miles, this site plays a crucial role in managing water resources and mitigating flood risks in the region.