Located in Monona, Iowa, the Arcola Subwatershed Site 2-3090 is a crucial water resource managed by the local government for fire protection, stock, and small fish pond purposes. Built in 1965 by the USDA NRCS, this earth dam stands at a height of 27 feet and has a storage capacity of 19 acre-feet. Situated in the TR- Little Sioux River watershed, this dam serves the important function of flood risk reduction in the area.

With a low hazard potential and a moderate risk assessment rating, the Arcola Subwatershed Site 2-3090 is regulated by the Iowa DNR and inspected regularly for compliance. While its condition is not currently rated, the dam's purpose and design make it a valuable asset for water management in the region. As climate change continues to impact water resources, this site plays a critical role in mitigating flood risks and supporting local water needs.