Rodney Subwatershed Site 2-1, located in Monona, Iowa, is a water resource structure designed by the USDA NRCS to serve various purposes including fire protection, stock, small fish pond, and flood risk reduction. Completed in 1970, this earth dam stands at a height of 32 feet and has a storage capacity of 20 acre-feet. The dam is regulated by the Iowa DNR and is used for water management in the Little Sioux River watershed.

Despite its low hazard potential and moderate risk assessment, Rodney Subwatershed Site 2-1 has not been rated for its condition assessment. The dam's spillway is uncontrolled, and its inspection frequency, emergency action plan, and risk management measures remain unspecified. The structure's primary owner is the local government, with no federal agency involvement in its ownership, funding, or construction. Overall, Rodney Subwatershed Site 2-1 plays a crucial role in water resource management in the region and contributes to the overall resilience of the watershed.