Kennedy & Johns Dam is a private earth dam located in Plymouth County, Iowa, along the TR-Floyd River. Constructed in 1975 by the USDA NRCS, this dam serves multiple purposes including fire protection, stock, and small fish pond. With a height of 40 feet and a length of 520 feet, Kennedy & Johns Dam has a storage capacity of 178 acre-feet and a surface area of 7.5 acres. It is regulated by the Iowa Department of Natural Resources and is considered to have a significant hazard potential.

Despite being uncontrolled, the spillway type of Kennedy & Johns Dam ensures the safety of the surrounding area in case of overflow. The dam, which is situated in a rural area near the city of James, provides essential water resources for agricultural and environmental purposes in the region. While the condition assessment is currently not rated, the risk assessment indicates a moderate level of risk (3), prompting the need for ongoing monitoring and potential risk management measures to ensure the safety and functionality of the dam for years to come.