Knapp Dam, located in Davis County, Iowa, serves multiple purposes including fire protection and providing a stock or small fish pond. Constructed in 1979, this earth dam stands at a height of 25 feet and spans 360 feet in length. The dam has a normal storage capacity of 27 acre-feet and a maximum storage capacity of 41 acre-feet, with a surface area of 3.2 acres and a drainage area of 0.07 square miles.

Managed by a private owner and regulated by the Iowa Department of Natural Resources, Knapp Dam has a low hazard potential and is currently rated as "Not Rated" in terms of its condition. The dam is inspected, permitted, and enforced by state agencies, ensuring its safety and compliance with regulations. With a moderate risk assessment score of 3, Knapp Dam remains a vital structure for water resource management in the area.

Situated along the TR-Fabius Creek, Knapp Dam plays a crucial role in water conservation and management efforts in the region. With its strategic location and multiple benefits, including flood protection and wildlife habitat enhancement, Knapp Dam stands as a notable example of sustainable water resource infrastructure in Iowa.