Dimmitt Dam, located in Wapello County, Iowa, is a privately owned structure with a primary purpose of serving as a fire protection, stock, or small fish pond. Built in 1965 by the USDA NRCS, this earth dam stands at a height of 20 feet and stretches 431 feet in length, with a storage capacity of 78 acre-feet. The dam, situated on TR-Cedar Creek, is regulated by the Iowa DNR and is designed to withstand low hazard potential.

Despite its relatively low hazard potential, Dimmitt Dam poses a moderate risk, with a risk assessment rating of 3. The dam has not been rated for its condition assessment, and the last inspection took place in January 1990. While the dam does not have outlet gates or locks, it features an uncontrolled spillway. The surrounding area covers 4.7 acres, with a drainage area of 0.51 square miles, making it a key resource for water conservation in the region. Enthusiasts of water resources and climate will find Dimmitt Dam a notable structure for its historic significance and ecological impact in the area.