Johnson Dam, located in Davis County, Iowa, serves multiple purposes including fire protection, stock, and small fish pond management. Built in 1958 by the USDA NRCS, this earth dam stands at 27 feet high and spans 513 feet in length, with a storage capacity of 26 acre-feet. Situated on TR-North Fabius Creek, the dam is regulated by the Iowa Department of Natural Resources and is subject to regular inspections to ensure its safety and functionality.

Despite its low hazard potential, Johnson Dam is considered to have a moderate risk level due to its location and design characteristics. With a drainage area of 0.08 square miles, the dam plays a crucial role in managing water resources in the region. While the dam has not been rated for its condition, it remains a key asset for water management and conservation efforts in the area. Enthusiasts of water resources and climate will find Johnson Dam to be a noteworthy structure with a rich history and important role in supporting local ecosystems.