Fridley Dam, located on the Des Moines River in Warren County, Iowa, was completed in 1977 and is primarily used for recreation purposes. Owned by a private entity, the dam is regulated by the Iowa Department of Natural Resources and undergoes regular inspections to ensure its safety and compliance with state regulations. The earth dam stands at 40 feet high and spans 500 feet in length, with a storage capacity of 214 acre-feet and a surface area of 15.7 acres.

Despite its low hazard potential, Fridley Dam is considered to have a moderate risk level, with a risk assessment rating of 3 out of 5. The dam features an uncontrolled spillway and is situated on Otter Creek, a tributary of the Des Moines River. While the dam has not been rated for its condition, it is equipped with emergency action plans and emergency contacts, although their last update dates are not specified in the available data. Overall, Fridley Dam serves as a vital recreational resource in the area while also being closely monitored to ensure public safety and environmental protection.