Dredge Dam, located in Delphos, Iowa, is a privately owned structure designed by USDA NRCS for grade stabilization along a tributary to Walnut Creek. Completed in 2013, this earth dam stands at 26 feet high and stretches 489 feet in length, providing storage capacity of 93 acre-feet for water supply and recreation purposes. The dam is regulated by the Iowa DNR and undergoes regular inspections, with a low hazard potential and a condition assessment that is currently not rated.

The dam's primary purpose is grade stabilization, with additional functions including water supply and recreation. It features stone core types and a soil foundation, with a spillway width of 20 feet and a maximum discharge capacity of 150 cubic feet per second. While the dam has not been modified since its completion, it serves as a vital infrastructure for managing water resources in the Ringgold County area. Dredge Dam exemplifies the importance of sustainable water management practices in mitigating the impacts of climate change and ensuring the resilience of local communities.