Ripperger Dam, located in Union County, Iowa, was completed in 1983 and is primarily used for fire protection, stock, and small fish pond purposes. Owned privately, the dam is regulated by the Iowa Department of Natural Resources and is subject to state inspections and enforcement. Designed by the USDA NRCS, this earth dam stands at a height of 32 feet and has a length of 285 feet, with a storage capacity of 26 acre-feet.

Situated on the TR-Twomile Creek, Ripperger Dam serves as a crucial water resource in the region, providing a surface area of 1.5 acres and normal storage of 14 acre-feet. With a low hazard potential and a moderate risk assessment, the dam is categorized as not rated in terms of condition assessment. Despite lacking an Emergency Action Plan and inundation maps, the dam meets regulatory guidelines and is overseen by the Iowa DNR for any necessary risk management measures.

Supported by the Natural Resources Conservation Service, Ripperger Dam plays a vital role in water management and conservation efforts in the area. With its controlled spillway and soil foundation, the dam serves as a significant infrastructure for the local community, contributing to the overall resilience and sustainability of water resources in Union County, Iowa.