Rosener Dam, located in Vail, Iowa, is a privately owned structure designed by the Natural Resources Conservation Service (NRCS) with a primary purpose of fire protection, stock, or small fish pond. Completed in 2002, this earth dam stands at a height of 28 feet and stretches 609 feet in length, with a storage capacity of 106 acre-feet. The dam is situated on TR-King Creek and is regulated by the Iowa Department of Natural Resources, with state permitting, inspection, and enforcement in place.

With a low hazard potential and a moderate risk assessment rating, Rosener Dam serves as a crucial water resource for the surrounding area. Despite its small surface area of 6 acres and limited drainage area of 0.95 square miles, the dam plays a significant role in mitigating the risk of flooding and providing water for various purposes. While the dam's condition is currently not rated, its strategic location and design contribute to its overall effectiveness in water management and climate resilience efforts in Crawford County, Iowa.