Mc Grew Brothers Dam, located in Mills County, Iowa, was completed in 2001 with a primary purpose of fire protection, stock, or small fish pond. Owned privately and regulated by the Iowa Department of Natural Resources, this earth dam stands at a height of 35 feet and spans 545 feet in length. With a storage capacity of 98 acre-feet and a surface area of 6.3 acres, the dam serves as a crucial water resource for the surrounding area.

The dam, designed by NRCS, is situated on the TR-West Nishnabotna River and is equipped with an uncontrolled spillway and soil foundation. Despite a low hazard potential and a moderate risk assessment, the condition of the dam is currently unrated. While the dam has not been modified over the years and does not feature outlet gates or associated structures, it plays a vital role in water management and conservation efforts in the region. With state permitting, inspection, and enforcement in place, Mc Grew Brothers Dam continues to serve its purpose effectively while ensuring the safety and well-being of the community.