Gibbs Dam, located in Grand River, Iowa, was completed in 1959 by the USDA NRCS and serves multiple purposes including fire protection, stock watering, and creating a small fish pond. The earth dam stands at 20 feet high and stretches 514 feet in length, with a storage capacity of 87 acre-feet and a surface area of 9 acres. Situated on TR-Marvel Creek, the dam is regulated by the Iowa DNR and undergoes regular inspections to ensure its safety and functionality.

Despite its low hazard potential, Gibbs Dam is considered to have a moderate risk level with a rating of 3. While the dam has not been rated for its condition, it continues to serve its intended purposes effectively. The spillway type is uncontrolled, and the dam is built on a soil foundation, emphasizing its reliance on natural resources for stability. The surrounding area benefits from the water resource provided by the dam, contributing to the local ecosystem and agricultural activities in Adair County.