Graham Dam, located in Warren County, Iowa, is a privately owned structure with a primary purpose of fire protection, stock, or small fish pond. Built in 1968 by the USDA NRCS, this earth dam stands at a height of 25 feet and spans a length of 1065 feet, with a storage capacity of 142 acre-feet. The dam is regulated by the Iowa DNR and is equipped with an uncontrolled spillway.

The dam, situated on TR-OTTER CREEK near RED ROCK RESERVOIR, serves multiple purposes including recreation and water supply, making it a vital resource for the surrounding community. Despite its low hazard potential, the dam is subject to regular inspections to ensure its structural integrity and safety. With a moderate risk assessment rating, efforts are in place to manage any potential risks associated with the dam.

Enthusiasts of water resources and climate will find Graham Dam to be an intriguing structure with a rich history and important role in the local ecosystem. Its design and construction by the USDA NRCS, along with its regulatory oversight by the Iowa DNR, highlight the collaborative efforts to maintain and manage water resources in the area.