Isu Dam, located in Chariton, Iowa, was completed in 1958 by the USDA NRCS and is owned and regulated by the Iowa Department of Natural Resources. This earth dam, standing at a height of 24 feet and a length of 426 feet, serves primarily for fire protection and as a small fish pond. With a storage capacity of 104 acre-feet and a surface area of 9 acres, the dam plays a crucial role in water management for the Chariton River.

Despite being categorized as low hazard potential and not yet rated for condition assessment, the dam poses a moderate risk, prompting the need for risk management measures. The spillway type is uncontrolled, and the dam has not been modified since its completion. Although the last inspection was conducted in 1960, the dam is still in operation and under state jurisdiction with regular inspection and enforcement in place, ensuring its safety and functionality for the surrounding area.

Water resource and climate enthusiasts will find Isu Dam an intriguing structure in the landscape of Lucas County, Iowa. With its significant role in fire protection and water storage, the dam stands as a testament to sustainable water management practices in the region. Its location on the Chariton River adds to its importance in flood control and ecosystem conservation efforts.