Simmering Dam, located in Washington, Iowa, serves multiple purposes including fire protection, stock, and a small fish pond. Built in 1976 by the USDA NRCS, this earth-type dam stands at a height of 25 feet and spans 330 feet in length. With a storage capacity of 41 acre-feet, the dam sits on the TR-South Fork Long Creek, providing essential water resources for the surrounding area.

Managed by a private owner, Simmering Dam is regulated by the Iowa Department of Natural Resources, ensuring that it meets state inspection and enforcement standards. Despite its low hazard potential, the dam poses a moderate risk and is categorized as not rated in terms of condition assessment. Located near the Mississippi River, this structure plays a crucial role in water resource management and climate resilience efforts in the region.

As a key feature in the local watershed, Simmering Dam contributes to flood control and water supply management. With its uncontrolled spillway type and moderate risk assessment, this dam underscores the importance of sustainable water infrastructure for both agricultural and environmental purposes. For water resource and climate enthusiasts, understanding the significance of structures like Simmering Dam is essential in promoting resilient and adaptive water management practices in the face of a changing climate.