Williams Dam, located in Redfield, Iowa, is a privately owned structure with a primary purpose of fire protection, stock, or small fish pond. Built in 2003 by NRCS, this earth dam stands at a height of 30 feet and spans 355 feet in length, with a storage capacity of 56 acre-feet. The dam sits on the Tr- Long Branch river and is regulated by the Iowa Department of Natural Resources.

With a low hazard potential and a moderate risk rating, Williams Dam has not been officially rated for its condition. Despite this, the dam is inspected, permitted, and enforced by the state, ensuring its safety and compliance with regulations. The surrounding area covers 3.8 acres and has a drainage area of 0.18 square miles, making it a vital water resource in the region for fire protection and irrigation purposes.

Although the dam is uncontrolled and lacks outlet gates, it serves as a critical structure for water management in the area. The dam's risk management measures and emergency action plan status are unknown, highlighting the importance of continued monitoring and assessment to ensure the safety and sustainability of Williams Dam for both water resource and climate enthusiasts.