Crystal Lake Sediment Control Dam, located in Crystal Lake, Iowa, was completed in 2003 and is owned by the Iowa Department of Natural Resources (DNR). This earth dam stands at a height of 27 feet and has a length of 625 feet, with a storage capacity of 148 acre-feet and a surface area of 9.7 acres. The dam serves the primary purpose of sediment control on the Tr- West Fork Iowa River, within a drainage area of 0.36 square miles.

Managed by the Iowa DNR, the dam is regulated, permitted, inspected, and enforced by the state agency. With a low hazard potential and a satisfactory condition assessment as of June 2019, the risk assessment for the dam is moderate. The spillway type is uncontrolled, with a width of 4 feet, and the dam is located in a state-regulated jurisdiction, ensuring compliance with safety and environmental standards.

Despite being a modest-sized structure, Crystal Lake Sediment Control Dam plays a crucial role in maintaining water quality and sediment control in the area. Climate and water resource enthusiasts will appreciate the dam's design and functionality in mitigating erosion and protecting the water quality of the Tr- West Fork Iowa River.