The Rock River Water Reclamation District Excess Flow Basin Dam, located in Rockford, Illinois, serves as a critical structure in managing excess water flow from the Rock River. Completed in 2016, this earth dam stands at a height of 8 feet and spans 2600 feet in length, with a storage capacity of 42 acre-feet. The dam's primary purpose is categorized as "Other," with a high hazard potential due to its proximity to the Rock River.

Managed by a public utility, the dam is regulated and inspected by the Illinois Department of Natural Resources (IDNR). With a spillway width of 15 feet and an uncontrolled spillway type, the dam's risk assessment is rated as moderate. The Emergency Action Plan (EAP) for the dam was last revised in September 2018, ensuring preparedness for any potential emergencies. Water resource and climate enthusiasts can appreciate the important role this dam plays in flood control and water management along the Rock River in Winnebago County.