Il & Ic Dam, located in Jefferson, Iowa, along TR-Cedar Creek, is a private dam with a primary purpose of recreation. Constructed in 1992 with a height of 8 feet and a length of 4460 feet, this earth dam provides a storage capacity of 98 acre-feet and covers a surface area of 20.8 acres. While the dam is regulated by the Iowa DNR and subject to state jurisdiction, it has a low hazard potential and is currently rated as 'Not Rated' in terms of condition assessment.

Despite its moderate risk level, Il & Ic Dam plays a crucial role in providing recreational opportunities for the local community in Oakland Mills. With a scenic setting and easy access, the dam offers a peaceful retreat for water resource and climate enthusiasts to enjoy activities such as fishing, boating, and wildlife observation. As a well-maintained structure, the dam is a valuable asset for both the environment and the community, contributing to the overall sustainability and resilience of the region's water resources.