Miller Dam, located in Coralville Reservoir, Iowa, was completed in 1971 by the USDA NRCS and serves as a private water resource for fire protection, stock, and small fish pond purposes. The earth dam stands at 29 feet tall and stretches 442 feet long, with a storage capacity of 99 acre-feet and a surface area of 6.5 acres. Despite its low hazard potential, the dam is regulated by the Iowa DNR and undergoes regular inspections to ensure its structural integrity and safety.

With its location on TR-Knapp Creek and proximity to the city of Coralville, Miller Dam plays a crucial role in managing water resources in Johnson County. While the dam has not been modified in recent years and is currently rated as "Not Rated" in terms of condition assessment, there is a moderate risk level associated with the structure. This suggests the need for continued monitoring and possibly the implementation of risk management measures to ensure the dam's long-term viability and ability to withstand potential climate impacts.

Overall, Miller Dam serves as a vital water management infrastructure in the region, providing essential services for both agricultural and environmental purposes. As a privately owned dam, it falls under state jurisdiction and is subject to regulations set by the Iowa DNR. Its low hazard potential and moderate risk level highlight the importance of ongoing maintenance and monitoring to safeguard against any potential threats to the surrounding community and water resources.