Rock Creek Dam, located in Lynnville, Iowa, is a state-regulated structure designed by Bauer Engineering Inc. The dam, situated on Rock Creek, serves primarily for recreational purposes and boasts an earth dam type with a height of 33 feet and a length of 1500 feet. With a storage capacity of 13,700 acre-feet and a surface area of 640 acres, Rock Creek Dam provides essential water resources for the surrounding area while offering recreational opportunities for visitors.

Despite its significant hazard potential, Rock Creek Dam has been assessed as satisfactory in condition as of May 2016. The dam features an uncontrolled spillway type with a width of 200 feet, ensuring efficient water release during periods of high flow. Managed by the Iowa Department of Natural Resources, the dam undergoes regular inspections every five years to uphold safety standards and mitigate potential risks. With a moderate risk assessment rating, Rock Creek Dam remains a crucial infrastructure for water resource management and climate resilience in Jasper County.

In the event of an emergency, the dam's emergency action plan (EAP) status and preparedness remain unspecified, highlighting the importance of ongoing risk management measures. With no associated federal agency involvement, Rock Creek Dam showcases the state's commitment to regulating and maintaining essential water infrastructure for both recreational and environmental purposes. As a key component of the local watershed, Rock Creek Dam stands as a testament to effective water resource management in Iowa's diverse landscape.