Rooks Dam, located in Union, Iowa, along the TR-Iowa River, was completed in 1959 with a primary purpose of fire protection, stock, or small fish pond. The dam, owned privately, stands at a height of 38 feet and spans 451 feet in length, with a storage capacity of 140 acre-feet. With a low hazard potential and a moderate risk assessment rating of 3, Rooks Dam is regulated, permitted, inspected, and enforced by the Iowa Department of Natural Resources.

Constructed by the USDA NRCS, this earth dam with a soil foundation serves as a crucial water resource for the surrounding area, offering essential fire protection and agricultural support. Despite not being rated for condition assessment, the dam continues to play a vital role in managing water resources in the region. With its uncontrolled spillway and limited drainage area of 0.4 square miles, Rooks Dam provides a sustainable solution for water storage and management in Hardin County, Iowa.

As an integral part of the local water infrastructure, Rooks Dam ensures the safety and well-being of the community by mitigating flood risks and providing a reliable source of water for various purposes. With its strategic location and efficient design, this dam stands as a testament to effective water resource management and climate resilience efforts in the region. For water resource and climate enthusiasts, Rooks Dam serves as a fascinating case study in sustainable water infrastructure development and management.