Hynick Dam, located in Eddyville, Iowa, is a privately owned structure designed by the USDA NRCS for fire protection, stock, or small fish pond purposes. Completed in 1963, this earth dam stands at a height of 29 feet with a length of 352 feet, creating a reservoir with a storage capacity of 95 acre-feet. Situated on the TR-Des Moines River, the dam serves as a vital resource for the local community, offering water for various needs.

The dam, regulated by the Iowa DNR, has a low hazard potential and is classified as "Not Rated" in terms of condition assessment. Despite not having a recent inspection date, the structure's risk assessment is moderate (3), indicating a need for ongoing monitoring and management. While there have been no modifications to the dam since its completion, its historical significance as a water resource for fire protection and stock maintenance highlights its importance in the region.

With a surface area of 4 acres and a drainage area of 0.13 square miles, Hynick Dam plays a crucial role in water management and conservation efforts in Mahaska County, Iowa. Its presence on the TR-Des Moines River contributes to the overall ecosystem health and provides a sustainable water source for local wildlife and agricultural activities. As climate enthusiasts and water resource advocates, it is essential to recognize the significance of structures like Hynick Dam in maintaining ecological balance and supporting community needs in a changing environment.