Henry Dam 1, located in Sioux County, Nebraska, is a private earth dam primarily used for irrigation purposes. Built in 1979 by the USDA NRCS, this dam stands at a height of 20 feet and has a storage capacity of 275 acre-feet. The dam spans 933 feet in length and sits on a foundation of soil, with a core made of stone.

Despite its low hazard potential, Henry Dam 1 is currently rated as being in poor condition, with its last inspection in April 2019 revealing the need for maintenance and repairs. The state-regulated dam is under the jurisdiction of the Nebraska Department of Natural Resources, which oversees its permitting, inspection, and enforcement. The dam's location along the TR-Indian Creek tributary highlights its importance in managing water resources for agriculture in the region.

Water resource and climate enthusiasts interested in the sustainability and management of dams like Henry Dam 1 will find this structure a focal point for discussions on infrastructure maintenance, regulatory oversight, and the role of irrigation in the local ecosystem. With its historical significance and vital function in supporting agricultural activities, Henry Dam 1 serves as a reminder of the complex interplay between human development and natural resources in the face of changing environmental conditions.