Agate Dam, located in Sioux County, Nebraska, is a federal-owned structure designed by the USDA NRCS for fire protection, stock, and small fish pond purposes. Completed in 1936, this earth dam stands at a height of 20 feet and spans 696 feet in length, with a storage capacity of 206 acre-feet. The dam's primary source agency is the state of Nebraska, and it is regulated by the Nebraska Department of Natural Resources.

Despite its low hazard potential, Agate Dam has been assessed as being in poor condition as of August 2019. The dam's inspection frequency is every 5 years, with the last inspection conducted in August 2019. The dam lacks an emergency action plan and updated emergency contacts, raising concerns about its readiness in the event of a disaster. While the risk assessment and management measures for the dam are currently unknown, its location on TR-Long Branch Creek and its purpose for fire protection highlight its importance in water resource management and climate resilience efforts in the region.

Water resource and climate enthusiasts interested in Agate Dam will find it to be a crucial asset for fire protection and water storage in Sioux County, Nebraska. With a storage capacity of 206 acre-feet and a maximum discharge of 5800 cubic feet per second, the dam plays a significant role in managing water resources in the area. However, its poor condition assessment and lack of updated emergency preparedness raise concerns about its long-term sustainability and resilience to climate-related challenges. As efforts to address these issues continue, Agate Dam remains a focal point for enhancing water resource management and climate adaptation strategies in the region.