Riley Horn Dam, also known as Riley Horn Reservoir, is a gravity dam located in Malheur, Oregon, along Fort Creek. Built in 1961 and owned by the Bureau of Land Management, this federal structure serves primarily as a water supply source with a storage capacity of 385 acre-feet. The dam stands at a structural height of 12 feet with a hydraulic height of 9 feet, spanning 610 feet in length and covering a surface area of 65.1 acres.

Despite its low hazard potential and not being rated for its condition, Riley Horn Dam plays a crucial role in water resource management in the region. Operated and funded by the Bureau of Land Management, the dam has not undergone any significant modifications over the years and does not have an Emergency Action Plan in place. Although the dam has not been inspected since September 2018, its low-risk status and minimal impact on the surrounding area make it a reliable water supply infrastructure for the community.

Enthusiasts of water resources and climate in Oregon may find Riley Horn Dam an interesting subject for exploration and study. With its unique design features, historical significance, and the role it plays in maintaining water supply in the region, this federal structure offers valuable insights into the management of water resources and infrastructure in a changing climate. Further research and analysis of Riley Horn Dam could provide a deeper understanding of the challenges and opportunities associated with water supply systems in the face of climate change.