The Derby Diversion, located in Washoe County, Nevada, along the Truckee River, is a concrete arch dam completed in 1904 primarily used for irrigation purposes. Managed by the Bureau of Reclamation, this Federal-owned structure stands at 31 feet high and has a storage capacity of 2,500 acre-feet. With a low hazard potential and a very high risk assessment rating, the dam has not been assessed for its condition, emergency action plan, or risk management measures.

Despite its age, the Derby Diversion continues to play a crucial role in water resource management in the region. As a key feature along the Truckee River, it provides irrigation water to support agricultural activities in the area. The dam's controlled spillway type and lack of outlet gates indicate a basic design intended for water diversion and storage purposes. Although the structure's condition assessment is not available, its historical significance and continued operation underscore its importance in the local water infrastructure.

Water resource and climate enthusiasts can appreciate the Derby Diversion as a historic and functional piece of infrastructure that contributes to the agricultural landscape of Washoe County, Nevada. As a Federal-owned dam managed by the Bureau of Reclamation, its presence along the Truckee River highlights the ongoing efforts to manage and allocate water resources in the region. While the dam's risk assessment is noted as very high, further evaluation and updates to its emergency action plan and risk management measures may be necessary to ensure its continued safe operation in the face of potential hazards.