Rio is a privately owned hydroelectric dam located on the Mongaup River in Millrift, Sullivan County, New York. Built in 1927 by Chas. T. Main, Inc., this gravity dam stands at a towering height of 101 feet and stretches across 1487 feet. With a storage capacity of 15,037 acre-feet and a maximum discharge of 56,700 cubic feet per second, Rio plays a crucial role in both hydroelectric power generation and recreational activities in the area.

Managed by the Federal Energy Regulatory Commission (FERC), Rio poses a high hazard potential due to its size and location. Despite its age, the dam's condition assessment is currently listed as "Not Available," indicating a need for further evaluation and potential maintenance. The emergency action plan (EAP) for Rio was last revised in November 2020, ensuring that proper guidelines are in place in case of a critical event. With a moderate risk rating of 3, ongoing risk management measures are essential to ensure the safety and stability of this vital water resource infrastructure.

Overall, Rio stands as a significant landmark in the water resource and climate landscape, serving as both a source of renewable energy and a recreational destination. As climate change continues to impact water resources and infrastructure, it is crucial to monitor and maintain dams like Rio to ensure their resilience and sustainability for future generations. The collaboration between private ownership, state jurisdiction, and federal regulation highlights the interconnected efforts needed to protect and manage our vital water resources effectively.