Chimney Peak Ranch, also known as Forgotten Reservoir, is a state-regulated water structure located in Ouray, Colorado, along Nate Creek. This irrigation dam is primarily used for agricultural purposes and is classified as an earth dam with a stone core. With a height of 25 feet and a storage capacity of 50 acre-feet, the dam has a low hazard potential and a moderate risk assessment rating.

Managed by the Colorado Department of Water Resources (DWR), Chimney Peak Ranch undergoes regular inspections and enforcement to ensure its safety and compliance with state regulations. Despite its uncontrolled spillway type and lack of a condition assessment rating, the dam poses a low risk of failure. The surrounding area is considered to have a moderate risk level, but with proper risk management measures in place, the ranch continues to provide vital water resources for the local community while protecting against potential hazards.

Located within the Albuquerque District of the US Army Corps of Engineers, Chimney Peak Ranch stands as a testament to sustainable water resource management in the face of changing climates. With its strategic location and vital role in supporting agricultural activities, this dam serves as a valuable asset for both water resource enthusiasts and climate advocates seeking to protect and preserve our natural environment.