Little Hyatt Dam

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Little Hyatt Dam, also known as Little Hyatt Reservoir, is a captivating federal-owned structure located in Jackson, Oregon, along the Keene Creek. Managed by the Bureau of Land Management, this arch-type dam stands at a hydraulic height of 18 feet and has a structural height of 18 feet, with a length of 77 feet. The reservoir has a storage capacity of 59 acre-feet and covers a surface area of 10.9 acres, making it a popular destination for recreational activities.

Despite its low hazard potential, the dam is rated as having a poor condition assessment, with the last inspection conducted in July 2020. It has a moderate risk assessment rating of 3, indicating some level of vulnerability. The dam has not been modified in recent years, with the last modification dating back to 2008 when the foundation was addressed. With no outlet gates and an uncontrolled spillway, the dam relies on natural overflow mechanisms for water management.

Water resource and climate enthusiasts would find Little Hyatt Dam an intriguing structure to study due to its unique design and location. Situated in a remote area with no nearby towns, the dam feeds water into the Copco Reservoir in California, providing essential water resources for the region. While the dam serves primarily for recreation, its condition and risk assessments highlight the importance of regular maintenance and monitoring to ensure the safety and functionality of this vital water infrastructure.