Henningson, also known as Crater Or Old Emery, is a private dam located in Moore, Utah, along Reservoir Creek. Built in 1951 by the USDA NRCS, this earth dam stands at a height of 29 feet and has a hydraulic height of 25 feet. With a storage capacity of 590 acre-feet, it primarily serves the purpose of irrigation on a drainage area of 0.9 square miles.

The dam's spillway type is classified as uncontrolled, with a spillway width of 9 feet. It features an outlet gate in the form of a slide (sluice gate) and is considered to have significant hazard potential, with a moderate risk assessment rating of 3. While details on the condition assessment and emergency action plan are not available, the dam undergoes inspections every two years to ensure its safety and integrity.

Managed by the Natural Resources Conservation Service, Henningson plays a crucial role in water resource management in the region. Its construction and design by USDA NRCS highlight the importance of sustainable water infrastructure for irrigation purposes. With its strategic location and storage capacity, the dam contributes to the overall water supply and agricultural activities in Sanpete County, Utah.