Smalley, located in Valley, Idaho, is a privately owned dam that was completed in 1952 for the primary purpose of irrigation. This earth dam, with a height of 35.1 feet and a hydraulic height of 31.1 feet, impounds water from Glen Cove Creek and Beaver Creek, providing a storage capacity of 113 acre-feet. The dam has a surface area of 13 acres and a drainage area of 1.1 square miles, with a maximum discharge capacity of 94 cubic feet per second.

Despite being classified as having a low hazard potential and fair condition assessment, Smalley is subject to state regulation, permitting, inspection, and enforcement by the Idaho Department of Water Resources. The dam features an uncontrolled spillway with a width of 10 feet and has not undergone any significant modifications since its completion. The last inspection of Smalley was conducted in May 2017, with a scheduled inspection frequency of every 5 years. Overall, Smalley presents a moderate risk level (3) and may require risk management measures to ensure its continued safety and functionality for irrigation purposes in the region.