Smiley Reservoir, located in Carbon County, Wyoming, is a privately owned Earth dam that was completed in 2000 for the primary purpose of water supply. The reservoir has a capacity of 132 acre-feet of water and covers an area of 8.9 acres. It is situated along the North Fork Cherokee Creek and is regulated by the Wyoming State Engineer's Office.

Despite its low hazard potential, the dam's condition assessment is rated as poor, indicating a need for maintenance and repairs. The last inspection in September 2020 revealed the dam's structural height to be 43 feet with a hydraulic height of 40 feet. The reservoir's spillway type is uncontrolled with a width of 50 feet, and it has uncontrolled outlet gates.

Climate and water resource enthusiasts may find Smiley Reservoir intriguing due to its location in a scenic area and its importance in supplying water for various purposes. However, concerns about the dam's poor condition and the need for regular inspections and maintenance to ensure its safety and functionality highlight the importance of proper management of water resources and infrastructure in the face of changing climate conditions.