Deception is a privately owned Earth dam located in Johnson, Wyoming, with a primary purpose of irrigation. Built in 2007 by designer H. Lowham, the dam stands at a height of 33 feet and has a hydraulic height of 28 feet. With a storage capacity of 94 acre-feet, it serves multiple purposes including fire protection, stock watering, and small fish pond management.

The dam spans 504 feet in length and covers a surface area of 5.61 acres, with a maximum discharge capacity of 975 cubic feet per second. Despite being classified as having a low hazard potential and fair condition assessment, Deception underwent its last inspection in April 2018, with a scheduled inspection frequency of every 5 years. The dam features an uncontrolled spillway with a width of 65 feet, and is equipped with a single valve as its outlet gate.

Deception plays a crucial role in water resource management in the area, regulating water flow in the Iron Draw stream for irrigation purposes. As climate change continues to impact water availability and usage patterns, monitoring and maintaining the infrastructure of dams like Deception is essential to ensure sustainable water resource management in the region.