Crain is a privately owned irrigation dam located in Johnson, Wyoming, along the Mid Fork of Trabing Dry Creek. Built in 1958, this Earth dam stands at a height of 20 feet and has a storage capacity of 400 acre-feet, with a normal storage level of 220 acre-feet. The dam covers a surface area of 36 acres and has a drainage area of 2.3 square miles, with a maximum discharge capacity of 655 cubic feet per second.

With a low hazard potential and fair condition assessment, Crain poses a moderate risk level of 3. The dam features an uncontrolled spillway with a width of 105 feet and utilizes a slide (sluice gate) outlet gate for water release. While the dam is state-regulated and undergoes regular inspections, its last inspection in July 2021 indicated a need for continued monitoring and maintenance to ensure its safety and functionality in the face of changing climate conditions. Enthusiasts of water resources and climate change will find Crain to be an intriguing structure that highlights the importance of sustainable dam management in the context of evolving environmental challenges.