Poison Creek No. 1 is a private irrigation dam located in Wyoming, specifically in the city of Young Reservoir. Built in 1999, this Earth dam stands at a height of 30 feet and has a storage capacity of 33 acre-feet, serving multiple purposes including fire protection, stock, fish and wildlife habitat, irrigation, and recreation. The dam spans 340 feet in length and covers a surface area of 2.4 acres, with a drainage area of 1.47 acres.

Despite its low hazard potential, Poison Creek No. 1 is in poor condition according to its last assessment in August 2021. The dam has an uncontrolled spillway width of 40 feet and a maximum discharge rate of 1195 cubic feet per second. The dam is inspected every 5 years, with the last inspection taking place in August 2021. While the risk assessment is moderate, there are no specific risk management measures or emergency action plans currently in place for this structure.

Water resource and climate enthusiasts interested in the management and sustainability of dams will find Poison Creek No. 1 an intriguing case study. With its diverse range of purposes and its location in the beautiful Johnson County, Wyoming, this dam serves as a vital resource for the surrounding community. However, the poor condition of the dam and the lack of risk management measures highlight the importance of regular maintenance and preparedness in ensuring the safety and longevity of such crucial water infrastructure.