Hirsig No. 1 is a privately owned dam located in Hawk Springs, Wyoming, along the North Bear Creek. Built in 1954 for irrigation purposes, this earth dam stands at a height of 28 feet with a hydraulic height of 23 feet. The dam has a storage capacity of 80 acre-feet, with a normal storage level of 47 acre-feet and a surface area of 6 acres.

Despite its low hazard potential, Hirsig No. 1 is rated as having poor condition as of the last inspection in August 2019. The dam features an uncontrolled spillway with a width of 50 feet and one outlet valve. The risk assessment for this structure is moderate, indicating a need for ongoing monitoring and maintenance to ensure its safety and functionality for the surrounding community.

With its historical significance and essential role in supporting local agriculture through irrigation, Hirsig No. 1 serves as a vital water resource in the region. However, the dam's condition assessment highlights the importance of regular inspections and risk management measures to mitigate potential hazards and safeguard this valuable infrastructure for future generations.