Mule Creek No. 1 is a privately owned earth dam located in Niobrara, Wyoming, along the East Mule Creek. Built in 1962, this dam serves multiple purposes including fire protection, stock watering, and small fish pond management. With a structural height of 30 feet and a length of 770 feet, Mule Creek No. 1 has a storage capacity of 415 acre-feet and a surface area of 35 acres.

Despite its low hazard potential, a poor condition assessment in 2017 raises concerns about the dam's safety and integrity. The dam features an uncontrolled spillway with a width of 165 feet and a slide gate outlet. Regular inspections are mandated, with the last inspection conducted in April 2017. The risk assessment for Mule Creek No. 1 is rated as moderate, highlighting the need for ongoing risk management measures to ensure the safety of downstream communities and ecosystems.

Located in Congressional District 00 of Wyoming, Mule Creek No. 1 is regulated and permitted by the Wyoming State Engineer's Office. With its strategic location and vital functions, this dam plays a crucial role in water resource management and climate resilience in the region. As water resource and climate enthusiasts, understanding the importance of maintaining and enhancing the safety of structures like Mule Creek No. 1 is essential for sustainable water management practices in the face of changing climate conditions.