Buffalo No.1 Detention Dam, located in Tensleep, Wyoming, is a federal-owned structure managed by the Bureau of Land Management with a primary purpose of water supply. Completed in 2003, this gravity-type dam stands at a structural height of 33 feet and has a hydraulic height of 27 feet. With a NID storage capacity of 372.5 acre-feet and a normal storage of 313 acre-feet, the dam serves the Buffalo Creek Nowood River and covers a surface area of 28.98 acres.

Despite its low hazard potential, Buffalo No.1 Detention Dam has an unsatisfactory condition assessment, last inspected in August 2016. The dam's risk assessment indicates a moderate level of risk, suggesting the need for ongoing monitoring and maintenance to ensure its continued safety and functionality. With a drainage area of 7,900 acres, the dam plays a crucial role in managing water resources in the region, highlighting the importance of maintaining its integrity and addressing any identified issues promptly.

Overall, Buffalo No.1 Detention Dam stands as a vital infrastructure for water supply in the Washakie County of Wyoming. As a federally owned and regulated structure, it underscores the collaborative efforts of various agencies, including the DOI BLM, in ensuring the effective management and operation of water resources. With its strategic location and capacity, the dam remains a key asset in safeguarding against potential flooding and supporting the water needs of the local community.