Barlow No. 1 is a private irrigation dam located in Campbell, Wyoming, along the Antelope Draw river. Built in 1956, this earth dam stands at 24 feet high and spans 727 feet in length, with a storage capacity of 80 acre-feet. The primary purpose of Barlow No. 1 is irrigation, with additional benefits for fire protection, stock watering, and small fish ponds.

Despite its relatively low hazard potential and fair condition assessment, Barlow No. 1 is regulated and inspected by the State of Wyoming, with enforcement and permitting responsibilities falling under the State Engineer's Office. The dam features an uncontrolled spillway with a width of 78 feet and has no outlet gates. The last inspection in June 2018 rated the dam's risk as moderate, prompting a five-year inspection frequency to ensure its continued safe operation.

Overall, Barlow No. 1 serves as a vital water resource for the surrounding area, showcasing the importance of proper maintenance and regulatory oversight for irrigation infrastructure in Wyoming. With its historical significance and ongoing role in water management, this dam represents a key component of the regional water supply system.