Baby Gap Ranch Reservoir, located in Prosser, Washington, is a privately owned irrigation reservoir on the Yakima River. Completed in 2015, this earth dam structure stands at a hydraulic height of 13 feet and has a structural height of 11 feet. With a normal storage capacity of 12.7 acre-feet and a maximum storage of 16 acre-feet, this reservoir covers a surface area of 2 acres and serves primarily for irrigation purposes.

Despite being a privately owned facility, Baby Gap Ranch Reservoir is regulated by the Washington Department of Ecology and undergoes regular inspections to ensure its safety and compliance with state regulations. The reservoir has a high hazard potential but is currently assessed to be in satisfactory condition. Emergency action plans are in place, and the last inspection in June 2021 confirmed the reservoir's structural integrity.

Water resource and climate enthusiasts will appreciate the vital role that Baby Gap Ranch Reservoir plays in supporting agricultural irrigation in the region. As part of the Yakima River system, this reservoir contributes to water management and conservation efforts, highlighting the importance of sustainable water resource practices in the face of changing climate conditions. With its modern design and state-regulated operations, Baby Gap Ranch Reservoir stands as a symbol of responsible water management and environmental stewardship in Washington State.