Chalfa Dam, also known as Wenner Lakes Dam No. 3, is a state-owned earth dam located in Carlton, Okanogan County, Washington. Built in 1940, this dam serves multiple purposes including irrigation and recreation. With a hydraulic height of 17 feet and a structural height of 12 feet, Chalfa Dam has a normal storage capacity of 50 acre-feet and a maximum storage capacity of 80 acre-feet. The dam is situated on Tr-Benson Creek and covers a surface area of 9 acres, with a drainage area of 6.6 square miles.

Managed by the Washington Department of Ecology, Chalfa Dam is inspected every 5 years and has been deemed to have a fair condition assessment. Despite its high hazard potential, the dam has not undergone any significant modifications in recent years. The dam's emergency action plan status and risk management measures are currently unknown, highlighting the need for continued monitoring and maintenance to ensure the safety and efficiency of this vital water resource infrastructure in Washington state. For water resource and climate enthusiasts, Chalfa Dam represents a fascinating example of how infrastructure can support both recreational activities and agricultural needs while also posing potential risks that must be carefully managed.