Jean Lake Dam, also known as Twin Lakes & Crabtree Orchards Reservoir, is a private dam located in King County, Washington. Built in 1963, this earth dam stands at a hydraulic height of 15 feet and a structural height of 12 feet, providing recreational opportunities for visitors in the area. With a normal storage capacity of 100 acre-feet and a drainage area of 1.33 square miles, Jean Lake Dam plays a vital role in water resource management in the region.

Managed by the Washington Department of Ecology, Jean Lake Dam has a low hazard potential and is currently rated as "Not Rated" in terms of condition assessment. While the dam has not been inspected recently, it is under state regulation, inspection, and enforcement to ensure its safety and compliance with standards. The dam's purpose primarily revolves around recreation, offering a serene and picturesque setting for outdoor enthusiasts to enjoy.

Situated along Joes Creek and surrounded by the natural beauty of the Pacific Northwest, Jean Lake Dam serves as a tranquil retreat for locals and tourists alike. With its stone core and soil foundation, the dam stands as a testament to responsible water resource management and environmental stewardship. As climate change continues to impact water systems, Jean Lake Dam remains a key structure in maintaining water supply and supporting the local ecosystem in King County.