Summit Lake Dam, located in Thurston, Washington, along Kennedy Creek, was completed in 1955 and serves as a private recreational water resource. With a hydraulic height of 7 feet and a structural height of 3 feet, this earth dam spans 90 feet in length and provides a storage capacity of 1570 acre-feet. The dam, constructed with a stone core on a soil foundation, covers a surface area of 130 acres, offering a serene retreat for water and climate enthusiasts.

Despite its low hazard potential, Summit Lake Dam is regulated and inspected by the Washington Department of Ecology to ensure its safety and compliance with state standards. The dam's last inspection took place in May 1998, with a condition assessment currently marked as "Not Rated." While there are no associated structures or outlet gates, the dam's primary purpose remains focused on recreation, attracting visitors seeking to enjoy the tranquil waters and scenic surroundings of Summit Lake.

With its picturesque location and serene atmosphere, Summit Lake Dam stands as a testament to the importance of water resources for recreation and environmental sustainability. As a private entity, the dam continues to offer a peaceful retreat for enthusiasts interested in exploring the intersection of water resources and climate in the beautiful landscape of Thurston, Washington.