Lewis Dam, located in Kitsap, Washington, is a privately owned structure that serves primarily for recreational purposes. Completed in 1973, this earth dam stands at a hydraulic height of 15 feet with a structural height of 12 feet and a length of 120 feet. The dam has a storage capacity of 330 acre-feet, with a normal storage level of 300 acre-feet and a surface area of 300 acres. It is situated on Tr-Big Beef Creek and falls under the regulatory jurisdiction of the Washington Department of Ecology.

With a low hazard potential and a condition assessment that is not rated, Lewis Dam is a relatively stable structure that has not undergone recent modifications. It does not have an Emergency Action Plan (EAP) prepared, and its last inspection date and inspection frequency are unknown. The dam is not owned or funded by any federal agency and has no associated locks, spillways, or outlet gates. While it does not currently pose a significant risk, ongoing monitoring and maintenance may be necessary to ensure its continued safety and functionality for recreational purposes in the future.