Casad Dam, located in Belfair, Washington, is a vital structure owned by the local government and regulated by the Washington Department of Ecology. Completed in 1956, this arch-type dam on the Union River serves the primary purpose of supplying water to the region, with a storage capacity of 4,500 acre-feet and a maximum discharge of 520 cubic feet per second. Standing at a hydraulic height of 190 feet and a structural height of 130 feet, the dam spans 416 feet in length and covers a surface area of 40 acres.

Despite being classified as having a high hazard potential, Casad Dam is currently assessed to be in fair condition as of its last inspection in August 2018. The dam's Emergency Action Plan (EAP) status is unknown, and there is no record of the existence of inundation maps or risk assessments. With a history of state regulation and inspection, Casad Dam remains a critical water resource infrastructure in Kitsap County, Washington, ensuring a reliable water supply for the surrounding communities while being subject to ongoing monitoring and maintenance to ensure public safety and environmental protection.