Utter Dam, located in San Juan, Washington, is a privately owned earth dam primarily used for recreation purposes. Completed in 1971, this dam stands at a structural height of 13 feet, with a hydraulic height of 16 feet. It has a storage capacity of 98 acre-feet, with a normal storage level of 73 acre-feet, covering a surface area of 73 acres.

Situated on the Tr-Rosario Strait, Utter Dam is regulated by the Washington Department of Ecology and undergoes regular inspections to ensure its safety. With a low hazard potential, this dam poses minimal risk to the surrounding area. While the dam has not been rated for its condition, it remains in operation for recreational activities, offering a peaceful retreat for water resource and climate enthusiasts in the region.

Congressman Rick Larsen (D) represents the area in which Utter Dam is located, ensuring federal oversight of this structure. While there are no associated structures with the dam, its presence adds to the beauty and recreational opportunities in the scenic landscape of San Juan, Washington. For those interested in water resources and climate, Utter Dam serves as a unique and valuable resource in the region.