Sportsman Lake Dam, located in San Juan, Washington, is a privately owned structure primarily used for irrigation purposes. Completed in 1960, this earth dam stands at a hydraulic height of 7 feet and a structural height of 5 feet, with a length of 63 feet. It has a normal storage capacity of 272 acre-feet and a maximum storage capacity of 500 acre-feet, serving as a vital resource for the surrounding area.

Managed by the Washington Department of Ecology, Sportsman Lake Dam is regulated, inspected, and enforced by the state to ensure its safety and compliance with established standards. Despite being classified as low hazard potential and not yet rated for its condition assessment, the dam plays a crucial role in providing water for irrigation and recreational activities in the region. With its location on Tr-San Juan Channel, the dam is positioned to support the water needs of the community while maintaining environmental sustainability.

As a key part of the local water infrastructure, Sportsman Lake Dam represents a significant contribution to water resource management in the area. While its condition assessment is pending, the dam's operational history since 1960 underscores its importance in supporting agricultural activities and recreational opportunities. With ongoing state oversight and inspection, the dam continues to play a vital role in ensuring water security and access for residents in San Juan, Washington.