Elmer Dam, located in La Center, Washington, is a privately owned structure primarily used for irrigation purposes. Completed in 1958, this earth dam stands at a height of 16 feet and spans a length of 760 feet. It holds a maximum storage capacity of 38 acre-feet and covers a surface area of 18 acres, serving the surrounding area with water from Tr-Mason Creek.

Managed by the Washington Department of Ecology, Elmer Dam is regulated, inspected, and enforced to ensure its safety and functionality. Despite being classified as a high hazard potential structure, the dam's condition assessment in August 2020 deemed it to be satisfactory. With a hazard potential classification of high, the dam's emergency action plan and risk management measures play a crucial role in ensuring the safety of the surrounding community in the event of a potential breach.

As a key component of the water resource infrastructure in Clark County, Washington, Elmer Dam remains a vital resource for irrigation and water management in the region. With its strategic location and efficient design, the dam continues to play a critical role in supporting agricultural activities and ensuring water availability for the local community.