The Dalles Lock and Dam, also known as Lake Celilo, is a Federal-owned structure located on the Columbia River in Oregon. Completed in 1957, this gravity dam serves primarily for navigation purposes and also provides hydroelectric power, irrigation, and recreation opportunities. With a height of 116 feet and a length of 8735 feet, the dam has a storage capacity of 330,000 acre-feet and a maximum discharge of 2,290,000 cubic feet per second.

Despite being categorized as having a high hazard potential, the risk assessment conducted by the US Army Corps of Engineers (USACE) in 2018 deemed the risk associated with the dam to be low. USACE regularly conducts inspections, monitors dam performance, and collaborates with local emergency managers to ensure the safety and reliability of the structure. The Emergency Action Plan (EAP) for The Dalles Lock and Dam outlines procedures to be followed during emergencies, with updates based on risk assessment results and inundation maps to further enhance risk management measures.

USACE remains confident in the integrity of its dams, emphasizing their role in reducing flood risks while acknowledging the potential for flooding during extreme weather events. By prioritizing investment in aging infrastructure and increasing community awareness of flood risks, USACE aims to ensure the continued benefits and safety of dams like The Dalles Lock and Dam for the region.