Wanapum is a gravity dam located on the Columbia River in Washington, with a primary purpose of hydroelectric power generation. Built in 1965 by Harza Engineering Corporation, this concrete and rockfill dam stands at a height of 93 feet and has a hydraulic height of 80 feet, providing storage for up to 796,000 acre-feet of water. The dam's spillway, with a controlled design and a width of 832 feet, helps manage the maximum discharge of 1,400,000 cubic feet per second.

With a hazard potential rated as high and a very high risk assessment score of 1, Wanapum is closely monitored by the Federal Energy Regulatory Commission for inspections and regulatory compliance. While the dam's condition assessment is listed as not available, emergency action plans are in place to address any potential risks associated with the dam. Wanapum also offers recreational opportunities and plays a role in flood risk reduction, showcasing its multifaceted importance in water resource management and climate adaptation efforts in the region.