Lyon Lake Dam, located in Grant County, Washington, was completed in 1971 and serves primarily for recreational purposes. This earth dam with stone core types stands at a hydraulic height of 13 feet and a structural height of 9 feet, creating a reservoir with a storage capacity of 68 acre-feet. The dam is regulated and inspected by the Washington Department of Ecology, ensuring its safety and compliance with state regulations.

Situated on Tr-Crab Creek, Lyon Lake Dam poses a low hazard potential and has not been rated for its condition. Despite not having an Emergency Action Plan (EAP) in place or meeting certain guidelines, the dam continues to provide essential water resource management and recreational opportunities for the surrounding community. With its location within Congressional District 04, Washington, Lyon Lake Dam stands as a testament to responsible water infrastructure development and management in the region.

Overall, Lyon Lake Dam represents a vital piece of water resource infrastructure in Washington, offering both recreational benefits and water management capabilities. While it may not be without its challenges in terms of emergency preparedness and condition assessment, the dam serves as a crucial asset for the local area and underscores the importance of sustainable water resource practices in the face of climate change.