Welcome Lake Dam, located in Redmond, Washington, is a privately owned structure with a primary purpose of recreation. Completed in 1959, this earth dam stands at a hydraulic height of 24 feet and a structural height of 18 feet, with a length of 165 feet. The dam has a normal storage capacity of 130 acre-feet and a maximum discharge rate of 1700 cubic feet per second, making it a crucial asset for managing water resources in the area.

Managed by the Washington Department of Ecology, Welcome Lake Dam is state-regulated and regularly inspected to ensure its structural integrity. Despite being classified as having a high hazard potential, the dam is currently assessed to be in fair condition. In case of emergencies, the dam has an Emergency Action Plan (EAP) in place, last revised in March 2019. With its picturesque location on Colin Creek and its importance for recreation, Welcome Lake Dam serves as a vital water resource for the community while also posing potential risks that require careful monitoring and management.

Overall, Welcome Lake Dam is a significant water infrastructure in King County, Washington, serving both recreational and water management purposes. Its historical significance, coupled with its role in controlling water flow and storage, highlights the importance of regular inspections and risk assessments to ensure the safety of nearby residents and stakeholders. As a key feature in the region's water resource management, Welcome Lake Dam stands as a testament to the balance between human enjoyment and environmental stewardship in the face of changing climate patterns.