Rainbow Springs Dam, located in Snohomish, Washington, stands as a testament to human ingenuity and the harmonious intersection of water resource management and recreational activities. Built in 1969, this private-owned earth dam on the Tr-South Fork Stillaguamish River boasts a structural height of 12 feet and a hydraulic height of 14 feet, providing a maximum storage capacity of 63 acre-feet for the surrounding area. Despite its impressive stature, the dam's condition assessment reveals a poor rating, with a high hazard potential, highlighting the importance of regular inspections and maintenance to ensure its continued safety and functionality.

The primary purpose of Rainbow Springs Dam is recreation, offering visitors a tranquil retreat in the midst of nature's beauty. With a normal storage capacity of 43 acre-feet and a surface area of 43 acres, the dam provides a serene setting for fishing, boating, and other water-based activities. However, the dam's last inspection in September 2018 raised concerns about its structural integrity, underscoring the need for ongoing monitoring and potential rehabilitation efforts to address any safety risks associated with its aging infrastructure.

Managed by the Washington Department of Ecology, Rainbow Springs Dam falls under state jurisdiction and regulation, with permitting, inspection, and enforcement processes in place to ensure compliance with safety standards and environmental protection measures. As climate change continues to impact water resources and infrastructure resilience, the importance of maintaining and updating dams like Rainbow Springs becomes increasingly vital in safeguarding communities and ecosystems against potential hazards and ensuring sustainable water management for future generations.