Lynch Dam, also known as Finley Dam, is a local government-owned structure located in Portland, North Dakota. Constructed in 1934 by Ducks Unlimited, this earth dam on the Middle Branch Goose River serves primarily for recreational purposes, offering a storage capacity of 90.65 acre-feet. With a structural height of 22 feet and a spillway width of 50 feet, Lynch Dam is regulated by the NDSWC and undergoes regular state inspections, enforcement, and permitting processes to ensure its safety and compliance.

Despite its low hazard potential, Lynch Dam is considered to have a moderate risk level, with a rating of 3 indicating the need for ongoing risk management measures. While the dam's condition is currently not rated, emergency action plans have not been prepared or updated recently. The dam features a vertical lift outlet gate and has an uncontrolled spillway type. Although there have been no reported modifications since its completion, Lynch Dam continues to be an important water resource in the area, providing both recreational opportunities and essential storage capacity.

Overall, Lynch Dam stands as a testament to the enduring legacy of water resource management in North Dakota. With a rich history dating back to the 1930s and a dedication to maintaining its functionality and safety, this earth dam plays a crucial role in both local water management and climate resilience efforts. As enthusiasts for water resources and climate issues, we recognize the importance of structures like Lynch Dam in safeguarding our communities and natural environments for generations to come.