Geoffrey Griffin is a private dam located in Fillmore, Minnesota, along the Root River. Built in 2007 by GGG ENG, this buttress dam stands at a height of 36 feet and has a storage capacity of 108 acre-feet, primarily used for fire protection, stock, or small fish pond purposes. Despite being privately owned, Geoffrey Griffin falls under the jurisdiction of the state of Minnesota and is not regulated or inspected by any state agency.

With a low hazard potential and a condition assessment that has not been rated, Geoffrey Griffin poses little risk to its surrounding community. It has not been designated for any emergency action plan (EAP) preparation, and there are no inundation maps available for the area. While the dam has not been modified in recent years and has no outlet gates or locks, it serves its primary purposes effectively and remains in compliance with state regulations.

For water resource and climate enthusiasts, Geoffrey Griffin offers a glimpse into private dam infrastructure in Minnesota. Its modest size and simple design make it a low-risk structure with a specific focus on fire protection and water storage. As part of the St. Paul District under the US Army Corps of Engineers, this dam provides valuable insight into the management of small-scale water resources in rural areas.