Dams disrupt the physical, chemical and biological connectivity of rivers and watersheds. The magnitude of this disruption, and its impact on riverine ecosystems, generally declines with distance downstream of a dam. Flaming Gorge Dam, which blocks the Green River in Colorado and Utah, provides a unique setting for evaluating downstream changes in aquatic and riparian ecosystems below large, multipurpose reservoirs. In June 2006, the Ecogeomorphology course studied the Green from the tailwaters below Flaming Gorge Dam through the Gates of Lodore, past the confluence with the unregulated Yampa River, ending at Split Mountain in Dinosaur National Monument.