Question: What hydroelectric dam located on the Little Tennessee River in Swain and Graham counties, North Carolina, United States is home to MINIs on the Dragon is an annual gathering of MINI Coopers in Robbinsville, North Carolina? 
Sentence (from "Fontana Dam"): At 480 ft high, Fontana is the tallest dam in the Eastern United States, and at the time of its construction, it was the fourth tallest dam in the world.
Relevant evidence: No