Chattahoochee Whitewater Park claims the title of longest urban whitewater course in the world, running right through downtown Columbus, Georgia and Phenix City, Alabama on the opposite bank. The course came together in 2013 when the old Eagle & Phenix and City Mills dams were taken out of service, opening up a stretch stacked with more than five Class IV-plus rapids plus ten smaller ones. Releases can push flow as high as 13,000 cfs—over ten times the Ocoee's typical level—so this is a serious-volume wave, not a beginner playground. Flows are scheduled rather than left to natural runoff, so outfitters run trips and the course stays surfable essentially year-round.