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| Big Thunder Mountain Railroad Grand opening: September 2, 1979 Designers: WED Enterprises Manufacturer: WED Enterprises Vehicles: 7 Cars per train: 5 Guests per train: 30 Train names: U.B. Bold U.R. Daring U.R. Courageous I.M. Brave I.B. Hearty I.M. Fearless I.M. Loco Length: 2671 ft (814 m) Height: 50 ft (15 m) Highest rock: 104 ft (32 m) Top speed: 28 mph (45 km/h) Ride duration: 3:15 Height requirement: 40 in (1.02 m) Minimum Train Dispatch Interval: 42.5 seconds Ride system: PLC Controlled Roller Coaster Category: big mountain railroad thunder
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