The overall size of a UP Big Boy is truly impressive to behold. This view of the 4-8-8-4 leading a special west of Hanna helps show its overall size. Including the tender, the unit is 132 feet long. The Big Boy and tender combine weight right around 1.2 million pounds (600 tons). The tender holds close to 25,000 gallons of water and consumes as much as 12,000 gallons of water per hour.
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