Union Pacific #4012

Union Pacific #4012 was a 4-8-8-4 Big Boy, one of the longest and among the largest and most powerful steam locomotives in the world. Despite their great size, the Big Boys could reach speeds in excess of eighty miles per hour. Number 4012 is 132'-10" long and, with a loaded tender, weighs 1,189,500 pounds. In service it carried twenty-eight tons of coal, 24,000 gallons of water, and developed a tractive force of 135,375 pounds. Twenty-five Big Boys were built exclusively for the Union Pacific Railroad prior to and during World War II, hauling long, heavy troop and freight trains over the steep grades of the Wasatch Mountains east of Salt Lake City as the ultimate modern main-line heavy-duty steam locomotives.

Scranton, Pennsylvania · United States