Building the Transcontinental Railroad (1863–1869): The 1,900-Mile Race Across America

Discover how America built the Transcontinental Railroad—1,776 miles of track driven across mountains, deserts, rivers, and open plains in one of the greatest construction races of the 19th century. In this AI-powered historical reconstruction, we rebuild the railroad from Sacramento and Omaha to Promontory Summit, revealing the workers, engineering, logistics, blasting techniques, tunnels, bridges, locomotives, and extraordinary construction methods that connected the American West by rail. Using historical engineering records, construction accounts, company records, surveys, and contemporary documentation, this documentary follows the Central Pacific and Union Pacific as they raced toward each other between 1863 and 1869. See how workers carved Bloomer Cut by hand, blasted a roadbed into the cliffs at Cape Horn, and drove 15 tunnels through more than 6,000 feet of Sierra Nevada granite—sometimes advancing only inches per day. Discover how the Central Pacific sank a shaft into Summit Tunnel to create four working faces, introduced nitroglycerin to accelerate excavation, and even disassembled locomotives and dragged them across a 7,000-foot mountain pass on ox-drawn sleds before the tunnel was finished. Follow thousands of Chinese workers through brutal Sierra winters where more than 40 feet of snow buried construction camps, and see how 37 miles of timber snow sheds were eventually built to protect the railroad from avalanches. On the Union Pacific, follow the rolling “Hell on Wheels” construction camps as Irish immigrants, Civil War veterans, Black workers, Mormons, Italians, Germans, and others pushed the railhead west while an enormous supply chain delivered every rail, tie, bolt, and spike to an ever-moving construction front. Then witness the race reach its extraordinary climax on April 28, 1869, when Central Pacific crews laid 10 miles and 56 feet of track in just 12 hours—using 25,800 ties, 3,520 rails, 55,000 spikes, and 14,080 bolts. Finally, see the two l