Authorized by Congress during the Civil War, the First Transcontinental Railroad was built by two companies working from opposite directions, the Central Pacific from the west and the Union Pacific from the east, racing to lay the most track.
Background
Construction relied heavily on immigrant labor, including thousands of Chinese workers on the Central Pacific line who cut through the Sierra Nevada mountains under extremely dangerous conditions, and Irish immigrant labor on much of the Union Pacific line.
“Two railroads racing toward each other met, at last, at a single spike driven into Utah soil.”
The Key Events
The two lines finally met at Promontory Summit, Utah, on May 10, 1869, marked by the ceremonial driving of a golden final spike, an event later reenacted for photographs that remain iconic images of the era.
Legacy and Lasting Impact
The completed railroad dramatically cut cross-country travel time and accelerated westward settlement and economic development, while also displacing Indigenous nations from land along the route, a cost historians increasingly emphasize alongside the engineering achievement.
- Thousands of Chinese laborers built much of the Central Pacific's mountain sections.
- The lines met at Promontory Summit, Utah, on May 10, 1869.
- The railroad cut cross-country travel time from months to about a week.
References & Further Reading
- Stephen Ambrose, *Nothing Like It in the World*
- National Park Service, Golden Spike National Historical Park
- Britannica, entry on the First Transcontinental Railroad
- Library of Congress, Chinese Railroad Workers in North America project
