When and where was the Transcontinental Railroad built?

The Transcontinental Railroad was constructed between 1863 and 1869 in the United States. It connected the eastern U.S. rail network with the Pacific coast, primarily built by the Central Pacific Railroad starting in Sacramento, California, and the Union Pacific Railroad beginning in Omaha, Nebraska. The two lines met at Promontory Summit, Utah, on May 10, 1869, marking a significant achievement in American transportation and expansion.