On May 10, 1869, the presidents of the Union Pacific and Central Pacific railroads meet in Promontory, Utah and drive a ceremonial “Golden Spike” into a rail line that connected their railroads, providing a link between the eastern and western United States.
One year into the Civil War, a Republican-controlled Congress passed the Pacific Railroad Act (1862), guaranteeing public land grants and loans to the two railroads it chose to build the transcontinental line, the Union Pacific and the Central Pacific. With these in hand, the railroads began work in 1866 from Omaha and Sacramento, forging a northern route across the country. …
For all the adversity they suffered, the Union Pacific and Central Pacific workers were able to finish the railroad–laying nearly 2,000 miles of track–by 1869, ahead of schedule and under budget. Journeys that had taken months by wagon train or weeks by boat now took only days. Their work had an immediate impact: The years following the construction of the railway were years of rapid growth and expansion for the United States, due in large part to the speed and ease of travel that the railroad provided.