When was the first US transcontinental railroad completed?
Transcontinental railroad
A series of transcontinental railroads built over the last third of the 19th century created a nationwide transportation network that united the country by rail. The first of these, the "Pacific Railroad", was built by the Central Pacific Railroad and Union Pacific Railroad to link the San Francisco Bay at Alameda, California, with the nation's existing eastern railroad network at Council Bluffs, Iowa/Omaha, Nebraska, thereby creating the world's first transcontinental railroad when it opened in 1869. Its construction was made possible by the US government under Pacific Railroad Acts of 1862, 1864, and 1867.
American frontier
Six transcontinental railroads were built in the Gilded Age (plus two in Canada); they opened up the West to farmers and ranchers. From north to south they were the Northern Pacific, Milwaukee Road, and Great Northern along the Canada–US border; the Union Pacific/Central Pacific in the middle, and to the south the Santa Fe, and the Southern Pacific. All but the Great Northern of James J. Hill relied on land grants. The financial stories were often complex. For example, the Northern Pacific received its major land grant in 1864. Financier Jay Cooke (1821–1905) was in charge until 1873, when he went bankrupt. Federal courts, however, kept bankrupt railroads in operation. In 1881 Henry Villard (1835–1900) took over and finally completed the line to Seattle. But the line went bankrupt in the Panic of 1893 and Hill took it over. He then merged several lines with financing from J.P. Morgan, but President Theodore Roosevelt broke them up in 1904.