who came up with the idea to build the transcontinental railroad
First Transcontinental Railroad Building a railroad line that connected the United States coast-to-coast was advocated in 1832 when Dr. Hartwell Carver published an article in the New York Courier & Enquirer advocating building a transcontinental railroad from Lake Michigan to Oregon. In 1847 he submitted to the U.S. Congress a "Proposal for a Charter to Build a Railroad from Lake Michigan to the Pacific Ocean", seeking a congressional charter to support his idea.[20][21]
First Transcontinental Railroad Several years after the end of the Civil War, the competing railroads coming from Missouri finally realized their initial strategic advantage and a building boom ensued. In July 1869, the H&SJ finished the Hannibal Bridge in Kansas City which was the first bridge to cross the Missouri River. This in turn connected to Kansas Pacific trains going from Kansas City to Denver, which in turn had built the Denver Pacific Railway connecting to the Union Pacific. In August 1870, the Kansas Pacific drove the last spike connecting to the Denver Pacific line at Strasburg, Colorado and the first true Atlantic to Pacific United States railroad was completed.