The First Transcontinental Railroad (known originally as the "Pacific Railroad" and later as the "Overland Route") was a railroad line built in the United States of America between 1863 and 1869 by the Central Pacific Railroad of California and the Union Pacific Railroad that connected its statutory Eastern terminus at Council Bluffs, Iowa/Omaha, Nebraska (via Ogden, Utah, and Sacramento, California) with the Pacific Ocean at Oakland, California on the eastern shore of San Francisco Bay opposite San Francisco. By linking with the existing railway network of the Eastern United States, the road thus connected the Atlantic and Pacific coasts of the United States by rail for the first time. The construction and operation of the line was authorized by the Pacific Railroad Acts of 1862 and 1864 during the American Civil War. Congress supported it with 30-year U.S. government bonds and extensive land grants of government-owned land. Completion of the railroad was the culmination of a decades-long movement to build such a line. It was one of the crowning achievements in the crossing of plains and high mountains westward by the Union Pacific and eastward by the Central Pacific. Opened for through traffic on May 10, 1869, with the driving of the "Last Spike" at Promontory Summit, Utah, the road established a mechanized transcontinental transportation network that revolutionized the population and economy of the American West. The Pacific Railroad constituted one of the most significant and ambitious American technological feats of the 19th century following in the footsteps of the building of the Erie Canal in the 1820s and the crossing of the Isthmus of Panama by the Panama Railroad in 1855 and this book is the pictorial story of this amazing feat and the individuals and driving forces behind it.