Alaska Railroad
In 1914, the US Congress appropriated $35 million for construction of the Alaska Railroad system, but work was delayed by the outbreak of World War I. Three years later, the Alaska Railroad purchased the Tanana Valley Railroad, which had suffered from the wartime economic problems. Rail workers built a line extending northwest from Fairbanks, then south to Nenana, where President Warren G. Harding hammered in the ceremonial final spike in 1923. The rail yards of the Tanana Valley Railroad were converted for use by the Alaska Railroad, and Fairbanks became the northern end of the line and its second-largest depot.