when did construction of the transcontinental railroad begin
First Transcontinental Railroad The Central Pacific broke ground on January 8, 1863. Due to the lack of transportation alternatives from the manufacturing centers on the east coast, virtually all of their tools and machinery including rails, railroad switches, railroad turntables, freight and passenger cars, and steam locomotives were transported first by train to east coast ports. They were then loaded on ships which either sailed around South America's [[Cape Horn], or offloaded the cargo at the Isthmus of Panama, where it was sent across via paddle steamer and the Panama Railroad. The Panama Railroad gauge was 5 ft (1524 mm), which was incompatible with the 4 ft 8 1⁄2 inch (1435mm) gauge used by the CPRR equipment. The latter route was about twice as expensive per pound.[citation needed] Once the machinery and tools reached the San Francisco Bay area, they were put aboard river paddle steamers which transported them up the final 130 miles (210 km) of the Sacramento River to the new state capital in Sacramento. Many of these steam engines, railroad cars, and other machinery were shipped dismantled and had to be reassembled.[citation needed] Wooden timbers for railroad ties, trestles, bridges, firewood, and telegraph poles were harvested in California and transported to the project site.
Central Pacific Railroad Planned by Theodore Judah, the Central Pacific Railroad was authorized by Congress in 1862. It was financed and built through "The Big Four" (who called themselves "The Associates"): Sacramento, California businessmen Leland Stanford, Collis Huntington, Charles Crocker, and Mark Hopkins. Crocker was in charge of construction. Construction crews comprised 12,000 Chinese emigrant workers by 1868, when they constituted eighty percent of the entire work force.[5][6] They laid the first rails in 1863. The "Golden spike", connecting the western railroad to the Union Pacific Railroad at Promontory, Utah, was hammered on May 10, 1869.[7] Coast-to-coast train travel in eight days became possible, replacing months-long sea voyages and lengthy, hazardous travel by wagon trains.
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.