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Transcontinental Railroad summary: The First Transcontinental Railroad was built crossing the western half of America and it was pieced together between 1863 and 1869. It was 1,776 miles long and served for the Atlantic and Pacific coasts of the United States to be connected by rail for the first time in history.
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Geographically it formed the U.S by connecting it's separate ends. Economically it helped the prosper of trades and transportation. 

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