USA HISTORY

Detailed explanation-1: -By one estimate, the project cost roughly $60 million, about $1.2 billion in today’s money, though other sources put the amount even higher. While the railroad’s construction was a mammoth undertaking, its effects on the country were equally profound.

Detailed explanation-2: -Railroads became a major industry, stimulating other heavy industries such as iron and steel production. These advances in travel and transport helped drive settlement in the western regions of North America and were integral to the nation’s industrialization.

Detailed explanation-3: -In 1862, Congress passed the Pacific Railway Act, which authorized the construction of a transcontinental railroad. The first such railroad was completed on May 10, 1869. By 1900, four additional transcontinental railroads connected the eastern states with the Pacific Coast.