What materials were used to build the transcontinental railroad?

In order to build the Transcontinental Railroad, the railroad companies needed to gather the right building materials for a project this size. They used timber for railroad beams, iron and steel for tracks and spikes, and black powder and nitroglycerin to blast through rocks and mountains.



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This important design feature was carried forward to later locomotives. Until the 1800s, railways were constructed of cast-iron. Unfortunately, cast-iron was prone to rust and it was brittle, often causing it to fail under stress. In 1820, John Birkinshaw invented a more durable material called wrought-iron.

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Building was financed by both state and US government subsidy bonds as well as by company-issued mortgage bonds. The Western Pacific Railroad Company built 132 miles (212 km) of track from the road's western terminus at Alameda/Oakland to Sacramento, California.

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Transcontinental Railroad Facts
  • It was built to connect the United States' East and West Coasts. ...
  • Approximately 1,800 miles of track. ...
  • The transcontinental railroad cost roughly $100 million. ...
  • Workers came from a wide range of backgrounds and ethnicity. ...
  • President Abraham Lincoln signed the Pacific Railway Act.


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Traditionally, tracks are constructed using flat-bottomed steel rails laid on and spiked or screwed into timber or pre-stressed concrete sleepers (known as ties in North America), with crushed stone ballast placed beneath and around the sleepers.

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The work was tiresome, as the railroad was built entirely by manual laborers who used to shovel 20 pounds of rock over 400 times a day. They had to face dangerous work conditions – accidental explosions, snow and rock avalanches, which killed hundreds of workers, not to mention frigid weather.

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Today, most of the transcontinental railroad line is still in operation by the Union Pacific (yes, the same railroad that built it 150 years ago). The map at left shows sections of the transcon that have been abandoned throughout the years.

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As a stronger material, steel steadily replaced iron for use on railways and allowed considerably longer lengths of rails to be rolled. Today, there are high speed trains that use steel wheels on steel tracks that can travel at ridiculously high speeds.

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When properly maintained by a Midwest railroad contractor, a modern running track has the potential to last for almost 30 years after its construction. It may be difficult to recognize the signs of deterioration in rails because they appear to last an entire lifetime.

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In 1870 it took approximately seven days and cost as little as $65 for a ticket on the transcontinental line from New York to San Francisco; $136 for first class in a Pullman sleeping car; $110 for second class; and $65 for a space on a third- or “emigrant”-class bench.

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The golden spike (also known as The Last Spike) is the ceremonial 17.6-karat gold final spike driven by Leland Stanford to join the rails of the first transcontinental railroad across the United States connecting the Central Pacific Railroad from Sacramento and the Union Pacific Railroad from Omaha on May 10, 1869, at ...

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The transcontinental railroad was built in six years almost entirely by hand. Workers drove spikes into mountains, filled the holes with black powder, and blasted through the rock inch by inch. Handcarts moved the drift from cuts to fills.

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