Which difficulty had to be overcome in the building of the Transcontinental railroad?

The building of the Transcontinental railroad faced many obstacles over time. One of them was the constant attack of native americans which saw their ways of living threatened. The construction of the railroad did not only destroyed their homes, it also affected their plantations and different resources theid needed to subsist.

As the railroad passed through the Sierra Nevada Mountains, the Central Pacific workers faced harsh conditions. Nine tunnels needed to be blasted thorugh the mountains. In addition, weather conditions were extreme leading to many diseases.

A difficulty that had to be overcome during the building of the Transcontinental railroad was Native raiding on work camps.