Building east from california, which railroad bridged ravines and blasted through the sierra nevada's granite ridges?

The Central Pacific Railroad of California.

The Central Pacific Railroad (CPRR) was a rail route between California and Utah which blasted through the sierra Nevada’s granite ridges. It was aimed at completing the western segment of the First Transcontinental Railroad and was built eastwards from the West Coast

answer: born in saint-dié, in the vosges department, france, he studied law, and was called to the bar at paris in 1854,[2] but soon went into politics, contributing to various newspapers, particularly to le temps. he attacked the second french empire with great violence, directing his opposition especially against baron haussmann, prefect of the seine department. a series of his articles in le temps was later republished as the fantastic tales of haussmannlaxupa (1868).[2]

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