railroad?
Yes they did around 400 slaves built the capitol.
(Railroad)
The Union Pacific Railroad and The Central Pacific Railroad Companies were formed to build the railroad. Many of the CPR workers working east from California were Chinese-Americans and many of the UPR workers building west from Nebraska were Irish immigrants.
Why of course to make a living off the backs of the slaves. They brought slaves to America to work their fields and land pretty much they built this country off the backs of the slaves.
built a state highway system to connect cities
The statue of Nebraska was built by Bertrum G. Goodhue
The transcontinental railroad was built by the Union Pacific Railroad going west from Omaha, Nebraska. They built their part of the railroad to Promontory, Utah. The Central Pacific Railroad built the other part of the transcontinental railroad starting in Sacramento, California and built east meeting the Union Pacific Railroad.
This could be answered at two levels: the US government through the Pacific Railroads Act (1862) founded the Union Pacific Railroad to build the line from Omaha Nebraska to the California/Nevada line. The workers who actually built the line were largely immigrants (Chinese).
Angel island was built off of California. Ellis Island was built in New York City, just outside of Manhattan. Both of these places were the first place immigrants saw when they arrived.
Half of it was started in California and the other half was started in Nebraska. Both parts of the railroad were connected in Promontory Point.
Chinese immigrants
Yes and no. The main residence, as well as foundations of the house, were built largely by enslaved and free African-American laborers, as well as employed European immigrants, many of whom had not yet got their citizenship.
Yes Hindu slaves built it for the Muslim leader of India
If you want to be technical about it, yes. The first humans to permanently live in the USA were the Native Aboriginals, who were descendants of Siberians nomads. Beyond that, the USA was later colonized by Britain (as well as France and Spain to a lesser extent), meaning that immigrants from those countries (and imported slaves from Africa) began to permanently inhabit the USA. Today, the USA welcomes thousands of immigrants from around the world. Thus, the USA was "built" by immigrants from all over the place.
Spain built the California missions.
Slaves
slaves