how much did it cost to cuild THE CALIFORNIA AQUEDUCT? [detailed please, and leave your sources]?

Answer 1

I don't remember, but it was twice as much as then Governor Pat Brown told us it would be. He was more than slightly prejudiced toward helping Southern California.

There were newspaper articles about the cost overruns when it was being built. Perhaps you could research this at a library, or through the California Department of Water Resources