John Cushenbury aimed to hit it big, and looking back, he did. A prospector and miner in 1860, Cushenbury discovered silver in the limestone deposit where Mitsubishi Cement Plant is now situated. Hopefully the next silver baron in California, Cushenbury set up a mining camp at the springs below his deposit. When word got out about the discovery the local desert came alive with dreams of grandeur that prospecting brings. Little did he imagine that someday his strike would result in a mega-million dollar kingdom of cement…