in 1872 Mining enabled westward expansion. In 1890 the Sherman Silver Act was passed so suppliment America's farmers might earn more for their crops so the silver act where the government to purchase nearly twice as much silver as before, but also added substantially to the amount of 2-4 million dollars to subsidize the farm economy. That plan backfired, as people turned in their silver Treasury notes for gold dollars, which depleated the gold reserve. This gold rush led to the crash of 1893. this led to western ghost towns.
The price of silver dropped minimg companies cut wages. Many miners woved to other towns, towns started dying. The mining leases mineral rights for 1872 rates.