Jun 09, 2017 · In the Classic Greece and in the Roman Empire, many mines were exploited for production of iron, lead, copper, gold, and other metals. Many of those old mines are still known, and some have been operated over several centuries or were rediscovered (FernandezLozano et al. 2015). With time, mining have expanded and increasing amounts of fossil ...

Mines have a tendency to fill with water unless a drain is provided. The Wasatch Drain Tunnel (WDT) was constructed during the period of 1912 to 1916 by Wasatch Mines Company to drain water from the mines and improve ore transportation efficiencies from approximately 50 miles of silver, lead, copper, and zinc mines in and around Snowbird and Alta.

Sep 30, 2016 · Scrutiny is heightened for a few of these minerals. A 2010 law requires American companies to attempt to verify that any tin, tungsten, tantalum and gold they use is obtained from mines .