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2. Intrepid Potash - Wikipedia

   en.wikipedia.org/wiki/Intrepid_Potash

   Potash evaporation ponds at the Intrepid mine near Moab, Utah, 2012. Colorado River is at right of frame. Intrepid Potash, Inc. (NYSE: IPI), based in Denver, Colorado, is a fertilizer manufacturer. The company is the largest producer of potassium chloride, also known as muriate of potash, in the United States. [1]

3. Phosphate mining in the United States - Wikipedia

   en.wikipedia.org/wiki/Phosphate_mining_in_the...

   The phosphate mining industry employed 2,200 people. The value of phosphate rock mined was US$2.2 billion. As of 2015, there are 10 active phosphate mines in four states: Florida, North Carolina, Idaho, and Utah. The eastern phosphate deposits are mined from open pits. The western deposits are mined from both surface and underground mines.

4. Underground hard-rock mining - Wikipedia

   en.wikipedia.org/wiki/Underground_hard-rock_mining

   There are two principal phases of underground mining: development mining and production mining. Development mining is composed of excavation almost entirely in (non-valuable) waste rock in order to gain access to the orebody. There are six steps in development mining: remove previously blasted material (muck out round), scaling (removing any unstable slabs of rock hanging from the roof and ...

5. Mining in the United States - Wikipedia

   en.wikipedia.org/wiki/Mining_in_the_United_States

   The Monongah Mining Disaster was the worst mining accident of American history; 362 workers were killed in an underground explosion on December 6, 1907, in Monongah, West Virginia. The U.S. Bureau of Mines was created in 1910 to investigate accidents, advise industry, conduct production and safety research, and teach courses in accident ...

6. Kennecott Utah Copper - Wikipedia

   en.wikipedia.org/wiki/Kennecott_Utah_Copper

   As the mine in Utah expanded, it subsumed the land on which the City of Bingham Canyon was built, and the city was disincorporated in 1971. [3] [4] In 1981, after a worldwide fall in copper prices, Standard Oil of Ohio (SOHIO) acquired Kennecott. Production was interrupted from 1985 to 1987.

7. Category:Underground mines in the United States - Wikipedia

   en.wikipedia.org/wiki/Category:Underground_mines...

   Pages in category "Underground mines in the United States" The following 76 pages are in this category, out of 76 total. This list may not reflect recent changes .