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The Blackhawk Formation is a geological formation in east-central Utah, USA. It was named for the former town of Blackhawk on the east side of the Wastach Plateau, Carbon County. [ 1 ] The formation is composed of mostly light-brown, light-gray and brownish-gray, thin- to medium-bedded, fine- to medium-grained quartzose sandstone that is ...
Patriot Coal Corporation was a coal-mining company based in St. Louis, Missouri in the United States. The company was a spin-off of most of the Eastern U.S. operations of Peabody Energy. Patriot was the second largest coal miner east of the Mississippi River. The company's operations were made up of 16 mining complexes.
The Battle of Wisconsin Heights was the penultimate engagement of the 1832 Black Hawk War, fought between the United States state militia and allies, and the Sauk and Fox tribes, led by Black Hawk. The battle took place in what is now Dane County , near present-day Sauk City, Wisconsin .
Mountaintop removal mining (MTR), also known as mountaintop mining (MTM), is a form of surface mining at the summit or summit ridge of a mountain. Coal seams are extracted from a mountain by removing the land, or overburden, above the seams. This process is considered to be safer compared to underground mining because the coal seams are ...
Straddling the border of Boone County and Lincoln County in the Appalachian Mountains, the Hobet 21 mine was one of the largest mountaintop-removal coal mining operations in West Virginia. Originally owned by Fil Nutter, the mine used both underground mining and strip mining techniques, and later even more intensive surface mining using a ...
M977 HEMTT with M136 Volcano mine dispensing system UH-60 Blackhawk with M136 Volcano mine dispensing system. The M136 Volcano Vehicle-Launched Scatterable Mine System is an automated mine delivery system developed by the United States Army in the 1980s.
The Central City/Black Hawk Historic District (formerly just the Central City Historic District) is a National Historic Landmark District that encompasses the developed areas of Central City and Black Hawk, Colorado, United States. They are adjacent former gold mining camps in the Front Range of the Rocky Mountains in Gilpin County, Colorado.
Consol Energy's flagship operation is the Pennsylvania Mining Complex, which includes three large underground mines capable of producing approximately 28.5 million tons of coal per year. Consol's coal division [ 4 ] received the U.S. Department of the Interior's Office of Surface Mining National Award for Excellence in Surface Mining for the ...