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In the beginning, surface mining was used, but the mine has been mined with the sublevel caving mining method since the 1960s. In 1985 reserves for the Kiruna Mine were 1,800 million tonnes grading 60–65% iron and 0.2% phosphorus. [26] [1] As of 2018 the Kiruna Mine had Proven and Probable Reserves of 683 million tonnes grading 43.8% iron. [27]
The U.S. state of Oklahoma has 77 counties. It is ranked 20th in size and 17th in the number of counties, between Mississippi with 82 counties and Arkansas with 75 counties. [1] Oklahoma originally had seven counties (Logan, Cleveland, Oklahoma, Canadian, Kingfisher, Payne, and Beaver) when it was first organized as the Oklahoma Territory ...
This is a list of Superfund sites in Oklahoma designated under the Comprehensive Environmental Response, Compensation, and Liability Act (CERCLA) environmental law. The CERCLA federal law of 1980 authorized the United States Environmental Protection Agency (EPA) to create a list of polluted locations requiring a long-term response to clean up hazardous material contaminations. [1]
Picher, Oklahoma was incorporated in 1918 after ore was discovered. All that remains in the ghost town are empty buildings and piles of toxic waste. Picher, Oklahoma was incorporated in 1918 after ...
On March 6, 2020, the OMB delineated six combined statistical areas, five metropolitan statistical areas, and 17 micropolitan statistical areas in Oklahoma. [1] As of 2023, the largest of these is the Oklahoma City-Shawnee, OK CSA , comprising the area around Oklahoma City , Oklahoma's capital and largest city.
The Swedish mining company LKAB (Luossavaara-Kiirunavaara Aktiebolag) has been mining the mountain since the beginning of the 20th century. [2] [3] [4] The mining area around Kiruna and Malmberget, together with the iron port and steelworks at Luleå, made Norrbotten County one of the first, and most prominent, regions of heavy industry in ...
Some Oklahoma counties saw a wider margin than others, but Trump did win the majority of votes in all of Oklahoma's 77 counties, which makes us an "all-red state."
The disaster occurred in the early hours of 22 September 1934, when a huge explosion took place about 1.3 miles (2.1km) from a shaft. Six miners managed to escape but by the evening of the next ...