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The Rawhide Mine is a coal mine located 10 miles (16.1 km) north of Gillette, Wyoming in the United States in the coal-rich Powder River Basin.The mine is an open pit mine that utilizes a combination of cast blast/dozer push and truck/shovel mining methods to strip an average of 165 feet (50.3m) of overburden off of approximately 105 (32.0m) feet of coal.
The Black Thunder Coal Mine is a surface coal mine in the U.S. state of Wyoming, located in the Powder River Basin which contains one of the largest deposits of coal in the world. In 2022, the mine produced 62,180,000 short tons (56,410,000 t) of coal, [ 1 ] over 25% of Wyoming's total coal production.
Some trestles achieved staggering heights to maintain a desirable grade. Three percent was ideal for a straight flume. Sometimes grades of up to 75 percent were used on short stretches. The steeper the grade the more gradual the curves had to be, or else lumber would jam or go over the sides. The maximum curve was 8 degrees. [1]: 395–396
The Powder River Basin is the largest coal mining region in the US, but most of the coal is buried too deeply to be economically accessible. [4] The Powder River Basin coal beds are shaped like elongated bowls and as mines expand from east to west in the Powder River Basin, they will be going "down the sides of the bowl".
A P&H 4100 shovel loads coal into a haul truck at the North Antelope Rochelle Mine.. Coal mining in Wyoming has long been a significant part of the state's economy. Wyoming has been the largest producer of coal in the United States since 1986, [1] and in 2018, coal mines employed approximately 1% of the state's population. [2]
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For comparison, the uranium mined at McArthur River uranium mine, the largest uranium mine in the world, would be equivalent (at a CANDU-typical burnup of 200 MWh/kg) to 4.46 exajoules (1.24 × 10 12 kWh) of thermal energy, but used for the more common types of nuclear reactors, the uranium mine produces less energy content than North Antelope ...
A derrick may also have been used. [2] The construction used 1.8 million board feet of lumber and ended up with a total cost over $100,000. [3] The timber used was mostly Ponderosa pine, a local tree, and it was supported using iron rods. The completed flume was approximately 12 miles (19 km) long and up to 75 feet (23 m) above the river.
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