The damage to Louisiana was estimated at around $1 billion. In Homestead, Florida-the hardest hit community-more than 99% of the mobile homes were completely destroyed.Īfter leaving Florida, Andrew moved into the Gulf of Mexico and made a second landfall near Point Chevreuil, Louisiana, on August 26, 1992, as a Category 3 hurricane with winds of 115 mph and a central pressure of 956 millibars. It caused an estimated $26 billion in damage in the United States making it at the time the most expensive natural disaster in United States history, not to be surpassed until Hurricane Katrina 13 years later. It struck South Miami-Dade County (then known as Dade County) during the pre-dawn hours on Monday, August 24, 1992. It’s one of only four hurricanes to make landfall in the United States as a Category 5 since 1900 (the others being the 1935 Florida Keys Labor Day storm, Hurricane Camille in 1969, and Hurricane Michael in 2018). When it made landfall, Andrew was a Category 5 hurricane, with maximum sustained winds of 165 mph and a minimum central pressure of 922 millibars. A facility in North Dakota also converts lignite to synthetic natural gas that is sent in natural gas pipelines to consumers in the eastern United States.Hurricane Andrew was the strongest and most devastating hurricane on record to hit southern Florida. Lignite is mostly used to generate electricity. The other 7% was produced in Louisiana, Mississippi, and Montana. About 54% was mined in North Dakota and about 39% was mined in Texas. Lignite is crumbly and has high moisture content, which contributes to its low heating value. Lignite coal deposits tend to be relatively young and were not subjected to extreme heat or pressure. Lignite contains 25%–35% carbon and has the lowest energy content of all coal ranks. The remainder was produced in Alaska, Colorado, and New Mexico. coal production in 2020 was subbituminous and about 88% was produced in Wyoming and 8% in Montana. Most subbituminous coal in the United States is at least 100 million years old. Subbituminous coal typically contains 35%–45% carbon, and it has a lower heating value than bituminous coal. Bituminous coal was produced in at least 18 states in 2020, but five states accounted for about 74% of total bituminous production: West Virginia (28%), Pennsylvania (14%), Illinois (13%), Kentucky (10%), and Indiana (8%). Bituminous coal is used to generate electricity and is an important fuel and raw material for making coking coal or use in the iron and steel industry. Bituminous coal is the most abundant rank of coal found in the United States, and it accounted for about 44% of total U.S. Bituminous coal in the United States is between 100 million and 300 million years old. In the United States, anthracite is mainly used by the metals industry.īituminous coal contains 45%–86% carbon. All of the anthracite mines in the United States are in northeastern Pennsylvania. Anthracite accounted for less than 1% of the coal mined in the United States in 2020. The rank of a coal deposit is determined by the amount of pressure and heat that acted on the plants over time.Īnthracite contains 86%–97% carbon and generally has the highest heating value of all ranks of coal. The ranking depends on the types and amounts of carbon the coal contains and on the amount of heat energy the coal can produce. Coal is classified into four main types, or ranks: anthracite, bituminous, subbituminous, and lignite.
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