A very narrow escape and another Columbus sinkhole. The tractor stayed out of the sinkhole even though the ground was collapsing beneath it into a hidden sinkhole. A sinkhole, also known as a sink hole, is a depression in the ground that is caused by some form of collapse of the surface layer. In this case, it collapsed when the tractor went over it. Sinkholes can be huge, 3.3 to 2,000 ft., both in diameter and depth. They vary in from soil-lined bowls to bedrock-edged chasms. Sinkholes can be formed gradually or suddenly, and are found worldwide. They not only take homes, but kill people. A lot of this one wasn't photographed because it was beneath the photographer. Near the anniversary of the world famous, Columbus, Ohio, sinkhole. It made international headlines--serious International headlines. It was the Big Hole seen around the world. A 40-foot-wide hole opened up on W. Broad Street (the very center of Columbus). Besides that, a young lawyer and his gold Mercedes Benz fell 26 feet to the bottom. http://www.dispatch.com/content/stories/local/2011/07/09/the-big-hole-seen-round-the-world.html Other sinkholes in the news recently include a house in Florida that sank and killed the owner. The authorities evacuated neighbors around a sinkhole that swallowed the interior of a Florida house — and took a man to his death. It is likely to keep growing. Jeffrey Bush, 36, hasn't been heard from since a 20-foot-deep by 20-foot-wide hole opened beneath his family's home near Tampa. http://usnews.nbcnews.com/_news/2013/03/01/17145165-massive-sinkhole-swallows-florida-man-and-its-still-growing? BOWLING GREEN, Ky. A sinkhole under the National Corvette Museum in Bowling Green engulfed eight cars early Wednesday. Suddenly, the floor gave out. Eight corvettes, from the 1960s to the previous decade, that were inside the Skydome area were swallowed by the giant sinkhole, including the one-millionth Corvette made. http://www.wdrb.com/story/24702432/sinkhole-damages-six-cars-at-corvette-museum Another Ohio sinkhole formed recently: "Sinkhole nearly swallows Metro bus in Cincinnati, closes down street The driver was on his way back to the garage when his vehicle 'just tilted back, very Titanic-esque' as the crater formed on Shields St. on Thursday night." http://www.nydailynews.com/news/national/sinkhole-swallows-metro-bus-cincinnati-article-1.1837465 Ohio's Bluehole is a sinkhole. Deep spring basins formed by the karst processes and located inland also are called blue holes, for example, Blue Hole (Castalia) in Ohio. A blue hole is a cave or an underwater sinkhole. They can also called vertical caves. http://en.wikipedia.org/wiki/Blue_hole Also mine cave ins have closed freeways, such as I-70 west of Columbus. On I-70 near Cambridge, OH, a sinkhole in the middle of the highway appeared when 12 feet of pavement suddenly collapsed into an abandoned underground mine. Three cars and a truck partially entered the hole, but only one was injured. Part of I-70 was closed completely for about 3.5 months for repairs. In 1997, because of efforts following the I-70 collapse, the Federal Highway Administration (FHWA), nine States, and a turnpike authority collaborated to form the Interstate Technical Group on Abandoned Underground Mines (ITGAUM) to share information, experiences, and practices; to research the problem of abandoned underground mines; and to explore ways to use modern technologies to locate, assess, and repair the mines. http://www.fhwa.dot.gov/publications/publicroads/03may/01.cfm 14 07 18SinkholeEdEx

• published: 19 Jul 2014
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