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Thus, the total volume of the silts and clays is reduced, resulting in the lowering of the surface. The damage at the surface is much greater if there is differential settlement, or large-scale features, such as sinkholes and fissures. Aquifer compaction is a significant concern along with pumping-induced land subsidence.
Sinkholes can range in size from a few feet wide to hundreds of acres, and anywhere from 1 to 100 feet or more deep. Sinkholes can swallow up cars, parts of roads and even houses.
Sinkholes typically form so slowly they escape notice until a collapse, according to the agency. The USGS says things like groundwater pumping and some construction and development practices can ...
The Chicago flood occurred on April 13, 1992, when repair work on a bridge spanning the Chicago River damaged the wall of an abandoned and disused utility tunnel beneath the river. The resulting breach flooded basements, facilities and the underground Chicago Pedway throughout the Chicago Loop with an estimated 250 million US gallons (1,000,000 ...
Destroyed in Seconds is an American television series that premiered on Discovery Channel on August 21, 2008. [ 2 ] Hosted by Ron Pitts , it features video segments of various things being destroyed fairly quickly (hence, "in seconds") such as planes crashing, explosions, sinkholes, boats crashing, fires, race car incidents, floods, factories, etc.
Over the past 15 years, sinkhole damage costs an average of $300 million a year in the United States. There are several ways to identify a sinkhole in progress.
In modern times, areas known to have quick clay deposits are commonly tested in advance of any major human development. It is not always possible to entirely avoid building on a quick clay site, although modern engineering techniques have found technical precautions which can be taken to mitigate the risk of disaster.
"We encountered some sinkholes," he said. "We encountered some unknown utilities that had to be moved, relocated, adjusted." Construction on the intersection of Campbell Avenue and Republic Road ...