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The term 100-year flood indicates that the area has a one-percent chance of flooding in any given year, not that a flood will occur every 100 years. [ 2 ] Such maps are used in town planning , in the insurance industry, and by individuals who want to avoid moving into a home at risk of flooding or to know how to protect their property.
Fort Calhoun Nuclear Generating Station during flood on June 16, 2011. Lists of floods in the United States provide overviews of major floods in the United States. They are organized by time period: before 1901, from 1901 to 2000, and from 2001 to the present.
The 1945 flood of the Ohio River was the second-worst in Louisville, Kentucky, history after the one in 1937 and caused the razing of the entire waterfront district of the neighborhood of Portland. Afterwards, flood walls were erected around the city to 3 feet (0.91 m) above the highest level of the '37 flood.
Updated maps from Williamson County show an increase of 6,000 structures in the 100-year flood plains. The last information available was from 1994.
This flood was particularly devastating since the region had little or no levees at the time. Among the hardest hit were the Wyandot who lost 100 people in the diseases that occurred after the flood. The flood also is the highest recorded for the Mississippi River at St. Louis. After the flood, Congress in 1849 passed the Swamp Act providing ...
Adamsville, never rebuilt after being largely destroyed by a flood. Alamo Crossing, Submerged in Alamo Lake. [7] Aubrey Landing, flooded during the formation of Lake Havasu. [8] Castle Dome Landing, submerged in Martinez Lake. [9] [10] Colorado City, destroyed by the Great Flood of 1862; La Laguna, the former site is underneath Mittry Lake.
Nationally, 2,279 communities don't participate in the voluntary program that provides insurance against flood damage, according to the Federal Emergency Management Agency, or FEMA, and most ...
A 100-year flood is a flood event that has on average a 1 in 100 chance (1% probability) of being equaled or exceeded in any given year. [1] A 100-year flood is also referred to as a 1% flood. [2] For coastal or lake flooding, a 100-year flood is generally expressed as a flood elevation or depth, and may include wave effects. For river systems ...
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