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FIRMs display areas that fall within the 100-year flood boundary. Areas that fall within the boundary are called special flood hazard areas (SFHAs) and they are further divided into insurance risk zones. 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 ...
Upon completion, Geist Reservoir was the second-largest man-made lake in Indiana, providing approximately 6,900,000,000 US gallons (2.6 × 10 10 L; 5.7 × 10 9 imp gal) of water. The reservoir is located primarily in the northeast corner of Indianapolis and the southeast corner of Fishers , but small parts reach into the nearby towns of ...
The dam was among those authorized by the 1958 Flood Control Act. The dam was designed and built by the Louisville district of the United States Army Corps of Engineers . [ 3 ] The earthen dam was constructed from 1962 [ 4 ] to 1967, with a height of 140 feet (43 m), and 8,000 feet (2,400 m) long at its crest. [ 5 ]
Following is a list of dams and reservoirs in Indiana. All major dams are linked below. The National Inventory of Dams defines any "major dam" as being 50 feet (15 m) tall with a storage capacity of at least 5,000 acre-feet (6,200,000 m 3 ), or of any height with a storage capacity of 25,000 acre-feet (31,000,000 m 3 ).
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The Federal Emergency Management Agency (FEMA) defines the floodplain as the area that would be flooded by a base flood, [8] which is "the flood which has a one percent chance of being equaled or exceeded in any given year". In this sense, a base flood is synonymous with a 100-year flood and a floodplain is synonymous with a special flood ...