FEMA Flood Hazard Zones

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The Flood Hazard Zones are extracted from the National Flood Hazard Layer, which is a database that contains FEMA’s flood hazard map data. The database contains flood hazard information and supporting data used to develop the information. The primary flood … Continued

Flooding Frequency (Dominant Condition)

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Flooding Frequency, based on soil characteristics, has been updated to the October 2019 NRCS SSURGO data release. Note there is a change to the legend used to depict the data in this update.

EPA Climate Change Indicators – Change in River Flooding

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This indicator examines changes in the size and frequency of inland river flood events in the United States. Indicator data are acquired from the EPA’s Climate Change Indicators in the United States, Fourth Edition, published in 2016.

FEMA Disaster Declarations, Flood, 1958-2018

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This layer displays the total number of federal disaster and emergency declarations for flood events by county for through June, 2018. For this analysis, flood events include the following designated events: Mud/Landslide; Dam/Levee Break; and Flood. For more layers from … Continued

FEMA Flood Hazard Zones, 2019

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The Flood Hazard Zones are extracted from the National Flood Hazard Layer, which is a database that contains FEMA’s flood hazard map data.

Army Corps Enbankments

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This layer displays United States Army Core of Engineers surveyed Embankments. The USACE defines an Embankment as the area of a floodplain from which flood water is excluded by the levee system. For more information about USACE data, visit the … Continued

Army Corps Floodwalls

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This layer displays United States Army Core of Engineers surveyed Floodwalls. The USACE defines an Floodwall as a structure erected to protect areas from high river stages. For more information about USACE data, visit the National Levee Database here .

Army Corps Leveed Areas

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This layer displays United States Army Core of Engineers surveyed Leveed Areas. The USACE defines a Levee Areas as the area of a floodplain from which flood water is excluded by the levee system. For more information about USACE data, … Continued

FEMA Flood Hazard Zones

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The Flood Hazard Zones are extracted from the National Flood Hazard Layer, which is a database that contains FEMA’s flood hazard map data. The database contains flood hazard information and supporting data used to develop the information. The primary flood … Continued

Flooding Frequency (Dominant Condition)

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Flooding Frequency, based on soil characteristics, has been updated to the October 2019 NRCS SSURGO data release. Note there is a change to the legend used to depict the data in this update.