High hazard zone definition
High hazard zone means those portions of the floodplain where an unacceptably high hazard to human safety exists because the product number of flow velocity (measured in feet/second) times flow depth (measured in feet) equals or exceeds four, or because flow depths equal or exceed four feet (Boulder Revised Code 9-2-2(a)).
High hazard zone means lands within the furthest landward extent of the floodway and erosion hazard zone, as designated on a FIRM.
High hazard zone means those portions of the floodplain where an unacceptably high hazard to human safety exists defined as those areas where the product number of flow velocity (measured in ft./sec.) times flow depth (measured in feet) equals or exceeds four, or where flow depths equal or exceed four feet. (Floodplain and Critical Facilities)
More Definitions of High hazard zone
High hazard zone means any area subject to high risk from flood, tsunami, wildland-urban interface fire, seismic or other geologic hazard, or man-made disaster such as hazardous material exposure, as defined either by a local hazard mitigation plan or by the secretary.