Zone A99 is the flood insurance rate zone that corresponds to areas of the 1-percent chance floodplains that will be protected by a Federal flood protection system where construction has reached specified statutory milestones. Mandatory flood insurance purchase requirements apply.
The Zone D designation on National Flood Insurance Program (NFIP) maps is used for areas where there are possible but undetermined flood hazards. Mandatory flood insurance purchase requirements do not apply, but coverage is available.
Zones B, C, and X
Zones B, C, and X are the flood insurance rate zones that correspond to:
- areas outside the mapped, 1-percent chance ("100-year") floodplains
- areas of 1-percent chance sheet flow flooding where average depths are less than one foot
- areas of 1-percent chance stream flooding where the contributing drainage area is less than one square mile or
- areas protected from the 1-percent chance flood by levees.
Flood insurance is not mandatory in Zones B and C, but is available. Zone X represents the future floodplain as defined by the Future Land Use Map and is used to regulate new construction.
For more information about flood zone designations, contact:
Charlotte-Mecklenburg Storm Water Services