fldzone = 'A99'

Risk tier: High — inside the Special Flood Hazard Area (SFHA).

Zone A99 marks a 1%-annual-chance floodplain that will be protected by a Federal flood-protection system — for example a levee, dam, or floodwall — that is still under construction but far enough along to qualify. It is used only where a legally recognized threshold of construction progress and committed funding has been met.

How it differs from other A zones

The hazard classification is high (A99 is within the SFHA), but because reliable protection is imminent, FEMA applies no Base Flood Elevations and no floodway to A99 areas:

• staticbfe is NULL — no BFE is determined.
• Building requirements are minimal compared to AE, reflecting the expected protection.

Once the system is certified as complete and providing base-flood protection, the area is typically re-mapped out of the SFHA (often to a shaded X).

Building and insurance implications

• Flood insurance is required for mortgaged structures, but standard A99 rating is favorable.
• New construction is not required to meet the elevation standards of a detailed A-zone.

zonesubty values

In the data

SELECT lrid, parceladdr, zonesubty
FROM   lr_parcel_us
WHERE  fldzone = 'A99';

See also: Zone AR (protection system being restored), the overview.