![]() ![]() This requirement is for new, substantially modified, or substantially damaged structures. We will refer to it as an A Zone (highlighted) when we mean to separate it from the AE Zone.)Īll of the A Zones require that the top of the lowest floor (including the basement floor) be constructed above or at the Base Flood Elevation (BFE). This document will refer to them as A Zones when we mean to differentiate it from a V Zone. However, they may also be referring to the designated A Zone as opposed to the AE Zone. They may be referring to the difference between the two. FEMA and most consultants (engineers and architects) will often refer to either an A Zone or a V Zone. ![]() (Note – The terminology beyond this point can get confusing. As mentioned previously, each zone has its own sub-designations and subtleties that we attempt to explain below.Ī Zones can be divided into zones AE, A1-30, AO and A. Scour can be a factor in all flood zones. Though A Zones are mostly thought of as stagnant water, initial flooding or receding floodwaters can cause scour against building foundations or other structures. Picture large waves crashing against a foundation. The second category - V Zones - implies “Velocity.” It means forces from the movement of water will be significant. Picture the filling and emptying of a bathtub. ![]() Large waves, higher than 3-feet, are not to be expected in A Zones. In general, one can think of A Zones as locations that will flood, but the floodwaters will mostly rise and then slowly recede. Each are subdivided into specific categories to further designate different conditions. The Federal Emergency Management Agency (FEMA) has two designations for coastal flood zones within the 100-year flood plain - A Zones and V Zones. It can also have a major impact on the overall design of a structure in question. This assessment is crucial in determining whether a property is at risk of flooding. When building in a flood zone, it’s crucial for a property owner to conduct a proper flood risk assessment – no matter if it’s residential, commercial or industrial land. Building in a Flood Zone? Why You Should Conduct a Flood Risk Assessment Before Building ![]()
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