In some cases, the area of land subject to flooding has not changed, but we have now have better information to base predictions on where the flooding is likely to occur. During floodplain studies, we gather more information about topography, elevations, bridges and the amount of impervious cover.
The City does not grandfather development from using the best available floodplain information. If your property is shown to be in the floodplain with the new study, then you may be grandfathered for flood insurance premiums, but will no longer be eligible for a preferred risk policy. Visit www.floodsmart.gov to learn more about flood insurance or contact your insurance agent.