In an AE Zone with a base flood elevation, what must a developer demonstrate to meet Basic Rule #3?

To meet Basic Rule #3 in an AE Zone with a designated base flood elevation, the key requirement is that the proposed development must not increase the water surface elevation more than 1 foot when combined with existing developments. This requirement is crucial because it helps to ensure that new developments do not exacerbate flooding conditions in the area.

The intent behind this rule is to promote safe and sustainable floodplain development. By limiting the increase in water surface elevation to this threshold, the regulation aims to reduce the risk of flooding to adjacent properties and infrastructure, which is a fundamental aspect of floodplain management. This protective measure is vital in areas susceptible to flooding, as it contributes to the overall safety and resilience of the community.

The other options, while possibly relevant to various aspects of urban planning or zoning, do not directly address the floodplain management requirements. They do not focus on the critical issue of maintaining safe elevations in flood-prone areas, which is the central concern of Basic Rule #3 in the context of the National Flood Insurance Program (NFIP).