What does basic rule #3 state regarding development in riverine floodplains?

Basic rule #3 regarding development in riverine floodplains emphasizes that development must not increase flood hazard on other properties. This principle is crucial for floodplain management, as it ensures that the actions taken in one area do not adversely impact neighboring properties by exacerbating flood risks.

By adhering to this rule, communities aim to maintain a balance between development and safety, protecting both individual properties and the overall integrity of the floodplain. The intention is to manage and mitigate flood risks effectively, ensuring that any new development does not lead to increased flooding scenarios, either through altered water flow, reduced absorption capacity, or other hydrological factors.

This rule aligns with the broader goals of the National Flood Insurance Program (NFIP), which aims to reduce the risk of flood damage while allowing for responsible development in flood-prone areas.