As Dewey Beach prepares for its March 20 meeting on the proposed resiliency plan, I hope the town will focus on one element that determines whether the entire effort has lasting value: the quality of the flood-risk map that underlies the plan.
Our current FEMA maps are decades old. They do not include modern storm-surge modeling, wave runup, dune overtopping, bayside surge dynamics, groundwater rise or the 500-year floodplain. They also rely on bathtub-style inundation assumptions that treat water as if it rises evenly in a calm basin. Anyone who has watched a nor'easter or hurricane push water through our streets knows this is not how coastal flooding works.
A real resiliency plan begins with a real map – one that reflects the physics of water, not the convenience of outdated lines on paper.
Years ago, when I earned my captain's license, I learned a chart is only as good as the information it contains. The most useful charts include reference boxes – notes that explain the hazards, defenses and conditions that matter to mariners. Dewey's resiliency map should follow the same principle. It should show not only where the water goes, but what protective measures would be required to change the outcomes.
For example, a bayside reference box might note what level of protection a modest 4-foot barrier and pump system might provide under various storm scenarios. An oceanside box might show what an engineered dune and berm system would accomplish in reducing overtopping and runup.
These boxes would not commit the town to any particular project; they could simply give residents and officials an honest picture of what different levels of protection look like.
The current $75,000 budget cannot produce a full dynamic flood map. But it can produce something equally important: a clear description of what a modern map requires, what it would cost and what grants could fund it.
That scoping work should be the primary deliverable of this phase. Without it, the town risks building a resiliency plan on the same outdated assumptions that have guided us for too long. Dewey deserves a plan grounded in reality.
A modern map of vulnerabilities is the foundation for every responsible decision that follows, from emergency operations to capital planning to long-term community safety.
If we start with an honest chart, we can navigate the future with clarity.
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