How are flood hazard areas and flood levels determined?

Flood hazard areas are determined using:

  • Floodplain topographic surveys
  • Hydro-logic and hydraulic analysis
  • Information obtained through consultation with the community
  • Statistical analyses of records of river flow, storm tides, and rainfall

The detailed FIS covers those areas that are subject to flooding from rivers and streams, along coastal areas and lake shores, or in shallow flooding areas, but do not include areas of less than one square mile.

Show All Answers

1. What is a floodplain?
2. What is a floodway and who designates it?
3. How do I find out if my property is in a floodplain?
4. What are the penalties if I don't secure all my permits?
5. How are premiums calculated?
6. What constitutes as substantial improvement or substantial damage?
7. How are flood hazard areas and flood levels determined?
8. What are flood hazard zones and what do they mean?
9. If a Flood Insurance Rate Map (FIRM) is believed to be incorrect, what can be done to change it?
10. What is Letter Of Map Amendment (LOMA)?
11. What comprises technical or scientific data?
12. What is a Letter Of Map Revision (LOMR)?