Where the line fallsdecides what you can build.
Hydrologic and hydraulic analysis, FEMA map revisions and regulatory compliance for projects in and around Special Flood Hazard Areas.
Navigating FEMA ruleswith confidence.
Floodplain work is precise, regulatory and unforgiving of shortcuts.
Whether you’re a developer working toward a CLOMR, a municipality enforcing its floodplain ordinance or a civil engineer who needs a no-rise certification, Creel provides the floodplain services that move a project through review, with the technical depth to back up every number.
Every analysis is built to FEMA standards and documented for the reviewer who has to approve it. You talk to the engineer who runs the model, from the first call to the last comment.
FEMA floodplain analysis
Hydrologic and hydraulic analysis that sets flood zone limits and base flood elevations to FEMA standards.
HEC-RAS hydraulic modeling
Steady and unsteady flow modeling of water surface profiles and floodway encroachments.
CLOMRs & LOMRs
Map revision packages prepared and submitted to update FEMA Flood Insurance Rate Maps.
No-rise certifications
Sealed analysis showing floodway development won’t raise the base flood elevation.
Floodway analysis
Reviews of structures, fill and channel changes for NFIP and local compliance.
Flood zone determinations
Site-specific determinations, elevation certificate review and regulatory guidance.
Fill the floodway.Watch the water answer.
In a regulatory floodway, even a small rise in the base flood elevation isn’t allowed without FEMA’s approval first. Drag the fill in and see why.
Where floodplainwork comes up.
- Residential and commercial development in Special Flood Hazard Areas
- Bridge and culvert replacements that need FEMA coordination
- Channel improvements and stream restoration
- Fill placement and grading within floodplains
- Municipal floodplain development permits
- Flood risk assessments for property acquisition
- Litigation support and expert review
- Levee and floodwall feasibility
Four steps.No shortcuts.
Request FEMA’s effective study and model, and survey what the map doesn’t show.
Duplicate the effective model, correct it, then model existing and proposed conditions.
Report, work maps and forms built for the reviewer who has to approve them.
Direct coordination with FEMA and the floodplain administrator until it clears.
Straightanswers.
What is a base flood elevation?
The water surface elevation of the 1% annual chance flood, published on the Flood Insurance Rate Map in zones such as AE, AH and VE. It sets how high buildings must be elevated and what counts as a rise.
What’s the difference between the floodway and the flood fringe?
The regulatory floodway is the channel and nearby land that must stay open to carry the base flood without raising the water surface more than a designated height. The flood fringe is the rest of the special flood hazard area, where building and fill can be permitted.
Do I need a LOMR after construction?
If your project changes the flood hazard shown on the map, a LOMR updates it. Federal rules require communities to submit technical data for changes that affect base flood elevations within six months of the information becoming available (44 CFR 65.3). Projects that got a CLOMR usually follow up with a LOMR once built.
What do you need from me to start?
The site location, any survey or topo, the proposed plan and any correspondence with the floodplain administrator.