Study Overview

In Fiscal Year 2013, the Federal Emergency Management Agency (FEMA) initiated a coastal flood risk study for the Southwest Florida Study Area that affects Charlotte, Collier, Desoto, Hendry, Lee, and Sarasota Counties. The results of that study have been incorporated into updated digital Flood Insurance Rate Maps (FIRMs) and Flood Insurance Study (FIS) reports for these counties.

What Areas of Collier County have been included in this study?

In terms of the flood maps, the County is divided into a total of 156 FIRM panels. The panels in blue color (see image) are the panels included in the study.

Click Image to Enlarge.

FEMA National Flood Hazard Layer

• FEMA National Flood Hazard Layer: https://www.fema.gov/flood-maps/national-flood-hazard-layer

  NFHL ArcGIS Viewer: https://hazards-fema.maps.arcgis.com/apps/webappviewer/index.html?id=8b0adb51996444d4879338b5529aa9cd

Letter of Map Change (LOMC) Updated Revalidation Letter (Updated 05/10/2024)

The 2024 Collier County Coastal Flood Map, Revalidation Letter 18-04-0009V has been updated (version 2) as of 05/10/2024. The original Revalidation Letter (Version 1) was released on 02/09/2024, but was updated on 05/10/2024 to reflect updates to Category 4 LOMCs within the 08/08/2024 SOMA. The Revalidation Letter represents LOMCs that have been revalidated, as indicated in either Category # 2 or Category # 4 of the 2024 SOMA Letter referenced below. 

2024 Summary of Map Action (SOMA) Letter

The 2024 SOMA Letter provides an overview of Letters of Map Change (LOMC) that are scheduled to be revalidated, rescinded, or superseded from the 2012 Collier County Digital Flood Insurance Rate Map (DFIRM) to the 2024 Collier County Coastal Flood Map. The Categories in the SOMA are as follows:

• Reference Category # 1: Not Applicable
• Reference Category # 2: Revalidated (LOMC still valid for use)

• 2a - LOMCs Revalidated on Revised Map Panels (Panels ending in "J" Suffix)
• 2b - LOMCs Revalidated on Non-Revised Map Panels (Panels ending in "H" Suffix)

• Reference Category # 3: LOMCs Rescinded OR Superseded (LOMC No Longer Valid)

 

• 3.1 - Insufficient information available to make a determination. RESCINDED (NO LONGER VALID)
• 3.2 - Lowest Adjacent Grade and Lowest Finished Floor are below the proposed Base Flood Elevation. RESCINDED (NO LONGER VALID)
• 3.3 - Lowest Ground Elevation is below the proposed Base Flood Elevation. RESCINDED (NO LONGER VALID)
• 3.4 - Revised hydrologic and hydraulic analyses. RESCINDED (NO LONGER VALID)
• 3.5 - Revised topographic information. RESCINDED (NO LONGER VALID)
• 3.6 - Superseded by another LOMC.SUPERSCEDED - Replaced by another LOMC (Refer to FloodInfoRequest@colliercountyfl.gov for further assistance if updated LOMC document cannot be provided by applicant)