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Floodplain Management

Understanding Flood Risks, Protecting What Matters

At Mile High Flood District, we help communities understand and reduce flood risks. As a Cooperating Technical Partner with FEMA, we provide data, mapping, and support to floodplain administrators.

What Our Team Does:

  • Map flood hazard zones and keep them up to date.
  • Review changes to flood zones caused by new projects.
  • Update Flood Insurance Rate Maps (FIRM).
  • Ensure local knowledge and real-world conditions shape our flood studies.

 

For Property Owners: What Flood Map Changes Mean for You 

If you’ve received a notice about flood mapping changes, you may have questions. Updated maps help reflect real flood risks, which can impact insurance, building requirements, and more. Learn what these changes mean and how they may affect your property.

PDF | See how FHAD data effects flood insurance rates.

 

Keeping the regulatory flood hazard data up-to-date both on a local and national level is important for many reasons, including saving people money on their flood insurance. That’s why the Mile High Flood District works closely with FEMA to incorporate Flood Hazard Area Delineation (FHAD) data into the Flood Insurance Rate Maps (FIRMs) and Flood Insurance Studies (FISs) through a process called Physical Map Revision (PMR).

For Local Government Partners: Tools & Resources 

Floodplain management is a team effort. We work with local governments to provide the data, tools, and guidance needed to make informed decisions about flood risks. Explore resources to support your community’s floodplain management efforts.

FEMA GeoPortal

NFIP 101 Course and Reference Guide

PDF| MHFD Floodplain RegulationPDF| LOMR vs. Appeal Fact Sheet
Applying for a CLOMR/LOMR? Start Here. 

To request a change to preliminary Flood Insurance Rate Maps (FIRM), you’ll need to submit a Letter of Map Change (LOMC). These requests can be submitted anytime but must follow specific guidelines. Use the resources below to ensure your submission meets all requirements.

PDF | LOMC Guidelines

 

Let's Talk Floodplains!

Need a presubmittal meeting? Have questions on your application? Reach out, and we’ll set up a time to chat!

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Applying for a FHAD? Start Here. 

Floodplain mapping helps keep communities safe by tracking changes in flood risks and boundaries. The Mile High Flood District updates these maps using Flood Hazard Area Delineation (FHAD) and Master Drainage Plan (MDP) studies.

For details, explore floodplain maps in the Data Viewer and download the FHAD resources below.

The FHAD guidelines were last updated in January 2022. For an overview of the updates made, please watch this video.

PDF | FHAD Common Mistakes Guidance DocumentPDF | FHAD Guidelines January 2022ZIP | FHAD Tools – GIS plugins for HEC-RAS reviews (last updated 1/5/2024)ZIP | FHAD Symbology (layer package and geodatabase containing final data deliverables format)ZIP | FHAD Templates (report overview, spreadsheet, and table)ZIP | One-Percent Plus Flow Frequency Analysis