FEMA Preliminary Floodplain Maps – Beaver Creek, Coal Creek & Rock Creek 

Following the flooding in September of 2013, the Colorado Water Conservation Board (CWCB) initiated a program to re-map the predicted 1% chance regulatory floodplain (100-year flood zone) of the most affected waterways. The program was named the Colorado Hazard Mapping Program (CHAMP). You may visit CWCB’s CHAMP website here. For residents of Jefferson County, that included mapping of Beaver Creek, Coal Creek and Rock Creek. 


Who Initiated CHAMP?

The Colorado Water Conservation Board (CWCB) initiated CHAMP and the subsequent studies.

How are the maps produced?

Maps are generated by combining ground surveying information and topographical data, anticipated rainfall and river flows, and then using modeling software to develop flood profiles and flood inundation maps.  The process of developing floodplain maps is a technical undertaking by well-qualified professionals.

Who is affected?

The CWCB draft floodplain maps and associated data will be more accurate and ultimately replace the current regulatory floodplain maps. Both the flood elevations and the floodplain boundaries are likely to change.  Any resident or property owner within or near a current regulatory mapped floodplain may be affected by the new maps in terms of development regulations and eventually flood insurance requirements.  Some properties are being removed from the floodplain but for the most part the floodplain boundaries are expanding.  

How can I view and comment on the draft maps?

You may view the maps on the CWCB CHAMP website. Jefferson County staff can answer questions you have regarding the maps. For questions or comments related to floodplains, contact Planning & Zoning staff

Why is Jefferson County involved?

Jefferson County is involved because the CWCB delegates its authority to the County to enforce the regulatory floodplain.  Jefferson County is part of the NFIP (National Flood Insurance Program) which provides assistance to property owners affected by flooding.  Inclusion into this program requires that the County enforce floodplain regulations and any changes made to the regulatory maps.  Failure to implement these changes could result in the County losing its NFIP status.

When does FEMA get involved?

FEMA is involved through the entire project.  FEMA will manage the process to turn the draft maps into new Flood Insurance Rate Maps (FIRMs).