Skip To Content

Floodplain Remapping Project

Colorado Hazard Mapping Program (CHAMP)

The 2013 flood event caused widespread damage and changes along the rivers throughout the County as well as other areas in the state.  In response, the State of Colorado is funding the Colorado Hazard Mapping Program (CHAMP) that will update regulatory floodplain maps for the most affected rivers.

Draft floodplain boundaries for CHAMP year 1 are now available on the Weld County Floodplain Review website.  The draft floodplain maps for the Cache la Poudre River will be presented at the open house meeting on May 10, 2018.  Via the interactive web map you may ask questions or provide comments:


Who Initiated CHAMP?
The Colorado Water Conservation Board (CWCB) initiated CHAMP and the subsequent studies.
What is the timeline of the CHAMP process?
Phase I data was submitted to FEMA in the Spring of 2017 and we anticipate that FEMA will produce Preliminary Flood Insurance Rate Maps (FIRMs) in late 2018.  Phase II data will be released in the Fall of 2017, so we anticipate FEMA Preliminary FIRMs for these areas in late 2019.  The process after receiving Preliminary FIRMs includes a formal public comment and appeal period, further analysis, and the release of final effective FIRMs.  The phase of the map development process can last 18 months or longer and is dependent upon FEMA timelines and budgets.
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 regulatory floodplain maps currently in use.  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 property owners along the major waterways like Cache la Poudre, St. Vrain Creek, South Platte River, Big Thompson, Little Thompson, etc. may find that their property and structures are now located within the floodplain/floodway.  Some properties and structures 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 map and ask questions or provide comments via the interactive web map  Weld County will conduct community meetings to show the maps, answer questions, and record comments that provide corrections or updates that could improve map accuracy.  Weld County Staff will then pass this information along to the CWCB.
When do the draft maps become effective?
FEMA adoption is anticipated by 2020 for Phase I, and by 2021 for Phase II.  Formal public comment will be collected as part of the FEMA adoption process.  Once adopted by FEMA, the maps become the effective Flood Insurance Rate Maps (FIRMs) and will then be used for both insurance and regulatory purposes.
Why is Weld County involved?
Weld County is involved because the CWCB delegates its authority to the County to enforce the regulatory floodplain.  Weld 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).


Planning and Building Department

1555 N 17th Ave
Greeley, CO 80631

Phone: (970) 400-6100
Fax: (970) 304-6498

Hours of Operation
Monday - Friday - 7:30 a.m. - 4:30 p.m.

Diana Aungst

Angela Snyder