VIEW MAPS & PROVIDE FEEDBACK
The interactive webmap (use the button above) is meant to show detailed flood risk zones and related FEMA map amendments or revisions that are currently regulated throughout unincorporated Boulder County. (Data updated on June 1, 2017 to reflect adopted changes to the Floodplain Overlay Zoning District).
- This map will update as new FEMA maps become effective throughout Boulder County and as the Boulder County Board of County Commissioners (BOCC) adopts Best Available Data (see information on maps below)
DRAFT floodplain maps are now available for stream reaches in Phase II of the Colorado Hazard Mapping Program (CHAMP) study. Visit the interactive webmap (by using the button above) to review and provide comments on the draft flood risk zones that are currently under review by Boulder County.
- Comment directly on the map – use the comment tool within the map to provide feedback directly on the map for your property
- We’re looking for local knowledge of new or missing structures such as barns or bridges and elevation data for your property
- Data for Left Hand Creek from Streamcrest through the plains will be posted by mid-February
- Public Meeting Resources
- Project Newsletter – Issue #6 – added Jan. 10, 2018
- Project Newsletter – Issue #5
- Register for the project listserv to receive it by email
ABOUT THE MAPS
The data available online via our DRAFT Floodplain Map Webmap is available to allow the public to be aware of and provide input on the floodplain remapping project from the beginning. Draft map data from Phase I of the CHAMP and related flood studies was adopted June 1, 2017 and map layers in these reaches have been updated to reflect this regulatory change. An exception to this adoption is the data for the Little Thompson reaches within Boulder County – because these data sets were received later, the mapping for the Little Thompson River will be adopted at a later date.
Concerns or questions about these changes should be addressed to the Floodplain Management Team (contact info at the bottom of this page).
The 2013 flood event caused widespread damage and changes along waterways throughout the county and other areas of the state. In response, the State of Colorado is taking steps towards bolstering long-term planning and resiliency efforts by funding the Colorado Hazard Mapping Program (CHAMP) that will update local hazard information including regulatory floodplain maps for the most affected waterways.
Boulder County is supporting this initiative because accurate floodplain maps provide detailed information for property owners on their own flood risks and enable proactive measures to protect people and property before the next significant flood event.
Floodplain maps are under revision for the following waterways (or reaches therein) under the CHAMP study.