Floodplain Remapping Project


Use the links below to view the draft maps and to provide input or ask questions:



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. 

Work on the new floodplain maps has begun. Draft maps for the St. Vrain watershed were submitted to the county in the fall of 2016. Waterways in this watersheds include:
  • Cabin Creek
  • North - South - Middle St. Vrain Creek(s)
  • St. Vrain Creek
  • Boulder Creek
  • North Boulder Creek
  • Middle Boulder Creek
  • South Boulder Creek 
  • Dry Creek #2
  • Two Mile Canyon Creek
  • Coal Creek
  • Rock Creek
  • New Dry Creek Ditch
  • Upper Four Mile Canyon Creek
Other area waterway floodplain maps will be released in the summer of 2017. 

To educate and engage residents, Boulder County will provide information and updates throughout the state's process via this website and a variety of other platforms. Use the links on the right side of this page to learn more about this effort. 

Contact Information

 Floodplain Mapping Links