Floodplain Maps

Floodplain maps provide the basis for flood management, regulation and insurance requirements, by identifying areas flood-prone areas that can threaten life and property. These maps guide flood management programs, including floodplain preservation and regulation, flood safety and preparation, and mitigation.

Find out if your property is located in a floodplain using our interactive floodplain map.

•  City of Boulder 100- and 500-year Floodplain Map
•  City of Boulder Major Drainageway Map

You can also get a Public Flood Map or a Flood Insurance Rate Map from the FEMA Map Service Center.

If you want P&DS to look up your floodplain information for you, fill out the Floodplain Information Request form and either fax it to 303-441-4241 or drop it off in person at 1739 Broadway, third floor.

Floodplain Map Changes

Floodplain maps are periodically updated and revised to reflect changing conditions, such as new topography, land development, updated mapping studies, impacts of flooding, and construction of floodplain improvements.

Floodplain map changes can take several forms:

• Local Map Changes
• Flood Insurance Rate Maps (FIRMs) or Digital Flood Insurance Rate Maps (DFRIMs)
• Letters of Map Change (LOMCs)
• Conditional Letters of Map Amendment (CLOMAs)
  • Conditional Letters of Map Revision (CLOMRs)
  • Conditional Letters of Map Revision based on Fill (CLOMRFs)
  • Letters of Map Amendment (LOMAs)
  • Letters of Map Revision (LOMRs)
  • Letters of Map Revision based on Fill (LOMRFs)

To see the floodplain mapping studies and letter of map revisions that are currently being updated, visit the Utilities Projects and Programs page.

Last Updated on Friday, 15 March 2013 17:11