These designated floodplains are those areas determined to be affected by 100 and 500 year floods. Please note - 100 year and 500 year floods do not happen every 100 or 500 years. The Colorado Water Conservation Board's Flood Protection Program maintains a library of Colorado's FIRM maps and their accompanying reports.
Maps are available for most of Colorado's participating counties, cities, and towns.
Portions of maps can also be faxed by calling Joe and requesting a Floodplain Information Fax Request Sheet, or by downloading it here .