Who's In? Who's Out? Floodplain Mapping in the City of Norman, Oklahoma

City of Norman

         

In September 2006, the Federal Emergency Management Agency (FEMA) issued a preliminary nationwide release of the new Digital Flood Insurance Rate Maps (DFIRM) and requested public comment. The City of Norman recognized immediately that this new dataset had been developed using outdated information and set about determining the potential impact this release might have on the city as a whole.

As a part of its Stormwater Master Plan, the city was already in the process of acquiring lidar-derived contours. This new information was provided to FEMA to assist in the production of a more accurate flood dataset for the City of Norman. City staff worked extensively with FEMA officials to review each affected area, and in many cases, the recent contour data was used to substantiate significant changes to the earlier release. FEMA reissued the final DFIRM maps for Norman in April 2008, and on August 12, 2008, the Norman City Council voted to approve the use of the newly updated data.

Courtesy of the City of Norman, Oklahoma.

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