FEMA Floodplain Update Along White Rock Creek - January 2012
The Federal Emergency Management Agency (FEMA) released the preliminary Flood Insurance Study (FIS) and Flood Insurance Rate Maps (FIRMs) for the Frisco area in Collin County dated December 30, 2011. The preliminary editions of the FIS and FIRMs incorporate a detailed study of flood hazards for approximately 57 stream miles of creek in Collin County. In the Frisco area, 5 of the FIRMs have been updated and White Rock Creek was one of the streams included in the detailed study of flood hazards. Paper copies are available for viewing at the Engineering Services Department or may be viewed through the Preliminary Interactive Map (PDF).

There will be a Public Comment Period where property owners can submit appeals and protests if they disagree with the maps. The deadline for the Public Comments has not been determined. Once these comments are received and addressed, the maps are expected to be adopted in winter 2012. At that time, the new insurance requirements will take effect. Individuals with general questions about the local map modernization project can call Alyssa Sanders at 972-292-5438.

National Flood Insurance Program
The City of Frisco participates in the National Flood Insurance Program (NFIP) of the Federal Emergency Management Agency (FEMA). As a participating community, the city has adopted Floodplain Management practices through several ordinances that severely limit the development allowed in 100-year floodplains (the area inundated by a storm that has a 1% chance of happening in any year). For property with any portion located within the 100-year floodplain, regardless of structure location, a flood insurance policy may be required.

City of Frisco standards require all new structures be constructed 2 feet above the adjacent water surface elevation of the 100-year floodplain. Additionally, the city requires that no portion of any residential lot be included in the 100-year floodplain. When developing along a major creek within the City of Frisco, the developer must submit a Flood Study to the city showing the 100-year floodplain and water surface elevation based on both current land-use and future land-use assumptions.

Flood Insurance Rate Maps
Flood Insurance Rate Maps (FIRMs) delineate the floodplains throughout the United States and are used by lenders and insurance companies to determine if your property is in a floodplain. The FIRMs for the City of Frisco were last published for Collin County in June 2009 and Denton County in April 2011. Paper copies are available for viewing at the Engineering Services Department or may be viewed and printed online for free at the FEMA Map Service Center.

Letters of Map Revisions
Flood Insurance Rate Maps, like the Frisco landscape, can change. If a developer wishes to alter and/or fill a portion of the floodplain, they must prepare a Flood Study showing no adverse effects or substantial changes in the water surface elevation. This flood study, along with a detailed application, may be submitted to FEMA to be considered for a Letter of Map Revisions. If approved, the Letter of Map Revisions serves as an official revision to the FIRM. Individual property owners may also contest the floodplain designation for their property by submitting information to FEMA.

Lenders and insurance companies are not always aware of these changes, so it may be necessary to call the Engineering Services Department at 972-292-5400 to determine if the floodplain map for your area has changed and to receive a copy of the change. Many Letters of Map Change can also be obtained online from the FEMA Map Service Center.