![]() Property owners are encouraged to review the updated maps and discuss implications with their insurance agent. When new maps are issued, your risk may have changed along with your flood insurance requirements. In general, updated flood levels will increase, i.e., more properties are likely to be in the updated floodplain. What is the general impact of new floodplains? Are more properties going to be in the floodplain? The updated maps encompass the Upper Brushy Creek Water Control and Improvement District (WCID) boundary, which includes much of southwest Williamson County. The WCID then partnered with FEMA and the Texas Water Development Board to complete the process. Communities within the watershed desired to use the modeling as the basis for a comprehensive mapping update. In 2012, the Upper Brushy Creek Water Control and Improvement District (WCID) initiated a flood protection plan that included watershed modeling. Who initiated the update?įEMA initiated a partial update in 2010. There are no comprehensive updates foreseen in next 10 years. Several factors influence the frequency with which flood maps may be updated, such as the extent of new development and the completion of flood-control projects. Flood zone designations may be revised when new and more accurate information becomes available because of a FEMA-funded restudy or because the community makes the information available to FEMA. The Federal Emergency Management Agency (FEMA) maintains and updates data through Flood Insurance Rate Maps (FIRMs) and risk assessments. Furthermore, analysis tools and historical data collection have improved over time and will increase map accuracy.įlood hazard mapping is an important part of the National Flood Insurance Program (NFIP), as it is the basis of NFIP regulations and flood insurance requirements. Watershed conditions such as topography have changed and there has been significant added development. ![]() The maps are being updated because the majority of the maps are based on analyses that were performed over 25 years ago. On January 30, 2017, FEMA posted digital copies of preliminary Flood Insurance Rate Maps (FIRM), Flood Insurance Study (FIS) report materials, and supporting data on their Map Service Center website.Use the "Address Search" to enter an address and zoom the map into the appropriate area.Īlternatively, the following link is provided by FEMA to access the same information, however, the Williamson County webpage linked previously is more user friendly: Simply click the blue "I want to…" button to see a list of options. Williamson County has prepared a Simple Mapping Tool that compares the current effective floodplain limits to the proposed new floodplain limits. In most cases, mapped drainage boundaries have not changed. The new floodplain maps are the result of new technology and data which yields a better assessment of where flooding is most likely to occur close to creeks and more accurately predict floodplain boundaries. The City of Cedar Park was an active member of the Technical Advisory Committee for the UBCWCID watershed study. The new maps are a result of a multi-year study of the Upper Brushy Creek watershed prepared by the Texas Water Development Board (TWDB) and the Upper Brushy Creek Water Control and Improvement District (UBCWCID). The 1% annual chance flood is also referred to as the base flood or 100-year flood. SFHAs are defined as the area that will be inundated by the flood event having a 1% chance of being equaled or exceeded in any given year. ![]() FEMA identifies floodplains in order to calculate flood risks for insurance purposes, particularly within Special Flood Hazard Areas (SFHA). The Department of Homeland Security's Federal Emergency Management Agency (FEMA) is in the process of releasing new floodplain maps for the portion of the City of Cedar Park that lies within Williamson County. View the Interactive Map with General Overview of Changes. Homeowners, renters and business owners in Williamson County are encouraged to look over newly released preliminary flood maps in order to determine their flood risks and make informed decisions.Ĭounty officials and the Federal Emergency Management Agency (FEMA) are presenting the preliminary maps to communities and unincorporated areas in Williamson County in order to help leaders and residents identify known flood risks and use that information to make decisions about buying flood insurance and any future development. ![]() Preliminary Flood Maps in Williamson County, TX Ready for Public View
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