Federal Emergency Management Agency 20090925 FEMA-DFIRM-Final Washington, DC Federal Emergency Management Agency http://www.fema.gov/msc Federal Emergency Management Agency 20090925 The Digital Flood Insurance Rate Map (DFIRM) Database depicts flood risk information and supporting data used to develop the risk data. The primary risk classifications used are the 1-percent-annual-chance flood event, the 0.2-percent-annual- chance flood event, and areas of minimal flood risk. The DFIRM Database is derived from Flood Insurance Studies (FISs), previously published Flood Insurance Rate Maps (FIRMs), flood hazard analyses performed in support of the FISs and FIRMs, and new mapping data, where available. The FISs and FIRMs are published by the Federal Emergency Management Agency (FEMA). In addition to the preceding, required text, the Abstract should also describe the projection and coordinate system as well as a general statement about horizontal accuracy. The FIRM is the basis for floodplain management, mitigation, and insurance activities for the National Flood Insurance Program (NFIP). Insurance applications include enforcement of the mandatory purchase requirement of the Flood Disaster Protection Act, which "... requires the purchase of flood insurance by property owners who are being assisted by Federal programs or by Federally supervised, regulated or insured agencies or institutions in the acquisition or improvement of land facilities located or to be located in identified areas having special flood hazards, " Section 2 (b) (4) of the Flood Disaster Protection Act of 1973. In addition to the identification of Special Flood Hazard Areas (SFHAs), the risk zones shown on the FIRMs are the basis for the establishment of premium rates for flood coverage offered through the NFIP. The DFIRM Database presents the flood risk information depicted on the FIRM in a digital format suitable for use in electronic mapping applications. The DFIRM database is a subset of the Digital FIS database that serves to archive the information collected during the FIS. 20090925 FIRM and FIS Effective Date Complete Unknown -89.598983 -88.659335 36.164528 35.580711 ISO 19115 Topic Category hydrology environment inlandWaters structure transportation elevation FEMA NFIP Topic Category DFIRM FIRM FEMA Flood Hazard Zone DFIRM Database Special Flood Hazard Area Digital Flood Insurance Rate Map CBRS Coastal Barrier Resources System Riverine Flooding Coastal Flooding NFIP Base Flood Elevation SFHA Flood Insurance Rate Map Floodway None REGION 04 STATE TN COUNTY CROCKETT COUNTY-FIPS 033 COMMUNITY CITY OF ALAMO FEMA-CID 470245 COMMUNITY CITY OF BELLS FEMA-CID 470220 COMMUNITY CROCKETT COUNTY UNINCORPORATED AREAS FEMA-CID 47033C COMMUNITY CROCKETT COUNTY UNINCORPORATED AREAS FEMA-CID 470383 COMMUNITY CITY OF FRIENDSHIP FEMA-CID 470430 COMMUNITY TOWN OF GADSDEN FEMA-CID 470221 COMMUNITY TOWN OF MAURY CITY FEMA-CID 470431 Restricted Access restricted without authorization from the State of Tennessee Department of Finance and Administation GIS Department. Please see point of contact to retrieve data. Federal Emergency Management Agency mailing

500 C Street, S.W.

Washington District of Columbia 20472 USA 1-800-358-9616 miphelp@mapmodteam.com Federal Emergency Management Agency 2008 map Washington, DC Federal Emergency Management Agency http://www.fema.gov/msc Federal Emergency Management Agency 2008 raster digital data Washington, DC Federal Emergency Management Agency http://www.fema.gov/msc The DFIRM Database consists of community based vector files and associated attributes produced in conjunction with the hard copy FEMA FIRM. The published effective FIRM and DFIRM maps are issued as the official designation of the SFHAs. As such they are adopted by local communities and form the basis for administration of the NFIP. For these purposes they are authoritative. Provisions exist in the regulations for public review, appeals and corrections of the flood risk information shown to better match real world conditions. As with any engineering analysis of this type, variation from the estimated flood heights and floodplain boundaries is possible. Details of FEMA's requirements for the FISs and flood mapping process that produces these data are available in the Guidelines and Specifications for Flood Hazard Mapping Partners. Attribute accuracy was tested by manual comparison of source graphics with hardcopy plots and a symbolized display on an interactive computer graphic system. Independent quality control testing of FEMA's DFIRM database was also performed. To obtain more detailed information in areas where Base Flood Elevations (BFEs) and/or floodways have been determined, users are encouraged to consult the Flood Profiles and Floodway Data and/or Summary of Stillwater Elevations tables contained within the FIS report that accompanies this DFIRM database. Users should be aware that BFEs shown in the S_BFE table represent rounded whole-foot elevations. These BFEs are intended for flood insurance rating purposes only and should not be used as the sole source of flood elevation information. Accordingly, flood elevation data presented in the FIS report must be used in conjunction with the FIRM for purposes of construction and/or floodplain management. The 1-percent-annual-chance water-surface elevations shown in the S_XS table match the regulatory elevations shown in the FIS report. When FEMA revises an FIS, adjacent studies are checked to ensure agreement between flood elevations at the boundaries. Likewise flood elevations at the confluence of streams studied independently are checked to ensure agreement at the confluence. The FIRM and the FIS are developed together and care is taken to ensure that the elevations and other features shown on the flood profiles in the FIS agree with the information shown on the FIRM. However, the elevations as shown on the FIRM are rounded whole-foot elevations. They must be shown so that a profile recreated from the elevations on the FIRM will match the FIS profiles within one half of one foot. Data contained in the DFIRM Database files reflect the content of the source materials. Features may have been eliminated or generalized on the source graphic, due to scale and legibility constraints. With new mapping, FEMA plans to maintain full detail in the spatial data it produces. However, older information is often transferred from existing maps where some generalization has taken place. Flood risk data are developed for communities participating in the NFIP for use in insurance rating and for floodplain management. Flood hazard areas are determined using statistical analyses of records of river flow, storm tides, and rainfall; information obtained through consultation with the communities; floodplain topographic surveys; and hydrological and hydraulic analysis. Both detailed and approximate analyses are employed. Generally, detailed analyses are used to generate flood risk data only for developed or developing areas of communities. For areas where little or no development is expected to occur, FEMA uses approximate analyses to generate flood risk data. Typically, only drainage areas that are greater than one square mile are studied. The DFIRM Database consists of community based vector files and associated attributes produced in conjunction with the hardcopy FEMA FIRM. The published effective FIRM and DFIRM are issued as the official designation of the SFHAs. As such they are adopted by local communities and form the basis for administration of the NFIP. For these purposes they are authoritative. Provisions exist in the regulations for public review, appeals and corrections of the flood risk information shown to better match real world conditions. As with any engineering analysis of this type, variation from the estimated flood heights and floodplain boundaries is possible. Details of FEMA's requirements for the FISs and flood mapping process that produces these data are available in the Guidelines and Specifications for Flood Hazard Mapping Partners. Horizontal accuracy was tested by manual comparison of source graphics with hardcopy plots and a symbolized display on an interactive computer graphic system. Independent quality control testing of FEMA's DFIRM database was also performed. The DFIRM Database consists of community based vector files and associated attributes produced in conjunction with the hardcopy FEMA FIRM. The published effective FIRM and DFIRM maps are issued as the official designation of the SFHAs. As such they are adopted by local communities and form the basis for administration of the NFIP. For these purposes they are authoritative. Provisions exist in the regulations for public review, appeals and corrections of the flood risk information shown to better match real world conditions. As with any engineering analysis of this type, variation from the estimated flood heights and floodplain boundaries is possible. Details of FEMA's requirements for the FISs and flood mapping process that produces these data are available in the Guidelines and Specifications for Flood Hazard Mapping Partners. Vertical accuracy was tested by manual comparison of source graphics with hardcopy plots and a symbolized display on an interactive computer graphic system. Independent quality control testing of FEMA's DFIRM database was also performed. Federal Emergency Management Agency 20090925 The sources of authority for this Flood Insurance Study are the National Flood Insurance Act of 1968 and the Flood Disaster Protection Act of 1973. This FIS was prepared to include incorporated communities within Crockett County into a countywide-format FIS. paper 2008 publication date STUDY1 Spatial and attribute information, floodplain widths, BFEs, floodplain location, general structures, FIRM Panel Neatlines, cross sections USGS 20020101 online 20020101 publication date BASE1 USGS Quad Index NOAA, NGS 20061129 online 20061129 publication date BASE2 Benchmarks State of Tennessee Department of Finance and Administration GIS Department 20061030 online 20061030 publication date BASE3 Political Boundaries State of Tennessee Department of Finance and Administration GIS Department 20061030 online 20061030 publication date BASE4 Transportation State of Tennessee Department of Finance and Administration GIS Department 20061030 online 20061030 publication date BASE5 Hydrology The DFIRM Database is compiled in conjunction with the hardcopy FIRM and the final FIS report. The specifics of the hydrologic and hydraulic analyses performed are detailed in the FIS report. The results of these studies are submitted in digital format to FEMA. These data and unrevised data from effective FIRMs are compiled onto the base map used for DFIRM publication and checked for accuracy and compliance with FEMA standards. STUDY1 BASE1 BASE2 BASE3 BASE4 BASE5 20090925 State Plane Coordinate System 1983 4100 35.25 36.4166667 -86.000000 34.333333 1968500.00000 0.0 coordinate pair .304801 .304801 survey feet North American Datum of 1983 Geodetic Reference System 80 6378137 298.25 North American Vertical Datum of 1988 10 feet Attribute values S_BFE Location and attributes for base flood elevations lines shown on DFIRM FEMA Guidelines and Specifications for Flood Hazard Mapping Partners, Appendix L: Guidance for Preparing Draft Digital Data and DFIRM Databases (available at http://www.fema.gov/fhm/dl_cgs.shtm) S_FIRM_Pan Location and attributes for DFIRM hardcopy map panels FEMA Guidelines and Specifications for Flood Hazard Mapping Partners, Appendix L: Guidance for Preparing Draft Digital Data and DFIRM Databases (available at http://www.fema.gov/fhm/dl_cgs.shtm) S_Fld_Haz_Ar Location and attributes flood insurance risk zones on the DFIRM FEMA Guidelines and Specifications for Flood Hazard Mapping Partners, Appendix L: Guidance for Preparing Draft Digital Data and DFIRM Databases (available at http://www.fema.gov/fhm/dl_cgs.shtm) S_Fld_Haz_Ln Location and attributes for boundaries of flood insurance risk zones on the DFIRM FEMA Guidelines and Specifications for Flood Hazard Mapping Partners, Appendix L: Guidance for Preparing Draft Digital Data and DFIRM Databases (available at http://www.fema.gov/fhm/dl_cgs.shtm) S_Label_Ld Location and attributes for leader lines on transportation and hydrography labels shown on the DFIRM FEMA Guidelines and Specifications for Flood Hazard Mapping Partners, Appendix L: Guidance for Preparing Draft Digital Data and DFIRM Databases (available at http://www.fema.gov/fhm/dl_cgs.shtm) S_Label_Pt Location and attributes for transportation and hydrography labels shown on the DFIRM FEMA Guidelines and Specifications for Flood Hazard Mapping Partners, Appendix L: Guidance for Preparing Draft Digital Data and DFIRM Databases (available at http://www.fema.gov/fhm/dl_cgs.shtm) S_Perm_Bmk Location and attributes for bench marks on the DFIRM FEMA Guidelines and Specifications for Flood Hazard Mapping Partners, Appendix L: Guidance for Preparing Draft Digital Data and DFIRM Databases (available at http://www.fema.gov/fhm/dl_cgs.shtm) S_Pol_Ar Location and attributes for political jurisdictions shown on the DFIRM FEMA Guidelines and Specifications for Flood Hazard Mapping Partners, Appendix L: Guidance for Preparing Draft Digital Data and DFIRM Databases (available at http://www.fema.gov/fhm/dl_cgs.shtm) S_Pol_Ln Location and attributes for political boundaries shown on the DFIRM FEMA Guidelines and Specifications for Flood Hazard Mapping Partners, Appendix L: Guidance for Preparing Draft Digital Data and DFIRM Databases (available at http://www.fema.gov/fhm/dl_cgs.shtm) S_Quad_Index Location and attributes for USGS quadrangle maps covering the DFIRM area. FEMA Guidelines and Specifications for Flood Hazard Mapping Partners, Appendix L: Guidance for Preparing Draft Digital Data and DFIRM Databases (available at http://www.fema.gov/fhm/dl_cgs.shtm) S_Trnsport_Ln Location and attributes for roads, railroads and other transportation features shown on the DFIRM FEMA Guidelines and Specifications for Flood Hazard Mapping Partners, Appendix L: Guidance for Preparing Draft Digital Data and DFIRM Databases (available at http://www.fema.gov/fhm/dl_cgs.shtm) S_Wtr_Ar Location and attributes for hydrography features shown on DFIRM FEMA Guidelines and Specifications for Flood Hazard Mapping Partners, Appendix L: Guidance for Preparing Draft Digital Data and DFIRM Databases (available at http://www.fema.gov/fhm/dl_cgs.shtm) S_Wtr_Ln Location and attributes for hydrography features shown on DFIRM FEMA Guidelines and Specifications for Flood Hazard Mapping Partners, Appendix L: Guidance for Preparing Draft Digital Data and DFIRM Databases (available at http://www.fema.gov/fhm/dl_cgs.shtm) The DFIRM Database is made up of several data themes containing both spatial and attribute information. These data together represent the current flood risk for the subject area as identified by FEMA. The attribute tables include SFHA locations, flood zone designations, BFEs, political entities, cross-section locations, FIRM panel information, and other data related to the NFIP. Appendix L of FEMA Guidelines and Specifications for FEMA Flood Hazard Mapping Partners contains a detailed description of each attribute code and a reference to other relevant information. The following tables are included in this data set: L_Comm_Info S_BFE S_FIRM_Pan S_Fld_Haz_Ar S_Fld_Haz_Ln S_Label_Ld S_Label_Pt S_Perm_Bmk S_Pol_Ar S_Pol_Ln S_Quad_Index S_Trnsport_Ln S_Wtr_Ar S_Wtr_Ln Study_Info Files with Not Populated (NP) values in attributes: s_transport_ln - label_type field has NP values where attribute information was not provided State of Tennessee Department of Finance and Administration GIS Department Dennis Pederson Director of GIS Services mailing and physical address

312 8th Ave. North Suite 1600

Nashville TN 37243 USA 615-741-1534 dennis.pederson@tn.gov 8am - 4pm Contact State of Tennessee Department of Finance and Administration GIS Department See point of contact ARCE http://www.tn.gov/finance/article/tnbmp.html ESRI Shapefile http://www.fema.gov/msc MapInfo Interchange file (MIF) http://www.fema.gov/msc ARCE CD-ROM ISO 9660 ESRI Shapefile CD-ROM ISO 9660 MapInfo Interchange file (MIF) CD-ROM ISO 9660 Contact Distributor 20090925 Daryle Fontenot Watershed IV Alliance Project Manager mailing and physical address

6201 Fairview Road Suite 400

Charlotte NC 28210 USA 704-643-0108 dfontenot@watershedconcepts.com FGDC Content Standards for Digital Geospatial Metadata FGDC-STD-001-1998 http://hazards.fema.gov http://www.epsg.org FEMA NFIP Metadata Content and Format Standard