Texas Water Development Board (TWDB) CTP FY2020 Risk MAP Project 202200522 Version 2.5.3.6 FEMA-DCS-Hydraulics Austin, TX Federal Emergency Management Agency https://hazards.fema.gov Federal Emergency Management Agency 20220521 Recent developments in digital terrain and geospatial database management technology make it possible to protect this investment for existing and future projects to a much greater extent than was possible in the past. The minimum requirement for hydraulics data includes input and output files for all hydraulic models and spatial datasets that are needed to implement the models. (Source: FEMA Guidelines and Standards for Flood Risk Analysis and Mapping.) Development of a hydraulic model to provide water-surface elevations for floodplain mapping requires significant investment in time and resources to obtain and process topographic survey data including cross-section and bridge surveys. 20220521 MIP Submission Date In work Unknown -97.86 -98.89 29.86 28.95 ISO 19115 Topic Category environment inlandWaters FEMA NFIP Topic Category Hydraulics Flood Insurance Rate Map FIRM Flood Hazard Data 0.2-Percent-Annual-Chance Flood 1-Percent-Annual-Chance Flood 2-Percent-Annual-Chance Flood 4-Percent-Annual-Chance Flood 10-Percent-Annual-Chance Flood 1-Percent-Plus-Annual-Chance Flood Stream Lake Water Body Base Flood Elevation Cross Section Stream Centerline Profile Baseline Backwater BFE Flood Profile Floodway Floodway Data Table Bridge Culvert Dam Manning's Roughness Coefficient (Manning's n) None REGION 06 STATE TX HUC8 CIBOLO HYDROLOGIC UNIT 12100304 COUNTY BANDERA COUNTY BEXAR COUNTY COMAL COUNTY GUADALUPE COUNTY KARNES COUNTY KENDALL COUNTY WILSON COUNTY-FIPS 019 COUNTY-FIPS 029 COUNTY-FIPS 091 COUNTY-FIPS 187 COUNTY-FIPS 255 COUNTY-FIPS 259 COUNTY-FIPS 493 COMMUNITY CITY OF ALAMO HEIGHTS COMMUNITY CITY OF BALCONES HEIGHTS COMMUNITY CITY OF BANDERA COMMUNITY CITY OF BOERNE COMMUNITY CITY OF BULVERDE COMMUNITY CITY OF CASTLE HILLS COMMUNITY CITY OF CHINA GROVE COMMUNITY CITY OF CIBOLO COMMUNITY CITY OF CONVERSE COMMUNITY CITY OF ELMENDORF COMMUNITY CITY OF FAIR OAKS RANCH COMMUNITY CITY OF FALLS CITY COMMUNITY CITY OF FLORESVILLE COMMUNITY CITY OF GARDEN RIDGE COMMUNITY CITY OF GREY FOREST COMMUNITY CITY OF HELOTES COMMUNITY CITY OF HILL COUNTRY VILLAGE COMMUNITY CITY OF HOLLYWOOD PARK COMMUNITY CITY OF KARNES CITY COMMUNITY CITY OF KENEDY COMMUNITY CITY OF KIRBY COMMUNITY CITY OF LA VERNIA COMMUNITY CITY OF LEON VALLEY COMMUNITY CITY OF LIVE OAK COMMUNITY CITY OF LYTLE COMMUNITY CITY OF MARION COMMUNITY CITY OF NEW BERLIN COMMUNITY CITY OF NEW BRAUNFELS COMMUNITY CITY OF NIXON COMMUNITY CITY OF OLMOS PARK COMMUNITY CITY OF POTH COMMUNITY CITY OF RUNGE COMMUNITY CITY OF SAN ANTONIO COMMUNITY CITY OF SAN ANTONIO ETJ COMMUNITY CITY OF SANTA CLARA COMMUNITY CITY OF SCHERTZ COMMUNITY CITY OF SEGUIN COMMUNITY CITY OF SELMA COMMUNITY CITY OF SHAVANO PARK COMMUNITY CITY OF SOMERSET COMMUNITY CITY OF ST. HEDWIG COMMUNITY CITY OF STOCKDALE COMMUNITY CITY OF TERRELL HILLS COMMUNITY CITY OF UNIVERSAL CITY COMMUNITY CITY OF VON ORMY COMMUNITY CITY OF WINDCREST FEMA-CID 480036 FEMA-CID 481094 FEMA-CID 480021 FEMA-CID 480418 FEMA-CID 481681 FEMA-CID 480037 FEMA-CID 481141 FEMA-CID 480267 FEMA-CID 480038 FEMA-CID 480710 FEMA-CID 481644 FEMA-CID 480404 FEMA-CID 480671 FEMA-CID 480148 FEMA-CID 480039 FEMA-CID 481643 FEMA-CID 481106 FEMA-CID 480040 FEMA-CID 480405 FEMA-CID 485482 FEMA-CID 480041 FEMA-CID 481050 FEMA-CID 480042 FEMA-CID 480043 FEMA-CID 480692 FEMA-CID 480268 FEMA-CID 481625 FEMA-CID 485493 FEMA-CID 481114 FEMA-CID 481540 FEMA-CID 480672 FEMA-CID 481120 FEMA-CID 480045 FEMA-CID 480035 FEMA-CID 480013 FEMA-CID 480269 FEMA-CID 485508 FEMA-CID 480046 FEMA-CID 480047 FEMA-CID 481264 FEMA-CID 481132 FEMA-CID 480673 FEMA-CID 480048 FEMA-CID 480049 FEMA-CID 480450 FEMA-CID 480689 None Acknowledgement of FEMA would be appreciated in products derived from these data. These digital data are produced for the purposes of updating/creating a FIRM Database and/or Flood Risk Products. Original data development environment may vary. Finishing of the data is done using Esri's ArcGIS software. The submitted geodatabase was created using ArcGIS version 10.3. The hydraulic modeling was performed using HEC-RAS. The FIRM Database consists of vector files and associated attributes produced in conjunction with the hardcopy FEMA FIRM. The published effective FIRM and FIRM Database 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 Standards for Flood Risk Analysis and Mapping. 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 the FIRM Database was also performed. Hydraulic analysis uses all valid existing flood elevation, survey, hydrologic analysis results, and other pertinent information for the study area. FEMA approved models are used to compute water surface elevations for required flood events. Computed water surface elevations and topographic data are used to delineate flood hazard boundaries. Roughness coefficients are carefully selected to represent the conditions along stream beds and banks. Hydraulics Data Capture submittals match the model output with respect to floodplain boundaries, cross sections, and water surface elevations and their precision. Floodplain boundaries and cross sections are not cartographically modified, and the data may not necessarily agree exactly with the published regulatory FIRM, FIRM Database, flood profiles, and Floodway Data Tables. Hydraulic analysis provides water surface elevations at different locations along the stream and for different flooding events. Hydraulic submittal includes key physical data used in the process, model parameters and model output. Data developed in surveying and hydrologic analysis are incorporated in hydraulic analysis. Results of hydraulic analysis are used to map Special Flood Hazard Area (SFHA) boundaries. Selection of model parameters (e.g., roughness coefficients, expansion and contraction coefficients, etc) is supported by additional information (e.g., landuse, aerial photo, etc). Model boundary conditions are carefully selected and justified. Modeled velocities are checked for potential erosion. The FIRM Database consists of vector files and associated attributes produced in conjunction with the hardcopy FEMA FIRM. The published effective FIRM and FIRM Database 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 Standards for Flood Risk Analysis and Mapping. 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 the FIRM Database was also performed. The FIRM Database consists of vector files and associated attributes produced in conjunction with the hardcopy FEMA FIRM. The published effective FIRM and FIRM Database 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 Standards for Flood Risk Analysis and Mapping. 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 the FIRM database was also performed. TWBD 20220521 Digital 20220521 Publication date STUDY1 Spatial and attribute information for floodplains, xs, subbasins, and waterlines. Hydraulic Study data development involves compiling survey and hydrologic analysis data, selecting an appropriate hydraulic model, preparing model input data, estimating model parameters, simulating water surface elevations for required recurrence intervals and delineating flood hazard boundaries. 20220521 State Plane Coordinate System 1983 4203 30.11666666666667 31.88333333333333 -100.3333333333333 29.66666666666667 2296583.333333333 9842500.0 coordinate pair 0.304800609601219 0.304800609601219 foot_us North American Datum of 1983 Geodetic Reference System 80 6378137 298.25 North American Vertical Datum of 1988 0.03 Feet Attribute values S_BFE Location and attributes for base flood elevation lines shown on the FIRM. FEMA FIRM Database Technical Reference (available at https://www.fema.gov/guidelines-and-standards-flood-risk-analysis-and-mapping and on the FEMA Risk MAP Knowledge Sharing Site). S_Fld_Haz_Ar Location and attributes for flood risk zones shown on the FIRM. FEMA FIRM Database Technical Reference (available at https://www.fema.gov/guidelines-and-standards-flood-risk-analysis-and-mapping and on the FEMA Risk MAP Knowledge Sharing Site). S_Gen_Struct A spatial dataset consisting of lines that depict the location of flood control structures shown on the flood profile and FIRM. FEMA FIRM Database Technical Reference (available at https://www.fema.gov/guidelines-and-standards-flood-risk-analysis-and-mapping and on the FEMA Risk MAP Knowledge Sharing Site). S_HWM A spatial dataset depicting the locations of high water marks from historic flooding used for model calibration. FEMA FIRM Database Technical Reference (available at https://www.fema.gov/guidelines-and-standards-flood-risk-analysis-and-mapping and on the FEMA Risk MAP Knowledge Sharing Site). S_Levee A spatial dataset consisting of lines that represent the centerlines of levees. FEMA FIRM Database Technical Reference (available at https://www.fema.gov/guidelines-and-standards-flood-risk-analysis-and-mapping and on the FEMA Risk MAP Knowledge Sharing Site). S_Profil_BasLn A spatial dataset consisting of lines showing the flow path used for floodplain modeling and mapping. FEMA FIRM Database Technical Reference (available at https://www.fema.gov/guidelines-and-standards-flood-risk-analysis-and-mapping and on the FEMA Risk MAP Knowledge Sharing Site). S_Riv_Mrk Location and attributes for river mile markers shown on the FIRM. FEMA FIRM Database Technical Reference (available at https://www.fema.gov/guidelines-and-standards-flood-risk-analysis-and-mapping and on the FEMA Risk MAP Knowledge Sharing Site). S_Stn_Start A spatial dataset consisting of points indicating the location of the reference point that was used as the origin for distance measurements along streams and rivers. FEMA FIRM Database Technical Reference (available at https://www.fema.gov/guidelines-and-standards-flood-risk-analysis-and-mapping and on the FEMA Risk MAP Knowledge Sharing Site). S_Submittal_Info A spatial dataset consisting of polygons depicting the extents of the studied area. FEMA FIRM Database Technical Reference (available at https://www.fema.gov/guidelines-and-standards-flood-risk-analysis-and-mapping and on the FEMA Risk MAP Knowledge Sharing Site). S_XS A spatial dataset consisting of lines showing the locations of cross sections used for computation of water-surface profiles for 1-D hydraulic models. FEMA FIRM Database Technical Reference (available at https://www.fema.gov/guidelines-and-standards-flood-risk-analysis-and-mapping and on the FEMA Risk MAP Knowledge Sharing Site). The Hydraulic submittal is made up of several data themes containing both spatial and attribute information. These data represent the extent of flooding and the water surface elevations for the subject area. The spatial data files and attribute tables include profile baselines, cross-sections, flood hazard boundaries, BFEs, manmade structures, and other data related to the NFIP. FEMA's FIRM Database Technical Reference contains a detailed description of the data themes and references to other relevant information. FEMA, Mapping Information Platform mailing

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Washington District of Columbia 20472 USA 1-877-336-2627 miphelp@riskmapcds.com FGDC Content Standards for Digital Geospatial Metadata FGDC-STD-001-1998 https://hazards.fema.gov http://www.epsg.org FEMA NFIP Metadata Content and Format Standard 2022052107544200TRUEfile://\\halff\Offices\Citrix\33000s\33606\003_Lampasas\Report\Lampasas\DigitalSubmit\480393_Hydraulics_metadataLocal Area Network