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Estimated Base Level Elevation (BLE) data, specifically the flood area dataset which includes Floodway, 1% and 0.2% annual flood areas for the state of Texas. This is a consolidated dataset of approximately 200 watersheds in the Texas region. Data was downloaded from the USGS/FEMA BLE Viewer (https://webapps.usgs.gov/infrm/estbfe/), unzipped, the Flood Areas for each watershed were merged together then a Delete Identical was ran, as well as Projection to NAD 83. This dataset is clipped to Pape-Dawson's Web Map Regions layer and includes an attribute for the web map region for filtering. A full dataset can be referenced here: R:\GISdata\State_Wide\TWDB\BLE\TWDB_StatewideBLE.gdb For questions on processing, please contact Sara Dunlap (SDunlap@pape-dawson.com). |
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Estimated Base Level Elevation (BLE) data, specifically the flood area dataset which includes Floodway, 1% and 0.2% annual flood areas for the state of Texas. This is a consolidated dataset of approximately 200 watersheds in the Texas region. Data was downloaded from the USGS/FEMA BLE Viewer (https://webapps.usgs.gov/infrm/estbfe/), unzipped, the Flood Areas for each watershed were merged together then a Delete Identical was ran, as well as Projection to NAD 83. This dataset is clipped to Pape-Dawson's Web Map Regions layer and includes an attribute for the web map region for filtering. A full dataset can be referenced here: R:\GISdata\State_Wide\TWDB\BLE\TWDB_StatewideBLE.gdb For questions on processing, please contact Sara Dunlap (SDunlap@pape-dawson.com). |
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TWDB, FEMA, USGS, 2026 |
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5000 |
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[] |
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<DIV STYLE="text-align:Left;"><DIV><DIV><P><SPAN>The Flood Risk Information Report produced by the Estimated Base Flood Elevation (estBFE) Viewer includes estimated Base Flood Elevation (BFE) and approximate flood depths determined from gridded datasets constructed from engineering flood models. It also includes area downloads for HEC-RAS (Hydrologic Engineering Center’s River Analysis System) modeling. HEC-RAS software allows the user to perform one-dimensional steady flow, one and two-dimensional unsteady flow calculations, sediment transport/mobile bed computations, and water temperature/water quality modeling. (More information)</SPAN></P><P><SPAN>For downloadable layers: At the link above, select Map Layers, then Data Availability (BLE), select “On” for status & data download. Click an area on the map to view downloadable datasets.</SPAN></P><P><SPAN>Statewide BLE data is expected to be available on the BLE website for download by summer 2025. To see the current progress of BLE development throughout the state and the status for a given watershed, please see the BLE Status Dashboard here: BLE Status Dashboard (arcgis.com). For BLE data inquiries, please contact BLE@twdb.texas.gov.</SPAN></P></DIV></DIV></DIV> |
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| title:
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PDO.TWDB_BFE_FloodArea |
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| tags:
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["FEMA","USGS","TWDB","BFE","BLE","Flood Area","Flood Risk","Environmental"] |
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en-US |
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50000 |
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