The Vermont Flood Ready Atlas is an online-map tool that can help you identify critical facilities, transportation services and buildings in your community that are at risk of damage from flooding. The Atlas can also help you identify local watersheds and the extent of natural flood protection provided by forests, wetlands, floodplains and river corridors.The Vermont Flood Ready Atlas allows you to easily find data about your community and watershed. Nonetheless, you may want to refer to theTips and Tricks section below to get your bearings. If you have any questions, ideas or problems – let us know! Thank you.

The entire Vermont extent of the National Flood Hazard Layer (NFHL) as acquired 12/15/15 from the FEMA Map Service Center msc.fema.gov upon publication 12/2/2015 and converted to VSP.The FEMA DFIRM NFHL database compiles all available officially-digitized Digital Flood Insurance Rate Maps. This extract from the FEMA Map Service Center includes all of such data in Vermont including counties and a few municipalities. This data includes the most recent map update for Bennington County effective 12/2/2015.DFIRM - Letter of Map Revision (LOMR) DFIRM X-Sections DFIRM Floodways Special Flood Hazard Areas (All Available)

The Floodplain Management section of the VT Rivers Program works with the Federal Emergency Management Agency (FEMA) to oversee the National Flood Insurance Program (NFIP) in Vermont. The NFIP is a voluntary program administered at the community level. Participating communities agree to manage floodplain development using building and land-use regulations. In return, residents have the ability to purchase flood insurance, apply for federally insured loans (such as mortgages), and receive flood disaster assistance. While NFIP designated floodplains provide a useful management tool, they do not necessarily show the full extent of flood risk along Vermont streams and rivers. We encourage towns to be proactive in managing floodplains and to adopt regulations that go beyond the minimum NFIP requirements as well as consider the addition of river corridors to their flood hazard management regulations and approach.

(Link to Metadata) (Link to data release page) This Topographically-defined Floodplain dataset is a high-resolution raster that communicates the extent and frequency of flood inundation along rivers that drain 2 square-miles or more in the Lake Champlain Basin, Vermont. This dataset represents the lateral extents of flooding for storms of recurrence intervals ranging from 2 to 500 years. It includes eight modeled storm sizes (2, 5, 10, 25, 50, 100, 200, and 500 year peak floods) informed by regional regression analyses built from Vermont watershed characteristics and the historical hydrology of the region. The Floodplain dataset represents the flood inundation extents as they are topographically defined at the time of the most recent LiDAR data collection, which varies from 2013 to 2017.Because of simplifications made to represent hydraulic processes in the modeling approach and uncertainties and errors in large scale model parameterization (e.g., flood peak discharges at ungauged reaches, roughness values), there are limitations to its uses.This floodplain model is intended for planning and research use by government, academic, commercial and non-governmental agencies; it is NOT a substitute for FEMA Flood Insurance Rate Maps and is not intended for regulatory use.

Flood Hazard Overlay data for the Town of Hinesburg, Vermont. Data corresponds to the zoning regulations amended May 10, 2023. Refer to the Hinesburg website for more detail.

Zoning Districts found under separate file.

This data includes the Flood Hazard Area Overlay District for Middlesex, Vermont as per Land Use and Development Regulations for the town adopted 1/10/2017. Flood Hazard Area Overlay is based on National Flood Insurance Program (NFIP) data FEMA 2013 and represent the Special Flood Hazard Area (100 year floodplain).

This data included the Flood Hazard Overlay District for Warren, Vermont which is included in the Land Use and Development Regulations amended and adopted March 25, 2008. The Flood Hazard Overlay District includes areas identified as the Special Flood Hazard Area (SFHA, i.e., 100 year floodplain) federal National Flood Insurance Program maps. It's purpose is for zoning and planning and is to promote public health, safety, and welfare by preventing or minimizing damages and hazards due to flooding. This data was derived from 2013 FEMA NFIP flood data.

Adopted: 8/17/2015. Overlay district GIS data layer. Models a municipality's overlay district and related information.

Flood Maps including TS Irene for the Winooski in Waterbury

This data contains the Flood Hazard Area Overlay District in Waitsfield, Vermont as part of the zoning bylaws adopted in 2016. This overlay district consists of the areas designated as the Special Flood Hazard Area (SFHA, i.e., 100 year floodplain) through the FEMA 2013 data, or the most recent National Flood Insurance Program (NFIP) maps. The purpose of the overlay if for zoning and planning and is to promote public health, safety and welfare, prevent increases in flooding, minimize flood losses, manage all SFHA areas in conformance with the adopted town and hazard mitigation plans, and to ensure Waitsfield can receive federal disaster recovery funds through the NFIP.

This data includes the Special Flood Hazard Area Overlay for the Town of Northfield as part of their Bylaws for Land Use Regulations dated December 21,2017. The overlay represents the 100 year floodplain and floodway and was derived from National Flood Insurance Program (NFIP) FEMA 2013 data.

Data identifies the Inundation Hazard Areas (FEMA Special Flood Hazard Areas) for the City of Winooski, VT. Refer to Appendix A of the City of Winooski Unified Land Use and Development Regulations amended August 8, 2022.Zoning and Form Base Code data available under separate files.

The entire Vermont extent of the National Flood Hazard Layer (NFHL) as acquired 12/15/15 from the FEMA Map Service Center msc.fema.gov upon publication 12/2/2015 and converted to VSP.The FEMA DFIRM NFHL database compiles all available officially-digitized Digital Flood Insurance Rate Maps. This extract from the FEMA Map Service Center includes all of such data in Vermont including counties and a few municipalities. This data includes the most recent map update for Bennington County effective 12/2/2015.DFIRM - Letter of Map Revision (LOMR) DFIRM X-Sections DFIRM Floodways Special Flood Hazard Areas (All Available)

(Link to Metadata) The 2022 Topographically-defined Floodplains for Lake Champlain Basin were generated from high-resolution topographic data along rivers draining greater than 2 square miles. They are for planning and research use by government, academic, commercial and non-governmental agencies; they are not a substitute for FEMA Flood Insurance Rate Maps and they are not intended for regulatory use. The intent was to generate greater geospatial coverage of floodplains in the basin to support restoration and conservation project planning for improved water quality, enhanced flood and climate resilience, and expanded habitat and ecosystem functions. The model (raster) is served as an ArcGIS Tile Layer and as individual HUC-based .tiff files (downloadable via https://maps.vcgi.vermont.gov/opendata/tileselect_opendata.html?IndexLayerName=Index_EmergencyFlood_LCBINUNDATION&FolderURL=https://s3.us-east-2.amazonaws.com/vtopendata-prd/index.html#Water/_Packaged_Zips/EmergencyFlood_LCBINUNDATION/HUC8_Zipped/&cdownload=-1&InputLayerName=EmergencyFlood_LCBINUNDATION&DownloadFields=DOWNLOAD_G). A companion vector layer (Reaches, available via https://geodata.vermont.gov/datasets/2ac04b00651d4f399c54160643e5b53e_0/explore) is included with this dataset to reflect various parameters, notices, and warnings associated with the model run at each reach. The ArcGIS Tile Layer is served in the WGS 1984 Web Mercator Auxiliary Sphere spatial reference; the .tiff files and Reaches are in the NAD 1983 VT State Plane Meters spatial reference. Dataset is representative of ground conditions at the time of the most recent State of Vermont LiDAR flights; 2013-2017 Additional information is available in report located at https://vcgi.vermont.gov/sites/vcgiupdate/files/doc_library/HAND-based%20Floodplain%20Maps%20Documentation.pdf .

Flood Hazard Overlay District for Milton, Vermont. Data corresponds to the regulations amended by the Selectboard on June 7, 2021. Please see the Milton Unified Development Regulations page for the adopted regulations and maps.Also see Milton Zoning for the complete Unified Development Regulations data. Zoning Districts found under separate file.

For a thorough discussion of the purpose, design and management of the Vermont River Corridors dataset, please see the "Vermont DEC Flood Hazard Area and River Corridor Protection Procedures December 5, 2014" http://www.vtwaterquality.org/rivers/docs/FHARCP_12.5.14.pdf . River corridors encompass an area around and adjacent to the present channel where fluvial erosion, channel evolution and down-valley meander migration are most likely to occur. River corridor widths are calculated to represent the narrowest band of valley bottom and riparian land necessary to accommodate the least erosive channel and floodplain geometry (i.e. equilibrium conditions) that would be created and maintained naturally within a given valley setting. River corridors are developed to facilitate ANR’s responsibilities in providing municipalities, regional planning commissions, and Act 250 District Commissions with technical assistance and information concerning river sensitivity and fluvial erosion hazards. Vermont river corridors include areas where active, potentially hazardous river erosion and deposition process have occurred or are likely to occur. These delineations do NOT indicate that areas outside river corridors, particularly those immediately abutting the river or river corridor are free from fluvial erosion hazards.This dataset is part of the “applicable maps” used in conjunction with other best available stream geomorphic data to implement both the Flood Hazard Area and River Corridor “Rule” and “Protection Procedure.” The data will be updated over time as described in the Procedure. The date of the version posted on the Vermont Natural Resource Atlas indicates the most recent update. Users should cite the Creation Date for the version. Data processing was done using ArcGIS 10.x, Spatial Analyst, and Arc Hydro Tools 2.0. Source and digitized data included VT Meander Centerlines (MCLs), VT Reach Break points, VT Hydrography streams, VT 10-meter DEM, VTHYDRODEM, HUC 8 Basins, VT Roads and Railroads, field-verified Valley Walls and Stream Geomorphic Assessment datasets. This 2019 version is a hybrid of Phase I and II levels of detail. River Corridor polygons are divided by subwatershed breaks and by SGA reach/segment breaks. Attributes include SGAT ID, Stream Name, Drainage Area in square miles, Bankfull width in feet, Channel Multiplier, DMS Channel Multiplier, DMS Channel Width, Erosion Power/Risk and Deposition Power/Risk. Major derived datasets include raster and vector valley walls, catchments per stream reach, variable-width MCL buffers, and the final River Corridor. A Frequently-Asked Questions page is available at: http://floodready.vermont.gov/rcfaqThis package also includes streams that have a drainage area between .25 and 2 square miles. Streams were mapped by filtering drainage areas from the VHD accumulation grids. They were then extracted from the grid and vectorized. Linework is for reference only, as it does not match the VHD perfectly. Small streams are given a simple 50-foot setback from top of bank in lieu of a mapped River Corridor.

This data includes the Flood Hazard Overlay District for the Town of Duxbury, Vermont. The district includes the Special Flood Hazard Area (100 year floodplain) based on NFIP FEMA 2013 data and regulations that are applied to this area are outlined in the Duxbury Zoning Ordinance amended 1/31/2011.

This data comprises the zoning overlay districts used on the official Town of Bennington Vermont Zoning Map. These overlay districts include the Flood Hazard Overlay, River Corridor (Fluvial Erosion Hazard) Overlay, and Shoreland Protection Overlay.

Overlay districts used to produce the official Stamford Vermont Zoning Map adopted on 10/15/2015. These overlay districts include flood hazard areas and river corridors.

This data is used to produce the official Woodford Vermont Zoning Map adopted on November 18,2015. It includes the flood hazard overlay district.