Description: The effective FEMA data are the most recently updated data for the state and are used for regulatory purposes.
Cross-Sections: “These lines usually represent the locations of channel surveys performed for input into the hydraulic model used to calculate flood elevations” (FEMA, 2013)
Description: The effective FEMA data are the most recently updated data for the state and are used for regulatory purposes.
Base Flood Elevations: “This layer indicates the computed elevation to which floodwater is anticipated to rise during the base flood. The Base Flood Elevations (BFE) is the regulatory requirement for the elevation or floodproofing of structures. The relationship between the BFE and a structure's elevation determines the flood insurance premium.” (FEMA, 2013)
Color: [0, 0, 0, 255] Background Color: N/A Outline Color: N/A Vertical Alignment: bottom Horizontal Alignment: center Right to Left: false Angle: 0 XOffset: 0 YOffset: 0 Size: 12 Font Family: Arial Font Style: normal Font Weight: normal Font Decoration: none
Description: The effective FEMA data are the most recently updated data for the state and are used for regulatory purposes.
Floodway: “A "Regulatory Floodway" means the channel of a river or other watercourse and the adjacent land areas that must be reserved in order to discharge the base flood without cumulatively increasing the water surface elevation more than a designated height. Communities must regulate development in these floodways to ensure that there are no increases in upstream flood elevations. For streams and other watercourses where FEMA has provided Base Flood Elevations (BFEs), but no floodway has been designated, the community must review floodplain development on a case-by-case basis to ensure that increases in water surface elevations do not occur, or identify the need to adopt a floodway if adequate information is available” (FEMA, 2016).
Description: The effective FEMA data are the most recently updated data for the state and are used for regulatory purposes.
100 Year Flood (1% Annual Chance Flood, Base Flood, Special Flood Hazard Area (SFHA)): “The flood having a 1-percent chance of being equaled or exceeded in any given year; also known as the base flood The 1-percent annual chance flood, which is the standard used by most Federal and state agencies, is used by the National Flood Insurance Program (NFIP) as the standard for floodplain management and to determine the need for flood insurance. A structure located within a special flood hazard area (SFHA) shown on an NFIP map has a 26 percent chance of suffering flood damage during the term of a 30-year mortgage.” (Federal Emergency Management Agency (FEMA), 2003).
Description: The effective FEMA data are the most recently updated data for the state and are used for regulatory purposes.
500 Year Flood (0.2% Annual Chance Flood): “This is the boundary of the flood that has a 0.2-percent chance of being equaled or exceeded in any given year. Officially termed the 0.2-percent annual chance floodplain “In moderate- to low-risk areas, the risk of flooding is reduced but not completely removed. These areas submit more than 20 percent of National Flood Insurance Program claims and receive one-third of Federal disaster assistance for flooding. Flood insurance isn't federally required in moderate- to low-risk areas, but it is recommended for all property owners and renters. They are shown on flood maps as zones beginning with the letters 'B', 'C' or 'X' (or a shaded X)” (FloodSmart.gov, 2016)”.
Description: Represents the SFHA that is currently regulatory and in effect (effective); all of western Oregon (except Tillamook and Washington) and Deschutes, Morrow, and Umatilla.
Metadata: http://navigator.state.or.us/ArcGIS/rest/services/Framework/Haz_GeneralMap/MapServer/2
Download: http://oe.oregonexplorer.info/ExternalContent/SpatialDataForDownLoad/haz_or_flood_2012.zip
Description: FEMA is currently updating data for several counties and project areas, which is shown as preliminary data. Preliminary data cannot be used for regulatory purposes.
Cross-Sections: “These lines usually represent the locations of channel surveys performed for input into the hydraulic model used to calculate flood elevations” (FEMA, 2013)
Description: FEMA is currently updating data for several counties and project areas, which is shown as preliminary data. Preliminary data cannot be used for regulatory purposes.
Base Flood Elevations: “This layer indicates the computed elevation to which floodwater is anticipated to rise during the base flood. The Base Flood Elevations (BFE) is the regulatory requirement for the elevation or floodproofing of structures. The relationship between the BFE and a structure's elevation determines the flood insurance premium.” (FEMA, 2013)
Color: [0, 0, 0, 255] Background Color: N/A Outline Color: N/A Vertical Alignment: bottom Horizontal Alignment: center Right to Left: false Angle: 0 XOffset: 0 YOffset: 0 Size: 12 Font Family: Arial Font Style: normal Font Weight: normal Font Decoration: none
Description: FEMA is currently updating data for several counties and project areas, which is shown as preliminary data. Preliminary data cannot be used for regulatory purposes.
Floodway: “A "Regulatory Floodway" means the channel of a river or other watercourse and the adjacent land areas that must be reserved in order to discharge the base flood without cumulatively increasing the water surface elevation more than a designated height. Communities must regulate development in these floodways to ensure that there are no increases in upstream flood elevations. For streams and other watercourses where FEMA has provided Base Flood Elevations (BFEs), but no floodway has been designated, the community must review floodplain development on a case-by-case basis to ensure that increases in water surface elevations do not occur, or identify the need to adopt a floodway if adequate information is available” (FEMA, 2016).
Description: FEMA is currently updating data for several counties and project areas, which is shown as preliminary data. Preliminary data cannot be used for regulatory purposes.
100 Year Flood (1% Annual Chance Flood, Base Flood, Special Flood Hazard Area (SFHA)): “The flood having a 1-percent chance of being equaled or exceeded in any given year; also known as the base flood The 1-percent annual chance flood, which is the standard used by most Federal and state agencies, is used by the National Flood Insurance Program (NFIP) as the standard for floodplain management and to determine the need for flood insurance. A structure located within a special flood hazard area (SFHA) shown on an NFIP map has a 26 percent chance of suffering flood damage during the term of a 30-year mortgage.” (Federal Emergency Management Agency (FEMA), 2003).
Description: FEMA is currently updating data for several counties and project areas, which is shown as preliminary data. Preliminary data cannot be used for regulatory purposes.
500 Year Flood (0.2% Annual Chance Flood): “This is the boundary of the flood that has a 0.2-percent chance of being equaled or exceeded in any given year. Officially termed the 0.2-percent annual chance floodplain “In moderate- to low-risk areas, the risk of flooding is reduced but not completely removed. These areas submit more than 20 percent of National Flood Insurance Program claims and receive one-third of Federal disaster assistance for flooding. Flood insurance isn't federally required in moderate- to low-risk areas, but it is recommended for all property owners and renters. They are shown on flood maps as zones beginning with the letters 'B', 'C' or 'X' (or a shaded X)” (FloodSmart.gov, 2016)”.
Description: The State digitized data were created by DLCD. They are a digital representation of flood zones currently shown on FEMA paper maps with minor modifications added by DLCD in order to more accurately reflect current topography and stream reaches. This data cannot be used for regulatory purposes.
Base Flood Elevations: “This layer indicates the computed elevation to which floodwater is anticipated to rise during the base flood. The Base Flood Elevations (BFE) is the regulatory requirement for the elevation or floodproofing of structures. The relationship between the BFE and a structure's elevation determines the flood insurance premium.” (FEMA, 2013)
Color: [0, 0, 0, 255] Background Color: N/A Outline Color: N/A Vertical Alignment: bottom Horizontal Alignment: center Right to Left: false Angle: 0 XOffset: 0 YOffset: 0 Size: 12 Font Family: Arial Font Style: normal Font Weight: normal Font Decoration: none
Description: The State digitized data were created by DLCD. They are a digital representation of flood zones currently shown on FEMA paper maps with minor modifications added by DLCD in order to more accurately reflect current topography and stream reaches. This data cannot be used for regulatory purposes.
Cross-Sections: “These lines usually represent the locations of channel surveys performed for input into the hydraulic model used to calculate flood elevations” (FEMA, 2013)
Description: The State digitized data were created by DLCD. They are a digital representation of flood zones currently shown on FEMA paper maps with minor modifications added by DLCD in order to more accurately reflect current topography and stream reaches. This data cannot be used for regulatory purposes.
Floodway: “A "Regulatory Floodway" means the channel of a river or other watercourse and the adjacent land areas that must be reserved in order to discharge the base flood without cumulatively increasing the water surface elevation more than a designated height. Communities must regulate development in these floodways to ensure that there are no increases in upstream flood elevations. For streams and other watercourses where FEMA has provided Base Flood Elevations (BFEs), but no floodway has been designated, the community must review floodplain development on a case-by-case basis to ensure that increases in water surface elevations do not occur, or identify the need to adopt a floodway if adequate information is available” (FEMA, 2016).
Description: The State digitized data were created by DLCD. They are a digital representation of flood zones currently shown on FEMA paper maps with minor modifications added by DLCD in order to more accurately reflect current topography and stream reaches. This data cannot be used for regulatory purposes.
100 Year Flood (1% Annual Chance Flood, Base Flood, Special Flood Hazard Area (SFHA)): “The flood having a 1-percent chance of being equaled or exceeded in any given year; also known as the base flood The 1-percent annual chance flood, which is the standard used by most Federal and state agencies, is used by the National Flood Insurance Program (NFIP) as the standard for floodplain management and to determine the need for flood insurance. A structure located within a special flood hazard area (SFHA) shown on an NFIP map has a 26 percent chance of suffering flood damage during the term of a 30-year mortgage.” (Federal Emergency Management Agency (FEMA), 2003).
Description: This layer comprises the index of the available FEMA flood panels for download. Created by the Department of Land Conservation and Development for use in this tool. This layer includes both preliminary, effective and Q3 panels.
Metadata: http://oe.oregonexplorer.info/metadata/pln_or_fema_flood_panels.htm
Download
http://oregonexplorer.info/ExternalContent/SpatialDataForDownload/pln_or_fema_flood_panels.zip
Description: Historic Floods of 1996, 1964, 1943, and 1861 in the Willamette River Basin.
Metadata
http://spatialdata.oregonexplorer.info/geoportal/details;id=17477b65032f4e7885d4ad444396348d
Download
http://oregonexplorer.info/ExternalContent/SpatialDataForDownload/WRB_all_floods.zip
Description: Historic Floods of 1996, 1964, 1943, and 1861 in the Willamette River Basin.
Metadata
http://spatialdata.oregonexplorer.info/geoportal/details;id=17477b65032f4e7885d4ad444396348d
Download
http://oregonexplorer.info/ExternalContent/SpatialDataForDownload/WRB_all_floods.zip
Description: Historic Floods of 1996, 1964, 1943, and 1861 in the Willamette River Basin.
Metadata: http://spatialdata.oregonexplorer.info/geoportal/details;id=17477b65032f4e7885d4ad444396348d
Download
http://oregonexplorer.info/ExternalContent/SpatialDataForDownload/WRB_all_floods.zip
Description: Historic Floods of 1996, 1964, 1943, and 1861 in the Willamette River Basin.
Metadata: http://spatialdata.oregonexplorer.info/geoportal/details;id=17477b65032f4e7885d4ad444396348d
Download
http://oregonexplorer.info/ExternalContent/SpatialDataForDownload/WRB_all_floods.zip
Name: Statewide Flood Hazard Database Observed Inundation High Water Marks (2015)
Display Field: event_name
Type: Feature Layer
Geometry Type: esriGeometryPoint
Description: The HWM_POINTS feature class is a compilation of high water marks from flood events for the state of Oregon.
Service Item Id: 41355169a45045cea66b5e903fb64c78
Copyright Text: The Statewide Flood Hazard Database for Oregon was funded by the Oregon Geospatial Enterprise Office. It is an official Hazards Framework Implementation Team (FIT) theme.