100 Year Floodplain Map Oregon. Polk County Flood Zone Map Maping Resources The City of Oregon City includes the 1996 flood inundation line in its floodplain determination Last Modified: July 5, 2023 (0 ratings, 0 comments, 0 views)
100 Year Flood Plain Map from www.waterresources.saccounty.net
Any place with a 1% chance or higher chance of experiencing a flood each year is considered high risk and is designated a Special Flood Hazard Area (SFHA). The GIS mapping tool has the 100-year and 500-year flood information as separate selectable layers.
100 Year Flood Plain Map
The 100 Year Floodplain map depicts the FEMA 100-year flood zone boundary (2008 version), which is the area with a 1-percent annual chance of flooding, as well as the extent of the inundation area from 1996 flood. The City of Oregon City includes the 1996 flood inundation line in its floodplain determination The FEMA flood hazard is defined as the area that will be inundated by the flood event having a 1-percent chance of being equaled or exceeded in any given year; this is also referred to as the base flood, High Risk Area, or the Special Flood Hazard Area.
Flood Maps. You may choose from these options to select a specific layer on the map page There is no area that is without flood risk, but some areas have a lower or moderate risk
IFC Completes Statewide Floodplain Maps IIHR—Hydroscience & Engineering. View Federal Emergency Management Agency (FEMA) Flood Insurance Rate Maps (FIRMs) for Portland and the City's Composite February 1996 Flood Inundation Area Map. Those areas have at least a one-in-four chance of flooding during a 30-year mortgage.