City of Portland, OregonThe map is a combination of the February 1996 Flood Inundation Area, shown on the Metro Flood Management Area map and the results of new hydraulic modeling on the Lower Willamette River applied to the Central and South Reaches of the river. For more information see: https://www.portland.gov/bds/floodplain-development-regulation-updates. --- Additional Information - Category: Hazard Purpose: Regulatory layer for Title 24.50 Flood Hazard Areas. Replaces Metro Title 3 1996 Flood Inundation Area referenced prior to March 1, 2024. Update Frequency: As Needed --- Metadata Link - https://www.portlandmaps.com/metadata/index.cfm?&action=DisplayLayer&LayerID=61134ArcGIS DynamicMapLayerhttps://hub.arcgis.com/datasets/5023a99937154026bf19243fcc76b273_1416engPortlandMaps Open DataPublicTitle 24 Composite 1996 Flood Hazard Area [Oregon--Portland]Web servicesOregon--PortlandOregon1996