City of Portland, OregonWillamette and Columbia River depth contours for the City of Portland area. River depths are from ordinary high water (OHW), as measured by the U.S. Army Corps of Engineers in 2004. --Additional Information: Category: Hyrdo Purpose: For representing depth from ordinary high water in the Willamette and Columbia rivers. Update Frequency: None planned -- Metadata Link: https://www.portlandmaps.com/metadata/index.cfm?&action=DisplayLayer&LayerID=53397ArcGIS DynamicMapLayerhttps://hub.arcgis.com/datasets/714855156eda48f498edeed01d517d7f_205engPortlandMaps Open DataPublicRiver Depth Contours [Oregon--Portland]Web servicesOregon--PortlandOregonLast Modified: 2023-05-31