Image Title  Abstract Category Last Updated
    all_streams_bes_pdx Hydro 10/02/13 09:30 AM
    FEMA Biological Opinion Impact Areas Potential areas impacted by FEMA's Biological Opinion (BioP) related to streams with salmonid habitat. This is an interim mapping established by RPA 2 and does not represent the full scope of area impacted by the Biological Opinion. Hydro 05/04/20 05:01 PM
    Portland Flood 1894 Shows area of 1894 Flood Hydro 05/20/24 02:07 PM
    Regional Waterbodies Regional streams, rivers, lakes, ponds and other surface water features. Only features large enough to be visible on aerial photographs or delineated from LiDAR data are mapped (more detailed stream information is available as centerlines). This data can be viewed online at www.PortlandMaps.com. Hydro 08/16/23 10:24 AM
    River Bank Treatments Inventory of City of Portland Willamette and Columbia River bank treatments (a.k.a., bank types or habitats). Hydro 08/09/12 02:50 PM
    River Bathymetry (1888) Willamette River 1888 and 1895 depth polygons (from Willamette Falls to the Columbia) derived from TIN model of river bathymetry. Original reference points and breaklines digitized and interpolated by the City of Portland, Bureau of Planning, from United States Coast & Geodetic Survey 1888 Columbia River chart (Fales Landing to Portland) and U.S. Army Corps of Engineers 1895 surveys of the Upper Willamette (Sheets 14 and 15). NOTE: Other data such as streams, wetlands, and off-channel waterbodies were also digitized from the historic Willamette River maps. Please contact the City of Portland, Bureau of Planning using the contact information below if you are interested in aquiring this information. Hydro 01/01/00 12:00 AM
    River Bathymetry (2001) Hydro 01/01/00 12:00 AM
    River Beaches River beaches in the Portland area. Hydro 08/09/12 02:50 PM
    River Depth Contours Willamette 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. Hydro 07/22/20 05:36 PM
    river_miles_pdx Hydro 01/01/00 12:00 AM