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    Image Title  Abstract Category Last Updated
    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 10/19/16 02:49 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 12/26/18 08:55 PM
    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 Willamette and Columbia River depths for the City of Portland area. River depths are from ordinary high water (OHW), as surveyed by the U.S. Army Corps of Engineers in 2004. Hydro
    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 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 12/26/18 07:04 PM
    Stream Centerlines Regional stream centerline dataset. Reference sources include 2004 through 2007 LiDAR data, aerial photos, and the mapped stormwater collection system. This data can be viewed online at www.PortlandMaps.com. Hydro 05/21/19 02:54 PM
    Top of Bank Lines representing top-of-bank of major rivers and streams in the Portland region (where mapped). River top of bank derived from 2014 LiDAR using an automated mapping method explained in the process steps below. River top of bank will be completely mapped by early 2017. Columbia Slough top of bank derived from visual interpretation of aerial photos and 2007 LiDAR data. Mapping will be expanded over time using LiDAR data and field surveys. Hydro 04/09/19 02:47 PM
    Top of Bank (Adopted) Lines representing City Council adopted (regulatory) top-of-bank of major rivers and streams in the Portland region. Mapping source of lines varies. Hydro 04/09/19 02:47 PM
       
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