Description

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The United States is divided and sub-divided into successively smaller hydrologic units which are classified into four levels: regions, sub-regions, accounting units, and cataloging units. The hydrologic units are arranged or nested within each other, from the largest geographic area (regions) to the smallest geographic area (cataloging units). Each hydrologic unit is identified by a unique hydrologic unit code (HUC) consisting of two to eight digits based on the four levels of classification in the hydrologic unit system. The second level of classification divides the 21 regions into 221 subregions. A subregion includes the area drained by a river system, a reach of a river and its tributaries in that reach, a closed basin(s), or a group of streams forming a coastal drainage area. The third level of classification subdivides many of the subregions into accounting units. These 378 hydrologic accounting units are nested within, or can be equivalent to the subregions.Last Updated: September, 2016. GIS Metadata: http://www.ecy.wa.gov/services/gis/data/inlandWaters/nhd/wbd.htmFor more information, contact Anita Stohr, Washington State Department of Ecology, Hydrography Data Steward, anita.stohr@ecy.wa.gov or 360-407-7128.

Dataset Attributes

  • OBJECTID
    Number
  • TNMID
    Text
    {"value"=>"{FF7643F7-EC25-446F-8DCC-4D76866525EC}", "count"=>1} (), {"value"=>"{FC303906-EB8C-4FF4-BC53-674F3834CB59}", "count"=>1} (), {"value"=>"{FA3ABE26-8558-4F69-BE21-82B771206BE0}", "count"=>1} (), {"value"=>"{E601469F-456B-46E2-9AD8-49049D17B6C5}", "count"=>1} (), {"value"=>"{E4532A65-23A8-4B30-85A4-611546442D18}", "count"=>1} (), {"value"=>"{E3BBAA68-F450-4243-B541-D1C5A2BBCF0A}", "count"=>1} (), {"value"=>"{DB785059-BDAB-402A-B6B6-2575A82A8381}", "count"=>1} (), {"value"=>"{D9A2D051-43A7-4B38-9060-4DAF64A4E76D}", "count"=>1} (), {"value"=>"{D39695AF-09C0-43CB-A9FA-DC88920546C9}", "count"=>1} (), {"value"=>"{CA8A0205-5992-4977-8DEF-5A775ADCA72A}", "count"=>1} ()
  • LoadDate
    Date
    1358517314000 to 1458820869000
  • AreaSqKm
    Number
    442.17 to 12120.92
  • AreaAcres
    Number
    109262.15 to 2995141.3
  • GNIS_ID
    Number
  • Name
    Text
    {"value"=>"Willapa Bay", "count"=>1} (), {"value"=>"Wenatchee", "count"=>1} (), {"value"=>"Walla Walla", "count"=>1} (), {"value"=>"Upper Yakima", "count"=>1} (), {"value"=>"Upper Spokane", "count"=>1} (), {"value"=>"Upper Skagit", "count"=>1} (), {"value"=>"Upper Crab", "count"=>1} (), {"value"=>"Upper Cowlitz", "count"=>1} (), {"value"=>"Upper Columbia-Priest Rapids", "count"=>1} (), {"value"=>"Upper Columbia-Entiat", "count"=>1} ()
  • States
    Text
    {"value"=>"WA", "count"=>40} (), {"value"=>"CN,WA", "count"=>11} (), {"value"=>"ID,WA", "count"=>9} (), {"value"=>"OR,WA", "count"=>8} (), {"value"=>"CN,ID,WA", "count"=>2} (), {"value"=>"OR", "count"=>1} (), {"value"=>"ID,OR,WA", "count"=>1} ()
  • HUC8
    Text
    {"value"=>"17110021", "count"=>1} (), {"value"=>"17110020", "count"=>1} (), {"value"=>"17110019", "count"=>1} (), {"value"=>"17110018", "count"=>1} (), {"value"=>"17110017", "count"=>1} (), {"value"=>"17110016", "count"=>1} (), {"value"=>"17110015", "count"=>1} (), {"value"=>"17110014", "count"=>1} (), {"value"=>"17110013", "count"=>1} (), {"value"=>"17110012", "count"=>1} ()

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