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City of Bellevue, WA Utilities
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  1. Home
  2. City Government
  3. Departments
  4. Utilities
  5. Conservation and the Environment
  6. Drainage Basins
  7. Combined Drainage Basins
  8. Greater Kelsey Basin

    Combined Drainage Basins

    • City of Bellevue
    • Greater Coal Creek Basin
    • Greater Kelsey Basin
    • North Sammamish Basins
    • Small Lake Washington Basins

    Greater Kelsey Basin

    Header Image
    Conservation Banner 6-14-17.jpg

    Lake Washington Watershed (WRIA 8)

    Updated: July 2017

    The City of Bellevue does not guarantee that the information on this map is accurate or complete. This data is provided on an "as is" basis and disclaims all warranties.

    Greater Kelsey.jpg

    Please check out the PDF fact sheet version

    Land Characteristics

    Basin Area
    8,735 Total Acres
    City Area
    38.5%
    Drainage Jurisdiction(s)
    Bellevue: 94.6%
    Beaux Arts: 0.0%
    Clyde Hill: 0.0%
    Issaquah: 0.0%
    King County: 2.0%
    Kirkland: 0.3%
    Medina: 0.0%
    Newcastle: 0.0%
    Redmond: 3.1%
    Renton: 0.0%
    Lowest Elevation
    20 Ft
    Highest Elevation
    1,010 Ft
    Total Length of Open Channel
    26.5 Miles
    Total Length of Storm Drainage Pipes:
    162.7 Miles

    Salmon Present in the Basin

    • Chinook*+
    • Sockeye
    • Rainbow & Cutthroat Trout
    • Chum
    • Steelhead
    • Coho+

    * Listed Federal Endangered Species
    + City Species of Local Importance (Bellevue Land Use Code 20.25H.150A)

    Population

    The population density in Bellevue ranges from 1,344 to 9,851 people per square mile.

    Basin Population (2016)
    53,253
    % of all Basins
    35.3%
    Basin Population Density
    1,508 People per Square Mile

    Land Use

      Entire Basin Within Bellevue
    Public Right of Way 15.1% 15.2%
    Commercial/Office 11.8% 11.1%
    Industrial 1.6% 1.7%
    Institutional/Government 6.4% 6.8%
    Mixed Use/Misc 6.0% 5.6%
    Multi-Family 4.7% 4.9%
    Open Space/Park 12.3% 10.9%
    Single Family Residential 35.2% 36.9%
    Unknown 6.8% 6.9%

    Land Cover

      Entire Basin Within Bellevue
    Impervious 42.7% 50.6%
    Tree Canopy 38.3% 37.7%
    Impervious in 100 Ft Stream Buffer 23.3% 23.3%
    Tree Canopy in 100 Ft Stream Buffer 56.1% 56.1%

    City of Bellevue sealCity of Bellevue, WA

    • 450 110th Avenue NE
    • Bellevue, WA 98004
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    • Español (Spanish): 1-844-590-8948
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