• Lewis Creek Basin Drainage Details

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    Lake Washington Watershed (WRIA 8) / State Stream #08-0162

    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.

    BasinFactSheet_Lewis Creek.jpg

    Please check out the PDF fact sheet version

    Land Characteristics

    Basin Area
    1,424 Total Acres
    City Area
    4.7%
    Drainage Jurisdiction(s)
    Bellevue: 70.1%
    Beaux Arts: 0.0%
    Clyde Hill: 0.0%
    Issaquah: 24.6%
    King County: 5.0%
    Kirkland: 0.0%
    Medina: 0.0%
    Newcastle: 0.0%
    Redmond: 0.0%
    Renton: 0.0%
    Lowest Elevation
    31 Ft
    Highest Elevation
    1,423 Ft
    Total Length of Open Channel
    10.0 Miles
    Total Length of Storm Drainage Pipes:
    23.5 Miles

    Salmon Present in the Basin

    • Chinook*+
    • Coho+
    • Kokanee+
    • Sockeye
    • Rainbow & Cutthroat Trout
    • Steelhead (Lake only)

    * 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)
    7,542
    % of all Basins
    5.0%
    Basin Population Density
    3,389 People per Square Mile

    Land Use

    Entire Basin Within Bellevue
    Public Right of Way 14.4% 39.3%
    Commercial/Office 0.7% 0.7%
    Industrial 0.0% 0.0%
    Institutional/Government 1.6% 1.6%
    Mixed Use/Misc 6.3% 2.4%
    Multi-Family 3.5% 2.4%
    Open Space/Park 19.0% 16.2%
    Single Family Residential 41.6% 31.4%
    Unknown 13.0% 5.9%

    Land Cover

    Entire Basin Within Bellevue
    Impervious 29.4% 30.6%
    Tree Canopy 52.2% 49.8%
    Impervious in 100 Ft Stream Buffer 17.7% 15.1%
    Tree Canopy in 100 Ft Stream Buffer 69.5% 61.0%