• Rosemont Area Drainage Details

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    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.

    Rosemont basin map

    Please check out the PDF fact sheet version

    Land Characteristics

    Basin Area
    152 Total Acres
    City Area
    0.7%
    Drainage Jurisdiction(s)
    Bellevue: 100.0%
    Beaux Arts: 0.0%
    Clyde Hill: 0.0%
    Issaquah: 0.0%
    King County: 0.0%
    Kirkland: 0.0%
    Medina: 0.0%
    Newcastle: 0.0%
    Redmond: 0.0%
    Renton: 0.0%
    Lowest Elevation
    31 Ft
    Highest Elevation
    330 Ft
    Total Length of Open Channel
    0.0 Miles
    Total Length of Storm Drainage Pipes:
    3.3 Miles

    Salmon Present in the Basin

    • Chinook*+ (Lake only)
    • Coho+ (Lake only)
    • Kokanee+ (Lake only)
    • Sockeye (Lake only)
    • Rainbow & Cutthroat Trout (Lake only)
    • 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)
    926
    % of all Basins
    0.6%
    Basin Population Density
    3,895 People per Square Mile

    Land Use

    Entire Basin Within Bellevue
    Public Right of Way 17.0% 17.1%
    Commercial/Office 0.0% 0.0%
    Industrial 0.0% 0.0%
    Institutional/Government 0.0% 0.0%
    Mixed Use/Misc 4.9% 4.9%
    Multi-Family 0.0% 0.0%
    Open Space/Park 2.5% 2.5%
    Single Family Residential 74.6% 74.5%
    Unknown 1.0% 1.0%

    Land Cover

    Entire Basin Within Bellevue
    Impervious 37.5% 37.8%
    Tree Canopy 44.8% 45.2%
    Impervious in 100 Ft Stream Buffer 0.0% 0.0%
    Tree Canopy in 100 Ft Stream Buffer 0.0% 0.0%