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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 Coal Creek Basin

    Combined Drainage Basins

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

    Greater Coal Creek 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.

    image of greater coal creek basin map

    Please check out the PDF fact sheet version

    Land Characteristics

    Basin Area
    4,551 Total Acres
    City Area
    13.2%
    Drainage Jurisdiction(s)
    Bellevue: 62.6%
    Beaux Arts: 0.0%
    Clyde Hill: 0.0%
    Issaquah: 0.0%
    King County: 23.4%
    Kirkland: 0.0%
    Medina: 0.0%
    Newcastle: 13.9%
    Redmond: 0.0%
    Renton: 0.0%
    Lowest Elevation
    18 Ft
    Highest Elevation
    1,563 Ft
    Total Length of Open Channel
    20.0 Miles
    Total Length of Storm Drainage Pipes:
    65.7 Miles

    Salmon Present in the Basin

    • Chinook*+
    • Coho+ (juveniles)
    • Sockeye
    • Rainbow & Cutthroat Trout
    • 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)
    17,699
    % of all Basins
    11.7%
    Basin Population Density
    2,489 People per Square Mile

    Land Use

      Entire Basin Within Bellevue
    Public Right of Way 11.1% 15.6%
    Commercial/Office 7.1% 0.5%
    Industrial 1.2% 0.0%
    Institutional/Government 2.0% 2.5%
    Mixed Use/Misc 4.1% 5.3%
    Multi-Family 0.4% 0.2%
    Open Space/Park 36.8% 20.3%
    Single Family Residential 34.5% 51.2%
    Unknown 3.0% 4.4%

    Land Cover

      Entire Basin Within Bellevue
    Impervious 23.0% 32.0%
    Tree Canopy 55.0% 44.8%
    Impervious in 100 Ft Stream Buffer 8.2% 9.9%
    Tree Canopy in 100 Ft Stream Buffer 86.2% 83.2%

    City of Bellevue sealCity of Bellevue, WA

    • 450 110th Avenue NE
    • Bellevue, WA 98004
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