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City of Bellevue, WA Utilities
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City of Bellevue

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  1. Home
  2. City Government
  3. Departments
  4. Utilities
  5. Utility Services
  6. Storm and Surface Water
  7. Drainage Basins
  8. Combined Drainage Basins
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    Combined Drainage Basins

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

    City of Bellevue.jpg

    Please check out the PDF fact sheet version

    Land Characteristics

    Basin Area

    25,667 Total Acres

    Lowest Elevation

    15 Ft

    Highest Elevation

    1,563 Ft

    Total Length of Open Channel

    85.5 Miles

    Total Length of Storm Drainage Pipes:

    466.7 Miles

    * 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)

    150,842

    % of all Basins

    91.4%

    Basin Population Density

    3,761 People per Square Mile

    Salmon Present in the Basin

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

    Land Use

     Entire BasinWithin Bellevue
    Public Right of Way16.8%17.9%
    Commercial/Office8.5%7.9%
    Industrial0.9%0.9%
    Institutional/Government4.3%4.7%
    Mixed Use/Misc5.8%5.5%
    Multi-Family2.6%2.9%
    Open Space/Park16.4%11.6%
    Single Family Residential38.6%42.2%
    Unknown6.1%6.4%

    Land Cover

     Entire BasinWithin Bellevue
    Impervious37.7%40.9%
    Tree Canopy42.8%39.2%
    Impervious in 100 Ft Stream Buffer18.5%19.3%
    Tree Canopy in 100 Ft Stream Buffer66.9%65.6%

    Reasonable Accommodation

    For alternate formats, interpreters, or reasonable modification requests please phone at least 48 hours in advance 425-452-6800 (voice) or email servicefirst@bellevuewa.gov. For complaints regarding modifications, contact the City of Bellevue ADA, Title VI, and Equal Opportunity Officer at ADATitleVI@bellevuewa.gov.

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