West Tributary Basin Drainage Details

Lake Washington Watershed (WRIA 8) / State Stream #08-0264

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.

Please check out the PDF fact sheet version

Land Characteristics

Basin Area
963 Total Acres
City Area
4.5%
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
27 Ft
Highest Elevation
496 Ft
Total Length of Open Channel
3.4 Miles
Total Length of Storm Drainage Pipes:
18 Miles

Salmon Present in the Basin

  • Chinook*+
  • Coho+
  • Sockeye
  • Cutthroat Trout

* 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)
2,903
% of all Basins
1.9%
Basin Population Density
1,928 People per Square Mile

Land Use

Entire Basin Within Bellevue
Public Right of Way 15.8% 15.8%
Commercial/Office 15.4% 15.4%
Industrial 10.2% 10.2%
Institutional/Government 4.0% 4.0%
Mixed Use/Misc 9.4% 9.4%
Multi-Family 1.2% 1.2%
Open Space/Park 9.3% 9.3%
Single Family Residential 30.1% 30.1%
Unknown 4.5% 4.5%

Land Cover

Entire Basin Within Bellevue
Impervious 47.5% 47.5%
Tree Canopy 35.7% 35.7%
Impervious in 100 Ft Stream Buffer 28.4% 28.4%
Tree Canopy in 100 Ft Stream Buffer 48.9% 48.9%
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