North Sammamish Area Drainage Details

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.

Please check out the PDF fact sheet version

Land Characteristics

Basin Area
622 Total Acres
City Area
2.9%
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
444 Ft
Total Length of Open Channel
3.8 Miles
Total Length of Storm Drainage Pipes:
12.3 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)
3,877
% of all Basins
2.6%
Basin Population Density
3,987 People per Square Mile

Land Use

Entire Basin Within Bellevue
Public Right of Way 16.3% 16.3%
Commercial/Office 0.0% 0.0%
Industrial 0.0% 0.0%
Institutional/Government 2.1% 2.1%
Mixed Use/Misc 7.1% 7.1%
Multi-Family 0.8% 0.8%
Open Space/Park 14.5% 14.5%
Single Family Residential 54.9% 54.9%
Unknown 4.3% 4.3%

Land Cover

Entire Basin Within Bellevue
Impervious 33.3% 33.5%
Tree Canopy 46.7% 47.0%
Impervious in 100 Ft Stream Buffer 10.8% 10.8%
Tree Canopy in 100 Ft Stream Buffer 84.2% 84.1%
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