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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.
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 Basin | Within Bellevue | |
| Public Right of Way | 16.8% | 17.9% |
|---|---|---|
| Commercial/Office | 8.5% | 7.9% |
| Industrial | 0.9% | 0.9% |
| Institutional/Government | 4.3% | 4.7% |
| Mixed Use/Misc | 5.8% | 5.5% |
| Multi-Family | 2.6% | 2.9% |
| Open Space/Park | 16.4% | 11.6% |
| Single Family Residential | 38.6% | 42.2% |
| Unknown | 6.1% | 6.4% |
Land Cover
| Entire Basin | Within Bellevue | |
| Impervious | 37.7% | 40.9% |
|---|---|---|
| Tree Canopy | 42.8% | 39.2% |
| Impervious in 100 Ft Stream Buffer | 18.5% | 19.3% |
| Tree Canopy in 100 Ft Stream Buffer | 66.9% | 65.6% |