Snohomish River
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| Snohomish River | |
|---|---|
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| Origin | Monroe |
| Mouth | Puget Sound |
| Basin countries | United States |
| Length | 32 km (20 mi) <ref name="Snohomishriverflow"> Snohomish River Watershed Draft Initial Assessment</ref> |
| Mouth elevation | sea level |
| Avg. discharge | 269 m³/s (9,500 ft³/s) |
| Basin area | 4,807 km² (1,856 mi²)<ref>Surface Water Management Division: Snohomish River Salmon Recovery</ref> |
The Snohomish River is a Washington river formed by the confluence of the Skykomish and Snoqualmie rivers near Monroe. It flows northwest entering Puget Sound between Everett and Marysville. The Pilchuck River is its main tributary and joins the river at Snohomish. The river system drains the west side of the Cascade Mountains from Snoqualmie Pass north to beyond Stevens Pass.
Measured at Monroe, the Snohomish River has an average annual flow of 9,500 ft³/s.<ref name="Snohomishriverflow"/> In comparison, the Columbia River, Washington's largest river, has an average annual flow of 190,000 cubic feet per second, as measued at The Dalles, Oregon.<ref name="columbiariverflow">Columbia River Facts and Maps</ref>
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