Stillaguamish River
| Stillaguamish River | ||
 North and South Fork unite at Arlington |
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| Data | ||
| Water code | US : 1508743 | |
| location | Washington (USA) | |
| River system | Stillaguamish River | |
| confluence | of North Fork Stillaguamish River and South Fork Stillaguamish River at Arlington , Snohomish County 48 ° 12 ′ 14 ″ N , 122 ° 7 ′ 38 ″ W |
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| muzzle |
Puget Sound Coordinates: 48 ° 13 ′ 22 " N , 122 ° 19 ′ 59" W 48 ° 13 ′ 22 " N , 122 ° 19 ′ 59" W. |
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| Mouth height |
0 m
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| length | 35 km | |
| Catchment area | 1813 km² | |
| North Fork drain at Arlington, Wa. |
MQ |
54 m³ / s |
| Small towns | Arlington | |
The Stillaguamish River is a river in the northwest of the US state Washington .
It arises mainly from two arms, the 72 km long northern arm and the southern arm. The two arms join at Arlington , from where the river travels about 35 km to its confluence with the Puget Sound . The river's catchment area drains part of the Cascade Range north of Seattle and covers an area of 1,813 km².
Run
The Stillaguamish River is formed by the confluence of the northern and southern arms, both of which have their origins in the Cascade Range. The northern arm originates from multiple branches in a remote area of Skagit County near Finney Peak , about 15 km north of Darrington . The river gathers water from a variety of creeks and initially flows southward. It later flows west at the foot of the mountains along the county boundary between Skagit Counties and Snohomish Counties . Tributaries of the North Fork Stillaguamish River are Boulder River and Deer Creek.
The 30 miles long southern arm rises almost in the middle of Snohomish County, about 20 miles south of Darrington, and flows west and northwest past Silverton, Robe, and Granite Falls.
The two arms of the river unite at Arlington in the northwest of Snohomish County. The Stillaguamish River then flows towards the sea. It flows about 15 km west of Arlington at its northern end into Port Susan , an arm of the Puget Sound. Between the arms lies part of the Mount Baker-Snoqualmie National Forests .
Hydrology
On the northern arm of the Stillaguamish River, the United States Geological Survey maintains a gauge at Arlington, about 10 km above the junction with the southern arm . The annual daily flow rate in the long-term average from 1929 to 2005 was 54 m³ / s. The highest observed value was measured on October 21, 2003 and was 1250 m³ / s, the lowest water quantity of 3.3 m³ / s was observed on September 23, 1938.
Species of fish in the river
The Stillaguamish River and its tributaries are known for their salmon population . Eight species of salmon spawn in this river system. These include king salmon , silver salmon , ketal salmon , pink salmon and sockeye salmon , as well as rainbow trout and bull trout ( Salvelinus confluentus ).
Name variants
In the Geographic Names Information System of the United States Geological Survey , a number of alternative names are written for the Stillaguamish River. These include Tuxpam River, Stoh-luk-whahmpsh River, Stillaquamish River, Steilaguamish River, Stalukahamish River and other similar spellings.
Web links
- Stillaguamish River in the United States Geological Survey's Geographic Names Information System
- Stillaguamish Watershed . Snohomish County website.
Individual evidence
- ↑ USGS Water Data Report 2005. NORTH FORK STILLAGUAMISH RIVER NEAR ARLINGTON, WA (PDF, accessed February 5, 2008, English; 501 kB)