Snoqualmie River

Snoqualmie River
Flood on the Snoqualmie River, a few kilometers below the Snoqualmie Falls (December 2004)
Data
Water code	US :  1526021
location	King County in Washington (USA)
River system	Snohomish River
Drain over	Snohomish River  → Pacific Ocean
confluence	from North Fork and Middle Fork Snoqualmie River 47 ° 31 ′ 15 ″  N , 121 ° 46 ′ 33 ″  W
Source height	125  m
confluence	with the Skykomish River to the Snohomish River Coordinates: 47 ° 49 '49 "  N , 122 ° 2' 47"  W 47 ° 49 '49 "  N , 122 ° 2' 47"  W
Mouth height	5  m
Height difference	120 m
Bottom slope	1.7 ‰
length	72 km
Left tributaries	South Fork Snoqualmie River , Raging River
Right tributaries	Tolt River
Small towns	North Bend , Snoqualmie , Fall City , Carnation , Duvall
Course of the Snoqualmie River

Middle Fork Snoqualmie River
Water code	US :  1523089
River system	Snoqualmie River
origin	Chains Lakes 47 ° 33 '30 "  N , 121 ° 14' 15"  W.
Union	with North Fork Snoqualmie River 47 ° 31 ′ 14 ″  N , 121 ° 46 ′ 32 ″  W
Mouth height	125  m
length	approx. 66 km
Left tributaries	Pratt River
Middle Fork Snoqualmie River at North Bend . The peak in the background is Mt. Washington.

North Fork Snoqualmie River
Water code	US :  1523845
River system	Snoqualmie River
origin	Lake Kanim 47 ° 39 ′ 41 ″  N , 121 ° 28 ′ 58 ″  W.
Union	with Middle Fork Snoqualmie River 47 ° 31 ′ 14 ″  N , 121 ° 46 ′ 32 ″  W
Mouth height	125  m
length	approx. 45 km

South Fork Snoqualmie River
Water code	US :  1526254
River system	Snoqualmie River
origin	Source Lake 47 ° 27 ′ 18 ″  N , 121 ° 27 ′ 9 ″  W.
muzzle	into the Snoqualmie River 47 ° 31 '30 "  N , 121 ° 47' 9"  W.
Mouth height	122  m
length	approx. 50 km

The Snoqualmie River is a 72 km long tributary of the Snohomish River in the center of King County in the US state of Washington .

The Snoqualmie River has a north, middle and south arm as tributaries, which all drain the west side of the Cascade Mountains in the vicinity of North Bend and flow together at Snoqualmie above Snoqualmie Falls . Below the falls, the Snoqualmie River flows north through fertile farmland, passing the towns of Fall City , Carnation , and Duvall , before joining the Skykomish River to form the Snohomish River at Monroe . Other tributaries are the Tolt River at Carnation and the Raging River at Fall City.

water falls

Washington's most famous waterfall, with more than a million visitors annually, is Snoqualmie Falls, with a drop of almost 50 feet, but the river and its headwaters have several other notable falls. The around 10 m high Fantastic Falls and the 61 m high Kanim Falls are located on the North Fork. At the Middle Fork there is Nellie Falls with a drop of almost 46 m . The southern branch has Twin Falls (41 m), Middle Twin Falls , Upper Twin Falls , Weeks Falls , Upper Weeks Falls , Denny Camp Falls , Franklin Falls (41 m) and the Fall-into-the-Wall Falls (around 7 m) over a series of waterfalls.

The title scenes of the television series Twin Peaks were partly filmed at Snoqualmie Falls and on the upper reaches of the river.

Kayak, canoe and rafting

The Snoqualmie River has some sections that are suitable for kayaking and rafting . The river is classified between classes II and V +.

Hydrography

The United States Geological Survey maintains a total of a dozen gauges in real time on the Snoqualmie River, its headwaters and the various tributaries in order to be able to monitor the water level.

The average annual runoff at the Carnation gauge between 1930 and 2006 was 105 m³ / s. The highest observed value occurred on November 24, 1990 and reached around 1850 m³ / s, the lowest value was measured on August 21, 1945 with just under 7 m³ / s.

Floods

The Snoqualmie River is prone to flash floods, which occur several times a year and flood farmland and low-lying roads. In extreme floods, the access roads to Carnation and Duvall become impassable. The last two times this happened in 2006 and before that in 1990.

The Army Corps of Engineers completed a controversial project in 2005 that reduced the impact of floods on Snoqualmie by widening the river bed just above the falls.

traffic

The transcontinental railroad of the Chicago, Milwaukee, St. Paul and Pacific Railroad (Milwaukee Road) led through the river valley of the southern arm South Fork Snoqualmie River .

See also

• List of rivers in Washington

Web links

Commons : Snoqualmie River  - album with pictures, videos and audio files

• NOAA - Snoqualmie Stations

Individual evidence

1. ↑ Cataloged Waterfalls in the Snoqualmie River Watershed . Retrieved February 14, 2011.
2. ^ Northern Cascade Range, Washington Whitewater Rivers . Retrieved February 14, 2011.
3. ↑ United States Geological Survey. Water Data Report Washington 2006 (PDF file; 106 kB). Retrieved February 18, 2008.