page_title: Snoqualmie River
section_title: Flooding
hierarchical_section_title: Snoqualmie River / Flooding
caption_attribution_description: English: Snoqualmie River "Stream Gaging Station, U.S. Geological Survey", antenna for datalink USGS 12149000 SNOQUALMIE RIVER NEAR CARNATION, WA
context_page_description: The Snoqualmie River is a 45-mile long river in King County and Snohomish County in the U.S. state of Washington. The river's three main tributaries are the North, Middle, and South Forks, which drain the west side of the Cascade Mountains near the town of North Bend and join near the town of Snoqualmie just above the Snoqualmie Falls. After the falls the river flows north through rich farmland and the towns of Fall City, Carnation, and Duvall before meeting the Skykomish River to form the Snohomish River near Monroe. The Snohomish River empties into Puget Sound at Everett. Other tributaries of the Snoqualmie River include the Taylor River and the Pratt River, both of which enter the Middle Fork, the Tolt River, which joins at Carnation, and the Raging River at Fall City.
  Many of the Snoqualmie River's headwaters originate as snowmelt within the Alpine Lakes Wilderness. On August 8, 2007, U.S. Representative Dave Reichert, King County Executive Ron Sims, and others announced a proposal to expand the Alpine Lakes Wilderness to include the valley of the Pratt River, a tributary of the Middle Fork, near the town of North Bend.
context_section_description: The Snoqualmie River is prone to flooding and typically sees multiple flood events annually that inundate local farmland and close low-lying roads. During record level floods, all road access to the towns of Carnation and Duvall becomes closed off. The last three times this happened were during the floods of 2009, 2006, and 1990.
  The river level of the Snoqualmie River is monitored by six USGS streamgages, one on each fork, one just above the falls, one below Carnation, and one near Duvall. Data from the streamgages are used by the National Weather Service for flood forecasting and warning. The Tolt River and the Raging River are also monitored by USGS streamgages.
  The Snoqualmie Flood Reduction Project was a controversial Army Corps of Engineers project completed in 2005 to reduce the effect of floods in the town of Snoqualmie by widening the river just above the falls.
caption: Stream Gaging Station, Carnation, during the March 13, 2007 flood
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