Tolt River Flooding Information
USGS gage data, map, alert phases, and recent high flows

Tolt River conditions: hold your mouse pointer over a river gage [] on this map or view the gage data table.
» Tolt River Basin Weather Stations
» Snoqualmie Valley River Conditions for Mobile

» Tolt River Basin Weather Stations

USGS Gage Name	Time, Date	Stage (feet)	Flow (c.f.s.)	Flow Change (c.f.s./hr)
North Fork Tolt River near Carnation, WA (external link)	7:15 PM, 9/19	3.26	57	-2
South Fork Tolt River below Regulating Basin near Carnation, WA (external link)	7:15 PM, 9/19	3.3	70	0
Tolt River near Carnation, WA (external link)	7:15 PM, 9/19	4.52	148	0
Notes: The next request for USGS data is 6 minutes, 56 seconds from when this page was loaded. King County provides funding to the United States Geological Survey to support the operation and maintenance of river and stream gages and related systems.

Flood Phase Information
Phase	Flow at Tolt River gage near Carnation	Description	Condition
1	1500 c.f.s.	Internal Alert
2	2500 c.f.s.	Minor Flooding	San Souci area homes may be inaccessible and experience high water depths and velocities. Tolt River Rd and some driveways may overtop.
3	4500 c.f.s.	Moderate Flooding	Increased water depth and velocity in San Souci and other areas.
4	7000 c.f.s.	Major Flooding	Levees may overtop near Carnation. Channel changes may occur.

Recent High Flow Data: Tolt River near Carnation
November 6, 2006 Provisional Data	10,500 c.f.s.
January 18, 2005	7,090 c.f.s.
October, 2003	11,100 c.f.s.
December, 1999	11,800 c.f.s.
February, 1996	10,300 c.f.s.
November, 1995	11,400 c.f.s.
November, 1990	11,200 c.f.s.

More Tolt River Flood Information

Video of the Election Day Flood, November, 2006:

• Snqoualmie Valley Flooding including Tolt River, Real Media format
• Snoqualmie Valley Flooding including Tolt River, Windows Media format

Photos of phase 4 flood, November, 2006
Lower Tolt River Floodplain Restoration Project
Snoqualmie River Flooding Information

» Return to the The Flood Warning System Page
» Visit King County Flooding Services

For questions about the Flood Warning System site, please contact Ken Zweig, River and Floodplain Management Unit.

For questions about the Water and Land Resources Website, please contact Fred Bentler, webmaster.

Updated: Sep. 19, 2008, 7:15 PM