{{Use American English|date=February 2025}} {{Infobox river | name = Toutle River | name_native = | name_native_lang = | name_other = | name_etymology = A Native American subgroup called ''Hullooetell'' by Lewis and Clark<ref>{{cite book|last=Bright|first=William|title=Native American Placenames of the United States|year=2004|publisher=University of Oklahoma Press|location=Norman, Oklahoma|page=510|isbn=0-8061-3576-X}}</ref> <!---------------------- IMAGE & MAP --> | image = Toutle River in flood.jpg | image_size = 300 | image_caption = Mouth of the river in flood near Castle Rock before the 1980 eruption of Mount St. Helens | map = | map_size = 300 | map_caption = | pushpin_map = USA Washington | pushpin_map_size = 300 | pushpin_map_caption= Location of the mouth of Toutle River in Washington <!---------------------- LOCATION --> | subdivision_type1 = Country | subdivision_name1 = United States | subdivision_type2 = State | subdivision_name2 = Washington | subdivision_type3 = | subdivision_name3 = | subdivision_type4 = County | subdivision_name4 = Cowlitz | subdivision_type5 = | subdivision_name5 = <!---------------------- PHYSICAL CHARACTERISTICS --> | length = {{convert|17.2|mi|km|abbr=on}}<ref name="TopoQuest"/> | width_min = | width_avg = | width_max = | depth_min = | depth_avg = | depth_max = | discharge1_location= {{convert|6.5|mi|km}} from the mouth<ref name="discharge">{{cite web|title=Water-Data Report 2011: 14242580 Toutle River at Tower Road, Near Silver Lake, WA|url=https://wdr.water.usgs.gov/wy2011/pdfs/14242580.2011.pdf|format=PDF|publisher=United States Geological Survey|accessdate=February 11, 2013}}</ref> | discharge1_min = {{convert|243|cuft/s|m3/s|abbr=on}} | discharge1_avg = {{convert|2095|cuft/s|m3/s|abbr=on}}<ref name="discharge">{{cite web|title=Water-Data Report 2011: 14242580 Toutle River at Tower Road, Near Silver Lake, WA|url=https://wdr.water.usgs.gov/wy2011/pdfs/14242580.2011.pdf|format=PDF|publisher=United States Geological Survey|accessdate=February 11, 2013}}</ref> | discharge1_max = {{convert|61800|cuft/s|m3/s|abbr=on}} <!---------------------- BASIN FEATURES --> | source1 = Confluence of North and South forks | source1_location = near Toutle | source1_coordinates= {{coord|46|19|40|N|122|43|03|W|display=inline}} | source1_elevation = {{convert|440|ft|abbr=on}}<ref>Derived via Google Earth using ''Geographic Names Information System'' (GNIS) source coordinates.</ref> | mouth = Cowlitz River | mouth_location = near Castle Rock | mouth_coordinates = {{coord|46|18|39|N|122|55|06|W|display=inline,title}}<ref name="gnis">{{cite web|work=Geographic Names Information System| publisher=United States Geological Survey|date=September 10, 1979|url={{Gnis3|1509058}}|title= Toutle River|accessdate =July 20, 2010}}</ref> | mouth_elevation = {{convert|46|ft|abbr=on}}<ref name="gnis"/> | progression = | river_system = | basin_size = {{convert|511|sqmi|abbr=on}} | tributaries_left = | tributaries_right = | custom_label = | custom_data = | extra = }} The '''Toutle River''' is a {{convert|17.2|mi|km|adj=on}} tributary of the Cowlitz River in the U.S. state of Washington. It rises in two forks merging near Toutle below Mount St. Helens and joins the Cowlitz near Castle Rock, {{convert|20|mi|km}} upstream of the larger river's confluence with the Columbia River.<ref name="TopoQuest">{{cite web|author=United States Geological Survey|title=United States Topographic Map|publisher=TopoQuest|url=http://www.topoquest.com/map.php?lat=46.310833&lon=-122.918333&datum=nad83&zoom=4|accessdate=February 10, 2013}} River miles are marked and numbered on the relevant map quadrangles.</ref>
The river was altered by the 1980 eruption of Mount St. Helens, a nearby volcano, and subsequent flows of ash and other debris. It was further altered by dredging to remove sediment, and by construction of the Toutle River Sediment Retention Structure on the North Fork Toutle River.
==Course== The Toutle River begins at the confluence of the North Fork Toutle River and the South Fork Toutle River near the community of Toutle. The forks originate on Mount St. Helens in Mount St. Helens National Volcanic Monument, and flow generally west to form the main stem, which continues generally west, with significant north–south deviations. The town of Toutle lies to the left of the river at river mile (RM) 17.2 or river kilometer (RK) 27.7.<ref name="TopoQuest"/>
At first the Toutle River flows north for about {{convert|1|mi|km|0}} along the base of Beigle Mountain, which is on its right. The river continues generally north until, at about RM 13 (RK 21), it begins a sweeping turn to the southwest. For the next several miles, Tower Road runs along the right bank of the river, and at about RM 10 (RK 16) Tower Cemetery is on the right. Downstream of the cemetery, the river passes through Hollywood Gorge, where Rock Creek enters from the right. The river continues southwest through RM 7 (RK 11), where it receives Stankey Creek from the left.<ref name="TopoQuest"/>
The Toutle River then turns west, passing under Tower Road and receiving Cline Creek from the right. Over the next stretch, Burma Road is on the right. Over its final {{convert|4|mi|km|0}}, the Toutle meanders generally southwest through large deposits of sand. The stream passes under Barnes Drive and then Interstate 5 before entering the Cowlitz River about {{convert|2|mi|km|0}} upstream from the city of Castle Rock. Below the confluence, the Cowlitz continues for {{convert|20|mi|km}}, entering the Columbia River about {{convert|68|mi|km}} from its mouth on the Pacific Ocean.<ref name="TopoQuest"/>
===Discharge=== The United States Geological Survey monitors the flow of the Toutle River at a stream gauge at RM 6.5 (RK 10.5). The average flow of the river is {{convert|2095|cuft/s|m3/s}}. This is from a drainage area of {{convert|416|sqmi|km2}}, about 81 percent of the total Toutle River watershed. The maximum flow recorded there was {{convert|61800|cuft/s|m3/s}} on Feb. 8, 1996, and the minimum flow was {{convert|243|cuft/s|m3/s|2}} on Oct. 14, 1987. This data covers a 30-year period that began in 1981, after the volcanic eruption. Extremes outside the period of record include two large floods on May 18, 1980, related to volcanic mud flows that came down the South Fork and then the North Fork, spaced nine hours apart.<ref name="discharge"/>
==Volcanic sediment== The eruption of Mount St. Helens and subsequent lahars poured vast amounts of sediment into the Toutle. The United States Army Corps of Engineers dredged sediment from the river and built the $65 million Toutle River Sediment Retention Structure on the North Fork Toutle River to prevent debris from continuing downstream.
Part of the same engineering works is a tunnel to drain Spirit Lake, on the north side of the volcano, after the eruption blocked the lake's natural outlet.<ref>{{cite news|last=Bernton|first=Hal|title=Taming the Toutle River|url=http://seattletimes.com/html/localnews/2002072037_volcanoplumbing25m.html|work=Seattle Times|date=October 25, 2004|accessdate=February 10, 2013}}</ref>
==Gallery== <gallery widths=240 heights=180> File:North Fork Toutle River valley in November 1983.jpg|North Fork Toutle River valley, filled with Mount St. Helens landslide debris and hummocks. File:Dredging Toutle River.jpg|Dredging the Toutle River of volcanic ash. File:USACE sediment retention structure Toutle River.jpg|The Sediment Retention Structure on the North Fork. </gallery>
==See also== {{commons category|Toutle River}} *North Fork Toutle River *List of rivers of Washington (state) *List of tributaries of the Columbia River *Mount St. Helens National Volcanic Monument
==References== {{reflist|30em}}
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Category:Rivers of Washington (state) Category:Rivers of Cowlitz County, Washington Category:Mount St. Helens Category:Gifford Pinchot National Forest