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Index card: Oblique aerial view looking downstream on Muddy River at a point immediately downstream from where Muddy River plunged through the canyon. Note the trees left in the middle of the mudflow, and note in particular a rock (see also slide no. 13ct (cvoa0013_ct)) downstream from a clump of trees in the center of the slide. Skamania County, Washington. May 19, 1980.
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Index card: Time-lapse camera and still photography camera setup. There are numerous photo stations throughout the crater. This particular station approximately one kilometer to the north of the dome has been an ideal spot for movie cameras (pictured), and also for 35mm photography to document the growth of the dome. Skamania County, Washington. May 19, 1982.
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Index card: Oblique aerial view of secondary steam fumarole near Spirit Lake. Fumarole is 300 feet in diameter. Eruptions occurred hourly and continued for two months after May 18, 1980. Skamania County, Washington. 1980.
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Index card: View of the mudflow beginning to move downstream from the blast material deposited in the North Fork Toutle valley. This mudflow took nine hours to build in size sufficient to reach through the blasted material and move downstream to the Cowlitz River valley. The mudflow on the South Fork Toutle River arrived at Castle Rock three hours after the eruption of Mount St. Helens and that from the North Fork by 12 hours. Cowlitz County, Washington. May 18, 1980. (Photo by Harry Glicken, USGS/CVO).
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Index card: Nearer view of two large rocks deposited on roadway of remaining abutment on right side of Pine Creek channel near its mouth. This suggests that these large rocks were riding very high in the mudflow and were pushed laterally and deposited away from the mudflow. Geologists for scale. Skamania County, Washington. 1980. (Photo by R.R. Adsit, USGS/WRD).
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Index card: This graph shows the elevation of the thalweg Cowlitz River from the Lewis County line to the Columbia River. Note its position prior to the May 18, 1980 mudflow shown by the brown cross-hatch. The bed of the river was raised 12 to 15 feet throughout its entire length. Cowlitz County, Washington. 1980.
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Index card: Oblique aerial view of bridge displaced in the North Fork Toutle River valley. Note the battering of the superstructure by logs and rocks from the mudflow. Cowlitz County, Washington. 1980. (Same as MSH-PP 1249 no. 35ct (msh_1249_00035_ct)). Published as Figure 31-D in U.S. Geological Survey. Professional Paper 1249. 1982.
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Index card: Oblique aerial view of mudflow deposits at Camp Baker, a logging camp located about 17 miles downstream in the North Fork Toutle River valley. Note the fully loaded logging train at the right of the picture, and the overturned logging equipment. Cowlitz County, Washington. 1980.
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Index card: Blast crossed divide and reached into South Fork Toutle River valley here. Note standing trees killed by the blast - seven miles downstream from the mountain. Cowlitz County, Washington. 1980.
map background search result map search result map Large rocks deposited on the Pine Creek channel roadway. Mount St. Helens, Skamania County, Washington. 1980. View of the mudflow beginning to move downstream from the blast material deposited in the North Fork Toutle valley. Mount St. Helens, Cowlitz County, Washington. 1980. Oblique aerial view of mudflow deposits at Camp Baker, North Fork Toutle River valley. Mount St. Helens, ​Cowlitz County, Washington. 1980. Oblique aerial view of bridge displaced in the North Fork Toutle River valley. Mount St. Helens, Cowlitz County, Washington. 1980. Oblique aerial view of secondary steam fumarole near Spirit Lake. Mount St. Helens, ​Skamania County, Washington. 1980. Mount St. Helens blast crossed divide into South Fork Toutle River valley. ​Cowlitz County, Washington. 1980. Worms in water along Muddy River, as life comes back to the area after the Mount St. Helens eruption. Skamania County, Washington. 1980. "Injured man" trapped in ash along east shore of Spirit Lake. Mount St. Helens, ​Skamania County, Washington. 1980. Mudline near I-5 bridge. Mount St. Helens, Cowlitz County, Washington. 1980. Time-lapse camera and still photography camera setup used to document Mount St. Helens dome. ​Skamania County, Washington. 1982. View of Mt. Hood from across the pumice plain at Mount St. Helens. Skamania County, Washington, and Hood River County, Oregon. 1983. Nearer oblique aerial view of the eruption of May 18, 1980. Mount St. Helens, Skamania County, Washington. 1980. Oblique aerial view looking downstream on Muddy River. Mount St. Helens, Skamania County, Washington. 1980. This graph shows the elevation of the thalweg Cowlitz River from the Lewis County line to the Columbia River. Mount St. Helens, Cowlitz County, Washington. 1980. Cleanup of ash from Mount St. Helens in Yakima. Yakima County, Washington. 1980. A small plane made a successful forced landing near Mount St. Helens. Skamania County, Washington. 1980. Glow of logs burning in the blast zone, six months after the May 18, 1980 blast, Smith Creek. Mount St. Helens, Skamania County, Washington. View of blooming flowers amid Mount St. Helens devastation from May 18, 1980 eruption. Skamania County, Washington. 1980. View showing red glow of Mount St. Helens inner dome as red spots. Skamania County, Washington. 1982. View of Mt. Rainier to the north, seen from Mount St. Helens. Mount Rainier National Park, Pierce County, Washington. 1981. View of the mudflow beginning to move downstream from the blast material deposited in the North Fork Toutle valley. Mount St. Helens, Cowlitz County, Washington. 1980. Oblique aerial view of mudflow deposits at Camp Baker, North Fork Toutle River valley. Mount St. Helens, ​Cowlitz County, Washington. 1980. Oblique aerial view of bridge displaced in the North Fork Toutle River valley. Mount St. Helens, Cowlitz County, Washington. 1980. Mount St. Helens blast crossed divide into South Fork Toutle River valley. ​Cowlitz County, Washington. 1980. Mudline near I-5 bridge. Mount St. Helens, Cowlitz County, Washington. 1980. This graph shows the elevation of the thalweg Cowlitz River from the Lewis County line to the Columbia River. Mount St. Helens, Cowlitz County, Washington. 1980. Large rocks deposited on the Pine Creek channel roadway. Mount St. Helens, Skamania County, Washington. 1980. Oblique aerial view of secondary steam fumarole near Spirit Lake. Mount St. Helens, ​Skamania County, Washington. 1980. Worms in water along Muddy River, as life comes back to the area after the Mount St. Helens eruption. Skamania County, Washington. 1980. "Injured man" trapped in ash along east shore of Spirit Lake. Mount St. Helens, ​Skamania County, Washington. 1980. Time-lapse camera and still photography camera setup used to document Mount St. Helens dome. ​Skamania County, Washington. 1982. Nearer oblique aerial view of the eruption of May 18, 1980. Mount St. Helens, Skamania County, Washington. 1980. Oblique aerial view looking downstream on Muddy River. Mount St. Helens, Skamania County, Washington. 1980. A small plane made a successful forced landing near Mount St. Helens. Skamania County, Washington. 1980. Glow of logs burning in the blast zone, six months after the May 18, 1980 blast, Smith Creek. Mount St. Helens, Skamania County, Washington. View of blooming flowers amid Mount St. Helens devastation from May 18, 1980 eruption. Skamania County, Washington. 1980. View showing red glow of Mount St. Helens inner dome as red spots. Skamania County, Washington. 1982. View of Mt. Hood from across the pumice plain at Mount St. Helens. Skamania County, Washington, and Hood River County, Oregon. 1983. View of Mt. Rainier to the north, seen from Mount St. Helens. Mount Rainier National Park, Pierce County, Washington. 1981. Cleanup of ash from Mount St. Helens in Yakima. Yakima County, Washington. 1980.