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Mudflows on south side of Mount St. Helens, Skamania County, Washington. 1980. View of Holly A. Martinson studying mudflows on south side of Mount St. Helens. Skamania County, Washington. September 28, 1980. Categories: Image; Tags: CVO Cascade Volcano Observatory Collection, Mount St. Helens, Photographers, Volcanoes, color transparency (slides) Mount St. Helens from the pumice plain, Skamania County, Washington. 1980. Mount St. Helens from the pumice plain, from the northwest. Skamania County, Washington. September 16, 1980. Categories: Image; Tags: CVO Cascade Volcano Observatory Collection, Mount St. Helens, Photographers, Volcanoes, color transparency (slides) Rain gage, Mount St. Helens, Skamania County, Washington. 1981. Near view of rain gage set up on the pumice plain near Mount St. Helens. A network of weighing bucket and tipping bucket rain gages was set up in 1980 around Castle, Coldwater, and Spirit Lakes to assess rainfall patterns around Mount St. Helens. The information is used to help assess lake levels and fill. Some data are telemetered back to Vancouver, Washington; other gages are serviced manually once a month. Skamania County, Washington. October 15, 1981. Published in U.S. Geological Survey Earthquake Information Bulletin, v. 16, no.2, March-April 1984, p.121. Categories: Image; Tags: CVO Cascade Volcano Observatory Collection, Mount St. Helens, Photographers, Volcanoes, color transparency (slides) Devastation along the Cowlitz River, Cowlitz County, Washington. 1980. Devastation along the Cowlitz River resulting from the May 18, 1980, lahars. Garage? half-buried by mudflow. Cowlitz County, Washington. July 15, 1980. Categories: Image; Tags: CVO Cascade Volcano Observatory Collection, Mount St. Helens, Photographers, Volcanoes, color transparency (slides) Muddy River bridges destroyed, Skamania County, Washington. 1980. Ruins of one of a number of Muddy River bridges destroyed by the May 18, 1980, eruption of Mount St. Helens. Skamania County, Washington. September 23, 1980. Categories: Image; Tags: CVO Cascade Volcano Observatory Collection, Mount St. Helens Collection, Photographers, Skamania County, Washington, Volcanoes, All tags... color transparency (slides), Fewer tags Corps of Engineers Spirit Lake Pump Station, Skamania County, Washington. 1982. Oblique aerial view of the Corps of Engineers Spirit Lake Pump Station, built in 1982 as a temporary means to lower the level of Spirit Lake.of Skamania County, Washington. November 2, 1982. Categories: Image; Tags: CVO Cascade Volcano Observatory Collection, Mount St. Helens, Photographers, Volcanoes, color transparency (slides) Smith Creek tree blowdown, Skamania County, Washington. 1982. View along Smith Creek showing tree blowdown, singed trees, and green trees which missed the blast. Skamania County, Washington. April 26, 1982. Categories: Image; Tags: CVO Cascade Volcano Observatory Collection, Mount St. Helens, Photographers, Volcanoes, color transparency (slides) Lahar, Upper Muddy River fan, Skamania County, Washington. 1980. View of lahar surface of the Upper Muddy River fan. See also photo no. cvof0047. Skamania County, Washington. October 24, 1980. Categories: Image; Tags: CVO Cascade Volcano Observatory Collection, Mount St. Helens, Photographers, Volcanoes, color transparency (slides) Lahar from May 18, 1980, down the Muddy River drainage, ​Skamania County, Washington. 1980. View of lahar from May 18, 1980, down the Muddy River drainage, southeast flank of Mount St. Helens. A beheaded Shoestring Glacier is visible on the mountain. Skamania County, Washington. October 1980. Categories: Image; Tags: CVO Cascade Volcano Observatory Collection, Mount St. Helens, Photographers, Volcanoes, color transparency (slides) Leveling around Mount St. Helens dome, Skamania County, Washington. 1981. USGS scientists leveling around Mount St. Helens dome. Repeated leveling circuits around the dome have been performed to determine possible changes of the crater floor before eruptions. Skamania County, Washington. November 6, 1981. Published in U.S. Geological Survey Earthquake Information Bulletin, v. 16, no.2, March-April 1984, p.77. Categories: Image; Tags: CVO Cascade Volcano Observatory Collection, Mount St. Helens, Photographers, Volcanoes, color transparency (slides) Phreatic explosion pit, Skamania or Cowlitz Counties. 1980. Oblique aerial view of phreatic explosion pit. Note erosion and fill. Skamania or Cowlitz Counties, Washington. August 1980. Categories: Image; Tags: CVO Cascade Volcano Observatory Collection, Mount St. Helens, Photographers, Volcanoes, color transparency (slides) Blast tree stump on Harrys Ridge, Skamania County, Washington. 1984. Blast tree stump on Harrys Ridge, five miles (eight kilometers) to the north of Mount St. Helens. Volcano visible in the background. Skamania County, Washington. May 29, 1984. Categories: Image; Tags: CVO Cascade Volcano Observatory Collection, Mount St. Helens, Photographers, Volcanoes, color transparency (slides) Dredging the mud and silt along the North Fork Toutle River, Cowlitz County, Washington. 1981. Corps of Engineers dredging the mud and silt from May 18, 1980, along the North Fork Toutle River. Cowlitz County, Washington. February 5, 1981. Categories: Image; Tags: CVO Cascade Volcano Observatory Collection, Mount St. Helens, Photographers, Volcanoes, color transparency (slides) Lahar from May 18, 1980, down the South Fork Toutle River drainage, Cowlitz County, Washington. 1980. Lahar from May 18, 1980, down the South Fork Toutle River drainage, west flank of Mount St. Helens. Cowlitz County, Washington. October 4, 1980. Categories: Image; Tags: CVO Cascade Volcano Observatory Collection, Mount St. Helens, Photographers, Volcanoes, color transparency (slides) Mudline, Toutle River near Interstate 5 bridge, Castle Rock., Cowlitz County, Washington. 1980. USGS scientist Brian Drost examining mudline left by lahar along Toutle River near Interstate 5 bridge, Castle Rock. Cowlitz County, Washington. September 30, 1980. Categories: Image; Tags: CVO Cascade Volcano Observatory Collection, Mount St. Helens, Photographers, Volcanoes, color transparency (slides) Suspended sediment samples, Highway 99 near Castle Rock, Cowlitz County, Washington. 1982. Scientist Al Onions taking suspended sediment samples along Highway 99 near Castle Rock. Cowlitz County, Washington. December 5, 1982. Published in U.S. Geological Survey. Earthquake information bulletin, v. 16, no.2. March-April 1984, p.115. Categories: Image; Tags: CVO Cascade Volcano Observatory Collection, Mount St. Helens, Photographers, Volcanoes, color transparency (slides) Drainage channel, Smith Creek, Skamania County, Washington. 1980. Newly incised drainage channel in the Mount St. Helens blast zone, on Smith Creek. In 1980 this drainage channel was approximately 80 feet wide and 20 feet deep. One year later, in 1981, the drainage channel was approximately 200 feet wide and 36 feet deep. Note the remains of trees in the channel and people for scale near center of view. Skamania County, Washington. September 1980. Published in U.S. Geological Survey Earthquake Information Bulletin, v. 16, no.2, March-April 1984, p.109. Categories: Image; Tags: CVO Cascade Volcano Observatory Collection, Mount St. Helens, Photographers, Volcanoes, color transparency (slides) Devastation, Cowlitz River, Cowlitz County, Washington. 1980. Devastation along the Cowlitz River resulting from the May 18, 1980, lahars. House inundated by mudflow. Cowlitz County, Washington. July 15, 1980. Categories: Image; Tags: CVO Cascade Volcano Observatory Collection, Mount St. Helens, Photographers, Volcanoes, color transparency (slides) "Bayonet" trees, Skamania County, Washington. 1980. "Bayonet" trees bent and stripped by the May 18, 1980, eruption of Mount St. Helens. Skamania County, Washington. October 23, 1980. Categories: Image; Tags: CVO Cascade Volcano Observatory Collection, Mount St. Helens, Photographers, Volcanoes, color transparency (slides) Comparative view, one year later, lahar, Upper Muddy River fan, Skamania County, Washington. 1981. Comparative view, one year later, of lahar surface of the Upper Muddy River fan, east of Mount St. Helens. Effects of erosion visible. See also photo no. cvof0046. Skamania County, Washington. October 10, 1981. Categories: Image; Tags: CVO Cascade Volcano Observatory Collection, Mount St. Helens, Photographers, Volcanoes, color transparency (slides) « 1 2 3 »