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  • Parks Canada avalanche coordinator Jeff Goodrich describes the scope of Parks Canada’s avalanche mitigation program on Rogers Pass, British Columbia, in early March. “You’ve got 134 avalanche paths that could affect the highway here,” he said.
    20200303-rogers-pass-182.jpg
  • Avalanche control infrastructure put in place on Interstate 90 near Snoqualmie Pass, Washington, during a recent reconstruction project include snow nets, which hold snow in place so it doesn’t slide onto Interstate 90 below.
    20200306-snoqualmie-pass-137.jpg
  • A complex array of snow nets on the south face of Cougar Mountain, just west of Rogers Pass on the Trans Canada Highway. The system holds snow loads in place, keeping it from sliding and thus virtually eliminating the need for routine avalanche mitigation with explosives.
    20200303-rogers-pass-087.jpg
  • A complex array of snow nets on the south face of Cougar Mountain, just west of Rogers Pass on the Trans Canada Highway. The system holds snow loads in place, keeping it from sliding and thus virtually eliminating the need for routine avalanche mitigation with explosives.
    20200303-rogers-pass-076.jpg
  • Infrastructure put in place on Interstate 90 near Snoqualmie Pass, Washington, during a recent reconstruction project include snow nets, right, which hold snow in place, and an elevated bridge that allows snow from slide paths to pass beneth the roadway.
    20200305-snoqualmie-pass-061-065.jpg
  • A pair of snow sheds protect the Trans Canada Highway from avalanches just west of Glacier National Park in British Columbia. These sheds are maintained by the provincial government while five more a few miles to the east inside the park are managed by the federal government via Parks Canada.
    20200303-rogers-pass-373.jpg
  • Eric Bresseler dismantles pices of his avalanche mitigation system after a test of the device May 26 at Jackson Hole Mountain Resort. The resort is working through the permitting process to install one of the exploders in the Crags.
    20230526-alpine-infrastructure-149.jpg
  • Bresseler swaps out gas containers during testing of his new avalanche mitigation system last month at Jackson Hole Mountain Resort. Bresseler and his team were taking measurements of the effects of different gas mixtures to determine which were the most effective.
    20230526-alpine-infrastructure-103.jpg
  • Wyoming Department of Transportation avalanche technicians Grant Henarie and Adam Davis ascend a hillside on the west side of Teton Pass to conduct avalanche mitigation in an area known as the Beaver Slides. In addition to using the howitzer gun and Gazex exploders for control work, technicians also manually set explosives for control efforts.
    20220106-avalanche-control-280.jpg
  • Wyoming Department of Transportation avalanche technicians Adam Davis and Grant Henarie prepare to fire the department's Gazex exploder in Twin Slides during avalanche mitigation operations Thursday on Teton Pass. The exploders, located near avalanche start zones in Glory Bowl and Twin Slides, are fired remotely and create a precussion in an effort to trigger an avalanche.
    20220106-avalanche-control-083.jpg
  • WYDOT's rotary plow lumbers down the pass during Thursday's closure. Teton Pass can remain closed for several hours during avalanche mitigation depending on existing road conditions and how much snow is brought down from avalanche control efforts.
    20220106-avalanche-control-336.jpg
  • The fracture line of an avalanche on the south face of Taylor Mountain that killed snowboarder Trace Carillo on April 1 is visible at the center of this image taken Friday morning. The secondary slide to the left was triggered by a Search and Rescue helicopter conducting avalanche mitigation Thursday morning for ground crews searching for Carillo in the slide path below.
    20200403-taylor-avalanche-013.jpg
  • Jamie Yount, avalanche technician for the Wyoming Department of Transportation, during avalanche mitigation operations in Hoback Canyon south of Jackson, Wyo.
    Jamie Yount 1.jpg
  • Wyoming Department of Transportation avalanche control personnel fire the department's M101 howitzer during mitigation efforts Thursday on Teton Pass. Highway 22 over the pass was closed for several hours as crews deployed several mitigation techniques to reduce avalanche hazard for motorists.
    20220106-avalanche-control-149.jpg
  • Wyoming Department of Transportation avalanche technician Adam Davis adjusts the department's howitzer during mitigation efforts Friday on Teton Pass. The howitzer has several preset targets so crews can fire the gun with precision at night or in low-visibility conditions.
    20220106-avalanche-control-219.jpg
  • Wyoming Department of Transportation avalanche technician Brenden Cronin surveys avalanche debris that slid on the Highway 22 after mitigation crews triggered the Gazex exploder in Twin Slides on Thursday. Four feet of snow covered about 40 feet of the road.
    20220106-avalanche-control-060.jpg
  • Crown from Gazex avalanche mitigation in Glory Bowl on Mount Glory, Teton Pass, Wyoming.
    20170212-teton-pass-151.RAF
  • Wyoming Department of Transportation conducts avalanche control on Teton Pass.
    20220106-avalanche-control-290.jpg
  • Wade Whiddon of the ground engineering company Geovert, Brandon Dodge of Gazex and John Fitzgerald with the Wyoming Department of Transportation work on installing one of two new Gazex exploder tubes Friday in Glory Bowl on Teton Pass. The new exploders complete an upgrade of the original Gazex tubes used for avalanche mitigation on Mt. Glory. A third exploder in Glory Bowl and the single tube in Twin Slide were replaced in 2015. Go to jhnewsandguide.com for a video of the helicopter installation of one of the tubes.
    20201023-gazex-installation-178.jpg
  • Bridger-Teton National Forest avalanche forecaster Bob Comey chats with Jackson Hole Mountain Resort ski patrollers at Corbet's Cabin before making morning rounds to weather stations around the ski hill. Avalanche forecasters and technicians work closely with ski patrol to identify potential slide problems and mitigate avalanches at the resort.
    20170223-btnf-avalanche-lab-008.JPG
  • Highway 22 cuts through avalanche debris Sunday on Highway 22 at the base of Glory Bowl on Teton Pass. The artery between Jackson Hole and Teton Valley, Idaho, was closed for four and a half days due to dangerous avalanche conditions during a major winter storm last week. Mitigation efforts during the closure Friday by the Wyoming Department of Transportation’s Gazex system in Glory Bowl set off a slide that deposited more than 15 feet of snow onto the highway.
    20170212-glory-bowl-avalanche.JPG
  • Bridger-Teton National Forest avalanche forecaster Bob Comey, left, reads a morning report to Jackson Hole Mountain Resort ski patrol on the Aerial Tram in late-January. The report gives patrolers insight into the kinds of avalanche problems may exist and helps coordinate mitigation efforts.
    20170130-btnf-avalanche-lab-192.JPG
  • Wyoming Department of Transportation sighting in new Howitzer gun for avalanche mitigation.
    20150423-wydot-howitzer-010.RAF
  • Wyoming Department of Transportation District Three maintenance foreman Troy Jerup, top, visits with avalanche technicians during avalanche control operations January 6 on Teton Pass. Jerup, who took over the foreman position when Bruce Daigle retired last year, said he often finds himself in a piece of machinery on busy days due to staff shortages.
    20220106-avalanche-control-388.jpg
  • A helicopter lowers one of two new Gazex exploder tubes into place Friday in Glory Bowl on Teton Pass. The new exploders complete an upgrade of the original Gazex tubes used for avalanche mitigation on Mt. Glory. A third exploder in Glory Bowl and the single tube in Twin Slide were replaced in 2015. Go to jhnewsandguide.com for a video of the installation of one of the tubes.
    20201023-gazex-installation-101.jpg
  • Avalanche control infrastructure put in place on Interstate 90 near Snoqualmie Pass, Washington, during a recent reconstruction project include a large array of snow nets, which hold snow in place so it doesn’t slide onto Interstate 90 below.
    20200305-snoqualmie-pass-186.jpg
  • No Parking sign for avalanche control on Teton Pass
    2020206-teton-pass-avalanche-sign-01...nef
  • No Parking sign for avalanche control on Teton Pass
    2020206-teton-pass-avalanche-sign-00...nef
  • No Parking sign for avalanche control on Teton Pass
    2020206-teton-pass-avalanche-sign-00...nef
  • Motorists drive through avalanche debris Sunday on Highway 22 at the base of Glory Bowl on Teton Pass. The artery between Jackson Hole and Teton Valley, Idaho, was closed for four and a half days due to dangerous avalanche conditions during a major winter storm last week. Mitigation efforts during the closure Friday by the Wyoming Department of Transportation’s Gazex system in Glory Bowl set off a slide that deposited more than 15 feet of snow onto the highway.
    20170212-teton-pass-196.JPG
  • An RV drives through avalanche debris Sunday on Highway 22 at the base of Glory Bowl on Teton Pass. The artery between Jackson Hole and Teton Valley, Idaho, was closed for four and a half days due to dangerous avalanche conditions during a major winter storm last week. Mitigation efforts during the closure Friday by the Wyoming Department of Transportation’s Gazex system in Glory Bowl set off a slide that deposited more than 15 feet of snow onto the highway.
    20170212-teton-pass-161.JPG
  • A car drives through avalanche debris Sunday on Highway 22 at the base of Glory Bowl on Teton Pass. The artery between Jackson Hole and Teton Valley, Idaho, was closed for four and a half days due to dangerous avalanche conditions during a major winter storm last week. Mitigation efforts during the closure Friday by the Wyoming Department of Transportation’s Gazex system in Glory Bowl set off a slide that deposited more than 15 feet of snow onto the highway.
    20170212-teton-pass-136.JPG
  • Wyoming Department of Transportation sighting in new Howitzer gun for avalanche mitigation.
    20150423-wydot-howitzer-104.RAF
  • Wyoming Department of Transportation sighting in new Howitzer gun for avalanche mitigation.
    20150423-wydot-howitzer-090.RAF
  • Wyoming Department of Transportation sighting in new Howitzer gun for avalanche mitigation.
    20150423-wydot-howitzer-082.RAF
  • Wyoming Department of Transportation sighting in new Howitzer gun for avalanche mitigation.
    20150423-wydot-howitzer-077.RAF
  • Wyoming Department of Transportation sighting in new Howitzer gun for avalanche mitigation.
    20150423-wydot-howitzer-065.NEF
  • Wyoming Department of Transportation sighting in new Howitzer gun for avalanche mitigation.
    20150423-wydot-howitzer-046.RAF
  • Wyoming Department of Transportation sighting in new Howitzer gun for avalanche mitigation.
    20150423-wydot-howitzer-038.RAF
  • Wyoming Department of Transportation sighting in new Howitzer gun for avalanche mitigation.
    20150423-wydot-howitzer-031.RAF
  • Wyoming Department of Transportation sighting in new Howitzer gun for avalanche mitigation.
    20150423-wydot-howitzer-024.RAF
  • Wyoming Department of Transportation sighting in new Howitzer gun for avalanche mitigation.
    20150423-wydot-howitzer-012.RAF
  • Wyoming Department of Transportation sighting in new Howitzer gun for avalanche mitigation.
    20150423-wydot-howitzer-014.RAF
  • Wyoming Department of Transportation avalanche technician John Fitzgerald evaluates an metal snow fences in late June high on the hillside above Highway 89 mile marker 151 just south of Jackson. Fitzgerald said the fences, installed about eight years ago and are designed to hold snow in place, have virtually eliminated avalanche problems on the slope and the need for mitigation work.
    20200629-snow-fences-054.jpg
  • A crown of an avalanche triggered by the Wyoming Department of Transportation's Gazex system during last week's closure of Teton Pass is visible in Glory Bowl on Sunday morning. The resulting slide deposited more than 15 feet of snow onto Highway 22 below.
    20170212-teton-pass-148.JPG
  • A ball of fire erupts during a test of a new avalanche mitigation exploder last month at the top of the Casper lift at Jackson Hole Mountain Resort. Jackson native Eric Bresseler of Alpine Infrastructure is developing the system as an American-made alternative to European mitigation systems like Gazex and O'bellx.
    20230526-alpine-infrastructure-206.jpg
  • Avalanche mitigation infrastructure put in place on Interstate 90 near Snoqualmie Pass, Washington, during a recent reconstruction project include an elevated bridge that allows snow from slide paths to pass beneth the roadway.
    20200305-snoqualmie-pass-025.jpg
  • Shelley Bird, public information officer for Canada’s Glacier National Park, outlines ski terrain subject to closures on or near Rogers Pass. The red zones are always off-limits while the yellow areas are subject to intermittent closures prior to and during avalanche mitigation activities.
    20200303-rogers-pass-343.jpg
  • The second of three 40-pound bombs tossed from a helicopter by Wyoming Department of Transportation avalanche technicians explodes in Glory Bowl during avalanche mitigation efforts Friday on Teton Pass. A fourth bomb was exploded in adjacent Twin Slides. Though the charges did not propagate any slide activity, WYDOT stresses that human-triggered avalanches that could impact the highway below remain a possibility on these slopes.
    20190301-glory-bombing-127.JPG
  • The small hamlet of Snoqualmie Pass serves as a base area for three nearby ski operations, as well as a stop for travellers along Interstate 90, the primary corridor for commerce travel in the Pacific Northwest. The recent reconstruction project that updated the infrastructure to mitigate the impact of avalanches in the interstate is along Keechelus Lake, visible east of Snoqualmie Pass in the distance at upper left.
    20200306-snoqualmie-pass-248.jpg
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