{"id":48249,"date":"2021-03-03T00:24:00","date_gmt":"2021-03-03T07:24:00","guid":{"rendered":"https:\/\/dh.durangoherald.com\/tj\/cdot-triggers-avalanches-on-colorado-145-by-remote-control\/"},"modified":"2026-03-31T03:42:05","modified_gmt":"2026-03-31T09:42:05","slug":"cdot-triggers-avalanches-on-colorado-145-by-remote-control","status":"publish","type":"post","link":"https:\/\/dh.durangoherald.com\/tj\/cdot-triggers-avalanches-on-colorado-145-by-remote-control\/","title":{"rendered":"CDOT triggers avalanches on Colorado 145 by remote control"},"content":{"rendered":"\n<p><!-- gallery:53d5493a-44bb-4474-923e-f8766c8594c0 --><\/p>\n<figure class=\"wp-block-embed is-type-video wp-block-embed-youtube naviga-video-embed\">\n<div class=\"wp-block-embed__wrapper\"><iframe loading=\"lazy\" width=\"560\" height=\"315\" src=\"https:\/\/www.youtube.com\/embed\/LBqh-YEo2C4\" frameborder=\"0\" allow=\"accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture\" allowfullscreen><\/iframe><\/div>\n<\/figure>\n<p>A loud bang reverberates in the Dolores Valley north of Rico, and a white plume erupts from a steep gully high above Colorado Highway 145.<\/p>\n<p>In seconds, a wave of snow hits the closed highway, then settles into a pile more than 6 feet deep.<\/p>\n<p>A front-end loader appears and clears a highway lane in 15 minutes, and the road is open again after being closed for about 35 minutes.<\/p>\n<p>It was just a morning\u2019s work.<\/p>\n<p>The <a href=\"https:\/\/youtu.be\/LBqh-YEo2C4%20\" target=\"_blank\" rel=\"noopener\">avalanche mitigation<\/a> was conducted Wednesday by the Colorado Department of Transportation using a new remote control system installed in the fall.<\/p>\n<p><em>The Journa<\/em>l was invited to observe the new technology in use to control an avalanche-prone area.<\/p>\n<p>Five, 30-foot-tall towers that lower explosive charges on a tether were installed in \u201cfrequent offender\u201d slide paths that lurk above the state highway between Rico and Lizard Head Pass.<\/p>\n<p>The systems were provided and installed by Wyssen Avalanche Control of Switzerland. They are safer and more efficient way to mitigate avalanche danger for travelers, said CDOT maintenance supervisor Todd Jones.<\/p>\n<p>\u201cThis system is a more versatile tool for controlling these slide paths that run pretty often,\u201d he said.<\/p>\n<p>During an active winter, the Yellow Springs, Yellow Wall and Peterson slide paths where towers were placed can produce natural avalanches many times a week, or even per day. They might or might not hit the highway.<\/p>\n<p>\u201cOur main goal is to bring down smaller avalanches frequently to avoid a large natural one,\u201d Jones said.<\/p>\n<p>The remote control system reduces traffic delays, he said, and can be used at night or in low visibility during storms.<\/p>\n<p>The explosives do not have to be handled, and the control work can be done with fewer staff in harm\u2019s way.<\/p>\n<div class=\"naviga-element naviga-subheadline1\">Project cost $1.4 million<\/div>\n<p>The more common CDOT avalanche control methods utilize the Avalauncher nitrogen cannon, or a howitzer that shoots an explosive charge into the path from the roadway. Sometimes helicopters are used to drop a charge. They all require good daytime visibility, and crews tend to be closer to the hazardous slide path. CDOT uses the Avalauncher on Colorado 145 and from helicopters on other slide paths around Lizard Head Pass<\/p>\n<p>The highway towers were activated last month. The project cost $1.4 million and was deployed to mitigate the troublesome Yellow Springs, Yellow Wall and Peterson slide paths.<\/p>\n<p>Four of the five towers released charges and triggered slides. One slide reached the highway from the Yellow Springs gully, and one failed to drop and did not detonate. The tower was being reviewed by Wyssen and CDOT technicians, who monitored the mission with a live data feed.<\/p>\n<p>CDOT partners with the Colorado Avalanche Information Center to analyze and conduct avalanche control work on roadways.<\/p>\n<p><figure class=\"wp-block-image naviga-inline-image\"><img decoding=\"async\" src=\"https:\/\/imengine.public.prod.dur.navigacloud.com\/?uuid=03d3f853-19f1-4de5-a488-fc95bc46794c&amp;function=cover&amp;type=preview&amp;source=false&amp;width=2000\" alt=\"Becca Hodgetts, a forecaster for the Colorado Avalanche Information Center, monitors avalanche control work in cooperation with the Colorado Department of Transportation.\" class=\"naviga-image\" loading=\"lazy\"><figcaption><span class=\"caption\">Becca Hodgetts, a forecaster for the Colorado Avalanche Information Center, monitors avalanche control work in cooperation with the Colorado Department of Transportation.<\/span><span class=\"credit\">Jim Mimiaga\/The Journal<\/span><\/figcaption><\/figure>\n<\/p><p>Becca Hodgetts, CAIC forecaster for the mountains of southern Colorado, was on scene to analyze avalanche conditions along the highway and review the slides.<\/p>\n<p>She said a dry start to the winter led to weak layers at the base of the snowpack, increasing the potential for avalanches.<\/p>\n<p>\u201cIt has been a pretty dangerous year, and it\u2019s somewhat anomalous,\u201d Hodgetts said. \u201cOn the way up here, I could see signs of fresh avalanches.\u201d<\/p>\n<p>Extreme avalanche conditions this winter happen about once every 10 years, she said.<\/p>\n<p>CDOT has partnered with CAIC on highway avalanche control work since 1991, said CDOT spokesperson Lisa Schwantes, and there has not been a CDOT highway avalanche death in that time. A CDOT worker was killed by an avalanche on Red Mountain Pass in 1990.<\/p>\n<p>Before the towers dropped the explosives into the slide path, the highway was closed in both directions, and a sweep ensured the area was clear of vehicles and recreationists.<\/p>\n<p>CDOT crew and media wore avalanche beacons and observed the avalanche from a distance. During the work early Wednesday morning, temperatures were below zero.<\/p>\n<p><figure class=\"wp-block-image naviga-inline-image\"><img decoding=\"async\" src=\"https:\/\/imengine.public.prod.dur.navigacloud.com\/?uuid=07b89e5c-f4a7-4880-8ffe-8d0fc809ef00&amp;function=cover&amp;type=preview&amp;source=false&amp;width=2000\" alt=\"A crew from CDOT and the Colorado Avalanche Information Center observes the slide path of an avalanche released by a new remote control system.\" class=\"naviga-image\" loading=\"lazy\"><figcaption><span class=\"caption\">A crew from CDOT and the Colorado Avalanche Information Center observes the slide path of an avalanche released by a new remote control system.<\/span><span class=\"credit\">Jim Mimiaga\/The Journal<\/span><\/figcaption><\/figure>\n<\/p><p>Spotters were positioned to watch for secondary avalanches that could be let loose from the concussive blast. Crews blocked traffic in both directions a safe distance away.<\/p>\n<p>When the highway was closed and crews were in position, Jones sent a coded command from his cell phone that told the tower to lower and release a charge above the slide path. The tower\u2019s deployment box then reset, ready to deploy another charge.<\/p>\n<p>The CDOT crew and CAIC were impressed by the results.<\/p>\n<p>\u201cThe system is efficient and improves safety for CDOT crews and the public,\u201d said Schwantes.<\/p>\n<p>\u201cIt\u2019s good. We\u2019ll take it. You can see it released the recent fresh snowfall,\u201d Hodgetts said, and it reduced the risk for a natural slide onto the highway.<\/p>\n<p>The new technology is favored by CDOT because of its efficiency and reliability. Traditional howitzers likely will be phased out of avalanche control because of their age, Schwantes said.<\/p>\n<p>CDOT operates more than 30 remote control avalanche systems at several locations on high mountain highways and the Interstate Highway 70 corridor. In Southwest Colorado, they are used on Colorado 145 near Lizard Head Pass, on U.S. 160 at Wolf Creek Pass and on U.S. 50 at Monarch Pass.<\/p>\n<p>Every winter, CDOT and CAIC monitor and control about 278 of 522 avalanche paths above state highways.<\/p>\n\n<p><em class=\"mwc_shirttail\"><a href=\"mailto:jmimiaga@the-journal.com\">jmimiaga@the-journal.com<\/a><\/em><\/p>\n","protected":false},"excerpt":{"rendered":"<p>technology clears snow from slide paths above highway near Telluride<\/p>\n","protected":false},"author":1,"featured_media":48250,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[],"tags":[377,576,21,13,28,2470,29,497],"naviga_topic":[],"class_list":["post-48249","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","tag-avalanche-landslide","tag-colorado-department-of-transportation","tag-cortez","tag-frontpage-lead","tag-headlines","tag-lizard-head-pass","tag-newsletter","tag-rico"],"acf":[],"author_name":"dh_admin","_links":{"self":[{"href":"https:\/\/dh.durangoherald.com\/tj\/wp-json\/wp\/v2\/posts\/48249","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/dh.durangoherald.com\/tj\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/dh.durangoherald.com\/tj\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/dh.durangoherald.com\/tj\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/dh.durangoherald.com\/tj\/wp-json\/wp\/v2\/comments?post=48249"}],"version-history":[{"count":1,"href":"https:\/\/dh.durangoherald.com\/tj\/wp-json\/wp\/v2\/posts\/48249\/revisions"}],"predecessor-version":[{"id":87334,"href":"https:\/\/dh.durangoherald.com\/tj\/wp-json\/wp\/v2\/posts\/48249\/revisions\/87334"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/dh.durangoherald.com\/tj\/wp-json\/wp\/v2\/media\/48250"}],"wp:attachment":[{"href":"https:\/\/dh.durangoherald.com\/tj\/wp-json\/wp\/v2\/media?parent=48249"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/dh.durangoherald.com\/tj\/wp-json\/wp\/v2\/categories?post=48249"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/dh.durangoherald.com\/tj\/wp-json\/wp\/v2\/tags?post=48249"},{"taxonomy":"naviga_topic","embeddable":true,"href":"https:\/\/dh.durangoherald.com\/tj\/wp-json\/wp\/v2\/naviga_topic?post=48249"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}