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{{Infobox event
On April 6, 2006, three members of the ] patrol team died after falling into a volcanic ] during safety operations near the summit.
| image = MammothMountain PatrolMemorial.jpg
| date = April 6, 2006
| time = 11:29 a.m.
| timezone = ]
| Location = ]
| coordinates = {{coord|37|37|50|N|119|01|57|W|type:landmark_region:US-CA_scale:50000|display=inline,title}}
| cause = Toxic gas exposure from volcanic ]
| reported deaths = Charles Walter Rosenthal, James Juarez, and John Scott McAndrews
}}

On April 6, 2006, three members of the ] ] team died after falling into a volcanic ] near the summit during safety operations. The incident occurred while patrollers were securing a snow-covered geothermal vent following record snowfall. This event highlighted the risks associated with volcanic gases in the area and prompted investigations into safety protocols, as well as memorial efforts to honor the victims.


== Background == == Background ==
], located in California’s ] range, is an active ] and a popular destination for skiing and other recreational activities.<ref>{{Cite web |title=Mammoth Mountain {{!}} U.S. Geological Survey |url=https://www.usgs.gov/volcanoes/mammoth-mountain |access-date=2025-01-05 |website=www.usgs.gov}}</ref> Volcanic activity in the region gives rise to fumaroles, which are natural vents that emit gases such as ], ], and ].<ref>{{Cite journal |last=Cantrell |first=Lee |last2=Young |first2=Michael |date=2009 |title=Fatal fall into a volcanic fumarole |url=https://pubmed.ncbi.nlm.nih.gov/19364170/ |journal=Wilderness & Environmental Medicine |volume=20 |issue=1 |pages=77–79 |doi=10.1580/08-WEME-CR-199.1 |issn=1080-6032 |pmid=19364170}}</ref><ref>{{Cite web |title=Fumarole gas geochemistry and tree-ring radiocarbon data at Mammoth Mountain, California (1989-2016) {{!}} U.S. Geological Survey |url=https://www.usgs.gov/data/fumarole-gas-geochemistry-and-tree-ring-radiocarbon-data-mammoth-mountain-california-1989-2016 |access-date=2025-01-05 |website=www.usgs.gov |language=en}}</ref><ref>{{Cite web |title=Global Volcanism Program {{!}} Report on Long Valley (United States) — June 2006 |url=https://volcano.si.edu/showreport.cfm?doi=10.5479/si.GVP.BGVN200606-323822#:~:text=On%206%20April%202006,%20three,chief%20executive%20officer%20Rusty%20Gregory. |access-date=2025-01-05 |website=volcano.si.edu |language=en |doi=}}</ref> These gases can accumulate in snow-covered depressions, creating an asphyxiation risk. ], located in California's ] range, is an active ] and a popular destination for skiing and other recreational activities.<ref>{{Cite web |title=Mammoth Mountain {{!}} U.S. Geological Survey |url=https://www.usgs.gov/volcanoes/mammoth-mountain |access-date=2025-01-05 |website=www.usgs.gov}}</ref> Volcanic activity in the region gives rise to fumaroles, which are natural vents that emit gases such as ], ], and ].<ref>{{Cite journal |last1=Cantrell |first1=Lee |last2=Young |first2=Michael |date=2009 |title=Fatal fall into a volcanic fumarole |url=https://pubmed.ncbi.nlm.nih.gov/19364170/ |journal=Wilderness & Environmental Medicine |volume=20 |issue=1 |pages=77–79 |doi=10.1580/08-WEME-CR-199.1 |issn=1080-6032 |pmid=19364170}}</ref><ref>{{Cite web |title=Fumarole gas geochemistry and tree-ring radiocarbon data at Mammoth Mountain, California (1989-2016) {{!}} U.S. Geological Survey |url=https://www.usgs.gov/data/fumarole-gas-geochemistry-and-tree-ring-radiocarbon-data-mammoth-mountain-california-1989-2016 |access-date=2025-01-05 |website=www.usgs.gov |language=en}}</ref><ref>{{Cite journal |title=Global Volcanism Program {{!}} Report on Long Valley (United States) — June 2006 |url=https://volcano.si.edu/showreport.cfm?doi=10.5479/si.GVP.BGVN200606-323822#:~:text=On%206%20April%202006,%20three,chief%20executive%20officer%20Rusty%20Gregory. |access-date=2025-01-05 |website=volcano.si.edu |language=en |doi=10.5479/si.GVP.BGVN200606-323822}}</ref> These gases can accumulate in snow-covered depressions, creating an ] risk.


The fumaroles in the area had been a known hazard for years. A similar incident occurred in 1995 when a skier fell into a fumarole at ] and died from inhaling toxic gases. A 1998 incident at nearby Horseshoe Lake also involved a cross-country skier who died from carbon dioxide poisoning after inhaling gas from one of the fumaroles.<ref name=":0">{{Cite web |last=Covarrubias |first=Amanda |last2= |last3= |last4= |date=2006-04-07 |title=3 Die in Mammoth Ski Patrol Accident |url=https://www.latimes.com/archives/la-xpm-2006-apr-07-me-mammoth7-story.html |access-date=2025-01-05 |website=Los Angeles Times |language=en-US}}</ref> The fumaroles in the area had been a known hazard for years. A similar incident occurred in 1995 when a skier fell into a fumarole at ] and died from inhaling toxic gases. A 1998 incident at nearby Horseshoe Lake also involved a cross-country skier who died from carbon dioxide poisoning after inhaling gas from one of the fumaroles.<ref name=":0">{{Cite web |last=Covarrubias |first=Amanda |date=2006-04-07 |title=3 Die in Mammoth Ski Patrol Accident |url=https://www.latimes.com/archives/la-xpm-2006-apr-07-me-mammoth7-story.html |access-date=2025-01-05 |website=Los Angeles Times |language=en-US}}</ref>


Officials said severe winter storms with a record amount of snow on the mountain contributed to the incident.<ref name=":1">{{Cite web |title=Questions arise in deaths of patrollers {{!}} The Seattle Times |url=https://archive.seattletimes.com/archive/20060409/mammoth09/questions-arise-in-deaths-of-patrollers |access-date=2025-01-05 |website=archive.seattletimes.com}}</ref> There had been a record 52 feet of snow.<ref>{{Cite web |date=2006-04-08 |title=Ex-Valley man a ski patrol victim |url=https://www.dailynews.com/2006/04/08/ex-valley-man-a-ski-patrol-victim/ |access-date=2025-01-05 |website=Daily News |language=en-US}}</ref> Officials said severe winter storms with a record amount of snow on the mountain contributed to the incident.<ref name=":1">{{Cite web |title=Questions arise in deaths of patrollers {{!}} The Seattle Times |url=https://archive.seattletimes.com/archive/20060409/mammoth09/questions-arise-in-deaths-of-patrollers |access-date=2025-01-05 |website=archive.seattletimes.com}}</ref> There had been a record 52 feet of snow.<ref>{{Cite web |date=2006-04-08 |title=Ex-Valley man a ski patrol victim |url=https://www.dailynews.com/2006/04/08/ex-valley-man-a-ski-patrol-victim/ |access-date=2025-01-05 |website=Daily News |language=en-US}}</ref> Before this incident, five people had died on or near Mammoth during that year alone.<ref>{{Cite web |last= |last2= |last3= |last4= |date=2006-02-06 |title=Deaths of 5 Skiers Stun Mammoth |url=https://www.latimes.com/local/la-me-mammoth6feb06-story.html |access-date=2025-01-05 |website=Los Angeles Times |language=en-US}}</ref>


== Incident details == == Incident details ==
On Thursday, April 6, 2006, four Mammoth ski patrollers were working to secure a geothermal vent in the upper reaches of Mammoth Mountain ski area's Christmas Bowl. The area had been closed due to heavy snowfall earlier that day. The ski patrol had been digging out fencing that had been buried around the fumarole to prevent skiers from accessing the hazardous vent, which was small but deep.<ref name=":0" /><ref name=":2">{{Cite web |last=Hymon |first=Steve |last2=Covarrubias |first2=Amanda |date=2006-04-08 |title=Mammoth Ski Patrol Deaths Hit Swiftly |url=https://www.latimes.com/archives/la-xpm-2006-apr-08-me-mammoth8-story.html |access-date=2025-01-05 |website=Los Angeles Times |language=en-US}}</ref>According to ] Mayor Rick Wood, the vent was about 12 feet wide and 22 feet deep. He told the LA Times: “The gas levels were very high. When the patrollers first went to fence it off, there was a lot of snow, but the opening was quite small.” On Thursday, April 6, 2006, four Mammoth ski patrollers were working to secure a geothermal vent on Christmas Bowl run (east of Chair 3, now Face Lift Express).<ref>{{Cite web |title=Remember {{!}} Ski Patrol {{!}} Mammoth Mountain |url=https://www.mammothmountain.com/on-the-mountain/safety/we-remember |access-date=2025-01-05 |website=www.mammothmountain.com}}</ref> Ski patrol had worked around the vents for years.<ref>{{Cite web |last1=Hymon |first1=Steve |last2=Covarrubias |first2=Amanda |date=2006-04-09 |title=How Routine Turned to Tragedy at Mammoth |url=https://www.latimes.com/archives/la-xpm-2006-apr-09-me-mammoth9-story.html |access-date=2025-01-05 |website=Los Angeles Times |language=en-US}}</ref> The area had been closed due to heavy snowfall earlier that day. The ski patrol had been digging out fencing that had been buried around the fumarole to prevent skiers from accessing the hazardous vent, which was small but deep.<ref name=":0" /><ref name=":2">{{Cite web |last1=Hymon |first1=Steve |last2=Covarrubias |first2=Amanda |date=2006-04-08 |title=Mammoth Ski Patrol Deaths Hit Swiftly |url=https://www.latimes.com/archives/la-xpm-2006-apr-08-me-mammoth8-story.html |access-date=2025-01-05 |website=Los Angeles Times |language=en-US}}</ref> According to ] Mayor Rick Wood, the vent was about 12 feet wide and 22 feet deep. He told the LA Times: "The gas levels were very high. When the patrollers first went to fence it off, there was a lot of snow, but the opening was quite small."<ref name=":0" />


The snow above the fumarole gave way, causing two of the patrollers, James Juarez and John "Scott" McAndrews, to fall into the vent. The two mens' cries for help could be heard for a few minutes and then stopped.<ref name=":2" /> Charles Walter Rosenthal, the first rescuer to enter the fumarole, carried a small bottle of oxygen for the fallen patrollers but none for himself. He quickly succumbed to the fumes and died. Jeff Bridges then donned an oxygen mask and entered to help, but was also overcome by the toxic gases. A third rescuer, Steve McCombs, used a rope to enter, pulled Bridges to safety, and managed to escape the fumes. Bridges was treated at Mammoth Lakes Hospital for oxygen deprivation and lung irritation.<ref name=":1" /> Rosenthal died while attempting the rescue.<ref name=":0" /> The snow above the fumarole gave way, causing two of the patrollers, James Juarez and John "Scott" McAndrews, to fall into the vent. The two men's cries for help could be heard for a few minutes and then stopped.<ref name=":2" /> Charles Walter Rosenthal, the first rescuer to enter the fumarole, carried a small bottle of oxygen for the fallen patrollers but none for himself. He quickly succumbed to the fumes and died. Jeff Bridges then donned an oxygen mask and entered to help, but was also overcome by the toxic gases. A third rescuer, Steve McCombs, used a rope to enter, pulled Bridges to safety, and managed to escape the fumes. Bridges was treated at Mammoth Lakes Hospital for oxygen deprivation and lung irritation.<ref name=":1" /> Rosenthal died while attempting the rescue.<ref name=":0" />


The bodies of the fallen patrollers were recovered, and seven other patrollers—six of whom had responded to the accident—were taken to Mammoth Hospital for treatment of injuries.<ref name=":0" /> The ] Coroner determined that the three men died of asphyxiation from the volcanic gases.<ref>{{Cite web |date=2006-04-13 |title=Coroner Says Mammoth Ski Patrollers Suffocated By Volcanic Gases - myMotherLode.com |url=https://www.mymotherlode.com/news/local/97638/coroner-says-mammoth-ski-patrollers-suffocated-by-volcanic-gases.html |access-date=2025-01-05 |language=en-US}}</ref><ref>{{Cite web |title=Ski patrol members asphyxiated |url=https://www.starnewsonline.com/story/news/2006/04/08/ski-patrol-members-asphyxiated/30263000007/ |access-date=2025-01-05 |website=Wilmington Star-News |language=en-US}}</ref> The bodies of the fallen patrollers were recovered, and seven other patrollers—six of whom had responded to the accident—were taken to Mammoth Hospital for treatment of injuries.<ref name=":0" /> The ] Coroner determined that the three men died of asphyxiation from the volcanic gases.<ref>{{Cite web |date=2006-04-13 |title=Coroner Says Mammoth Ski Patrollers Suffocated By Volcanic Gases - myMotherLode.com |url=https://www.mymotherlode.com/news/local/97638/coroner-says-mammoth-ski-patrollers-suffocated-by-volcanic-gases.html |access-date=2025-01-05 |language=en-US}}</ref><ref>{{Cite web |title=Ski patrol members asphyxiated |url=https://www.starnewsonline.com/story/news/2006/04/08/ski-patrol-members-asphyxiated/30263000007/ |access-date=2025-01-05 |website=Wilmington Star-News |language=en-US}}</ref>
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=== Charles Walter Rosenthal === === Charles Walter Rosenthal ===
Charles Walter Rosenthal was a scientist and member of the Mammoth Ski Patrol. He grew up in Los Angeles and attended ].<ref name=":3">{{Cite web |last=Keller |first=Michelle |date=2006-04-08 |title=THE VICTIMS |url=https://www.latimes.com/archives/la-xpm-2006-apr-08-me-juarez8-story.html |access-date=2025-01-05 |website=Los Angeles Times |language=en-US}}</ref> He held a master's degree in ] from the ], and worked as a researcher for the Institute for Computational Earth System Science and as a teaching at UCSB.<ref name=":4">{{Cite web |title=Geography Grad Student Dies in Ski Patrol Accident {{!}} UC Geography |url=https://legacy.geog.ucsb.edu/geography-grad-student-dies-in-ski-patrol-accident/ |access-date=2025-01-05 |language=en-US}}</ref><ref>{{Cite web |date=2006-04-08 |title=UC Santa Barbara Researcher Dies in Mammoth Mountain Gas Vent Accident |url=https://news.ucsb.edu/2006/012108/uc-santa-barbara-researcher-dies-mammoth-mountain-gas-vent-accident |access-date=2025-01-05 |website=The Current |language=en}}</ref> He published articles on remote sensing of snow and avalanche forecasting methods and worked for the US Army Corps of Engineers Cold Regions Research and Engineering Laboratory in the summers.<ref name=":4" /> On the ski patrol, Walter served as the Snow and Avalanche Analyst and president of the Eastern Sierra Avalanche Center, which he helped to establish. He was known for his first ascents in Yosemite Valley and first ski descents in the High Sierra. Walter began working at Mammoth Mountain in 1972-73 and joined the ski patrol in the 1981-82 season.<ref name=":3" /><ref name=":5">{{Cite web |last=SnowBrains |date=2020-04-07 |title=Remembering The Mammoth Mountain Ski Patrollers Who Lost Their Lives on the Mountain April 6, 2006 |url=https://snowbrains.com/remembering-the-mammoth-mountain-ski-patrollers-who-lost-their-lives-on-the-mountain-april-6-2006/#google_vignette |access-date=2025-01-05 |website=SnowBrains |language=en-US}}</ref> Charles Walter Rosenthal was a scientist and member of the Mammoth Ski Patrol. He grew up in Los Angeles and attended ] and ].<ref name=":3">{{Cite web |last=Keller |first=Michelle |date=2006-04-08 |title=THE VICTIMS |url=https://www.latimes.com/archives/la-xpm-2006-apr-08-me-juarez8-story.html |access-date=2025-01-05 |website=Los Angeles Times |language=en-US}}</ref><ref>{{Cite web |last=Palmer |first=Cathy |date=2019-06-26 |title=Burbank High Blog: Charles Walter Rosenthal, BHS '65, Passed Away in 2006 |url=https://burbankhighblog.blogspot.com/2019/06/charles-walter-rosenthal-bhs-65-passed.html |access-date=2025-01-05 |website=Burbank High Blog}}</ref> He held a master's degree in ] from the ], and worked as a researcher for the Institute for Computational Earth System Science and as a teaching at UCSB.<ref name=":4">{{Cite web |title=Geography Grad Student Dies in Ski Patrol Accident {{!}} UC Geography |url=https://legacy.geog.ucsb.edu/geography-grad-student-dies-in-ski-patrol-accident/ |access-date=2025-01-05 |language=en-US}}</ref><ref>{{Cite web |date=2006-04-08 |title=UC Santa Barbara Researcher Dies in Mammoth Mountain Gas Vent Accident |url=https://news.ucsb.edu/2006/012108/uc-santa-barbara-researcher-dies-mammoth-mountain-gas-vent-accident |access-date=2025-01-05 |website=The Current |language=en}}</ref> He published articles on remote sensing of snow and avalanche forecasting methods and worked for the US Army Corps of Engineers Cold Regions Research and Engineering Laboratory in the summers.<ref name=":4" /> On the ski patrol, he served as the Snow and Avalanche Analyst and president of the Eastern Sierra Avalanche Center, which he helped to establish. He was known for his first ascents in Yosemite Valley and first ski descents in the High Sierra. He began working at Mammoth Mountain in 1972–73 and joined the ski patrol in the 1981–82 season.<ref name=":3" /><ref name=":5">{{Cite web |last=SnowBrains |date=2020-04-07 |title=Remembering The Mammoth Mountain Ski Patrollers Who Lost Their Lives on the Mountain April 6, 2006 |url=https://snowbrains.com/remembering-the-mammoth-mountain-ski-patrollers-who-lost-their-lives-on-the-mountain-april-6-2006/#google_vignette |access-date=2025-01-05 |website=SnowBrains |language=en-US}}</ref>


Rosenthal was posthumously recognized by the ] for his actions.<ref>{{Cite web |last=Fund |first=Carnegie Hero |date=2008-12-22 |title=Carnegie Medals awarded to 19 for extraordinary acts of heroism |url=https://www.carnegiehero.org/awardee_pr/december-22-2008/ |access-date=2025-01-05 |website=Carnegie Hero Fund Commission |language=en-US}}</ref>
⚫ === Scottie McAndrews ===

⚫ John Scott McAndrews, 37, known as "Scotty" joined the Mammoth Mountain Ski Patrol in October 2005.<ref name=":3" /> A lifelong outdoors enthusiast from ], McAndrews had previously worked for ] as an outdoor educator after earning his degree from ] in 1991. Although he earned a master's degree in Special Education, McAndrews was drawn to ski patrol work. His peers recognized him as "Rookie of the Year," an award he received just two days before his death.<ref name=":3" /> A scholarship fund was created in his memory.<ref>{{Cite web |date=2016-02-29 |title=Remembering Scott McAndrews with a Scholarship Endowment |url=https://nwoutwardbound.wordpress.com/2016/02/29/remembering-scott-mcandrews-with-a-scholarship-endowment/ |access-date=2025-01-05 |language=en}}</ref>
⚫ === Scotty McAndrews ===
⚫ John Scott McAndrews, 37, known as "Scotty" joined the Mammoth Mountain Ski Patrol in October 2005.<ref name=":3" /> A lifelong outdoors enthusiast from ],<ref>{{Cite web |title=Scott McAndrews Obituary (2006) - Albany, NY - Albany Times Union |url=https://www.legacy.com/us/obituaries/timesunion-albany/name/scott-mcandrews-obituary?id=4912975 |access-date=2025-01-05 |website=Legacy.com}}</ref> McAndrews had previously worked for ] as an outdoor educator after earning his degree from ] in 1991. Although he earned a master's degree in Special Education, McAndrews was drawn to ski patrol work. His peers recognized him as "Rookie of the Year," an award he received just two days before his death.<ref name=":3" /> Scholarship and legacy funds were created in his memory.<ref>{{Cite web |date=2016-02-29 |title=Remembering Scott McAndrews with a Scholarship Endowment |url=https://nwoutwardbound.wordpress.com/2016/02/29/remembering-scott-mcandrews-with-a-scholarship-endowment/ |access-date=2025-01-05 |language=en}}</ref><ref>{{Cite web |title=Legacy Donors |url=https://www.outwardboundcalifornia.org/donate/planned-giving/legacy-donors |access-date=2025-01-05 |website=www.outwardboundcalifornia.org |language=en}}</ref>


=== James Juarez === === James Juarez ===
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== Response and aftermath == == Response and aftermath ==
The aftermath of the incident raised questions regarding whether the geothermal vent should have been labeled a hazardous “confined space,” which would have necessitated different safety protocols. Confined spaces, as defined by the ] (OSHA), are areas that pose specific dangers such as limited entry or exit points, poor ventilation, or the presence of hazardous materials like toxic gases. Had the fumarole been designated a confined space, the ski patrol workers would have been required to use breathing equipment and to be tethered with a rope for safety. This would have ensured that rescuers could have been pulled to safety in case of emergency.<ref name=":2" /> The aftermath of the incident raised questions regarding whether the geothermal vent should have been labeled a hazardous "confined space," which would have necessitated different safety protocols. Confined spaces, as defined by the ] (OSHA), are areas that pose specific dangers such as limited entry or exit points, poor ventilation, or the presence of hazardous materials like toxic gases. Had the fumarole been designated a confined space, the ski patrol workers would have been required to use breathing equipment and to be tethered with a rope for safety. This would have ensured that rescuers could have been pulled to safety in case of emergency.<ref name=":2" />


In the immediate wake of the incident, a Cal/OSHA spokesperson said: "This is not the first time we've been at this site. The first time was in 1995, when we were looking at this exact area and helping the ski area understand why it needs to be avoided. The hazards of this location are well-known."<ref name=":1" /> In the immediate wake of the incident, a Cal/OSHA spokesperson said: "This is not the first time we've been at this site. The first time was in 1995, when we were looking at this exact area and helping the ski area understand why it needs to be avoided. The hazards of this location are well-known."<ref name=":1" />
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=== Cal/OSHA investigation and lawsuit === === Cal/OSHA investigation and lawsuit ===
]'s investigation found that Mammoth Mountain Ski Area failed to properly assess hazards, provide training, and implement safety measures. The resort was fined $50,000 for multiple violations, including lack of hazard evaluation, improper training, and missing warning signs. Additionally, the resort received general citations for not conducting atmosphere tests or providing proper safety equipment. Mammoth Mountain intended to appeal the citations.<ref>{{Cite web |last= |first= |title=Mammoth Fined in Patroller Deaths |url=https://www.saminfo.com/news/sam-headline-news/4819-640-mammoth-fined-in-patroller-deaths |access-date=2025-01-05 |website=SAM Ski Area Management |language=en-gb}}</ref> ]'s investigation found that Mammoth Mountain Ski Area failed to properly assess hazards, provide training, and implement safety measures. The resort was fined $50,000 for multiple violations, including lack of hazard evaluation, improper training, and missing warning signs. Additionally, the resort received general citations for not conducting atmosphere tests or providing proper safety equipment. Mammoth Mountain intended to appeal the citations.<ref>{{Cite web |last= |first= |title=Mammoth Fined in Patroller Deaths |url=https://www.saminfo.com/news/sam-headline-news/4819-640-mammoth-fined-in-patroller-deaths |access-date=2025-01-05 |website=SAM Ski Area Management |language=en-gb}}</ref>

Two families filed a civil lawsuit against the federal government in connection to the incident.<ref>{{Cite web |title=Families Sue USA for Fatal Fumarole |url=https://www.courthousenews.com/families-sue-usa-for-fatal-fumarole/ |access-date=2025-01-05 |website=www.courthousenews.com |language=en-US}}</ref>


=== Memorials === === Memorials ===
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== References == == References ==
<references />

]
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Latest revision as of 17:42, 8 January 2025

2006 Mammoth Mountain Ski Patrol Deaths
DateApril 6, 2006
Time11:29 a.m. (Pacific Time Zone)
LocationMammoth Mountain Ski Area
Coordinates37°37′50″N 119°01′57″W / 37.63056°N 119.03250°W / 37.63056; -119.03250
CauseToxic gas exposure from volcanic fumarole
DeathsCharles Walter Rosenthal, James Juarez, and John Scott McAndrews

On April 6, 2006, three members of the Mammoth Mountain ski patrol team died after falling into a volcanic fumarole near the summit during safety operations. The incident occurred while patrollers were securing a snow-covered geothermal vent following record snowfall. This event highlighted the risks associated with volcanic gases in the area and prompted investigations into safety protocols, as well as memorial efforts to honor the victims.

Background

Mammoth Mountain, located in California's Sierra Nevada range, is an active stratovolcano and a popular destination for skiing and other recreational activities. Volcanic activity in the region gives rise to fumaroles, which are natural vents that emit gases such as carbon dioxide, Nitrogen, and hydrogen sulfide. These gases can accumulate in snow-covered depressions, creating an asphyxiation risk.

The fumaroles in the area had been a known hazard for years. A similar incident occurred in 1995 when a skier fell into a fumarole at Lassen Volcanic National Park and died from inhaling toxic gases. A 1998 incident at nearby Horseshoe Lake also involved a cross-country skier who died from carbon dioxide poisoning after inhaling gas from one of the fumaroles.

Officials said severe winter storms with a record amount of snow on the mountain contributed to the incident. There had been a record 52 feet of snow. Before this incident, five people had died on or near Mammoth during that year alone.

Incident details

On Thursday, April 6, 2006, four Mammoth ski patrollers were working to secure a geothermal vent on Christmas Bowl run (east of Chair 3, now Face Lift Express). Ski patrol had worked around the vents for years. The area had been closed due to heavy snowfall earlier that day. The ski patrol had been digging out fencing that had been buried around the fumarole to prevent skiers from accessing the hazardous vent, which was small but deep. According to Mammoth Lakes Mayor Rick Wood, the vent was about 12 feet wide and 22 feet deep. He told the LA Times: "The gas levels were very high. When the patrollers first went to fence it off, there was a lot of snow, but the opening was quite small."

The snow above the fumarole gave way, causing two of the patrollers, James Juarez and John "Scott" McAndrews, to fall into the vent. The two men's cries for help could be heard for a few minutes and then stopped. Charles Walter Rosenthal, the first rescuer to enter the fumarole, carried a small bottle of oxygen for the fallen patrollers but none for himself. He quickly succumbed to the fumes and died. Jeff Bridges then donned an oxygen mask and entered to help, but was also overcome by the toxic gases. A third rescuer, Steve McCombs, used a rope to enter, pulled Bridges to safety, and managed to escape the fumes. Bridges was treated at Mammoth Lakes Hospital for oxygen deprivation and lung irritation. Rosenthal died while attempting the rescue.

The bodies of the fallen patrollers were recovered, and seven other patrollers—six of whom had responded to the accident—were taken to Mammoth Hospital for treatment of injuries. The Mono County, California Coroner determined that the three men died of asphyxiation from the volcanic gases.

Victims

Charles Walter Rosenthal

Charles Walter Rosenthal was a scientist and member of the Mammoth Ski Patrol. He grew up in Los Angeles and attended Burbank High School (Burbank, California) and University of California, Los Angeles. He held a master's degree in snow hydrology from the University of California, Santa Barbara, and worked as a researcher for the Institute for Computational Earth System Science and as a teaching at UCSB. He published articles on remote sensing of snow and avalanche forecasting methods and worked for the US Army Corps of Engineers Cold Regions Research and Engineering Laboratory in the summers. On the ski patrol, he served as the Snow and Avalanche Analyst and president of the Eastern Sierra Avalanche Center, which he helped to establish. He was known for his first ascents in Yosemite Valley and first ski descents in the High Sierra. He began working at Mammoth Mountain in 1972–73 and joined the ski patrol in the 1981–82 season.

Rosenthal was posthumously recognized by the Carnegie Hero Fund for his actions.

Scotty McAndrews

John Scott McAndrews, 37, known as "Scotty" joined the Mammoth Mountain Ski Patrol in October 2005. A lifelong outdoors enthusiast from Scranton, Pennsylvania, McAndrews had previously worked for Outward Bound as an outdoor educator after earning his degree from Penn State University in 1991. Although he earned a master's degree in Special Education, McAndrews was drawn to ski patrol work. His peers recognized him as "Rookie of the Year," an award he received just two days before his death. Scholarship and legacy funds were created in his memory.

James Juarez

James Juarez, 35, was a member of the ski patrol since 2002. Originally from Granada Hills, California, he graduated from John F. Kennedy High School (Los Angeles) in 1989 and joined the United States Marine Corps. He attended Los Angeles Pierce College and finished his education at a community college in San Diego. He had a background in both ski patrolling and lifeguarding, including at Solana Beach, California. He suffered a serious back injury while working on ski runs that took him a year to recover from. Earlier in the year, his girlfriend, Sara Johanna Carlsson, a fellow ski patroller, was killed in an avalanche while off-duty. In addition to his work as a ski patroller, Juarez enjoyed surfing, leather work, and cooking.

Response and aftermath

The aftermath of the incident raised questions regarding whether the geothermal vent should have been labeled a hazardous "confined space," which would have necessitated different safety protocols. Confined spaces, as defined by the Occupational Safety and Health Administration (OSHA), are areas that pose specific dangers such as limited entry or exit points, poor ventilation, or the presence of hazardous materials like toxic gases. Had the fumarole been designated a confined space, the ski patrol workers would have been required to use breathing equipment and to be tethered with a rope for safety. This would have ensured that rescuers could have been pulled to safety in case of emergency.

In the immediate wake of the incident, a Cal/OSHA spokesperson said: "This is not the first time we've been at this site. The first time was in 1995, when we were looking at this exact area and helping the ski area understand why it needs to be avoided. The hazards of this location are well-known."

Cal/OSHA investigation and lawsuit

Cal/OSHA's investigation found that Mammoth Mountain Ski Area failed to properly assess hazards, provide training, and implement safety measures. The resort was fined $50,000 for multiple violations, including lack of hazard evaluation, improper training, and missing warning signs. Additionally, the resort received general citations for not conducting atmosphere tests or providing proper safety equipment. Mammoth Mountain intended to appeal the citations.

Two families filed a civil lawsuit against the federal government in connection to the incident.

Memorials

Days after the accident, a memorial was held on the mountain. In 2007, Mammoth dedicated a stone monument at the summit in memory of the three men. Designed by Larry Walker, the memorial was placed at a summit location. The site was chosen for its inspiring view and year-round accessibility.

In 2016, hundreds attended a memorial service that marked the 10th anniversary of the accident.

References

  1. "Mammoth Mountain | U.S. Geological Survey". www.usgs.gov. Retrieved 2025-01-05.
  2. Cantrell, Lee; Young, Michael (2009). "Fatal fall into a volcanic fumarole". Wilderness & Environmental Medicine. 20 (1): 77–79. doi:10.1580/08-WEME-CR-199.1. ISSN 1080-6032. PMID 19364170.
  3. "Fumarole gas geochemistry and tree-ring radiocarbon data at Mammoth Mountain, California (1989-2016) | U.S. Geological Survey". www.usgs.gov. Retrieved 2025-01-05.
  4. "Global Volcanism Program | Report on Long Valley (United States) — June 2006". volcano.si.edu. doi:10.5479/si.GVP.BGVN200606-323822. Retrieved 2025-01-05.
  5. ^ Covarrubias, Amanda (2006-04-07). "3 Die in Mammoth Ski Patrol Accident". Los Angeles Times. Retrieved 2025-01-05.
  6. ^ "Questions arise in deaths of patrollers | The Seattle Times". archive.seattletimes.com. Retrieved 2025-01-05.
  7. "Ex-Valley man a ski patrol victim". Daily News. 2006-04-08. Retrieved 2025-01-05.
  8. "Deaths of 5 Skiers Stun Mammoth". Los Angeles Times. 2006-02-06. Retrieved 2025-01-05.
  9. "Remember | Ski Patrol | Mammoth Mountain". www.mammothmountain.com. Retrieved 2025-01-05.
  10. Hymon, Steve; Covarrubias, Amanda (2006-04-09). "How Routine Turned to Tragedy at Mammoth". Los Angeles Times. Retrieved 2025-01-05.
  11. ^ Hymon, Steve; Covarrubias, Amanda (2006-04-08). "Mammoth Ski Patrol Deaths Hit Swiftly". Los Angeles Times. Retrieved 2025-01-05.
  12. "Coroner Says Mammoth Ski Patrollers Suffocated By Volcanic Gases - myMotherLode.com". 2006-04-13. Retrieved 2025-01-05.
  13. "Ski patrol members asphyxiated". Wilmington Star-News. Retrieved 2025-01-05.
  14. ^ Keller, Michelle (2006-04-08). "THE VICTIMS". Los Angeles Times. Retrieved 2025-01-05.
  15. Palmer, Cathy (2019-06-26). "Burbank High Blog: Charles Walter Rosenthal, BHS '65, Passed Away in 2006". Burbank High Blog. Retrieved 2025-01-05.
  16. ^ "Geography Grad Student Dies in Ski Patrol Accident | UC Geography". Retrieved 2025-01-05.
  17. "UC Santa Barbara Researcher Dies in Mammoth Mountain Gas Vent Accident". The Current. 2006-04-08. Retrieved 2025-01-05.
  18. ^ SnowBrains (2020-04-07). "Remembering The Mammoth Mountain Ski Patrollers Who Lost Their Lives on the Mountain April 6, 2006". SnowBrains. Retrieved 2025-01-05.
  19. Fund, Carnegie Hero (2008-12-22). "Carnegie Medals awarded to 19 for extraordinary acts of heroism". Carnegie Hero Fund Commission. Retrieved 2025-01-05.
  20. "Scott McAndrews Obituary (2006) - Albany, NY - Albany Times Union". Legacy.com. Retrieved 2025-01-05.
  21. "Remembering Scott McAndrews with a Scholarship Endowment". 2016-02-29. Retrieved 2025-01-05.
  22. "Legacy Donors". www.outwardboundcalifornia.org. Retrieved 2025-01-05.
  23. "Mammoth Fined in Patroller Deaths". SAM Ski Area Management. Retrieved 2025-01-05.
  24. "Families Sue USA for Fatal Fumarole". www.courthousenews.com. Retrieved 2025-01-05.
  25. Archives, L. A. Times (2006-04-14). "Memorial Scheduled for 3 Members of Ski Patrol". Los Angeles Times. Retrieved 2025-01-05.
  26. "Ten years after". thesheetnews.com. Retrieved 2025-01-05.
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