Avalanche Fatalities in Canada and USA

(Photo by Nicolas Teichrob)

(Photo: Nicolas Teichrob)

Abstract

Introduction

Methodology

Results and Analysis

Conclusion

 

INFORMATION

Rogers Pass, BC

Snowmobile Accidents

ADFAR Project

Canada vs USA Standards

Avalanche Assessment

 

MAPS

Avalanche Fatalities in Canada

Avalanche Fatalities in the USA

 

Links

Contacts

Home



Disclaimer

Standards

 
There is a serious lack of standards in the United States of America (USA) when in comes to the hazards of avalanches.  Avalanche zoning for the construction of buildings is determined by individual states, and sometimes individual counties.  This can result in the allowance of construction, under what other states may deam hazardous, but the state of construction deams okay.  In Canada there is a zoning system, with red, white, and blue colours associated.  If an avalanche path has a return period of more then 300 years, then it is zoned white, and any building can be constructed in the run-out zone.  If an avalanche path has a return period of less than 30 years, then it is zoned red, and no structure can be built in the run-out zone.  In between these two return periods is the blue zone, which needs to be assessmed by a professional on the avalanche hazard to determine what structures can be built and with how much avalanche protection measures.  The estimated runout distances are plotted as an extreme Gumbel distribution, and then dynamic models are run for the destructive forces of a potential slide.  Standards like this do not exist in the USA. 

In addition, in general, traditionally Canadian skiers have had a high respect for the mountains, and backcountry entrence is usually taken with much caution and avalanche equipment.  In the USA, many ski resorts have super easy access to the backcountry, and many people enter them ill-prepared.  In addition, there are a lot of mountainous regions that allow people to have only a 30minute drive and be able to access numerous avalanche susceptible mountains.  These two points may be parly respsonible to why there are so many in-ski-hill avalanche deaths in the USA.  As a result of the lack of avalanche standards, each ski hill may operate under their own state or county regulations.  This may mean that one ski hill bombs its slopes and is very diligent on avalanche control, while another ski hill may not have as much money and rather puts caution signs up warning of avalanches.  The latter does nothing to stabilize the slope.  As an avid skier, I know first hand how easy it is to think that slopes just out of ski area boundaries are safe to ski.  This is not the case and never will be.  As much caution needs to be taken on ski-hill backcountry slopes as to any backcountry slopes.  All the appropriate avalanche gear should be carried, knowledge of the winter’s snowpack conditions, knowledge of the local avalanche conditions, and training in slope stability assessment are essential.

 

  caa logo

      A avalanche incident database is created by the CAA from past events in order to try to understand contributing factors involved in triggering avalanches.  The ADFAR project is making use of this database.  The following link is an avalanche incident form that you are encouraged to fill out if you or a group member experiences or sees an avalanche.  There is also a link on the CAA website, which will better describe how to fill an incident report out and why it is important. These reports will benefit research and perhaps act as a aid to further understand the human biases involved and the physics behind these deadly avalanches.                                              

CAA Incident Report Form