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Fatal failures from failing to learn from failure


 

Soon after Anne and I arrived in Seattle, we became hooked on alpine climbing.

Three of our favorite climbs were:

The Inspiration Glacier Route on El Dorado

The Kautz Glacier Route on Mt. Rainier


and 

The West Ridge of Mt. Stuart


It occured to me that alpine climbing was similar to surgery in many ways: it is rewarding, it is technical, and it turns out well most of the time.

 

Also, like climbers, surgeons often do not learn from past failures.

My friend, Colton Bramson, loaned me a book last night called Accidents in North American Climbing 2023. What stuck me as I paged through this book was that a substantial number of fatalities occurred during rappelling. For the non-climbers among you, rappelling is a standard method of descending from a climb in which the climber slides down a rope that is fixed to an anchor.


In contrast to climbing up (where the climber is supported by his/her hands and feet), in rappelling the climber is completely dependent on (1) the anchor fixed to the rock or snow, (2) the link between the anchor and the rope (usually a combination of a carabiner and webbing or cord sling), (3) the rope (passed through  the anchor system so that the ends are of equal length with large knots at the end of each one), (4) the climber’s harness, and (5) the link between the harness and the rope (such as a jumar). The technique of getting it right is shown in this link.  

As can easily be seen there are many points of potential failure:  anchor, carabiner, sling, harness, jumar and the rope (e.g. sliding off the end of the rope). 

Causes of fatal rappel falls have been well documented:

2004 Devils Tower — Fatal rappel error – no knots at the end of the rope 

2006: Sinks Canyon — Fatal fall while rappelling – no knots at the end of the rope

2016: Indian Creek — Uneven rope ends, no knots at the end of the rope

2017: Shelf Road — Fatal rappel error – improper set up of rappel system

2020: 6 rappel-anchor failures, 3 of them fatal 

2022: Joshua Tree (broken sling) – fatality

          Tahquitz (broken sling) – fatality

          Mt. Evans (fell while pulling rope after rappel) – fatality 

In spite of these examples of fatal errors from which climbers could learn, there were 8 known rappelling fatalities in 2023.

Accidents in North American Climbing sought to determine the cause of each failure, even when complete information was not available, and to suggest what could have been done to prevent the failure

45 yo female, Auburn Quarry-only one end of the rope passed through her belay device=>make sure both ends of the rappel rope are passed through the device

51 yo female, Joshua Tree-failure of old anchor and weathered sling=>avoid using anchor systems placed by prior climbers unless they are solid and in mint condition, take time to place new anchor system

22 yo female, Mt. Evans-fall while retrieving rappel rope=>make sure footing is secure and/or that the retrieving climber is anchored so that the act of rope retrieval does not cause a fall

58 yo female, El Dorado Canyon-one end of rope pulled through anchor=>tie knots in the end of each rope strand

two 67 yo males, Glacier National Park-hastily placed anchor pulled from rock=>take time to assure that anchor is solid and redundant

44 yo male, Leavenworth-poor anchor placement leading to anchor failure=>take time to assure that anchor is solid and redundant

33 yo female, Tahquitz Rock-failure of old anchor and weathered sling=>avoid using anchor systems placed by prior climbers unless they are solid and in mint condition, take time to place new anchor system


It is apparent that the American Alpine Club provides a great example of causal modeling. In each case, they sought to determine the counterfactual – what could have been done differently to prevent the rappelling accident – even in cases where complete information was not available.  In addition to the analyses of individual fatalities, they publish their results in their annual publication, Accidents in North American Climbing, so that all climbers have access to the results.
This a perfect example of learning from a relative small number of failures in a space – like orthopaedic surgery – where the great majority of cases are successful (see this link)

Surgery, like climbing, is usually wonderful, 

but past failures contain lessons for preventing future failures 

Mt. Rainier

August 2025


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