Launching Bombs with ‘Bushrat’

Launching Bombs with ‘Bushrat’— 1960s style Avalanche Control
by Jeff Slack, Whistler Museum & Archives

There are few truer mountain-town experiences than being awoken in the early dawn by the distant rattle of avalanche bombs. While providing an unmistakable announcement of fresh snow begging to get tracked up, they also serve as a not-so-subtle reminder that the mountains are a complex and often hostile landscape, demanding caution and respect.

Despite being romanticized as little more than “throwing bombs, skiing powder, and breaking hearts,” avalanche control at a ski resort is a highly technical profession, requiring extensive training in explosives, first aid, weather forecasting, and snow science. But it wasn’t always that way. When Whistler Mountain first opened in 1966, the concept of snow science barely existed, and the only technical avalanche manual in North America was almost 15 years old.

Setting up the Avalauncher artillery gun, to clear the upper Harmony Zone. 1970s.
Setting up the Avalauncher artillery gun, to clear the upper Harmony Zone. 1970s.

Learning to safely harness the destructive power of avalanches took time and dedicated practice by hundreds of individuals. We recently spoke to one of these pioneers about the nascent years of avalanche control work on Whistler Mountain.

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After a brief, somewhat lost-in-translation introduction to the avalanche world as a rookie ski patroller in St. Moritz, Switzerland during the 1966-67 season, John “Bushrat” Hetherington joined the Whistler Mountain pro ski patrol in December 1967, the mountain’s third season of operations.

Back then, John recalls, “avalanche control consisted mainly of putting a bunch of Forsight dynamite sticks together and going out and going ‘I think we should throw some over here, and I think we should throw some over there.’ Over time there was some experience that certain slopes had a tendency to avalanche…

There was no science behind it, just ‘let’s throw lots and lots of bombs.”

Bruce Watt (centre), Roger McCarthy (left) and an unidentified patroller examine the wind data from their anemometer.
Bruce Watt (centre), Roger McCarthy (left) and an unidentified patroller examine the wind data from their anemometer.

That winter Monty Atwater, inventor of the Avalauncher, visited Whistler to demonstrate his avalanche artillery gun. “It would have given us the capability of reaching the remoter areas which today are now lift-accessed but back then were not (Peak, Upper Harmony, etc]” but issues with the system, the unreliability of the shells in particular, left Whistler uncomfortable with the powerful but crude technology. “It went away in storage” and patrollers continued to rely on setting all their charges by hand. To get a better sense of the danger such work entailed, the patrol team didn’t receive their first avalanche transceivers until 1973 (they didn’t become common equipment for non-professionals until the 1990s).

After his inaugural Whistler season, John set our working as an avalanche professional for mines up north and in the interior. Then, an incident during the winter of 1972 served as an eye-opening and watershed moment for the patrol. A typical Coast Mountain winter storm blanketed the mountain in several feet of snow. Four skiers went missing during the blizzard, and it took several days to determine that they had been caught in an avalanche, whose debris had subsequently been buried by even more storm snow. After that incident it became painfully clear that avalanche control was a serious and crucial aspect of ski area management.

Norm Wilson, formerly the head of ski patrol Alpine Meadows, California was then hired to modernize Whistler Mountain’s avalanche control system. More sophisticated terrain analysis and systematic patrol routes were established to clear slopes of their slide risk, and an infrastructure was put in place to conduct more detailed short and long-term snow and weather study. From that point on, daily avalanche planning increasingly began from analysis of the overnight snow and weather readings, rather than gut instinct.ACCESS WMA_P89_0383_WMSC

That same season, advances in the Avalauncher system brought their gun out of storage and it was installed on a platform near the top of the t-bars. Being able to trigger avalanches from a distance made the daily control routine safer and less-gruelling.

The expertise that developed in subsequent years, thanks to the system and infrastructure put in place by Norm Wilson, and the dedicated practice by a generation of Whistler patrollers, made a huge contribution to our understanding of avalanche forecasting, not just in Whistler, but Canada-wide. John Hetherington, returned to Whistler the following winter, and was soon second in command. He went on to become a widely respected avalanche consultant, heli-ski guide, SAR-member, and board member of the Canadian Avalanche Association.

A snow ghost dances after the Avalauncher does its thing.
A snow ghost dances after the Avalauncher does its thing.

Other major contributions include the creation of the Canadian Avalanche Rescue Dog Association by local patroller Bruce Watt, spurred by his own burial and rescue from a slide while patrolling on Whistler in 1979. Whistler Mountain was the only ski area with a large contingent at an inaugural meeting of avalanche professionals in Vancouver in 1981—most of the others worked for Parks Canada in Rogers Pass, Banff and Jasper. The meeting led to the creation of the Canadian Avalanche Association.

Patrol surveys the debris of a large slide in Glacier Bowl. 1970s.
Patrol surveys the debris of a large slide in Glacier Bowl. 1970s.

 

Great footage from a north-facing slide on Whistler Mountain, 1979: *embedding disabled by user, please click on link to watch vid…it’s a gooder!

http://www.youtube.com/watch?v=Er0Kem5K1Gs

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