Okay, here it is. Sorry it took so long. This is fairly short and to the point. I was trying to roughly follow the format used in the American Alpine Club's Accidents in North American Mountaineering Journal because I plan to submit this. Let me know if you'd like more detail on any particular aspect and I'll try to expand.
FALL ON SNOW, INADEQUATE PROTECTION
Fall involving a climbing team of 3 evenly spaced on a 32M rope. The climbing team came under heavy bombardment by ice fall on the sun-exposed Hogsback and moved right up a shaded couloir to the right of the Hogsback to escape this hazard. The top of the couloir was just below the Pearly Gates.
The climbing team was simul-climbing up the 40-45° couloir, which was approximately 40M long. One 24” picket had been placed vertically as protection approximately half way up the couloir. Placement required two whacks with an ice axe to get through the ice crust.
Witness accounts describe the second climber slipping just below the picket and the leader falling immediately after. The picket was pulled out of the snow intact and still attached to the climbing rope. The third climber was firmly set in self-arrest, but was pulled off by the two falling climbers. The resulting fall was approximately 500’ on firm snow into a clean run out just above Devil’s Kitchen.
During the fall the climbers crossed the rope of another rope team and cut through their rope, which avoided dragging the other team off the mountain.
Portland Mountain Rescue and a Forest Service Climbing Ranger were on scene almost immediately. Two of the injured parties were evacuated by helicopter with significant head, neck, back, and leg injuries, one walked out on his own. All three climbers were wearing helmets.
ANALYSIS
Snow conditions were icy. It had possibly rained overnight, creating a crust on the surface. Snow conditions under the crust are unknown. A single picket was inadequate to hold two falling climbers under these snow conditions.