Kim took most of the pictures while Sarah, Matt, and Caleb built the snow castle wall and I prepped the chalk dispensing target:
The final snow castle wall just prior to destruction:
The road flares are to ignite the four gallons of gasoline located high on the left side of the wall, on top of (and behind) the 6 pounds of Boomerite.
The snow, gasoline, and dirt went flying when the Boomerite detonated:
I expected the ground to be bare beneath the explosion but that was not quite the case. Apparently the explosives were too high above the ground to clear it of snow:
Next time we should put the explosives much lower to give the snow more lift.