Although the area below
North Peak (peak on the right) was the original source of concern in 1911,
studies showed that the geological structure was different than that for the
Frank Slide and therefore the same sliding mechanism did not exist.In 1931, John Allan (founder of the Alberta
Geological Survey) discovered a series of deep cracks around South Peak
(yellow dash) and based on a review of the orientation of the cracks and
bedrock structure, estimated that a slide with a volume of approximately 5
million cubic metres could detach and fail in a similar manner as to the 1903
slide.At this time some very
rudimentary monitoring was undertaken (tape measurement between painted marks
on crack sides).In the 1980’s a
series of monitoring points were also installed but monitoring discontinued
prior to 1990.
