Pictures of what BC Hydro is defying. Gravity and too much water wins every time.
This is the “Bedrock” that the proposed Site C dam is to be built in. It is a Shaftbury shale which was mud some 70 million years ago. A rainfall event of some 2 inches in a half hour on July 20, 2016 caused some of this slope failure. The Montmorillonite clay soils overlaying the shale is even much more unstable under wet conditions.
As noted the taxpayers of BC are going to be paying astronomical funds to support BC’s economic and environmental Disaster of the 21st Century..
Pass this on please as a picture is worth more than a 1000 words.