The document discusses three large landslides that occurred along the North Saskatchewan River Valley in Edmonton, Alberta. The Keillor Road landslide began with a minor toe failure in 1989 and progressively moved upslope until a major failure in 2002. The Whitemud Road landslide resulted in an 18 m vertical drop in a single day in 1999. The Forest Heights Park landslide has been moving slowly since the early 1900s and continued moving after stabilization efforts. All three landslides involved translational movement along bentonite layers and were influenced by groundwater levels.