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STEEPBANK RIVER VALLEY GEOMORPHOLOGICAL AND GEOLOGICAL CATEGORIZATION

Session: Landslides and Slope Stability I / Mouvements de terrain et stabilité des pentes I

Joanna Chen, Klohn Crippen Berger Ltd (Canada)
Rob Charron, Klohn Crippen Berger Ltd (Canada)
Dan Hepp, Klohn Crippen Berger Ltd (Canada)
Jeff MacLean, Klohn Crippen Berger Ltd (Canada)
Jason Chen, Suncor Energy Inc. (Canada)

Natural terrain hazard assessments require the development of geomorphological and engineering geological maps to understand the past and current performance of the natural river valley slopes. This paper outlines the approach adopted for the geomorphological and engineering geological inventory maps developed for the natural riverbank slopes along the Steepbank River Valley escarpment in Fort McMurray, Alberta.

The inventory maps document the location and spatial distribution of the observed major slope movements and geological features as well as the current physical conditions of the River Valley escarpment slopes. These maps provide an understanding of the nature and magnitude of the various potential hazards in the natural slopes and are considered to be representative of baseline conditions against which future conditions can be compared. The available aerial photographs and surveys indicate that on-going regression of the escarpment slopes is occurring as a result of natural processes.