CLIENT: BC Ministry of Transportation and Infrastructure
LOCATION: Lillooet, BC
BCG Engineering Inc. (BGC) was engaged by the BC Ministry of Transportation and Infrastructure to investigate and propose a stabilization design for the Ten Mile Landslide near Lillooet BC. One aspect of the work plan includes change detection analysis and interpretation of Airborne Laser Scan (ALS) and Terrestrial Laser Scan (TLS) data.
Using the ALS data collected by MOTI between 2006 and 2016, BGC has been able to understand the movement rate and kinematics of the failure. This information is being used to evaluate previous mitigation efforts and potential solutions for stabilization of the highway
The information gained through the ALS and TLS analysis enabled BGC to evaluate total displacement trends over time for the entire landslide while also distinguishing movement rates for individual blocks within the slide mass. Unlike in situ instrumentation, analysis of the remote sensing data does not require a priori selection of regions to monitor. The analysis at Ten Mile Slide enables us to interpret the slide boundary (including toe and crest locations) and to identify regions of high activity, internal rotation, and movement of blocks within the slide mass. This information also enables BGC to interpret how previous mitigation efforts affected the slide mass deformation, which is critical for addressing future slide mitigation options