Photogrammetric and LiDAR 3-D rock slope discontinuity mapping and interpretation surveys to improve baseline information for supporting design and construction of capital improvement projects at hydroelectric facilities

Recent improvements in mining-related photogrammetric and LiDAR (Light Detection and Ranging) survey and software tools provide powerful site characterizations to better inform the capital improvement project (CIP) planning process, and in turn, to better support design and construction decisions. This paper presents the application of photogrammetric and LiDAR surveys and their interpretation to the Boundary and Skagit Hydroelectric Projects in Washington State to characterize rock slope stability and kinematics. Field data is collected in a safer manner and more quickly analyzed to meet a tight schedule and budget coupled with professional judgment and experience.