Wiser provided volumetric data of unstable material that was removed by a heavy construction contractor from a rock bluff just below the dam and hydroelectric power plant on Cordell Hull Lake in Tennessee. The bluff was 2,000 feet long and 70 feet tall. The material was to be used as rip-rap to stabilize the river bank below. Wiser addressed several challenges by employing long range laser scanning technology with the Topcon GLS-1500 scanner. This enabled the capture of high density survey data from a safe location across the river. There was a large amount of vegetation on the bluff which was removed from the resulting point cloud using Terrascan’s LiDAR classification techniques. The result was a very accurate and highly detailed model of the bare rock face and riverbank.
Initial deliverables included typical plan views and cross sections along with 3-D color renderings of the point cloud from various perspectives in Microstation dgn format. As an added value, Wiser provided the point cloud along with no-cost software and basic training that enabled our client to directly view, take measurements and create exhibits of the point cloud data. This proved to be very beneficial for both planning and communication between the contractor, Wiser and USACE staff.