Project Details

This project was to stabilize approximately 475 LF of rock wall 220’ – 280’ in height to protect workers and powerhouse assets from damage from falling rocks.  The project consisted of removal of vegetation, scaling of loose material, rock anchor and cable installation, and installation of 146,000 SQFT of 4mm Tecco Drape to create a complete stabilization system.  The rock anchors, at the top of the slope, were installed to a depth of 20’ using a trackable drill rig and grouted with high strength grout to provide a secure anchorage of the system and tie off points for workers, to access the face of the wall using rope access methods. Temporary, movable, barrier walls were constructed and placed to protect powerhouse assets during vegetation removal and scaling of loose material on the wall face.  After scaling was completed; 11’ wide rolls of 4 mm Tecco drape sections were unrolled onto the wall face, overlapping each adjacent roll, attached to each other using Tecco clips, and then attached to the upper and lower rock anchor and cables to create the complete stabilization system.  This project was completed in 60 days.