The BR1 Debris Removal and Slope Stabilization Project was located on the penstock slopes for the Bridge River 1 Generating Station in Shalalth, BC. This was a design-build project, and the scope of work included the following:

• Design of all aspects of the project
• Design, installation and utilization of an innovative flume system to move the debris down 360 m on a 45° to 60° slope into steel Baker holding tanks below
• Removal of almost 5,000 m3 of rock and organic debris from the penstock trenches
• Vegetation removal
• Installation of temporary rockfall slope mesh
• 2,745 shotcrete anchors – total of 4,118 linear metres of #7 (22 mm diameter) threadbar
• 22 rock bolts – total of 117 m linear metres of #7 (22 mm diameter) threadbar
• 10 linear metres of borehole rock drains
• Over 1,500 m3 of fibre-reinforced dry-mix shotcrete on rock slopes
• 188 m3 of non-fibre-reinforced dry-mix shotcrete on soil nail walls and debris deflection walls
• 259 linear metres of debris deflection walls
• 679 soil nails – total of 3,465 linear metres of 32 mm diameter hollow-bar
• 1,962 weep holes
• 245 m3 of lumber debris removal
• 53 tonnes of concrete debris removal
• 17 tonnes of steel debris removal
• 1,495 tonnes of 100/250 kg riprap placement
• Spoil pile management and reclamation

The site presented multiple challenges, including the steep slope and difficult-to-access terrain, rockfall hazards, wide range of temperature and weather conditions, remote location and consistently safe use of a helicopter long-line for transport of materials and equipment to the slope.